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-rw-r--r--media/libmedia/AudioTrack.cpp1011
1 files changed, 0 insertions, 1011 deletions
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
deleted file mode 100644
index f8520a7..0000000
--- a/media/libmedia/AudioTrack.cpp
+++ /dev/null
@@ -1,1011 +0,0 @@
-/* //device/extlibs/pv/android/AudioTrack.cpp
-**
-** Copyright 2007, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-** http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-
-//#define LOG_NDEBUG 0
-#define LOG_TAG "AudioTrack"
-
-#include <stdint.h>
-#include <sys/types.h>
-#include <limits.h>
-
-#include <sched.h>
-#include <sys/resource.h>
-
-#include <private/media/AudioTrackShared.h>
-
-#include <media/AudioSystem.h>
-#include <media/AudioTrack.h>
-
-#include <utils/Log.h>
-#include <utils/MemoryDealer.h>
-#include <utils/Parcel.h>
-#include <utils/IPCThreadState.h>
-#include <utils/Timers.h>
-#include <cutils/atomic.h>
-
-#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
-#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
-
-namespace android {
-
-// ---------------------------------------------------------------------------
-
-AudioTrack::AudioTrack()
- : mStatus(NO_INIT)
-{
-}
-
-AudioTrack::AudioTrack(
- int streamType,
- uint32_t sampleRate,
- int format,
- int channelCount,
- int frameCount,
- uint32_t flags,
- callback_t cbf,
- void* user,
- int notificationFrames)
- : mStatus(NO_INIT)
-{
- mStatus = set(streamType, sampleRate, format, channelCount,
- frameCount, flags, cbf, user, notificationFrames, 0);
-}
-
-AudioTrack::AudioTrack(
- int streamType,
- uint32_t sampleRate,
- int format,
- int channelCount,
- const sp<IMemory>& sharedBuffer,
- uint32_t flags,
- callback_t cbf,
- void* user,
- int notificationFrames)
- : mStatus(NO_INIT)
-{
- mStatus = set(streamType, sampleRate, format, channelCount,
- 0, flags, cbf, user, notificationFrames, sharedBuffer);
-}
-
-AudioTrack::~AudioTrack()
-{
- LOGV_IF(mSharedBuffer != 0, "Destructor sharedBuffer: %p", mSharedBuffer->pointer());
-
- if (mStatus == NO_ERROR) {
- // Make sure that callback function exits in the case where
- // it is looping on buffer full condition in obtainBuffer().
- // Otherwise the callback thread will never exit.
- stop();
- if (mAudioTrackThread != 0) {
- mCblk->cv.signal();
- mAudioTrackThread->requestExitAndWait();
- mAudioTrackThread.clear();
- }
- mAudioTrack.clear();
- IPCThreadState::self()->flushCommands();
- }
-}
-
-status_t AudioTrack::set(
- int streamType,
- uint32_t sampleRate,
- int format,
- int channelCount,
- int frameCount,
- uint32_t flags,
- callback_t cbf,
- void* user,
- int notificationFrames,
- const sp<IMemory>& sharedBuffer,
- bool threadCanCallJava)
-{
-
- LOGV_IF(sharedBuffer != 0, "sharedBuffer: %p, size: %d", sharedBuffer->pointer(), sharedBuffer->size());
-
- if (mAudioFlinger != 0) {
- LOGE("Track already in use");
- return INVALID_OPERATION;
- }
-
- const sp<IAudioFlinger>& audioFlinger = AudioSystem::get_audio_flinger();
- if (audioFlinger == 0) {
- LOGE("Could not get audioflinger");
- return NO_INIT;
- }
- int afSampleRate;
- if (AudioSystem::getOutputSamplingRate(&afSampleRate, streamType) != NO_ERROR) {
- return NO_INIT;
- }
- int afFrameCount;
- if (AudioSystem::getOutputFrameCount(&afFrameCount, streamType) != NO_ERROR) {
- return NO_INIT;
- }
- uint32_t afLatency;
- if (AudioSystem::getOutputLatency(&afLatency, streamType) != NO_ERROR) {
- return NO_INIT;
- }
-
- // handle default values first.
- if (streamType == AudioSystem::DEFAULT) {
- streamType = AudioSystem::MUSIC;
- }
- if (sampleRate == 0) {
- sampleRate = afSampleRate;
- }
- // these below should probably come from the audioFlinger too...
- if (format == 0) {
- format = AudioSystem::PCM_16_BIT;
- }
- if (channelCount == 0) {
- channelCount = 2;
- }
-
- // validate parameters
- if (((format != AudioSystem::PCM_8_BIT) || sharedBuffer != 0) &&
- (format != AudioSystem::PCM_16_BIT)) {
- LOGE("Invalid format");
- return BAD_VALUE;
- }
- if (channelCount != 1 && channelCount != 2) {
- LOGE("Invalid channel number");
- return BAD_VALUE;
- }
-
- // Ensure that buffer depth covers at least audio hardware latency
- uint32_t minBufCount = afLatency / ((1000 * afFrameCount)/afSampleRate);
- // When playing from shared buffer, playback will start even if last audioflinger
- // block is partly filled.
- if (sharedBuffer != 0 && minBufCount > 1) {
- minBufCount--;
- }
-
- int minFrameCount = (afFrameCount*sampleRate*minBufCount)/afSampleRate;
-
- if (sharedBuffer == 0) {
- if (frameCount == 0) {
- frameCount = minFrameCount;
- }
- if (notificationFrames == 0) {
- notificationFrames = frameCount/2;
- }
- // Make sure that application is notified with sufficient margin
- // before underrun
- if (notificationFrames > frameCount/2) {
- notificationFrames = frameCount/2;
- }
- } else {
- // Ensure that buffer alignment matches channelcount
- if (((uint32_t)sharedBuffer->pointer() & (channelCount | 1)) != 0) {
- LOGE("Invalid buffer alignement: address %p, channelCount %d", sharedBuffer->pointer(), channelCount);
- return BAD_VALUE;
- }
- frameCount = sharedBuffer->size()/channelCount/sizeof(int16_t);
- }
-
- if (frameCount < minFrameCount) {
- LOGE("Invalid buffer size: minFrameCount %d, frameCount %d", minFrameCount, frameCount);
- return BAD_VALUE;
- }
-
- // create the track
- status_t status;
- sp<IAudioTrack> track = audioFlinger->createTrack(getpid(),
- streamType, sampleRate, format, channelCount, frameCount, flags, sharedBuffer, &status);
-
- if (track == 0) {
- LOGE("AudioFlinger could not create track, status: %d", status);
- return status;
- }
- sp<IMemory> cblk = track->getCblk();
- if (cblk == 0) {
- LOGE("Could not get control block");
- return NO_INIT;
- }
- if (cbf != 0) {
- mAudioTrackThread = new AudioTrackThread(*this, threadCanCallJava);
- if (mAudioTrackThread == 0) {
- LOGE("Could not create callback thread");
- return NO_INIT;
- }
- }
-
- mStatus = NO_ERROR;
-
- mAudioFlinger = audioFlinger;
- mAudioTrack = track;
- mCblkMemory = cblk;
- mCblk = static_cast<audio_track_cblk_t*>(cblk->pointer());
- mCblk->out = 1;
- // Update buffer size in case it has been limited by AudioFlinger during track creation
- mFrameCount = mCblk->frameCount;
- if (sharedBuffer == 0) {
- mCblk->buffers = (char*)mCblk + sizeof(audio_track_cblk_t);
- } else {
- mCblk->buffers = sharedBuffer->pointer();
- // Force buffer full condition as data is already present in shared memory
- mCblk->stepUser(mFrameCount);
- }
- mCblk->volume[0] = mCblk->volume[1] = 0x1000;
- mVolume[LEFT] = 1.0f;
- mVolume[RIGHT] = 1.0f;
- mSampleRate = sampleRate;
- mStreamType = streamType;
- mFormat = format;
- mChannelCount = channelCount;
- mSharedBuffer = sharedBuffer;
- mMuted = false;
- mActive = 0;
- mCbf = cbf;
- mNotificationFrames = notificationFrames;
- mRemainingFrames = notificationFrames;
- mUserData = user;
- mLatency = afLatency + (1000*mFrameCount) / mSampleRate;
- mLoopCount = 0;
- mMarkerPosition = 0;
- mNewPosition = 0;
- mUpdatePeriod = 0;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::initCheck() const
-{
- return mStatus;
-}
-
-// -------------------------------------------------------------------------
-
-uint32_t AudioTrack::latency() const
-{
- return mLatency;
-}
-
-int AudioTrack::streamType() const
-{
- return mStreamType;
-}
-
-uint32_t AudioTrack::sampleRate() const
-{
- return mSampleRate;
-}
-
-int AudioTrack::format() const
-{
- return mFormat;
-}
-
-int AudioTrack::channelCount() const
-{
- return mChannelCount;
-}
-
-uint32_t AudioTrack::frameCount() const
-{
- return mFrameCount;
-}
-
-int AudioTrack::frameSize() const
-{
- return channelCount()*((format() == AudioSystem::PCM_8_BIT) ? sizeof(uint8_t) : sizeof(int16_t));
-}
-
-sp<IMemory>& AudioTrack::sharedBuffer()
-{
- return mSharedBuffer;
-}
-
-// -------------------------------------------------------------------------
-
-void AudioTrack::start()
-{
- sp<AudioTrackThread> t = mAudioTrackThread;
-
- LOGV("start");
- if (t != 0) {
- if (t->exitPending()) {
- if (t->requestExitAndWait() == WOULD_BLOCK) {
- LOGE("AudioTrack::start called from thread");
- return;
- }
- }
- t->mLock.lock();
- }
-
- if (android_atomic_or(1, &mActive) == 0) {
- mNewPosition = mCblk->server + mUpdatePeriod;
- mCblk->bufferTimeoutMs = MAX_STARTUP_TIMEOUT_MS;
- mCblk->waitTimeMs = 0;
- if (t != 0) {
- t->run("AudioTrackThread", THREAD_PRIORITY_AUDIO_CLIENT);
- } else {
- setpriority(PRIO_PROCESS, 0, THREAD_PRIORITY_AUDIO_CLIENT);
- }
- mAudioTrack->start();
- }
-
- if (t != 0) {
- t->mLock.unlock();
- }
-}
-
-void AudioTrack::stop()
-{
- sp<AudioTrackThread> t = mAudioTrackThread;
-
- LOGV("stop");
- if (t != 0) {
- t->mLock.lock();
- }
-
- if (android_atomic_and(~1, &mActive) == 1) {
- mAudioTrack->stop();
- // Cancel loops (If we are in the middle of a loop, playback
- // would not stop until loopCount reaches 0).
- setLoop(0, 0, 0);
- // Force flush if a shared buffer is used otherwise audioflinger
- // will not stop before end of buffer is reached.
- if (mSharedBuffer != 0) {
- flush();
- }
- if (t != 0) {
- t->requestExit();
- } else {
- setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_NORMAL);
- }
- }
-
- if (t != 0) {
- t->mLock.unlock();
- }
-}
-
-bool AudioTrack::stopped() const
-{
- return !mActive;
-}
-
-void AudioTrack::flush()
-{
- LOGV("flush");
-
- if (!mActive) {
- mCblk->lock.lock();
- mAudioTrack->flush();
- // Release AudioTrack callback thread in case it was waiting for new buffers
- // in AudioTrack::obtainBuffer()
- mCblk->cv.signal();
- mCblk->lock.unlock();
- }
-}
-
-void AudioTrack::pause()
-{
- LOGV("pause");
- if (android_atomic_and(~1, &mActive) == 1) {
- mActive = 0;
- mAudioTrack->pause();
- }
-}
-
-void AudioTrack::mute(bool e)
-{
- mAudioTrack->mute(e);
- mMuted = e;
-}
-
-bool AudioTrack::muted() const
-{
- return mMuted;
-}
-
-void AudioTrack::setVolume(float left, float right)
-{
- mVolume[LEFT] = left;
- mVolume[RIGHT] = right;
-
- // write must be atomic
- mCblk->volumeLR = (int32_t(int16_t(left * 0x1000)) << 16) | int16_t(right * 0x1000);
-}
-
-void AudioTrack::getVolume(float* left, float* right)
-{
- *left = mVolume[LEFT];
- *right = mVolume[RIGHT];
-}
-
-void AudioTrack::setSampleRate(int rate)
-{
- int afSamplingRate;
-
- if (AudioSystem::getOutputSamplingRate(&afSamplingRate, mStreamType) != NO_ERROR) {
- return;
- }
- // Resampler implementation limits input sampling rate to 2 x output sampling rate.
- if (rate > afSamplingRate*2) rate = afSamplingRate*2;
-
- if (rate > MAX_SAMPLE_RATE) rate = MAX_SAMPLE_RATE;
-
- mCblk->sampleRate = rate;
-}
-
-uint32_t AudioTrack::getSampleRate()
-{
- return uint32_t(mCblk->sampleRate);
-}
-
-status_t AudioTrack::setLoop(uint32_t loopStart, uint32_t loopEnd, int loopCount)
-{
- audio_track_cblk_t* cblk = mCblk;
-
-
- Mutex::Autolock _l(cblk->lock);
-
- if (loopCount == 0) {
- cblk->loopStart = UINT_MAX;
- cblk->loopEnd = UINT_MAX;
- cblk->loopCount = 0;
- mLoopCount = 0;
- return NO_ERROR;
- }
-
- if (loopStart >= loopEnd ||
- loopEnd - loopStart > mFrameCount) {
- LOGW("setLoop invalid value: loopStart %d, loopEnd %d, loopCount %d, framecount %d, user %d", loopStart, loopEnd, loopCount, mFrameCount, cblk->user);
- return BAD_VALUE;
- }
- // TODO handle shared buffer here: limit loop end to framecount
-
- cblk->loopStart = loopStart;
- cblk->loopEnd = loopEnd;
- cblk->loopCount = loopCount;
- mLoopCount = loopCount;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::getLoop(uint32_t *loopStart, uint32_t *loopEnd, int *loopCount)
-{
- if (loopStart != 0) {
- *loopStart = mCblk->loopStart;
- }
- if (loopEnd != 0) {
- *loopEnd = mCblk->loopEnd;
- }
- if (loopCount != 0) {
- if (mCblk->loopCount < 0) {
- *loopCount = -1;
- } else {
- *loopCount = mCblk->loopCount;
- }
- }
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::setMarkerPosition(uint32_t marker)
-{
- if (mCbf == 0) return INVALID_OPERATION;
-
- mMarkerPosition = marker;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::getMarkerPosition(uint32_t *marker)
-{
- if (marker == 0) return BAD_VALUE;
-
- *marker = mMarkerPosition;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::setPositionUpdatePeriod(uint32_t updatePeriod)
-{
- if (mCbf == 0) return INVALID_OPERATION;
-
- uint32_t curPosition;
- getPosition(&curPosition);
- mNewPosition = curPosition + updatePeriod;
- mUpdatePeriod = updatePeriod;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::getPositionUpdatePeriod(uint32_t *updatePeriod)
-{
- if (updatePeriod == 0) return BAD_VALUE;
-
- *updatePeriod = mUpdatePeriod;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::setPosition(uint32_t position)
-{
- Mutex::Autolock _l(mCblk->lock);
-
- if (!stopped()) return INVALID_OPERATION;
-
- if (position > mCblk->user) return BAD_VALUE;
-
- mCblk->server = position;
- mCblk->forceReady = 1;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::getPosition(uint32_t *position)
-{
- if (position == 0) return BAD_VALUE;
-
- *position = mCblk->server;
-
- return NO_ERROR;
-}
-
-status_t AudioTrack::reload()
-{
- if (!stopped()) return INVALID_OPERATION;
-
- flush();
-
- mCblk->stepUser(mFrameCount);
-
- return NO_ERROR;
-}
-
-// -------------------------------------------------------------------------
-
-status_t AudioTrack::obtainBuffer(Buffer* audioBuffer, int32_t waitCount)
-{
- int active;
- int timeout = 0;
- status_t result;
- audio_track_cblk_t* cblk = mCblk;
- uint32_t framesReq = audioBuffer->frameCount;
-
- audioBuffer->frameCount = 0;
- audioBuffer->size = 0;
-
- uint32_t framesAvail = cblk->framesAvailable();
-
- if (framesAvail == 0) {
- Mutex::Autolock _l(cblk->lock);
- goto start_loop_here;
- while (framesAvail == 0) {
- active = mActive;
- if (UNLIKELY(!active)) {
- LOGV("Not active and NO_MORE_BUFFERS");
- return NO_MORE_BUFFERS;
- }
- if (UNLIKELY(!waitCount))
- return WOULD_BLOCK;
- timeout = 0;
- result = cblk->cv.waitRelative(cblk->lock, milliseconds(WAIT_PERIOD_MS));
- if (__builtin_expect(result!=NO_ERROR, false)) {
- cblk->waitTimeMs += WAIT_PERIOD_MS;
- if (cblk->waitTimeMs >= cblk->bufferTimeoutMs) {
- // timing out when a loop has been set and we have already written upto loop end
- // is a normal condition: no need to wake AudioFlinger up.
- if (cblk->user < cblk->loopEnd) {
- LOGW( "obtainBuffer timed out (is the CPU pegged?) "
- "user=%08x, server=%08x", cblk->user, cblk->server);
- mAudioFlinger->wakeUp();
- timeout = 1;
- }
- cblk->waitTimeMs = 0;
- }
-
- if (--waitCount == 0) {
- return TIMED_OUT;
- }
- }
- // read the server count again
- start_loop_here:
- framesAvail = cblk->framesAvailable_l();
- }
- }
-
- cblk->waitTimeMs = 0;
-
- if (framesReq > framesAvail) {
- framesReq = framesAvail;
- }
-
- uint32_t u = cblk->user;
- uint32_t bufferEnd = cblk->userBase + cblk->frameCount;
-
- if (u + framesReq > bufferEnd) {
- framesReq = bufferEnd - u;
- }
-
- LOGW_IF(timeout,
- "*** SERIOUS WARNING *** obtainBuffer() timed out "
- "but didn't need to be locked. We recovered, but "
- "this shouldn't happen (user=%08x, server=%08x)", cblk->user, cblk->server);
-
- audioBuffer->flags = mMuted ? Buffer::MUTE : 0;
- audioBuffer->channelCount= mChannelCount;
- audioBuffer->format = AudioSystem::PCM_16_BIT;
- audioBuffer->frameCount = framesReq;
- audioBuffer->size = framesReq*mChannelCount*sizeof(int16_t);
- audioBuffer->raw = (int8_t *)cblk->buffer(u);
- active = mActive;
- return active ? status_t(NO_ERROR) : status_t(STOPPED);
-}
-
-void AudioTrack::releaseBuffer(Buffer* audioBuffer)
-{
- audio_track_cblk_t* cblk = mCblk;
- cblk->stepUser(audioBuffer->frameCount);
-}
-
-// -------------------------------------------------------------------------
-
-ssize_t AudioTrack::write(const void* buffer, size_t userSize)
-{
-
- if (mSharedBuffer != 0) return INVALID_OPERATION;
-
- if (ssize_t(userSize) < 0) {
- // sanity-check. user is most-likely passing an error code.
- LOGE("AudioTrack::write(buffer=%p, size=%u (%d)",
- buffer, userSize, userSize);
- return BAD_VALUE;
- }
-
- LOGV("write %d bytes, mActive=%d", userSize, mActive);
-
- ssize_t written = 0;
- const int8_t *src = (const int8_t *)buffer;
- Buffer audioBuffer;
-
- do {
- audioBuffer.frameCount = userSize/mChannelCount;
- if (mFormat == AudioSystem::PCM_16_BIT) {
- audioBuffer.frameCount >>= 1;
- }
- // Calling obtainBuffer() with a negative wait count causes
- // an (almost) infinite wait time.
- status_t err = obtainBuffer(&audioBuffer, -1);
- if (err < 0) {
- // out of buffers, return #bytes written
- if (err == status_t(NO_MORE_BUFFERS))
- break;
- return ssize_t(err);
- }
-
- size_t toWrite;
- if (mFormat == AudioSystem::PCM_8_BIT) {
- // Divide capacity by 2 to take expansion into account
- toWrite = audioBuffer.size>>1;
- // 8 to 16 bit conversion
- int count = toWrite;
- int16_t *dst = (int16_t *)(audioBuffer.i8);
- while(count--) {
- *dst++ = (int16_t)(*src++^0x80) << 8;
- }
- }else {
- toWrite = audioBuffer.size;
- memcpy(audioBuffer.i8, src, toWrite);
- src += toWrite;
- }
- userSize -= toWrite;
- written += toWrite;
-
- releaseBuffer(&audioBuffer);
- } while (userSize);
-
- return written;
-}
-
-// -------------------------------------------------------------------------
-
-bool AudioTrack::processAudioBuffer(const sp<AudioTrackThread>& thread)
-{
- Buffer audioBuffer;
- uint32_t frames;
- size_t writtenSize;
-
- // Manage underrun callback
- if (mActive && (mCblk->framesReady() == 0)) {
- LOGV("Underrun user: %x, server: %x, flowControlFlag %d", mCblk->user, mCblk->server, mCblk->flowControlFlag);
- if (mCblk->flowControlFlag == 0) {
- mCbf(EVENT_UNDERRUN, mUserData, 0);
- if (mCblk->server == mCblk->frameCount) {
- mCbf(EVENT_BUFFER_END, mUserData, 0);
- }
- mCblk->flowControlFlag = 1;
- if (mSharedBuffer != 0) return false;
- }
- }
-
- // Manage loop end callback
- while (mLoopCount > mCblk->loopCount) {
- int loopCount = -1;
- mLoopCount--;
- if (mLoopCount >= 0) loopCount = mLoopCount;
-
- mCbf(EVENT_LOOP_END, mUserData, (void *)&loopCount);
- }
-
- // Manage marker callback
- if(mMarkerPosition > 0) {
- if (mCblk->server >= mMarkerPosition) {
- mCbf(EVENT_MARKER, mUserData, (void *)&mMarkerPosition);
- mMarkerPosition = 0;
- }
- }
-
- // Manage new position callback
- if(mUpdatePeriod > 0) {
- while (mCblk->server >= mNewPosition) {
- mCbf(EVENT_NEW_POS, mUserData, (void *)&mNewPosition);
- mNewPosition += mUpdatePeriod;
- }
- }
-
- // If Shared buffer is used, no data is requested from client.
- if (mSharedBuffer != 0) {
- frames = 0;
- } else {
- frames = mRemainingFrames;
- }
-
- do {
-
- audioBuffer.frameCount = frames;
-
- // Calling obtainBuffer() with a wait count of 1
- // limits wait time to WAIT_PERIOD_MS. This prevents from being
- // stuck here not being able to handle timed events (position, markers, loops).
- status_t err = obtainBuffer(&audioBuffer, 1);
- if (err < NO_ERROR) {
- if (err != TIMED_OUT) {
- LOGE("Error obtaining an audio buffer, giving up.");
- return false;
- }
- break;
- }
- if (err == status_t(STOPPED)) return false;
-
- // Divide buffer size by 2 to take into account the expansion
- // due to 8 to 16 bit conversion: the callback must fill only half
- // of the destination buffer
- if (mFormat == AudioSystem::PCM_8_BIT) {
- audioBuffer.size >>= 1;
- }
-
- size_t reqSize = audioBuffer.size;
- mCbf(EVENT_MORE_DATA, mUserData, &audioBuffer);
- writtenSize = audioBuffer.size;
-
- // Sanity check on returned size
- if (ssize_t(writtenSize) <= 0) break;
- if (writtenSize > reqSize) writtenSize = reqSize;
-
- if (mFormat == AudioSystem::PCM_8_BIT) {
- // 8 to 16 bit conversion
- const int8_t *src = audioBuffer.i8 + writtenSize-1;
- int count = writtenSize;
- int16_t *dst = audioBuffer.i16 + writtenSize-1;
- while(count--) {
- *dst-- = (int16_t)(*src--^0x80) << 8;
- }
- writtenSize <<= 1;
- }
-
- audioBuffer.size = writtenSize;
- audioBuffer.frameCount = writtenSize/mChannelCount/sizeof(int16_t);
- frames -= audioBuffer.frameCount;
-
- releaseBuffer(&audioBuffer);
- }
- while (frames);
-
- if (frames == 0) {
- mRemainingFrames = mNotificationFrames;
- } else {
- mRemainingFrames = frames;
- }
- return true;
-}
-
-status_t AudioTrack::dump(int fd, const Vector<String16>& args) const
-{
-
- const size_t SIZE = 256;
- char buffer[SIZE];
- String8 result;
-
- result.append(" AudioTrack::dump\n");
- snprintf(buffer, 255, " stream type(%d), left - right volume(%f, %f)\n", mStreamType, mVolume[0], mVolume[1]);
- result.append(buffer);
- snprintf(buffer, 255, " format(%d), channel count(%d), frame count(%d)\n", mFormat, mChannelCount, mFrameCount);
- result.append(buffer);
- snprintf(buffer, 255, " sample rate(%d), status(%d), muted(%d)\n", mSampleRate, mStatus, mMuted);
- result.append(buffer);
- snprintf(buffer, 255, " active(%d), latency (%d)\n", mActive, mLatency);
- result.append(buffer);
- ::write(fd, result.string(), result.size());
- return NO_ERROR;
-}
-
-// =========================================================================
-
-AudioTrack::AudioTrackThread::AudioTrackThread(AudioTrack& receiver, bool bCanCallJava)
- : Thread(bCanCallJava), mReceiver(receiver)
-{
-}
-
-bool AudioTrack::AudioTrackThread::threadLoop()
-{
- return mReceiver.processAudioBuffer(this);
-}
-
-status_t AudioTrack::AudioTrackThread::readyToRun()
-{
- return NO_ERROR;
-}
-
-void AudioTrack::AudioTrackThread::onFirstRef()
-{
-}
-
-// =========================================================================
-
-audio_track_cblk_t::audio_track_cblk_t()
- : user(0), server(0), userBase(0), serverBase(0), buffers(0), frameCount(0),
- loopStart(UINT_MAX), loopEnd(UINT_MAX), loopCount(0), volumeLR(0), flowControlFlag(1), forceReady(0)
-{
-}
-
-uint32_t audio_track_cblk_t::stepUser(uint32_t frameCount)
-{
- uint32_t u = this->user;
-
- u += frameCount;
- // Ensure that user is never ahead of server for AudioRecord
- if (out) {
- // If stepServer() has been called once, switch to normal obtainBuffer() timeout period
- if (bufferTimeoutMs == MAX_STARTUP_TIMEOUT_MS-1) {
- bufferTimeoutMs = MAX_RUN_TIMEOUT_MS;
- }
- } else if (u > this->server) {
- LOGW("stepServer occured after track reset");
- u = this->server;
- }
-
- if (u >= userBase + this->frameCount) {
- userBase += this->frameCount;
- }
-
- this->user = u;
-
- // Clear flow control error condition as new data has been written/read to/from buffer.
- flowControlFlag = 0;
-
- return u;
-}
-
-bool audio_track_cblk_t::stepServer(uint32_t frameCount)
-{
- // the code below simulates lock-with-timeout
- // we MUST do this to protect the AudioFlinger server
- // as this lock is shared with the client.
- status_t err;
-
- err = lock.tryLock();
- if (err == -EBUSY) { // just wait a bit
- usleep(1000);
- err = lock.tryLock();
- }
- if (err != NO_ERROR) {
- // probably, the client just died.
- return false;
- }
-
- uint32_t s = this->server;
-
- s += frameCount;
- if (out) {
- // Mark that we have read the first buffer so that next time stepUser() is called
- // we switch to normal obtainBuffer() timeout period
- if (bufferTimeoutMs == MAX_STARTUP_TIMEOUT_MS) {
- bufferTimeoutMs = MAX_RUN_TIMEOUT_MS - 1;
- }
- // It is possible that we receive a flush()
- // while the mixer is processing a block: in this case,
- // stepServer() is called After the flush() has reset u & s and
- // we have s > u
- if (s > this->user) {
- LOGW("stepServer occured after track reset");
- s = this->user;
- }
- }
-
- if (s >= loopEnd) {
- LOGW_IF(s > loopEnd, "stepServer: s %u > loopEnd %u", s, loopEnd);
- s = loopStart;
- if (--loopCount == 0) {
- loopEnd = UINT_MAX;
- loopStart = UINT_MAX;
- }
- }
- if (s >= serverBase + this->frameCount) {
- serverBase += this->frameCount;
- }
-
- this->server = s;
-
- cv.signal();
- lock.unlock();
- return true;
-}
-
-void* audio_track_cblk_t::buffer(uint32_t offset) const
-{
- return (int16_t *)this->buffers + (offset-userBase)*this->channels;
-}
-
-uint32_t audio_track_cblk_t::framesAvailable()
-{
- Mutex::Autolock _l(lock);
- return framesAvailable_l();
-}
-
-uint32_t audio_track_cblk_t::framesAvailable_l()
-{
- uint32_t u = this->user;
- uint32_t s = this->server;
-
- if (out) {
- uint32_t limit = (s < loopStart) ? s : loopStart;
- return limit + frameCount - u;
- } else {
- return frameCount + u - s;
- }
-}
-
-uint32_t audio_track_cblk_t::framesReady()
-{
- uint32_t u = this->user;
- uint32_t s = this->server;
-
- if (out) {
- if (u < loopEnd) {
- return u - s;
- } else {
- Mutex::Autolock _l(lock);
- if (loopCount >= 0) {
- return (loopEnd - loopStart)*loopCount + u - s;
- } else {
- return UINT_MAX;
- }
- }
- } else {
- return s - u;
- }
-}
-
-// -------------------------------------------------------------------------
-
-}; // namespace android
-
generated by cgit v1.1 at 2025-01-26 12:20:53 +0000