Add new AudioMixer processing hooks (296b741e) · Commits · e / os / android_frameworks_av

services/audioflinger/AudioMixer.cpp

+364 −44

Original line number	Diff line number	Diff line
		@@ -40,8 +40,36 @@

		#include <media/EffectsFactoryApi.h>

		#include "AudioMixerOps.h"
		#include "AudioMixer.h"

		// Use the FCC_2 macro for code assuming Fixed Channel Count of 2 and
		// whose stereo assumption may need to be revisited later.
		#ifndef FCC_2
		#define FCC_2 2
		#endif

		/* VERY_VERY_VERBOSE_LOGGING will show exactly which process hook and track hook is
		* being used. This is a considerable amount of log spam, so don't enable unless you
		* are verifying the hook based code.
		*/
		//#define VERY_VERY_VERBOSE_LOGGING
		#ifdef VERY_VERY_VERBOSE_LOGGING
		#define ALOGVV ALOGV
		//define ALOGVV printf // for test-mixer.cpp
		#else
		#define ALOGVV(a...) do { } while (0)
		#endif

		// Set kUseNewMixer to true to use the new mixer engine. Otherwise the
		// original code will be used. This is false for now.
		static const bool kUseNewMixer = false;

		// Set kUseFloat to true to allow floating input into the mixer engine.
		// If kUseNewMixer is false, this is ignored or may be overridden internally
		// because of downmix/upmix support.
		static const bool kUseFloat = true;

		namespace android {

		// ----------------------------------------------------------------------------
		@@ -300,15 +328,19 @@ int AudioMixer::getTrackName(audio_channel_mask_t channelMask,
		t->downmixerBufferProvider = NULL;
		t->mMixerFormat = AUDIO_FORMAT_PCM_16_BIT;
		t->mFormat = format;
		t->mMixerInFormat = AUDIO_FORMAT_PCM_16_BIT;
		if (t->mFormat != t->mMixerInFormat) {
		prepareTrackForReformat(t, n);
		}
		status_t status = initTrackDownmix(&mState.tracks[n], n, channelMask);
		t->mMixerInFormat = kUseFloat && kUseNewMixer
		? AUDIO_FORMAT_PCM_FLOAT : AUDIO_FORMAT_PCM_16_BIT;
		// Check the downmixing (or upmixing) requirements.
		status_t status = initTrackDownmix(t, n, channelMask);
		if (status != OK) {
		ALOGE("AudioMixer::getTrackName invalid channelMask (%#x)", channelMask);
		return -1;
		}
		// initTrackDownmix() may change the input format requirement.
		// If you desire floating point input to the mixer, it may change
		// to integer because the downmixer requires integer to process.
		ALOGVV("mMixerFormat:%#x mMixerInFormat:%#x\n", t->mMixerFormat, t->mMixerInFormat);
		prepareTrackForReformat(t, n);
		mTrackNames \|= 1 << n;
		return TRACK0 + n;
		}
		@@ -443,6 +475,7 @@ status_t AudioMixer::prepareTrackForDownmix(track_t* pTrack, int trackName)
		}// end of scope for local variables that are not used in goto label "noDownmixForActiveTrack"

		// initialization successful:
		pTrack->mMixerInFormat = AUDIO_FORMAT_PCM_16_BIT; // 16 bit input is required for downmix
		pTrack->downmixerBufferProvider = pDbp;
		reconfigureBufferProviders(pTrack);
		return NO_ERROR;
		@@ -468,10 +501,13 @@ status_t AudioMixer::prepareTrackForReformat(track_t* pTrack, int trackName)
		ALOGV("AudioMixer::prepareTrackForReformat(%d) with format %#x", trackName, pTrack->mFormat);
		// discard the previous reformatter if there was one
		unprepareTrackForReformat(pTrack, trackName);
		// only configure reformatter if needed
		if (pTrack->mFormat != pTrack->mMixerInFormat) {
		pTrack->mReformatBufferProvider = new ReformatBufferProvider(
		audio_channel_count_from_out_mask(pTrack->channelMask),
		pTrack->mFormat, pTrack->mMixerInFormat);
		reconfigureBufferProviders(pTrack);
		}
		return NO_ERROR;
		}

		@@ -596,8 +632,15 @@ void AudioMixer::setParameter(int name, int target, int param, void *value)
		track.channelMask = mask;
		track.channelCount = channelCount;
		// the mask has changed, does this track need a downmixer?
		initTrackDownmix(&mState.tracks[name], name, mask);
		// update to try using our desired format (if we aren't already using it)
		track.mMixerInFormat = kUseFloat && kUseNewMixer
		? AUDIO_FORMAT_PCM_FLOAT : AUDIO_FORMAT_PCM_16_BIT;
		status_t status = initTrackDownmix(&mState.tracks[name], name, mask);
		ALOGE_IF(status != OK,
		"Invalid channel mask %#x, initTrackDownmix returned %d",
		mask, status);
		ALOGV("setParameter(TRACK, CHANNEL_MASK, %x)", mask);
		prepareTrackForReformat(&track, name); // format may have changed
		invalidateState(1 << name);
		}
		} break;
		@@ -621,11 +664,7 @@ void AudioMixer::setParameter(int name, int target, int param, void *value)
		ALOG_ASSERT(audio_is_linear_pcm(format), "Invalid format %#x", format);
		track.mFormat = format;
		ALOGV("setParameter(TRACK, FORMAT, %#x)", format);
		//if (track.mFormat != track.mMixerInFormat)
		{
		ALOGD("Reformatting!");
		prepareTrackForReformat(&track, name);
		}
		invalidateState(1 << name);
		}
		} break;
		@@ -723,7 +762,20 @@ bool AudioMixer::track_t::setResampler(uint32_t value, uint32_t devSampleRate)
		} else {
		quality = AudioResampler::DEFAULT_QUALITY;
		}
		const int bits = mMixerInFormat == AUDIO_FORMAT_PCM_16_BIT ? 16 : /* FLOAT */ 32;

		int bits;
		switch (mMixerInFormat) {
		case AUDIO_FORMAT_PCM_16_BIT:
		bits = 16;
		break;
		case AUDIO_FORMAT_PCM_FLOAT:
		bits = 32; // 32 bits to the AudioResampler::create() indicates float.
		break;
		default:
		LOG_ALWAYS_FATAL("Invalid mMixerInFormat: %#x", mMixerInFormat);
		break;
		}
		ALOGVV("Creating resampler with %d bits\n", bits);
		resampler = AudioResampler::create(
		bits,
		// the resampler sees the number of channels after the downmixer, if any
		@@ -848,16 +900,19 @@ void AudioMixer::process__validate(state_t* state, int64_t pts)
		if (n & NEEDS_RESAMPLE) {
		all16BitsStereoNoResample = false;
		resampling = true;
		t.hook = track__genericResample;
		t.hook = getTrackHook(TRACKTYPE_RESAMPLE, FCC_2,
		t.mMixerInFormat, t.mMixerFormat);
		ALOGV_IF((n & NEEDS_CHANNEL_COUNT__MASK) > NEEDS_CHANNEL_2,
		"Track %d needs downmix + resample", i);
		} else {
		if ((n & NEEDS_CHANNEL_COUNT__MASK) == NEEDS_CHANNEL_1){
		t.hook = track__16BitsMono;
		t.hook = getTrackHook(TRACKTYPE_NORESAMPLEMONO, FCC_2,
		t.mMixerInFormat, t.mMixerFormat);
		all16BitsStereoNoResample = false;
		}
		if ((n & NEEDS_CHANNEL_COUNT__MASK) >= NEEDS_CHANNEL_2){
		t.hook = track__16BitsStereo;
		t.hook = getTrackHook(TRACKTYPE_NORESAMPLE, FCC_2,
		t.mMixerInFormat, t.mMixerFormat);
		ALOGV_IF((n & NEEDS_CHANNEL_COUNT__MASK) > NEEDS_CHANNEL_2,
		"Track %d needs downmix", i);
		}
		@@ -888,7 +943,10 @@ void AudioMixer::process__validate(state_t* state, int64_t pts)
		state->hook = process__genericNoResampling;
		if (all16BitsStereoNoResample && !volumeRamp) {
		if (countActiveTracks == 1) {
		state->hook = process__OneTrack16BitsStereoNoResampling;
		const int i = 31 - __builtin_clz(state->enabledTracks);
		track_t& t = state->tracks[i];
		state->hook = getProcessHook(PROCESSTYPE_NORESAMPLEONETRACK, FCC_2,
		t.mMixerInFormat, t.mMixerFormat);
		}
		}
		}
		@@ -931,6 +989,7 @@ void AudioMixer::process__validate(state_t* state, int64_t pts)
		void AudioMixer::track__genericResample(track_t* t, int32_t* out, size_t outFrameCount,
		int32_t* temp, int32_t* aux)
		{
		ALOGVV("track__genericResample\n");
		t->resampler->setSampleRate(t->sampleRate);

		// ramp gain - resample to temp buffer and scale/mix in 2nd step
		@@ -1042,6 +1101,7 @@ void AudioMixer::volumeStereo(track_t* t, int32_t* out, size_t frameCount, int32
		void AudioMixer::track__16BitsStereo(track_t* t, int32_t* out, size_t frameCount,
		int32_t* temp __unused, int32_t* aux)
		{
		ALOGVV("track__16BitsStereo\n");
		const int16_t in = static_cast<const int16_t >(t->in);

		if (CC_UNLIKELY(aux != NULL)) {
		@@ -1133,6 +1193,7 @@ void AudioMixer::track__16BitsStereo(track_t* t, int32_t* out, size_t frameCount
		void AudioMixer::track__16BitsMono(track_t* t, int32_t* out, size_t frameCount,
		int32_t* temp __unused, int32_t* aux)
		{
		ALOGVV("track__16BitsMono\n");
		const int16_t in = static_cast<int16_t const >(t->in);

		if (CC_UNLIKELY(aux != NULL)) {
		@@ -1220,6 +1281,7 @@ void AudioMixer::track__16BitsMono(track_t* t, int32_t* out, size_t frameCount,
		// no-op case
		void AudioMixer::process__nop(state_t* state, int64_t pts)
		{
		ALOGVV("process__nop\n");
		uint32_t e0 = state->enabledTracks;
		size_t sampleCount = state->frameCount * MAX_NUM_CHANNELS;
		while (e0) {
		@@ -1267,6 +1329,7 @@ void AudioMixer::process__nop(state_t* state, int64_t pts)
		// generic code without resampling
		void AudioMixer::process__genericNoResampling(state_t* state, int64_t pts)
		{
		ALOGVV("process__genericNoResampling\n");
		int32_t outTemp[BLOCKSIZE * MAX_NUM_CHANNELS] __attribute__((aligned(32)));

		// acquire each track's buffer
		@@ -1349,18 +1412,12 @@ void AudioMixer::process__genericNoResampling(state_t* state, int64_t pts)
		}
		}
		}
		switch (t1.mMixerFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		memcpy_to_float_from_q4_27(reinterpret_cast<float >(out), outTemp, BLOCKSIZE 2);
		out += BLOCKSIZE * 2; // output is 2 floats/frame.
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		ditherAndClamp(out, outTemp, BLOCKSIZE);
		out += BLOCKSIZE; // output is 1 int32_t (2 int16_t samples)/frame
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixer format: %d", t1.mMixerFormat);
		}

		convertMixerFormat(out, t1.mMixerFormat, outTemp, t1.mMixerInFormat,
		BLOCKSIZE * FCC_2);
		// TODO: fix ugly casting due to choice of out pointer type
		out = reinterpret_cast<int32_t>((uint8_t)out
		+ BLOCKSIZE * FCC_2 * audio_bytes_per_sample(t1.mMixerFormat));
		numFrames += BLOCKSIZE;
		} while (numFrames < state->frameCount);
		}
		@@ -1379,6 +1436,7 @@ void AudioMixer::process__genericNoResampling(state_t* state, int64_t pts)
		// generic code with resampling
		void AudioMixer::process__genericResampling(state_t* state, int64_t pts)
		{
		ALOGVV("process__genericResampling\n");
		// this const just means that local variable outTemp doesn't change
		int32_t* const outTemp = state->outputTemp;
		const size_t size = sizeof(int32_t) * MAX_NUM_CHANNELS * state->frameCount;
		@@ -1442,16 +1500,7 @@ void AudioMixer::process__genericResampling(state_t* state, int64_t pts)
		}
		}
		}
		switch (t1.mMixerFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		memcpy_to_float_from_q4_27(reinterpret_cast<float>(out), outTemp, numFrames2);
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		ditherAndClamp(out, outTemp, numFrames);
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixer format: %d", t1.mMixerFormat);
		}
		convertMixerFormat(out, t1.mMixerFormat, outTemp, t1.mMixerInFormat, numFrames * FCC_2);
		}
		}

		@@ -1459,6 +1508,7 @@ void AudioMixer::process__genericResampling(state_t* state, int64_t pts)
		void AudioMixer::process__OneTrack16BitsStereoNoResampling(state_t* state,
		int64_t pts)
		{
		ALOGVV("process__OneTrack16BitsStereoNoResampling\n");
		// This method is only called when state->enabledTracks has exactly
		// one bit set. The asserts below would verify this, but are commented out
		// since the whole point of this method is to optimize performance.
		@@ -1683,5 +1733,275 @@ int64_t AudioMixer::calculateOutputPTS(const track_t& t, int64_t basePTS,
		ALOGW_IF(!sIsMultichannelCapable, "unable to find downmix effect");
		}

		/* This process hook is called when there is a single track without
		* aux buffer, volume ramp, or resampling.
		* TODO: Update the hook selection: this can properly handle aux and ramp.
		*/
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		void AudioMixer::process_NoResampleOneTrack(state_t* state, int64_t pts)
		{
		ALOGVV("process_NoResampleOneTrack\n");
		// CLZ is faster than CTZ on ARM, though really not sure if true after 31 - clz.
		const int i = 31 - __builtin_clz(state->enabledTracks);
		ALOG_ASSERT((1 << i) == state->enabledTracks, "more than 1 track enabled");
		track_t *t = &state->tracks[i];
		TO* out = reinterpret_cast<TO*>(t->mainBuffer);
		TA* aux = reinterpret_cast<TA*>(t->auxBuffer);
		const bool ramp = t->needsRamp();

		for (size_t numFrames = state->frameCount; numFrames; ) {
		AudioBufferProvider::Buffer& b(t->buffer);
		// get input buffer
		b.frameCount = numFrames;
		const int64_t outputPTS = calculateOutputPTS(*t, pts, state->frameCount - numFrames);
		t->bufferProvider->getNextBuffer(&b, outputPTS);
		const TI in = reinterpret_cast<TI>(b.raw);

		// in == NULL can happen if the track was flushed just after having
		// been enabled for mixing.
		if (in == NULL \|\| (((uintptr_t)in) & 3)) {
		memset(out, 0, numFrames
		* NCHAN * audio_bytes_per_sample(t->mMixerFormat));
		ALOGE_IF((((uintptr_t)in) & 3), "process_NoResampleOneTrack: bus error: "
		"buffer %p track %p, channels %d, needs %#x",
		in, t, t->channelCount, t->needs);
		return;
		}

		const size_t outFrames = b.frameCount;
		if (ramp) {
		volumeRampMulti<MIXTYPE_MULTI_SAVEONLY, NCHAN>(out, outFrames, in, aux,
		t->prevVolume, t->volumeInc, &t->prevAuxLevel, t->auxInc);
		} else {
		volumeMulti<MIXTYPE_MULTI_SAVEONLY, NCHAN>(out, outFrames, in, aux,
		t->volume, t->auxLevel);
		}
		out += outFrames * NCHAN;
		if (aux != NULL) {
		aux += NCHAN;
		}
		numFrames -= b.frameCount;

		// release buffer
		t->bufferProvider->releaseBuffer(&b);
		}
		if (ramp) {
		t->adjustVolumeRamp(aux != NULL);
		}
		}

		/* This track hook is called to do resampling then mixing,
		* pulling from the track's upstream AudioBufferProvider.
		*/
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		void AudioMixer::track__Resample(track_t* t, TO* out, size_t outFrameCount, TO* temp, TA* aux)
		{
		ALOGVV("track__Resample\n");
		t->resampler->setSampleRate(t->sampleRate);

		const bool ramp = t->needsRamp();
		if (ramp \|\| aux != NULL) {
		// if ramp: resample with unity gain to temp buffer and scale/mix in 2nd step.
		// if aux != NULL: resample with unity gain to temp buffer then apply send level.

		t->resampler->setVolume(UNITY_GAIN_INT, UNITY_GAIN_INT);
		memset(temp, 0, outFrameCount * NCHAN * sizeof(TO));
		t->resampler->resample((int32_t*)temp, outFrameCount, t->bufferProvider);
		if (ramp) {
		volumeRampMulti<MIXTYPE_MULTI, NCHAN>(out, outFrameCount, temp, aux,
		t->prevVolume, t->volumeInc, &t->prevAuxLevel, t->auxInc);
		t->adjustVolumeRamp(aux != NULL);
		} else {
		volumeMulti<MIXTYPE_MULTI, NCHAN>(out, outFrameCount, temp, aux,
		t->volume, t->auxLevel);
		}
		} else { // constant volume gain
		t->resampler->setVolume(t->volume[0], t->volume[1]);
		t->resampler->resample((int32_t*)out, outFrameCount, t->bufferProvider);
		}
		}

		/* This track hook is called to mix a track, when no resampling is required.
		* The input buffer should be present in t->in.
		*/
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		void AudioMixer::track__NoResample(track_t* t, TO* out, size_t frameCount,
		TO* temp __unused, TA* aux)
		{
		ALOGVV("track__NoResample\n");
		const TI in = static_cast<const TI >(t->in);

		if (t->needsRamp()) {
		volumeRampMulti<MIXTYPE, NCHAN>(out, frameCount, in, aux,
		t->prevVolume, t->volumeInc, &t->prevAuxLevel, t->auxInc);
		t->adjustVolumeRamp(aux != NULL);
		} else {
		volumeMulti<MIXTYPE, NCHAN>(out, frameCount, in, aux, t->volume, t->auxLevel);
		}
		// MIXTYPE_MONOEXPAND reads a single input channel and expands to NCHAN output channels.
		// MIXTYPE_MULTI reads NCHAN input channels and places to NCHAN output channels.
		in += (MIXTYPE == MIXTYPE_MONOEXPAND) ? frameCount : frameCount * NCHAN;
		t->in = in;
		}

		/* The Mixer engine generates either int32_t (Q4_27) or float data.
		* We use this function to convert the engine buffers
		* to the desired mixer output format, either int16_t (Q.15) or float.
		*/
		void AudioMixer::convertMixerFormat(void *out, audio_format_t mixerOutFormat,
		void *in, audio_format_t mixerInFormat, size_t sampleCount)
		{
		switch (mixerInFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		switch (mixerOutFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		memcpy(out, in, sampleCount * sizeof(float)); // MEMCPY. TODO optimize out
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		memcpy_to_i16_from_float((int16_t)out, (float)in, sampleCount);
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
		break;
		}
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		switch (mixerOutFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		memcpy_to_float_from_q4_27((float)out, (int32_t)in, sampleCount);
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		// two int16_t are produced per iteration
		ditherAndClamp((int32_t)out, (int32_t)in, sampleCount >> 1);
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
		break;
		}
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
		break;
		}
		}

		/* Returns the proper track hook to use for mixing the track into the output buffer.
		*/
		AudioMixer::hook_t AudioMixer::getTrackHook(int trackType, int channels,
		audio_format_t mixerInFormat, audio_format_t mixerOutFormat __unused)
		{
		if (!kUseNewMixer && channels == FCC_2 && mixerInFormat == AUDIO_FORMAT_PCM_16_BIT) {
		switch (trackType) {
		case TRACKTYPE_NOP:
		return track__nop;
		case TRACKTYPE_RESAMPLE:
		return track__genericResample;
		case TRACKTYPE_NORESAMPLEMONO:
		return track__16BitsMono;
		case TRACKTYPE_NORESAMPLE:
		return track__16BitsStereo;
		default:
		LOG_ALWAYS_FATAL("bad trackType: %d", trackType);
		break;
		}
		}
		LOG_ALWAYS_FATAL_IF(channels != FCC_2); // TODO: must be stereo right now
		switch (trackType) {
		case TRACKTYPE_NOP:
		return track__nop;
		case TRACKTYPE_RESAMPLE:
		switch (mixerInFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		return (AudioMixer::hook_t)
		track__Resample<MIXTYPE_MULTI, 2, float, float, int32_t>;
		case AUDIO_FORMAT_PCM_16_BIT:
		return (AudioMixer::hook_t)\
		track__Resample<MIXTYPE_MULTI, 2, int32_t, int16_t, int32_t>;
		default:
		LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
		break;
		}
		break;
		case TRACKTYPE_NORESAMPLEMONO:
		switch (mixerInFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		return (AudioMixer::hook_t)
		track__NoResample<MIXTYPE_MONOEXPAND, 2, float, float, int32_t>;
		case AUDIO_FORMAT_PCM_16_BIT:
		return (AudioMixer::hook_t)
		track__NoResample<MIXTYPE_MONOEXPAND, 2, int32_t, int16_t, int32_t>;
		default:
		LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
		break;
		}
		break;
		case TRACKTYPE_NORESAMPLE:
		switch (mixerInFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		return (AudioMixer::hook_t)
		track__NoResample<MIXTYPE_MULTI, 2, float, float, int32_t>;
		case AUDIO_FORMAT_PCM_16_BIT:
		return (AudioMixer::hook_t)
		track__NoResample<MIXTYPE_MULTI, 2, int32_t, int16_t, int32_t>;
		default:
		LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
		break;
		}
		break;
		default:
		LOG_ALWAYS_FATAL("bad trackType: %d", trackType);
		break;
		}
		return NULL;
		}

		/* Returns the proper process hook for mixing tracks. Currently works only for
		* PROCESSTYPE_NORESAMPLEONETRACK, a mix involving one track, no resampling.
		*/
		AudioMixer::process_hook_t AudioMixer::getProcessHook(int processType, int channels,
		audio_format_t mixerInFormat, audio_format_t mixerOutFormat)
		{
		if (processType != PROCESSTYPE_NORESAMPLEONETRACK) { // Only NORESAMPLEONETRACK
		LOG_ALWAYS_FATAL("bad processType: %d", processType);
		return NULL;
		}
		if (!kUseNewMixer && channels == FCC_2 && mixerInFormat == AUDIO_FORMAT_PCM_16_BIT) {
		return process__OneTrack16BitsStereoNoResampling;
		}
		LOG_ALWAYS_FATAL_IF(channels != FCC_2); // TODO: must be stereo right now
		switch (mixerInFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		switch (mixerOutFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		return process_NoResampleOneTrack<MIXTYPE_MULTI_SAVEONLY, 2,
		float, float, int32_t>;
		case AUDIO_FORMAT_PCM_16_BIT:
		return process_NoResampleOneTrack<MIXTYPE_MULTI_SAVEONLY, 2,
		int16_t, float, int32_t>;
		default:
		LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
		break;
		}
		break;
		case AUDIO_FORMAT_PCM_16_BIT:
		switch (mixerOutFormat) {
		case AUDIO_FORMAT_PCM_FLOAT:
		return process_NoResampleOneTrack<MIXTYPE_MULTI_SAVEONLY, 2,
		float, int16_t, int32_t>;
		case AUDIO_FORMAT_PCM_16_BIT:
		return process_NoResampleOneTrack<MIXTYPE_MULTI_SAVEONLY, 2,
		int16_t, int16_t, int32_t>;
		default:
		LOG_ALWAYS_FATAL("bad mixerOutFormat: %#x", mixerOutFormat);
		break;
		}
		break;
		default:
		LOG_ALWAYS_FATAL("bad mixerInFormat: %#x", mixerInFormat);
		break;
		}
		return NULL;
		}

		// ----------------------------------------------------------------------------
		}; // namespace android

services/audioflinger/AudioMixer.h

+36 −1

Original line number	Diff line number	Diff line
		@@ -221,6 +221,7 @@ private:

		// 16-byte boundary

		bool needsRamp() { return (volumeInc[0] \| volumeInc[1] \| auxInc) != 0; }
		bool setResampler(uint32_t sampleRate, uint32_t devSampleRate);
		bool doesResample() const { return resampler != NULL; }
		void resetResampler() { if (resampler != NULL) resampler->reset(); }
		@@ -229,12 +230,14 @@ private:
		resampler->getUnreleasedFrames() : 0; };
		};

		typedef void (process_hook_t)(state_t state, int64_t pts);

		// pad to 32-bytes to fill cache line
		struct state_t {
		uint32_t enabledTracks;
		uint32_t needsChanged;
		size_t frameCount;
		void (hook)(state_t state, int64_t pts); // one of process__*, never NULL
		process_hook_t hook; // one of process__*, never NULL
		int32_t *outputTemp;
		int32_t *resampleTemp;
		NBLog::Writer* mLog;
		@@ -345,6 +348,38 @@ private:
		static uint64_t sLocalTimeFreq;
		static pthread_once_t sOnceControl;
		static void sInitRoutine();

		// multi-format process hooks
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		static void process_NoResampleOneTrack(state_t* state, int64_t pts);

		// multi-format track hooks
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		static void track__Resample(track_t* t, TO* out, size_t frameCount,
		TO* temp __unused, TA* aux);
		template <int MIXTYPE, int NCHAN, typename TO, typename TI, typename TA>
		static void track__NoResample(track_t* t, TO* out, size_t frameCount,
		TO* temp __unused, TA* aux);

		static void convertMixerFormat(void *out, audio_format_t mixerOutFormat,
		void *in, audio_format_t mixerInFormat, size_t sampleCount);

		// hook types
		enum {
		PROCESSTYPE_NORESAMPLEONETRACK,
		};
		enum {
		TRACKTYPE_NOP,
		TRACKTYPE_RESAMPLE,
		TRACKTYPE_NORESAMPLE,
		TRACKTYPE_NORESAMPLEMONO,
		};

		// functions for determining the proper process and track hooks.
		static process_hook_t getProcessHook(int processType, int channels,
		audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
		static hook_t getTrackHook(int trackType, int channels,
		audio_format_t mixerInFormat, audio_format_t mixerOutFormat);
		};

		// ----------------------------------------------------------------------------

services/audioflinger/AudioMixerOps.h

0 → 100644

+361 −0

File added.

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