Adding upstream version 0.3.65.upstream/0.3.65upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1143 insertions, 0 deletions

diff --git a/spa/plugins/alsa/alsa-compress-offload-sink.c b/spa/plugins/alsa/alsa-compress-offload-sink.c
new file mode 100644
index 0000000..966e680
--- /dev/null
+++ b/spa/plugins/alsa/alsa-compress-offload-sink.c
@@ -0,0 +1,1143 @@
+/* Spa ALSA Compress-Offload sink
+ *
+ * Copyright © 2022 Wim Taymans
+ *           © 2022 Asymptotic Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <spa/monitor/device.h>
+#include <spa/support/plugin.h>
+#include <spa/support/log.h>
+#include <spa/support/system.h>
+#include <spa/support/loop.h>
+#include <spa/utils/list.h>
+#include <spa/utils/keys.h>
+#include <spa/utils/json.h>
+#include <spa/utils/names.h>
+#include <spa/utils/string.h>
+#include <spa/utils/result.h>
+#include <spa/node/node.h>
+#include <spa/node/utils.h>
+#include <spa/node/io.h>
+#include <spa/node/keys.h>
+#include <spa/param/audio/format-utils.h>
+#include <spa/debug/types.h>
+#include <spa/debug/mem.h>
+#include <spa/param/audio/type-info.h>
+#include <spa/param/param.h>
+#include <spa/pod/filter.h>
+#include <spa/control/control.h>
+
+#include <sound/compress_params.h>
+#include <tinycompress/tinycompress.h>
+
+/*
+ * This creates a PipeWire sink node which uses the tinycompress user space
+ * library to use the ALSA Compress-Offload API for writing compressed data
+ * like MP3, FLAC etc. to an DSP that can handle such data directly.
+ *
+ * These show up under /dev/snd like comprCxDx, as opposed to regular
+ * ALSA PCM devices.
+ *
+ * root@dragonboard-845c:~# ls /dev/snd
+ * by-path  comprC0D3  controlC0  pcmC0D0c  pcmC0D0p  pcmC0D1c  pcmC0D1p  pcmC0D2c  pcmC0D2p  timer
+ *
+ * ## Example configuration
+ *\code{.unparsed}
+ * context.objects = [
+ *  {   factory = spa-node-factory
+ *      args = {
+ *          factory.name   = api.alsa.compress.offload.sink
+ *          node.name      = Compress-Offload-Sink
+ *          media.class    = "Audio/Sink"
+ *          api.alsa.path  = "hw:0,3"
+ *      }
+ *  }
+ *]
+ *\endcode
+ *
+ * TODO:
+ * - Clocking
+ * - Implement pause and resume
+ * - Having a better wait mechanism
+ * - Automatic loading using alsa-udev
+ *
+ */
+
+#define NAME                "compress-offload-audio-sink"
+#define DEFAULT_CHANNELS    2
+#define DEFAULT_RATE        44100
+#define MAX_BUFFERS         4
+#define MAX_PORTS           1
+#define MAX_CODECS          32 /* See include/sound/compress_params.h */
+
+#define MIN_FRAGMENT_SIZE   (4 * 1024)
+#define MAX_FRAGMENT_SIZE   (64 * 1024)
+#define MIN_NUM_FRAGMENTS   (4)
+#define MAX_NUM_FRAGMENTS   (8 * 4)
+
+struct props {
+	uint32_t channels;
+	uint32_t rate;
+	uint32_t pos[SPA_AUDIO_MAX_CHANNELS];
+	char device[64];
+};
+
+static void reset_props(struct props *props)
+{
+	props->channels = 0;
+	props->rate = 0;
+}
+
+struct buffer {
+	uint32_t id;
+	uint32_t flags;
+	struct spa_buffer *outbuf;
+};
+
+struct impl;
+
+struct port {
+	uint64_t info_all;
+	struct spa_port_info info;
+	struct spa_param_info params[5];
+
+	struct spa_io_buffers *io;
+
+	bool have_format;
+	struct spa_audio_info current_format;
+
+	struct buffer buffers[MAX_BUFFERS];
+	uint32_t n_buffers;
+	uint32_t written;
+};
+
+struct impl {
+	struct spa_handle handle;
+	struct spa_node node;
+	struct spa_log *log;
+	struct props props;
+
+	struct spa_node_info info;
+	struct spa_param_info params[1];
+
+	struct spa_hook_list hooks;
+	struct spa_callbacks callbacks;
+	struct port port;
+
+	unsigned int started_node:1;
+	unsigned int started_compress:1;
+	uint64_t info_all;
+	uint32_t quantum_limit;
+
+	struct compr_config compr_conf;
+	struct snd_codec codec;
+	struct compress *compress;
+
+	int32_t codecs_supported[MAX_CODECS];
+	uint32_t num_codecs;
+};
+
+#define CHECK_PORT(this,d,p)  ((d) == SPA_DIRECTION_INPUT && (p) < MAX_PORTS)
+
+static const struct spa_dict_item node_info_items[] = {
+	{ SPA_KEY_DEVICE_API, "alsa" },
+	{ SPA_KEY_MEDIA_CLASS, "Audio/Sink" },
+	{ SPA_KEY_NODE_DRIVER, "false" },
+	{ SPA_KEY_NODE_PAUSE_ON_IDLE, "false" },
+};
+
+static const struct codec_id {
+	uint32_t codec_id;
+} codec_info[] = {
+	{ SND_AUDIOCODEC_MP3, },
+	{ SND_AUDIOCODEC_AAC, },
+	{ SND_AUDIOCODEC_WMA, },
+	{ SND_AUDIOCODEC_VORBIS, },
+	{ SND_AUDIOCODEC_FLAC, },
+	{ SND_AUDIOCODEC_ALAC, },
+	{ SND_AUDIOCODEC_APE, },
+	{ SND_AUDIOCODEC_REAL, },
+	{ SND_AUDIOCODEC_AMR, },
+	{ SND_AUDIOCODEC_AMRWB, },
+};
+
+static int
+open_compress(struct impl *this)
+{
+	struct compress *compress;
+
+	compress = compress_open_by_name(this->props.device, COMPRESS_IN, &this->compr_conf);
+	if (!compress || !is_compress_ready(compress)) {
+		spa_log_error(this->log, NAME " %p: Unable to open compress device", this);
+		return -EINVAL;
+	}
+
+	this->compress = compress;
+
+	compress_nonblock(this->compress, 1);
+
+	return 0;
+}
+
+static int
+write_compress(struct impl *this, void *buf, int32_t size)
+{
+	int32_t wrote;
+	int32_t to_write = size;
+	struct port *port = &this->port;
+
+retry:
+	wrote = compress_write(this->compress, buf, to_write);
+	if (wrote < 0) {
+		spa_log_error(this->log, NAME " %p: Error playing sample: %s",
+				this, compress_get_error(this->compress));
+		return wrote;
+	}
+	port->written += wrote;
+
+	spa_log_debug(this->log, NAME " %p: We wrote %d, DSP accepted %d\n", this, size, wrote);
+
+	if (wrote < to_write) {
+		/*
+		 * The choice of 20ms as the time to wait is
+		 * completely arbitrary.
+		 */
+		compress_wait(this->compress, 20);
+		buf = (uint8_t *)buf + wrote;
+		to_write = to_write - wrote;
+		goto retry;
+	}
+
+	/*
+	 * One write has to happen before starting the compressed node. Calling
+	 * compress_start before writing MIN_NUM_FRAGMENTS * MIN_FRAGMENT_SIZE
+	 * will result in a distorted audio playback.
+	 */
+	if (!this->started_compress &&
+			(port->written >= (MIN_FRAGMENT_SIZE * MIN_NUM_FRAGMENTS))) {
+		compress_start(this->compress);
+		this->started_compress = true;
+	}
+
+	return size;
+}
+
+static void emit_node_info(struct impl *this, bool full)
+{
+	uint64_t old = full ? this->info.change_mask : 0;
+	if (full)
+		this->info.change_mask = this->info_all;
+	if (this->info.change_mask) {
+		this->info.props = &SPA_DICT_INIT_ARRAY(node_info_items);
+		spa_node_emit_info(&this->hooks, &this->info);
+		this->info.change_mask = old;
+	}
+}
+
+static void emit_port_info(struct impl *this, struct port *port, bool full)
+{
+	uint64_t old = full ? port->info.change_mask : 0;
+	if (full)
+		port->info.change_mask = port->info_all;
+	if (port->info.change_mask) {
+		spa_node_emit_port_info(&this->hooks,
+				SPA_DIRECTION_INPUT, 0, &port->info);
+		port->info.change_mask = old;
+	}
+}
+
+static int impl_node_enum_params(void *object, int seq,
+			uint32_t id, uint32_t start, uint32_t num,
+			const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct spa_pod *param;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[4096];
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumPortConfig:
+	case SPA_PARAM_PortConfig:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamPortConfig, id,
+				SPA_PARAM_PORT_CONFIG_direction, SPA_POD_Id(SPA_DIRECTION_INPUT),
+				SPA_PARAM_PORT_CONFIG_mode,      SPA_POD_Id(SPA_PARAM_PORT_CONFIG_MODE_passthrough));
+			break;
+		default:
+			return 0;
+		}
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int
+impl_node_add_port(void *object, enum spa_direction direction, uint32_t port_id,
+		const struct spa_dict *props)
+{
+	return -ENOTSUP;
+}
+
+static int
+impl_node_remove_port(void *object, enum spa_direction direction, uint32_t port_id)
+{
+	return -ENOTSUP;
+}
+
+static int impl_node_set_io(void *object, uint32_t id, void *data, size_t size)
+{
+	return -ENOTSUP;
+}
+
+static int do_start(struct impl *this)
+{
+	if (this->started_node)
+		return 0;
+
+	spa_log_debug(this->log, "Open compressed device: %s", this->props.device);
+	if (open_compress(this) < 0)
+		return -EINVAL;
+
+	this->started_node = true;
+	this->started_compress = false;
+
+	return 0;
+}
+
+static int do_drain(struct impl *this)
+{
+	if (!this->started_node)
+		return 0;
+
+	if (this->started_compress) {
+		spa_log_debug(this->log, NAME " %p: Issuing drain command", this);
+		compress_drain(this->compress);
+		spa_log_debug(this->log, NAME " %p: Finished drain", this);
+	}
+
+	return 0;
+}
+
+static int do_stop(struct impl *this)
+{
+	if (!this->started_node)
+		return 0;
+
+	compress_stop(this->compress);
+	compress_close(this->compress);
+	spa_log_info(this->log, NAME " %p: Closed compress device", this);
+
+	this->compress = NULL;
+	this->started_node = false;
+	this->started_compress = false;
+
+	return 0;
+}
+
+static int impl_node_send_command(void *object, const struct spa_command *command)
+{
+	struct impl *this = object;
+	struct port *port;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(command != NULL, -EINVAL);
+
+	port = &this->port;
+
+	switch (SPA_NODE_COMMAND_ID(command)) {
+	case SPA_NODE_COMMAND_Start:
+	{
+		if (!port->have_format)
+			return -EIO;
+		if (port->n_buffers == 0)
+			return -EIO;
+
+		do_start(this);
+		break;
+	}
+	case SPA_NODE_COMMAND_Pause:
+	case SPA_NODE_COMMAND_Suspend:
+		do_drain(this);
+		do_stop(this);
+		break;
+
+	default:
+		return -ENOTSUP;
+	}
+	return 0;
+}
+
+static int
+impl_node_add_listener(void *object,
+		struct spa_hook *listener,
+		const struct spa_node_events *events,
+		void *data)
+{
+	struct impl *this = object;
+	struct spa_hook_list save;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_hook_list_isolate(&this->hooks, &save, listener, events, data);
+
+	emit_node_info(this, true);
+	emit_port_info(this, &this->port, true);
+
+	spa_hook_list_join(&this->hooks, &save);
+
+	return 0;
+}
+
+static int
+impl_node_set_callbacks(void *object,
+			const struct spa_node_callbacks *callbacks,
+			void *data)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	this->callbacks = SPA_CALLBACKS_INIT(callbacks, data);
+
+	return 0;
+}
+
+static int
+port_enum_formats(struct impl *this,
+		  enum spa_direction direction, uint32_t port_id,
+		  uint32_t index,
+		  struct spa_pod **param,
+		  struct spa_pod_builder *builder)
+{
+	struct spa_audio_info info;
+	uint32_t codec;
+
+	if (index >= this->num_codecs)
+		return 0;
+
+	codec = this->codecs_supported[index];
+
+	spa_zero(info);
+	info.media_type = SPA_MEDIA_TYPE_audio;
+
+	switch (codec) {
+	case SND_AUDIOCODEC_MP3:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_mp3;
+		info.info.mp3.rate = this->props.rate;
+		info.info.mp3.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_AAC:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_aac;
+		info.info.aac.rate = this->props.rate;
+		info.info.aac.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_WMA:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_wma;
+		info.info.wma.rate = this->props.rate;
+		info.info.wma.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_VORBIS:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_vorbis;
+		info.info.vorbis.rate = this->props.rate;
+		info.info.vorbis.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_FLAC:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_flac;
+		info.info.flac.rate = this->props.rate;
+		info.info.flac.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_ALAC:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_alac;
+		info.info.alac.rate = this->props.rate;
+		info.info.alac.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_APE:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_ape;
+		info.info.ape.rate = this->props.rate;
+		info.info.ape.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_REAL:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_ra;
+		info.info.ra.rate = this->props.rate;
+		info.info.ra.channels = this->props.channels;
+		break;
+	case SND_AUDIOCODEC_AMR:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_amr;
+		info.info.amr.rate = this->props.rate;
+		info.info.amr.channels = this->props.channels;
+		info.info.amr.band_mode = SPA_AUDIO_AMR_BAND_MODE_NB;
+		break;
+	case SND_AUDIOCODEC_AMRWB:
+		info.media_subtype = SPA_MEDIA_SUBTYPE_amr;
+		info.info.amr.rate = this->props.rate;
+		info.info.amr.channels = this->props.channels;
+		info.info.amr.band_mode = SPA_AUDIO_AMR_BAND_MODE_WB;
+		break;
+	default:
+		return -ENOTSUP;
+	}
+	if ((*param = spa_format_audio_build(builder, SPA_PARAM_EnumFormat, &info)) == NULL)
+		return -errno;
+	return 1;
+}
+
+static int
+impl_node_port_enum_params(void *object, int seq,
+			enum spa_direction direction, uint32_t port_id,
+			uint32_t id, uint32_t start, uint32_t num,
+			const struct spa_pod *filter)
+{
+	struct impl *this = object;
+	struct port *port;
+	struct spa_pod_builder b = { 0 };
+	uint8_t buffer[1024];
+	struct spa_pod *param;
+	struct spa_result_node_params result;
+	uint32_t count = 0;
+	int res;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+	spa_return_val_if_fail(num != 0, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = &this->port;
+
+	result.id = id;
+	result.next = start;
+      next:
+	result.index = result.next++;
+
+	spa_pod_builder_init(&b, buffer, sizeof(buffer));
+
+	switch (id) {
+	case SPA_PARAM_EnumFormat:
+		if ((res = port_enum_formats(this, direction, port_id,
+						result.index, &param, &b)) <= 0)
+			return res;
+		break;
+
+	case SPA_PARAM_Format:
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		param = spa_format_audio_build(&b, id, &port->current_format);
+		break;
+
+	case SPA_PARAM_Buffers:
+		if (!port->have_format)
+			return -EIO;
+		if (result.index > 0)
+			return 0;
+
+		param = spa_pod_builder_add_object(&b,
+			SPA_TYPE_OBJECT_ParamBuffers, id,
+			SPA_PARAM_BUFFERS_buffers, SPA_POD_CHOICE_RANGE_Int(1, 1, MAX_BUFFERS),
+			SPA_PARAM_BUFFERS_blocks,  SPA_POD_Int(0),
+			SPA_PARAM_BUFFERS_size,    SPA_POD_CHOICE_RANGE_Int(
+							MIN_FRAGMENT_SIZE * MIN_NUM_FRAGMENTS,
+							MIN_FRAGMENT_SIZE * MIN_NUM_FRAGMENTS,
+							MAX_FRAGMENT_SIZE),
+			SPA_PARAM_BUFFERS_stride,  SPA_POD_Int(0));
+		break;
+	case SPA_PARAM_IO:
+		switch (result.index) {
+		case 0:
+			param = spa_pod_builder_add_object(&b,
+				SPA_TYPE_OBJECT_ParamIO, id,
+				SPA_PARAM_IO_id,   SPA_POD_Id(SPA_IO_Buffers),
+				SPA_PARAM_IO_size, SPA_POD_Int(sizeof(struct spa_io_buffers)));
+			break;
+		default:
+			return 0;
+		}
+		break;
+	default:
+		return -ENOENT;
+	}
+
+	if (spa_pod_filter(&b, &result.param, param, filter) < 0)
+		goto next;
+
+	spa_node_emit_result(&this->hooks, seq, 0, SPA_RESULT_TYPE_NODE_PARAMS, &result);
+
+	if (++count != num)
+		goto next;
+
+	return 0;
+}
+
+static int clear_buffers(struct impl *this, struct port *port)
+{
+	if (port->n_buffers > 0) {
+		spa_log_info(this->log, NAME " %p: clear buffers", this);
+		port->n_buffers = 0;
+		this->started_node = false;
+	}
+	return 0;
+}
+
+static int
+compress_setup(struct impl *this, struct spa_audio_info *info, uint32_t *out_rate)
+{
+	struct compr_config *config;
+	struct snd_codec *codec;
+	uint32_t channels, rate;
+
+	memset(&this->codec, 0, sizeof(this->codec));
+	memset(&this->compr_conf, 0, sizeof(this->compr_conf));
+
+	config = &this->compr_conf;
+	codec = &this->codec;
+
+	switch (info->media_subtype) {
+	case SPA_MEDIA_SUBTYPE_vorbis:
+		codec->id = SND_AUDIOCODEC_VORBIS;
+		rate = info->info.vorbis.rate;
+		channels = info->info.vorbis.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_mp3:
+		codec->id = SND_AUDIOCODEC_MP3;
+		rate = info->info.mp3.rate;
+		channels = info->info.mp3.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_aac:
+		codec->id = SND_AUDIOCODEC_AAC;
+		rate = info->info.aac.rate;
+		channels = info->info.aac.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_flac:
+		codec->id = SND_AUDIOCODEC_FLAC;
+		/*
+		 * Taken from the fcplay utility in tinycompress. Required for
+		 * FLAC to work.
+		 */
+		codec->options.flac_d.sample_size = 16;
+		codec->options.flac_d.min_blk_size = 16;
+		codec->options.flac_d.max_blk_size = 65535;
+		codec->options.flac_d.min_frame_size = 11;
+		codec->options.flac_d.max_frame_size = 8192 * 4;
+		rate = info->info.flac.rate;
+		channels = info->info.flac.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_wma:
+		codec->id = SND_AUDIOCODEC_WMA;
+		/*
+		 * WMA does not work with Compress-Offload if codec profile
+		 * is not set.
+		 */
+		switch (info->info.wma.profile) {
+		case SPA_AUDIO_WMA_PROFILE_WMA9:
+			codec->profile = SND_AUDIOPROFILE_WMA9;
+			break;
+		case SPA_AUDIO_WMA_PROFILE_WMA9_PRO:
+			codec->profile = SND_AUDIOPROFILE_WMA9_PRO;
+			break;
+		case SPA_AUDIO_WMA_PROFILE_WMA9_LOSSLESS:
+			codec->profile = SND_AUDIOPROFILE_WMA9_LOSSLESS;
+			break;
+		case SPA_AUDIO_WMA_PROFILE_WMA10:
+			codec->profile = SND_AUDIOPROFILE_WMA10;
+			break;
+		case SPA_AUDIO_WMA_PROFILE_WMA10_LOSSLESS:
+			codec->profile = SND_AUDIOPROFILE_WMA10_LOSSLESS;
+			break;
+		default:
+			spa_log_error(this->log, NAME " %p: Invalid WMA codec profile", this);
+			return -EINVAL;
+		}
+		codec->bit_rate = info->info.wma.bitrate;
+		codec->align = info->info.wma.block_align;
+		rate = info->info.wma.rate;
+		channels = info->info.wma.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_alac:
+		codec->id = SND_AUDIOCODEC_ALAC;
+		rate = info->info.alac.rate;
+		channels = info->info.alac.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_ape:
+		codec->id = SND_AUDIOCODEC_APE;
+		rate = info->info.ape.rate;
+		channels = info->info.ape.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_ra:
+		codec->id = SND_AUDIOCODEC_REAL;
+		rate = info->info.ra.rate;
+		channels = info->info.ra.channels;
+		break;
+	case SPA_MEDIA_SUBTYPE_amr:
+		if (info->info.amr.band_mode == SPA_AUDIO_AMR_BAND_MODE_WB)
+			codec->id = SND_AUDIOCODEC_AMRWB;
+		else
+			codec->id = SND_AUDIOCODEC_AMR;
+		rate = info->info.amr.rate;
+		channels = info->info.amr.channels;
+		break;
+		break;
+	default:
+		return -ENOTSUP;
+	}
+
+	codec->ch_in = channels;
+	codec->ch_out = channels;
+	codec->sample_rate = rate;
+	*out_rate = rate;
+
+	codec->rate_control = 0;
+	codec->level = 0;
+	codec->ch_mode = 0;
+	codec->format = 0;
+
+	spa_log_info(this->log, NAME " %p: Codec info, profile: %d align: %d rate: %d bitrate: %d",
+			this, codec->profile, codec->align, codec->sample_rate, codec->bit_rate);
+
+	if (!is_codec_supported_by_name(this->props.device, 0, codec)) {
+		spa_log_error(this->log, NAME " %p: Requested codec is not supported by DSP", this);
+		return -EINVAL;
+	}
+
+	config->codec = codec;
+	config->fragment_size = MIN_FRAGMENT_SIZE;
+	config->fragments = MIN_NUM_FRAGMENTS;
+
+	return 0;
+}
+
+static int
+port_set_format(struct impl *this,
+		enum spa_direction direction,
+		uint32_t port_id,
+		uint32_t flags,
+		const struct spa_pod *format)
+{
+	int res;
+	struct port *port = &this->port;
+
+	if (format == NULL) {
+		port->have_format = false;
+		clear_buffers(this, port);
+	} else {
+		struct spa_audio_info info = { 0 };
+		uint32_t rate;
+
+		if ((res = spa_format_audio_parse(format, &info)) < 0) {
+			spa_log_error(this->log, NAME " %p: format parse error: %s", this,
+					spa_strerror(res));
+			return res;
+		}
+
+		if ((res = compress_setup(this, &info, &rate)) < 0) {
+			spa_log_error(this->log, NAME " %p: can't setup compress: %s",
+					this, spa_strerror(res));
+			return res;
+		}
+
+		port->current_format = info;
+		port->have_format = true;
+		port->info.rate = SPA_FRACTION(1, rate);
+	}
+
+	this->info.change_mask |= SPA_NODE_CHANGE_MASK_FLAGS;
+	this->info.flags &= ~SPA_NODE_FLAG_NEED_CONFIGURE;
+	emit_node_info(this, false);
+
+	port->info.change_mask |= SPA_PORT_CHANGE_MASK_RATE;
+	port->info.change_mask |= SPA_PORT_CHANGE_MASK_PARAMS;
+
+	if (port->have_format) {
+		port->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_READWRITE);
+		port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Buffers, SPA_PARAM_INFO_READ);
+	} else {
+		port->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+		port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	}
+
+	emit_port_info(this, port, false);
+
+	return 0;
+}
+
+static int
+impl_node_port_set_param(void *object,
+			 enum spa_direction direction, uint32_t port_id,
+			 uint32_t id, uint32_t flags,
+			 const struct spa_pod *param)
+{
+	struct impl *this = object;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	switch (id) {
+	case SPA_PARAM_Format:
+		return port_set_format(this, direction, port_id, flags, param);
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int
+impl_node_port_use_buffers(void *object,
+			   enum spa_direction direction,
+			   uint32_t port_id,
+			   uint32_t flags,
+			   struct spa_buffer **buffers,
+			   uint32_t n_buffers)
+{
+	struct impl *this = object;
+	struct port *port;
+	uint32_t i;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = &this->port;
+
+	if (!port->have_format)
+		return -EIO;
+
+	clear_buffers(this, port);
+
+	for (i = 0; i < n_buffers; i++) {
+		struct buffer *b;
+		struct spa_data *d = buffers[i]->datas;
+
+		b = &port->buffers[i];
+		b->id = i;
+		b->flags = 0;
+		b->outbuf = buffers[i];
+
+		if (d[0].data == NULL) {
+			spa_log_error(this->log, NAME " %p: invalid memory on buffer %p", this,
+				      buffers[i]);
+			return -EINVAL;
+		}
+	}
+	port->n_buffers = n_buffers;
+
+	return 0;
+}
+
+static int
+impl_node_port_set_io(void *object,
+		      enum spa_direction direction,
+		      uint32_t port_id,
+		      uint32_t id,
+		      void *data, size_t size)
+{
+	struct impl *this = object;
+	struct port *port;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	spa_return_val_if_fail(CHECK_PORT(this, direction, port_id), -EINVAL);
+
+	port = &this->port;
+
+	switch (id) {
+	case SPA_IO_Buffers:
+		port->io = data;
+		break;
+	default:
+		return -ENOENT;
+	}
+	return 0;
+}
+
+static int impl_node_process(void *object)
+{
+	struct impl *this = object;
+	struct port *port;
+	struct spa_io_buffers *io;
+	struct buffer *b;
+	uint32_t i;
+
+	spa_return_val_if_fail(this != NULL, -EINVAL);
+
+	port = &this->port;
+
+	io = port->io;
+	spa_return_val_if_fail(io != NULL, -EIO);
+
+	if (io->status != SPA_STATUS_HAVE_DATA)
+		return io->status;
+
+	if (io->buffer_id >= port->n_buffers) {
+		io->status = -EINVAL;
+		return io->status;
+	}
+
+	b = &port->buffers[io->buffer_id];
+
+	for (i = 0; i < b->outbuf->n_datas; i++) {
+		int32_t offs, size;
+		int32_t wrote;
+		void *buf;
+
+		struct spa_data *d = b->outbuf->datas;
+		d = b->outbuf->datas;
+
+		offs = SPA_MIN(d->chunk->offset, d->maxsize);
+		size = SPA_MIN(d->maxsize - offs, d->chunk->size);
+		buf = SPA_PTROFF(d[0].data, offs, void);
+
+		wrote = write_compress(this, buf, size);
+		if (wrote < 0) {
+			spa_log_error(this->log, NAME " %p: Error playing sample: %s",
+					this, compress_get_error(this->compress));
+			io->status = wrote;
+			return SPA_STATUS_STOPPED;
+		}
+	}
+
+	io->status = SPA_STATUS_OK;
+
+	return SPA_STATUS_HAVE_DATA;
+}
+
+static const struct spa_node_methods impl_node = {
+	SPA_VERSION_NODE_METHODS,
+	.add_listener = impl_node_add_listener,
+	.set_callbacks = impl_node_set_callbacks,
+	.enum_params = impl_node_enum_params,
+	.set_io = impl_node_set_io,
+	.send_command = impl_node_send_command,
+	.add_port = impl_node_add_port,
+	.remove_port = impl_node_remove_port,
+	.port_enum_params = impl_node_port_enum_params,
+	.port_set_param = impl_node_port_set_param,
+	.port_use_buffers = impl_node_port_use_buffers,
+	.port_set_io = impl_node_port_set_io,
+	.process = impl_node_process,
+};
+
+static int impl_get_interface(struct spa_handle *handle, const char *type, void **interface)
+{
+	struct impl *this;
+
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+	spa_return_val_if_fail(interface != NULL, -EINVAL);
+
+	this = (struct impl *) handle;
+
+	if (spa_streq(type, SPA_TYPE_INTERFACE_Node))
+		*interface = &this->node;
+	else
+		return -ENOENT;
+
+	return 0;
+}
+
+static int impl_clear(struct spa_handle *handle)
+{
+	return 0;
+}
+
+static size_t
+impl_get_size(const struct spa_handle_factory *factory,
+	      const struct spa_dict *params)
+{
+	return sizeof(struct impl);
+}
+
+static int
+impl_init(const struct spa_handle_factory *factory,
+	  struct spa_handle *handle,
+	  const struct spa_dict *info,
+	  const struct spa_support *support,
+	  uint32_t n_support)
+{
+	struct impl *this;
+	struct port *port;
+	const char *str;
+	uint32_t i;
+
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(handle != NULL, -EINVAL);
+
+	handle->get_interface = impl_get_interface;
+	handle->clear = impl_clear;
+
+	this = (struct impl *) handle;
+
+	this->log = spa_support_find(support, n_support, SPA_TYPE_INTERFACE_Log);
+
+	spa_hook_list_init(&this->hooks);
+
+	this->node.iface = SPA_INTERFACE_INIT(
+			SPA_TYPE_INTERFACE_Node,
+			SPA_VERSION_NODE,
+			&impl_node, this);
+
+	this->info_all |= SPA_NODE_CHANGE_MASK_FLAGS |
+			SPA_NODE_CHANGE_MASK_PARAMS;
+	this->info = SPA_NODE_INFO_INIT();
+	this->info.max_input_ports = MAX_PORTS;
+	this->info.max_output_ports = 0;
+	this->info.flags = SPA_NODE_FLAG_RT |
+		SPA_NODE_FLAG_IN_PORT_CONFIG |
+		SPA_NODE_FLAG_NEED_CONFIGURE;
+	this->params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumPortConfig, SPA_PARAM_INFO_READ);
+	this->info.params = this->params;
+	this->info.n_params = 1;
+	reset_props(&this->props);
+
+	port = &this->port;
+	port->info_all = SPA_PORT_CHANGE_MASK_FLAGS |
+			SPA_PORT_CHANGE_MASK_PARAMS;
+	port->info = SPA_PORT_INFO_INIT();
+	port->info.flags = SPA_PORT_FLAG_NO_REF |
+			SPA_PORT_FLAG_LIVE |
+			SPA_PORT_FLAG_PHYSICAL |
+			SPA_PORT_FLAG_TERMINAL;
+	port->params[0] = SPA_PARAM_INFO(SPA_PARAM_EnumFormat, SPA_PARAM_INFO_READ);
+	port->params[1] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
+	port->params[2] = SPA_PARAM_INFO(SPA_PARAM_IO, SPA_PARAM_INFO_READ);
+	port->params[3] = SPA_PARAM_INFO(SPA_PARAM_Buffers, 0);
+	port->info.params = port->params;
+	port->info.n_params = 4;
+	port->written = 0;
+
+	for (i = 0; info && i < info->n_items; i++) {
+		const char *k = info->items[i].key;
+		const char *s = info->items[i].value;
+		if (spa_streq(k, "clock.quantum-limit")) {
+			spa_atou32(s, &this->quantum_limit, 0);
+		} else if (spa_streq(k, SPA_KEY_AUDIO_CHANNELS)) {
+			this->props.channels = atoi(s);
+		} else if (spa_streq(k, SPA_KEY_AUDIO_RATE)) {
+			this->props.rate = atoi(s);
+		}
+	}
+
+	if (info && (str = spa_dict_lookup(info, SPA_KEY_API_ALSA_PATH))) {
+		if ((str[0] == 'h') || (str[1] == 'w') || (str[2] == ':')) {
+			snprintf(this->props.device, sizeof(this->props.device), "%s", str);
+		} else {
+			spa_log_error(this->log, NAME " %p: Invalid Compress-Offload hw %s", this, str);
+			return -EINVAL;
+		}
+	} else {
+		spa_log_error(this->log, NAME " %p: Invalid compress hw", this);
+		return -EINVAL;
+	}
+
+	/*
+	 * TODO:
+	 *
+	 * Move this to use new compress_get_supported_codecs_by_name API once
+	 * merged upstream.
+	 *
+	 * Right now, we pretend all codecs are supported and then error out
+	 * at runtime in port_set_format during compress_setup if not
+	 * supported.
+	 */
+	this->num_codecs = SPA_N_ELEMENTS (codec_info);
+	for (i = 0; i < this->num_codecs; i++) {
+		this->codecs_supported[i] = codec_info[i].codec_id;
+	}
+
+	spa_log_info(this->log, NAME " %p: Initialized Compress-Offload sink %s",
+			this, this->props.device);
+
+	return 0;
+}
+
+static const struct spa_interface_info impl_interfaces[] = {
+	{SPA_TYPE_INTERFACE_Node,},
+};
+
+static int
+impl_enum_interface_info(const struct spa_handle_factory *factory,
+			 const struct spa_interface_info **info,
+			 uint32_t *index)
+{
+	spa_return_val_if_fail(factory != NULL, -EINVAL);
+	spa_return_val_if_fail(info != NULL, -EINVAL);
+	spa_return_val_if_fail(index != NULL, -EINVAL);
+
+	switch (*index) {
+	case 0:
+		*info = &impl_interfaces[*index];
+		break;
+	default:
+		return 0;
+	}
+	(*index)++;
+
+	return 1;
+}
+
+static const struct spa_dict_item info_items[] = {
+	{ SPA_KEY_FACTORY_AUTHOR, "Sanchayan Maity <sanchayan@asymptotic.io>" },
+	{ SPA_KEY_FACTORY_DESCRIPTION, "Play compressed audio (like MP3 or AAC) with the ALSA Compress-Offload API" },
+	{ SPA_KEY_FACTORY_USAGE, "["SPA_KEY_API_ALSA_PATH"=<path>]" },
+};
+
+static const struct spa_dict info = SPA_DICT_INIT_ARRAY(info_items);
+
+const struct spa_handle_factory spa_alsa_compress_offload_sink_factory = {
+	SPA_VERSION_HANDLE_FACTORY,
+	SPA_NAME_API_ALSA_COMPRESS_OFFLOAD_SINK,
+	&info,
+	impl_get_size,
+	impl_init,
+	impl_enum_interface_info,
+};