diff options
| -rw-r--r-- | audio/decoders/xa.cpp | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/audio/decoders/xa.cpp b/audio/decoders/xa.cpp index 9871775973..9b4f27f9fc 100644 --- a/audio/decoders/xa.cpp +++ b/audio/decoders/xa.cpp @@ -46,6 +46,7 @@ private: byte _samplesRemaining; int _rate; double _s1, _s2; + uint _loopPoint; }; XAStream::XAStream(Common::SeekableReadStream *stream, int rate, DisposeAfterUse::Flag disposeAfterUse) @@ -54,6 +55,7 @@ XAStream::XAStream(Common::SeekableReadStream *stream, int rate, DisposeAfterUse _predictor = 0; _s1 = _s2 = 0.0; _rate = rate; + _loopPoint = 0; } @@ -103,8 +105,20 @@ int XAStream::readBuffer(int16 *buffer, const int numSamples) { byte shift = _predictor & 0xf; _predictor >>= 4; - if (_stream->readByte() == 7) - return samplesDecoded; + byte flags = _stream->readByte(); + if (flags & 0x1) { + if (flags == 3) { + // Loop + rewind(); + continue; + } else { + // End of stream + return samplesDecoded; + } + } else if (flags & 0x4) { + // Set loop point + _loopPoint = _stream->pos() - 2; + } for (i = 0; i < 28; i += 2) { byte d = _stream->readByte(); @@ -135,7 +149,7 @@ int XAStream::readBuffer(int16 *buffer, const int numSamples) { } bool XAStream::rewind() { - _stream->seek(0); + _stream->seek(_loopPoint); _samplesRemaining = 0; _predictor = 0; _s1 = _s2 = 0.0; |