void ASFStream::parseStreamHeader() {
ASFGUID guid = ASFGUID(*_stream);
if (guid != s_asfAudioStream)
throw Common::Exception("ASFStream::parseStreamHeader(): Found non-audio stream");
_stream->skip(16); // skip a guid
_stream->readUint64LE(); // total size
uint32 typeSpecificSize = _stream->readUint32LE();
_stream->readUint32LE();
_streamID = _stream->readUint16LE();
_stream->readUint32LE();
// Parse the wave header
_compression = _stream->readUint16LE();
_channels = _stream->readUint16LE();
_sampleRate = _stream->readUint32LE();
_bitRate = _stream->readUint32LE() * 8;
_blockAlign = _stream->readUint16LE();
_bitsPerCodedSample = (typeSpecificSize == 14) ? 8 : _stream->readUint16LE();
if (typeSpecificSize >= 18) {
uint32 cbSize = _stream->readUint16LE();
cbSize = MIN<int>(cbSize, typeSpecificSize - 18);
_extraData = _stream->readStream(cbSize);
}
_codec = createCodec();
}
AVIDecoder::AVIVideoTrack::AVIVideoTrack(int frameCount, const AVIStreamHeader &streamHeader, const BitmapInfoHeader &bitmapInfoHeader, byte *initialPalette)
: _frameCount(frameCount), _vidsHeader(streamHeader), _bmInfo(bitmapInfoHeader), _initialPalette(initialPalette) {
_videoCodec = createCodec();
_lastFrame = 0;
_curFrame = -1;
useInitialPalette();
}
AVIDecoder::AVIVideoTrack::AVIVideoTrack(int frameCount, const AVIStreamHeader &streamHeader, const BitmapInfoHeader &bitmapInfoHeader)
: _frameCount(frameCount), _vidsHeader(streamHeader), _bmInfo(bitmapInfoHeader) {
memset(_palette, 0, sizeof(_palette));
_videoCodec = createCodec();
_dirtyPalette = false;
_lastFrame = 0;
_curFrame = -1;
}
bool AVIDecoder::AVIVideoTrack::rewind() {
_curFrame = -1;
useInitialPalette();
delete _videoCodec;
_videoCodec = createCodec();
_lastFrame = 0;
return true;
}
bool AviDecoder::loadStream(Common::SeekableReadStream *stream) {
close();
_fileStream = stream;
_decodedHeader = false;
// Read chunks until we have decoded the header
while (!_decodedHeader)
runHandle(_fileStream->readUint32BE());
uint32 nextTag = _fileStream->readUint32BE();
// Throw out any JUNK section
if (nextTag == ID_JUNK) {
runHandle(ID_JUNK);
nextTag = _fileStream->readUint32BE();
}
// Ignore the 'movi' LIST
if (nextTag == ID_LIST) {
_fileStream->readUint32BE(); // Skip size
if (_fileStream->readUint32BE() != ID_MOVI)
error ("Expected 'movi' LIST");
} else
error ("Expected 'movi' LIST");
// Now, create the codec
_videoCodec = createCodec();
// Initialize the video stuff too
_audStream = createAudioStream();
if (_audStream)
_mixer->playStream(_soundType, _audHandle, _audStream);
debug (0, "Frames = %d, Dimensions = %d x %d", _header.totalFrames, _header.width, _header.height);
debug (0, "Frame Rate = %d", _vidsHeader.rate / _vidsHeader.scale);
if (_wvInfo.samplesPerSec != 0)
debug (0, "Sound Rate = %d", _wvInfo.samplesPerSec);
debug (0, "Video Codec = \'%s\'", tag2str(_vidsHeader.streamHandler));
if (!_videoCodec)
return false;
return true;
}
void QuickTimeDecoder::init() {
// Remove non-Video/Audio streams
for (uint32 i = 0; i < _numStreams;) {
if (_streams[i]->codec_type == CODEC_TYPE_MOV_OTHER) {
delete _streams[i];
for (uint32 j = i + 1; j < _numStreams; j++)
_streams[j - 1] = _streams[j];
_numStreams--;
} else
i++;
}
// Adjust time/duration
for (uint32 i = 0; i < _numStreams; i++) {
MOVStreamContext *sc = _streams[i];
if (!sc->time_rate)
sc->time_rate = 1;
if (!sc->time_scale)
sc->time_scale = _timeScale;
sc->duration /= sc->time_rate;
if (sc->codec_type == CODEC_TYPE_VIDEO && _videoStreamIndex < 0)
_videoStreamIndex = i;
else if (sc->codec_type == CODEC_TYPE_AUDIO && _audioStreamIndex < 0)
_audioStreamIndex = i;
}
// Initialize audio, if present
if (_audioStreamIndex >= 0) {
STSDEntry *entry = &_streams[_audioStreamIndex]->stsdEntries[0];
if (checkAudioCodecSupport(entry->codecTag)) {
_audStream = Audio::makeQueuingAudioStream(entry->sampleRate, entry->channels == 2);
_curAudioChunk = 0;
// Make sure the bits per sample transfers to the sample size
if (entry->codecTag == MKID_BE('raw ') || entry->codecTag == MKID_BE('twos'))
_streams[_audioStreamIndex]->sample_size = (entry->bitsPerSample / 8) * entry->channels;
startAudio();
}
_audioStartOffset = Audio::Timestamp(0);
}
// Initialize video, if present
if (_videoStreamIndex >= 0) {
for (uint32 i = 0; i < _streams[_videoStreamIndex]->stsdEntryCount; i++) {
STSDEntry *entry = &_streams[_videoStreamIndex]->stsdEntries[i];
entry->videoCodec = createCodec(entry->codecTag, entry->bitsPerSample & 0x1F);
}
if (getScaleFactorX() != 1 || getScaleFactorY() != 1) {
// We have to initialize the scaled surface
_scaledSurface = new Graphics::Surface();
_scaledSurface->create(getWidth(), getHeight(), getPixelFormat().bytesPerPixel);
}
}
}
