@ -1,133 +1,101 @@
package com.otaliastudios.cameraview.video.encoding ;
import android.annotation.SuppressLint ;
import android.media.AudioFormat ;
import android.media.AudioRecord ;
import android.media.AudioTimestamp ;
import android.media.MediaCodec ;
import android.media.MediaCodecInfo ;
import android.media.MediaFormat ;
import android.media.MediaRecorder ;
import android.os.Build ;
import android.os.Handler ;
import android.os.Message ;
import com.otaliastudios.cameraview.CameraLogger ;
import com.otaliastudios.cameraview.internal.utils.WorkerHandler ;
import androidx.annotation.NonNull ;
import androidx.annotation.Nullable ;
import androidx.annotation.RequiresApi ;
import java.io.IOException ;
import java.nio.ByteBuffer ;
import java.util.HashMap ;
import java.util.Map ;
import java.util.concurrent.LinkedBlockingQueue ;
/ * *
* Default implementation for audio encoding .
* /
// TODO create onVideoRecordingStart/onVideoRecordingEnd callbacks
@RequiresApi ( api = Build . VERSION_CODES . JELLY_BEAN_MR2 )
public class AudioMediaEncoder extends MediaEncoder {
private static final String TAG = AudioMediaEncoder . class . getSimpleName ( ) ;
private static final CameraLogger LOG = CameraLogger . create ( TAG ) ;
private static final String MIME_TYPE = "audio/mp4a-latm" ;
private static final int ENCODING = AudioFormat . ENCODING_PCM_16BIT ; // Determines the SAMPLE_SIZE
private static final int CHANNELS = AudioFormat . CHANNEL_IN_MONO ; // AudioFormat.CHANNEL_IN_STEREO;
// The 44.1KHz frequency is the only setting guaranteed to be available on all devices.
private static final int SAMPLING_FREQUENCY = 44100 ; // samples/sec
private static final int CHANNELS_COUNT = 1 ; // 2;
private static final int SAMPLE_SIZE = 2 ; // byte/sample/channel
private static final int BYTE_RATE_PER_CHANNEL = SAMPLING_FREQUENCY * SAMPLE_SIZE ; // byte/sec/channel
private static final int BYTE_RATE = BYTE_RATE_PER_CHANNEL * CHANNELS_COUNT ; // byte/sec
@SuppressWarnings ( "unused" )
private static final int BIT_RATE = BYTE_RATE * 8 ; // bit/sec
// We call FRAME here the chunk of data that we want to read at each loop cycle
private static final int FRAME_SIZE_PER_CHANNEL = 1024 ; // bytes/frame/channel [AAC constant]
private static final int FRAME_SIZE = FRAME_SIZE_PER_CHANNEL * CHANNELS_COUNT ; // bytes/frame
// We allocate buffers of 1KB each, which is not so much. This value indicates the maximum
// number of these buffers that we can allocate at a given instant.
// This value is the number of runnables that the encoder thread is allowed to be 'behind'
// the recorder thread. It's not safe to have it very large or we can end encoding A LOT AFTER
// the actual recording. It's better to reduce this and skip recording at all.
private static final int BUFFER_POOL_MAX_SIZE = 60 ;
private static long bytesToUs ( int bytes ) {
return ( 1000000L * bytes ) / BYTE_RATE ;
}
private static long bytesToUs ( long bytes ) {
return ( 1000000L * bytes ) / BYTE_RATE ;
}
private static final boolean PERFORMANCE_DEBUG = false ;
private static final boolean PERFORMANCE_FILL_GAPS = true ;
private boolean mRequestStop = false ;
private AudioEncodingHandler mEncoder ;
private AudioEncodingThread mEncoder ;
private AudioRecordingThread mRecorder ;
private ByteBufferPool mByteBufferPool ;
private Config mConfig ;
public static class Config {
int bitRate ;
public Config ( int bitRate ) {
this . bitRate = bitRate ;
}
}
public AudioMediaEncoder ( @NonNull Config config ) {
mConfig = config ;
}
@NonNull
@Override
String getName ( ) {
return "AudioEncoder" ;
private ByteBuffer mZeroBuffer ;
private final AudioTimestamp mTimestamp ;
private AudioConfig mConfig ;
private InputBufferPool mInputBufferPool = new InputBufferPool ( ) ;
private final LinkedBlockingQueue < InputBuffer > mInputBufferQueue = new LinkedBlockingQueue < > ( ) ;
// Just to debug performance.
private int mSendCount = 0 ;
private int mExecuteCount = 0 ;
private long mAvgSendDelay = 0 ;
private long mAvgExecuteDelay = 0 ;
private Map < Long , Long > mSendStartMap = new HashMap < > ( ) ;
public AudioMediaEncoder ( @NonNull AudioConfig config ) {
super ( "AudioEncoder" ) ;
mConfig = config . copy ( ) ;
mTimestamp = new AudioTimestamp ( mConfig . byteRate ( ) ) ;
// These two were in onPrepare() but it's better to do warm-up here
// since thread and looper creation is expensive.
mEncoder = new AudioEncodingThread ( ) ;
mRecorder = new AudioRecordingThread ( ) ;
}
@EncoderThread
@Override
void onPrepare ( @NonNull MediaEncoderEngine . Controller controller , long maxLengthMillis ) {
final MediaFormat audioFormat = MediaFormat . createAudioFormat ( MIME_TYPE , SAMPLING_FREQUENCY , CHANNELS_COUNT ) ;
protected void onPrepare ( @NonNull MediaEncoderEngine . Controller controller , long maxLengthMillis ) {
final MediaFormat audioFormat = MediaFormat . createAudioFormat (
mConfig . mimeType ,
mConfig . samplingFrequency ,
mConfig . channels ) ;
audioFormat . setInteger ( MediaFormat . KEY_AAC_PROFILE , MediaCodecInfo . CodecProfileLevel . AACObjectLC ) ;
audioFormat . setInteger ( MediaFormat . KEY_CHANNEL_MASK , CHANNELS ) ;
audioFormat . setInteger ( MediaFormat . KEY_BIT_RATE , mConfig . bitRate ) ;
audioFormat . setInteger ( MediaFormat . KEY_CHANNEL_COUNT , CHANNELS_COUNT ) ;
audioFormat . setInteger ( MediaFormat . KEY_CHANNEL_MASK , mConfig . audioFormatChannels ( ) ) ;
audioFormat . setInteger ( MediaFormat . KEY_BIT_RATE , mConfig . bitRate ) ; // TODO multiply by channels?
try {
mMediaCodec = MediaCodec . createEncoderByType ( MIME_TYPE ) ;
mMediaCodec = MediaCodec . createEncoderByType ( mConfig . mimeType ) ;
} catch ( IOException e ) {
throw new RuntimeException ( e ) ;
}
mMediaCodec . configure ( audioFormat , null , null , MediaCodec . CONFIGURE_FLAG_ENCODE ) ;
mMediaCodec . start ( ) ;
mByteBufferPool = new ByteBufferPool ( FRAME_SIZE , BUFFER_POOL_MAX_SIZE ) ;
mEncoder = new AudioEncodingHandler ( ) ;
mRecorder = new AudioRecordingThread ( ) ;
mByteBufferPool = new ByteBufferPool ( mConfig . frameSize ( ) , mConfig . bufferPoolMaxSize ( ) ) ;
mZeroBuffer = ByteBuffer . allocateDirect ( mConfig . frameSize ( ) ) ;
}
@EncoderThread
@Override
void onStart ( ) {
protected void onStart ( ) {
mRequestStop = false ;
mRecorder . start ( ) ;
mEncoder . start ( ) ;
}
@EncoderThread
@Override
void onEvent ( @NonNull String event , @Nullable Object data ) { }
@EncoderThread
@Override
void onStop ( ) {
protected void onStop ( ) {
mRequestStop = true ;
}
@Override
void onRelease ( ) {
protected void onStopped ( ) {
super . onStopped ( ) ;
mRequestStop = false ;
mEncoder = null ;
mRecorder = null ;
@ -138,25 +106,52 @@ public class AudioMediaEncoder extends MediaEncoder {
}
@Override
int getEncodedBitRate ( ) {
protected int getEncodedBitRate ( ) {
return mConfig . bitRate ;
}
class AudioRecordingThread extends Thread {
/ * *
* Sleeps for some frames duration , to skip them . This can be used to slow down
* the recording operation to balance it with encoding .
* /
private void skipFrames ( int frames ) {
try {
Thread . sleep ( AudioTimestamp . bytesToMillis (
mConfig . frameSize ( ) * frames ,
mConfig . byteRate ( ) ) ) ;
} catch ( InterruptedException ignore ) { }
}
/ * *
* A thread recording from microphone using { @link AudioRecord } class .
* Communicates with { @link AudioEncodingThread } using { @link # mInputBufferQueue } .
* /
private class AudioRecordingThread extends Thread {
private AudioRecord mAudioRecord ;
private ByteBuffer mCurrentBuffer ;
private int mReadBytes ;
private long mLastTimeUs ;
AudioRecordingThread ( ) {
final int minBufferSize = AudioRecord . getMinBufferSize ( SAMPLING_FREQUENCY , CHANNELS , ENCODING ) ;
int bufferSize = FRAME_SIZE * 25 ; // Make this bigger so we don't skip frames.
private long mFirstTimeUs = Long . MIN_VALUE ;
private AudioRecordingThread ( ) {
final int minBufferSize = AudioRecord . getMinBufferSize (
mConfig . samplingFrequency ,
mConfig . audioFormatChannels ( ) ,
mConfig . encoding ) ;
// Make this bigger so we don't skip frames. 25: Stereo: 51200. Mono: 25600
// 25 is quite big already. Tried to make it bigger to solve the read() delay
// but it just makes things worse (ruins MONO as well).
// Tried to make it smaller and things change as well.
int bufferSize = mConfig . frameSize ( ) * mConfig . audioRecordBufferFrames ( ) ;
while ( bufferSize < minBufferSize ) {
bufferSize + = FRAME_SIZE ; // Unlikely I think.
bufferSize + = mConfig . frameSize ( ) ; // Unlikely.
}
mAudioRecord = new AudioRecord ( MediaRecorder . AudioSource . CAMCORDER ,
SAMPLING_FREQUENCY , CHANNELS , ENCODING , bufferSize ) ;
mConfig . samplingFrequency ,
mConfig . audioFormatChannels ( ) ,
mConfig . encoding ,
bufferSize ) ;
setPriority ( Thread . MAX_PRIORITY ) ;
}
@ -179,17 +174,41 @@ public class AudioMediaEncoder extends MediaEncoder {
private void read ( boolean endOfStream ) {
mCurrentBuffer = mByteBufferPool . get ( ) ;
if ( mCurrentBuffer = = null ) {
LOG . e ( "read thread - eos:" , endOfStream , "- Skipping audio frame, encoding is too slow." ) ;
// Should fix the next presentation time here, but
// This can happen and it means that encoding is slow with respect to recording.
// One might be tempted to fix precisely the next frame presentation time when this happens,
// but this is not needed because the current increaseTime() algorithm will consider delays
// when they get large.
// Sleeping before returning is a good way of balancing the two operations.
// However, if endOfStream, we CAN'T lose this frame!
if ( endOfStream ) {
LOG . v ( "read thread - eos: true - No buffer, retrying." ) ;
read ( true ) ; // try again
} else {
LOG . w ( "read thread - eos: false - Skipping audio frame, encoding is too slow." ) ;
skipFrames ( 6 ) ; // sleep a bit
}
} else {
mCurrentBuffer . clear ( ) ;
mReadBytes = mAudioRecord . read ( mCurrentBuffer , FRAME_SIZE ) ;
// When stereo, we read twice the data here and AudioRecord will fill the buffer
// with left and right bytes. https://stackoverflow.com/q/20594750/4288782
if ( PERFORMANCE_DEBUG ) {
long before = System . nanoTime ( ) ;
mReadBytes = mAudioRecord . read ( mCurrentBuffer , mConfig . frameSize ( ) ) ;
long after = System . nanoTime ( ) ;
float delayMillis = ( after - before ) / 1000000F ;
float durationMillis = AudioTimestamp . bytesToMillis ( mReadBytes , mConfig . byteRate ( ) ) ;
LOG . v ( "read thread - reading took:" , delayMillis ,
"should be:" , durationMillis ,
"delay:" , delayMillis - durationMillis ) ;
} else {
mReadBytes = mAudioRecord . read ( mCurrentBuffer , mConfig . frameSize ( ) ) ;
}
LOG . i ( "read thread - eos:" , endOfStream , "- Read new audio frame. Bytes:" , mReadBytes ) ;
if ( mReadBytes > 0 ) { // Good read: increase PTS.
mLastTimeUs = increaseTime ( mReadBytes ) ;
LOG . i ( "read thread - eos:" , endOfStream , "- Frame PTS:" , mLastTimeUs ) ;
increaseTime ( mReadBytes , endOfStream ) ;
LOG . i ( "read thread - eos:" , endOfStream , "- mLastTimeUs :" , mLastTimeUs ) ;
mCurrentBuffer . limit ( mReadBytes ) ;
onBuffer ( endOfStream ) ;
enqueue ( mCurrentBuffer , mLastTimeUs , endOfStream ) ;
} else if ( mReadBytes = = AudioRecord . ERROR_INVALID_OPERATION ) {
LOG . e ( "read thread - eos:" , endOfStream , "- Got AudioRecord.ERROR_INVALID_OPERATION" ) ;
} else if ( mReadBytes = = AudioRecord . ERROR_BAD_VALUE ) {
@ -199,174 +218,153 @@ public class AudioMediaEncoder extends MediaEncoder {
}
/ * *
* New data at position buffer . position ( ) of size buffer . remaining ( )
* has been written into this buffer . This method should pass the data
* to the consumer .
* Increases presentation time and checks for max length constraint . This is much faster
* then waiting for the encoder to check it during { @link # drainOutput ( boolean ) } . We
* want to catch this as soon as possible so we stop recording useless frames and bother
* all the threads involved .
* @param readBytes bytes read in last reading
* @param endOfStream end of stream ?
* /
private void onBuffer ( boolean endOfStream ) {
LOG . v ( "read thread - Sending buffer to encoder thread." ) ;
mEncoder . sendInputBuffer ( mCurrentBuffer , mLastTimeUs , endOfStream ) ;
}
private long increaseTime ( int readBytes ) {
return increaseTime3 ( readBytes ) ;
}
private void increaseTime ( int readBytes , boolean endOfStream ) {
// Get the latest frame timestamp.
mLastTimeUs = mTimestamp . increaseUs ( readBytes ) ;
if ( mFirstTimeUs = = Long . MIN_VALUE ) {
mFirstTimeUs = mLastTimeUs ;
// Compute the first frame milliseconds as well.
notifyFirstFrameMillis ( System . currentTimeMillis ( )
- AudioTimestamp . bytesToMillis ( readBytes , mConfig . byteRate ( ) ) ) ;
}
/ * *
* This method simply assumes that we read everything without losing a single US .
* It will use System . nanoTime ( ) just once , as the starting point .
* Of course we don ' t as there are things going on in this thread .
* /
@SuppressWarnings ( "unused" )
private long increaseTime1 ( int readBytes ) {
return mLastTimeUs + bytesToUs ( readBytes ) ;
}
// See if we reached the max length value.
boolean didReachMaxLength = ( mLastTimeUs - mFirstTimeUs ) > getMaxLengthMillis ( ) * 1000L ;
if ( didReachMaxLength & & ! endOfStream ) {
LOG . w ( "read thread - this frame reached the maxLength! deltaUs:" , mLastTimeUs - mFirstTimeUs ) ;
notifyMaxLengthReached ( ) ;
}
/ * *
* Just for testing , this method will use Api 24 method to retrieve the timestamp .
* This way we let the platform choose instead of making assumptions .
* /
@SuppressWarnings ( "unused" )
@RequiresApi ( 24 )
private long increaseTime2 ( int readBytes ) {
if ( mApi24Timestamp = = null ) {
mApi24Timestamp = new AudioTimestamp ( ) ;
// Add zeroes if we have huge gaps. Even if timestamps are correct, if we have gaps between
// them, the encoder might shrink all timestamps to have a continuous audio. This results
// in a video that is fast-forwarded.
// Adding zeroes does not solve the gaps issue - audio will still be distorted. But at
// least we get a video that has the correct playback speed.
if ( PERFORMANCE_FILL_GAPS ) {
int gaps = mTimestamp . getGapCount ( mConfig . frameSize ( ) ) ;
if ( gaps > 0 ) {
long gapStart = mTimestamp . getGapStartUs ( mLastTimeUs ) ;
long frameUs = AudioTimestamp . bytesToUs ( mConfig . frameSize ( ) , mConfig . byteRate ( ) ) ;
LOG . w ( "read thread - GAPS: trying to add" , gaps , "zeroed buffers" ) ;
for ( int i = 0 ; i < gaps ; i + + ) {
ByteBuffer zeroBuffer = mByteBufferPool . get ( ) ;
if ( zeroBuffer = = null ) {
LOG . e ( "read thread - GAPS: aborting because we have no free buffer." ) ;
break ;
}
;
zeroBuffer . position ( 0 ) ;
zeroBuffer . put ( mZeroBuffer ) ;
zeroBuffer . clear ( ) ;
enqueue ( zeroBuffer , gapStart , false ) ;
gapStart + = frameUs ;
}
}
}
mAudioRecord . getTimestamp ( mApi24Timestamp , AudioTimestamp . TIMEBASE_MONOTONIC ) ;
return mApi24Timestamp . nanoTime / 1000 ;
}
private AudioTimestamp mApi24Timestamp ;
/ * *
* This method looks like an improvement over { @link # increaseTime1 ( int ) } as it
* accounts for the current time as well . Adapted & improved . from Kickflip .
*
* This creates regular timestamps unless we accumulate a lot of delay ( greater than
* twice the buffer duration ) , in which case it creates a gap and starts again trying
* to be regular from the new point .
* /
private long increaseTime3 ( int readBytes ) {
long bufferDurationUs = bytesToUs ( readBytes ) ;
long bufferEndTimeUs = System . nanoTime ( ) / 1000 ; // now
long bufferStartTimeUs = bufferEndTimeUs - bufferDurationUs ;
// If this is the first time, the base time is the buffer start time.
if ( mBytesSinceBaseTime = = 0 ) mBaseTimeUs = bufferStartTimeUs ;
// Recompute time assuming that we are respecting the sampling frequency.
// This puts the time at the end of last read buffer, which means, where we
// should be if we had no delay / missed buffers.
long correctedTimeUs = mBaseTimeUs + bytesToUs ( mBytesSinceBaseTime ) ;
long correctionUs = bufferStartTimeUs - correctedTimeUs ;
// However, if the correction is too big (> 2*bufferDurationUs), reset to this point.
// This is triggered if we lose buffers and are recording/encoding at a slower rate.
if ( correctionUs > = 2L * bufferDurationUs ) {
mBaseTimeUs = bufferStartTimeUs ;
mBytesSinceBaseTime = readBytes ;
return mBaseTimeUs ;
} else {
mBytesSinceBaseTime + = readBytes ;
return correctedTimeUs ;
private void enqueue ( @NonNull ByteBuffer byteBuffer , long timestamp , boolean isEndOfStream ) {
if ( PERFORMANCE_DEBUG ) {
mSendStartMap . put ( timestamp , System . nanoTime ( ) / 1000000 ) ;
}
int readBytes = byteBuffer . remaining ( ) ;
InputBuffer inputBuffer = mInputBufferPool . get ( ) ;
//noinspection ConstantConditions
inputBuffer . source = byteBuffer ;
inputBuffer . timestamp = timestamp ;
inputBuffer . length = readBytes ;
inputBuffer . isEndOfStream = isEndOfStream ;
mInputBufferQueue . add ( inputBuffer ) ;
}
private long mBaseTimeUs ;
private long mBytesSinceBaseTime ;
}
/ * *
* This will be a super busy thread . It ' s important for it to be :
* - different than the recording thread : or we would miss a lot of audio
* - different than the ' encoder ' thread : we want that to be reactive .
* For example , a stop ( ) must become onStop ( ) soon , can ' t wait for all this draining .
* A thread encoding the microphone data using the media encoder APIs .
* Communicates with { @link AudioRecordingThread } using { @link # mInputBufferQueue } .
*
* We want to do this operation on a different thread than the recording one ( to avoid
* losing frames while we ' re working here ) , and different than the { @link MediaEncoder }
* own thread ( we want that to be reactive - stop ( ) must become onStop ( ) soon ) .
* /
@SuppressLint ( "HandlerLeak" )
class AudioEncodingHandler extends Handler {
InputBufferPool mInputBufferPool = new InputBufferPool ( ) ;
LinkedBlockingQueue < InputBuffer > mPendingOps = new LinkedBlockingQueue < > ( ) ;
AudioEncodingHandler ( ) {
super ( WorkerHandler . get ( "AudioEncodingHandler" ) . getLooper ( ) ) ;
}
void sendInputBuffer ( ByteBuffer buffer , long presentationTimeUs , boolean endOfStream ) {
int presentation1 = ( int ) ( presentationTimeUs > > 32 ) ;
int presentation2 = ( int ) ( presentationTimeUs ) ;
sendMessage ( obtainMessage ( endOfStream ? 1 : 0 , presentation1 , presentation2 , buffer ) ) ;
private class AudioEncodingThread extends Thread {
private AudioEncodingThread ( ) {
setPriority ( Thread . MAX_PRIORITY ) ;
}
@Override
public void handleMessage ( Message msg ) {
super . handleMessage ( msg ) ;
boolean endOfStream = msg . what = = 1 ;
long timestamp = ( ( ( long ) msg . arg1 ) < < 32 ) | ( ( ( long ) msg . arg2 ) & 0xffffffffL ) ;
LOG . i ( "encoding thread - got buffer. timestamp:" , timestamp , "eos:" , endOfStream ) ;
ByteBuffer buffer = ( ByteBuffer ) msg . obj ;
int readBytes = buffer . remaining ( ) ;
InputBuffer inputBuffer = mInputBufferPool . get ( ) ;
//noinspection ConstantConditions
inputBuffer . source = buffer ;
inputBuffer . timestamp = timestamp ;
inputBuffer . length = readBytes ;
inputBuffer . isEndOfStream = endOfStream ;
mPendingOps . add ( inputBuffer ) ;
performPendingOps ( endOfStream ) ;
}
private void performPendingOps ( boolean force ) {
LOG . i ( "encoding thread - performing" , mPendingOps . size ( ) , "pending operations. force:" , force ) ;
InputBuffer buffer ;
while ( ( buffer = mPendingOps . peek ( ) ) ! = null ) {
if ( force ) {
acquireInputBuffer ( buffer ) ;
performPendingOp ( buffer ) ;
} else if ( tryAcquireInputBuffer ( buffer ) ) {
performPendingOp ( buffer ) ;
public void run ( ) {
encoding : while ( true ) {
if ( mInputBufferQueue . isEmpty ( ) ) {
skipFrames ( 2 ) ;
} else {
break ; // Will try later.
LOG . i ( "encoding thread - performing" , mInputBufferQueue . size ( ) , "pending operations." ) ;
InputBuffer inputBuffer ;
while ( ( inputBuffer = mInputBufferQueue . peek ( ) ) ! = null ) {
// Performance logging
if ( PERFORMANCE_DEBUG ) {
long sendEnd = System . nanoTime ( ) / 1000000 ;
Long sendStart = mSendStartMap . remove ( inputBuffer . timestamp ) ;
if ( sendStart ! = null ) {
mAvgSendDelay = ( ( mAvgSendDelay * mSendCount ) + ( sendEnd - sendStart ) ) / ( + + mSendCount ) ;
LOG . v ( "send delay millis:" , sendEnd - sendStart , "average:" , mAvgSendDelay ) ;
} else {
// This input buffer was already processed (but tryAcquire failed for now).
}
}
// Actual work
if ( inputBuffer . isEndOfStream ) {
acquireInputBuffer ( inputBuffer ) ;
encode ( inputBuffer ) ;
break encoding ;
} else if ( tryAcquireInputBuffer ( inputBuffer ) ) {
encode ( inputBuffer ) ;
} else {
skipFrames ( 1 ) ;
}
}
}
}
// We got an end of stream.
mInputBufferPool . clear ( ) ;
if ( PERFORMANCE_DEBUG ) {
// After latest changes, the count here is not so different between MONO and STEREO.
// We get about 400 frames in both cases (430 for MONO, but doesn't seem like a big issue).
LOG . e ( "EXECUTE DELAY MILLIS:" , mAvgExecuteDelay , "COUNT:" , mExecuteCount ) ;
LOG . e ( "SEND DELAY MILLIS:" , mAvgSendDelay , "COUNT:" , mSendCount ) ;
}
}
private void performPendingOp ( InputBuffer buffer ) {
private void encode ( @NonNull InputBuffer buffer ) {
long executeStart = System . nanoTime ( ) / 1000000 ;
LOG . i ( "encoding thread - performing pending operation for timestamp:" , buffer . timestamp , "- encoding." ) ;
buffer . data . put ( buffer . source ) ; // TODO this copy is prob. the worst part here for performance
buffer . data . put ( buffer . source ) ; // NOTE: this copy is prob. the worst part here for performance
mByteBufferPool . recycle ( buffer . source ) ;
mPendingOps . remove ( buffer ) ;
mInputBufferQueue . remove ( buffer ) ;
encodeInputBuffer ( buffer ) ;
boolean eos = buffer . isEndOfStream ;
mInputBufferPool . recycle ( buffer ) ;
if ( eos ) mInputBufferPool . clear ( ) ;
LOG . i ( "encoding thread - performing pending operation for timestamp:" , buffer . timestamp , "- draining." ) ;
// NOTE: can consider calling this drainOutput on yet another thread, which would let us
// use an even smaller BUFFER_POOL_MAX_SIZE without losing audio frames. But this way
// we can accumulate delay on this new thread without noticing (no pool getting empty).
if ( true ) {
drainOutput ( eos ) ;
if ( eos ) WorkerHandler . get ( "AudioEncodingHandler" ) . getThread ( ) . interrupt ( ) ;
} else {
// Testing the option above.
WorkerHandler . get ( "AudioEncodingDrainer" ) . remove ( drainRunnable ) ;
WorkerHandler . get ( "AudioEncodingDrainer" ) . remove ( drainRunnableEos ) ;
WorkerHandler . get ( "AudioEncodingDrainer" ) . post ( eos ? drainRunnableEos : drainRunnable ) ;
}
}
drainOutput ( buffer . isEndOfStream ) ;
private final Runnable drainRunnable = new Runnable ( ) {
@Override
public void run ( ) {
drainOutput ( false ) ;
if ( PERFORMANCE_DEBUG ) {
long executeEnd = System . nanoTime ( ) / 1000000 ;
mAvgExecuteDelay = ( ( mAvgExecuteDelay * mExecuteCount ) + ( executeEnd - executeStart ) ) / ( + + mExecuteCount ) ;
LOG . v ( "execute delay millis:" , executeEnd - executeStart , "average:" , mAvgExecuteDelay ) ;
}
} ;
private final Runnable drainRunnableEos = new Runnable ( ) {
@Override
public void run ( ) {
drainOutput ( true ) ;
WorkerHandler . get ( "AudioEncodingHandler" ) . getThread ( ) . interrupt ( ) ;
WorkerHandler . get ( "AudioEncodingDrainer" ) . getThread ( ) . interrupt ( ) ;
}
} ;
}
}
}
Mattia Iavarone
5 years ago
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