void *FileReaderThread::DiskReaderEntry (void *inRefCon)
{
FileReaderThread *This = (FileReaderThread *)inRefCon;
This->ReadNextChunk();
#if DEBUG
printf ("finished with reading file\n");
#endif
return 0;
}
static void *FileReaderThread_DiskReaderEntry (void *inRefCon)
{
FileReaderThread *frt = (FileReaderThread *)inRefCon;
frt->ReadNextChunk(frt);
#if DEBUG
printf ("finished with reading file\n");
#endif
return 0;
}
void AudioFileReaderThread::AfterRender ()
{
if (mNumTimesAskedSinceFinished > 0)
{
bool didLock = false;
if (sReaderThread.GetGuard().Try (didLock)) {
mParent.DoNotification (kAudioFilePlay_FileIsFinished);
if (didLock)
sReaderThread.GetGuard().Unlock();
}
}
if (mLockUnsuccessful)
mLockUnsuccessful = !sReaderThread.TryNextRead (this);
}
OSStatus AudioFileReaderThread::GetFileData (void** inOutData, UInt32 *inOutDataSize, UInt32 *outPacketCount, AudioStreamPacketDescription **outPacketDescriptions)
{
if (mFinishedReadingData)
{
++mNumTimesAskedSinceFinished;
*inOutDataSize = 0;
*inOutData = 0;
return noErr;
}
if (mReadFromFirstBuffer == mWriteToFirstBuffer) {
#if DEBUG
printf ("* * * * * * * Can't keep up with reading file:%ld\n", mParent.GetBusNumber());
#endif
mParent.DoNotification (kAudioFilePlayErr_FilePlayUnderrun);
*inOutDataSize = 0;
*inOutData = 0;
} else {
*inOutDataSize = mCurrentByteCountInBuffer;
*inOutData = mReadFromFirstBuffer ? mFileBuffer : (mFileBuffer + (mChunkSizeInPackets * mMaxPacketSize));
*outPacketCount = mCurrentPacketCountInBuffer;
*outPacketDescriptions = mReadFromFirstBuffer ? mPacketDescriptions : (mPacketDescriptions + mChunkSizeInPackets);
}
mLockUnsuccessful = !sReaderThread.TryNextRead (this);
mReadFromFirstBuffer = !mReadFromFirstBuffer;
return noErr;
}
void AudioFileReaderThread::Disconnect ()
{
if (mIsEngaged)
{
sReaderThread.RemoveReader (this);
mIsEngaged = false;
}
}
void AudioFileReaderThread::DoConnect ()
{
if (!mIsEngaged)
{
mFinishedReadingData = false;
mNumTimesAskedSinceFinished = -1;
mLockUnsuccessful = false;
UInt32 dataChunkSize = 0;
mCurrentPacketCountInBuffer = mChunkSizeInPackets;
#if LOG_DATA_FLOW
fprintf(stdout, "***** DoConnect - AFReadPackets from (pkts/offset) %ld/%qd\n", mCurrentPacketCountInBuffer, mReadPacketPosition);
#endif
OSStatus result = AudioFileReadPackets ( mAudioFileID,
false,
&dataChunkSize,
mPacketDescriptions,
mReadPacketPosition,
&mCurrentPacketCountInBuffer,
mFileBuffer);
THROW_RESULT("AudioFileReadPackets")
mCurrentByteCountInBuffer = dataChunkSize;
mReadPacketPosition = mCurrentPacketCountInBuffer;
mWriteToFirstBuffer = false;
mReadFromFirstBuffer = true;
sReaderThread.AddReader();
mIsEngaged = true;
}
else
throw static_cast<OSStatus>(-1); //thread has already been started
}
