audio HAL: add support for MMAP no IRQ mode streams. (0e46adf2) · Commits · e / os / android_hardware_qcom_audio

hal/audio_hw.c

+473 −91

Original line number	Diff line number	Diff line
		@@ -83,6 +83,11 @@
		static unsigned int configured_low_latency_capture_period_size =
		LOW_LATENCY_CAPTURE_PERIOD_SIZE;


		#define MMAP_PERIOD_SIZE (DEFAULT_OUTPUT_SAMPLING_RATE/1000)
		#define MMAP_PERIOD_COUNT 512


		/* This constant enables extended precision handling.
		* TODO The flag is off until more testing is done.
		*/
		@@ -135,6 +140,19 @@ struct pcm_config pcm_config_hdmi_multi = {
		.avail_min = 0,
		};

		struct pcm_config pcm_config_mmap_playback = {
		.channels = DEFAULT_CHANNEL_COUNT,
		.rate = DEFAULT_OUTPUT_SAMPLING_RATE,
		.period_size = MMAP_PERIOD_SIZE,
		.period_count = MMAP_PERIOD_COUNT,
		.format = PCM_FORMAT_S16_LE,
		.start_threshold = MMAP_PERIOD_SIZE*8,
		.stop_threshold = INT32_MAX,
		.silence_threshold = 0,
		.silence_size = 0,
		.avail_min = MMAP_PERIOD_SIZE, //1 ms
		};

		struct pcm_config pcm_config_audio_capture = {
		.channels = DEFAULT_CHANNEL_COUNT,
		.period_count = AUDIO_CAPTURE_PERIOD_COUNT,
		@@ -156,6 +174,19 @@ struct pcm_config pcm_config_audio_capture_rt = {
		.avail_min = ULL_PERIOD_SIZE, //1 ms
		};

		struct pcm_config pcm_config_mmap_capture = {
		.channels = DEFAULT_CHANNEL_COUNT,
		.rate = DEFAULT_OUTPUT_SAMPLING_RATE,
		.period_size = MMAP_PERIOD_SIZE,
		.period_count = MMAP_PERIOD_COUNT,
		.format = PCM_FORMAT_S16_LE,
		.start_threshold = 0,
		.stop_threshold = INT_MAX,
		.silence_threshold = 0,
		.silence_size = 0,
		.avail_min = MMAP_PERIOD_SIZE, //1 ms
		};

		#define AFE_PROXY_CHANNEL_COUNT 2
		#define AFE_PROXY_SAMPLING_RATE 48000

		@@ -194,9 +225,11 @@ const char * const use_case_table[AUDIO_USECASE_MAX] = {
		[USECASE_AUDIO_PLAYBACK_OFFLOAD] = "compress-offload-playback",
		[USECASE_AUDIO_PLAYBACK_TTS] = "audio-tts-playback",
		[USECASE_AUDIO_PLAYBACK_ULL] = "audio-ull-playback",
		[USECASE_AUDIO_PLAYBACK_MMAP] = "mmap-playback",

		[USECASE_AUDIO_RECORD] = "audio-record",
		[USECASE_AUDIO_RECORD_LOW_LATENCY] = "low-latency-record",
		[USECASE_AUDIO_RECORD_MMAP] = "mmap-record",

		[USECASE_AUDIO_HFP_SCO] = "hfp-sco",
		[USECASE_AUDIO_HFP_SCO_WB] = "hfp-sco-wb",
		@@ -1276,9 +1309,21 @@ int start_input_stream(struct stream_in *in)

		select_devices(adev, in->usecase);

		ALOGV("%s: Opening PCM device card_id(%d) device_id(%d), channels %d",
		__func__, adev->snd_card, in->pcm_device_id, in->config.channels);

		if (in->usecase == USECASE_AUDIO_RECORD_MMAP) {
		if (!pcm_is_ready(in->pcm)) {
		ALOGE("%s: pcm stream not ready", __func__);
		goto error_open;
		}
		ret = pcm_prepare(in->pcm);
		if (ret < 0) {
		ALOGE("%s: MMAP pcm_prepare failed ret %d", __func__, ret);
		goto error_open; }
		ret = pcm_start(in->pcm);
		if (ret < 0) {
		ALOGE("%s: MMAP pcm_start failed ret %d", __func__, ret);
		goto error_open;
		}
		} else {
		unsigned int flags = PCM_IN \| PCM_MONOTONIC;
		unsigned int pcm_open_retry_count = 0;

		@@ -1289,6 +1334,9 @@ int start_input_stream(struct stream_in *in)
		flags \|= PCM_MMAP \| PCM_NOIRQ;
		}

		ALOGV("%s: Opening PCM device card_id(%d) device_id(%d), channels %d",
		__func__, adev->snd_card, in->pcm_device_id, in->config.channels);

		while (1) {
		in->pcm = pcm_open(adev->snd_card, in->pcm_device_id,
		flags, &in->config);
		@@ -1325,11 +1373,12 @@ int start_input_stream(struct stream_in *in)
		goto error_open;
		}
		}
		}
		register_in_stream(in);
		audio_extn_perf_lock_release();
		ALOGV("%s: exit", __func__);

		return ret;
		return 0;

		error_open:
		stop_input_stream(in);
		@@ -1667,7 +1716,39 @@ int start_output_stream(struct stream_out *out)

		ALOGV("%s: Opening PCM device card_id(%d) device_id(%d) format(%#x)",
		__func__, adev->snd_card, out->pcm_device_id, out->config.format);
		if (out->usecase != USECASE_AUDIO_PLAYBACK_OFFLOAD) {
		if (out->usecase == USECASE_AUDIO_PLAYBACK_OFFLOAD) {
		out->pcm = NULL;
		out->compr = compress_open(adev->snd_card, out->pcm_device_id,
		COMPRESS_IN, &out->compr_config);
		if (out->compr && !is_compress_ready(out->compr)) {
		ALOGE("%s: %s", __func__, compress_get_error(out->compr));
		compress_close(out->compr);
		out->compr = NULL;
		ret = -EIO;
		goto error_open;
		}
		if (out->offload_callback)
		compress_nonblock(out->compr, out->non_blocking);

		if (adev->visualizer_start_output != NULL)
		adev->visualizer_start_output(out->handle, out->pcm_device_id);
		if (adev->offload_effects_start_output != NULL)
		adev->offload_effects_start_output(out->handle, out->pcm_device_id);
		} else if (out->usecase == USECASE_AUDIO_PLAYBACK_MMAP) {
		if (!pcm_is_ready(out->pcm)) {
		ALOGE("%s: pcm stream not ready", __func__);
		goto error_open;
		}
		ret = pcm_prepare(out->pcm);
		if (ret < 0) {
		ALOGE("%s: MMAP pcm_prepare failed ret %d", __func__, ret);
		goto error_open; }
		ret = pcm_start(out->pcm);
		if (ret < 0) {
		ALOGE("%s: MMAP pcm_start failed ret %d", __func__, ret);
		goto error_open;
		}
		} else {
		unsigned int flags = PCM_OUT;
		unsigned int pcm_open_retry_count = 0;

		@@ -1707,26 +1788,6 @@ int start_output_stream(struct stream_out *out)
		goto error_open;
		}
		}
		} else {
		out->pcm = NULL;
		out->compr = compress_open(adev->snd_card, out->pcm_device_id,
		COMPRESS_IN, &out->compr_config);
		if (out->compr && !is_compress_ready(out->compr)) {
		ALOGE("%s: %s", __func__, compress_get_error(out->compr));
		compress_close(out->compr);
		out->compr = NULL;
		ret = -EIO;
		goto error_open;
		}
		if (out->offload_callback)
		compress_nonblock(out->compr, out->non_blocking);

		if (adev->visualizer_start_output != NULL)
		adev->visualizer_start_output(out->handle, out->pcm_device_id);
		if (adev->offload_effects_start_output != NULL)
		adev->offload_effects_start_output(out->handle, out->pcm_device_id);
		}
		ret = 0;
		if (out->realtime) {
		ret = pcm_start(out->pcm);
		if (ret < 0) {
		@@ -1736,12 +1797,13 @@ int start_output_stream(struct stream_out *out)
		goto error_open;
		}
		}
		}
		register_out_stream(out);
		audio_extn_perf_lock_release();
		audio_extn_tfa_98xx_enable_speaker();

		ALOGV("%s: exit", __func__);
		return ret;
		return 0;
		error_open:
		audio_extn_perf_lock_release();
		stop_output_stream(out);
		@@ -1864,7 +1926,6 @@ static int out_standby(struct audio_stream *stream)
		if (!out->standby) {
		if (adev->adm_deregister_stream)
		adev->adm_deregister_stream(adev->adm_data, out->handle);

		pthread_mutex_lock(&adev->lock);
		out->standby = true;
		if (out->usecase != USECASE_AUDIO_PLAYBACK_OFFLOAD) {
		@@ -1872,6 +1933,9 @@ static int out_standby(struct audio_stream *stream)
		pcm_close(out->pcm);
		out->pcm = NULL;
		}
		if (out->usecase == USECASE_AUDIO_PLAYBACK_MMAP) {
		out->playback_started = false;
		}
		} else {
		stop_compressed_output_l(out);
		out->gapless_mdata.encoder_delay = 0;
		@@ -2111,7 +2175,8 @@ static uint32_t out_get_latency(const struct audio_stream_out *stream)

		if (out->usecase == USECASE_AUDIO_PLAYBACK_OFFLOAD)
		return COMPRESS_OFFLOAD_PLAYBACK_LATENCY;
		else if (out->realtime) {
		else if ((out->realtime) \|\|
		(out->usecase == USECASE_AUDIO_PLAYBACK_MMAP)) {
		// since the buffer won't be filled up faster than realtime,
		// return a smaller number
		period_ms = (out->af_period_multiplier * out->config.period_size *
		@@ -2225,6 +2290,10 @@ static ssize_t out_write(struct audio_stream_out stream, const void buffer,
		int error_code = ERROR_CODE_STANDBY;

		lock_output_stream(out);
		if (out->usecase == USECASE_AUDIO_PLAYBACK_MMAP) {
		error_code = ERROR_CODE_WRITE;
		goto exit;
		}
		if (out->standby) {
		out->standby = false;
		pthread_mutex_lock(&adev->lock);
		@@ -2243,7 +2312,7 @@ static ssize_t out_write(struct audio_stream_out stream, const void buffer,
		}

		if (out->usecase == USECASE_AUDIO_PLAYBACK_OFFLOAD) {
		ALOGVV("%s: writing buffer (%d bytes) to compress device", __func__, bytes);
		ALOGVV("%s: writing buffer (%zu bytes) to compress device", __func__, bytes);
		if (out->send_new_metadata) {
		ALOGVV("send new gapless metadata");
		compress_set_gapless_metadata(out->compr, &out->gapless_mdata);
		@@ -2286,7 +2355,7 @@ static ssize_t out_write(struct audio_stream_out stream, const void buffer,
		if (out->muted)
		memset((void *)buffer, 0, bytes);

		ALOGVV("%s: writing buffer (%d bytes) to pcm device", __func__, bytes);
		ALOGVV("%s: writing buffer (%zu bytes) to pcm device", __func__, bytes);

		long ns = pcm_bytes_to_frames(out->pcm, bytes)*1000000000LL/
		out->config.rate;
		@@ -2491,6 +2560,143 @@ static int out_flush(struct audio_stream_out* stream)
		return -ENOSYS;
		}

		static int out_stop(const struct audio_stream_out* stream)
		{
		struct stream_out out = (struct stream_out )stream;
		struct audio_device *adev = out->dev;
		int ret = -ENOSYS;

		ALOGV("%s", __func__);
		pthread_mutex_lock(&adev->lock);
		if (out->usecase == USECASE_AUDIO_PLAYBACK_MMAP && !out->standby &&
		out->playback_started && out->pcm != NULL) {
		pcm_stop(out->pcm);
		ret = stop_output_stream(out);
		if (ret == 0) {
		out->playback_started = false;
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int out_start(const struct audio_stream_out* stream)
		{
		struct stream_out out = (struct stream_out )stream;
		struct audio_device *adev = out->dev;
		int ret = -ENOSYS;

		ALOGV("%s", __func__);
		pthread_mutex_lock(&adev->lock);
		if (out->usecase == USECASE_AUDIO_PLAYBACK_MMAP && !out->standby &&
		!out->playback_started && out->pcm != NULL) {
		ret = start_output_stream(out);
		if (ret == 0) {
		out->playback_started = true;
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int out_create_mmap_buffer(const struct audio_stream_out *stream,
		int32_t min_size_frames,
		struct audio_mmap_buffer_info *info)
		{
		struct stream_out out = (struct stream_out )stream;
		struct audio_device *adev = out->dev;
		int ret = 0;
		unsigned int offset1;
		unsigned int frames1;
		const char *step = "";

		ALOGV("%s", __func__);
		pthread_mutex_lock(&adev->lock);

		if (info == NULL \|\| min_size_frames == 0) {
		ret = -EINVAL;
		goto exit;
		}
		if (out->usecase != USECASE_AUDIO_PLAYBACK_MMAP \|\| !out->standby) {
		ret = -ENOSYS;
		goto exit;
		}
		out->pcm_device_id = platform_get_pcm_device_id(out->usecase, PCM_PLAYBACK);
		if (out->pcm_device_id < 0) {
		ALOGE("%s: Invalid PCM device id(%d) for the usecase(%d)",
		__func__, out->pcm_device_id, out->usecase);
		ret = -EINVAL;
		goto exit;
		}
		ALOGV("%s: Opening PCM device card_id(%d) device_id(%d), channels %d",
		__func__, adev->snd_card, out->pcm_device_id, out->config.channels);
		out->pcm = pcm_open(adev->snd_card, out->pcm_device_id,
		(PCM_OUT \| PCM_MMAP \| PCM_NOIRQ \| PCM_MONOTONIC), &out->config);
		if (out->pcm == NULL \|\| !pcm_is_ready(out->pcm)) {
		step = "open";
		ret = -ENODEV;
		goto exit;
		}
		ret = pcm_mmap_begin(out->pcm, &info->shared_memory_address, &offset1, &frames1);
		if (ret < 0) {
		step = "begin";
		goto exit;
		}
		info->buffer_size_frames = pcm_get_buffer_size(out->pcm);
		info->burst_size_frames = out->config.period_size;
		info->shared_memory_fd = pcm_get_poll_fd(out->pcm);

		memset(info->shared_memory_address, 0, pcm_frames_to_bytes(out->pcm,
		info->buffer_size_frames));

		ret = pcm_mmap_commit(out->pcm, 0, MMAP_PERIOD_SIZE);
		if (ret < 0) {
		step = "commit";
		goto exit;
		}
		ret = 0;

		ALOGV("%s: got mmap buffer address %p info->buffer_size_frames %d",
		__func__, info->shared_memory_address, info->buffer_size_frames);

		exit:
		if (ret != 0) {
		ALOGE("%s: %s %s", __func__, step, pcm_get_error(out->pcm));
		if (out->pcm != NULL) {
		pcm_close(out->pcm);
		out->pcm = NULL;
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int out_get_mmap_position(const struct audio_stream_out *stream,
		struct audio_mmap_position *position)
		{
		struct stream_out out = (struct stream_out )stream;
		ALOGVV("%s", __func__);
		if (position == NULL) {
		return -EINVAL;
		}
		if (out->usecase != USECASE_AUDIO_PLAYBACK_MMAP) {
		return -ENOSYS;
		}
		if (out->pcm == NULL) {
		return -ENOSYS;
		}

		struct timespec ts = { 0, 0 };
		int ret = pcm_mmap_get_hw_ptr(out->pcm, (unsigned int *)&position->position_frames, &ts);
		if (ret < 0) {
		ALOGE("%s: %s", __func__, pcm_get_error(out->pcm));
		return ret;
		}
		position->time_nanoseconds = ts2ns(&ts);
		return 0;
		}


		/ audio_stream_in implementation /
		static uint32_t in_get_sample_rate(const struct audio_stream *stream)
		{
		@@ -2551,6 +2757,9 @@ static int in_standby(struct audio_stream *stream)

		pthread_mutex_lock(&adev->lock);
		in->standby = true;
		if (in->usecase == USECASE_AUDIO_RECORD_MMAP) {
		in->capture_started = false;
		}
		if (in->pcm) {
		pcm_close(in->pcm);
		in->pcm = NULL;
		@@ -2678,13 +2887,18 @@ static ssize_t in_read(struct audio_stream_in stream, void buffer,
		lock_input_stream(in);

		if (in->is_st_session) {
		ALOGVV(" %s: reading on st session bytes=%d", __func__, bytes);
		ALOGVV(" %s: reading on st session bytes=%zu", __func__, bytes);
		/* Read from sound trigger HAL */
		audio_extn_sound_trigger_read(in, buffer, bytes);
		pthread_mutex_unlock(&in->lock);
		return bytes;
		}

		if (in->usecase == USECASE_AUDIO_RECORD_MMAP) {
		ret = -ENOSYS;
		goto exit;
		}

		if (in->standby) {
		pthread_mutex_lock(&adev->lock);
		ret = start_input_stream(in);
		@@ -2845,6 +3059,146 @@ static int in_remove_audio_effect(const struct audio_stream *stream,
		return add_remove_audio_effect(stream, effect, false);
		}

		static int in_stop(const struct audio_stream_in* stream)
		{
		struct stream_in in = (struct stream_in )stream;
		struct audio_device *adev = in->dev;

		int ret = -ENOSYS;
		ALOGV("%s", __func__);
		pthread_mutex_lock(&adev->lock);
		if (in->usecase == USECASE_AUDIO_RECORD_MMAP && !in->standby &&
		in->capture_started && in->pcm != NULL) {
		pcm_stop(in->pcm);
		ret = stop_input_stream(in);
		if (ret == 0) {
		in->capture_started = false;
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int in_start(const struct audio_stream_in* stream)
		{
		struct stream_in in = (struct stream_in )stream;
		struct audio_device *adev = in->dev;
		int ret = -ENOSYS;

		ALOGV("%s in %p", __func__, in);
		pthread_mutex_lock(&adev->lock);
		if (in->usecase == USECASE_AUDIO_RECORD_MMAP && !in->standby &&
		!in->capture_started && in->pcm != NULL) {
		if (!in->capture_started) {
		ret = start_input_stream(in);
		if (ret == 0) {
		in->capture_started = true;
		}
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int in_create_mmap_buffer(const struct audio_stream_in *stream,
		int32_t min_size_frames,
		struct audio_mmap_buffer_info *info)
		{
		struct stream_in in = (struct stream_in )stream;
		struct audio_device *adev = in->dev;
		int ret = 0;
		unsigned int offset1;
		unsigned int frames1;
		const char *step = "";

		pthread_mutex_lock(&adev->lock);
		ALOGV("%s in %p", __func__, in);
		if (info == NULL \|\| min_size_frames == 0) {
		ALOGV("%s invalid argument info %p min_size_frames %d", __func__, info, min_size_frames);
		ret = -EINVAL;
		goto exit;
		}
		if (in->usecase != USECASE_AUDIO_RECORD_MMAP \|\| !in->standby) {
		ALOGV("%s in %p", __func__, in);
		ret = -ENOSYS;
		goto exit;
		}
		in->pcm_device_id = platform_get_pcm_device_id(in->usecase, PCM_CAPTURE);
		if (in->pcm_device_id < 0) {
		ALOGE("%s: Invalid PCM device id(%d) for the usecase(%d)",
		__func__, in->pcm_device_id, in->usecase);
		ret = -EINVAL;
		goto exit;
		}
		ALOGV("%s: Opening PCM device card_id(%d) device_id(%d), channels %d",
		__func__, adev->snd_card, in->pcm_device_id, in->config.channels);
		in->pcm = pcm_open(adev->snd_card, in->pcm_device_id,
		(PCM_IN \| PCM_MMAP \| PCM_NOIRQ \| PCM_MONOTONIC), &in->config);
		if (in->pcm == NULL \|\| !pcm_is_ready(in->pcm)) {
		step = "open";
		ret = -ENODEV;
		goto exit;
		}

		ret = pcm_mmap_begin(in->pcm, &info->shared_memory_address, &offset1, &frames1);
		if (ret < 0) {
		step = "begin";
		goto exit;
		}
		info->buffer_size_frames = pcm_get_buffer_size(in->pcm);
		info->burst_size_frames = in->config.period_size;
		info->shared_memory_fd = pcm_get_poll_fd(in->pcm);

		memset(info->shared_memory_address, 0, pcm_frames_to_bytes(in->pcm,
		info->buffer_size_frames));

		ret = pcm_mmap_commit(in->pcm, 0, MMAP_PERIOD_SIZE);
		if (ret < 0) {
		step = "commit";
		goto exit;
		}

		ALOGV("%s: got mmap buffer address %p info->buffer_size_frames %d",
		__func__, info->shared_memory_address, info->buffer_size_frames);
		ret = 0;

		exit:
		if (ret != 0) {
		ALOGE("%s: %s %s", __func__, step, pcm_get_error(in->pcm));
		if (in->pcm != NULL) {
		pcm_close(in->pcm);
		in->pcm = NULL;
		}
		}
		pthread_mutex_unlock(&adev->lock);
		return ret;
		}

		static int in_get_mmap_position(const struct audio_stream_in *stream,
		struct audio_mmap_position *position)
		{
		struct stream_in in = (struct stream_in )stream;
		ALOGVV("%s", __func__);
		if (position == NULL) {
		return -EINVAL;
		}
		if (in->usecase != USECASE_AUDIO_RECORD_MMAP) {
		return -ENOSYS;
		}
		if (in->pcm == NULL) {
		return -ENOSYS;
		}
		struct timespec ts = { 0, 0 };
		int ret = pcm_mmap_get_hw_ptr(in->pcm, (unsigned int *)&position->position_frames, &ts);
		if (ret < 0) {
		ALOGE("%s: %s", __func__, pcm_get_error(in->pcm));
		return ret;
		}
		position->time_nanoseconds = ts2ns(&ts);
		return 0;
		}


		static int adev_open_output_stream(struct audio_hw_device *dev,
		audio_io_handle_t handle,
		audio_devices_t devices,
		@@ -2991,8 +3345,14 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		} else if (out->flags & AUDIO_OUTPUT_FLAG_RAW) {
		out->usecase = USECASE_AUDIO_PLAYBACK_ULL;
		out->realtime = may_use_noirq_mode(adev, USECASE_AUDIO_PLAYBACK_ULL, out->flags);
		out->usecase = USECASE_AUDIO_PLAYBACK_ULL;
		out->config = out->realtime ? pcm_config_rt : pcm_config_low_latency;
		} else if (out->flags & AUDIO_OUTPUT_FLAG_MMAP_NOIRQ) {
		out->usecase = USECASE_AUDIO_PLAYBACK_MMAP;
		out->config = pcm_config_mmap_playback;
		out->stream.start = out_start;
		out->stream.stop = out_stop;
		out->stream.create_mmap_buffer = out_create_mmap_buffer;
		out->stream.get_mmap_position = out_get_mmap_position;
		} else {
		out->usecase = USECASE_AUDIO_PLAYBACK_LOW_LATENCY;
		out->config = pcm_config_low_latency;
		@@ -3060,7 +3420,11 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		out->stream.get_next_write_timestamp = out_get_next_write_timestamp;
		out->stream.get_presentation_position = out_get_presentation_position;

		out->af_period_multiplier = out->realtime ? af_period_multiplier : 1;
		if (out->realtime)
		out->af_period_multiplier = af_period_multiplier;
		else
		out->af_period_multiplier = 1;

		out->standby = 1;
		/* out->muted = false; by calloc() */
		/* out->written = 0; by calloc() */
		@@ -3087,6 +3451,7 @@ static int adev_open_output_stream(struct audio_hw_device *dev,
		pthread_mutex_unlock(&out->lock);

		*stream_out = &out->stream;

		ALOGV("%s: exit", __func__);
		return 0;

		@@ -3420,20 +3785,12 @@ static int adev_open_input_stream(struct audio_hw_device *dev,
		} else {
		in->usecase = USECASE_AUDIO_RECORD;
		if (config->sample_rate == LOW_LATENCY_CAPTURE_SAMPLE_RATE &&
		(flags & AUDIO_INPUT_FLAG_FAST) != 0) {
		(in->flags & AUDIO_INPUT_FLAG_FAST) != 0) {
		is_low_latency = true;
		#if LOW_LATENCY_CAPTURE_USE_CASE
		in->usecase = USECASE_AUDIO_RECORD_LOW_LATENCY;
		#endif
		in->realtime = may_use_noirq_mode(adev, in->usecase, in->flags);
		}

		in->config = in->realtime ? pcm_config_audio_capture_rt :
		pcm_config_audio_capture;

		if (config->format == AUDIO_FORMAT_PCM_8_24_BIT)
		in->config.format = PCM_FORMAT_S24_LE;

		if (!in->realtime) {
		frame_size = audio_stream_in_frame_size(&in->stream);
		buffer_size = get_input_buffer_size(config->sample_rate,
		@@ -3441,16 +3798,40 @@ static int adev_open_input_stream(struct audio_hw_device *dev,
		channel_count,
		is_low_latency);
		in->config.period_size = buffer_size / frame_size;
		} // period size is left untouched for rt mode playback
		}

		in->config.channels = channel_count;
		if (in->realtime) {
		in->config = pcm_config_audio_capture;
		in->config.rate = config->sample_rate;
		in->af_period_multiplier = 1;
		} else {
		// period size is left untouched for rt mode playback
		in->config = pcm_config_audio_capture_rt;
		in->af_period_multiplier = af_period_multiplier;
		}
		} else if ((config->sample_rate == LOW_LATENCY_CAPTURE_SAMPLE_RATE) &&
		((in->flags & AUDIO_INPUT_FLAG_MMAP_NOIRQ) != 0)) {
		in->usecase = USECASE_AUDIO_RECORD_MMAP;
		in->config = pcm_config_mmap_capture;
		in->stream.start = in_start;
		in->stream.stop = in_stop;
		in->stream.create_mmap_buffer = in_create_mmap_buffer;
		in->stream.get_mmap_position = in_get_mmap_position;
		in->af_period_multiplier = 1;
		ALOGV("%s: USECASE_AUDIO_RECORD_MMAP", __func__);
		} else {
		in->config = pcm_config_audio_capture;
		frame_size = audio_stream_in_frame_size(&in->stream);
		buffer_size = get_input_buffer_size(config->sample_rate,
		config->format,
		channel_count,
		is_low_latency);
		in->config.period_size = buffer_size / frame_size;
		in->config.rate = config->sample_rate;
		in->af_period_multiplier = 1;
		}
		if (config->format == AUDIO_FORMAT_PCM_8_24_BIT)
		in->config.format = PCM_FORMAT_S24_LE;
		}

		in->config.channels = channel_count;

		/* This stream could be for sound trigger lab,
		get sound trigger pcm if present */
		@@ -3741,6 +4122,7 @@ static int adev_open(const hw_module_t module, const char name,
		adev->device.open_output_stream = adev_open_output_stream;
		adev->device.close_output_stream = adev_close_output_stream;
		adev->device.open_input_stream = adev_open_input_stream;

		adev->device.close_input_stream = adev_close_input_stream;
		adev->device.dump = adev_dump;

hal/audio_hw.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -71,6 +71,7 @@ enum {
		USECASE_AUDIO_PLAYBACK_OFFLOAD,
		USECASE_AUDIO_PLAYBACK_TTS,
		USECASE_AUDIO_PLAYBACK_ULL,
		USECASE_AUDIO_PLAYBACK_MMAP,

		/* HFP Use case*/
		USECASE_AUDIO_HFP_SCO,
		@@ -79,6 +80,7 @@ enum {
		/* Capture usecases */
		USECASE_AUDIO_RECORD,
		USECASE_AUDIO_RECORD_LOW_LATENCY,
		USECASE_AUDIO_RECORD_MMAP,

		/* Voice extension usecases
		*
		@@ -238,6 +240,7 @@ struct stream_in {
		struct audio_device *dev;
		audio_format_t format;
		card_status_t card_status;
		int capture_started;
		};

		typedef enum usecase_type_t {

hal/msm8974/platform.c

+11 −1

File changed.

Preview size limit exceeded, changes collapsed.

hal/msm8974/platform.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -215,6 +215,9 @@ enum {

		#define MULTIMEDIA3_PCM_DEVICE 4

		#define MMAP_PLAYBACK_PCM_DEVICE 18
		#define MMAP_RECORD_PCM_DEVICE 18

		#define QUAT_MI2S_PCM_DEVICE 44
		#define PLAYBACK_OFFLOAD_DEVICE 9
		#define LOWLATENCY_PCM_DEVICE 15