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author | Andy Hung <hunga@google.com> | 2015-04-16 20:12:07 +0000 |
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committer | Android (Google) Code Review <android-gerrit@google.com> | 2015-04-16 20:12:07 +0000 |
commit | 71933d769c54dadb5d8618ccb1ae69a3926f890b (patch) | |
tree | 35a881d80da4100792bad920b3d78f25cf9ba9e0 | |
parent | ff9863b206cd5d1e856dbfdf66bc85581aee7608 (diff) | |
parent | 26145643ce22d797b3b1675c82c47a2d8c79ecaa (diff) | |
download | frameworks_av-71933d769c54dadb5d8618ccb1ae69a3926f890b.zip frameworks_av-71933d769c54dadb5d8618ccb1ae69a3926f890b.tar.gz frameworks_av-71933d769c54dadb5d8618ccb1ae69a3926f890b.tar.bz2 |
Merge "Work around lack of pitch adjustment in Timestretcher"
-rw-r--r-- | media/libmedia/AudioTrack.cpp | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp index d32db7c..30d4355 100644 --- a/media/libmedia/AudioTrack.cpp +++ b/media/libmedia/AudioTrack.cpp @@ -56,6 +56,24 @@ static int64_t getNowUs() return convertTimespecToUs(tv); } +// FIXME: we don't use the pitch setting in the time stretcher (not working); +// instead we emulate it using our sample rate converter. +static const bool kFixPitch = true; // enable pitch fix +static inline uint32_t adjustSampleRate(uint32_t sampleRate, float pitch) +{ + return kFixPitch ? (sampleRate * pitch + 0.5) : sampleRate; +} + +static inline float adjustSpeed(float speed, float pitch) +{ + return kFixPitch ? (speed / pitch) : speed; +} + +static inline float adjustPitch(float pitch) +{ + return kFixPitch ? AUDIO_TIMESTRETCH_PITCH_NORMAL : pitch; +} + // Must match similar computation in createTrack_l in Threads.cpp. // TODO: Move to a common library static size_t calculateMinFrameCount( @@ -703,13 +721,15 @@ status_t AudioTrack::setSampleRate(uint32_t rate) if (AudioSystem::getSamplingRate(mOutput, &afSamplingRate) != NO_ERROR) { return NO_INIT; } - if (rate == 0 || rate > afSamplingRate * AUDIO_RESAMPLER_DOWN_RATIO_MAX) { + // pitch is emulated by adjusting speed and sampleRate + const uint32_t effectiveSampleRate = adjustSampleRate(rate, mPitch); + if (rate == 0 || effectiveSampleRate > afSamplingRate * AUDIO_RESAMPLER_DOWN_RATIO_MAX) { return BAD_VALUE; } // TODO: Should we also check if the buffer size is compatible? mSampleRate = rate; - mProxy->setSampleRate(rate); + mProxy->setSampleRate(effectiveSampleRate); return NO_ERROR; } @@ -739,12 +759,6 @@ uint32_t AudioTrack::getSampleRate() const status_t AudioTrack::setPlaybackRate(float speed, float pitch) { - if (speed < AUDIO_TIMESTRETCH_SPEED_MIN - || speed > AUDIO_TIMESTRETCH_SPEED_MAX - || pitch < AUDIO_TIMESTRETCH_PITCH_MIN - || pitch > AUDIO_TIMESTRETCH_PITCH_MAX) { - return BAD_VALUE; - } AutoMutex lock(mLock); if (speed == mSpeed && pitch == mPitch) { return NO_ERROR; @@ -755,14 +769,25 @@ status_t AudioTrack::setPlaybackRate(float speed, float pitch) if (mFlags & AUDIO_OUTPUT_FLAG_FAST) { return INVALID_OPERATION; } + // pitch is emulated by adjusting speed and sampleRate + const uint32_t effectiveRate = adjustSampleRate(mSampleRate, pitch); + const float effectiveSpeed = adjustSpeed(speed, pitch); + const float effectivePitch = adjustPitch(pitch); + if (effectiveSpeed < AUDIO_TIMESTRETCH_SPEED_MIN + || effectiveSpeed > AUDIO_TIMESTRETCH_SPEED_MAX + || effectivePitch < AUDIO_TIMESTRETCH_PITCH_MIN + || effectivePitch > AUDIO_TIMESTRETCH_PITCH_MAX) { + return BAD_VALUE; + } // Check if the buffer size is compatible. - if (!isSampleRateSpeedAllowed_l(mSampleRate, speed)) { + if (!isSampleRateSpeedAllowed_l(effectiveRate, effectiveSpeed)) { ALOGV("setPlaybackRate(%f, %f) failed", speed, pitch); return BAD_VALUE; } mSpeed = speed; mPitch = pitch; - mProxy->setPlaybackRate(speed, pitch); + mProxy->setPlaybackRate(effectiveSpeed, effectivePitch); + mProxy->setSampleRate(effectiveRate); // FIXME: not quite "atomic" with setPlaybackRate return NO_ERROR; } @@ -1317,8 +1342,11 @@ status_t AudioTrack::createTrack_l() gain_from_float(mVolume[AUDIO_INTERLEAVE_RIGHT]))); mProxy->setSendLevel(mSendLevel); - mProxy->setSampleRate(mSampleRate); - mProxy->setPlaybackRate(mSpeed, mPitch); + const uint32_t effectiveSampleRate = adjustSampleRate(mSampleRate, mPitch); + const float effectiveSpeed = adjustSpeed(mSpeed, mPitch); + const float effectivePitch = adjustPitch(mPitch); + mProxy->setSampleRate(effectiveSampleRate); + mProxy->setPlaybackRate(effectiveSpeed, effectivePitch); mProxy->setMinimum(mNotificationFramesAct); mDeathNotifier = new DeathNotifier(this); |