summaryrefslogtreecommitdiffstats
path: root/sound/core/oss
diff options
context:
space:
mode:
Diffstat (limited to 'sound/core/oss')
-rw-r--r--sound/core/oss/Makefile14
-rw-r--r--sound/core/oss/copy.c92
-rw-r--r--sound/core/oss/io.c141
-rw-r--r--sound/core/oss/linear.c180
-rw-r--r--sound/core/oss/mixer_oss.c1460
-rw-r--r--sound/core/oss/mulaw.c346
-rw-r--r--sound/core/oss/pcm_oss.c3244
-rw-r--r--sound/core/oss/pcm_plugin.c781
-rw-r--r--sound/core/oss/pcm_plugin.h168
-rw-r--r--sound/core/oss/rate.c348
-rw-r--r--sound/core/oss/route.c111
11 files changed, 6885 insertions, 0 deletions
diff --git a/sound/core/oss/Makefile b/sound/core/oss/Makefile
new file mode 100644
index 0000000000..ae25edcc3b
--- /dev/null
+++ b/sound/core/oss/Makefile
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for ALSA
+# Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
+#
+
+snd-mixer-oss-objs := mixer_oss.o
+
+snd-pcm-oss-y := pcm_oss.o
+snd-pcm-oss-$(CONFIG_SND_PCM_OSS_PLUGINS) += pcm_plugin.o \
+ io.o copy.o linear.o mulaw.o route.o rate.o
+
+obj-$(CONFIG_SND_MIXER_OSS) += snd-mixer-oss.o
+obj-$(CONFIG_SND_PCM_OSS) += snd-pcm-oss.o
diff --git a/sound/core/oss/copy.c b/sound/core/oss/copy.c
new file mode 100644
index 0000000000..05b58d4fc2
--- /dev/null
+++ b/sound/core/oss/copy.c
@@ -0,0 +1,92 @@
+/*
+ * Linear conversion Plug-In
+ * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+static snd_pcm_sframes_t copy_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ unsigned int channel;
+ unsigned int nchannels;
+
+ if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+ nchannels = plugin->src_format.channels;
+ for (channel = 0; channel < nchannels; channel++) {
+ if (snd_BUG_ON(src_channels->area.first % 8 ||
+ src_channels->area.step % 8))
+ return -ENXIO;
+ if (snd_BUG_ON(dst_channels->area.first % 8 ||
+ dst_channels->area.step % 8))
+ return -ENXIO;
+ if (!src_channels->enabled) {
+ if (dst_channels->wanted)
+ snd_pcm_area_silence(&dst_channels->area, 0, frames, plugin->dst_format.format);
+ dst_channels->enabled = 0;
+ continue;
+ }
+ dst_channels->enabled = 1;
+ snd_pcm_area_copy(&src_channels->area, 0, &dst_channels->area, 0, frames, plugin->src_format.format);
+ src_channels++;
+ dst_channels++;
+ }
+ return frames;
+}
+
+int snd_pcm_plugin_build_copy(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
+{
+ int err;
+ struct snd_pcm_plugin *plugin;
+ int width;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+
+ if (snd_BUG_ON(src_format->format != dst_format->format))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->rate != dst_format->rate))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->channels != dst_format->channels))
+ return -ENXIO;
+
+ width = snd_pcm_format_physical_width(src_format->format);
+ if (snd_BUG_ON(width <= 0))
+ return -ENXIO;
+
+ err = snd_pcm_plugin_build(plug, "copy", src_format, dst_format,
+ 0, &plugin);
+ if (err < 0)
+ return err;
+ plugin->transfer = copy_transfer;
+ *r_plugin = plugin;
+ return 0;
+}
diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
new file mode 100644
index 0000000000..d870b2d931
--- /dev/null
+++ b/sound/core/oss/io.c
@@ -0,0 +1,141 @@
+/*
+ * PCM I/O Plug-In Interface
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pcm_plugin.h"
+
+#define pcm_write(plug,buf,count) snd_pcm_oss_write3(plug,buf,count,1)
+#define pcm_writev(plug,vec,count) snd_pcm_oss_writev3(plug,vec,count)
+#define pcm_read(plug,buf,count) snd_pcm_oss_read3(plug,buf,count,1)
+#define pcm_readv(plug,vec,count) snd_pcm_oss_readv3(plug,vec,count)
+
+/*
+ * Basic io plugin
+ */
+
+static snd_pcm_sframes_t io_playback_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ if (snd_BUG_ON(!plugin))
+ return -ENXIO;
+ if (snd_BUG_ON(!src_channels))
+ return -ENXIO;
+ if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+ return pcm_write(plugin->plug, src_channels->area.addr, frames);
+ } else {
+ int channel, channels = plugin->dst_format.channels;
+ void **bufs = (void**)plugin->extra_data;
+ if (snd_BUG_ON(!bufs))
+ return -ENXIO;
+ for (channel = 0; channel < channels; channel++) {
+ if (src_channels[channel].enabled)
+ bufs[channel] = src_channels[channel].area.addr;
+ else
+ bufs[channel] = NULL;
+ }
+ return pcm_writev(plugin->plug, bufs, frames);
+ }
+}
+
+static snd_pcm_sframes_t io_capture_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ if (snd_BUG_ON(!plugin))
+ return -ENXIO;
+ if (snd_BUG_ON(!dst_channels))
+ return -ENXIO;
+ if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+ return pcm_read(plugin->plug, dst_channels->area.addr, frames);
+ } else {
+ int channel, channels = plugin->dst_format.channels;
+ void **bufs = (void**)plugin->extra_data;
+ if (snd_BUG_ON(!bufs))
+ return -ENXIO;
+ for (channel = 0; channel < channels; channel++) {
+ if (dst_channels[channel].enabled)
+ bufs[channel] = dst_channels[channel].area.addr;
+ else
+ bufs[channel] = NULL;
+ }
+ return pcm_readv(plugin->plug, bufs, frames);
+ }
+ return 0;
+}
+
+static snd_pcm_sframes_t io_src_channels(struct snd_pcm_plugin *plugin,
+ snd_pcm_uframes_t frames,
+ struct snd_pcm_plugin_channel **channels)
+{
+ int err;
+ unsigned int channel;
+ struct snd_pcm_plugin_channel *v;
+ err = snd_pcm_plugin_client_channels(plugin, frames, &v);
+ if (err < 0)
+ return err;
+ *channels = v;
+ if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+ for (channel = 0; channel < plugin->src_format.channels; ++channel, ++v)
+ v->wanted = 1;
+ }
+ return frames;
+}
+
+int snd_pcm_plugin_build_io(struct snd_pcm_substream *plug,
+ struct snd_pcm_hw_params *params,
+ struct snd_pcm_plugin **r_plugin)
+{
+ int err;
+ struct snd_pcm_plugin_format format;
+ struct snd_pcm_plugin *plugin;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+ if (snd_BUG_ON(!plug || !params))
+ return -ENXIO;
+ format.format = params_format(params);
+ format.rate = params_rate(params);
+ format.channels = params_channels(params);
+ err = snd_pcm_plugin_build(plug, "I/O io",
+ &format, &format,
+ sizeof(void *) * format.channels,
+ &plugin);
+ if (err < 0)
+ return err;
+ plugin->access = params_access(params);
+ if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
+ plugin->transfer = io_playback_transfer;
+ if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
+ plugin->client_channels = io_src_channels;
+ } else {
+ plugin->transfer = io_capture_transfer;
+ }
+
+ *r_plugin = plugin;
+ return 0;
+}
diff --git a/sound/core/oss/linear.c b/sound/core/oss/linear.c
new file mode 100644
index 0000000000..797d838a2f
--- /dev/null
+++ b/sound/core/oss/linear.c
@@ -0,0 +1,180 @@
+/*
+ * Linear conversion Plug-In
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>,
+ * Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+/*
+ * Basic linear conversion plugin
+ */
+
+struct linear_priv {
+ int cvt_endian; /* need endian conversion? */
+ unsigned int src_ofs; /* byte offset in source format */
+ unsigned int dst_ofs; /* byte soffset in destination format */
+ unsigned int copy_ofs; /* byte offset in temporary u32 data */
+ unsigned int dst_bytes; /* byte size of destination format */
+ unsigned int copy_bytes; /* bytes to copy per conversion */
+ unsigned int flip; /* MSB flip for signeness, done after endian conv */
+};
+
+static inline void do_convert(struct linear_priv *data,
+ unsigned char *dst, unsigned char *src)
+{
+ unsigned int tmp = 0;
+ unsigned char *p = (unsigned char *)&tmp;
+
+ memcpy(p + data->copy_ofs, src + data->src_ofs, data->copy_bytes);
+ if (data->cvt_endian)
+ tmp = swab32(tmp);
+ tmp ^= data->flip;
+ memcpy(dst, p + data->dst_ofs, data->dst_bytes);
+}
+
+static void convert(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ struct linear_priv *data = (struct linear_priv *)plugin->extra_data;
+ int channel;
+ int nchannels = plugin->src_format.channels;
+ for (channel = 0; channel < nchannels; ++channel) {
+ char *src;
+ char *dst;
+ int src_step, dst_step;
+ snd_pcm_uframes_t frames1;
+ if (!src_channels[channel].enabled) {
+ if (dst_channels[channel].wanted)
+ snd_pcm_area_silence(&dst_channels[channel].area, 0, frames, plugin->dst_format.format);
+ dst_channels[channel].enabled = 0;
+ continue;
+ }
+ dst_channels[channel].enabled = 1;
+ src = src_channels[channel].area.addr + src_channels[channel].area.first / 8;
+ dst = dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
+ src_step = src_channels[channel].area.step / 8;
+ dst_step = dst_channels[channel].area.step / 8;
+ frames1 = frames;
+ while (frames1-- > 0) {
+ do_convert(data, dst, src);
+ src += src_step;
+ dst += dst_step;
+ }
+ }
+}
+
+static snd_pcm_sframes_t linear_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+#ifdef CONFIG_SND_DEBUG
+ {
+ unsigned int channel;
+ for (channel = 0; channel < plugin->src_format.channels; channel++) {
+ if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+ src_channels[channel].area.step % 8))
+ return -ENXIO;
+ if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+ dst_channels[channel].area.step % 8))
+ return -ENXIO;
+ }
+ }
+#endif
+ if (frames > dst_channels[0].frames)
+ frames = dst_channels[0].frames;
+ convert(plugin, src_channels, dst_channels, frames);
+ return frames;
+}
+
+static void init_data(struct linear_priv *data,
+ snd_pcm_format_t src_format, snd_pcm_format_t dst_format)
+{
+ int src_le, dst_le, src_bytes, dst_bytes;
+
+ src_bytes = snd_pcm_format_width(src_format) / 8;
+ dst_bytes = snd_pcm_format_width(dst_format) / 8;
+ src_le = snd_pcm_format_little_endian(src_format) > 0;
+ dst_le = snd_pcm_format_little_endian(dst_format) > 0;
+
+ data->dst_bytes = dst_bytes;
+ data->cvt_endian = src_le != dst_le;
+ data->copy_bytes = src_bytes < dst_bytes ? src_bytes : dst_bytes;
+ if (src_le) {
+ data->copy_ofs = 4 - data->copy_bytes;
+ data->src_ofs = src_bytes - data->copy_bytes;
+ } else
+ data->src_ofs = snd_pcm_format_physical_width(src_format) / 8 -
+ src_bytes;
+ if (dst_le)
+ data->dst_ofs = 4 - data->dst_bytes;
+ else
+ data->dst_ofs = snd_pcm_format_physical_width(dst_format) / 8 -
+ dst_bytes;
+ if (snd_pcm_format_signed(src_format) !=
+ snd_pcm_format_signed(dst_format)) {
+ if (dst_le)
+ data->flip = (__force u32)cpu_to_le32(0x80000000);
+ else
+ data->flip = (__force u32)cpu_to_be32(0x80000000);
+ }
+}
+
+int snd_pcm_plugin_build_linear(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
+{
+ int err;
+ struct linear_priv *data;
+ struct snd_pcm_plugin *plugin;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+
+ if (snd_BUG_ON(src_format->rate != dst_format->rate))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->channels != dst_format->channels))
+ return -ENXIO;
+ if (snd_BUG_ON(!snd_pcm_format_linear(src_format->format) ||
+ !snd_pcm_format_linear(dst_format->format)))
+ return -ENXIO;
+
+ err = snd_pcm_plugin_build(plug, "linear format conversion",
+ src_format, dst_format,
+ sizeof(struct linear_priv), &plugin);
+ if (err < 0)
+ return err;
+ data = (struct linear_priv *)plugin->extra_data;
+ init_data(data, src_format->format, dst_format->format);
+ plugin->transfer = linear_transfer;
+ *r_plugin = plugin;
+ return 0;
+}
diff --git a/sound/core/oss/mixer_oss.c b/sound/core/oss/mixer_oss.c
new file mode 100644
index 0000000000..dae2da3808
--- /dev/null
+++ b/sound/core/oss/mixer_oss.c
@@ -0,0 +1,1460 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * OSS emulation layer for the mixer interface
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/string.h>
+#include <linux/module.h>
+#include <linux/compat.h>
+#include <sound/core.h>
+#include <sound/minors.h>
+#include <sound/control.h>
+#include <sound/info.h>
+#include <sound/mixer_oss.h>
+#include <linux/soundcard.h>
+
+#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
+MODULE_DESCRIPTION("Mixer OSS emulation for ALSA.");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_MIXER);
+
+static int snd_mixer_oss_open(struct inode *inode, struct file *file)
+{
+ struct snd_card *card;
+ struct snd_mixer_oss_file *fmixer;
+ int err;
+
+ err = nonseekable_open(inode, file);
+ if (err < 0)
+ return err;
+
+ card = snd_lookup_oss_minor_data(iminor(inode),
+ SNDRV_OSS_DEVICE_TYPE_MIXER);
+ if (card == NULL)
+ return -ENODEV;
+ if (card->mixer_oss == NULL) {
+ snd_card_unref(card);
+ return -ENODEV;
+ }
+ err = snd_card_file_add(card, file);
+ if (err < 0) {
+ snd_card_unref(card);
+ return err;
+ }
+ fmixer = kzalloc(sizeof(*fmixer), GFP_KERNEL);
+ if (fmixer == NULL) {
+ snd_card_file_remove(card, file);
+ snd_card_unref(card);
+ return -ENOMEM;
+ }
+ fmixer->card = card;
+ fmixer->mixer = card->mixer_oss;
+ file->private_data = fmixer;
+ if (!try_module_get(card->module)) {
+ kfree(fmixer);
+ snd_card_file_remove(card, file);
+ snd_card_unref(card);
+ return -EFAULT;
+ }
+ snd_card_unref(card);
+ return 0;
+}
+
+static int snd_mixer_oss_release(struct inode *inode, struct file *file)
+{
+ struct snd_mixer_oss_file *fmixer;
+
+ if (file->private_data) {
+ fmixer = file->private_data;
+ module_put(fmixer->card->module);
+ snd_card_file_remove(fmixer->card, file);
+ kfree(fmixer);
+ }
+ return 0;
+}
+
+static int snd_mixer_oss_info(struct snd_mixer_oss_file *fmixer,
+ mixer_info __user *_info)
+{
+ struct snd_card *card = fmixer->card;
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct mixer_info info;
+
+ memset(&info, 0, sizeof(info));
+ strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
+ strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
+ info.modify_counter = card->mixer_oss_change_count;
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int snd_mixer_oss_info_obsolete(struct snd_mixer_oss_file *fmixer,
+ _old_mixer_info __user *_info)
+{
+ struct snd_card *card = fmixer->card;
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ _old_mixer_info info;
+
+ memset(&info, 0, sizeof(info));
+ strscpy(info.id, mixer && mixer->id[0] ? mixer->id : card->driver, sizeof(info.id));
+ strscpy(info.name, mixer && mixer->name[0] ? mixer->name : card->mixername, sizeof(info.name));
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int snd_mixer_oss_caps(struct snd_mixer_oss_file *fmixer)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ int result = 0;
+
+ if (mixer == NULL)
+ return -EIO;
+ if (mixer->get_recsrc && mixer->put_recsrc)
+ result |= SOUND_CAP_EXCL_INPUT;
+ return result;
+}
+
+static int snd_mixer_oss_devmask(struct snd_mixer_oss_file *fmixer)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_mixer_oss_slot *pslot;
+ int result = 0, chn;
+
+ if (mixer == NULL)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->put_volume || pslot->put_recsrc)
+ result |= 1 << chn;
+ }
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_stereodevs(struct snd_mixer_oss_file *fmixer)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_mixer_oss_slot *pslot;
+ int result = 0, chn;
+
+ if (mixer == NULL)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->put_volume && pslot->stereo)
+ result |= 1 << chn;
+ }
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_recmask(struct snd_mixer_oss_file *fmixer)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ int result = 0;
+
+ if (mixer == NULL)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
+ result = mixer->mask_recsrc;
+ } else {
+ struct snd_mixer_oss_slot *pslot;
+ int chn;
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->put_recsrc)
+ result |= 1 << chn;
+ }
+ }
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_get_recsrc(struct snd_mixer_oss_file *fmixer)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ int result = 0;
+
+ if (mixer == NULL)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ if (mixer->put_recsrc && mixer->get_recsrc) { /* exclusive */
+ unsigned int index;
+ result = mixer->get_recsrc(fmixer, &index);
+ if (result < 0)
+ goto unlock;
+ result = 1 << index;
+ } else {
+ struct snd_mixer_oss_slot *pslot;
+ int chn;
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->get_recsrc) {
+ int active = 0;
+ pslot->get_recsrc(fmixer, pslot, &active);
+ if (active)
+ result |= 1 << chn;
+ }
+ }
+ }
+ mixer->oss_recsrc = result;
+ unlock:
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_set_recsrc(struct snd_mixer_oss_file *fmixer, int recsrc)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_mixer_oss_slot *pslot;
+ int chn, active;
+ unsigned int index;
+ int result = 0;
+
+ if (mixer == NULL)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ if (mixer->get_recsrc && mixer->put_recsrc) { /* exclusive input */
+ if (recsrc & ~mixer->oss_recsrc)
+ recsrc &= ~mixer->oss_recsrc;
+ mixer->put_recsrc(fmixer, ffz(~recsrc));
+ mixer->get_recsrc(fmixer, &index);
+ result = 1 << index;
+ }
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->put_recsrc) {
+ active = (recsrc & (1 << chn)) ? 1 : 0;
+ pslot->put_recsrc(fmixer, pslot, active);
+ }
+ }
+ if (! result) {
+ for (chn = 0; chn < 31; chn++) {
+ pslot = &mixer->slots[chn];
+ if (pslot->get_recsrc) {
+ active = 0;
+ pslot->get_recsrc(fmixer, pslot, &active);
+ if (active)
+ result |= 1 << chn;
+ }
+ }
+ }
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_get_volume(struct snd_mixer_oss_file *fmixer, int slot)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_mixer_oss_slot *pslot;
+ int result = 0, left, right;
+
+ if (mixer == NULL || slot > 30)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ pslot = &mixer->slots[slot];
+ left = pslot->volume[0];
+ right = pslot->volume[1];
+ if (pslot->get_volume)
+ result = pslot->get_volume(fmixer, pslot, &left, &right);
+ if (!pslot->stereo)
+ right = left;
+ if (snd_BUG_ON(left < 0 || left > 100)) {
+ result = -EIO;
+ goto unlock;
+ }
+ if (snd_BUG_ON(right < 0 || right > 100)) {
+ result = -EIO;
+ goto unlock;
+ }
+ if (result >= 0) {
+ pslot->volume[0] = left;
+ pslot->volume[1] = right;
+ result = (left & 0xff) | ((right & 0xff) << 8);
+ }
+ unlock:
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_set_volume(struct snd_mixer_oss_file *fmixer,
+ int slot, int volume)
+{
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_mixer_oss_slot *pslot;
+ int result = 0, left = volume & 0xff, right = (volume >> 8) & 0xff;
+
+ if (mixer == NULL || slot > 30)
+ return -EIO;
+ mutex_lock(&mixer->reg_mutex);
+ pslot = &mixer->slots[slot];
+ if (left > 100)
+ left = 100;
+ if (right > 100)
+ right = 100;
+ if (!pslot->stereo)
+ right = left;
+ if (pslot->put_volume)
+ result = pslot->put_volume(fmixer, pslot, left, right);
+ if (result < 0)
+ goto unlock;
+ pslot->volume[0] = left;
+ pslot->volume[1] = right;
+ result = (left & 0xff) | ((right & 0xff) << 8);
+ unlock:
+ mutex_unlock(&mixer->reg_mutex);
+ return result;
+}
+
+static int snd_mixer_oss_ioctl1(struct snd_mixer_oss_file *fmixer, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int __user *p = argp;
+ int tmp;
+
+ if (snd_BUG_ON(!fmixer))
+ return -ENXIO;
+ if (((cmd >> 8) & 0xff) == 'M') {
+ switch (cmd) {
+ case SOUND_MIXER_INFO:
+ return snd_mixer_oss_info(fmixer, argp);
+ case SOUND_OLD_MIXER_INFO:
+ return snd_mixer_oss_info_obsolete(fmixer, argp);
+ case SOUND_MIXER_WRITE_RECSRC:
+ if (get_user(tmp, p))
+ return -EFAULT;
+ tmp = snd_mixer_oss_set_recsrc(fmixer, tmp);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ case OSS_GETVERSION:
+ return put_user(SNDRV_OSS_VERSION, p);
+ case OSS_ALSAEMULVER:
+ return put_user(1, p);
+ case SOUND_MIXER_READ_DEVMASK:
+ tmp = snd_mixer_oss_devmask(fmixer);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ case SOUND_MIXER_READ_STEREODEVS:
+ tmp = snd_mixer_oss_stereodevs(fmixer);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ case SOUND_MIXER_READ_RECMASK:
+ tmp = snd_mixer_oss_recmask(fmixer);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ case SOUND_MIXER_READ_CAPS:
+ tmp = snd_mixer_oss_caps(fmixer);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ case SOUND_MIXER_READ_RECSRC:
+ tmp = snd_mixer_oss_get_recsrc(fmixer);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ }
+ }
+ if (cmd & SIOC_IN) {
+ if (get_user(tmp, p))
+ return -EFAULT;
+ tmp = snd_mixer_oss_set_volume(fmixer, cmd & 0xff, tmp);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ } else if (cmd & SIOC_OUT) {
+ tmp = snd_mixer_oss_get_volume(fmixer, cmd & 0xff);
+ if (tmp < 0)
+ return tmp;
+ return put_user(tmp, p);
+ }
+ return -ENXIO;
+}
+
+static long snd_mixer_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return snd_mixer_oss_ioctl1(file->private_data, cmd, arg);
+}
+
+int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg)
+{
+ struct snd_mixer_oss_file fmixer;
+
+ if (snd_BUG_ON(!card))
+ return -ENXIO;
+ if (card->mixer_oss == NULL)
+ return -ENXIO;
+ memset(&fmixer, 0, sizeof(fmixer));
+ fmixer.card = card;
+ fmixer.mixer = card->mixer_oss;
+ return snd_mixer_oss_ioctl1(&fmixer, cmd, arg);
+}
+EXPORT_SYMBOL(snd_mixer_oss_ioctl_card);
+
+#ifdef CONFIG_COMPAT
+/* all compatible */
+static long snd_mixer_oss_ioctl_compat(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ return snd_mixer_oss_ioctl1(file->private_data, cmd,
+ (unsigned long)compat_ptr(arg));
+}
+#else
+#define snd_mixer_oss_ioctl_compat NULL
+#endif
+
+/*
+ * REGISTRATION PART
+ */
+
+static const struct file_operations snd_mixer_oss_f_ops =
+{
+ .owner = THIS_MODULE,
+ .open = snd_mixer_oss_open,
+ .release = snd_mixer_oss_release,
+ .llseek = no_llseek,
+ .unlocked_ioctl = snd_mixer_oss_ioctl,
+ .compat_ioctl = snd_mixer_oss_ioctl_compat,
+};
+
+/*
+ * utilities
+ */
+
+static long snd_mixer_oss_conv(long val, long omin, long omax, long nmin, long nmax)
+{
+ long orange = omax - omin, nrange = nmax - nmin;
+
+ if (orange == 0)
+ return 0;
+ return DIV_ROUND_CLOSEST(nrange * (val - omin), orange) + nmin;
+}
+
+/* convert from alsa native to oss values (0-100) */
+static long snd_mixer_oss_conv1(long val, long min, long max, int *old)
+{
+ if (val == snd_mixer_oss_conv(*old, 0, 100, min, max))
+ return *old;
+ return snd_mixer_oss_conv(val, min, max, 0, 100);
+}
+
+/* convert from oss to alsa native values */
+static long snd_mixer_oss_conv2(long val, long min, long max)
+{
+ return snd_mixer_oss_conv(val, 0, 100, min, max);
+}
+
+#if 0
+static void snd_mixer_oss_recsrce_set(struct snd_card *card, int slot)
+{
+ struct snd_mixer_oss *mixer = card->mixer_oss;
+ if (mixer)
+ mixer->mask_recsrc |= 1 << slot;
+}
+
+static int snd_mixer_oss_recsrce_get(struct snd_card *card, int slot)
+{
+ struct snd_mixer_oss *mixer = card->mixer_oss;
+ if (mixer && (mixer->mask_recsrc & (1 << slot)))
+ return 1;
+ return 0;
+}
+#endif
+
+#define SNDRV_MIXER_OSS_SIGNATURE 0x65999250
+
+#define SNDRV_MIXER_OSS_ITEM_GLOBAL 0
+#define SNDRV_MIXER_OSS_ITEM_GSWITCH 1
+#define SNDRV_MIXER_OSS_ITEM_GROUTE 2
+#define SNDRV_MIXER_OSS_ITEM_GVOLUME 3
+#define SNDRV_MIXER_OSS_ITEM_PSWITCH 4
+#define SNDRV_MIXER_OSS_ITEM_PROUTE 5
+#define SNDRV_MIXER_OSS_ITEM_PVOLUME 6
+#define SNDRV_MIXER_OSS_ITEM_CSWITCH 7
+#define SNDRV_MIXER_OSS_ITEM_CROUTE 8
+#define SNDRV_MIXER_OSS_ITEM_CVOLUME 9
+#define SNDRV_MIXER_OSS_ITEM_CAPTURE 10
+
+#define SNDRV_MIXER_OSS_ITEM_COUNT 11
+
+#define SNDRV_MIXER_OSS_PRESENT_GLOBAL (1<<0)
+#define SNDRV_MIXER_OSS_PRESENT_GSWITCH (1<<1)
+#define SNDRV_MIXER_OSS_PRESENT_GROUTE (1<<2)
+#define SNDRV_MIXER_OSS_PRESENT_GVOLUME (1<<3)
+#define SNDRV_MIXER_OSS_PRESENT_PSWITCH (1<<4)
+#define SNDRV_MIXER_OSS_PRESENT_PROUTE (1<<5)
+#define SNDRV_MIXER_OSS_PRESENT_PVOLUME (1<<6)
+#define SNDRV_MIXER_OSS_PRESENT_CSWITCH (1<<7)
+#define SNDRV_MIXER_OSS_PRESENT_CROUTE (1<<8)
+#define SNDRV_MIXER_OSS_PRESENT_CVOLUME (1<<9)
+#define SNDRV_MIXER_OSS_PRESENT_CAPTURE (1<<10)
+
+struct slot {
+ unsigned int signature;
+ unsigned int present;
+ unsigned int channels;
+ unsigned int numid[SNDRV_MIXER_OSS_ITEM_COUNT];
+ unsigned int capture_item;
+ const struct snd_mixer_oss_assign_table *assigned;
+ unsigned int allocated: 1;
+};
+
+#define ID_UNKNOWN ((unsigned int)-1)
+
+static struct snd_kcontrol *snd_mixer_oss_test_id(struct snd_mixer_oss *mixer, const char *name, int index)
+{
+ struct snd_card *card = mixer->card;
+ struct snd_ctl_elem_id id;
+
+ memset(&id, 0, sizeof(id));
+ id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+ strscpy(id.name, name, sizeof(id.name));
+ id.index = index;
+ return snd_ctl_find_id_locked(card, &id);
+}
+
+static void snd_mixer_oss_get_volume1_vol(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ unsigned int numid,
+ int *left, int *right)
+{
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ struct snd_kcontrol *kctl;
+ struct snd_card *card = fmixer->card;
+
+ if (numid == ID_UNKNOWN)
+ return;
+ down_read(&card->controls_rwsem);
+ kctl = snd_ctl_find_numid_locked(card, numid);
+ if (!kctl) {
+ up_read(&card->controls_rwsem);
+ return;
+ }
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL)
+ goto __unalloc;
+ if (kctl->info(kctl, uinfo))
+ goto __unalloc;
+ if (kctl->get(kctl, uctl))
+ goto __unalloc;
+ if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
+ uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
+ goto __unalloc;
+ *left = snd_mixer_oss_conv1(uctl->value.integer.value[0], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[0]);
+ if (uinfo->count > 1)
+ *right = snd_mixer_oss_conv1(uctl->value.integer.value[1], uinfo->value.integer.min, uinfo->value.integer.max, &pslot->volume[1]);
+ __unalloc:
+ up_read(&card->controls_rwsem);
+ kfree(uctl);
+ kfree(uinfo);
+}
+
+static void snd_mixer_oss_get_volume1_sw(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ unsigned int numid,
+ int *left, int *right,
+ int route)
+{
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ struct snd_kcontrol *kctl;
+ struct snd_card *card = fmixer->card;
+
+ if (numid == ID_UNKNOWN)
+ return;
+ down_read(&card->controls_rwsem);
+ kctl = snd_ctl_find_numid_locked(card, numid);
+ if (!kctl) {
+ up_read(&card->controls_rwsem);
+ return;
+ }
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL)
+ goto __unalloc;
+ if (kctl->info(kctl, uinfo))
+ goto __unalloc;
+ if (kctl->get(kctl, uctl))
+ goto __unalloc;
+ if (!uctl->value.integer.value[0]) {
+ *left = 0;
+ if (uinfo->count == 1)
+ *right = 0;
+ }
+ if (uinfo->count > 1 && !uctl->value.integer.value[route ? 3 : 1])
+ *right = 0;
+ __unalloc:
+ up_read(&card->controls_rwsem);
+ kfree(uctl);
+ kfree(uinfo);
+}
+
+static int snd_mixer_oss_get_volume1(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int *left, int *right)
+{
+ struct slot *slot = pslot->private_data;
+
+ *left = *right = 100;
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
+ snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
+ snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
+ snd_mixer_oss_get_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
+ }
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
+ }
+ return 0;
+}
+
+static void snd_mixer_oss_put_volume1_vol(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ unsigned int numid,
+ int left, int right)
+{
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ struct snd_kcontrol *kctl;
+ struct snd_card *card = fmixer->card;
+ int res;
+
+ if (numid == ID_UNKNOWN)
+ return;
+ down_read(&card->controls_rwsem);
+ kctl = snd_ctl_find_numid_locked(card, numid);
+ if (!kctl) {
+ up_read(&card->controls_rwsem);
+ return;
+ }
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL)
+ goto __unalloc;
+ if (kctl->info(kctl, uinfo))
+ goto __unalloc;
+ if (uinfo->type == SNDRV_CTL_ELEM_TYPE_BOOLEAN &&
+ uinfo->value.integer.min == 0 && uinfo->value.integer.max == 1)
+ goto __unalloc;
+ uctl->value.integer.value[0] = snd_mixer_oss_conv2(left, uinfo->value.integer.min, uinfo->value.integer.max);
+ if (uinfo->count > 1)
+ uctl->value.integer.value[1] = snd_mixer_oss_conv2(right, uinfo->value.integer.min, uinfo->value.integer.max);
+ res = kctl->put(kctl, uctl);
+ if (res < 0)
+ goto __unalloc;
+ if (res > 0)
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
+ __unalloc:
+ up_read(&card->controls_rwsem);
+ kfree(uctl);
+ kfree(uinfo);
+}
+
+static void snd_mixer_oss_put_volume1_sw(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ unsigned int numid,
+ int left, int right,
+ int route)
+{
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ struct snd_kcontrol *kctl;
+ struct snd_card *card = fmixer->card;
+ int res;
+
+ if (numid == ID_UNKNOWN)
+ return;
+ down_read(&card->controls_rwsem);
+ kctl = snd_ctl_find_numid_locked(card, numid);
+ if (!kctl) {
+ up_read(&card->controls_rwsem);
+ return;
+ }
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL)
+ goto __unalloc;
+ if (kctl->info(kctl, uinfo))
+ goto __unalloc;
+ if (uinfo->count > 1) {
+ uctl->value.integer.value[0] = left > 0 ? 1 : 0;
+ uctl->value.integer.value[route ? 3 : 1] = right > 0 ? 1 : 0;
+ if (route) {
+ uctl->value.integer.value[1] =
+ uctl->value.integer.value[2] = 0;
+ }
+ } else {
+ uctl->value.integer.value[0] = (left > 0 || right > 0) ? 1 : 0;
+ }
+ res = kctl->put(kctl, uctl);
+ if (res < 0)
+ goto __unalloc;
+ if (res > 0)
+ snd_ctl_notify(card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
+ __unalloc:
+ up_read(&card->controls_rwsem);
+ kfree(uctl);
+ kfree(uinfo);
+}
+
+static int snd_mixer_oss_put_volume1(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int left, int right)
+{
+ struct slot *slot = pslot->private_data;
+
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PVOLUME) {
+ snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PVOLUME], left, right);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME)
+ snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CVOLUME) {
+ snd_mixer_oss_put_volume1_vol(fmixer, pslot,
+ slot->numid[SNDRV_MIXER_OSS_ITEM_CVOLUME], left, right);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GVOLUME) {
+ snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GVOLUME], left, right);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GLOBAL) {
+ snd_mixer_oss_put_volume1_vol(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GLOBAL], left, right);
+ }
+ if (left || right) {
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE)
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
+ } else {
+ if (slot->present & SNDRV_MIXER_OSS_PRESENT_PSWITCH) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PSWITCH], left, right, 0);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], left, right, 0);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GSWITCH) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GSWITCH], left, right, 0);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_PROUTE) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_PROUTE], left, right, 1);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], left, right, 1);
+ } else if (slot->present & SNDRV_MIXER_OSS_PRESENT_GROUTE) {
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_GROUTE], left, right, 1);
+ }
+ }
+ return 0;
+}
+
+static int snd_mixer_oss_get_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int *active)
+{
+ struct slot *slot = pslot->private_data;
+ int left, right;
+
+ left = right = 1;
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], &left, &right, 0);
+ *active = (left || right) ? 1 : 0;
+ return 0;
+}
+
+static int snd_mixer_oss_get_recsrc1_route(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int *active)
+{
+ struct slot *slot = pslot->private_data;
+ int left, right;
+
+ left = right = 1;
+ snd_mixer_oss_get_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], &left, &right, 1);
+ *active = (left || right) ? 1 : 0;
+ return 0;
+}
+
+static int snd_mixer_oss_put_recsrc1_sw(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int active)
+{
+ struct slot *slot = pslot->private_data;
+
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CSWITCH], active, active, 0);
+ return 0;
+}
+
+static int snd_mixer_oss_put_recsrc1_route(struct snd_mixer_oss_file *fmixer,
+ struct snd_mixer_oss_slot *pslot,
+ int active)
+{
+ struct slot *slot = pslot->private_data;
+
+ snd_mixer_oss_put_volume1_sw(fmixer, pslot, slot->numid[SNDRV_MIXER_OSS_ITEM_CROUTE], active, active, 1);
+ return 0;
+}
+
+static int snd_mixer_oss_get_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int *active_index)
+{
+ struct snd_card *card = fmixer->card;
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_kcontrol *kctl;
+ struct snd_mixer_oss_slot *pslot;
+ struct slot *slot;
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ int err, idx;
+
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL) {
+ err = -ENOMEM;
+ goto __free_only;
+ }
+ down_read(&card->controls_rwsem);
+ kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
+ if (! kctl) {
+ err = -ENOENT;
+ goto __unlock;
+ }
+ err = kctl->info(kctl, uinfo);
+ if (err < 0)
+ goto __unlock;
+ err = kctl->get(kctl, uctl);
+ if (err < 0)
+ goto __unlock;
+ for (idx = 0; idx < 32; idx++) {
+ if (!(mixer->mask_recsrc & (1 << idx)))
+ continue;
+ pslot = &mixer->slots[idx];
+ slot = pslot->private_data;
+ if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
+ continue;
+ if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
+ continue;
+ if (slot->capture_item == uctl->value.enumerated.item[0]) {
+ *active_index = idx;
+ break;
+ }
+ }
+ err = 0;
+ __unlock:
+ up_read(&card->controls_rwsem);
+ __free_only:
+ kfree(uctl);
+ kfree(uinfo);
+ return err;
+}
+
+static int snd_mixer_oss_put_recsrc2(struct snd_mixer_oss_file *fmixer, unsigned int active_index)
+{
+ struct snd_card *card = fmixer->card;
+ struct snd_mixer_oss *mixer = fmixer->mixer;
+ struct snd_kcontrol *kctl;
+ struct snd_mixer_oss_slot *pslot;
+ struct slot *slot = NULL;
+ struct snd_ctl_elem_info *uinfo;
+ struct snd_ctl_elem_value *uctl;
+ int err;
+ unsigned int idx;
+
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ uctl = kzalloc(sizeof(*uctl), GFP_KERNEL);
+ if (uinfo == NULL || uctl == NULL) {
+ err = -ENOMEM;
+ goto __free_only;
+ }
+ down_read(&card->controls_rwsem);
+ kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
+ if (! kctl) {
+ err = -ENOENT;
+ goto __unlock;
+ }
+ err = kctl->info(kctl, uinfo);
+ if (err < 0)
+ goto __unlock;
+ for (idx = 0; idx < 32; idx++) {
+ if (!(mixer->mask_recsrc & (1 << idx)))
+ continue;
+ pslot = &mixer->slots[idx];
+ slot = pslot->private_data;
+ if (slot->signature != SNDRV_MIXER_OSS_SIGNATURE)
+ continue;
+ if (!(slot->present & SNDRV_MIXER_OSS_PRESENT_CAPTURE))
+ continue;
+ if (idx == active_index)
+ break;
+ slot = NULL;
+ }
+ if (! slot)
+ goto __unlock;
+ for (idx = 0; idx < uinfo->count; idx++)
+ uctl->value.enumerated.item[idx] = slot->capture_item;
+ err = kctl->put(kctl, uctl);
+ if (err > 0)
+ snd_ctl_notify(fmixer->card, SNDRV_CTL_EVENT_MASK_VALUE, &kctl->id);
+ err = 0;
+ __unlock:
+ up_read(&card->controls_rwsem);
+ __free_only:
+ kfree(uctl);
+ kfree(uinfo);
+ return err;
+}
+
+struct snd_mixer_oss_assign_table {
+ int oss_id;
+ const char *name;
+ int index;
+};
+
+static int snd_mixer_oss_build_test(struct snd_mixer_oss *mixer, struct slot *slot, const char *name, int index, int item)
+{
+ struct snd_ctl_elem_info *info;
+ struct snd_kcontrol *kcontrol;
+ struct snd_card *card = mixer->card;
+ int err;
+
+ down_read(&card->controls_rwsem);
+ kcontrol = snd_mixer_oss_test_id(mixer, name, index);
+ if (kcontrol == NULL) {
+ up_read(&card->controls_rwsem);
+ return 0;
+ }
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (! info) {
+ up_read(&card->controls_rwsem);
+ return -ENOMEM;
+ }
+ err = kcontrol->info(kcontrol, info);
+ if (err < 0) {
+ up_read(&card->controls_rwsem);
+ kfree(info);
+ return err;
+ }
+ slot->numid[item] = kcontrol->id.numid;
+ up_read(&card->controls_rwsem);
+ if (info->count > slot->channels)
+ slot->channels = info->count;
+ slot->present |= 1 << item;
+ kfree(info);
+ return 0;
+}
+
+static void snd_mixer_oss_slot_free(struct snd_mixer_oss_slot *chn)
+{
+ struct slot *p = chn->private_data;
+ if (p) {
+ if (p->allocated && p->assigned) {
+ kfree_const(p->assigned->name);
+ kfree_const(p->assigned);
+ }
+ kfree(p);
+ }
+}
+
+static void mixer_slot_clear(struct snd_mixer_oss_slot *rslot)
+{
+ int idx = rslot->number; /* remember this */
+ if (rslot->private_free)
+ rslot->private_free(rslot);
+ memset(rslot, 0, sizeof(*rslot));
+ rslot->number = idx;
+}
+
+/* In a separate function to keep gcc 3.2 happy - do NOT merge this in
+ snd_mixer_oss_build_input! */
+static int snd_mixer_oss_build_test_all(struct snd_mixer_oss *mixer,
+ const struct snd_mixer_oss_assign_table *ptr,
+ struct slot *slot)
+{
+ char str[64];
+ int err;
+
+ err = snd_mixer_oss_build_test(mixer, slot, ptr->name, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_GLOBAL);
+ if (err)
+ return err;
+ sprintf(str, "%s Switch", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_GSWITCH);
+ if (err)
+ return err;
+ sprintf(str, "%s Route", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_GROUTE);
+ if (err)
+ return err;
+ sprintf(str, "%s Volume", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_GVOLUME);
+ if (err)
+ return err;
+ sprintf(str, "%s Playback Switch", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_PSWITCH);
+ if (err)
+ return err;
+ sprintf(str, "%s Playback Route", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_PROUTE);
+ if (err)
+ return err;
+ sprintf(str, "%s Playback Volume", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_PVOLUME);
+ if (err)
+ return err;
+ sprintf(str, "%s Capture Switch", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_CSWITCH);
+ if (err)
+ return err;
+ sprintf(str, "%s Capture Route", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_CROUTE);
+ if (err)
+ return err;
+ sprintf(str, "%s Capture Volume", ptr->name);
+ err = snd_mixer_oss_build_test(mixer, slot, str, ptr->index,
+ SNDRV_MIXER_OSS_ITEM_CVOLUME);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/*
+ * build an OSS mixer element.
+ * ptr_allocated means the entry is dynamically allocated (change via proc file).
+ * when replace_old = 1, the old entry is replaced with the new one.
+ */
+static int snd_mixer_oss_build_input(struct snd_mixer_oss *mixer,
+ const struct snd_mixer_oss_assign_table *ptr,
+ int ptr_allocated, int replace_old)
+{
+ struct slot slot;
+ struct slot *pslot;
+ struct snd_kcontrol *kctl;
+ struct snd_mixer_oss_slot *rslot;
+ char str[64];
+
+ /* check if already assigned */
+ if (mixer->slots[ptr->oss_id].get_volume && ! replace_old)
+ return 0;
+
+ memset(&slot, 0, sizeof(slot));
+ memset(slot.numid, 0xff, sizeof(slot.numid)); /* ID_UNKNOWN */
+ if (snd_mixer_oss_build_test_all(mixer, ptr, &slot))
+ return 0;
+ down_read(&mixer->card->controls_rwsem);
+ kctl = NULL;
+ if (!ptr->index)
+ kctl = snd_mixer_oss_test_id(mixer, "Capture Source", 0);
+ if (kctl) {
+ struct snd_ctl_elem_info *uinfo;
+
+ uinfo = kzalloc(sizeof(*uinfo), GFP_KERNEL);
+ if (! uinfo) {
+ up_read(&mixer->card->controls_rwsem);
+ return -ENOMEM;
+ }
+
+ if (kctl->info(kctl, uinfo)) {
+ up_read(&mixer->card->controls_rwsem);
+ kfree(uinfo);
+ return 0;
+ }
+ strcpy(str, ptr->name);
+ if (!strcmp(str, "Master"))
+ strcpy(str, "Mix");
+ if (!strcmp(str, "Master Mono"))
+ strcpy(str, "Mix Mono");
+ slot.capture_item = 0;
+ if (!strcmp(uinfo->value.enumerated.name, str)) {
+ slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
+ } else {
+ for (slot.capture_item = 1; slot.capture_item < uinfo->value.enumerated.items; slot.capture_item++) {
+ uinfo->value.enumerated.item = slot.capture_item;
+ if (kctl->info(kctl, uinfo)) {
+ up_read(&mixer->card->controls_rwsem);
+ kfree(uinfo);
+ return 0;
+ }
+ if (!strcmp(uinfo->value.enumerated.name, str)) {
+ slot.present |= SNDRV_MIXER_OSS_PRESENT_CAPTURE;
+ break;
+ }
+ }
+ }
+ kfree(uinfo);
+ }
+ up_read(&mixer->card->controls_rwsem);
+ if (slot.present != 0) {
+ pslot = kmalloc(sizeof(slot), GFP_KERNEL);
+ if (! pslot)
+ return -ENOMEM;
+ *pslot = slot;
+ pslot->signature = SNDRV_MIXER_OSS_SIGNATURE;
+ pslot->assigned = ptr;
+ pslot->allocated = ptr_allocated;
+ rslot = &mixer->slots[ptr->oss_id];
+ mixer_slot_clear(rslot);
+ rslot->stereo = slot.channels > 1 ? 1 : 0;
+ rslot->get_volume = snd_mixer_oss_get_volume1;
+ rslot->put_volume = snd_mixer_oss_put_volume1;
+ /* note: ES18xx have both Capture Source and XX Capture Volume !!! */
+ if (slot.present & SNDRV_MIXER_OSS_PRESENT_CSWITCH) {
+ rslot->get_recsrc = snd_mixer_oss_get_recsrc1_sw;
+ rslot->put_recsrc = snd_mixer_oss_put_recsrc1_sw;
+ } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CROUTE) {
+ rslot->get_recsrc = snd_mixer_oss_get_recsrc1_route;
+ rslot->put_recsrc = snd_mixer_oss_put_recsrc1_route;
+ } else if (slot.present & SNDRV_MIXER_OSS_PRESENT_CAPTURE) {
+ mixer->mask_recsrc |= 1 << ptr->oss_id;
+ }
+ rslot->private_data = pslot;
+ rslot->private_free = snd_mixer_oss_slot_free;
+ return 1;
+ }
+ return 0;
+}
+
+#ifdef CONFIG_SND_PROC_FS
+/*
+ */
+#define MIXER_VOL(name) [SOUND_MIXER_##name] = #name
+static const char * const oss_mixer_names[SNDRV_OSS_MAX_MIXERS] = {
+ MIXER_VOL(VOLUME),
+ MIXER_VOL(BASS),
+ MIXER_VOL(TREBLE),
+ MIXER_VOL(SYNTH),
+ MIXER_VOL(PCM),
+ MIXER_VOL(SPEAKER),
+ MIXER_VOL(LINE),
+ MIXER_VOL(MIC),
+ MIXER_VOL(CD),
+ MIXER_VOL(IMIX),
+ MIXER_VOL(ALTPCM),
+ MIXER_VOL(RECLEV),
+ MIXER_VOL(IGAIN),
+ MIXER_VOL(OGAIN),
+ MIXER_VOL(LINE1),
+ MIXER_VOL(LINE2),
+ MIXER_VOL(LINE3),
+ MIXER_VOL(DIGITAL1),
+ MIXER_VOL(DIGITAL2),
+ MIXER_VOL(DIGITAL3),
+ MIXER_VOL(PHONEIN),
+ MIXER_VOL(PHONEOUT),
+ MIXER_VOL(VIDEO),
+ MIXER_VOL(RADIO),
+ MIXER_VOL(MONITOR),
+};
+
+/*
+ * /proc interface
+ */
+
+static void snd_mixer_oss_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_mixer_oss *mixer = entry->private_data;
+ int i;
+
+ mutex_lock(&mixer->reg_mutex);
+ for (i = 0; i < SNDRV_OSS_MAX_MIXERS; i++) {
+ struct slot *p;
+
+ if (! oss_mixer_names[i])
+ continue;
+ p = (struct slot *)mixer->slots[i].private_data;
+ snd_iprintf(buffer, "%s ", oss_mixer_names[i]);
+ if (p && p->assigned)
+ snd_iprintf(buffer, "\"%s\" %d\n",
+ p->assigned->name,
+ p->assigned->index);
+ else
+ snd_iprintf(buffer, "\"\" 0\n");
+ }
+ mutex_unlock(&mixer->reg_mutex);
+}
+
+static void snd_mixer_oss_proc_write(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_mixer_oss *mixer = entry->private_data;
+ char line[128], str[32], idxstr[16];
+ const char *cptr;
+ unsigned int idx;
+ int ch;
+ struct snd_mixer_oss_assign_table *tbl;
+ struct slot *slot;
+
+ while (!snd_info_get_line(buffer, line, sizeof(line))) {
+ cptr = snd_info_get_str(str, line, sizeof(str));
+ for (ch = 0; ch < SNDRV_OSS_MAX_MIXERS; ch++)
+ if (oss_mixer_names[ch] && strcmp(oss_mixer_names[ch], str) == 0)
+ break;
+ if (ch >= SNDRV_OSS_MAX_MIXERS) {
+ pr_err("ALSA: mixer_oss: invalid OSS volume '%s'\n",
+ str);
+ continue;
+ }
+ cptr = snd_info_get_str(str, cptr, sizeof(str));
+ if (! *str) {
+ /* remove the entry */
+ mutex_lock(&mixer->reg_mutex);
+ mixer_slot_clear(&mixer->slots[ch]);
+ mutex_unlock(&mixer->reg_mutex);
+ continue;
+ }
+ snd_info_get_str(idxstr, cptr, sizeof(idxstr));
+ idx = simple_strtoul(idxstr, NULL, 10);
+ if (idx >= 0x4000) { /* too big */
+ pr_err("ALSA: mixer_oss: invalid index %d\n", idx);
+ continue;
+ }
+ mutex_lock(&mixer->reg_mutex);
+ slot = (struct slot *)mixer->slots[ch].private_data;
+ if (slot && slot->assigned &&
+ slot->assigned->index == idx && ! strcmp(slot->assigned->name, str))
+ /* not changed */
+ goto __unlock;
+ tbl = kmalloc(sizeof(*tbl), GFP_KERNEL);
+ if (!tbl)
+ goto __unlock;
+ tbl->oss_id = ch;
+ tbl->name = kstrdup(str, GFP_KERNEL);
+ if (! tbl->name) {
+ kfree(tbl);
+ goto __unlock;
+ }
+ tbl->index = idx;
+ if (snd_mixer_oss_build_input(mixer, tbl, 1, 1) <= 0) {
+ kfree(tbl->name);
+ kfree(tbl);
+ }
+ __unlock:
+ mutex_unlock(&mixer->reg_mutex);
+ }
+}
+
+static void snd_mixer_oss_proc_init(struct snd_mixer_oss *mixer)
+{
+ struct snd_info_entry *entry;
+
+ entry = snd_info_create_card_entry(mixer->card, "oss_mixer",
+ mixer->card->proc_root);
+ if (! entry)
+ return;
+ entry->content = SNDRV_INFO_CONTENT_TEXT;
+ entry->mode = S_IFREG | 0644;
+ entry->c.text.read = snd_mixer_oss_proc_read;
+ entry->c.text.write = snd_mixer_oss_proc_write;
+ entry->private_data = mixer;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ mixer->proc_entry = entry;
+}
+
+static void snd_mixer_oss_proc_done(struct snd_mixer_oss *mixer)
+{
+ snd_info_free_entry(mixer->proc_entry);
+ mixer->proc_entry = NULL;
+}
+#else /* !CONFIG_SND_PROC_FS */
+#define snd_mixer_oss_proc_init(mix)
+#define snd_mixer_oss_proc_done(mix)
+#endif /* CONFIG_SND_PROC_FS */
+
+static void snd_mixer_oss_build(struct snd_mixer_oss *mixer)
+{
+ static const struct snd_mixer_oss_assign_table table[] = {
+ { SOUND_MIXER_VOLUME, "Master", 0 },
+ { SOUND_MIXER_VOLUME, "Front", 0 }, /* fallback */
+ { SOUND_MIXER_BASS, "Tone Control - Bass", 0 },
+ { SOUND_MIXER_TREBLE, "Tone Control - Treble", 0 },
+ { SOUND_MIXER_SYNTH, "Synth", 0 },
+ { SOUND_MIXER_SYNTH, "FM", 0 }, /* fallback */
+ { SOUND_MIXER_SYNTH, "Music", 0 }, /* fallback */
+ { SOUND_MIXER_PCM, "PCM", 0 },
+ { SOUND_MIXER_SPEAKER, "Beep", 0 },
+ { SOUND_MIXER_SPEAKER, "PC Speaker", 0 }, /* fallback */
+ { SOUND_MIXER_SPEAKER, "Speaker", 0 }, /* fallback */
+ { SOUND_MIXER_LINE, "Line", 0 },
+ { SOUND_MIXER_MIC, "Mic", 0 },
+ { SOUND_MIXER_CD, "CD", 0 },
+ { SOUND_MIXER_IMIX, "Monitor Mix", 0 },
+ { SOUND_MIXER_ALTPCM, "PCM", 1 },
+ { SOUND_MIXER_ALTPCM, "Headphone", 0 }, /* fallback */
+ { SOUND_MIXER_ALTPCM, "Wave", 0 }, /* fallback */
+ { SOUND_MIXER_RECLEV, "-- nothing --", 0 },
+ { SOUND_MIXER_IGAIN, "Capture", 0 },
+ { SOUND_MIXER_OGAIN, "Playback", 0 },
+ { SOUND_MIXER_LINE1, "Aux", 0 },
+ { SOUND_MIXER_LINE2, "Aux", 1 },
+ { SOUND_MIXER_LINE3, "Aux", 2 },
+ { SOUND_MIXER_DIGITAL1, "Digital", 0 },
+ { SOUND_MIXER_DIGITAL1, "IEC958", 0 }, /* fallback */
+ { SOUND_MIXER_DIGITAL1, "IEC958 Optical", 0 }, /* fallback */
+ { SOUND_MIXER_DIGITAL1, "IEC958 Coaxial", 0 }, /* fallback */
+ { SOUND_MIXER_DIGITAL2, "Digital", 1 },
+ { SOUND_MIXER_DIGITAL3, "Digital", 2 },
+ { SOUND_MIXER_PHONEIN, "Phone", 0 },
+ { SOUND_MIXER_PHONEOUT, "Master Mono", 0 },
+ { SOUND_MIXER_PHONEOUT, "Speaker", 0 }, /*fallback*/
+ { SOUND_MIXER_PHONEOUT, "Mono", 0 }, /*fallback*/
+ { SOUND_MIXER_PHONEOUT, "Phone", 0 }, /* fallback */
+ { SOUND_MIXER_VIDEO, "Video", 0 },
+ { SOUND_MIXER_RADIO, "Radio", 0 },
+ { SOUND_MIXER_MONITOR, "Monitor", 0 }
+ };
+ unsigned int idx;
+
+ for (idx = 0; idx < ARRAY_SIZE(table); idx++)
+ snd_mixer_oss_build_input(mixer, &table[idx], 0, 0);
+ if (mixer->mask_recsrc) {
+ mixer->get_recsrc = snd_mixer_oss_get_recsrc2;
+ mixer->put_recsrc = snd_mixer_oss_put_recsrc2;
+ }
+}
+
+/*
+ *
+ */
+
+static int snd_mixer_oss_free1(void *private)
+{
+ struct snd_mixer_oss *mixer = private;
+ struct snd_card *card;
+ int idx;
+
+ if (!mixer)
+ return 0;
+ card = mixer->card;
+ if (snd_BUG_ON(mixer != card->mixer_oss))
+ return -ENXIO;
+ card->mixer_oss = NULL;
+ for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++) {
+ struct snd_mixer_oss_slot *chn = &mixer->slots[idx];
+ if (chn->private_free)
+ chn->private_free(chn);
+ }
+ kfree(mixer);
+ return 0;
+}
+
+static int snd_mixer_oss_notify_handler(struct snd_card *card, int cmd)
+{
+ struct snd_mixer_oss *mixer;
+
+ if (cmd == SND_MIXER_OSS_NOTIFY_REGISTER) {
+ int idx, err;
+
+ mixer = kcalloc(2, sizeof(*mixer), GFP_KERNEL);
+ if (mixer == NULL)
+ return -ENOMEM;
+ mutex_init(&mixer->reg_mutex);
+ err = snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER,
+ card, 0,
+ &snd_mixer_oss_f_ops, card);
+ if (err < 0) {
+ dev_err(card->dev,
+ "unable to register OSS mixer device %i:%i\n",
+ card->number, 0);
+ kfree(mixer);
+ return err;
+ }
+ mixer->oss_dev_alloc = 1;
+ mixer->card = card;
+ if (*card->mixername)
+ strscpy(mixer->name, card->mixername, sizeof(mixer->name));
+ else
+ snprintf(mixer->name, sizeof(mixer->name),
+ "mixer%i", card->number);
+#ifdef SNDRV_OSS_INFO_DEV_MIXERS
+ snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIXERS,
+ card->number,
+ mixer->name);
+#endif
+ for (idx = 0; idx < SNDRV_OSS_MAX_MIXERS; idx++)
+ mixer->slots[idx].number = idx;
+ card->mixer_oss = mixer;
+ snd_mixer_oss_build(mixer);
+ snd_mixer_oss_proc_init(mixer);
+ } else {
+ mixer = card->mixer_oss;
+ if (mixer == NULL)
+ return 0;
+ if (mixer->oss_dev_alloc) {
+#ifdef SNDRV_OSS_INFO_DEV_MIXERS
+ snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIXERS, mixer->card->number);
+#endif
+ snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIXER, mixer->card, 0);
+ mixer->oss_dev_alloc = 0;
+ }
+ if (cmd == SND_MIXER_OSS_NOTIFY_DISCONNECT)
+ return 0;
+ snd_mixer_oss_proc_done(mixer);
+ return snd_mixer_oss_free1(mixer);
+ }
+ return 0;
+}
+
+static int __init alsa_mixer_oss_init(void)
+{
+ struct snd_card *card;
+ int idx;
+
+ snd_mixer_oss_notify_callback = snd_mixer_oss_notify_handler;
+ for (idx = 0; idx < SNDRV_CARDS; idx++) {
+ card = snd_card_ref(idx);
+ if (card) {
+ snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_REGISTER);
+ snd_card_unref(card);
+ }
+ }
+ return 0;
+}
+
+static void __exit alsa_mixer_oss_exit(void)
+{
+ struct snd_card *card;
+ int idx;
+
+ snd_mixer_oss_notify_callback = NULL;
+ for (idx = 0; idx < SNDRV_CARDS; idx++) {
+ card = snd_card_ref(idx);
+ if (card) {
+ snd_mixer_oss_notify_handler(card, SND_MIXER_OSS_NOTIFY_FREE);
+ snd_card_unref(card);
+ }
+ }
+}
+
+module_init(alsa_mixer_oss_init)
+module_exit(alsa_mixer_oss_exit)
diff --git a/sound/core/oss/mulaw.c b/sound/core/oss/mulaw.c
new file mode 100644
index 0000000000..fe27034f28
--- /dev/null
+++ b/sound/core/oss/mulaw.c
@@ -0,0 +1,346 @@
+/*
+ * Mu-Law conversion Plug-In Interface
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
+ * Uros Bizjak <uros@kss-loka.si>
+ *
+ * Based on reference implementation by Sun Microsystems, Inc.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+#define SIGN_BIT (0x80) /* Sign bit for a u-law byte. */
+#define QUANT_MASK (0xf) /* Quantization field mask. */
+#define NSEGS (8) /* Number of u-law segments. */
+#define SEG_SHIFT (4) /* Left shift for segment number. */
+#define SEG_MASK (0x70) /* Segment field mask. */
+
+static inline int val_seg(int val)
+{
+ int r = 0;
+ val >>= 7;
+ if (val & 0xf0) {
+ val >>= 4;
+ r += 4;
+ }
+ if (val & 0x0c) {
+ val >>= 2;
+ r += 2;
+ }
+ if (val & 0x02)
+ r += 1;
+ return r;
+}
+
+#define BIAS (0x84) /* Bias for linear code. */
+
+/*
+ * linear2ulaw() - Convert a linear PCM value to u-law
+ *
+ * In order to simplify the encoding process, the original linear magnitude
+ * is biased by adding 33 which shifts the encoding range from (0 - 8158) to
+ * (33 - 8191). The result can be seen in the following encoding table:
+ *
+ * Biased Linear Input Code Compressed Code
+ * ------------------------ ---------------
+ * 00000001wxyza 000wxyz
+ * 0000001wxyzab 001wxyz
+ * 000001wxyzabc 010wxyz
+ * 00001wxyzabcd 011wxyz
+ * 0001wxyzabcde 100wxyz
+ * 001wxyzabcdef 101wxyz
+ * 01wxyzabcdefg 110wxyz
+ * 1wxyzabcdefgh 111wxyz
+ *
+ * Each biased linear code has a leading 1 which identifies the segment
+ * number. The value of the segment number is equal to 7 minus the number
+ * of leading 0's. The quantization interval is directly available as the
+ * four bits wxyz. * The trailing bits (a - h) are ignored.
+ *
+ * Ordinarily the complement of the resulting code word is used for
+ * transmission, and so the code word is complemented before it is returned.
+ *
+ * For further information see John C. Bellamy's Digital Telephony, 1982,
+ * John Wiley & Sons, pps 98-111 and 472-476.
+ */
+static unsigned char linear2ulaw(int pcm_val) /* 2's complement (16-bit range) */
+{
+ int mask;
+ int seg;
+ unsigned char uval;
+
+ /* Get the sign and the magnitude of the value. */
+ if (pcm_val < 0) {
+ pcm_val = BIAS - pcm_val;
+ mask = 0x7F;
+ } else {
+ pcm_val += BIAS;
+ mask = 0xFF;
+ }
+ if (pcm_val > 0x7FFF)
+ pcm_val = 0x7FFF;
+
+ /* Convert the scaled magnitude to segment number. */
+ seg = val_seg(pcm_val);
+
+ /*
+ * Combine the sign, segment, quantization bits;
+ * and complement the code word.
+ */
+ uval = (seg << 4) | ((pcm_val >> (seg + 3)) & 0xF);
+ return uval ^ mask;
+}
+
+/*
+ * ulaw2linear() - Convert a u-law value to 16-bit linear PCM
+ *
+ * First, a biased linear code is derived from the code word. An unbiased
+ * output can then be obtained by subtracting 33 from the biased code.
+ *
+ * Note that this function expects to be passed the complement of the
+ * original code word. This is in keeping with ISDN conventions.
+ */
+static int ulaw2linear(unsigned char u_val)
+{
+ int t;
+
+ /* Complement to obtain normal u-law value. */
+ u_val = ~u_val;
+
+ /*
+ * Extract and bias the quantization bits. Then
+ * shift up by the segment number and subtract out the bias.
+ */
+ t = ((u_val & QUANT_MASK) << 3) + BIAS;
+ t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
+
+ return ((u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS));
+}
+
+/*
+ * Basic Mu-Law plugin
+ */
+
+typedef void (*mulaw_f)(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames);
+
+struct mulaw_priv {
+ mulaw_f func;
+ int cvt_endian; /* need endian conversion? */
+ unsigned int native_ofs; /* byte offset in native format */
+ unsigned int copy_ofs; /* byte offset in s16 format */
+ unsigned int native_bytes; /* byte size of the native format */
+ unsigned int copy_bytes; /* bytes to copy per conversion */
+ u16 flip; /* MSB flip for signedness, done after endian conversion */
+};
+
+static inline void cvt_s16_to_native(struct mulaw_priv *data,
+ unsigned char *dst, u16 sample)
+{
+ sample ^= data->flip;
+ if (data->cvt_endian)
+ sample = swab16(sample);
+ if (data->native_bytes > data->copy_bytes)
+ memset(dst, 0, data->native_bytes);
+ memcpy(dst + data->native_ofs, (char *)&sample + data->copy_ofs,
+ data->copy_bytes);
+}
+
+static void mulaw_decode(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ struct mulaw_priv *data = (struct mulaw_priv *)plugin->extra_data;
+ int channel;
+ int nchannels = plugin->src_format.channels;
+ for (channel = 0; channel < nchannels; ++channel) {
+ char *src;
+ char *dst;
+ int src_step, dst_step;
+ snd_pcm_uframes_t frames1;
+ if (!src_channels[channel].enabled) {
+ if (dst_channels[channel].wanted)
+ snd_pcm_area_silence(&dst_channels[channel].area, 0, frames, plugin->dst_format.format);
+ dst_channels[channel].enabled = 0;
+ continue;
+ }
+ dst_channels[channel].enabled = 1;
+ src = src_channels[channel].area.addr + src_channels[channel].area.first / 8;
+ dst = dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
+ src_step = src_channels[channel].area.step / 8;
+ dst_step = dst_channels[channel].area.step / 8;
+ frames1 = frames;
+ while (frames1-- > 0) {
+ signed short sample = ulaw2linear(*src);
+ cvt_s16_to_native(data, dst, sample);
+ src += src_step;
+ dst += dst_step;
+ }
+ }
+}
+
+static inline signed short cvt_native_to_s16(struct mulaw_priv *data,
+ unsigned char *src)
+{
+ u16 sample = 0;
+ memcpy((char *)&sample + data->copy_ofs, src + data->native_ofs,
+ data->copy_bytes);
+ if (data->cvt_endian)
+ sample = swab16(sample);
+ sample ^= data->flip;
+ return (signed short)sample;
+}
+
+static void mulaw_encode(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ struct mulaw_priv *data = (struct mulaw_priv *)plugin->extra_data;
+ int channel;
+ int nchannels = plugin->src_format.channels;
+ for (channel = 0; channel < nchannels; ++channel) {
+ char *src;
+ char *dst;
+ int src_step, dst_step;
+ snd_pcm_uframes_t frames1;
+ if (!src_channels[channel].enabled) {
+ if (dst_channels[channel].wanted)
+ snd_pcm_area_silence(&dst_channels[channel].area, 0, frames, plugin->dst_format.format);
+ dst_channels[channel].enabled = 0;
+ continue;
+ }
+ dst_channels[channel].enabled = 1;
+ src = src_channels[channel].area.addr + src_channels[channel].area.first / 8;
+ dst = dst_channels[channel].area.addr + dst_channels[channel].area.first / 8;
+ src_step = src_channels[channel].area.step / 8;
+ dst_step = dst_channels[channel].area.step / 8;
+ frames1 = frames;
+ while (frames1-- > 0) {
+ signed short sample = cvt_native_to_s16(data, src);
+ *dst = linear2ulaw(sample);
+ src += src_step;
+ dst += dst_step;
+ }
+ }
+}
+
+static snd_pcm_sframes_t mulaw_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ struct mulaw_priv *data;
+
+ if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+#ifdef CONFIG_SND_DEBUG
+ {
+ unsigned int channel;
+ for (channel = 0; channel < plugin->src_format.channels; channel++) {
+ if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+ src_channels[channel].area.step % 8))
+ return -ENXIO;
+ if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+ dst_channels[channel].area.step % 8))
+ return -ENXIO;
+ }
+ }
+#endif
+ if (frames > dst_channels[0].frames)
+ frames = dst_channels[0].frames;
+ data = (struct mulaw_priv *)plugin->extra_data;
+ data->func(plugin, src_channels, dst_channels, frames);
+ return frames;
+}
+
+static void init_data(struct mulaw_priv *data, snd_pcm_format_t format)
+{
+#ifdef SNDRV_LITTLE_ENDIAN
+ data->cvt_endian = snd_pcm_format_big_endian(format) > 0;
+#else
+ data->cvt_endian = snd_pcm_format_little_endian(format) > 0;
+#endif
+ if (!snd_pcm_format_signed(format))
+ data->flip = 0x8000;
+ data->native_bytes = snd_pcm_format_physical_width(format) / 8;
+ data->copy_bytes = data->native_bytes < 2 ? 1 : 2;
+ if (snd_pcm_format_little_endian(format)) {
+ data->native_ofs = data->native_bytes - data->copy_bytes;
+ data->copy_ofs = 2 - data->copy_bytes;
+ } else {
+ /* S24 in 4bytes need an 1 byte offset */
+ data->native_ofs = data->native_bytes -
+ snd_pcm_format_width(format) / 8;
+ }
+}
+
+int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
+{
+ int err;
+ struct mulaw_priv *data;
+ struct snd_pcm_plugin *plugin;
+ struct snd_pcm_plugin_format *format;
+ mulaw_f func;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+
+ if (snd_BUG_ON(src_format->rate != dst_format->rate))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->channels != dst_format->channels))
+ return -ENXIO;
+
+ if (dst_format->format == SNDRV_PCM_FORMAT_MU_LAW) {
+ format = src_format;
+ func = mulaw_encode;
+ }
+ else if (src_format->format == SNDRV_PCM_FORMAT_MU_LAW) {
+ format = dst_format;
+ func = mulaw_decode;
+ }
+ else {
+ snd_BUG();
+ return -EINVAL;
+ }
+ if (!snd_pcm_format_linear(format->format))
+ return -EINVAL;
+
+ err = snd_pcm_plugin_build(plug, "Mu-Law<->linear conversion",
+ src_format, dst_format,
+ sizeof(struct mulaw_priv), &plugin);
+ if (err < 0)
+ return err;
+ data = (struct mulaw_priv *)plugin->extra_data;
+ data->func = func;
+ init_data(data, format->format);
+ plugin->transfer = mulaw_transfer;
+ *r_plugin = plugin;
+ return 0;
+}
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
new file mode 100644
index 0000000000..728c211142
--- /dev/null
+++ b/sound/core/oss/pcm_oss.c
@@ -0,0 +1,3244 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Digital Audio (PCM) abstract layer / OSS compatible
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#if 0
+#define PLUGIN_DEBUG
+#endif
+#if 0
+#define OSS_DEBUG
+#endif
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/sched/signal.h>
+#include <linux/time.h>
+#include <linux/vmalloc.h>
+#include <linux/module.h>
+#include <linux/math64.h>
+#include <linux/string.h>
+#include <linux/compat.h>
+#include <sound/core.h>
+#include <sound/minors.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pcm_plugin.h"
+#include <sound/info.h>
+#include <linux/soundcard.h>
+#include <sound/initval.h>
+#include <sound/mixer_oss.h>
+
+#define OSS_ALSAEMULVER _SIOR ('M', 249, int)
+
+static int dsp_map[SNDRV_CARDS];
+static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
+static bool nonblock_open = 1;
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Abramo Bagnara <abramo@alsa-project.org>");
+MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
+MODULE_LICENSE("GPL");
+module_param_array(dsp_map, int, NULL, 0444);
+MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
+module_param_array(adsp_map, int, NULL, 0444);
+MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
+module_param(nonblock_open, bool, 0644);
+MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
+MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
+MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
+
+static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
+static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
+static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
+
+/*
+ * helper functions to process hw_params
+ */
+static int snd_interval_refine_min(struct snd_interval *i, unsigned int min, int openmin)
+{
+ int changed = 0;
+ if (i->min < min) {
+ i->min = min;
+ i->openmin = openmin;
+ changed = 1;
+ } else if (i->min == min && !i->openmin && openmin) {
+ i->openmin = 1;
+ changed = 1;
+ }
+ if (i->integer) {
+ if (i->openmin) {
+ i->min++;
+ i->openmin = 0;
+ }
+ }
+ if (snd_interval_checkempty(i)) {
+ snd_interval_none(i);
+ return -EINVAL;
+ }
+ return changed;
+}
+
+static int snd_interval_refine_max(struct snd_interval *i, unsigned int max, int openmax)
+{
+ int changed = 0;
+ if (i->max > max) {
+ i->max = max;
+ i->openmax = openmax;
+ changed = 1;
+ } else if (i->max == max && !i->openmax && openmax) {
+ i->openmax = 1;
+ changed = 1;
+ }
+ if (i->integer) {
+ if (i->openmax) {
+ i->max--;
+ i->openmax = 0;
+ }
+ }
+ if (snd_interval_checkempty(i)) {
+ snd_interval_none(i);
+ return -EINVAL;
+ }
+ return changed;
+}
+
+static int snd_interval_refine_set(struct snd_interval *i, unsigned int val)
+{
+ struct snd_interval t;
+ t.empty = 0;
+ t.min = t.max = val;
+ t.openmin = t.openmax = 0;
+ t.integer = 1;
+ return snd_interval_refine(i, &t);
+}
+
+/**
+ * snd_pcm_hw_param_value_min
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the minimum value for field PAR.
+ */
+static unsigned int
+snd_pcm_hw_param_value_min(const struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, int *dir)
+{
+ if (hw_is_mask(var)) {
+ if (dir)
+ *dir = 0;
+ return snd_mask_min(hw_param_mask_c(params, var));
+ }
+ if (hw_is_interval(var)) {
+ const struct snd_interval *i = hw_param_interval_c(params, var);
+ if (dir)
+ *dir = i->openmin;
+ return snd_interval_min(i);
+ }
+ return -EINVAL;
+}
+
+/**
+ * snd_pcm_hw_param_value_max
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Return the maximum value for field PAR.
+ */
+static int
+snd_pcm_hw_param_value_max(const struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, int *dir)
+{
+ if (hw_is_mask(var)) {
+ if (dir)
+ *dir = 0;
+ return snd_mask_max(hw_param_mask_c(params, var));
+ }
+ if (hw_is_interval(var)) {
+ const struct snd_interval *i = hw_param_interval_c(params, var);
+ if (dir)
+ *dir = - (int) i->openmax;
+ return snd_interval_max(i);
+ }
+ return -EINVAL;
+}
+
+static int _snd_pcm_hw_param_mask(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var,
+ const struct snd_mask *val)
+{
+ int changed;
+ changed = snd_mask_refine(hw_param_mask(params, var), val);
+ if (changed > 0) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+
+static int snd_pcm_hw_param_mask(struct snd_pcm_substream *pcm,
+ struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var,
+ const struct snd_mask *val)
+{
+ int changed = _snd_pcm_hw_param_mask(params, var, val);
+ if (changed < 0)
+ return changed;
+ if (params->rmask) {
+ int err = snd_pcm_hw_refine(pcm, params);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static int _snd_pcm_hw_param_min(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int dir)
+{
+ int changed;
+ int open = 0;
+ if (dir) {
+ if (dir > 0) {
+ open = 1;
+ } else if (dir < 0) {
+ if (val > 0) {
+ open = 1;
+ val--;
+ }
+ }
+ }
+ if (hw_is_mask(var))
+ changed = snd_mask_refine_min(hw_param_mask(params, var),
+ val + !!open);
+ else if (hw_is_interval(var))
+ changed = snd_interval_refine_min(hw_param_interval(params, var),
+ val, open);
+ else
+ return -EINVAL;
+ if (changed > 0) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+
+/**
+ * snd_pcm_hw_param_min
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: minimal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all
+ * values < VAL. Reduce configuration space accordingly.
+ * Return new minimum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_min(struct snd_pcm_substream *pcm,
+ struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int *dir)
+{
+ int changed = _snd_pcm_hw_param_min(params, var, val, dir ? *dir : 0);
+ if (changed < 0)
+ return changed;
+ if (params->rmask) {
+ int err = snd_pcm_hw_refine(pcm, params);
+ if (err < 0)
+ return err;
+ }
+ return snd_pcm_hw_param_value_min(params, var, dir);
+}
+
+static int _snd_pcm_hw_param_max(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int dir)
+{
+ int changed;
+ int open = 0;
+ if (dir) {
+ if (dir < 0) {
+ open = 1;
+ } else if (dir > 0) {
+ open = 1;
+ val++;
+ }
+ }
+ if (hw_is_mask(var)) {
+ if (val == 0 && open) {
+ snd_mask_none(hw_param_mask(params, var));
+ changed = -EINVAL;
+ } else
+ changed = snd_mask_refine_max(hw_param_mask(params, var),
+ val - !!open);
+ } else if (hw_is_interval(var))
+ changed = snd_interval_refine_max(hw_param_interval(params, var),
+ val, open);
+ else
+ return -EINVAL;
+ if (changed > 0) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+
+/**
+ * snd_pcm_hw_param_max
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: maximal value
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all
+ * values >= VAL + 1. Reduce configuration space accordingly.
+ * Return new maximum or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_max(struct snd_pcm_substream *pcm,
+ struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int *dir)
+{
+ int changed = _snd_pcm_hw_param_max(params, var, val, dir ? *dir : 0);
+ if (changed < 0)
+ return changed;
+ if (params->rmask) {
+ int err = snd_pcm_hw_refine(pcm, params);
+ if (err < 0)
+ return err;
+ }
+ return snd_pcm_hw_param_value_max(params, var, dir);
+}
+
+static int boundary_sub(int a, int adir,
+ int b, int bdir,
+ int *c, int *cdir)
+{
+ adir = adir < 0 ? -1 : (adir > 0 ? 1 : 0);
+ bdir = bdir < 0 ? -1 : (bdir > 0 ? 1 : 0);
+ *c = a - b;
+ *cdir = adir - bdir;
+ if (*cdir == -2) {
+ (*c)--;
+ } else if (*cdir == 2) {
+ (*c)++;
+ }
+ return 0;
+}
+
+static int boundary_lt(unsigned int a, int adir,
+ unsigned int b, int bdir)
+{
+ if (adir < 0) {
+ a--;
+ adir = 1;
+ } else if (adir > 0)
+ adir = 1;
+ if (bdir < 0) {
+ b--;
+ bdir = 1;
+ } else if (bdir > 0)
+ bdir = 1;
+ return a < b || (a == b && adir < bdir);
+}
+
+/* Return 1 if min is nearer to best than max */
+static int boundary_nearer(int min, int mindir,
+ int best, int bestdir,
+ int max, int maxdir)
+{
+ int dmin, dmindir;
+ int dmax, dmaxdir;
+ boundary_sub(best, bestdir, min, mindir, &dmin, &dmindir);
+ boundary_sub(max, maxdir, best, bestdir, &dmax, &dmaxdir);
+ return boundary_lt(dmin, dmindir, dmax, dmaxdir);
+}
+
+/**
+ * snd_pcm_hw_param_near
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @best: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS set PAR to the available value
+ * nearest to VAL. Reduce configuration space accordingly.
+ * This function cannot be called for SNDRV_PCM_HW_PARAM_ACCESS,
+ * SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_SUBFORMAT.
+ * Return the value found.
+ */
+static int snd_pcm_hw_param_near(struct snd_pcm_substream *pcm,
+ struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int best,
+ int *dir)
+{
+ struct snd_pcm_hw_params *save = NULL;
+ int v;
+ unsigned int saved_min;
+ int last = 0;
+ int min, max;
+ int mindir, maxdir;
+ int valdir = dir ? *dir : 0;
+ /* FIXME */
+ if (best > INT_MAX)
+ best = INT_MAX;
+ min = max = best;
+ mindir = maxdir = valdir;
+ if (maxdir > 0)
+ maxdir = 0;
+ else if (maxdir == 0)
+ maxdir = -1;
+ else {
+ maxdir = 1;
+ max--;
+ }
+ save = kmalloc(sizeof(*save), GFP_KERNEL);
+ if (save == NULL)
+ return -ENOMEM;
+ *save = *params;
+ saved_min = min;
+ min = snd_pcm_hw_param_min(pcm, params, var, min, &mindir);
+ if (min >= 0) {
+ struct snd_pcm_hw_params *params1;
+ if (max < 0)
+ goto _end;
+ if ((unsigned int)min == saved_min && mindir == valdir)
+ goto _end;
+ params1 = kmalloc(sizeof(*params1), GFP_KERNEL);
+ if (params1 == NULL) {
+ kfree(save);
+ return -ENOMEM;
+ }
+ *params1 = *save;
+ max = snd_pcm_hw_param_max(pcm, params1, var, max, &maxdir);
+ if (max < 0) {
+ kfree(params1);
+ goto _end;
+ }
+ if (boundary_nearer(max, maxdir, best, valdir, min, mindir)) {
+ *params = *params1;
+ last = 1;
+ }
+ kfree(params1);
+ } else {
+ *params = *save;
+ max = snd_pcm_hw_param_max(pcm, params, var, max, &maxdir);
+ if (max < 0) {
+ kfree(save);
+ return max;
+ }
+ last = 1;
+ }
+ _end:
+ kfree(save);
+ if (last)
+ v = snd_pcm_hw_param_last(pcm, params, var, dir);
+ else
+ v = snd_pcm_hw_param_first(pcm, params, var, dir);
+ return v;
+}
+
+static int _snd_pcm_hw_param_set(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int dir)
+{
+ int changed;
+ if (hw_is_mask(var)) {
+ struct snd_mask *m = hw_param_mask(params, var);
+ if (val == 0 && dir < 0) {
+ changed = -EINVAL;
+ snd_mask_none(m);
+ } else {
+ if (dir > 0)
+ val++;
+ else if (dir < 0)
+ val--;
+ changed = snd_mask_refine_set(hw_param_mask(params, var), val);
+ }
+ } else if (hw_is_interval(var)) {
+ struct snd_interval *i = hw_param_interval(params, var);
+ if (val == 0 && dir < 0) {
+ changed = -EINVAL;
+ snd_interval_none(i);
+ } else if (dir == 0)
+ changed = snd_interval_refine_set(i, val);
+ else {
+ struct snd_interval t;
+ t.openmin = 1;
+ t.openmax = 1;
+ t.empty = 0;
+ t.integer = 0;
+ if (dir < 0) {
+ t.min = val - 1;
+ t.max = val;
+ } else {
+ t.min = val;
+ t.max = val+1;
+ }
+ changed = snd_interval_refine(i, &t);
+ }
+ } else
+ return -EINVAL;
+ if (changed > 0) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+
+/**
+ * snd_pcm_hw_param_set
+ * @pcm: PCM instance
+ * @params: the hw_params instance
+ * @var: parameter to retrieve
+ * @val: value to set
+ * @dir: pointer to the direction (-1,0,1) or NULL
+ *
+ * Inside configuration space defined by PARAMS remove from PAR all
+ * values != VAL. Reduce configuration space accordingly.
+ * Return VAL or -EINVAL if the configuration space is empty
+ */
+static int snd_pcm_hw_param_set(struct snd_pcm_substream *pcm,
+ struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var, unsigned int val,
+ int dir)
+{
+ int changed = _snd_pcm_hw_param_set(params, var, val, dir);
+ if (changed < 0)
+ return changed;
+ if (params->rmask) {
+ int err = snd_pcm_hw_refine(pcm, params);
+ if (err < 0)
+ return err;
+ }
+ return snd_pcm_hw_param_value(params, var, NULL);
+}
+
+static int _snd_pcm_hw_param_setinteger(struct snd_pcm_hw_params *params,
+ snd_pcm_hw_param_t var)
+{
+ int changed;
+ changed = snd_interval_setinteger(hw_param_interval(params, var));
+ if (changed > 0) {
+ params->cmask |= 1 << var;
+ params->rmask |= 1 << var;
+ }
+ return changed;
+}
+
+/*
+ * plugin
+ */
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_plugin *plugin, *next;
+
+ plugin = runtime->oss.plugin_first;
+ while (plugin) {
+ next = plugin->next;
+ snd_pcm_plugin_free(plugin);
+ plugin = next;
+ }
+ runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
+ return 0;
+}
+
+static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
+{
+ struct snd_pcm_runtime *runtime = plugin->plug->runtime;
+ plugin->next = runtime->oss.plugin_first;
+ plugin->prev = NULL;
+ if (runtime->oss.plugin_first) {
+ runtime->oss.plugin_first->prev = plugin;
+ runtime->oss.plugin_first = plugin;
+ } else {
+ runtime->oss.plugin_last =
+ runtime->oss.plugin_first = plugin;
+ }
+ return 0;
+}
+
+int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
+{
+ struct snd_pcm_runtime *runtime = plugin->plug->runtime;
+ plugin->next = NULL;
+ plugin->prev = runtime->oss.plugin_last;
+ if (runtime->oss.plugin_last) {
+ runtime->oss.plugin_last->next = plugin;
+ runtime->oss.plugin_last = plugin;
+ } else {
+ runtime->oss.plugin_last =
+ runtime->oss.plugin_first = plugin;
+ }
+ return 0;
+}
+#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
+
+static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ long buffer_size = snd_pcm_lib_buffer_bytes(substream);
+ long bytes = frames_to_bytes(runtime, frames);
+ if (buffer_size == runtime->oss.buffer_bytes)
+ return bytes;
+#if BITS_PER_LONG >= 64
+ return runtime->oss.buffer_bytes * bytes / buffer_size;
+#else
+ {
+ u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
+ return div_u64(bsize, buffer_size);
+ }
+#endif
+}
+
+static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ long buffer_size = snd_pcm_lib_buffer_bytes(substream);
+ if (buffer_size == runtime->oss.buffer_bytes)
+ return bytes_to_frames(runtime, bytes);
+ return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
+}
+
+static inline
+snd_pcm_uframes_t get_hw_ptr_period(struct snd_pcm_runtime *runtime)
+{
+ return runtime->hw_ptr_interrupt;
+}
+
+/* define extended formats in the recent OSS versions (if any) */
+/* linear formats */
+#define AFMT_S32_LE 0x00001000
+#define AFMT_S32_BE 0x00002000
+#define AFMT_S24_LE 0x00008000
+#define AFMT_S24_BE 0x00010000
+#define AFMT_S24_PACKED 0x00040000
+
+/* other supported formats */
+#define AFMT_FLOAT 0x00004000
+#define AFMT_SPDIF_RAW 0x00020000
+
+/* unsupported formats */
+#define AFMT_AC3 0x00000400
+#define AFMT_VORBIS 0x00000800
+
+static snd_pcm_format_t snd_pcm_oss_format_from(int format)
+{
+ switch (format) {
+ case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW;
+ case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW;
+ case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM;
+ case AFMT_U8: return SNDRV_PCM_FORMAT_U8;
+ case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE;
+ case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE;
+ case AFMT_S8: return SNDRV_PCM_FORMAT_S8;
+ case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE;
+ case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE;
+ case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG;
+ case AFMT_S32_LE: return SNDRV_PCM_FORMAT_S32_LE;
+ case AFMT_S32_BE: return SNDRV_PCM_FORMAT_S32_BE;
+ case AFMT_S24_LE: return SNDRV_PCM_FORMAT_S24_LE;
+ case AFMT_S24_BE: return SNDRV_PCM_FORMAT_S24_BE;
+ case AFMT_S24_PACKED: return SNDRV_PCM_FORMAT_S24_3LE;
+ case AFMT_FLOAT: return SNDRV_PCM_FORMAT_FLOAT;
+ case AFMT_SPDIF_RAW: return SNDRV_PCM_FORMAT_IEC958_SUBFRAME;
+ default: return SNDRV_PCM_FORMAT_U8;
+ }
+}
+
+static int snd_pcm_oss_format_to(snd_pcm_format_t format)
+{
+ switch (format) {
+ case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW;
+ case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW;
+ case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM;
+ case SNDRV_PCM_FORMAT_U8: return AFMT_U8;
+ case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE;
+ case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE;
+ case SNDRV_PCM_FORMAT_S8: return AFMT_S8;
+ case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE;
+ case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE;
+ case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG;
+ case SNDRV_PCM_FORMAT_S32_LE: return AFMT_S32_LE;
+ case SNDRV_PCM_FORMAT_S32_BE: return AFMT_S32_BE;
+ case SNDRV_PCM_FORMAT_S24_LE: return AFMT_S24_LE;
+ case SNDRV_PCM_FORMAT_S24_BE: return AFMT_S24_BE;
+ case SNDRV_PCM_FORMAT_S24_3LE: return AFMT_S24_PACKED;
+ case SNDRV_PCM_FORMAT_FLOAT: return AFMT_FLOAT;
+ case SNDRV_PCM_FORMAT_IEC958_SUBFRAME: return AFMT_SPDIF_RAW;
+ default: return -EINVAL;
+ }
+}
+
+static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *oss_params,
+ struct snd_pcm_hw_params *slave_params)
+{
+ ssize_t s;
+ ssize_t oss_buffer_size;
+ ssize_t oss_period_size, oss_periods;
+ ssize_t min_period_size, max_period_size;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ size_t oss_frame_size;
+
+ oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
+ params_channels(oss_params) / 8;
+
+ oss_buffer_size = snd_pcm_hw_param_value_max(slave_params,
+ SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+ NULL);
+ if (oss_buffer_size <= 0)
+ return -EINVAL;
+ oss_buffer_size = snd_pcm_plug_client_size(substream,
+ oss_buffer_size * oss_frame_size);
+ if (oss_buffer_size <= 0)
+ return -EINVAL;
+ oss_buffer_size = rounddown_pow_of_two(oss_buffer_size);
+ if (atomic_read(&substream->mmap_count)) {
+ if (oss_buffer_size > runtime->oss.mmap_bytes)
+ oss_buffer_size = runtime->oss.mmap_bytes;
+ }
+
+ if (substream->oss.setup.period_size > 16)
+ oss_period_size = substream->oss.setup.period_size;
+ else if (runtime->oss.fragshift) {
+ oss_period_size = 1 << runtime->oss.fragshift;
+ if (oss_period_size > oss_buffer_size / 2)
+ oss_period_size = oss_buffer_size / 2;
+ } else {
+ int sd;
+ size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
+
+ oss_period_size = oss_buffer_size;
+ do {
+ oss_period_size /= 2;
+ } while (oss_period_size > bytes_per_sec);
+ if (runtime->oss.subdivision == 0) {
+ sd = 4;
+ if (oss_period_size / sd > 4096)
+ sd *= 2;
+ if (oss_period_size / sd < 4096)
+ sd = 1;
+ } else
+ sd = runtime->oss.subdivision;
+ oss_period_size /= sd;
+ if (oss_period_size < 16)
+ oss_period_size = 16;
+ }
+
+ min_period_size = snd_pcm_plug_client_size(substream,
+ snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
+ if (min_period_size > 0) {
+ min_period_size *= oss_frame_size;
+ min_period_size = roundup_pow_of_two(min_period_size);
+ if (oss_period_size < min_period_size)
+ oss_period_size = min_period_size;
+ }
+
+ max_period_size = snd_pcm_plug_client_size(substream,
+ snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
+ if (max_period_size > 0) {
+ max_period_size *= oss_frame_size;
+ max_period_size = rounddown_pow_of_two(max_period_size);
+ if (oss_period_size > max_period_size)
+ oss_period_size = max_period_size;
+ }
+
+ oss_periods = oss_buffer_size / oss_period_size;
+
+ if (substream->oss.setup.periods > 1)
+ oss_periods = substream->oss.setup.periods;
+
+ s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
+ if (s > 0 && runtime->oss.maxfrags && s > runtime->oss.maxfrags)
+ s = runtime->oss.maxfrags;
+ if (oss_periods > s)
+ oss_periods = s;
+
+ s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
+ if (s < 2)
+ s = 2;
+ if (oss_periods < s)
+ oss_periods = s;
+
+ while (oss_period_size * oss_periods > oss_buffer_size)
+ oss_period_size /= 2;
+
+ if (oss_period_size < 16)
+ return -EINVAL;
+
+ /* don't allocate too large period; 1MB period must be enough */
+ if (oss_period_size > 1024 * 1024)
+ return -ENOMEM;
+
+ runtime->oss.period_bytes = oss_period_size;
+ runtime->oss.period_frames = 1;
+ runtime->oss.periods = oss_periods;
+ return 0;
+}
+
+static int choose_rate(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, unsigned int best_rate)
+{
+ const struct snd_interval *it;
+ struct snd_pcm_hw_params *save;
+ unsigned int rate, prev;
+
+ save = kmalloc(sizeof(*save), GFP_KERNEL);
+ if (save == NULL)
+ return -ENOMEM;
+ *save = *params;
+ it = hw_param_interval_c(save, SNDRV_PCM_HW_PARAM_RATE);
+
+ /* try multiples of the best rate */
+ rate = best_rate;
+ for (;;) {
+ if (it->max < rate || (it->max == rate && it->openmax))
+ break;
+ if (it->min < rate || (it->min == rate && !it->openmin)) {
+ int ret;
+ ret = snd_pcm_hw_param_set(substream, params,
+ SNDRV_PCM_HW_PARAM_RATE,
+ rate, 0);
+ if (ret == (int)rate) {
+ kfree(save);
+ return rate;
+ }
+ *params = *save;
+ }
+ prev = rate;
+ rate += best_rate;
+ if (rate <= prev)
+ break;
+ }
+
+ /* not found, use the nearest rate */
+ kfree(save);
+ return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
+}
+
+/* parameter locking: returns immediately if tried during streaming */
+static int lock_params(struct snd_pcm_runtime *runtime)
+{
+ if (mutex_lock_interruptible(&runtime->oss.params_lock))
+ return -ERESTARTSYS;
+ if (atomic_read(&runtime->oss.rw_ref)) {
+ mutex_unlock(&runtime->oss.params_lock);
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static void unlock_params(struct snd_pcm_runtime *runtime)
+{
+ mutex_unlock(&runtime->oss.params_lock);
+}
+
+static void snd_pcm_oss_release_buffers(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ kvfree(runtime->oss.buffer);
+ runtime->oss.buffer = NULL;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ snd_pcm_oss_plugin_clear(substream);
+#endif
+}
+
+/* call with params_lock held */
+static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_pcm_hw_params *params, *sparams;
+ struct snd_pcm_sw_params *sw_params;
+ ssize_t oss_buffer_size, oss_period_size;
+ size_t oss_frame_size;
+ int err;
+ int direct;
+ snd_pcm_format_t format, sformat;
+ int n;
+ const struct snd_mask *sformat_mask;
+ struct snd_mask mask;
+
+ if (!runtime->oss.params)
+ return 0;
+ sw_params = kzalloc(sizeof(*sw_params), GFP_KERNEL);
+ params = kmalloc(sizeof(*params), GFP_KERNEL);
+ sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
+ if (!sw_params || !params || !sparams) {
+ err = -ENOMEM;
+ goto failure;
+ }
+
+ if (atomic_read(&substream->mmap_count))
+ direct = 1;
+ else
+ direct = substream->oss.setup.direct;
+
+ _snd_pcm_hw_params_any(sparams);
+ _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
+ _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
+ snd_mask_none(&mask);
+ if (atomic_read(&substream->mmap_count))
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
+ else {
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED);
+ if (!direct)
+ snd_mask_set(&mask, (__force int)SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
+ }
+ err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
+ if (err < 0) {
+ pcm_dbg(substream->pcm, "No usable accesses\n");
+ err = -EINVAL;
+ goto failure;
+ }
+
+ err = choose_rate(substream, sparams, runtime->oss.rate);
+ if (err < 0)
+ goto failure;
+ err = snd_pcm_hw_param_near(substream, sparams,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ runtime->oss.channels, NULL);
+ if (err < 0)
+ goto failure;
+
+ format = snd_pcm_oss_format_from(runtime->oss.format);
+
+ sformat_mask = hw_param_mask_c(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
+ if (direct)
+ sformat = format;
+ else
+ sformat = snd_pcm_plug_slave_format(format, sformat_mask);
+
+ if ((__force int)sformat < 0 ||
+ !snd_mask_test_format(sformat_mask, sformat)) {
+ pcm_for_each_format(sformat) {
+ if (snd_mask_test_format(sformat_mask, sformat) &&
+ snd_pcm_oss_format_to(sformat) >= 0)
+ goto format_found;
+ }
+ pcm_dbg(substream->pcm, "Cannot find a format!!!\n");
+ err = -EINVAL;
+ goto failure;
+ }
+ format_found:
+ err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, (__force int)sformat, 0);
+ if (err < 0)
+ goto failure;
+
+ if (direct) {
+ memcpy(params, sparams, sizeof(*params));
+ } else {
+ _snd_pcm_hw_params_any(params);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
+ (__force int)SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
+ (__force int)snd_pcm_oss_format_from(runtime->oss.format), 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
+ runtime->oss.channels, 0);
+ _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
+ runtime->oss.rate, 0);
+ pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
+ params_access(params), params_format(params),
+ params_channels(params), params_rate(params));
+ }
+ pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
+ params_access(sparams), params_format(sparams),
+ params_channels(sparams), params_rate(sparams));
+
+ oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
+ params_channels(params) / 8;
+
+ err = snd_pcm_oss_period_size(substream, params, sparams);
+ if (err < 0)
+ goto failure;
+
+ n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
+ err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
+ if (err < 0)
+ goto failure;
+
+ err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
+ runtime->oss.periods, NULL);
+ if (err < 0)
+ goto failure;
+
+ snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
+ if (err < 0) {
+ pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
+ goto failure;
+ }
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ snd_pcm_oss_plugin_clear(substream);
+ if (!direct) {
+ /* add necessary plugins */
+ err = snd_pcm_plug_format_plugins(substream, params, sparams);
+ if (err < 0) {
+ pcm_dbg(substream->pcm,
+ "snd_pcm_plug_format_plugins failed: %i\n", err);
+ goto failure;
+ }
+ if (runtime->oss.plugin_first) {
+ struct snd_pcm_plugin *plugin;
+ err = snd_pcm_plugin_build_io(substream, sparams, &plugin);
+ if (err < 0) {
+ pcm_dbg(substream->pcm,
+ "snd_pcm_plugin_build_io failed: %i\n", err);
+ goto failure;
+ }
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ err = snd_pcm_plugin_append(plugin);
+ } else {
+ err = snd_pcm_plugin_insert(plugin);
+ }
+ if (err < 0)
+ goto failure;
+ }
+ }
+#endif
+
+ if (runtime->oss.trigger) {
+ sw_params->start_threshold = 1;
+ } else {
+ sw_params->start_threshold = runtime->boundary;
+ }
+ if (atomic_read(&substream->mmap_count) ||
+ substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ sw_params->stop_threshold = runtime->boundary;
+ else
+ sw_params->stop_threshold = runtime->buffer_size;
+ sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
+ sw_params->period_step = 1;
+ sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+ 1 : runtime->period_size;
+ if (atomic_read(&substream->mmap_count) ||
+ substream->oss.setup.nosilence) {
+ sw_params->silence_threshold = 0;
+ sw_params->silence_size = 0;
+ } else {
+ snd_pcm_uframes_t frames;
+ frames = runtime->period_size + 16;
+ if (frames > runtime->buffer_size)
+ frames = runtime->buffer_size;
+ sw_params->silence_threshold = frames;
+ sw_params->silence_size = frames;
+ }
+
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params);
+ if (err < 0) {
+ pcm_dbg(substream->pcm, "SW_PARAMS failed: %i\n", err);
+ goto failure;
+ }
+
+ runtime->oss.periods = params_periods(sparams);
+ oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
+ if (oss_period_size < 0) {
+ err = -EINVAL;
+ goto failure;
+ }
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ if (runtime->oss.plugin_first) {
+ err = snd_pcm_plug_alloc(substream, oss_period_size);
+ if (err < 0)
+ goto failure;
+ }
+#endif
+ oss_period_size = array_size(oss_period_size, oss_frame_size);
+ oss_buffer_size = array_size(oss_period_size, runtime->oss.periods);
+ if (oss_buffer_size <= 0) {
+ err = -EINVAL;
+ goto failure;
+ }
+
+ runtime->oss.period_bytes = oss_period_size;
+ runtime->oss.buffer_bytes = oss_buffer_size;
+
+ pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
+ runtime->oss.period_bytes,
+ runtime->oss.buffer_bytes);
+ pdprintf("slave: period_size = %i, buffer_size = %i\n",
+ params_period_size(sparams),
+ params_buffer_size(sparams));
+
+ runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
+ runtime->oss.channels = params_channels(params);
+ runtime->oss.rate = params_rate(params);
+
+ kvfree(runtime->oss.buffer);
+ runtime->oss.buffer = kvzalloc(runtime->oss.period_bytes, GFP_KERNEL);
+ if (!runtime->oss.buffer) {
+ err = -ENOMEM;
+ goto failure;
+ }
+
+ runtime->oss.params = 0;
+ runtime->oss.prepare = 1;
+ runtime->oss.buffer_used = 0;
+ if (runtime->dma_area)
+ snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
+
+ runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
+
+ err = 0;
+failure:
+ if (err)
+ snd_pcm_oss_release_buffers(substream);
+ kfree(sw_params);
+ kfree(params);
+ kfree(sparams);
+ return err;
+}
+
+/* this one takes the lock by itself */
+static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream,
+ bool trylock)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int err;
+
+ if (trylock) {
+ if (!(mutex_trylock(&runtime->oss.params_lock)))
+ return -EAGAIN;
+ } else if (mutex_lock_interruptible(&runtime->oss.params_lock))
+ return -ERESTARTSYS;
+
+ err = snd_pcm_oss_change_params_locked(substream);
+ mutex_unlock(&runtime->oss.params_lock);
+ return err;
+}
+
+static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
+{
+ int idx, err;
+ struct snd_pcm_substream *asubstream = NULL, *substream;
+
+ for (idx = 0; idx < 2; idx++) {
+ substream = pcm_oss_file->streams[idx];
+ if (substream == NULL)
+ continue;
+ if (asubstream == NULL)
+ asubstream = substream;
+ if (substream->runtime->oss.params) {
+ err = snd_pcm_oss_change_params(substream, false);
+ if (err < 0)
+ return err;
+ }
+ }
+ if (!asubstream)
+ return -EIO;
+ if (r_substream)
+ *r_substream = asubstream;
+ return 0;
+}
+
+/* call with params_lock held */
+/* NOTE: this always call PREPARE unconditionally no matter whether
+ * runtime->oss.prepare is set or not
+ */
+static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
+{
+ int err;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
+ if (err < 0) {
+ pcm_dbg(substream->pcm,
+ "snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
+ return err;
+ }
+ runtime->oss.prepare = 0;
+ runtime->oss.prev_hw_ptr_period = 0;
+ runtime->oss.period_ptr = 0;
+ runtime->oss.buffer_used = 0;
+
+ return 0;
+}
+
+static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ runtime = substream->runtime;
+ if (runtime->oss.params) {
+ err = snd_pcm_oss_change_params(substream, false);
+ if (err < 0)
+ return err;
+ }
+ if (runtime->oss.prepare) {
+ if (mutex_lock_interruptible(&runtime->oss.params_lock))
+ return -ERESTARTSYS;
+ err = snd_pcm_oss_prepare(substream);
+ mutex_unlock(&runtime->oss.params_lock);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+/* call with params_lock held */
+static int snd_pcm_oss_make_ready_locked(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ runtime = substream->runtime;
+ if (runtime->oss.params) {
+ err = snd_pcm_oss_change_params_locked(substream);
+ if (err < 0)
+ return err;
+ }
+ if (runtime->oss.prepare) {
+ err = snd_pcm_oss_prepare(substream);
+ if (err < 0)
+ return err;
+ }
+ return 0;
+}
+
+static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
+{
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_uframes_t frames;
+ int err = 0;
+
+ while (1) {
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
+ if (err < 0)
+ break;
+ runtime = substream->runtime;
+ if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
+ break;
+ /* in case of overrun, skip whole periods like OSS/Linux driver does */
+ /* until avail(delay) <= buffer_size */
+ frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
+ frames /= runtime->period_size;
+ frames *= runtime->period_size;
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
+ if (err < 0)
+ break;
+ }
+ return err;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int ret;
+ while (1) {
+ if (runtime->state == SNDRV_PCM_STATE_XRUN ||
+ runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm,
+ "pcm_oss: write: recovering from %s\n",
+ runtime->state == SNDRV_PCM_STATE_XRUN ?
+ "XRUN" : "SUSPEND");
+#endif
+ ret = snd_pcm_oss_prepare(substream);
+ if (ret < 0)
+ break;
+ }
+ mutex_unlock(&runtime->oss.params_lock);
+ ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
+ frames, in_kernel);
+ mutex_lock(&runtime->oss.params_lock);
+ if (ret != -EPIPE && ret != -ESTRPIPE)
+ break;
+ /* test, if we can't store new data, because the stream */
+ /* has not been started */
+ if (runtime->state == SNDRV_PCM_STATE_PREPARED)
+ return -EAGAIN;
+ }
+ return ret;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_sframes_t delay;
+ int ret;
+ while (1) {
+ if (runtime->state == SNDRV_PCM_STATE_XRUN ||
+ runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm,
+ "pcm_oss: read: recovering from %s\n",
+ runtime->state == SNDRV_PCM_STATE_XRUN ?
+ "XRUN" : "SUSPEND");
+#endif
+ ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+ if (ret < 0)
+ break;
+ } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
+ ret = snd_pcm_oss_prepare(substream);
+ if (ret < 0)
+ break;
+ }
+ ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
+ if (ret < 0)
+ break;
+ mutex_unlock(&runtime->oss.params_lock);
+ ret = __snd_pcm_lib_xfer(substream, (void *)ptr, true,
+ frames, in_kernel);
+ mutex_lock(&runtime->oss.params_lock);
+ if (ret == -EPIPE) {
+ if (runtime->state == SNDRV_PCM_STATE_DRAINING) {
+ ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+ if (ret < 0)
+ break;
+ }
+ continue;
+ }
+ if (ret != -ESTRPIPE)
+ break;
+ }
+ return ret;
+}
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int ret;
+ while (1) {
+ if (runtime->state == SNDRV_PCM_STATE_XRUN ||
+ runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm,
+ "pcm_oss: writev: recovering from %s\n",
+ runtime->state == SNDRV_PCM_STATE_XRUN ?
+ "XRUN" : "SUSPEND");
+#endif
+ ret = snd_pcm_oss_prepare(substream);
+ if (ret < 0)
+ break;
+ }
+ ret = snd_pcm_kernel_writev(substream, bufs, frames);
+ if (ret != -EPIPE && ret != -ESTRPIPE)
+ break;
+
+ /* test, if we can't store new data, because the stream */
+ /* has not been started */
+ if (runtime->state == SNDRV_PCM_STATE_PREPARED)
+ return -EAGAIN;
+ }
+ return ret;
+}
+
+snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int ret;
+ while (1) {
+ if (runtime->state == SNDRV_PCM_STATE_XRUN ||
+ runtime->state == SNDRV_PCM_STATE_SUSPENDED) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm,
+ "pcm_oss: readv: recovering from %s\n",
+ runtime->state == SNDRV_PCM_STATE_XRUN ?
+ "XRUN" : "SUSPEND");
+#endif
+ ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+ if (ret < 0)
+ break;
+ } else if (runtime->state == SNDRV_PCM_STATE_SETUP) {
+ ret = snd_pcm_oss_prepare(substream);
+ if (ret < 0)
+ break;
+ }
+ ret = snd_pcm_kernel_readv(substream, bufs, frames);
+ if (ret != -EPIPE && ret != -ESTRPIPE)
+ break;
+ }
+ return ret;
+}
+#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
+
+static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ if (runtime->oss.plugin_first) {
+ struct snd_pcm_plugin_channel *channels;
+ size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
+ if (!in_kernel) {
+ if (copy_from_user(runtime->oss.buffer, (const char __force __user *)buf, bytes))
+ return -EFAULT;
+ buf = runtime->oss.buffer;
+ }
+ frames = bytes / oss_frame_bytes;
+ frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
+ if (frames1 < 0)
+ return frames1;
+ frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
+ if (frames1 <= 0)
+ return frames1;
+ bytes = frames1 * oss_frame_bytes;
+ } else
+#endif
+ {
+ frames = bytes_to_frames(runtime, bytes);
+ frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
+ if (frames1 <= 0)
+ return frames1;
+ bytes = frames_to_bytes(runtime, frames1);
+ }
+ return bytes;
+}
+
+static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
+{
+ size_t xfer = 0;
+ ssize_t tmp = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ if (atomic_read(&substream->mmap_count))
+ return -ENXIO;
+
+ atomic_inc(&runtime->oss.rw_ref);
+ while (bytes > 0) {
+ if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
+ tmp = -ERESTARTSYS;
+ break;
+ }
+ tmp = snd_pcm_oss_make_ready_locked(substream);
+ if (tmp < 0)
+ goto err;
+ if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
+ tmp = bytes;
+ if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
+ tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
+ if (tmp > 0) {
+ if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) {
+ tmp = -EFAULT;
+ goto err;
+ }
+ }
+ runtime->oss.buffer_used += tmp;
+ buf += tmp;
+ bytes -= tmp;
+ xfer += tmp;
+ if (substream->oss.setup.partialfrag ||
+ runtime->oss.buffer_used == runtime->oss.period_bytes) {
+ tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
+ runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
+ if (tmp <= 0)
+ goto err;
+ runtime->oss.bytes += tmp;
+ runtime->oss.period_ptr += tmp;
+ runtime->oss.period_ptr %= runtime->oss.period_bytes;
+ if (runtime->oss.period_ptr == 0 ||
+ runtime->oss.period_ptr == runtime->oss.buffer_used)
+ runtime->oss.buffer_used = 0;
+ else if ((substream->f_flags & O_NONBLOCK) != 0) {
+ tmp = -EAGAIN;
+ goto err;
+ }
+ }
+ } else {
+ tmp = snd_pcm_oss_write2(substream,
+ (const char __force *)buf,
+ runtime->oss.period_bytes, 0);
+ if (tmp <= 0)
+ goto err;
+ runtime->oss.bytes += tmp;
+ buf += tmp;
+ bytes -= tmp;
+ xfer += tmp;
+ if ((substream->f_flags & O_NONBLOCK) != 0 &&
+ tmp != runtime->oss.period_bytes)
+ tmp = -EAGAIN;
+ }
+ err:
+ mutex_unlock(&runtime->oss.params_lock);
+ if (tmp < 0)
+ break;
+ if (signal_pending(current)) {
+ tmp = -ERESTARTSYS;
+ break;
+ }
+ tmp = 0;
+ }
+ atomic_dec(&runtime->oss.rw_ref);
+ return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
+}
+
+static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ char __user *final_dst = (char __force __user *)buf;
+ if (runtime->oss.plugin_first) {
+ struct snd_pcm_plugin_channel *channels;
+ size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
+ if (!in_kernel)
+ buf = runtime->oss.buffer;
+ frames = bytes / oss_frame_bytes;
+ frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
+ if (frames1 < 0)
+ return frames1;
+ frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
+ if (frames1 <= 0)
+ return frames1;
+ bytes = frames1 * oss_frame_bytes;
+ if (!in_kernel && copy_to_user(final_dst, buf, bytes))
+ return -EFAULT;
+ } else
+#endif
+ {
+ frames = bytes_to_frames(runtime, bytes);
+ frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
+ if (frames1 <= 0)
+ return frames1;
+ bytes = frames_to_bytes(runtime, frames1);
+ }
+ return bytes;
+}
+
+static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
+{
+ size_t xfer = 0;
+ ssize_t tmp = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ if (atomic_read(&substream->mmap_count))
+ return -ENXIO;
+
+ atomic_inc(&runtime->oss.rw_ref);
+ while (bytes > 0) {
+ if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
+ tmp = -ERESTARTSYS;
+ break;
+ }
+ tmp = snd_pcm_oss_make_ready_locked(substream);
+ if (tmp < 0)
+ goto err;
+ if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
+ if (runtime->oss.buffer_used == 0) {
+ tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
+ if (tmp <= 0)
+ goto err;
+ runtime->oss.bytes += tmp;
+ runtime->oss.period_ptr = tmp;
+ runtime->oss.buffer_used = tmp;
+ }
+ tmp = bytes;
+ if ((size_t) tmp > runtime->oss.buffer_used)
+ tmp = runtime->oss.buffer_used;
+ if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) {
+ tmp = -EFAULT;
+ goto err;
+ }
+ buf += tmp;
+ bytes -= tmp;
+ xfer += tmp;
+ runtime->oss.buffer_used -= tmp;
+ } else {
+ tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
+ runtime->oss.period_bytes, 0);
+ if (tmp <= 0)
+ goto err;
+ runtime->oss.bytes += tmp;
+ buf += tmp;
+ bytes -= tmp;
+ xfer += tmp;
+ }
+ err:
+ mutex_unlock(&runtime->oss.params_lock);
+ if (tmp < 0)
+ break;
+ if (signal_pending(current)) {
+ tmp = -ERESTARTSYS;
+ break;
+ }
+ tmp = 0;
+ }
+ atomic_dec(&runtime->oss.rw_ref);
+ return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
+}
+
+static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ int i;
+
+ for (i = 0; i < 2; i++) {
+ substream = pcm_oss_file->streams[i];
+ if (!substream)
+ continue;
+ runtime = substream->runtime;
+ snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+ mutex_lock(&runtime->oss.params_lock);
+ runtime->oss.prepare = 1;
+ runtime->oss.buffer_used = 0;
+ runtime->oss.prev_hw_ptr_period = 0;
+ runtime->oss.period_ptr = 0;
+ mutex_unlock(&runtime->oss.params_lock);
+ }
+ return 0;
+}
+
+static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream != NULL) {
+ err = snd_pcm_oss_make_ready(substream);
+ if (err < 0)
+ return err;
+ snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
+ }
+ /* note: all errors from the start action are ignored */
+ /* OSS apps do not know, how to handle them */
+ return 0;
+}
+
+static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
+{
+ struct snd_pcm_runtime *runtime;
+ ssize_t result = 0;
+ snd_pcm_state_t state;
+ long res;
+ wait_queue_entry_t wait;
+
+ runtime = substream->runtime;
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&runtime->sleep, &wait);
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm, "sync1: size = %li\n", size);
+#endif
+ while (1) {
+ result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
+ if (result > 0) {
+ runtime->oss.buffer_used = 0;
+ result = 0;
+ break;
+ }
+ if (result != 0 && result != -EAGAIN)
+ break;
+ result = 0;
+ set_current_state(TASK_INTERRUPTIBLE);
+ snd_pcm_stream_lock_irq(substream);
+ state = runtime->state;
+ snd_pcm_stream_unlock_irq(substream);
+ if (state != SNDRV_PCM_STATE_RUNNING) {
+ set_current_state(TASK_RUNNING);
+ break;
+ }
+ res = schedule_timeout(10 * HZ);
+ if (signal_pending(current)) {
+ result = -ERESTARTSYS;
+ break;
+ }
+ if (res == 0) {
+ pcm_err(substream->pcm,
+ "OSS sync error - DMA timeout\n");
+ result = -EIO;
+ break;
+ }
+ }
+ remove_wait_queue(&runtime->sleep, &wait);
+ return result;
+}
+
+static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ int err = 0;
+ unsigned int saved_f_flags;
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_format_t format;
+ unsigned long width;
+ size_t size;
+
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream != NULL) {
+ runtime = substream->runtime;
+ if (atomic_read(&substream->mmap_count))
+ goto __direct;
+ atomic_inc(&runtime->oss.rw_ref);
+ if (mutex_lock_interruptible(&runtime->oss.params_lock)) {
+ atomic_dec(&runtime->oss.rw_ref);
+ return -ERESTARTSYS;
+ }
+ err = snd_pcm_oss_make_ready_locked(substream);
+ if (err < 0)
+ goto unlock;
+ format = snd_pcm_oss_format_from(runtime->oss.format);
+ width = snd_pcm_format_physical_width(format);
+ if (runtime->oss.buffer_used > 0) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm, "sync: buffer_used\n");
+#endif
+ size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
+ snd_pcm_format_set_silence(format,
+ runtime->oss.buffer + runtime->oss.buffer_used,
+ size);
+ err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
+ if (err < 0)
+ goto unlock;
+ } else if (runtime->oss.period_ptr > 0) {
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm, "sync: period_ptr\n");
+#endif
+ size = runtime->oss.period_bytes - runtime->oss.period_ptr;
+ snd_pcm_format_set_silence(format,
+ runtime->oss.buffer,
+ size * 8 / width);
+ err = snd_pcm_oss_sync1(substream, size);
+ if (err < 0)
+ goto unlock;
+ }
+ /*
+ * The ALSA's period might be a bit large than OSS one.
+ * Fill the remain portion of ALSA period with zeros.
+ */
+ size = runtime->control->appl_ptr % runtime->period_size;
+ if (size > 0) {
+ size = runtime->period_size - size;
+ if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED)
+ snd_pcm_lib_write(substream, NULL, size);
+ else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED)
+ snd_pcm_lib_writev(substream, NULL, size);
+ }
+unlock:
+ mutex_unlock(&runtime->oss.params_lock);
+ atomic_dec(&runtime->oss.rw_ref);
+ if (err < 0)
+ return err;
+ /*
+ * finish sync: drain the buffer
+ */
+ __direct:
+ saved_f_flags = substream->f_flags;
+ substream->f_flags &= ~O_NONBLOCK;
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
+ substream->f_flags = saved_f_flags;
+ if (err < 0)
+ return err;
+ mutex_lock(&runtime->oss.params_lock);
+ runtime->oss.prepare = 1;
+ mutex_unlock(&runtime->oss.params_lock);
+ }
+
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ if (substream != NULL) {
+ err = snd_pcm_oss_make_ready(substream);
+ if (err < 0)
+ return err;
+ runtime = substream->runtime;
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+ if (err < 0)
+ return err;
+ mutex_lock(&runtime->oss.params_lock);
+ runtime->oss.buffer_used = 0;
+ runtime->oss.prepare = 1;
+ mutex_unlock(&runtime->oss.params_lock);
+ }
+ return 0;
+}
+
+static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
+{
+ int idx;
+
+ for (idx = 1; idx >= 0; --idx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ if (substream == NULL)
+ continue;
+ runtime = substream->runtime;
+ if (rate < 1000)
+ rate = 1000;
+ else if (rate > 192000)
+ rate = 192000;
+ err = lock_params(runtime);
+ if (err < 0)
+ return err;
+ if (runtime->oss.rate != rate) {
+ runtime->oss.params = 1;
+ runtime->oss.rate = rate;
+ }
+ unlock_params(runtime);
+ }
+ return snd_pcm_oss_get_rate(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+
+ err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
+ if (err < 0)
+ return err;
+ return substream->runtime->oss.rate;
+}
+
+static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
+{
+ int idx;
+ if (channels < 1)
+ channels = 1;
+ if (channels > 128)
+ return -EINVAL;
+ for (idx = 1; idx >= 0; --idx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+ if (substream == NULL)
+ continue;
+ runtime = substream->runtime;
+ err = lock_params(runtime);
+ if (err < 0)
+ return err;
+ if (runtime->oss.channels != channels) {
+ runtime->oss.params = 1;
+ runtime->oss.channels = channels;
+ }
+ unlock_params(runtime);
+ }
+ return snd_pcm_oss_get_channels(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+
+ err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
+ if (err < 0)
+ return err;
+ return substream->runtime->oss.channels;
+}
+
+static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+
+ err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
+ if (err < 0)
+ return err;
+ return substream->runtime->oss.period_bytes;
+}
+
+static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+ int direct;
+ struct snd_pcm_hw_params *params;
+ unsigned int formats = 0;
+ const struct snd_mask *format_mask;
+ int fmt;
+
+ err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
+ if (err < 0)
+ return err;
+ if (atomic_read(&substream->mmap_count))
+ direct = 1;
+ else
+ direct = substream->oss.setup.direct;
+ if (!direct)
+ return AFMT_MU_LAW | AFMT_U8 |
+ AFMT_S16_LE | AFMT_S16_BE |
+ AFMT_S8 | AFMT_U16_LE |
+ AFMT_U16_BE |
+ AFMT_S32_LE | AFMT_S32_BE |
+ AFMT_S24_LE | AFMT_S24_BE |
+ AFMT_S24_PACKED;
+ params = kmalloc(sizeof(*params), GFP_KERNEL);
+ if (!params)
+ return -ENOMEM;
+ _snd_pcm_hw_params_any(params);
+ err = snd_pcm_hw_refine(substream, params);
+ if (err < 0)
+ goto error;
+ format_mask = hw_param_mask_c(params, SNDRV_PCM_HW_PARAM_FORMAT);
+ for (fmt = 0; fmt < 32; ++fmt) {
+ if (snd_mask_test(format_mask, fmt)) {
+ int f = snd_pcm_oss_format_to((__force snd_pcm_format_t)fmt);
+ if (f >= 0)
+ formats |= f;
+ }
+ }
+
+ error:
+ kfree(params);
+ return err < 0 ? err : formats;
+}
+
+static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
+{
+ int formats, idx;
+ int err;
+
+ if (format != AFMT_QUERY) {
+ formats = snd_pcm_oss_get_formats(pcm_oss_file);
+ if (formats < 0)
+ return formats;
+ if (!(formats & format))
+ format = AFMT_U8;
+ for (idx = 1; idx >= 0; --idx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ struct snd_pcm_runtime *runtime;
+ if (substream == NULL)
+ continue;
+ runtime = substream->runtime;
+ err = lock_params(runtime);
+ if (err < 0)
+ return err;
+ if (runtime->oss.format != format) {
+ runtime->oss.params = 1;
+ runtime->oss.format = format;
+ }
+ unlock_params(runtime);
+ }
+ }
+ return snd_pcm_oss_get_format(pcm_oss_file);
+}
+
+static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ int err;
+
+ err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream);
+ if (err < 0)
+ return err;
+ return substream->runtime->oss.format;
+}
+
+static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
+{
+ struct snd_pcm_runtime *runtime;
+
+ runtime = substream->runtime;
+ if (subdivide == 0) {
+ subdivide = runtime->oss.subdivision;
+ if (subdivide == 0)
+ subdivide = 1;
+ return subdivide;
+ }
+ if (runtime->oss.subdivision || runtime->oss.fragshift)
+ return -EINVAL;
+ if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
+ subdivide != 8 && subdivide != 16)
+ return -EINVAL;
+ runtime->oss.subdivision = subdivide;
+ runtime->oss.params = 1;
+ return subdivide;
+}
+
+static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
+{
+ int err = -EINVAL, idx;
+
+ for (idx = 1; idx >= 0; --idx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ struct snd_pcm_runtime *runtime;
+
+ if (substream == NULL)
+ continue;
+ runtime = substream->runtime;
+ err = lock_params(runtime);
+ if (err < 0)
+ return err;
+ err = snd_pcm_oss_set_subdivide1(substream, subdivide);
+ unlock_params(runtime);
+ if (err < 0)
+ return err;
+ }
+ return err;
+}
+
+static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
+{
+ struct snd_pcm_runtime *runtime;
+ int fragshift;
+
+ runtime = substream->runtime;
+ if (runtime->oss.subdivision || runtime->oss.fragshift)
+ return -EINVAL;
+ fragshift = val & 0xffff;
+ if (fragshift >= 25) /* should be large enough */
+ return -EINVAL;
+ runtime->oss.fragshift = fragshift;
+ runtime->oss.maxfrags = (val >> 16) & 0xffff;
+ if (runtime->oss.fragshift < 4) /* < 16 */
+ runtime->oss.fragshift = 4;
+ if (runtime->oss.maxfrags < 2)
+ runtime->oss.maxfrags = 2;
+ runtime->oss.params = 1;
+ return 0;
+}
+
+static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
+{
+ int err = -EINVAL, idx;
+
+ for (idx = 1; idx >= 0; --idx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ struct snd_pcm_runtime *runtime;
+
+ if (substream == NULL)
+ continue;
+ runtime = substream->runtime;
+ err = lock_params(runtime);
+ if (err < 0)
+ return err;
+ err = snd_pcm_oss_set_fragment1(substream, val);
+ unlock_params(runtime);
+ if (err < 0)
+ return err;
+ }
+ return err;
+}
+
+static int snd_pcm_oss_nonblock(struct file * file)
+{
+ spin_lock(&file->f_lock);
+ file->f_flags |= O_NONBLOCK;
+ spin_unlock(&file->f_lock);
+ return 0;
+}
+
+static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
+{
+
+ if (substream == NULL) {
+ res &= ~DSP_CAP_DUPLEX;
+ return res;
+ }
+#ifdef DSP_CAP_MULTI
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ if (substream->pstr->substream_count > 1)
+ res |= DSP_CAP_MULTI;
+#endif
+ /* DSP_CAP_REALTIME is set all times: */
+ /* all ALSA drivers can return actual pointer in ring buffer */
+#if defined(DSP_CAP_REALTIME) && 0
+ {
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
+ res &= ~DSP_CAP_REALTIME;
+ }
+#endif
+ return res;
+}
+
+static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ int result, idx;
+
+ result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
+ for (idx = 0; idx < 2; idx++) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
+ result = snd_pcm_oss_get_caps1(substream, result);
+ }
+ result |= 0x0001; /* revision - same as SB AWE 64 */
+ return result;
+}
+
+static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream,
+ snd_pcm_uframes_t hw_ptr)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t appl_ptr;
+ appl_ptr = hw_ptr + runtime->buffer_size;
+ appl_ptr %= runtime->boundary;
+ runtime->control->appl_ptr = appl_ptr;
+}
+
+static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
+{
+ struct snd_pcm_runtime *runtime;
+ struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+ int err, cmd;
+
+#ifdef OSS_DEBUG
+ pr_debug("pcm_oss: trigger = 0x%x\n", trigger);
+#endif
+
+ psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+
+ if (psubstream) {
+ err = snd_pcm_oss_make_ready(psubstream);
+ if (err < 0)
+ return err;
+ }
+ if (csubstream) {
+ err = snd_pcm_oss_make_ready(csubstream);
+ if (err < 0)
+ return err;
+ }
+ if (psubstream) {
+ runtime = psubstream->runtime;
+ cmd = 0;
+ if (mutex_lock_interruptible(&runtime->oss.params_lock))
+ return -ERESTARTSYS;
+ if (trigger & PCM_ENABLE_OUTPUT) {
+ if (runtime->oss.trigger)
+ goto _skip1;
+ if (atomic_read(&psubstream->mmap_count))
+ snd_pcm_oss_simulate_fill(psubstream,
+ get_hw_ptr_period(runtime));
+ runtime->oss.trigger = 1;
+ runtime->start_threshold = 1;
+ cmd = SNDRV_PCM_IOCTL_START;
+ } else {
+ if (!runtime->oss.trigger)
+ goto _skip1;
+ runtime->oss.trigger = 0;
+ runtime->start_threshold = runtime->boundary;
+ cmd = SNDRV_PCM_IOCTL_DROP;
+ runtime->oss.prepare = 1;
+ }
+ _skip1:
+ mutex_unlock(&runtime->oss.params_lock);
+ if (cmd) {
+ err = snd_pcm_kernel_ioctl(psubstream, cmd, NULL);
+ if (err < 0)
+ return err;
+ }
+ }
+ if (csubstream) {
+ runtime = csubstream->runtime;
+ cmd = 0;
+ if (mutex_lock_interruptible(&runtime->oss.params_lock))
+ return -ERESTARTSYS;
+ if (trigger & PCM_ENABLE_INPUT) {
+ if (runtime->oss.trigger)
+ goto _skip2;
+ runtime->oss.trigger = 1;
+ runtime->start_threshold = 1;
+ cmd = SNDRV_PCM_IOCTL_START;
+ } else {
+ if (!runtime->oss.trigger)
+ goto _skip2;
+ runtime->oss.trigger = 0;
+ runtime->start_threshold = runtime->boundary;
+ cmd = SNDRV_PCM_IOCTL_DROP;
+ runtime->oss.prepare = 1;
+ }
+ _skip2:
+ mutex_unlock(&runtime->oss.params_lock);
+ if (cmd) {
+ err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
+ if (err < 0)
+ return err;
+ }
+ }
+ return 0;
+}
+
+static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+ int result = 0;
+
+ psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
+ result |= PCM_ENABLE_OUTPUT;
+ if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
+ result |= PCM_ENABLE_INPUT;
+ return result;
+}
+
+static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_sframes_t delay;
+ int err;
+
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream == NULL)
+ return -EINVAL;
+ err = snd_pcm_oss_make_ready(substream);
+ if (err < 0)
+ return err;
+ runtime = substream->runtime;
+ if (runtime->oss.params || runtime->oss.prepare)
+ return 0;
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
+ if (err == -EPIPE)
+ delay = 0; /* hack for broken OSS applications */
+ else if (err < 0)
+ return err;
+ return snd_pcm_oss_bytes(substream, delay);
+}
+
+static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_sframes_t delay;
+ int fixup;
+ struct count_info info;
+ int err;
+
+ if (_info == NULL)
+ return -EFAULT;
+ substream = pcm_oss_file->streams[stream];
+ if (substream == NULL)
+ return -EINVAL;
+ err = snd_pcm_oss_make_ready(substream);
+ if (err < 0)
+ return err;
+ runtime = substream->runtime;
+ if (runtime->oss.params || runtime->oss.prepare) {
+ memset(&info, 0, sizeof(info));
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
+ if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
+ err = 0;
+ delay = 0;
+ fixup = 0;
+ } else {
+ fixup = runtime->oss.buffer_used;
+ }
+ } else {
+ err = snd_pcm_oss_capture_position_fixup(substream, &delay);
+ fixup = -runtime->oss.buffer_used;
+ }
+ if (err < 0)
+ return err;
+ info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
+ if (atomic_read(&substream->mmap_count)) {
+ snd_pcm_sframes_t n;
+ delay = get_hw_ptr_period(runtime);
+ n = delay - runtime->oss.prev_hw_ptr_period;
+ if (n < 0)
+ n += runtime->boundary;
+ info.blocks = n / runtime->period_size;
+ runtime->oss.prev_hw_ptr_period = delay;
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_pcm_oss_simulate_fill(substream, delay);
+ info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
+ } else {
+ delay = snd_pcm_oss_bytes(substream, delay);
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (substream->oss.setup.buggyptr)
+ info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
+ else
+ info.blocks = (delay + fixup) / runtime->oss.period_bytes;
+ info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
+ } else {
+ delay += fixup;
+ info.blocks = delay / runtime->oss.period_bytes;
+ info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
+ }
+ }
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
+{
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_runtime *runtime;
+ snd_pcm_sframes_t avail;
+ int fixup;
+ struct audio_buf_info info;
+ int err;
+
+ if (_info == NULL)
+ return -EFAULT;
+ substream = pcm_oss_file->streams[stream];
+ if (substream == NULL)
+ return -EINVAL;
+ runtime = substream->runtime;
+
+ if (runtime->oss.params) {
+ err = snd_pcm_oss_change_params(substream, false);
+ if (err < 0)
+ return err;
+ }
+
+ info.fragsize = runtime->oss.period_bytes;
+ info.fragstotal = runtime->periods;
+ if (runtime->oss.prepare) {
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
+ info.fragments = runtime->oss.periods;
+ } else {
+ info.bytes = 0;
+ info.fragments = 0;
+ }
+ } else {
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
+ if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
+ avail = runtime->buffer_size;
+ err = 0;
+ fixup = 0;
+ } else {
+ avail = runtime->buffer_size - avail;
+ fixup = -runtime->oss.buffer_used;
+ }
+ } else {
+ err = snd_pcm_oss_capture_position_fixup(substream, &avail);
+ fixup = runtime->oss.buffer_used;
+ }
+ if (err < 0)
+ return err;
+ info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
+ info.fragments = info.bytes / runtime->oss.period_bytes;
+ }
+
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm,
+ "pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n",
+ info.bytes, info.fragments, info.fragstotal, info.fragsize);
+#endif
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
+{
+ // it won't be probably implemented
+ // pr_debug("TODO: snd_pcm_oss_get_mapbuf\n");
+ return -EINVAL;
+}
+
+static const char *strip_task_path(const char *path)
+{
+ const char *ptr, *ptrl = NULL;
+ for (ptr = path; *ptr; ptr++) {
+ if (*ptr == '/')
+ ptrl = ptr + 1;
+ }
+ return ptrl;
+}
+
+static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
+ const char *task_name,
+ struct snd_pcm_oss_setup *rsetup)
+{
+ struct snd_pcm_oss_setup *setup;
+
+ mutex_lock(&pcm->streams[stream].oss.setup_mutex);
+ do {
+ for (setup = pcm->streams[stream].oss.setup_list; setup;
+ setup = setup->next) {
+ if (!strcmp(setup->task_name, task_name))
+ goto out;
+ }
+ } while ((task_name = strip_task_path(task_name)) != NULL);
+ out:
+ if (setup)
+ *rsetup = *setup;
+ mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
+}
+
+static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
+{
+ snd_pcm_oss_release_buffers(substream);
+ substream->oss.oss = 0;
+}
+
+static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
+ struct snd_pcm_oss_setup *setup,
+ int minor)
+{
+ struct snd_pcm_runtime *runtime;
+
+ substream->oss.oss = 1;
+ substream->oss.setup = *setup;
+ if (setup->nonblock)
+ substream->f_flags |= O_NONBLOCK;
+ else if (setup->block)
+ substream->f_flags &= ~O_NONBLOCK;
+ runtime = substream->runtime;
+ runtime->oss.params = 1;
+ runtime->oss.trigger = 1;
+ runtime->oss.rate = 8000;
+ mutex_init(&runtime->oss.params_lock);
+ switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
+ case SNDRV_MINOR_OSS_PCM_8:
+ runtime->oss.format = AFMT_U8;
+ break;
+ case SNDRV_MINOR_OSS_PCM_16:
+ runtime->oss.format = AFMT_S16_LE;
+ break;
+ default:
+ runtime->oss.format = AFMT_MU_LAW;
+ }
+ runtime->oss.channels = 1;
+ runtime->oss.fragshift = 0;
+ runtime->oss.maxfrags = 0;
+ runtime->oss.subdivision = 0;
+ substream->pcm_release = snd_pcm_oss_release_substream;
+ atomic_set(&runtime->oss.rw_ref, 0);
+}
+
+static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
+{
+ int cidx;
+ if (!pcm_oss_file)
+ return 0;
+ for (cidx = 0; cidx < 2; ++cidx) {
+ struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
+ if (substream)
+ snd_pcm_release_substream(substream);
+ }
+ kfree(pcm_oss_file);
+ return 0;
+}
+
+static int snd_pcm_oss_open_file(struct file *file,
+ struct snd_pcm *pcm,
+ struct snd_pcm_oss_file **rpcm_oss_file,
+ int minor,
+ struct snd_pcm_oss_setup *setup)
+{
+ int idx, err;
+ struct snd_pcm_oss_file *pcm_oss_file;
+ struct snd_pcm_substream *substream;
+ fmode_t f_mode = file->f_mode;
+
+ if (rpcm_oss_file)
+ *rpcm_oss_file = NULL;
+
+ pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
+ if (pcm_oss_file == NULL)
+ return -ENOMEM;
+
+ if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
+ (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
+ f_mode = FMODE_WRITE;
+
+ file->f_flags &= ~O_APPEND;
+ for (idx = 0; idx < 2; idx++) {
+ if (setup[idx].disable)
+ continue;
+ if (! pcm->streams[idx].substream_count)
+ continue; /* no matching substream */
+ if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (! (f_mode & FMODE_WRITE))
+ continue;
+ } else {
+ if (! (f_mode & FMODE_READ))
+ continue;
+ }
+ err = snd_pcm_open_substream(pcm, idx, file, &substream);
+ if (err < 0) {
+ snd_pcm_oss_release_file(pcm_oss_file);
+ return err;
+ }
+
+ pcm_oss_file->streams[idx] = substream;
+ snd_pcm_oss_init_substream(substream, &setup[idx], minor);
+ }
+
+ if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
+ snd_pcm_oss_release_file(pcm_oss_file);
+ return -EINVAL;
+ }
+
+ file->private_data = pcm_oss_file;
+ if (rpcm_oss_file)
+ *rpcm_oss_file = pcm_oss_file;
+ return 0;
+}
+
+
+static int snd_task_name(struct task_struct *task, char *name, size_t size)
+{
+ unsigned int idx;
+
+ if (snd_BUG_ON(!task || !name || size < 2))
+ return -EINVAL;
+ for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
+ name[idx] = task->comm[idx];
+ name[idx] = '\0';
+ return 0;
+}
+
+static int snd_pcm_oss_open(struct inode *inode, struct file *file)
+{
+ int err;
+ char task_name[32];
+ struct snd_pcm *pcm;
+ struct snd_pcm_oss_file *pcm_oss_file;
+ struct snd_pcm_oss_setup setup[2];
+ int nonblock;
+ wait_queue_entry_t wait;
+
+ err = nonseekable_open(inode, file);
+ if (err < 0)
+ return err;
+
+ pcm = snd_lookup_oss_minor_data(iminor(inode),
+ SNDRV_OSS_DEVICE_TYPE_PCM);
+ if (pcm == NULL) {
+ err = -ENODEV;
+ goto __error1;
+ }
+ err = snd_card_file_add(pcm->card, file);
+ if (err < 0)
+ goto __error1;
+ if (!try_module_get(pcm->card->module)) {
+ err = -EFAULT;
+ goto __error2;
+ }
+ if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
+ err = -EFAULT;
+ goto __error;
+ }
+ memset(setup, 0, sizeof(setup));
+ if (file->f_mode & FMODE_WRITE)
+ snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ task_name, &setup[0]);
+ if (file->f_mode & FMODE_READ)
+ snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ task_name, &setup[1]);
+
+ nonblock = !!(file->f_flags & O_NONBLOCK);
+ if (!nonblock)
+ nonblock = nonblock_open;
+
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&pcm->open_wait, &wait);
+ mutex_lock(&pcm->open_mutex);
+ while (1) {
+ err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
+ iminor(inode), setup);
+ if (err >= 0)
+ break;
+ if (err == -EAGAIN) {
+ if (nonblock) {
+ err = -EBUSY;
+ break;
+ }
+ } else
+ break;
+ set_current_state(TASK_INTERRUPTIBLE);
+ mutex_unlock(&pcm->open_mutex);
+ schedule();
+ mutex_lock(&pcm->open_mutex);
+ if (pcm->card->shutdown) {
+ err = -ENODEV;
+ break;
+ }
+ if (signal_pending(current)) {
+ err = -ERESTARTSYS;
+ break;
+ }
+ }
+ remove_wait_queue(&pcm->open_wait, &wait);
+ mutex_unlock(&pcm->open_mutex);
+ if (err < 0)
+ goto __error;
+ snd_card_unref(pcm->card);
+ return err;
+
+ __error:
+ module_put(pcm->card->module);
+ __error2:
+ snd_card_file_remove(pcm->card, file);
+ __error1:
+ if (pcm)
+ snd_card_unref(pcm->card);
+ return err;
+}
+
+static int snd_pcm_oss_release(struct inode *inode, struct file *file)
+{
+ struct snd_pcm *pcm;
+ struct snd_pcm_substream *substream;
+ struct snd_pcm_oss_file *pcm_oss_file;
+
+ pcm_oss_file = file->private_data;
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream == NULL)
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ if (snd_BUG_ON(!substream))
+ return -ENXIO;
+ pcm = substream->pcm;
+ if (!pcm->card->shutdown)
+ snd_pcm_oss_sync(pcm_oss_file);
+ mutex_lock(&pcm->open_mutex);
+ snd_pcm_oss_release_file(pcm_oss_file);
+ mutex_unlock(&pcm->open_mutex);
+ wake_up(&pcm->open_wait);
+ module_put(pcm->card->module);
+ snd_card_file_remove(pcm->card, file);
+ return 0;
+}
+
+static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct snd_pcm_oss_file *pcm_oss_file;
+ int __user *p = (int __user *)arg;
+ int res;
+
+ pcm_oss_file = file->private_data;
+ if (cmd == OSS_GETVERSION)
+ return put_user(SNDRV_OSS_VERSION, p);
+ if (cmd == OSS_ALSAEMULVER)
+ return put_user(1, p);
+#if IS_REACHABLE(CONFIG_SND_MIXER_OSS)
+ if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */
+ struct snd_pcm_substream *substream;
+ int idx;
+ for (idx = 0; idx < 2; ++idx) {
+ substream = pcm_oss_file->streams[idx];
+ if (substream != NULL)
+ break;
+ }
+ if (snd_BUG_ON(idx >= 2))
+ return -ENXIO;
+ return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
+ }
+#endif
+ if (((cmd >> 8) & 0xff) != 'P')
+ return -EINVAL;
+#ifdef OSS_DEBUG
+ pr_debug("pcm_oss: ioctl = 0x%x\n", cmd);
+#endif
+ switch (cmd) {
+ case SNDCTL_DSP_RESET:
+ return snd_pcm_oss_reset(pcm_oss_file);
+ case SNDCTL_DSP_SYNC:
+ return snd_pcm_oss_sync(pcm_oss_file);
+ case SNDCTL_DSP_SPEED:
+ if (get_user(res, p))
+ return -EFAULT;
+ res = snd_pcm_oss_set_rate(pcm_oss_file, res);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SOUND_PCM_READ_RATE:
+ res = snd_pcm_oss_get_rate(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_STEREO:
+ if (get_user(res, p))
+ return -EFAULT;
+ res = res > 0 ? 2 : 1;
+ res = snd_pcm_oss_set_channels(pcm_oss_file, res);
+ if (res < 0)
+ return res;
+ return put_user(--res, p);
+ case SNDCTL_DSP_GETBLKSIZE:
+ res = snd_pcm_oss_get_block_size(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_SETFMT:
+ if (get_user(res, p))
+ return -EFAULT;
+ res = snd_pcm_oss_set_format(pcm_oss_file, res);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SOUND_PCM_READ_BITS:
+ res = snd_pcm_oss_get_format(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_CHANNELS:
+ if (get_user(res, p))
+ return -EFAULT;
+ res = snd_pcm_oss_set_channels(pcm_oss_file, res);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SOUND_PCM_READ_CHANNELS:
+ res = snd_pcm_oss_get_channels(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SOUND_PCM_WRITE_FILTER:
+ case SOUND_PCM_READ_FILTER:
+ return -EIO;
+ case SNDCTL_DSP_POST:
+ return snd_pcm_oss_post(pcm_oss_file);
+ case SNDCTL_DSP_SUBDIVIDE:
+ if (get_user(res, p))
+ return -EFAULT;
+ res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (get_user(res, p))
+ return -EFAULT;
+ return snd_pcm_oss_set_fragment(pcm_oss_file, res);
+ case SNDCTL_DSP_GETFMTS:
+ res = snd_pcm_oss_get_formats(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_GETOSPACE:
+ case SNDCTL_DSP_GETISPACE:
+ return snd_pcm_oss_get_space(pcm_oss_file,
+ cmd == SNDCTL_DSP_GETISPACE ?
+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+ (struct audio_buf_info __user *) arg);
+ case SNDCTL_DSP_NONBLOCK:
+ return snd_pcm_oss_nonblock(file);
+ case SNDCTL_DSP_GETCAPS:
+ res = snd_pcm_oss_get_caps(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_GETTRIGGER:
+ res = snd_pcm_oss_get_trigger(pcm_oss_file);
+ if (res < 0)
+ return res;
+ return put_user(res, p);
+ case SNDCTL_DSP_SETTRIGGER:
+ if (get_user(res, p))
+ return -EFAULT;
+ return snd_pcm_oss_set_trigger(pcm_oss_file, res);
+ case SNDCTL_DSP_GETIPTR:
+ case SNDCTL_DSP_GETOPTR:
+ return snd_pcm_oss_get_ptr(pcm_oss_file,
+ cmd == SNDCTL_DSP_GETIPTR ?
+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+ (struct count_info __user *) arg);
+ case SNDCTL_DSP_MAPINBUF:
+ case SNDCTL_DSP_MAPOUTBUF:
+ return snd_pcm_oss_get_mapbuf(pcm_oss_file,
+ cmd == SNDCTL_DSP_MAPINBUF ?
+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
+ (struct buffmem_desc __user *) arg);
+ case SNDCTL_DSP_SETSYNCRO:
+ /* stop DMA now.. */
+ return 0;
+ case SNDCTL_DSP_SETDUPLEX:
+ if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
+ return 0;
+ return -EIO;
+ case SNDCTL_DSP_GETODELAY:
+ res = snd_pcm_oss_get_odelay(pcm_oss_file);
+ if (res < 0) {
+ /* it's for sure, some broken apps don't check for error codes */
+ put_user(0, p);
+ return res;
+ }
+ return put_user(res, p);
+ case SNDCTL_DSP_PROFILE:
+ return 0; /* silently ignore */
+ default:
+ pr_debug("pcm_oss: unknown command = 0x%x\n", cmd);
+ }
+ return -EINVAL;
+}
+
+#ifdef CONFIG_COMPAT
+/* all compatible */
+static long snd_pcm_oss_ioctl_compat(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ /*
+ * Everything is compatbile except SNDCTL_DSP_MAPINBUF/SNDCTL_DSP_MAPOUTBUF,
+ * which are not implemented for the native case either
+ */
+ return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+}
+#else
+#define snd_pcm_oss_ioctl_compat NULL
+#endif
+
+static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
+{
+ struct snd_pcm_oss_file *pcm_oss_file;
+ struct snd_pcm_substream *substream;
+
+ pcm_oss_file = file->private_data;
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ if (substream == NULL)
+ return -ENXIO;
+ substream->f_flags = file->f_flags & O_NONBLOCK;
+#ifndef OSS_DEBUG
+ return snd_pcm_oss_read1(substream, buf, count);
+#else
+ {
+ ssize_t res = snd_pcm_oss_read1(substream, buf, count);
+ pcm_dbg(substream->pcm,
+ "pcm_oss: read %li bytes (returned %li bytes)\n",
+ (long)count, (long)res);
+ return res;
+ }
+#endif
+}
+
+static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
+{
+ struct snd_pcm_oss_file *pcm_oss_file;
+ struct snd_pcm_substream *substream;
+ long result;
+
+ pcm_oss_file = file->private_data;
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream == NULL)
+ return -ENXIO;
+ substream->f_flags = file->f_flags & O_NONBLOCK;
+ result = snd_pcm_oss_write1(substream, buf, count);
+#ifdef OSS_DEBUG
+ pcm_dbg(substream->pcm, "pcm_oss: write %li bytes (wrote %li bytes)\n",
+ (long)count, (long)result);
+#endif
+ return result;
+}
+
+static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ if (atomic_read(&substream->mmap_count))
+ return runtime->oss.prev_hw_ptr_period !=
+ get_hw_ptr_period(runtime);
+ else
+ return snd_pcm_playback_avail(runtime) >=
+ runtime->oss.period_frames;
+}
+
+static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ if (atomic_read(&substream->mmap_count))
+ return runtime->oss.prev_hw_ptr_period !=
+ get_hw_ptr_period(runtime);
+ else
+ return snd_pcm_capture_avail(runtime) >=
+ runtime->oss.period_frames;
+}
+
+static __poll_t snd_pcm_oss_poll(struct file *file, poll_table * wait)
+{
+ struct snd_pcm_oss_file *pcm_oss_file;
+ __poll_t mask;
+ struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
+
+ pcm_oss_file = file->private_data;
+
+ psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+
+ mask = 0;
+ if (psubstream != NULL) {
+ struct snd_pcm_runtime *runtime = psubstream->runtime;
+ poll_wait(file, &runtime->sleep, wait);
+ snd_pcm_stream_lock_irq(psubstream);
+ if (runtime->state != SNDRV_PCM_STATE_DRAINING &&
+ (runtime->state != SNDRV_PCM_STATE_RUNNING ||
+ snd_pcm_oss_playback_ready(psubstream)))
+ mask |= EPOLLOUT | EPOLLWRNORM;
+ snd_pcm_stream_unlock_irq(psubstream);
+ }
+ if (csubstream != NULL) {
+ struct snd_pcm_runtime *runtime = csubstream->runtime;
+ snd_pcm_state_t ostate;
+ poll_wait(file, &runtime->sleep, wait);
+ snd_pcm_stream_lock_irq(csubstream);
+ ostate = runtime->state;
+ if (ostate != SNDRV_PCM_STATE_RUNNING ||
+ snd_pcm_oss_capture_ready(csubstream))
+ mask |= EPOLLIN | EPOLLRDNORM;
+ snd_pcm_stream_unlock_irq(csubstream);
+ if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
+ struct snd_pcm_oss_file ofile;
+ memset(&ofile, 0, sizeof(ofile));
+ ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ runtime->oss.trigger = 0;
+ snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
+ }
+ }
+
+ return mask;
+}
+
+static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
+{
+ struct snd_pcm_oss_file *pcm_oss_file;
+ struct snd_pcm_substream *substream = NULL;
+ struct snd_pcm_runtime *runtime;
+ int err;
+
+#ifdef OSS_DEBUG
+ pr_debug("pcm_oss: mmap begin\n");
+#endif
+ pcm_oss_file = file->private_data;
+ switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
+ case VM_READ | VM_WRITE:
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ if (substream)
+ break;
+ fallthrough;
+ case VM_READ:
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
+ break;
+ case VM_WRITE:
+ substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* set VM_READ access as well to fix memset() routines that do
+ reads before writes (to improve performance) */
+ vm_flags_set(area, VM_READ);
+ if (substream == NULL)
+ return -ENXIO;
+ runtime = substream->runtime;
+ if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
+ return -EIO;
+ if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
+ runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
+ else
+ return -EIO;
+
+ if (runtime->oss.params) {
+ /* use mutex_trylock() for params_lock for avoiding a deadlock
+ * between mmap_lock and params_lock taken by
+ * copy_from/to_user() in snd_pcm_oss_write/read()
+ */
+ err = snd_pcm_oss_change_params(substream, true);
+ if (err < 0)
+ return err;
+ }
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ if (runtime->oss.plugin_first != NULL)
+ return -EIO;
+#endif
+
+ if (area->vm_pgoff != 0)
+ return -EINVAL;
+
+ err = snd_pcm_mmap_data(substream, file, area);
+ if (err < 0)
+ return err;
+ runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
+ runtime->silence_threshold = 0;
+ runtime->silence_size = 0;
+#ifdef OSS_DEBUG
+ pr_debug("pcm_oss: mmap ok, bytes = 0x%x\n",
+ runtime->oss.mmap_bytes);
+#endif
+ /* In mmap mode we never stop */
+ runtime->stop_threshold = runtime->boundary;
+
+ return 0;
+}
+
+#ifdef CONFIG_SND_VERBOSE_PROCFS
+/*
+ * /proc interface
+ */
+
+static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_pcm_str *pstr = entry->private_data;
+ struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
+ mutex_lock(&pstr->oss.setup_mutex);
+ while (setup) {
+ snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
+ setup->task_name,
+ setup->periods,
+ setup->period_size,
+ setup->disable ? " disable" : "",
+ setup->direct ? " direct" : "",
+ setup->block ? " block" : "",
+ setup->nonblock ? " non-block" : "",
+ setup->partialfrag ? " partial-frag" : "",
+ setup->nosilence ? " no-silence" : "");
+ setup = setup->next;
+ }
+ mutex_unlock(&pstr->oss.setup_mutex);
+}
+
+static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
+{
+ struct snd_pcm_oss_setup *setup, *setupn;
+
+ for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
+ setup; setup = setupn) {
+ setupn = setup->next;
+ kfree(setup->task_name);
+ kfree(setup);
+ }
+ pstr->oss.setup_list = NULL;
+}
+
+static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
+ struct snd_info_buffer *buffer)
+{
+ struct snd_pcm_str *pstr = entry->private_data;
+ char line[128], str[32], task_name[32];
+ const char *ptr;
+ int idx1;
+ struct snd_pcm_oss_setup *setup, *setup1, template;
+
+ while (!snd_info_get_line(buffer, line, sizeof(line))) {
+ mutex_lock(&pstr->oss.setup_mutex);
+ memset(&template, 0, sizeof(template));
+ ptr = snd_info_get_str(task_name, line, sizeof(task_name));
+ if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
+ snd_pcm_oss_proc_free_setup_list(pstr);
+ mutex_unlock(&pstr->oss.setup_mutex);
+ continue;
+ }
+ for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
+ if (!strcmp(setup->task_name, task_name)) {
+ template = *setup;
+ break;
+ }
+ }
+ ptr = snd_info_get_str(str, ptr, sizeof(str));
+ template.periods = simple_strtoul(str, NULL, 10);
+ ptr = snd_info_get_str(str, ptr, sizeof(str));
+ template.period_size = simple_strtoul(str, NULL, 10);
+ for (idx1 = 31; idx1 >= 0; idx1--)
+ if (template.period_size & (1 << idx1))
+ break;
+ for (idx1--; idx1 >= 0; idx1--)
+ template.period_size &= ~(1 << idx1);
+ do {
+ ptr = snd_info_get_str(str, ptr, sizeof(str));
+ if (!strcmp(str, "disable")) {
+ template.disable = 1;
+ } else if (!strcmp(str, "direct")) {
+ template.direct = 1;
+ } else if (!strcmp(str, "block")) {
+ template.block = 1;
+ } else if (!strcmp(str, "non-block")) {
+ template.nonblock = 1;
+ } else if (!strcmp(str, "partial-frag")) {
+ template.partialfrag = 1;
+ } else if (!strcmp(str, "no-silence")) {
+ template.nosilence = 1;
+ } else if (!strcmp(str, "buggy-ptr")) {
+ template.buggyptr = 1;
+ }
+ } while (*str);
+ if (setup == NULL) {
+ setup = kmalloc(sizeof(*setup), GFP_KERNEL);
+ if (! setup) {
+ buffer->error = -ENOMEM;
+ mutex_unlock(&pstr->oss.setup_mutex);
+ return;
+ }
+ if (pstr->oss.setup_list == NULL)
+ pstr->oss.setup_list = setup;
+ else {
+ for (setup1 = pstr->oss.setup_list;
+ setup1->next; setup1 = setup1->next);
+ setup1->next = setup;
+ }
+ template.task_name = kstrdup(task_name, GFP_KERNEL);
+ if (! template.task_name) {
+ kfree(setup);
+ buffer->error = -ENOMEM;
+ mutex_unlock(&pstr->oss.setup_mutex);
+ return;
+ }
+ }
+ *setup = template;
+ mutex_unlock(&pstr->oss.setup_mutex);
+ }
+}
+
+static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
+{
+ int stream;
+ for (stream = 0; stream < 2; ++stream) {
+ struct snd_info_entry *entry;
+ struct snd_pcm_str *pstr = &pcm->streams[stream];
+ if (pstr->substream_count == 0)
+ continue;
+ entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root);
+ if (entry) {
+ entry->content = SNDRV_INFO_CONTENT_TEXT;
+ entry->mode = S_IFREG | 0644;
+ entry->c.text.read = snd_pcm_oss_proc_read;
+ entry->c.text.write = snd_pcm_oss_proc_write;
+ entry->private_data = pstr;
+ if (snd_info_register(entry) < 0) {
+ snd_info_free_entry(entry);
+ entry = NULL;
+ }
+ }
+ pstr->oss.proc_entry = entry;
+ }
+}
+
+static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
+{
+ int stream;
+ for (stream = 0; stream < 2; ++stream) {
+ struct snd_pcm_str *pstr = &pcm->streams[stream];
+ snd_info_free_entry(pstr->oss.proc_entry);
+ pstr->oss.proc_entry = NULL;
+ snd_pcm_oss_proc_free_setup_list(pstr);
+ }
+}
+#else /* !CONFIG_SND_VERBOSE_PROCFS */
+static inline void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
+{
+}
+static inline void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
+{
+}
+#endif /* CONFIG_SND_VERBOSE_PROCFS */
+
+/*
+ * ENTRY functions
+ */
+
+static const struct file_operations snd_pcm_oss_f_reg =
+{
+ .owner = THIS_MODULE,
+ .read = snd_pcm_oss_read,
+ .write = snd_pcm_oss_write,
+ .open = snd_pcm_oss_open,
+ .release = snd_pcm_oss_release,
+ .llseek = no_llseek,
+ .poll = snd_pcm_oss_poll,
+ .unlocked_ioctl = snd_pcm_oss_ioctl,
+ .compat_ioctl = snd_pcm_oss_ioctl_compat,
+ .mmap = snd_pcm_oss_mmap,
+};
+
+static void register_oss_dsp(struct snd_pcm *pcm, int index)
+{
+ if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+ pcm->card, index, &snd_pcm_oss_f_reg,
+ pcm) < 0) {
+ pcm_err(pcm, "unable to register OSS PCM device %i:%i\n",
+ pcm->card->number, pcm->device);
+ }
+}
+
+static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
+{
+ pcm->oss.reg = 0;
+ if (dsp_map[pcm->card->number] == (int)pcm->device) {
+ char name[128];
+ int duplex;
+ register_oss_dsp(pcm, 0);
+ duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
+ pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
+ !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
+ sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
+#ifdef SNDRV_OSS_INFO_DEV_AUDIO
+ snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
+ pcm->card->number,
+ name);
+#endif
+ pcm->oss.reg++;
+ pcm->oss.reg_mask |= 1;
+ }
+ if (adsp_map[pcm->card->number] == (int)pcm->device) {
+ register_oss_dsp(pcm, 1);
+ pcm->oss.reg++;
+ pcm->oss.reg_mask |= 2;
+ }
+
+ if (pcm->oss.reg)
+ snd_pcm_oss_proc_init(pcm);
+
+ return 0;
+}
+
+static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
+{
+ if (pcm->oss.reg) {
+ if (pcm->oss.reg_mask & 1) {
+ pcm->oss.reg_mask &= ~1;
+ snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+ pcm->card, 0);
+ }
+ if (pcm->oss.reg_mask & 2) {
+ pcm->oss.reg_mask &= ~2;
+ snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
+ pcm->card, 1);
+ }
+ if (dsp_map[pcm->card->number] == (int)pcm->device) {
+#ifdef SNDRV_OSS_INFO_DEV_AUDIO
+ snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
+#endif
+ }
+ pcm->oss.reg = 0;
+ }
+ return 0;
+}
+
+static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
+{
+ snd_pcm_oss_disconnect_minor(pcm);
+ snd_pcm_oss_proc_done(pcm);
+ return 0;
+}
+
+static struct snd_pcm_notify snd_pcm_oss_notify =
+{
+ .n_register = snd_pcm_oss_register_minor,
+ .n_disconnect = snd_pcm_oss_disconnect_minor,
+ .n_unregister = snd_pcm_oss_unregister_minor,
+};
+
+static int __init alsa_pcm_oss_init(void)
+{
+ int i;
+ int err;
+
+ /* check device map table */
+ for (i = 0; i < SNDRV_CARDS; i++) {
+ if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
+ pr_err("ALSA: pcm_oss: invalid dsp_map[%d] = %d\n",
+ i, dsp_map[i]);
+ dsp_map[i] = 0;
+ }
+ if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
+ pr_err("ALSA: pcm_oss: invalid adsp_map[%d] = %d\n",
+ i, adsp_map[i]);
+ adsp_map[i] = 1;
+ }
+ }
+ err = snd_pcm_notify(&snd_pcm_oss_notify, 0);
+ if (err < 0)
+ return err;
+ return 0;
+}
+
+static void __exit alsa_pcm_oss_exit(void)
+{
+ snd_pcm_notify(&snd_pcm_oss_notify, 1);
+}
+
+module_init(alsa_pcm_oss_init)
+module_exit(alsa_pcm_oss_exit)
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
new file mode 100644
index 0000000000..82e180c776
--- /dev/null
+++ b/sound/core/oss/pcm_plugin.c
@@ -0,0 +1,781 @@
+/*
+ * PCM Plug-In shared (kernel/library) code
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
+ * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#if 0
+#define PLUGIN_DEBUG
+#endif
+
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/vmalloc.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "pcm_plugin.h"
+
+#define snd_pcm_plug_first(plug) ((plug)->runtime->oss.plugin_first)
+#define snd_pcm_plug_last(plug) ((plug)->runtime->oss.plugin_last)
+
+/*
+ * because some cards might have rates "very close", we ignore
+ * all "resampling" requests within +-5%
+ */
+static int rate_match(unsigned int src_rate, unsigned int dst_rate)
+{
+ unsigned int low = (src_rate * 95) / 100;
+ unsigned int high = (src_rate * 105) / 100;
+ return dst_rate >= low && dst_rate <= high;
+}
+
+static int snd_pcm_plugin_alloc(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
+{
+ struct snd_pcm_plugin_format *format;
+ ssize_t width;
+ size_t size;
+ unsigned int channel;
+ struct snd_pcm_plugin_channel *c;
+
+ if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ format = &plugin->src_format;
+ } else {
+ format = &plugin->dst_format;
+ }
+ width = snd_pcm_format_physical_width(format->format);
+ if (width < 0)
+ return width;
+ size = array3_size(frames, format->channels, width);
+ /* check for too large period size once again */
+ if (size > 1024 * 1024)
+ return -ENOMEM;
+ if (snd_BUG_ON(size % 8))
+ return -ENXIO;
+ size /= 8;
+ if (plugin->buf_frames < frames) {
+ kvfree(plugin->buf);
+ plugin->buf = kvzalloc(size, GFP_KERNEL);
+ plugin->buf_frames = frames;
+ }
+ if (!plugin->buf) {
+ plugin->buf_frames = 0;
+ return -ENOMEM;
+ }
+ c = plugin->buf_channels;
+ if (plugin->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
+ for (channel = 0; channel < format->channels; channel++, c++) {
+ c->frames = frames;
+ c->enabled = 1;
+ c->wanted = 0;
+ c->area.addr = plugin->buf;
+ c->area.first = channel * width;
+ c->area.step = format->channels * width;
+ }
+ } else if (plugin->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
+ if (snd_BUG_ON(size % format->channels))
+ return -EINVAL;
+ size /= format->channels;
+ for (channel = 0; channel < format->channels; channel++, c++) {
+ c->frames = frames;
+ c->enabled = 1;
+ c->wanted = 0;
+ c->area.addr = plugin->buf + (channel * size);
+ c->area.first = 0;
+ c->area.step = width;
+ }
+ } else
+ return -EINVAL;
+ return 0;
+}
+
+int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames)
+{
+ int err;
+ if (snd_BUG_ON(!snd_pcm_plug_first(plug)))
+ return -ENXIO;
+ if (snd_pcm_plug_stream(plug) == SNDRV_PCM_STREAM_PLAYBACK) {
+ struct snd_pcm_plugin *plugin = snd_pcm_plug_first(plug);
+ while (plugin->next) {
+ if (plugin->dst_frames)
+ frames = plugin->dst_frames(plugin, frames);
+ if ((snd_pcm_sframes_t)frames <= 0)
+ return -ENXIO;
+ plugin = plugin->next;
+ err = snd_pcm_plugin_alloc(plugin, frames);
+ if (err < 0)
+ return err;
+ }
+ } else {
+ struct snd_pcm_plugin *plugin = snd_pcm_plug_last(plug);
+ while (plugin->prev) {
+ if (plugin->src_frames)
+ frames = plugin->src_frames(plugin, frames);
+ if ((snd_pcm_sframes_t)frames <= 0)
+ return -ENXIO;
+ plugin = plugin->prev;
+ err = snd_pcm_plugin_alloc(plugin, frames);
+ if (err < 0)
+ return err;
+ }
+ }
+ return 0;
+}
+
+
+snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,
+ snd_pcm_uframes_t frames,
+ struct snd_pcm_plugin_channel **channels)
+{
+ *channels = plugin->buf_channels;
+ return frames;
+}
+
+int snd_pcm_plugin_build(struct snd_pcm_substream *plug,
+ const char *name,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ size_t extra,
+ struct snd_pcm_plugin **ret)
+{
+ struct snd_pcm_plugin *plugin;
+ unsigned int channels;
+
+ if (snd_BUG_ON(!plug))
+ return -ENXIO;
+ if (snd_BUG_ON(!src_format || !dst_format))
+ return -ENXIO;
+ plugin = kzalloc(sizeof(*plugin) + extra, GFP_KERNEL);
+ if (plugin == NULL)
+ return -ENOMEM;
+ plugin->name = name;
+ plugin->plug = plug;
+ plugin->stream = snd_pcm_plug_stream(plug);
+ plugin->access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
+ plugin->src_format = *src_format;
+ plugin->src_width = snd_pcm_format_physical_width(src_format->format);
+ snd_BUG_ON(plugin->src_width <= 0);
+ plugin->dst_format = *dst_format;
+ plugin->dst_width = snd_pcm_format_physical_width(dst_format->format);
+ snd_BUG_ON(plugin->dst_width <= 0);
+ if (plugin->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ channels = src_format->channels;
+ else
+ channels = dst_format->channels;
+ plugin->buf_channels = kcalloc(channels, sizeof(*plugin->buf_channels), GFP_KERNEL);
+ if (plugin->buf_channels == NULL) {
+ snd_pcm_plugin_free(plugin);
+ return -ENOMEM;
+ }
+ plugin->client_channels = snd_pcm_plugin_client_channels;
+ *ret = plugin;
+ return 0;
+}
+
+int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin)
+{
+ if (! plugin)
+ return 0;
+ if (plugin->private_free)
+ plugin->private_free(plugin);
+ kfree(plugin->buf_channels);
+ kvfree(plugin->buf);
+ kfree(plugin);
+ return 0;
+}
+
+static snd_pcm_sframes_t calc_dst_frames(struct snd_pcm_substream *plug,
+ snd_pcm_sframes_t frames,
+ bool check_size)
+{
+ struct snd_pcm_plugin *plugin, *plugin_next;
+
+ plugin = snd_pcm_plug_first(plug);
+ while (plugin && frames > 0) {
+ plugin_next = plugin->next;
+ if (check_size && plugin->buf_frames &&
+ frames > plugin->buf_frames)
+ frames = plugin->buf_frames;
+ if (plugin->dst_frames) {
+ frames = plugin->dst_frames(plugin, frames);
+ if (frames < 0)
+ return frames;
+ }
+ plugin = plugin_next;
+ }
+ return frames;
+}
+
+static snd_pcm_sframes_t calc_src_frames(struct snd_pcm_substream *plug,
+ snd_pcm_sframes_t frames,
+ bool check_size)
+{
+ struct snd_pcm_plugin *plugin, *plugin_prev;
+
+ plugin = snd_pcm_plug_last(plug);
+ while (plugin && frames > 0) {
+ plugin_prev = plugin->prev;
+ if (plugin->src_frames) {
+ frames = plugin->src_frames(plugin, frames);
+ if (frames < 0)
+ return frames;
+ }
+ if (check_size && plugin->buf_frames &&
+ frames > plugin->buf_frames)
+ frames = plugin->buf_frames;
+ plugin = plugin_prev;
+ }
+ return frames;
+}
+
+snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t drv_frames)
+{
+ if (snd_BUG_ON(!plug))
+ return -ENXIO;
+ switch (snd_pcm_plug_stream(plug)) {
+ case SNDRV_PCM_STREAM_PLAYBACK:
+ return calc_src_frames(plug, drv_frames, false);
+ case SNDRV_PCM_STREAM_CAPTURE:
+ return calc_dst_frames(plug, drv_frames, false);
+ default:
+ snd_BUG();
+ return -EINVAL;
+ }
+}
+
+snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *plug, snd_pcm_uframes_t clt_frames)
+{
+ if (snd_BUG_ON(!plug))
+ return -ENXIO;
+ switch (snd_pcm_plug_stream(plug)) {
+ case SNDRV_PCM_STREAM_PLAYBACK:
+ return calc_dst_frames(plug, clt_frames, false);
+ case SNDRV_PCM_STREAM_CAPTURE:
+ return calc_src_frames(plug, clt_frames, false);
+ default:
+ snd_BUG();
+ return -EINVAL;
+ }
+}
+
+static int snd_pcm_plug_formats(const struct snd_mask *mask,
+ snd_pcm_format_t format)
+{
+ struct snd_mask formats = *mask;
+ u64 linfmts = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
+ SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
+ SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_S24_LE |
+ SNDRV_PCM_FMTBIT_U24_BE | SNDRV_PCM_FMTBIT_S24_BE |
+ SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_U24_3BE | SNDRV_PCM_FMTBIT_S24_3BE |
+ SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
+ SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE);
+ snd_mask_set(&formats, (__force int)SNDRV_PCM_FORMAT_MU_LAW);
+
+ if (formats.bits[0] & lower_32_bits(linfmts))
+ formats.bits[0] |= lower_32_bits(linfmts);
+ if (formats.bits[1] & upper_32_bits(linfmts))
+ formats.bits[1] |= upper_32_bits(linfmts);
+ return snd_mask_test(&formats, (__force int)format);
+}
+
+static const snd_pcm_format_t preferred_formats[] = {
+ SNDRV_PCM_FORMAT_S16_LE,
+ SNDRV_PCM_FORMAT_S16_BE,
+ SNDRV_PCM_FORMAT_U16_LE,
+ SNDRV_PCM_FORMAT_U16_BE,
+ SNDRV_PCM_FORMAT_S24_3LE,
+ SNDRV_PCM_FORMAT_S24_3BE,
+ SNDRV_PCM_FORMAT_U24_3LE,
+ SNDRV_PCM_FORMAT_U24_3BE,
+ SNDRV_PCM_FORMAT_S24_LE,
+ SNDRV_PCM_FORMAT_S24_BE,
+ SNDRV_PCM_FORMAT_U24_LE,
+ SNDRV_PCM_FORMAT_U24_BE,
+ SNDRV_PCM_FORMAT_S32_LE,
+ SNDRV_PCM_FORMAT_S32_BE,
+ SNDRV_PCM_FORMAT_U32_LE,
+ SNDRV_PCM_FORMAT_U32_BE,
+ SNDRV_PCM_FORMAT_S8,
+ SNDRV_PCM_FORMAT_U8
+};
+
+snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format,
+ const struct snd_mask *format_mask)
+{
+ int i;
+
+ if (snd_mask_test(format_mask, (__force int)format))
+ return format;
+ if (!snd_pcm_plug_formats(format_mask, format))
+ return (__force snd_pcm_format_t)-EINVAL;
+ if (snd_pcm_format_linear(format)) {
+ unsigned int width = snd_pcm_format_width(format);
+ int unsignd = snd_pcm_format_unsigned(format) > 0;
+ int big = snd_pcm_format_big_endian(format) > 0;
+ unsigned int badness, best = -1;
+ snd_pcm_format_t best_format = (__force snd_pcm_format_t)-1;
+ for (i = 0; i < ARRAY_SIZE(preferred_formats); i++) {
+ snd_pcm_format_t f = preferred_formats[i];
+ unsigned int w;
+ if (!snd_mask_test(format_mask, (__force int)f))
+ continue;
+ w = snd_pcm_format_width(f);
+ if (w >= width)
+ badness = w - width;
+ else
+ badness = width - w + 32;
+ badness += snd_pcm_format_unsigned(f) != unsignd;
+ badness += snd_pcm_format_big_endian(f) != big;
+ if (badness < best) {
+ best_format = f;
+ best = badness;
+ }
+ }
+ if ((__force int)best_format >= 0)
+ return best_format;
+ else
+ return (__force snd_pcm_format_t)-EINVAL;
+ } else {
+ switch (format) {
+ case SNDRV_PCM_FORMAT_MU_LAW:
+ for (i = 0; i < ARRAY_SIZE(preferred_formats); ++i) {
+ snd_pcm_format_t format1 = preferred_formats[i];
+ if (snd_mask_test(format_mask, (__force int)format1))
+ return format1;
+ }
+ fallthrough;
+ default:
+ return (__force snd_pcm_format_t)-EINVAL;
+ }
+ }
+}
+
+int snd_pcm_plug_format_plugins(struct snd_pcm_substream *plug,
+ struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_params *slave_params)
+{
+ struct snd_pcm_plugin_format tmpformat;
+ struct snd_pcm_plugin_format dstformat;
+ struct snd_pcm_plugin_format srcformat;
+ snd_pcm_access_t src_access, dst_access;
+ struct snd_pcm_plugin *plugin = NULL;
+ int err;
+ int stream = snd_pcm_plug_stream(plug);
+ int slave_interleaved = (params_channels(slave_params) == 1 ||
+ params_access(slave_params) == SNDRV_PCM_ACCESS_RW_INTERLEAVED);
+
+ switch (stream) {
+ case SNDRV_PCM_STREAM_PLAYBACK:
+ dstformat.format = params_format(slave_params);
+ dstformat.rate = params_rate(slave_params);
+ dstformat.channels = params_channels(slave_params);
+ srcformat.format = params_format(params);
+ srcformat.rate = params_rate(params);
+ srcformat.channels = params_channels(params);
+ src_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
+ dst_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED :
+ SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
+ break;
+ case SNDRV_PCM_STREAM_CAPTURE:
+ dstformat.format = params_format(params);
+ dstformat.rate = params_rate(params);
+ dstformat.channels = params_channels(params);
+ srcformat.format = params_format(slave_params);
+ srcformat.rate = params_rate(slave_params);
+ srcformat.channels = params_channels(slave_params);
+ src_access = (slave_interleaved ? SNDRV_PCM_ACCESS_RW_INTERLEAVED :
+ SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
+ dst_access = SNDRV_PCM_ACCESS_RW_INTERLEAVED;
+ break;
+ default:
+ snd_BUG();
+ return -EINVAL;
+ }
+ tmpformat = srcformat;
+
+ pdprintf("srcformat: format=%i, rate=%i, channels=%i\n",
+ srcformat.format,
+ srcformat.rate,
+ srcformat.channels);
+ pdprintf("dstformat: format=%i, rate=%i, channels=%i\n",
+ dstformat.format,
+ dstformat.rate,
+ dstformat.channels);
+
+ /* Format change (linearization) */
+ if (! rate_match(srcformat.rate, dstformat.rate) &&
+ ! snd_pcm_format_linear(srcformat.format)) {
+ if (srcformat.format != SNDRV_PCM_FORMAT_MU_LAW)
+ return -EINVAL;
+ tmpformat.format = SNDRV_PCM_FORMAT_S16;
+ err = snd_pcm_plugin_build_mulaw(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
+ /* channels reduction */
+ if (srcformat.channels > dstformat.channels) {
+ tmpformat.channels = dstformat.channels;
+ err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
+ pdprintf("channels reduction: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
+ /* rate resampling */
+ if (!rate_match(srcformat.rate, dstformat.rate)) {
+ if (srcformat.format != SNDRV_PCM_FORMAT_S16) {
+ /* convert to S16 for resampling */
+ tmpformat.format = SNDRV_PCM_FORMAT_S16;
+ err = snd_pcm_plugin_build_linear(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+ tmpformat.rate = dstformat.rate;
+ err = snd_pcm_plugin_build_rate(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ pdprintf("rate down resampling: src=%i, dst=%i returns %i\n", srcformat.rate, tmpformat.rate, err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
+ /* format change */
+ if (srcformat.format != dstformat.format) {
+ tmpformat.format = dstformat.format;
+ if (srcformat.format == SNDRV_PCM_FORMAT_MU_LAW ||
+ tmpformat.format == SNDRV_PCM_FORMAT_MU_LAW) {
+ err = snd_pcm_plugin_build_mulaw(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ }
+ else if (snd_pcm_format_linear(srcformat.format) &&
+ snd_pcm_format_linear(tmpformat.format)) {
+ err = snd_pcm_plugin_build_linear(plug,
+ &srcformat, &tmpformat,
+ &plugin);
+ }
+ else
+ return -EINVAL;
+ pdprintf("format change: src=%i, dst=%i returns %i\n", srcformat.format, tmpformat.format, err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
+ /* channels extension */
+ if (srcformat.channels < dstformat.channels) {
+ tmpformat.channels = dstformat.channels;
+ err = snd_pcm_plugin_build_route(plug, &srcformat, &tmpformat, &plugin);
+ pdprintf("channels extension: src=%i, dst=%i returns %i\n", srcformat.channels, tmpformat.channels, err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ srcformat = tmpformat;
+ src_access = dst_access;
+ }
+
+ /* de-interleave */
+ if (src_access != dst_access) {
+ err = snd_pcm_plugin_build_copy(plug,
+ &srcformat,
+ &tmpformat,
+ &plugin);
+ pdprintf("interleave change (copy: returns %i)\n", err);
+ if (err < 0)
+ return err;
+ err = snd_pcm_plugin_append(plugin);
+ if (err < 0) {
+ snd_pcm_plugin_free(plugin);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *plug,
+ char *buf,
+ snd_pcm_uframes_t count,
+ struct snd_pcm_plugin_channel **channels)
+{
+ struct snd_pcm_plugin *plugin;
+ struct snd_pcm_plugin_channel *v;
+ struct snd_pcm_plugin_format *format;
+ int width, nchannels, channel;
+ int stream = snd_pcm_plug_stream(plug);
+
+ if (snd_BUG_ON(!buf))
+ return -ENXIO;
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ plugin = snd_pcm_plug_first(plug);
+ format = &plugin->src_format;
+ } else {
+ plugin = snd_pcm_plug_last(plug);
+ format = &plugin->dst_format;
+ }
+ v = plugin->buf_channels;
+ *channels = v;
+ width = snd_pcm_format_physical_width(format->format);
+ if (width < 0)
+ return width;
+ nchannels = format->channels;
+ if (snd_BUG_ON(plugin->access != SNDRV_PCM_ACCESS_RW_INTERLEAVED &&
+ format->channels > 1))
+ return -ENXIO;
+ for (channel = 0; channel < nchannels; channel++, v++) {
+ v->frames = count;
+ v->enabled = 1;
+ v->wanted = (stream == SNDRV_PCM_STREAM_CAPTURE);
+ v->area.addr = buf;
+ v->area.first = channel * width;
+ v->area.step = nchannels * width;
+ }
+ return count;
+}
+
+snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *src_channels, snd_pcm_uframes_t size)
+{
+ struct snd_pcm_plugin *plugin, *next;
+ struct snd_pcm_plugin_channel *dst_channels;
+ int err;
+ snd_pcm_sframes_t frames = size;
+
+ plugin = snd_pcm_plug_first(plug);
+ while (plugin) {
+ if (frames <= 0)
+ return frames;
+ next = plugin->next;
+ if (next) {
+ snd_pcm_sframes_t frames1 = frames;
+ if (plugin->dst_frames) {
+ frames1 = plugin->dst_frames(plugin, frames);
+ if (frames1 <= 0)
+ return frames1;
+ }
+ err = next->client_channels(next, frames1, &dst_channels);
+ if (err < 0)
+ return err;
+ if (err != frames1) {
+ frames = err;
+ if (plugin->src_frames) {
+ frames = plugin->src_frames(plugin, frames1);
+ if (frames <= 0)
+ return frames;
+ }
+ }
+ } else
+ dst_channels = NULL;
+ pdprintf("write plugin: %s, %li\n", plugin->name, frames);
+ frames = plugin->transfer(plugin, src_channels, dst_channels, frames);
+ if (frames < 0)
+ return frames;
+ src_channels = dst_channels;
+ plugin = next;
+ }
+ return calc_src_frames(plug, frames, true);
+}
+
+snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *plug, struct snd_pcm_plugin_channel *dst_channels_final, snd_pcm_uframes_t size)
+{
+ struct snd_pcm_plugin *plugin, *next;
+ struct snd_pcm_plugin_channel *src_channels, *dst_channels;
+ snd_pcm_sframes_t frames = size;
+ int err;
+
+ frames = calc_src_frames(plug, frames, true);
+ if (frames < 0)
+ return frames;
+
+ src_channels = NULL;
+ plugin = snd_pcm_plug_first(plug);
+ while (plugin && frames > 0) {
+ next = plugin->next;
+ if (next) {
+ err = plugin->client_channels(plugin, frames, &dst_channels);
+ if (err < 0)
+ return err;
+ frames = err;
+ } else {
+ dst_channels = dst_channels_final;
+ }
+ pdprintf("read plugin: %s, %li\n", plugin->name, frames);
+ frames = plugin->transfer(plugin, src_channels, dst_channels, frames);
+ if (frames < 0)
+ return frames;
+ plugin = next;
+ src_channels = dst_channels;
+ }
+ return frames;
+}
+
+int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_area, size_t dst_offset,
+ size_t samples, snd_pcm_format_t format)
+{
+ /* FIXME: sub byte resolution and odd dst_offset */
+ unsigned char *dst;
+ unsigned int dst_step;
+ int width;
+ const unsigned char *silence;
+ if (!dst_area->addr)
+ return 0;
+ dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8;
+ width = snd_pcm_format_physical_width(format);
+ if (width <= 0)
+ return -EINVAL;
+ if (dst_area->step == (unsigned int) width && width >= 8)
+ return snd_pcm_format_set_silence(format, dst, samples);
+ silence = snd_pcm_format_silence_64(format);
+ if (! silence)
+ return -EINVAL;
+ dst_step = dst_area->step / 8;
+ if (width == 4) {
+ /* Ima ADPCM */
+ int dstbit = dst_area->first % 8;
+ int dstbit_step = dst_area->step % 8;
+ while (samples-- > 0) {
+ if (dstbit)
+ *dst &= 0xf0;
+ else
+ *dst &= 0x0f;
+ dst += dst_step;
+ dstbit += dstbit_step;
+ if (dstbit == 8) {
+ dst++;
+ dstbit = 0;
+ }
+ }
+ } else {
+ width /= 8;
+ while (samples-- > 0) {
+ memcpy(dst, silence, width);
+ dst += dst_step;
+ }
+ }
+ return 0;
+}
+
+int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_area, size_t src_offset,
+ const struct snd_pcm_channel_area *dst_area, size_t dst_offset,
+ size_t samples, snd_pcm_format_t format)
+{
+ /* FIXME: sub byte resolution and odd dst_offset */
+ char *src, *dst;
+ int width;
+ int src_step, dst_step;
+ src = src_area->addr + (src_area->first + src_area->step * src_offset) / 8;
+ if (!src_area->addr)
+ return snd_pcm_area_silence(dst_area, dst_offset, samples, format);
+ dst = dst_area->addr + (dst_area->first + dst_area->step * dst_offset) / 8;
+ if (!dst_area->addr)
+ return 0;
+ width = snd_pcm_format_physical_width(format);
+ if (width <= 0)
+ return -EINVAL;
+ if (src_area->step == (unsigned int) width &&
+ dst_area->step == (unsigned int) width && width >= 8) {
+ size_t bytes = samples * width / 8;
+ memcpy(dst, src, bytes);
+ return 0;
+ }
+ src_step = src_area->step / 8;
+ dst_step = dst_area->step / 8;
+ if (width == 4) {
+ /* Ima ADPCM */
+ int srcbit = src_area->first % 8;
+ int srcbit_step = src_area->step % 8;
+ int dstbit = dst_area->first % 8;
+ int dstbit_step = dst_area->step % 8;
+ while (samples-- > 0) {
+ unsigned char srcval;
+ if (srcbit)
+ srcval = *src & 0x0f;
+ else
+ srcval = (*src & 0xf0) >> 4;
+ if (dstbit)
+ *dst = (*dst & 0xf0) | srcval;
+ else
+ *dst = (*dst & 0x0f) | (srcval << 4);
+ src += src_step;
+ srcbit += srcbit_step;
+ if (srcbit == 8) {
+ src++;
+ srcbit = 0;
+ }
+ dst += dst_step;
+ dstbit += dstbit_step;
+ if (dstbit == 8) {
+ dst++;
+ dstbit = 0;
+ }
+ }
+ } else {
+ width /= 8;
+ while (samples-- > 0) {
+ memcpy(dst, src, width);
+ src += src_step;
+ dst += dst_step;
+ }
+ }
+ return 0;
+}
diff --git a/sound/core/oss/pcm_plugin.h b/sound/core/oss/pcm_plugin.h
new file mode 100644
index 0000000000..50a6b50f5d
--- /dev/null
+++ b/sound/core/oss/pcm_plugin.h
@@ -0,0 +1,168 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __PCM_PLUGIN_H
+#define __PCM_PLUGIN_H
+
+/*
+ * Digital Audio (Plugin interface) abstract layer
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ */
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
+#define snd_pcm_plug_stream(plug) ((plug)->stream)
+
+enum snd_pcm_plugin_action {
+ INIT = 0,
+ PREPARE = 1,
+};
+
+struct snd_pcm_channel_area {
+ void *addr; /* base address of channel samples */
+ unsigned int first; /* offset to first sample in bits */
+ unsigned int step; /* samples distance in bits */
+};
+
+struct snd_pcm_plugin_channel {
+ void *aptr; /* pointer to the allocated area */
+ struct snd_pcm_channel_area area;
+ snd_pcm_uframes_t frames; /* allocated frames */
+ unsigned int enabled:1; /* channel need to be processed */
+ unsigned int wanted:1; /* channel is wanted */
+};
+
+struct snd_pcm_plugin_format {
+ snd_pcm_format_t format;
+ unsigned int rate;
+ unsigned int channels;
+};
+
+struct snd_pcm_plugin {
+ const char *name; /* plug-in name */
+ int stream;
+ struct snd_pcm_plugin_format src_format; /* source format */
+ struct snd_pcm_plugin_format dst_format; /* destination format */
+ int src_width; /* sample width in bits */
+ int dst_width; /* sample width in bits */
+ snd_pcm_access_t access;
+ snd_pcm_sframes_t (*src_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t dst_frames);
+ snd_pcm_sframes_t (*dst_frames)(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t src_frames);
+ snd_pcm_sframes_t (*client_channels)(struct snd_pcm_plugin *plugin,
+ snd_pcm_uframes_t frames,
+ struct snd_pcm_plugin_channel **channels);
+ snd_pcm_sframes_t (*transfer)(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames);
+ int (*action)(struct snd_pcm_plugin *plugin,
+ enum snd_pcm_plugin_action action,
+ unsigned long data);
+ struct snd_pcm_plugin *prev;
+ struct snd_pcm_plugin *next;
+ struct snd_pcm_substream *plug;
+ void *private_data;
+ void (*private_free)(struct snd_pcm_plugin *plugin);
+ char *buf;
+ snd_pcm_uframes_t buf_frames;
+ struct snd_pcm_plugin_channel *buf_channels;
+ char extra_data[];
+};
+
+int snd_pcm_plugin_build(struct snd_pcm_substream *handle,
+ const char *name,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ size_t extra,
+ struct snd_pcm_plugin **ret);
+int snd_pcm_plugin_free(struct snd_pcm_plugin *plugin);
+int snd_pcm_plugin_clear(struct snd_pcm_plugin **first);
+int snd_pcm_plug_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size);
+snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size);
+
+#define FULL ROUTE_PLUGIN_RESOLUTION
+#define HALF ROUTE_PLUGIN_RESOLUTION / 2
+
+int snd_pcm_plugin_build_io(struct snd_pcm_substream *handle,
+ struct snd_pcm_hw_params *params,
+ struct snd_pcm_plugin **r_plugin);
+int snd_pcm_plugin_build_linear(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin);
+int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin);
+int snd_pcm_plugin_build_rate(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin);
+int snd_pcm_plugin_build_route(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin);
+int snd_pcm_plugin_build_copy(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin);
+
+int snd_pcm_plug_format_plugins(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_params *slave_params);
+
+snd_pcm_format_t snd_pcm_plug_slave_format(snd_pcm_format_t format,
+ const struct snd_mask *format_mask);
+
+int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin);
+
+snd_pcm_sframes_t snd_pcm_plug_write_transfer(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_channel *src_channels,
+ snd_pcm_uframes_t size);
+snd_pcm_sframes_t snd_pcm_plug_read_transfer(struct snd_pcm_substream *handle,
+ struct snd_pcm_plugin_channel *dst_channels_final,
+ snd_pcm_uframes_t size);
+
+snd_pcm_sframes_t snd_pcm_plug_client_channels_buf(struct snd_pcm_substream *handle,
+ char *buf, snd_pcm_uframes_t count,
+ struct snd_pcm_plugin_channel **channels);
+
+snd_pcm_sframes_t snd_pcm_plugin_client_channels(struct snd_pcm_plugin *plugin,
+ snd_pcm_uframes_t frames,
+ struct snd_pcm_plugin_channel **channels);
+
+int snd_pcm_area_silence(const struct snd_pcm_channel_area *dst_channel,
+ size_t dst_offset,
+ size_t samples, snd_pcm_format_t format);
+int snd_pcm_area_copy(const struct snd_pcm_channel_area *src_channel,
+ size_t src_offset,
+ const struct snd_pcm_channel_area *dst_channel,
+ size_t dst_offset,
+ size_t samples, snd_pcm_format_t format);
+
+void *snd_pcm_plug_buf_alloc(struct snd_pcm_substream *plug, snd_pcm_uframes_t size);
+void snd_pcm_plug_buf_unlock(struct snd_pcm_substream *plug, void *ptr);
+#else
+
+static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }
+static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; }
+static inline int snd_pcm_plug_slave_format(int format, const struct snd_mask *format_mask) { return format; }
+
+#endif
+
+snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream,
+ const char *ptr, snd_pcm_uframes_t size,
+ int in_kernel);
+snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream,
+ char *ptr, snd_pcm_uframes_t size, int in_kernel);
+snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream,
+ void **bufs, snd_pcm_uframes_t frames);
+snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream,
+ void **bufs, snd_pcm_uframes_t frames);
+
+#ifdef PLUGIN_DEBUG
+#define pdprintf(fmt, args...) printk(KERN_DEBUG "plugin: " fmt, ##args)
+#else
+#define pdprintf(fmt, args...)
+#endif
+
+#endif /* __PCM_PLUGIN_H */
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
new file mode 100644
index 0000000000..9826911934
--- /dev/null
+++ b/sound/core/oss/rate.c
@@ -0,0 +1,348 @@
+/*
+ * Rate conversion Plug-In
+ * Copyright (c) 1999 by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+#define SHIFT 11
+#define BITS (1<<SHIFT)
+#define R_MASK (BITS-1)
+
+/*
+ * Basic rate conversion plugin
+ */
+
+struct rate_channel {
+ signed short last_S1;
+ signed short last_S2;
+};
+
+typedef void (*rate_f)(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ int src_frames, int dst_frames);
+
+struct rate_priv {
+ unsigned int pitch;
+ unsigned int pos;
+ rate_f func;
+ snd_pcm_sframes_t old_src_frames, old_dst_frames;
+ struct rate_channel channels[];
+};
+
+static void rate_init(struct snd_pcm_plugin *plugin)
+{
+ unsigned int channel;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ data->pos = 0;
+ for (channel = 0; channel < plugin->src_format.channels; channel++) {
+ data->channels[channel].last_S1 = 0;
+ data->channels[channel].last_S2 = 0;
+ }
+}
+
+static void resample_expand(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ int src_frames, int dst_frames)
+{
+ unsigned int pos = 0;
+ signed int val;
+ signed short S1, S2;
+ signed short *src, *dst;
+ unsigned int channel;
+ int src_step, dst_step;
+ int src_frames1, dst_frames1;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
+
+ for (channel = 0; channel < plugin->src_format.channels; channel++) {
+ pos = data->pos;
+ S1 = rchannels->last_S1;
+ S2 = rchannels->last_S2;
+ if (!src_channels[channel].enabled) {
+ if (dst_channels[channel].wanted)
+ snd_pcm_area_silence(&dst_channels[channel].area, 0, dst_frames, plugin->dst_format.format);
+ dst_channels[channel].enabled = 0;
+ continue;
+ }
+ dst_channels[channel].enabled = 1;
+ src = (signed short *)src_channels[channel].area.addr +
+ src_channels[channel].area.first / 8 / 2;
+ dst = (signed short *)dst_channels[channel].area.addr +
+ dst_channels[channel].area.first / 8 / 2;
+ src_step = src_channels[channel].area.step / 8 / 2;
+ dst_step = dst_channels[channel].area.step / 8 / 2;
+ src_frames1 = src_frames;
+ dst_frames1 = dst_frames;
+ while (dst_frames1-- > 0) {
+ if (pos & ~R_MASK) {
+ pos &= R_MASK;
+ S1 = S2;
+ if (src_frames1-- > 0) {
+ S2 = *src;
+ src += src_step;
+ }
+ }
+ val = S1 + ((S2 - S1) * (signed int)pos) / BITS;
+ if (val < -32768)
+ val = -32768;
+ else if (val > 32767)
+ val = 32767;
+ *dst = val;
+ dst += dst_step;
+ pos += data->pitch;
+ }
+ rchannels->last_S1 = S1;
+ rchannels->last_S2 = S2;
+ rchannels++;
+ }
+ data->pos = pos;
+}
+
+static void resample_shrink(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ int src_frames, int dst_frames)
+{
+ unsigned int pos = 0;
+ signed int val;
+ signed short S1, S2;
+ signed short *src, *dst;
+ unsigned int channel;
+ int src_step, dst_step;
+ int src_frames1, dst_frames1;
+ struct rate_priv *data = (struct rate_priv *)plugin->extra_data;
+ struct rate_channel *rchannels = data->channels;
+
+ for (channel = 0; channel < plugin->src_format.channels; ++channel) {
+ pos = data->pos;
+ S1 = rchannels->last_S1;
+ S2 = rchannels->last_S2;
+ if (!src_channels[channel].enabled) {
+ if (dst_channels[channel].wanted)
+ snd_pcm_area_silence(&dst_channels[channel].area, 0, dst_frames, plugin->dst_format.format);
+ dst_channels[channel].enabled = 0;
+ continue;
+ }
+ dst_channels[channel].enabled = 1;
+ src = (signed short *)src_channels[channel].area.addr +
+ src_channels[channel].area.first / 8 / 2;
+ dst = (signed short *)dst_channels[channel].area.addr +
+ dst_channels[channel].area.first / 8 / 2;
+ src_step = src_channels[channel].area.step / 8 / 2;
+ dst_step = dst_channels[channel].area.step / 8 / 2;
+ src_frames1 = src_frames;
+ dst_frames1 = dst_frames;
+ while (dst_frames1 > 0) {
+ S1 = S2;
+ if (src_frames1-- > 0) {
+ S2 = *src;
+ src += src_step;
+ }
+ if (pos & ~R_MASK) {
+ pos &= R_MASK;
+ val = S1 + ((S2 - S1) * (signed int)pos) / BITS;
+ if (val < -32768)
+ val = -32768;
+ else if (val > 32767)
+ val = 32767;
+ *dst = val;
+ dst += dst_step;
+ dst_frames1--;
+ }
+ pos += data->pitch;
+ }
+ rchannels->last_S1 = S1;
+ rchannels->last_S2 = S2;
+ rchannels++;
+ }
+ data->pos = pos;
+}
+
+static snd_pcm_sframes_t rate_src_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
+{
+ struct rate_priv *data;
+ snd_pcm_sframes_t res;
+
+ if (snd_BUG_ON(!plugin))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+ data = (struct rate_priv *)plugin->extra_data;
+ if (plugin->src_format.rate < plugin->dst_format.rate) {
+ res = (((frames * data->pitch) + (BITS/2)) >> SHIFT);
+ } else {
+ res = DIV_ROUND_CLOSEST(frames << SHIFT, data->pitch);
+ }
+ if (data->old_src_frames > 0) {
+ snd_pcm_sframes_t frames1 = frames, res1 = data->old_dst_frames;
+ while (data->old_src_frames < frames1) {
+ frames1 >>= 1;
+ res1 <<= 1;
+ }
+ while (data->old_src_frames > frames1) {
+ frames1 <<= 1;
+ res1 >>= 1;
+ }
+ if (data->old_src_frames == frames1)
+ return res1;
+ }
+ data->old_src_frames = frames;
+ data->old_dst_frames = res;
+ return res;
+}
+
+static snd_pcm_sframes_t rate_dst_frames(struct snd_pcm_plugin *plugin, snd_pcm_uframes_t frames)
+{
+ struct rate_priv *data;
+ snd_pcm_sframes_t res;
+
+ if (snd_BUG_ON(!plugin))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+ data = (struct rate_priv *)plugin->extra_data;
+ if (plugin->src_format.rate < plugin->dst_format.rate) {
+ res = DIV_ROUND_CLOSEST(frames << SHIFT, data->pitch);
+ } else {
+ res = (((frames * data->pitch) + (BITS/2)) >> SHIFT);
+ }
+ if (data->old_dst_frames > 0) {
+ snd_pcm_sframes_t frames1 = frames, res1 = data->old_src_frames;
+ while (data->old_dst_frames < frames1) {
+ frames1 >>= 1;
+ res1 <<= 1;
+ }
+ while (data->old_dst_frames > frames1) {
+ frames1 <<= 1;
+ res1 >>= 1;
+ }
+ if (data->old_dst_frames == frames1)
+ return res1;
+ }
+ data->old_dst_frames = frames;
+ data->old_src_frames = res;
+ return res;
+}
+
+static snd_pcm_sframes_t rate_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ snd_pcm_uframes_t dst_frames;
+ struct rate_priv *data;
+
+ if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+#ifdef CONFIG_SND_DEBUG
+ {
+ unsigned int channel;
+ for (channel = 0; channel < plugin->src_format.channels; channel++) {
+ if (snd_BUG_ON(src_channels[channel].area.first % 8 ||
+ src_channels[channel].area.step % 8))
+ return -ENXIO;
+ if (snd_BUG_ON(dst_channels[channel].area.first % 8 ||
+ dst_channels[channel].area.step % 8))
+ return -ENXIO;
+ }
+ }
+#endif
+
+ dst_frames = rate_dst_frames(plugin, frames);
+ if (dst_frames > dst_channels[0].frames)
+ dst_frames = dst_channels[0].frames;
+ data = (struct rate_priv *)plugin->extra_data;
+ data->func(plugin, src_channels, dst_channels, frames, dst_frames);
+ return dst_frames;
+}
+
+static int rate_action(struct snd_pcm_plugin *plugin,
+ enum snd_pcm_plugin_action action,
+ unsigned long udata)
+{
+ if (snd_BUG_ON(!plugin))
+ return -ENXIO;
+ switch (action) {
+ case INIT:
+ case PREPARE:
+ rate_init(plugin);
+ break;
+ default:
+ break;
+ }
+ return 0; /* silenty ignore other actions */
+}
+
+int snd_pcm_plugin_build_rate(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
+{
+ int err;
+ struct rate_priv *data;
+ struct snd_pcm_plugin *plugin;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+
+ if (snd_BUG_ON(src_format->channels != dst_format->channels))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->channels <= 0))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->format != SNDRV_PCM_FORMAT_S16))
+ return -ENXIO;
+ if (snd_BUG_ON(dst_format->format != SNDRV_PCM_FORMAT_S16))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->rate == dst_format->rate))
+ return -ENXIO;
+
+ err = snd_pcm_plugin_build(plug, "rate conversion",
+ src_format, dst_format,
+ struct_size(data, channels,
+ src_format->channels),
+ &plugin);
+ if (err < 0)
+ return err;
+ data = (struct rate_priv *)plugin->extra_data;
+ if (src_format->rate < dst_format->rate) {
+ data->pitch = ((src_format->rate << SHIFT) + (dst_format->rate >> 1)) / dst_format->rate;
+ data->func = resample_expand;
+ } else {
+ data->pitch = ((dst_format->rate << SHIFT) + (src_format->rate >> 1)) / src_format->rate;
+ data->func = resample_shrink;
+ }
+ data->pos = 0;
+ rate_init(plugin);
+ data->old_src_frames = data->old_dst_frames = 0;
+ plugin->transfer = rate_transfer;
+ plugin->src_frames = rate_src_frames;
+ plugin->dst_frames = rate_dst_frames;
+ plugin->action = rate_action;
+ *r_plugin = plugin;
+ return 0;
+}
diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
new file mode 100644
index 0000000000..72dea04197
--- /dev/null
+++ b/sound/core/oss/route.c
@@ -0,0 +1,111 @@
+/*
+ * Route Plug-In
+ * Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include "pcm_plugin.h"
+
+static void zero_areas(struct snd_pcm_plugin_channel *dvp, int ndsts,
+ snd_pcm_uframes_t frames, snd_pcm_format_t format)
+{
+ int dst = 0;
+ for (; dst < ndsts; ++dst) {
+ if (dvp->wanted)
+ snd_pcm_area_silence(&dvp->area, 0, frames, format);
+ dvp->enabled = 0;
+ dvp++;
+ }
+}
+
+static inline void copy_area(const struct snd_pcm_plugin_channel *src_channel,
+ struct snd_pcm_plugin_channel *dst_channel,
+ snd_pcm_uframes_t frames, snd_pcm_format_t format)
+{
+ dst_channel->enabled = 1;
+ snd_pcm_area_copy(&src_channel->area, 0, &dst_channel->area, 0, frames, format);
+}
+
+static snd_pcm_sframes_t route_transfer(struct snd_pcm_plugin *plugin,
+ const struct snd_pcm_plugin_channel *src_channels,
+ struct snd_pcm_plugin_channel *dst_channels,
+ snd_pcm_uframes_t frames)
+{
+ int nsrcs, ndsts, dst;
+ struct snd_pcm_plugin_channel *dvp;
+ snd_pcm_format_t format;
+
+ if (snd_BUG_ON(!plugin || !src_channels || !dst_channels))
+ return -ENXIO;
+ if (frames == 0)
+ return 0;
+ if (frames > dst_channels[0].frames)
+ frames = dst_channels[0].frames;
+
+ nsrcs = plugin->src_format.channels;
+ ndsts = plugin->dst_format.channels;
+
+ format = plugin->dst_format.format;
+ dvp = dst_channels;
+ if (nsrcs <= 1) {
+ /* expand to all channels */
+ for (dst = 0; dst < ndsts; ++dst) {
+ copy_area(src_channels, dvp, frames, format);
+ dvp++;
+ }
+ return frames;
+ }
+
+ for (dst = 0; dst < ndsts && dst < nsrcs; ++dst) {
+ copy_area(src_channels, dvp, frames, format);
+ dvp++;
+ src_channels++;
+ }
+ if (dst < ndsts)
+ zero_areas(dvp, ndsts - dst, frames, format);
+ return frames;
+}
+
+int snd_pcm_plugin_build_route(struct snd_pcm_substream *plug,
+ struct snd_pcm_plugin_format *src_format,
+ struct snd_pcm_plugin_format *dst_format,
+ struct snd_pcm_plugin **r_plugin)
+{
+ struct snd_pcm_plugin *plugin;
+ int err;
+
+ if (snd_BUG_ON(!r_plugin))
+ return -ENXIO;
+ *r_plugin = NULL;
+ if (snd_BUG_ON(src_format->rate != dst_format->rate))
+ return -ENXIO;
+ if (snd_BUG_ON(src_format->format != dst_format->format))
+ return -ENXIO;
+
+ err = snd_pcm_plugin_build(plug, "route conversion",
+ src_format, dst_format, 0, &plugin);
+ if (err < 0)
+ return err;
+
+ plugin->transfer = route_transfer;
+ *r_plugin = plugin;
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 00:54:54 +0000