public VorbisCodec( IMediaContainer container )
{
this.container = container;
reader = new PrimitiveReader( container );
bitReader = new BitReader( reader );
}
public void StreamData( IMediaContainer container )
{
container.ReadMetadata();
ICodec codec = container.GetAudioCodec();
chunks = codec.StreamData( container ).GetEnumerator();
for( int i = 0; i < bufferSize; i++ ) {
if( chunks.MoveNext() ) {
// We have to delay initialisation until we read the first chunk,
// as we cannot change wave format after initialisation.
if( i == 0 ) {
InitWinMm( chunks.Current );
}
SendNextBuffer( chunks.Current );
buffersIndex++;
}
}
while( true ) {
Thread.Sleep( 1 );
// TODO: fix playing slightly after disposed.
if( reachedEnd ) break;
}
}
public void StreamData( IMediaContainer container )
{
if( container == null ) throw new ArgumentNullException( "container" );
container.ReadMetadata();
ICodec codec = container.GetAudioCodec();
IEnumerable<AudioChunk> chunks = codec.StreamData( container );
// A buffer size of 2 is not enough for some codecs.
const int bufferSize = 3;
bufferIDs = new uint[bufferSize];
fixed( uint* bufferPtr = bufferIDs )
AL.GenBuffers( bufferSize, bufferPtr );
CheckError();
uint sourceU = 0;
AL.GenSources( 1, out sourceU );
source = sourceU;
CheckError();
// TODO: Handle the case where the file is less than 2 seconds long.
IEnumerator<AudioChunk> enumerator = chunks.GetEnumerator();
for( int i = 0; i < bufferIDs.Length; i++ ) {
enumerator.MoveNext();
AudioChunk chunk = enumerator.Current;
if( chunk == null || chunk.Data == null )
throw new InvalidOperationException( "chunk or chunk audio data is null." );
ALFormat format = GetALFormat( chunk.Channels, chunk.BitsPerSample );
AL.BufferData( bufferIDs[i], format, chunk.Data, chunk.Data.Length, chunk.Frequency );
CheckError();
}
AL.SourceQueueBuffers( source, bufferIDs.Length, bufferIDs );
CheckError();
AL.SourcePlay( source );
CheckError();
for( ; ; ) {
int buffersProcessed = 0;
AL.GetSource( source, ALGetSourcei.BuffersProcessed, out buffersProcessed );
CheckError();
if( buffersProcessed > 0 ) {
uint bufferId = 0;
AL.SourceUnqueueBuffers( source, 1, ref bufferId );
if( enumerator.MoveNext() ) {
AudioChunk chunk = enumerator.Current;
ALFormat format = GetALFormat( chunk.Channels, chunk.BitsPerSample );
AL.BufferData( bufferId, format, chunk.Data, chunk.Data.Length, chunk.Frequency );
CheckError();
AL.SourceQueueBuffers( source, 1, ref bufferId );
CheckError();
} else {
break;
}
}
Thread.Sleep( 1 );
}
Console.WriteLine( "Ran out of chunks!" );
int state;
// Query the source to find out when the last buffer stops playing.
for( ; ; ) {
AL.GetSource( source, ALGetSourcei.SourceState, out state );
if( (ALSourceState)state != ALSourceState.Playing ) {
break;
}
Thread.Sleep( 1 );
}
AL.DeleteBuffers( bufferIDs );
AL.DeleteSources( 1, ref source );
source = uint.MaxValue;
bufferIDs = null;
}