void
writeSWFSoundWithSoundStreamToMethod(SWFSoundStream stream,
SWFByteOutputMethod method, void *data)
{
int source = stream->streamSource;
struct SWFSoundStreamBlock_s streamblock;
/* need to get the sample count && and rewind */
SWFSoundStream_getLength(stream, &streamblock);
SWFSoundStream_rewind(stream);
methodWriteUInt32(streamblock.numSamples, method, data);
methodWriteUInt16(stream->initialDelay, method, data);
if(source == STREAM_MP3)
write_mp3(&streamblock, method, data);
else if(source == STREAM_FLV)
write_flv(&streamblock, method, data);
}
/*
* DEPRECATED!
* returns the number of movie frames for a given sound stream
*
* This function returns the number of movie frames necessary to
* play the full sound stream.
* Works only if the sound stream object was added to a movie and the stream
* source is a mp3 file.
*
* Use SWFSoundStream_getDuration() instead.
*/
int SWFSoundStream_getFrames(SWFSoundStream stream)
{
int n, frameSize;
if(stream->streamSource == STREAM_FLV || stream->samplesPerFrame == 0)
{
SWF_warn("SWFSoundStream_getFrames works only if stream was assigned to a movie\n");
return -1;
}
if ( stream->sampleRate > 32000 )
frameSize = 1152;
else
frameSize = 576;
n = 0;
while(nextMP3Frame(stream->source.mp3.input) > 0)
n++;
SWFSoundStream_rewind(stream);
return n * frameSize / stream->samplesPerFrame;
}
static void
fillStreamBlock_mp3(SWFSoundStream stream, SWFSoundStreamBlock block)
{
int delay, wanted;
/* see how many frames we can put in this block,
see how big they are */
block->delay = stream->delay;
delay = stream->delay + stream->samplesPerFrame;
wanted = delay;
block->length = getMP3Samples(stream->source.mp3.input, stream->flags, &delay);
block->numSamples = delay;
if(block->length <= 0)
{
stream->isFinished = TRUE;
SWFSoundStream_rewind(stream);
}
stream->delay = wanted - delay;
}
static void
fillStreamBlock_flv(SWFSoundStream stream, SWFSoundStreamBlock block)
{
int ret;
if(AUDIO_CODEC(stream) == AUDIO_CODEC_MP3)
ret = fillBlock_flv_mp3(stream, block);
else if(AUDIO_CODEC(stream) == AUDIO_CODEC_NELLY ||
AUDIO_CODEC(stream) == AUDIO_CODEC_NELLY_MONO)
ret = fillBlock_flv_nelly(stream, block);
else
{
SWF_warn("unsupported codec %i\n", AUDIO_CODEC(stream));
ret = -1;
}
if(ret < 0)
{
stream->isFinished = TRUE;
SWFSoundStream_rewind(stream);
}
}
static void
fillStreamBlock_mp3(SWFSoundStream stream, SWFSoundStreamBlock block)
{
int delay, wanted;
static const int maxSC = 65535;
/* see how many frames we can put in this block,
see how big they are */
block->delay = stream->delay;
delay = stream->delay + stream->samplesPerFrame;
wanted = delay;
block->length = getMP3Samples(stream->source.mp3.input, stream->flags, &delay);
block->numSamples = delay;
if ( block->numSamples > maxSC ) {
SWF_warn("fillStreamBlock_mp3: number of samples in block (%d) exceed max allowed value of %d\n", block->numSamples, maxSC);
}
if(block->length <= 0)
{
stream->isFinished = TRUE;
SWFSoundStream_rewind(stream);
}
stream->delay = wanted - delay;
}
