2065 lines
66 KiB
C
2065 lines
66 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2009 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
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***/
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#include "config.h"
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#include <sys/types.h>
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#include <alsa/asoundlib.h>
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#include "alsa-util.h"
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#include "alsa-mixer.h"
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#include <spa/param/audio/format.h>
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#ifdef HAVE_UDEV
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#include <modules/udev-util.h>
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#endif
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static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) {
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static const snd_pcm_format_t format_trans[] = {
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[PA_SAMPLE_U8] = SND_PCM_FORMAT_U8,
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[PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
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[PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
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[PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
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[PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
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[PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
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[PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
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[PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
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[PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
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[PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
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[PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
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[PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
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[PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE,
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};
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static const pa_sample_format_t try_order[] = {
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PA_SAMPLE_FLOAT32NE,
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PA_SAMPLE_FLOAT32RE,
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PA_SAMPLE_S32NE,
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PA_SAMPLE_S32RE,
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PA_SAMPLE_S24_32NE,
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PA_SAMPLE_S24_32RE,
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PA_SAMPLE_S24NE,
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PA_SAMPLE_S24RE,
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PA_SAMPLE_S16NE,
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PA_SAMPLE_S16RE,
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PA_SAMPLE_ALAW,
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PA_SAMPLE_ULAW,
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PA_SAMPLE_U8
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};
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unsigned i;
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int ret;
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pa_assert(pcm_handle);
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pa_assert(hwparams);
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pa_assert(f);
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if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
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return ret;
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pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
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snd_pcm_format_description(format_trans[*f]),
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pa_alsa_strerror(ret));
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if (*f == PA_SAMPLE_FLOAT32BE)
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*f = PA_SAMPLE_FLOAT32LE;
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else if (*f == PA_SAMPLE_FLOAT32LE)
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*f = PA_SAMPLE_FLOAT32BE;
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else if (*f == PA_SAMPLE_S24BE)
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*f = PA_SAMPLE_S24LE;
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else if (*f == PA_SAMPLE_S24LE)
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*f = PA_SAMPLE_S24BE;
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else if (*f == PA_SAMPLE_S24_32BE)
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*f = PA_SAMPLE_S24_32LE;
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else if (*f == PA_SAMPLE_S24_32LE)
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*f = PA_SAMPLE_S24_32BE;
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else if (*f == PA_SAMPLE_S16BE)
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*f = PA_SAMPLE_S16LE;
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else if (*f == PA_SAMPLE_S16LE)
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*f = PA_SAMPLE_S16BE;
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else if (*f == PA_SAMPLE_S32BE)
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*f = PA_SAMPLE_S32LE;
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else if (*f == PA_SAMPLE_S32LE)
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*f = PA_SAMPLE_S32BE;
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else
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goto try_auto;
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if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
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return ret;
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pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
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snd_pcm_format_description(format_trans[*f]),
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pa_alsa_strerror(ret));
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try_auto:
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for (i = 0; i < PA_ELEMENTSOF(try_order); i++) {
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*f = try_order[i];
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if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
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return ret;
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pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
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snd_pcm_format_description(format_trans[*f]),
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pa_alsa_strerror(ret));
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}
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return -1;
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}
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static int set_period_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) {
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snd_pcm_uframes_t s;
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int d, ret;
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pa_assert(pcm_handle);
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pa_assert(hwparams);
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s = size;
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d = 0;
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if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) {
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s = size;
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d = -1;
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if (snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d) < 0) {
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s = size;
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d = 1;
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if ((ret = snd_pcm_hw_params_set_period_size_near(pcm_handle, hwparams, &s, &d)) < 0) {
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pa_log_info("snd_pcm_hw_params_set_period_size_near() failed: %s", pa_alsa_strerror(ret));
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return ret;
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}
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}
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}
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return 0;
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}
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static int set_buffer_size(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, snd_pcm_uframes_t size) {
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int ret;
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pa_assert(pcm_handle);
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pa_assert(hwparams);
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if ((ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &size)) < 0) {
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pa_log_info("snd_pcm_hw_params_set_buffer_size_near() failed: %s", pa_alsa_strerror(ret));
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return ret;
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}
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return 0;
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}
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static void check_access(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, bool use_mmap) {
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if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) ||
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!snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED))
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pa_log_error("Weird, PCM claims to support interleaved access, but snd_pcm_hw_params_set_access() failed.");
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if ((use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_NONINTERLEAVED)) ||
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!snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_NONINTERLEAVED))
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pa_log_debug("PCM seems to support non-interleaved access, but PA doesn't.");
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else if (use_mmap && !snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_COMPLEX)) {
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pa_log_debug("PCM seems to support mmapped complex access, but PA doesn't.");
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}
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}
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/* Set the hardware parameters of the given ALSA device. Returns the
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* selected fragment settings in *buffer_size and *period_size. Determine
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* whether mmap and tsched mode can be enabled. */
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int pa_alsa_set_hw_params(
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snd_pcm_t *pcm_handle,
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pa_sample_spec *ss,
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snd_pcm_uframes_t *period_size,
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snd_pcm_uframes_t *buffer_size,
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snd_pcm_uframes_t tsched_size,
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bool *use_mmap,
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bool *use_tsched,
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bool require_exact_channel_number) {
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int ret = -1;
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snd_pcm_hw_params_t *hwparams, *hwparams_copy;
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int dir;
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snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
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snd_pcm_uframes_t _buffer_size = buffer_size ? *buffer_size : 0;
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bool _use_mmap = use_mmap && *use_mmap;
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bool _use_tsched = use_tsched && *use_tsched;
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pa_sample_spec _ss = *ss;
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pa_assert(pcm_handle);
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pa_assert(ss);
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snd_pcm_hw_params_alloca(&hwparams);
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snd_pcm_hw_params_alloca(&hwparams_copy);
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if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
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pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
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goto finish;
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}
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if ((ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_rate_resample() failed: %s", pa_alsa_strerror(ret));
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goto finish;
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}
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if (_use_mmap) {
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if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
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/* mmap() didn't work, fall back to interleaved */
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if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
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check_access(pcm_handle, hwparams, true);
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goto finish;
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}
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_use_mmap = false;
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}
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} else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
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check_access(pcm_handle, hwparams, false);
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goto finish;
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}
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if (!_use_mmap)
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_use_tsched = false;
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if (!pa_alsa_pcm_is_hw(pcm_handle))
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_use_tsched = false;
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/* The PCM pointer is only updated with period granularity */
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if (snd_pcm_hw_params_is_batch(hwparams)) {
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bool is_usb = false;
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const char *id;
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snd_pcm_info_t* pcm_info;
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snd_pcm_info_alloca(&pcm_info);
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if (snd_pcm_info(pcm_handle, pcm_info) == 0 &&
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(id = snd_pcm_info_get_id(pcm_info))) {
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/* This horrible hack makes sure we don't disable tsched on USB
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* devices, which have a low enough transfer size for timer-based
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* scheduling to work. This can go away when the ALSA API supports
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* querying the block transfer size. */
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if (pa_streq(id, "USB Audio"))
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is_usb = true;
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}
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if (!is_usb) {
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pa_log_info("Disabling tsched mode since BATCH flag is set");
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_use_tsched = false;
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}
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}
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#if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */
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if (_use_tsched) {
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/* try to disable period wakeups if hardware can do so */
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if (snd_pcm_hw_params_can_disable_period_wakeup(hwparams)) {
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if ((ret = snd_pcm_hw_params_set_period_wakeup(pcm_handle, hwparams, false)) < 0)
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/* don't bail, keep going with default mode with period wakeups */
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pa_log_debug("snd_pcm_hw_params_set_period_wakeup() failed: %s", pa_alsa_strerror(ret));
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else
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pa_log_info("Trying to disable ALSA period wakeups, using timers only");
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} else
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pa_log_info("Cannot disable ALSA period wakeups");
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}
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#endif
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if ((ret = set_format(pcm_handle, hwparams, &_ss.format)) < 0)
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goto finish;
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if ((ret = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &_ss.rate, NULL)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret));
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goto finish;
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}
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/* We ignore very small sampling rate deviations */
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if (_ss.rate >= ss->rate*.95 && _ss.rate <= ss->rate*1.05)
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_ss.rate = ss->rate;
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if (require_exact_channel_number) {
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if ((ret = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, _ss.channels)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_channels(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret));
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goto finish;
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}
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} else {
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unsigned int c = _ss.channels;
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if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0) {
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pa_log_debug("snd_pcm_hw_params_set_channels_near(%u) failed: %s", _ss.channels, pa_alsa_strerror(ret));
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goto finish;
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}
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_ss.channels = c;
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}
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if (_use_tsched && tsched_size > 0) {
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_buffer_size = (snd_pcm_uframes_t) (((uint64_t) tsched_size * _ss.rate) / ss->rate);
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_period_size = _buffer_size;
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} else {
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_period_size = (snd_pcm_uframes_t) (((uint64_t) _period_size * _ss.rate) / ss->rate);
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_buffer_size = (snd_pcm_uframes_t) (((uint64_t) _buffer_size * _ss.rate) / ss->rate);
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}
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if (_buffer_size > 0 || _period_size > 0) {
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snd_pcm_uframes_t max_frames = 0;
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if ((ret = snd_pcm_hw_params_get_buffer_size_max(hwparams, &max_frames)) < 0)
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pa_log_warn("snd_pcm_hw_params_get_buffer_size_max() failed: %s", pa_alsa_strerror(ret));
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else
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pa_log_debug("Maximum hw buffer size is %lu ms", (long unsigned) (max_frames * PA_MSEC_PER_SEC / _ss.rate));
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/* Some ALSA drivers really don't like if we set the buffer
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* size first and the number of periods second (which would
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* make a lot more sense to me). So, try a few combinations
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* before we give up. */
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if (_buffer_size > 0 && _period_size > 0) {
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snd_pcm_hw_params_copy(hwparams_copy, hwparams);
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/* First try: set buffer size first, followed by period size */
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if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
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set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
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snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
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pa_log_debug("Set buffer size first (to %lu samples), period size second (to %lu samples).", (unsigned long) _buffer_size, (unsigned long) _period_size);
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goto success;
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}
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snd_pcm_hw_params_copy(hwparams_copy, hwparams);
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/* Second try: set period size first, followed by buffer size */
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if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
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set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
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snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
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pa_log_debug("Set period size first (to %lu samples), buffer size second (to %lu samples).", (unsigned long) _period_size, (unsigned long) _buffer_size);
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goto success;
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}
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}
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if (_buffer_size > 0) {
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snd_pcm_hw_params_copy(hwparams_copy, hwparams);
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/* Third try: set only buffer size */
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if (set_buffer_size(pcm_handle, hwparams_copy, _buffer_size) >= 0 &&
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snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
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pa_log_debug("Set only buffer size (to %lu samples).", (unsigned long) _buffer_size);
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goto success;
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}
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}
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|
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if (_period_size > 0) {
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snd_pcm_hw_params_copy(hwparams_copy, hwparams);
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/* Fourth try: set only period size */
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if (set_period_size(pcm_handle, hwparams_copy, _period_size) >= 0 &&
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snd_pcm_hw_params(pcm_handle, hwparams_copy) >= 0) {
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pa_log_debug("Set only period size (to %lu samples).", (unsigned long) _period_size);
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goto success;
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}
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}
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}
|
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|
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pa_log_debug("Set neither period nor buffer size.");
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|
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/* Last chance, set nothing */
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if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
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pa_log_info("snd_pcm_hw_params failed: %s", pa_alsa_strerror(ret));
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goto finish;
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}
|
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|
|
success:
|
|
|
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if (ss->rate != _ss.rate)
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pa_log_info("Device %s doesn't support %u Hz, changed to %u Hz.", snd_pcm_name(pcm_handle), ss->rate, _ss.rate);
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|
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if (ss->channels != _ss.channels)
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pa_log_info("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), ss->channels, _ss.channels);
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|
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if (ss->format != _ss.format)
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pa_log_info("Device %s doesn't support sample format %s, changed to %s.", snd_pcm_name(pcm_handle), pa_sample_format_to_string(ss->format), pa_sample_format_to_string(_ss.format));
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|
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if ((ret = snd_pcm_hw_params_current(pcm_handle, hwparams)) < 0) {
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pa_log_info("snd_pcm_hw_params_current() failed: %s", pa_alsa_strerror(ret));
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goto finish;
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}
|
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|
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if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
|
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(ret = snd_pcm_hw_params_get_buffer_size(hwparams, &_buffer_size)) < 0) {
|
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pa_log_info("snd_pcm_hw_params_get_{period|buffer}_size() failed: %s", pa_alsa_strerror(ret));
|
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goto finish;
|
|
}
|
|
|
|
#if (SND_LIB_VERSION >= ((1<<16)|(0<<8)|24)) /* API additions in 1.0.24 */
|
|
if (_use_tsched) {
|
|
unsigned int no_wakeup;
|
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/* see if period wakeups were disabled */
|
|
snd_pcm_hw_params_get_period_wakeup(pcm_handle, hwparams, &no_wakeup);
|
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if (no_wakeup == 0)
|
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pa_log_info("ALSA period wakeups disabled");
|
|
else
|
|
pa_log_info("ALSA period wakeups were not disabled");
|
|
}
|
|
#endif
|
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|
|
ss->rate = _ss.rate;
|
|
ss->channels = _ss.channels;
|
|
ss->format = _ss.format;
|
|
|
|
pa_assert(_period_size > 0);
|
|
pa_assert(_buffer_size > 0);
|
|
|
|
if (buffer_size)
|
|
*buffer_size = _buffer_size;
|
|
|
|
if (period_size)
|
|
*period_size = _period_size;
|
|
|
|
if (use_mmap)
|
|
*use_mmap = _use_mmap;
|
|
|
|
if (use_tsched)
|
|
*use_tsched = _use_tsched;
|
|
|
|
ret = 0;
|
|
|
|
finish:
|
|
|
|
return ret;
|
|
}
|
|
|
|
int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min, bool period_event) {
|
|
snd_pcm_sw_params_t *swparams;
|
|
snd_pcm_uframes_t boundary;
|
|
int err;
|
|
|
|
pa_assert(pcm);
|
|
|
|
snd_pcm_sw_params_alloca(&swparams);
|
|
|
|
if ((err = snd_pcm_sw_params_current(pcm, swparams)) < 0) {
|
|
pa_log_warn("Unable to determine current swparams: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, period_event)) < 0) {
|
|
pa_log_warn("Unable to disable period event: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
|
|
pa_log_warn("Unable to enable time stamping: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
|
|
pa_log_warn("Unable to get boundary: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
|
|
pa_log_warn("Unable to set stop threshold: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) {
|
|
pa_log_warn("Unable to set start threshold: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
|
|
pa_log_error("snd_pcm_sw_params_set_avail_min() failed: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
|
|
pa_log_warn("Unable to set sw params: %s", pa_alsa_strerror(err));
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
snd_pcm_t *pa_alsa_open_by_device_id_auto(
|
|
const char *dev_id,
|
|
char **dev,
|
|
pa_sample_spec *ss,
|
|
pa_channel_map* map,
|
|
int mode,
|
|
snd_pcm_uframes_t *period_size,
|
|
snd_pcm_uframes_t *buffer_size,
|
|
snd_pcm_uframes_t tsched_size,
|
|
bool *use_mmap,
|
|
bool *use_tsched,
|
|
pa_sample_format_t **query_supported_formats,
|
|
unsigned int **query_supported_rates,
|
|
pa_alsa_profile_set *ps,
|
|
pa_alsa_mapping **mapping) {
|
|
|
|
char *d;
|
|
snd_pcm_t *pcm_handle;
|
|
void *state;
|
|
pa_alsa_mapping *m;
|
|
|
|
pa_assert(dev_id);
|
|
pa_assert(dev);
|
|
pa_assert(ss);
|
|
pa_assert(map);
|
|
pa_assert(ps);
|
|
|
|
/* First we try to find a device string with a superset of the
|
|
* requested channel map. We iterate through our device table from
|
|
* top to bottom and take the first that matches. If we didn't
|
|
* find a working device that way, we iterate backwards, and check
|
|
* all devices that do not provide a superset of the requested
|
|
* channel map.*/
|
|
|
|
PA_HASHMAP_FOREACH(m, ps->mappings, state) {
|
|
if (!pa_channel_map_superset(&m->channel_map, map))
|
|
continue;
|
|
|
|
pa_log_debug("Checking for superset %s (%s)", m->name, m->device_strings[0]);
|
|
|
|
pcm_handle = pa_alsa_open_by_device_id_mapping(
|
|
dev_id,
|
|
dev,
|
|
ss,
|
|
map,
|
|
mode,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
query_supported_formats,
|
|
query_supported_rates,
|
|
m);
|
|
|
|
if (pcm_handle) {
|
|
if (mapping)
|
|
*mapping = m;
|
|
|
|
return pcm_handle;
|
|
}
|
|
}
|
|
|
|
PA_HASHMAP_FOREACH_BACKWARDS(m, ps->mappings, state) {
|
|
if (pa_channel_map_superset(&m->channel_map, map))
|
|
continue;
|
|
|
|
pa_log_debug("Checking for subset %s (%s)", m->name, m->device_strings[0]);
|
|
|
|
pcm_handle = pa_alsa_open_by_device_id_mapping(
|
|
dev_id,
|
|
dev,
|
|
ss,
|
|
map,
|
|
mode,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
query_supported_formats,
|
|
query_supported_rates,
|
|
m);
|
|
|
|
if (pcm_handle) {
|
|
if (mapping)
|
|
*mapping = m;
|
|
|
|
return pcm_handle;
|
|
}
|
|
}
|
|
|
|
/* OK, we didn't find any good device, so let's try the raw hw: stuff */
|
|
d = pa_sprintf_malloc("hw:%s", dev_id);
|
|
pa_log_debug("Trying %s as last resort...", d);
|
|
pcm_handle = pa_alsa_open_by_device_string(
|
|
d,
|
|
dev,
|
|
ss,
|
|
map,
|
|
mode,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
query_supported_formats,
|
|
query_supported_rates,
|
|
false);
|
|
pa_xfree(d);
|
|
|
|
if (pcm_handle && mapping)
|
|
*mapping = NULL;
|
|
|
|
return pcm_handle;
|
|
}
|
|
#endif
|
|
|
|
snd_pcm_t *pa_alsa_open_by_device_id_mapping(
|
|
const char *dev_id,
|
|
char **dev,
|
|
pa_sample_spec *ss,
|
|
pa_channel_map* map,
|
|
int mode,
|
|
snd_pcm_uframes_t *period_size,
|
|
snd_pcm_uframes_t *buffer_size,
|
|
snd_pcm_uframes_t tsched_size,
|
|
bool *use_mmap,
|
|
bool *use_tsched,
|
|
pa_sample_format_t **query_supported_formats,
|
|
unsigned int **query_supported_rates,
|
|
pa_alsa_mapping *m) {
|
|
|
|
snd_pcm_t *pcm_handle;
|
|
pa_sample_spec try_ss;
|
|
pa_channel_map try_map;
|
|
|
|
pa_assert(dev_id);
|
|
pa_assert(dev);
|
|
pa_assert(ss);
|
|
pa_assert(map);
|
|
pa_assert(m);
|
|
|
|
try_ss.channels = m->channel_map.channels;
|
|
try_ss.rate = ss->rate;
|
|
try_ss.format = ss->format;
|
|
try_map = m->channel_map;
|
|
|
|
pcm_handle = pa_alsa_open_by_template(
|
|
m->device_strings,
|
|
dev_id,
|
|
dev,
|
|
&try_ss,
|
|
&try_map,
|
|
mode,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
query_supported_formats,
|
|
query_supported_rates,
|
|
pa_channel_map_valid(&m->channel_map) /* Query the channel count if we don't know what we want */);
|
|
|
|
if (!pcm_handle)
|
|
return NULL;
|
|
|
|
*ss = try_ss;
|
|
*map = try_map;
|
|
pa_assert(map->channels == ss->channels);
|
|
|
|
return pcm_handle;
|
|
}
|
|
|
|
int pa_alsa_close(snd_pcm_t **pcm)
|
|
{
|
|
int err;
|
|
pa_assert(pcm);
|
|
pa_log_info("ALSA device close %p", *pcm);
|
|
if (*pcm == NULL)
|
|
return 0;
|
|
if ((err = snd_pcm_close(*pcm)) < 0) {
|
|
pa_log_warn("ALSA close failed: %s", snd_strerror(err));
|
|
}
|
|
*pcm = NULL;
|
|
return err;
|
|
}
|
|
|
|
snd_pcm_t *pa_alsa_open_by_device_string(
|
|
const char *device,
|
|
char **dev,
|
|
pa_sample_spec *ss,
|
|
pa_channel_map* map,
|
|
int mode,
|
|
snd_pcm_uframes_t *period_size,
|
|
snd_pcm_uframes_t *buffer_size,
|
|
snd_pcm_uframes_t tsched_size,
|
|
bool *use_mmap,
|
|
bool *use_tsched,
|
|
pa_sample_format_t **query_supported_formats,
|
|
unsigned int **query_supported_rates,
|
|
bool require_exact_channel_number) {
|
|
|
|
int err;
|
|
char *d;
|
|
snd_pcm_t *pcm_handle;
|
|
bool reformat = false;
|
|
|
|
pa_assert(device);
|
|
pa_assert(ss);
|
|
pa_assert(map);
|
|
|
|
d = pa_xstrdup(device);
|
|
|
|
for (;;) {
|
|
pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with");
|
|
|
|
if ((err = snd_pcm_open(&pcm_handle, d, mode,
|
|
SND_PCM_NONBLOCK|
|
|
SND_PCM_NO_AUTO_RESAMPLE|
|
|
SND_PCM_NO_AUTO_CHANNELS|
|
|
(reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) {
|
|
pa_log_info("Error opening PCM device %s: %s", d, pa_alsa_strerror(err));
|
|
goto fail;
|
|
}
|
|
pa_log_info("ALSA device open '%s' %s: %p", d,
|
|
mode == SND_PCM_STREAM_CAPTURE ? "capture" : "playback", pcm_handle);
|
|
|
|
if (query_supported_formats)
|
|
*query_supported_formats = pa_alsa_get_supported_formats(pcm_handle, ss->format);
|
|
|
|
if (query_supported_rates)
|
|
*query_supported_rates = pa_alsa_get_supported_rates(pcm_handle, ss->rate);
|
|
|
|
if ((err = pa_alsa_set_hw_params(
|
|
pcm_handle,
|
|
ss,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
require_exact_channel_number)) < 0) {
|
|
|
|
if (!reformat) {
|
|
reformat = true;
|
|
|
|
pa_alsa_close(&pcm_handle);
|
|
continue;
|
|
}
|
|
|
|
/* Hmm, some hw is very exotic, so we retry with plug, if without it didn't work */
|
|
if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) {
|
|
char *t;
|
|
|
|
t = pa_sprintf_malloc("plug:SLAVE='%s'", d);
|
|
pa_xfree(d);
|
|
d = t;
|
|
|
|
reformat = false;
|
|
|
|
pa_alsa_close(&pcm_handle);
|
|
continue;
|
|
}
|
|
|
|
pa_log_info("Failed to set hardware parameters on %s: %s", d, pa_alsa_strerror(err));
|
|
pa_alsa_close(&pcm_handle);
|
|
|
|
goto fail;
|
|
}
|
|
|
|
if (ss->channels > PA_CHANNELS_MAX) {
|
|
pa_log("Device %s has %u channels, but PulseAudio supports only %u channels. Unable to use the device.",
|
|
d, ss->channels, PA_CHANNELS_MAX);
|
|
pa_alsa_close(&pcm_handle);
|
|
goto fail;
|
|
}
|
|
|
|
if (dev)
|
|
*dev = d;
|
|
else
|
|
pa_xfree(d);
|
|
|
|
if (ss->channels != map->channels)
|
|
pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_ALSA);
|
|
|
|
return pcm_handle;
|
|
}
|
|
|
|
fail:
|
|
pa_xfree(d);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
snd_pcm_t *pa_alsa_open_by_template(
|
|
char **template,
|
|
const char *dev_id,
|
|
char **dev,
|
|
pa_sample_spec *ss,
|
|
pa_channel_map* map,
|
|
int mode,
|
|
snd_pcm_uframes_t *period_size,
|
|
snd_pcm_uframes_t *buffer_size,
|
|
snd_pcm_uframes_t tsched_size,
|
|
bool *use_mmap,
|
|
bool *use_tsched,
|
|
pa_sample_format_t **query_supported_formats,
|
|
unsigned int **query_supported_rates,
|
|
bool require_exact_channel_number) {
|
|
|
|
snd_pcm_t *pcm_handle;
|
|
char **i;
|
|
|
|
for (i = template; *i; i++) {
|
|
char *d;
|
|
|
|
d = pa_replace(*i, "%f", dev_id);
|
|
|
|
pcm_handle = pa_alsa_open_by_device_string(
|
|
d,
|
|
dev,
|
|
ss,
|
|
map,
|
|
mode,
|
|
period_size,
|
|
buffer_size,
|
|
tsched_size,
|
|
use_mmap,
|
|
use_tsched,
|
|
query_supported_formats,
|
|
query_supported_rates,
|
|
require_exact_channel_number);
|
|
|
|
pa_xfree(d);
|
|
|
|
if (pcm_handle)
|
|
return pcm_handle;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void pa_alsa_dump(pa_log_level_t level, snd_pcm_t *pcm) {
|
|
int err;
|
|
snd_output_t *out;
|
|
|
|
pa_assert(pcm);
|
|
|
|
pa_assert_se(snd_output_buffer_open(&out) == 0);
|
|
|
|
if ((err = snd_pcm_dump(pcm, out)) < 0)
|
|
pa_logl(level, "snd_pcm_dump(): %s", pa_alsa_strerror(err));
|
|
else {
|
|
char *s = NULL;
|
|
snd_output_buffer_string(out, &s);
|
|
pa_logl(level, "snd_pcm_dump():\n%s", pa_strnull(s));
|
|
}
|
|
|
|
pa_assert_se(snd_output_close(out) == 0);
|
|
}
|
|
|
|
#if 0
|
|
void pa_alsa_dump_status(snd_pcm_t *pcm) {
|
|
int err;
|
|
snd_output_t *out;
|
|
snd_pcm_status_t *status;
|
|
char *s = NULL;
|
|
|
|
pa_assert(pcm);
|
|
|
|
snd_pcm_status_alloca(&status);
|
|
|
|
if ((err = snd_output_buffer_open(&out)) < 0) {
|
|
pa_log_debug("snd_output_buffer_open() failed: %s", pa_cstrerror(err));
|
|
return;
|
|
}
|
|
|
|
if ((err = snd_pcm_status(pcm, status)) < 0) {
|
|
pa_log_debug("snd_pcm_status() failed: %s", pa_cstrerror(err));
|
|
goto finish;
|
|
}
|
|
|
|
if ((err = snd_pcm_status_dump(status, out)) < 0) {
|
|
pa_log_debug("snd_pcm_status_dump(): %s", pa_alsa_strerror(err));
|
|
goto finish;
|
|
}
|
|
|
|
snd_output_buffer_string(out, &s);
|
|
pa_log_debug("snd_pcm_status_dump():\n%s", pa_strnull(s));
|
|
|
|
finish:
|
|
|
|
snd_output_close(out);
|
|
}
|
|
#endif
|
|
|
|
static PA_PRINTF_FUNC(5,0) void alsa_local_handler(const char *file, int line, const char *function, int err, const char *fmt, va_list arg) {
|
|
pa_log_levelv_meta(PA_LOG_INFO, file, line, function, fmt, arg);
|
|
}
|
|
|
|
static PA_PRINTF_FUNC(5,6) void alsa_error_handler(const char *file, int line, const char *function, int err, const char *fmt,...) {
|
|
va_list ap;
|
|
// char *alsa_file;
|
|
|
|
// alsa_file = pa_sprintf_malloc("(alsa-lib)%s", file);
|
|
|
|
va_start(ap, fmt);
|
|
|
|
pa_log_levelv_meta(PA_LOG_INFO, file, line, function, fmt, ap);
|
|
|
|
va_end(ap);
|
|
|
|
// pa_xfree(alsa_file);
|
|
}
|
|
|
|
static int n_error_handler_installed = 0;
|
|
|
|
typedef void (*snd_lib2_error_handler_t)(const char *file, int line, const char *function, int err, const char *fmt, ...) PA_PRINTF_FUNC(5,6) /* __attribute__ ((format (printf, 5, 6))) */;
|
|
typedef void (*snd_lib2_local_handler_t)(const char *file, int line, const char *function, int err, const char *fmt, va_list args) PA_PRINTF_FUNC(5,0) /* __attribute__ ((format (printf, 5, 0))) */;
|
|
|
|
extern int snd_lib_error_set_handler(snd_lib2_error_handler_t handler);
|
|
extern snd_local_error_handler_t snd_lib_error_set_local(snd_lib2_local_handler_t handler);
|
|
|
|
void pa_alsa_refcnt_inc(void) {
|
|
/* This is not really thread safe, but we do our best */
|
|
if (n_error_handler_installed++ == 0) {
|
|
snd_lib_error_set_handler(alsa_error_handler);
|
|
snd_lib_error_set_local(alsa_local_handler);
|
|
}
|
|
}
|
|
|
|
void pa_alsa_refcnt_dec(void) {
|
|
int r;
|
|
|
|
pa_assert_se((r = n_error_handler_installed--) >= 1);
|
|
|
|
if (r == 1) {
|
|
snd_lib_error_set_handler(NULL);
|
|
snd_lib_error_set_local(NULL);
|
|
snd_config_update_free_global();
|
|
}
|
|
}
|
|
|
|
bool pa_alsa_init_description(pa_proplist *p, pa_card *card) {
|
|
const char *d, *k;
|
|
pa_assert(p);
|
|
|
|
if (pa_alsa_device_init_description(p, card))
|
|
return true;
|
|
|
|
if (!(d = pa_proplist_gets(p, "alsa.card_name")))
|
|
d = pa_proplist_gets(p, "alsa.name");
|
|
|
|
if (!d)
|
|
return false;
|
|
|
|
k = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_DESCRIPTION);
|
|
|
|
if (d && k)
|
|
pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, "%s %s", d, k);
|
|
else if (d)
|
|
pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, d);
|
|
|
|
return false;
|
|
}
|
|
|
|
void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card) {
|
|
char *cn, *lcn, *dn, name[64];
|
|
|
|
pa_assert(p);
|
|
pa_assert(card >= 0);
|
|
|
|
pa_proplist_setf(p, "alsa.card", "%i", card);
|
|
|
|
if (snd_card_get_name(card, &cn) >= 0) {
|
|
pa_proplist_sets(p, "alsa.card_name", pa_strip(cn));
|
|
free(cn);
|
|
}
|
|
|
|
if (snd_card_get_longname(card, &lcn) >= 0) {
|
|
pa_proplist_sets(p, "alsa.long_card_name", pa_strip(lcn));
|
|
free(lcn);
|
|
}
|
|
|
|
if ((dn = pa_alsa_get_driver_name(card))) {
|
|
pa_proplist_sets(p, "alsa.driver_name", dn);
|
|
pa_xfree(dn);
|
|
}
|
|
|
|
snprintf(name, sizeof(name), "hw:%d", card);
|
|
pa_alsa_init_proplist_ctl(p, name);
|
|
|
|
#ifdef HAVE_UDEV
|
|
pa_udev_get_info(card, p);
|
|
#endif
|
|
}
|
|
|
|
void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info) {
|
|
|
|
static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = {
|
|
[SND_PCM_CLASS_GENERIC] = "generic",
|
|
[SND_PCM_CLASS_MULTI] = "multi",
|
|
[SND_PCM_CLASS_MODEM] = "modem",
|
|
[SND_PCM_CLASS_DIGITIZER] = "digitizer"
|
|
};
|
|
static const char * const class_table[SND_PCM_CLASS_LAST+1] = {
|
|
[SND_PCM_CLASS_GENERIC] = "sound",
|
|
[SND_PCM_CLASS_MULTI] = NULL,
|
|
[SND_PCM_CLASS_MODEM] = "modem",
|
|
[SND_PCM_CLASS_DIGITIZER] = NULL
|
|
};
|
|
static const char * const alsa_subclass_table[SND_PCM_SUBCLASS_LAST+1] = {
|
|
[SND_PCM_SUBCLASS_GENERIC_MIX] = "generic-mix",
|
|
[SND_PCM_SUBCLASS_MULTI_MIX] = "multi-mix"
|
|
};
|
|
|
|
snd_pcm_class_t class;
|
|
snd_pcm_subclass_t subclass;
|
|
const char *n, *id, *sdn;
|
|
int card;
|
|
snd_pcm_sync_id_t sync_id;
|
|
|
|
pa_assert(p);
|
|
pa_assert(pcm_info);
|
|
|
|
if ((card = snd_pcm_info_get_card(pcm_info)) >= 0)
|
|
pa_alsa_init_proplist_card(c, p, card);
|
|
|
|
pa_proplist_sets(p, PA_PROP_DEVICE_API, "alsa");
|
|
|
|
if ((class = snd_pcm_info_get_class(pcm_info)) <= SND_PCM_CLASS_LAST) {
|
|
if (class_table[class])
|
|
pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, class_table[class]);
|
|
if (alsa_class_table[class])
|
|
pa_proplist_sets(p, "alsa.class", alsa_class_table[class]);
|
|
}
|
|
|
|
if ((subclass = snd_pcm_info_get_subclass(pcm_info)) <= SND_PCM_SUBCLASS_LAST)
|
|
if (alsa_subclass_table[subclass])
|
|
pa_proplist_sets(p, "alsa.subclass", alsa_subclass_table[subclass]);
|
|
|
|
if ((n = snd_pcm_info_get_name(pcm_info))) {
|
|
char *t = pa_xstrdup(n);
|
|
pa_proplist_sets(p, "alsa.name", pa_strip(t));
|
|
pa_xfree(t);
|
|
}
|
|
|
|
if ((id = snd_pcm_info_get_id(pcm_info)))
|
|
pa_proplist_sets(p, "alsa.id", id);
|
|
|
|
pa_proplist_setf(p, "alsa.subdevice", "%u", snd_pcm_info_get_subdevice(pcm_info));
|
|
if ((sdn = snd_pcm_info_get_subdevice_name(pcm_info)))
|
|
pa_proplist_sets(p, "alsa.subdevice_name", sdn);
|
|
|
|
pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info));
|
|
|
|
sync_id = snd_pcm_info_get_sync(pcm_info);
|
|
pa_proplist_setf(p, "alsa.sync.id", "%08x:%08x:%08x:%08x",
|
|
sync_id.id32[0], sync_id.id32[1], sync_id.id32[2], sync_id.id32[3]);
|
|
}
|
|
|
|
void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm) {
|
|
snd_pcm_hw_params_t *hwparams;
|
|
snd_pcm_info_t *info;
|
|
int bits, err;
|
|
|
|
snd_pcm_hw_params_alloca(&hwparams);
|
|
snd_pcm_info_alloca(&info);
|
|
|
|
if ((err = snd_pcm_hw_params_current(pcm, hwparams)) < 0)
|
|
pa_log_warn("Error fetching hardware parameter info: %s", pa_alsa_strerror(err));
|
|
else {
|
|
|
|
if ((bits = snd_pcm_hw_params_get_sbits(hwparams)) >= 0)
|
|
pa_proplist_setf(p, "alsa.resolution_bits", "%i", bits);
|
|
}
|
|
|
|
if ((err = snd_pcm_info(pcm, info)) < 0)
|
|
pa_log_warn("Error fetching PCM info: %s", pa_alsa_strerror(err));
|
|
else
|
|
pa_alsa_init_proplist_pcm_info(c, p, info);
|
|
}
|
|
|
|
void pa_alsa_init_proplist_ctl(pa_proplist *p, const char *name) {
|
|
int err;
|
|
snd_ctl_t *ctl;
|
|
snd_ctl_card_info_t *info;
|
|
const char *t;
|
|
|
|
pa_assert(p);
|
|
|
|
snd_ctl_card_info_alloca(&info);
|
|
|
|
if ((err = snd_ctl_open(&ctl, name, 0)) < 0) {
|
|
pa_log_warn("Error opening low-level control device '%s': %s", name, snd_strerror(err));
|
|
return;
|
|
}
|
|
|
|
if ((err = snd_ctl_card_info(ctl, info)) < 0) {
|
|
pa_log_warn("Control device %s card info: %s", name, snd_strerror(err));
|
|
snd_ctl_close(ctl);
|
|
return;
|
|
}
|
|
|
|
if ((t = snd_ctl_card_info_get_mixername(info)) && *t)
|
|
pa_proplist_sets(p, "alsa.mixer_name", t);
|
|
|
|
if ((t = snd_ctl_card_info_get_components(info)) && *t)
|
|
pa_proplist_sets(p, "alsa.components", t);
|
|
|
|
if ((t = snd_ctl_card_info_get_id(info)) && *t)
|
|
pa_proplist_sets(p, "alsa.id", t);
|
|
|
|
snd_ctl_close(ctl);
|
|
}
|
|
|
|
#if 0
|
|
int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) {
|
|
snd_pcm_state_t state;
|
|
snd_pcm_hw_params_t *hwparams;
|
|
int err;
|
|
|
|
pa_assert(pcm);
|
|
|
|
if (revents & POLLERR)
|
|
pa_log_debug("Got POLLERR from ALSA");
|
|
if (revents & POLLNVAL)
|
|
pa_log_warn("Got POLLNVAL from ALSA");
|
|
if (revents & POLLHUP)
|
|
pa_log_warn("Got POLLHUP from ALSA");
|
|
if (revents & POLLPRI)
|
|
pa_log_warn("Got POLLPRI from ALSA");
|
|
if (revents & POLLIN)
|
|
pa_log_debug("Got POLLIN from ALSA");
|
|
if (revents & POLLOUT)
|
|
pa_log_debug("Got POLLOUT from ALSA");
|
|
|
|
state = snd_pcm_state(pcm);
|
|
pa_log_debug("PCM state is %s", snd_pcm_state_name(state));
|
|
|
|
/* Try to recover from this error */
|
|
|
|
switch (state) {
|
|
|
|
case SND_PCM_STATE_DISCONNECTED:
|
|
/* Do not try to recover */
|
|
pa_log_info("Device disconnected.");
|
|
return -1;
|
|
|
|
case SND_PCM_STATE_XRUN:
|
|
if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) {
|
|
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", pa_alsa_strerror(err));
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
case SND_PCM_STATE_SUSPENDED:
|
|
snd_pcm_hw_params_alloca(&hwparams);
|
|
|
|
if ((err = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
|
|
pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(err));
|
|
return -1;
|
|
}
|
|
|
|
if (snd_pcm_hw_params_can_resume(hwparams)) {
|
|
/* Retry resume 3 times before giving up, then fallback to restarting the stream. */
|
|
for (int i = 0; i < 3; i++) {
|
|
if ((err = snd_pcm_resume(pcm)) == 0)
|
|
return 0;
|
|
if (err != -EAGAIN)
|
|
break;
|
|
pa_msleep(25);
|
|
}
|
|
pa_log_warn("Could not recover alsa device from SUSPENDED state, trying to restart PCM");
|
|
}
|
|
/* Fall through */
|
|
|
|
default:
|
|
|
|
snd_pcm_drop(pcm);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) {
|
|
int n, err;
|
|
struct pollfd *pollfd;
|
|
pa_rtpoll_item *item;
|
|
|
|
pa_assert(pcm);
|
|
|
|
if ((n = snd_pcm_poll_descriptors_count(pcm)) < 0) {
|
|
pa_log("snd_pcm_poll_descriptors_count() failed: %s", pa_alsa_strerror(n));
|
|
return NULL;
|
|
}
|
|
|
|
item = pa_rtpoll_item_new(rtpoll, PA_RTPOLL_NEVER, (unsigned) n);
|
|
pollfd = pa_rtpoll_item_get_pollfd(item, NULL);
|
|
|
|
if ((err = snd_pcm_poll_descriptors(pcm, pollfd, (unsigned) n)) < 0) {
|
|
pa_log("snd_pcm_poll_descriptors() failed: %s", pa_alsa_strerror(err));
|
|
pa_rtpoll_item_free(item);
|
|
return NULL;
|
|
}
|
|
|
|
return item;
|
|
}
|
|
|
|
snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) {
|
|
snd_pcm_sframes_t n;
|
|
size_t k;
|
|
|
|
pa_assert(pcm);
|
|
pa_assert(hwbuf_size > 0);
|
|
pa_assert(ss);
|
|
|
|
/* Some ALSA driver expose weird bugs, let's inform the user about
|
|
* what is going on */
|
|
|
|
n = snd_pcm_avail(pcm);
|
|
|
|
if (n <= 0)
|
|
return n;
|
|
|
|
k = (size_t) n * pa_frame_size(ss);
|
|
|
|
if (PA_UNLIKELY(k >= hwbuf_size * 5 ||
|
|
k >= pa_bytes_per_second(ss)*10)) {
|
|
|
|
PA_ONCE_BEGIN {
|
|
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
|
|
pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
"snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
(unsigned long) k),
|
|
(unsigned long) k,
|
|
(unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
|
|
pa_strnull(dn));
|
|
pa_xfree(dn);
|
|
pa_alsa_dump(PA_LOG_DEBUG, pcm);
|
|
} PA_ONCE_END;
|
|
|
|
/* Mhmm, let's try not to fail completely */
|
|
n = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_status_t *status, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss,
|
|
bool capture) {
|
|
ssize_t k;
|
|
size_t abs_k;
|
|
int err;
|
|
snd_pcm_sframes_t avail = 0;
|
|
#if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */
|
|
snd_pcm_audio_tstamp_config_t tstamp_config;
|
|
#endif
|
|
|
|
pa_assert(pcm);
|
|
pa_assert(delay);
|
|
pa_assert(hwbuf_size > 0);
|
|
pa_assert(ss);
|
|
|
|
/* Some ALSA driver expose weird bugs, let's inform the user about
|
|
* what is going on. We're going to get both the avail and delay values so
|
|
* that we can compare and check them for capture.
|
|
* This is done with snd_pcm_status() which provides
|
|
* avail, delay and timestamp values in a single kernel call to improve
|
|
* timer-based scheduling */
|
|
|
|
#if (SND_LIB_VERSION >= ((1<<16)|(1<<8)|0)) /* API additions in 1.1.0 */
|
|
|
|
/* The time stamp configuration needs to be set so that the
|
|
* ALSA code will use the internal delay reported by the driver.
|
|
* The time stamp configuration was introduced in alsa version 1.1.0. */
|
|
tstamp_config.type_requested = 1; /* ALSA default time stamp type */
|
|
tstamp_config.report_delay = 1;
|
|
snd_pcm_status_set_audio_htstamp_config(status, &tstamp_config);
|
|
#endif
|
|
|
|
if ((err = snd_pcm_status(pcm, status)) < 0)
|
|
return err;
|
|
|
|
avail = snd_pcm_status_get_avail(status);
|
|
*delay = snd_pcm_status_get_delay(status);
|
|
|
|
k = (ssize_t) *delay * (ssize_t) pa_frame_size(ss);
|
|
|
|
abs_k = k >= 0 ? (size_t) k : (size_t) -k;
|
|
|
|
if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 ||
|
|
abs_k >= pa_bytes_per_second(ss)*10)) {
|
|
|
|
PA_ONCE_BEGIN {
|
|
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
|
|
pa_log_debug(ngettext("snd_pcm_delay() returned a value that is exceptionally large: %li byte (%s%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
"snd_pcm_delay() returned a value that is exceptionally large: %li bytes (%s%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
(signed long) k),
|
|
(signed long) k,
|
|
k < 0 ? "-" : "",
|
|
(unsigned long) (pa_bytes_to_usec(abs_k, ss) / PA_USEC_PER_MSEC),
|
|
pa_strnull(dn));
|
|
pa_xfree(dn);
|
|
pa_alsa_dump(PA_LOG_DEBUG, pcm);
|
|
} PA_ONCE_END;
|
|
|
|
/* Mhmm, let's try not to fail completely */
|
|
if (k < 0)
|
|
*delay = -(snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
|
|
else
|
|
*delay = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
|
|
}
|
|
|
|
if (capture) {
|
|
abs_k = (size_t) avail * pa_frame_size(ss);
|
|
|
|
if (PA_UNLIKELY(abs_k >= hwbuf_size * 5 ||
|
|
abs_k >= pa_bytes_per_second(ss)*10)) {
|
|
|
|
PA_ONCE_BEGIN {
|
|
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
|
|
pa_log_debug(ngettext("snd_pcm_avail() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
"snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
(unsigned long) k),
|
|
(unsigned long) k,
|
|
(unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
|
|
pa_strnull(dn));
|
|
pa_xfree(dn);
|
|
pa_alsa_dump(PA_LOG_DEBUG, pcm);
|
|
} PA_ONCE_END;
|
|
|
|
/* Mhmm, let's try not to fail completely */
|
|
avail = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
|
|
}
|
|
|
|
if (PA_UNLIKELY(*delay < avail)) {
|
|
PA_ONCE_BEGIN {
|
|
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
|
|
pa_log(_("snd_pcm_avail_delay() returned strange values: delay %lu is less than avail %lu.\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."),
|
|
(unsigned long) *delay,
|
|
(unsigned long) avail,
|
|
pa_strnull(dn));
|
|
pa_xfree(dn);
|
|
pa_alsa_dump(PA_LOG_ERROR, pcm);
|
|
} PA_ONCE_END;
|
|
|
|
/* try to fixup */
|
|
*delay = avail;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) {
|
|
int r;
|
|
snd_pcm_uframes_t before;
|
|
size_t k;
|
|
|
|
pa_assert(pcm);
|
|
pa_assert(areas);
|
|
pa_assert(offset);
|
|
pa_assert(frames);
|
|
pa_assert(hwbuf_size > 0);
|
|
pa_assert(ss);
|
|
|
|
before = *frames;
|
|
|
|
r = snd_pcm_mmap_begin(pcm, areas, offset, frames);
|
|
|
|
if (r < 0)
|
|
return r;
|
|
|
|
k = (size_t) *frames * pa_frame_size(ss);
|
|
|
|
if (PA_UNLIKELY(*frames > before ||
|
|
k >= hwbuf_size * 3 ||
|
|
k >= pa_bytes_per_second(ss)*10))
|
|
PA_ONCE_BEGIN {
|
|
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
|
|
pa_log_debug(ngettext("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu byte (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
"snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
|
|
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.",
|
|
(unsigned long) k),
|
|
(unsigned long) k,
|
|
(unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
|
|
pa_strnull(dn));
|
|
pa_xfree(dn);
|
|
pa_alsa_dump(PA_LOG_DEBUG, pcm);
|
|
} PA_ONCE_END;
|
|
|
|
return r;
|
|
}
|
|
#endif
|
|
|
|
char *pa_alsa_get_driver_name(int card) {
|
|
char *t, *m, *n;
|
|
|
|
pa_assert(card >= 0);
|
|
|
|
t = pa_sprintf_malloc("/sys/class/sound/card%i/device/driver/module", card);
|
|
m = pa_readlink(t);
|
|
pa_xfree(t);
|
|
|
|
if (!m)
|
|
return NULL;
|
|
|
|
n = pa_xstrdup(pa_path_get_filename(m));
|
|
pa_xfree(m);
|
|
|
|
return n;
|
|
}
|
|
|
|
char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm) {
|
|
int card;
|
|
snd_pcm_info_t* info;
|
|
snd_pcm_info_alloca(&info);
|
|
|
|
pa_assert(pcm);
|
|
|
|
if (snd_pcm_info(pcm, info) < 0)
|
|
return NULL;
|
|
|
|
if ((card = snd_pcm_info_get_card(info)) < 0)
|
|
return NULL;
|
|
|
|
return pa_alsa_get_driver_name(card);
|
|
}
|
|
|
|
#if 0
|
|
char *pa_alsa_get_reserve_name(const char *device) {
|
|
const char *t;
|
|
int i;
|
|
|
|
pa_assert(device);
|
|
|
|
if ((t = strchr(device, ':')))
|
|
device = t+1;
|
|
|
|
if ((i = snd_card_get_index(device)) < 0) {
|
|
int32_t k;
|
|
|
|
if (pa_atoi(device, &k) < 0)
|
|
return NULL;
|
|
|
|
i = (int) k;
|
|
}
|
|
|
|
return pa_sprintf_malloc("Audio%i", i);
|
|
}
|
|
#endif
|
|
|
|
static void dump_supported_rates(unsigned int* values)
|
|
{
|
|
pa_strbuf *buf;
|
|
char *str;
|
|
int i;
|
|
|
|
buf = pa_strbuf_new();
|
|
|
|
for (i = 0; values[i]; i++) {
|
|
pa_strbuf_printf(buf, " %u", values[i]);
|
|
}
|
|
|
|
str = pa_strbuf_to_string_free(buf);
|
|
pa_log_debug("Supported rates:%s", str);
|
|
pa_xfree(str);
|
|
}
|
|
|
|
unsigned int *pa_alsa_get_supported_rates(snd_pcm_t *pcm, unsigned int fallback_rate) {
|
|
static unsigned int all_rates[] = { 8000, 11025, 12000,
|
|
16000, 22050, 24000,
|
|
32000, 44100, 48000,
|
|
64000, 88200, 96000,
|
|
128000, 176400, 192000,
|
|
352800, 384000,
|
|
705600, 768000 };
|
|
bool supported[PA_ELEMENTSOF(all_rates)] = { false, };
|
|
snd_pcm_hw_params_t *hwparams;
|
|
unsigned int i, j, n, *rates = NULL;
|
|
int ret;
|
|
|
|
snd_pcm_hw_params_alloca(&hwparams);
|
|
|
|
if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
|
|
pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0, n = 0; i < PA_ELEMENTSOF(all_rates); i++) {
|
|
if (snd_pcm_hw_params_test_rate(pcm, hwparams, all_rates[i], 0) == 0) {
|
|
supported[i] = true;
|
|
n++;
|
|
}
|
|
}
|
|
|
|
if (n > 0) {
|
|
rates = pa_xnew(unsigned int, n + 1);
|
|
|
|
for (i = 0, j = 0; i < PA_ELEMENTSOF(all_rates); i++) {
|
|
if (supported[i])
|
|
rates[j++] = all_rates[i];
|
|
}
|
|
|
|
rates[j] = 0;
|
|
} else {
|
|
rates = pa_xnew(unsigned int, 2);
|
|
|
|
rates[0] = fallback_rate;
|
|
if ((ret = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rates[0], NULL)) < 0) {
|
|
pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret));
|
|
pa_xfree(rates);
|
|
return NULL;
|
|
}
|
|
|
|
rates[1] = 0;
|
|
}
|
|
|
|
dump_supported_rates(rates);
|
|
return rates;
|
|
}
|
|
|
|
pa_sample_format_t *pa_alsa_get_supported_formats(snd_pcm_t *pcm, pa_sample_format_t fallback_format) {
|
|
static const snd_pcm_format_t format_trans_to_pcm[] = {
|
|
[PA_SAMPLE_U8] = SND_PCM_FORMAT_U8,
|
|
[PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
|
|
[PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
|
|
[PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
|
|
[PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
|
|
[PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
|
|
[PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
|
|
[PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
|
|
[PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
|
|
[PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
|
|
[PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
|
|
[PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
|
|
[PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE,
|
|
};
|
|
static const pa_sample_format_t all_formats[] = {
|
|
PA_SAMPLE_U8,
|
|
PA_SAMPLE_ALAW,
|
|
PA_SAMPLE_ULAW,
|
|
PA_SAMPLE_S16LE,
|
|
PA_SAMPLE_S16BE,
|
|
PA_SAMPLE_FLOAT32LE,
|
|
PA_SAMPLE_FLOAT32BE,
|
|
PA_SAMPLE_S32LE,
|
|
PA_SAMPLE_S32BE,
|
|
PA_SAMPLE_S24LE,
|
|
PA_SAMPLE_S24BE,
|
|
PA_SAMPLE_S24_32LE,
|
|
PA_SAMPLE_S24_32BE,
|
|
};
|
|
bool supported[PA_ELEMENTSOF(all_formats)] = {
|
|
false,
|
|
};
|
|
snd_pcm_hw_params_t *hwparams;
|
|
unsigned int i, j, n;
|
|
pa_sample_format_t *formats = NULL;
|
|
int ret;
|
|
|
|
snd_pcm_hw_params_alloca(&hwparams);
|
|
|
|
if ((ret = snd_pcm_hw_params_any(pcm, hwparams)) < 0) {
|
|
pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0, n = 0; i < PA_ELEMENTSOF(all_formats); i++) {
|
|
if (snd_pcm_hw_params_test_format(pcm, hwparams, format_trans_to_pcm[all_formats[i]]) == 0) {
|
|
supported[i] = true;
|
|
n++;
|
|
}
|
|
}
|
|
|
|
if (n > 0) {
|
|
formats = pa_xnew(pa_sample_format_t, n + 1);
|
|
|
|
for (i = 0, j = 0; i < PA_ELEMENTSOF(all_formats); i++) {
|
|
if (supported[i])
|
|
formats[j++] = all_formats[i];
|
|
}
|
|
|
|
formats[j] = PA_SAMPLE_MAX;
|
|
} else {
|
|
formats = pa_xnew(pa_sample_format_t, 2);
|
|
|
|
formats[0] = fallback_format;
|
|
if ((ret = snd_pcm_hw_params_set_format(pcm, hwparams, format_trans_to_pcm[formats[0]])) < 0) {
|
|
pa_log_debug("snd_pcm_hw_params_set_format() failed: %s", pa_alsa_strerror(ret));
|
|
pa_xfree(formats);
|
|
return NULL;
|
|
}
|
|
|
|
formats[1] = PA_SAMPLE_MAX;
|
|
}
|
|
|
|
return formats;
|
|
}
|
|
|
|
bool pa_alsa_pcm_is_hw(snd_pcm_t *pcm) {
|
|
snd_pcm_info_t* info;
|
|
snd_pcm_info_alloca(&info);
|
|
|
|
pa_assert(pcm);
|
|
|
|
if (snd_pcm_info(pcm, info) < 0)
|
|
return false;
|
|
|
|
return snd_pcm_info_get_card(info) >= 0;
|
|
}
|
|
|
|
bool pa_alsa_pcm_is_modem(snd_pcm_t *pcm) {
|
|
snd_pcm_info_t* info;
|
|
snd_pcm_info_alloca(&info);
|
|
|
|
pa_assert(pcm);
|
|
|
|
if (snd_pcm_info(pcm, info) < 0)
|
|
return false;
|
|
|
|
return snd_pcm_info_get_class(info) == SND_PCM_CLASS_MODEM;
|
|
}
|
|
|
|
const char* pa_alsa_strerror(int errnum) {
|
|
return snd_strerror(errnum);
|
|
}
|
|
|
|
#if 0
|
|
bool pa_alsa_may_tsched(bool want) {
|
|
|
|
if (!want)
|
|
return false;
|
|
|
|
if (!pa_rtclock_hrtimer()) {
|
|
/* We cannot depend on being woken up in time when the timers
|
|
are inaccurate, so let's fallback to classic IO based playback
|
|
then. */
|
|
pa_log_notice("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
|
|
return false; }
|
|
|
|
if (pa_running_in_vm()) {
|
|
/* We cannot depend on being woken up when we ask for in a VM,
|
|
* so let's fallback to classic IO based playback then. */
|
|
pa_log_notice("Disabling timer-based scheduling because running inside a VM.");
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
#endif
|
|
|
|
#define SND_MIXER_ELEM_PULSEAUDIO (SND_MIXER_ELEM_LAST + 10)
|
|
|
|
static snd_mixer_elem_t *pa_alsa_mixer_find(snd_mixer_t *mixer,
|
|
snd_ctl_elem_iface_t iface,
|
|
const char *name,
|
|
unsigned int index,
|
|
unsigned int device,
|
|
unsigned int subdevice) {
|
|
snd_mixer_elem_t *elem;
|
|
|
|
for (elem = snd_mixer_first_elem(mixer); elem; elem = snd_mixer_elem_next(elem)) {
|
|
snd_hctl_elem_t **_helem, *helem;
|
|
if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_PULSEAUDIO)
|
|
continue;
|
|
_helem = snd_mixer_elem_get_private(elem);
|
|
helem = *_helem;
|
|
if (snd_hctl_elem_get_interface(helem) != iface)
|
|
continue;
|
|
if (!pa_streq(snd_hctl_elem_get_name(helem), name))
|
|
continue;
|
|
if (snd_hctl_elem_get_index(helem) != index)
|
|
continue;
|
|
if (snd_hctl_elem_get_device(helem) != device)
|
|
continue;
|
|
if (snd_hctl_elem_get_subdevice(helem) != subdevice)
|
|
continue;
|
|
return elem;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
snd_mixer_elem_t *pa_alsa_mixer_find_card(snd_mixer_t *mixer, struct pa_alsa_mixer_id *alsa_id, unsigned int device) {
|
|
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_CARD, alsa_id->name, alsa_id->index, device, 0);
|
|
}
|
|
|
|
snd_mixer_elem_t *pa_alsa_mixer_find_pcm(snd_mixer_t *mixer, const char *name, unsigned int device) {
|
|
return pa_alsa_mixer_find(mixer, SND_CTL_ELEM_IFACE_PCM, name, 0, device, 0);
|
|
}
|
|
|
|
static int mixer_class_compare(const snd_mixer_elem_t *c1, const snd_mixer_elem_t *c2)
|
|
{
|
|
/* Dummy compare function */
|
|
return c1 == c2 ? 0 : (c1 > c2 ? 1 : -1);
|
|
}
|
|
|
|
static void mixer_melem_free(snd_mixer_elem_t *elem)
|
|
{
|
|
snd_hctl_elem_t **_helem;
|
|
_helem = snd_mixer_elem_get_private(elem);
|
|
pa_xfree(_helem);
|
|
}
|
|
|
|
static int mixer_class_event(snd_mixer_class_t *class, unsigned int mask,
|
|
snd_hctl_elem_t *helem, snd_mixer_elem_t *melem)
|
|
{
|
|
int err;
|
|
const char *name = snd_hctl_elem_get_name(helem);
|
|
snd_hctl_elem_t **_helem;
|
|
// NOTE: The remove event defined as '~0U`.
|
|
if (mask == SND_CTL_EVENT_MASK_REMOVE) {
|
|
// NOTE: unless remove pointer to melem from link-list at private_data of helem, hits
|
|
// assertion in alsa-lib since the list is not empty.
|
|
_helem = snd_mixer_elem_get_private(melem);
|
|
*_helem = NULL;
|
|
snd_mixer_elem_detach(melem, helem);
|
|
} else if (mask & SND_CTL_EVENT_MASK_ADD) {
|
|
snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem);
|
|
if (iface == SND_CTL_ELEM_IFACE_CARD || iface == SND_CTL_ELEM_IFACE_PCM) {
|
|
snd_mixer_t *mixer = snd_mixer_class_get_mixer(class);
|
|
snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem);
|
|
const char *name = snd_hctl_elem_get_name(helem);
|
|
const int index = snd_hctl_elem_get_index(helem);
|
|
const int device = snd_hctl_elem_get_device(helem);
|
|
const int subdevice = snd_hctl_elem_get_subdevice(helem);
|
|
snd_mixer_elem_t *new_melem;
|
|
|
|
bool found = true;
|
|
|
|
new_melem = pa_alsa_mixer_find(mixer, iface, name, index, device, subdevice);
|
|
if (!new_melem) {
|
|
_helem = pa_xmalloc(sizeof(snd_hctl_elem_t *));
|
|
*_helem = helem;
|
|
/* Put the hctl pointer as our private data - it will be useful for callbacks */
|
|
if ((err = snd_mixer_elem_new(&new_melem, SND_MIXER_ELEM_PULSEAUDIO, 0, _helem, mixer_melem_free)) < 0) {
|
|
pa_log_warn("snd_mixer_elem_new failed: %s", pa_alsa_strerror(err));
|
|
return 0;
|
|
}
|
|
found = false;
|
|
} else {
|
|
_helem = snd_mixer_elem_get_private(new_melem);
|
|
if (_helem) {
|
|
char *s1, *s2;
|
|
snd_ctl_elem_id_t *id1, *id2;
|
|
snd_ctl_elem_id_alloca(&id1);
|
|
snd_ctl_elem_id_alloca(&id2);
|
|
snd_hctl_elem_get_id(helem, id1);
|
|
snd_hctl_elem_get_id(*_helem, id2);
|
|
s1 = snd_ctl_ascii_elem_id_get(id1);
|
|
s2 = snd_ctl_ascii_elem_id_get(id2);
|
|
pa_log_warn("mixer_class_event - duplicate mixer controls: %s | %s", s1, s2);
|
|
free(s2);
|
|
free(s1);
|
|
return 0;
|
|
}
|
|
*_helem = helem;
|
|
}
|
|
|
|
if ((err = snd_mixer_elem_attach(new_melem, helem)) < 0) {
|
|
pa_log_warn("snd_mixer_elem_attach failed: %s", pa_alsa_strerror(err));
|
|
snd_mixer_elem_free(melem);
|
|
return 0;
|
|
}
|
|
|
|
if (!found) {
|
|
if ((err = snd_mixer_elem_add(new_melem, class)) < 0) {
|
|
pa_log_warn("snd_mixer_elem_add failed: %s", pa_alsa_strerror(err));
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (mask & SND_CTL_EVENT_MASK_VALUE) {
|
|
snd_mixer_elem_value(melem); /* Calls the element callback */
|
|
return 0;
|
|
}
|
|
else
|
|
pa_log_info("Got an unknown mixer class event for %s: mask 0x%x", name, mask);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int prepare_mixer(snd_mixer_t *mixer, const char *dev, snd_hctl_t *hctl) {
|
|
int err;
|
|
snd_mixer_class_t *class;
|
|
|
|
pa_assert(mixer);
|
|
pa_assert(dev);
|
|
|
|
if ((err = snd_mixer_attach_hctl(mixer, hctl)) < 0) {
|
|
pa_log_info("Unable to attach to mixer %s: %s", dev, pa_alsa_strerror(err));
|
|
return -1;
|
|
}
|
|
|
|
if (snd_mixer_class_malloc(&class)) {
|
|
pa_log_info("Failed to allocate mixer class for %s", dev);
|
|
return -1;
|
|
}
|
|
snd_mixer_class_set_event(class, mixer_class_event);
|
|
snd_mixer_class_set_compare(class, mixer_class_compare);
|
|
if ((err = snd_mixer_class_register(class, mixer)) < 0) {
|
|
pa_log_info("Unable register mixer class for %s: %s", dev, pa_alsa_strerror(err));
|
|
snd_mixer_class_free(class);
|
|
return -1;
|
|
}
|
|
/* From here on, the mixer class is deallocated by alsa on snd_mixer_close/free. */
|
|
|
|
if ((err = snd_mixer_selem_register(mixer, NULL, NULL)) < 0) {
|
|
pa_log_warn("Unable to register mixer: %s", pa_alsa_strerror(err));
|
|
return -1;
|
|
}
|
|
|
|
if ((err = snd_mixer_load(mixer)) < 0) {
|
|
pa_log_warn("Unable to load mixer: %s", pa_alsa_strerror(err));
|
|
return -1;
|
|
}
|
|
|
|
pa_log_info("Successfully attached to mixer '%s'", dev);
|
|
return 0;
|
|
}
|
|
|
|
snd_mixer_t *pa_alsa_open_mixer(pa_hashmap *mixers, int alsa_card_index, bool probe) {
|
|
char *md = pa_sprintf_malloc("hw:%i", alsa_card_index);
|
|
snd_mixer_t *m = pa_alsa_open_mixer_by_name(mixers, md, probe);
|
|
pa_xfree(md);
|
|
return m;
|
|
}
|
|
|
|
pa_alsa_mixer *pa_alsa_create_mixer(pa_hashmap *mixers, const char *dev, snd_mixer_t *m, bool probe) {
|
|
pa_alsa_mixer *pm;
|
|
|
|
pm = pa_xnew0(pa_alsa_mixer, 1);
|
|
if (pm == NULL)
|
|
return NULL;
|
|
|
|
pm->used_for_probe_only = probe;
|
|
pm->mixer_handle = m;
|
|
pa_hashmap_put(mixers, pa_xstrdup(dev), pm);
|
|
return pm;
|
|
}
|
|
|
|
snd_mixer_t *pa_alsa_open_mixer_by_name(pa_hashmap *mixers, const char *dev, bool probe) {
|
|
int err;
|
|
snd_mixer_t *m;
|
|
snd_hctl_t *hctl;
|
|
pa_alsa_mixer *pm;
|
|
|
|
pa_assert(mixers);
|
|
pa_assert(dev);
|
|
|
|
pm = pa_hashmap_get(mixers, dev);
|
|
if (pm) {
|
|
if (!probe)
|
|
pm->used_for_probe_only = false;
|
|
return pm->mixer_handle;
|
|
}
|
|
|
|
if ((err = snd_mixer_open(&m, 0)) < 0) {
|
|
pa_log("Error opening mixer: %s", pa_alsa_strerror(err));
|
|
return NULL;
|
|
}
|
|
|
|
err = snd_hctl_open(&hctl, dev, 0);
|
|
if (err < 0) {
|
|
pa_log("Error opening hctl device: %s", pa_alsa_strerror(err));
|
|
goto __close;
|
|
}
|
|
|
|
if (prepare_mixer(m, dev, hctl) >= 0) {
|
|
/* get the ALSA card number (index) and ID (alias) and create two identical mixers */
|
|
char *p, *dev2, *dev_idx, *dev_id;
|
|
snd_ctl_card_info_t *info;
|
|
snd_ctl_card_info_alloca(&info);
|
|
err = snd_ctl_card_info(snd_hctl_ctl(hctl), info);
|
|
if (err < 0)
|
|
goto __std;
|
|
dev2 = pa_xstrdup(dev);
|
|
if (dev2 == NULL)
|
|
goto __close;
|
|
p = strchr(dev2, ':');
|
|
/* sanity check - only hw: devices */
|
|
if (p == NULL || (p - dev2) < 2 || !pa_strneq(p - 2, "hw:", 3)) {
|
|
pa_xfree(dev2);
|
|
goto __std;
|
|
}
|
|
*p = '\0';
|
|
dev_idx = pa_sprintf_malloc("%s:%u", dev2, snd_ctl_card_info_get_card(info));
|
|
dev_id = pa_sprintf_malloc("%s:%s", dev2, snd_ctl_card_info_get_id(info));
|
|
pa_log_debug("ALSA alias mixers: %s = %s", dev_idx, dev_id);
|
|
if (dev_idx && dev_id && (strcmp(dev, dev_idx) == 0 || strcmp(dev, dev_id) == 0)) {
|
|
pm = pa_alsa_create_mixer(mixers, dev_idx, m, probe);
|
|
if (pm) {
|
|
pa_alsa_mixer *pm2;
|
|
pm2 = pa_alsa_create_mixer(mixers, dev_id, m, probe);
|
|
if (pm2) {
|
|
pm->alias = pm2;
|
|
pm2->alias = pm;
|
|
}
|
|
}
|
|
}
|
|
pa_xfree(dev_id);
|
|
pa_xfree(dev_idx);
|
|
pa_xfree(dev2);
|
|
__std:
|
|
if (pm == NULL)
|
|
pm = pa_alsa_create_mixer(mixers, dev, m, probe);
|
|
if (pm)
|
|
return m;
|
|
}
|
|
|
|
__close:
|
|
snd_mixer_close(m);
|
|
return NULL;
|
|
}
|
|
|
|
snd_mixer_t *pa_alsa_open_mixer_for_pcm(pa_hashmap *mixers, snd_pcm_t *pcm, bool probe) {
|
|
snd_pcm_info_t* info;
|
|
snd_pcm_info_alloca(&info);
|
|
|
|
pa_assert(pcm);
|
|
|
|
if (snd_pcm_info(pcm, info) >= 0) {
|
|
int card_idx;
|
|
|
|
if ((card_idx = snd_pcm_info_get_card(info)) >= 0)
|
|
return pa_alsa_open_mixer(mixers, card_idx, probe);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#if 0
|
|
void pa_alsa_mixer_set_fdlist(pa_hashmap *mixers, snd_mixer_t *mixer_handle, pa_mainloop_api *ml)
|
|
{
|
|
pa_alsa_mixer *pm;
|
|
void *state;
|
|
|
|
PA_HASHMAP_FOREACH(pm, mixers, state)
|
|
if (pm->mixer_handle == mixer_handle) {
|
|
pm->used_for_probe_only = false;
|
|
if (!pm->fdl) {
|
|
pm->fdl = pa_alsa_fdlist_new();
|
|
if (pm->fdl)
|
|
pa_alsa_fdlist_set_handle(pm->fdl, pm->mixer_handle, NULL, ml);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void pa_alsa_mixer_free(pa_alsa_mixer *mixer)
|
|
{
|
|
if (mixer->mixer_handle && mixer->alias == NULL)
|
|
snd_mixer_close(mixer->mixer_handle);
|
|
if (mixer->alias)
|
|
mixer->alias->alias = NULL;
|
|
pa_xfree(mixer);
|
|
}
|
|
|
|
int pa_alsa_get_hdmi_eld(snd_hctl_elem_t *elem, pa_hdmi_eld *eld) {
|
|
|
|
/* The ELD format is specific to HDA Intel sound cards and defined in the
|
|
HDA specification: http://www.intel.com/content/www/us/en/standards/high-definition-audio-specification.html */
|
|
int err;
|
|
snd_ctl_elem_info_t *info;
|
|
snd_ctl_elem_value_t *value;
|
|
uint8_t *elddata;
|
|
unsigned int eldsize, mnl, sad_count;
|
|
unsigned int device;
|
|
|
|
pa_assert(eld != NULL);
|
|
pa_assert(elem != NULL);
|
|
|
|
/* Does it have any contents? */
|
|
snd_ctl_elem_info_alloca(&info);
|
|
snd_ctl_elem_value_alloca(&value);
|
|
if ((err = snd_hctl_elem_info(elem, info)) < 0 ||
|
|
(err = snd_hctl_elem_read(elem, value)) < 0) {
|
|
pa_log_warn("Accessing ELD control failed with error %s", snd_strerror(err));
|
|
return -1;
|
|
}
|
|
|
|
device = snd_hctl_elem_get_device(elem);
|
|
eldsize = snd_ctl_elem_info_get_count(info);
|
|
elddata = (unsigned char *) snd_ctl_elem_value_get_bytes(value);
|
|
if (elddata == NULL || eldsize == 0) {
|
|
pa_log_debug("ELD info empty (for device=%d)", device);
|
|
return -1;
|
|
}
|
|
if (eldsize < 20 || eldsize > 256) {
|
|
pa_log_debug("ELD info has wrong size (for device=%d)", device);
|
|
return -1;
|
|
}
|
|
|
|
/* Try to fetch monitor name */
|
|
mnl = elddata[4] & 0x1f;
|
|
if (mnl == 0 || mnl > 16 || 20 + mnl > eldsize) {
|
|
pa_log_debug("No monitor name in ELD info (for device=%d)", device);
|
|
mnl = 0;
|
|
}
|
|
memcpy(eld->monitor_name, &elddata[20], mnl);
|
|
eld->monitor_name[mnl] = '\0';
|
|
if (mnl)
|
|
pa_log_debug("Monitor name in ELD info is '%s' (for device=%d)", eld->monitor_name, device);
|
|
|
|
/* Fetch Short Audio Descriptors */
|
|
sad_count = (elddata[5] & 0xf0) >> 4;
|
|
pa_log_debug("SAD count in ELD info is %u (for device=%d)", sad_count, device);
|
|
if (20 + mnl + 3 * sad_count > eldsize) {
|
|
pa_log_debug("Invalid SAD count (%u) in ELD info (for device=%d)", sad_count, device);
|
|
sad_count = 0;
|
|
}
|
|
|
|
eld->iec958_codecs = 0;
|
|
for (unsigned i = 0; i < sad_count; i++) {
|
|
uint8_t *sad = &elddata[20 + mnl + 3 * i];
|
|
|
|
/* https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#Audio_Data_Blocks */
|
|
switch ((sad[0] & 0x78) >> 3) {
|
|
case 1:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_PCM;
|
|
break;
|
|
case 2:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_AC3;
|
|
break;
|
|
case 3:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_MPEG;
|
|
break;
|
|
case 4:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_MPEG;
|
|
break;
|
|
case 5:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_MPEG;
|
|
break;
|
|
case 6:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_MPEG2_AAC;
|
|
break;
|
|
case 7:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_DTS;
|
|
break;
|
|
case 10:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_EAC3;
|
|
break;
|
|
case 11:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_DTSHD;
|
|
break;
|
|
case 12:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_TRUEHD;
|
|
break;
|
|
default:
|
|
eld->iec958_codecs |= 1ULL << SPA_AUDIO_IEC958_CODEC_UNKNOWN;
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|