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MOHAWK: Move makeMohawkWaveStream out of the Sound class
This commit is contained in:
Bastien Bouclet
parent
a13aa26207
commit
e55758f444
@ -37,6 +37,150 @@
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namespace Mohawk {
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Audio::RewindableAudioStream *makeMohawkWaveStream(Common::SeekableReadStream *stream, CueList *cueList) {
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uint32 tag = 0;
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ADPCMStatus adpcmStatus;
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DataChunk dataChunk;
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uint32 dataSize = 0;
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memset(&dataChunk, 0, sizeof(DataChunk));
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if (stream->readUint32BE() != ID_MHWK) // MHWK tag again
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error ("Could not find tag 'MHWK'");
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stream->readUint32BE(); // Skip size
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if (stream->readUint32BE() != ID_WAVE)
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error ("Could not find tag 'WAVE'");
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while (!dataChunk.audioData) {
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tag = stream->readUint32BE();
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switch (tag) {
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case ID_ADPC:
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debug(2, "Found Tag ADPC");
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// ADPCM Sound Only
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//
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// This is useful for seeking in the stream, and is actually quite brilliant
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// considering some of the other things Broderbund did with the engine.
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// Only Riven and CSTime are known to use ADPCM audio and only CSTime
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// actually requires this for seeking. On the other hand, it may be interesting
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// to look at that one Riven sample that uses the cue points.
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//
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// Basically, the sample frame from the cue list is looked up here and then
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// sets the starting sample and step index at the point specified. Quite
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// an elegant/efficient system, really.
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adpcmStatus.size = stream->readUint32BE();
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adpcmStatus.itemCount = stream->readUint16BE();
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adpcmStatus.channels = stream->readUint16BE();
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adpcmStatus.statusItems = new ADPCMStatus::StatusItem[adpcmStatus.itemCount];
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assert(adpcmStatus.channels <= 2);
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for (uint16 i = 0; i < adpcmStatus.itemCount; i++) {
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adpcmStatus.statusItems[i].sampleFrame = stream->readUint32BE();
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for (uint16 j = 0; j < adpcmStatus.channels; j++) {
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adpcmStatus.statusItems[i].channelStatus[j].last = stream->readSint16BE();
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adpcmStatus.statusItems[i].channelStatus[j].stepIndex = stream->readUint16BE();
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}
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}
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// TODO: Actually use this chunk. For now, just delete the status items...
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delete[] adpcmStatus.statusItems;
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break;
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case ID_CUE:
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debug(2, "Found Tag Cue#");
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// Cues are used for animation sync. There are a couple in Myst and
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// Riven but are not used there at all.
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if (!cueList) {
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uint32 size = stream->readUint32BE();
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stream->skip(size);
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break;
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}
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cueList->size = stream->readUint32BE();
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cueList->pointCount = stream->readUint16BE();
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if (cueList->pointCount == 0)
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debug(2, "Cue# chunk found with no points!");
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else
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debug(2, "Cue# chunk found with %d point(s)!", cueList->pointCount);
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cueList->points.resize(cueList->pointCount);
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for (uint16 i = 0; i < cueList->pointCount; i++) {
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cueList->points[i].sampleFrame = stream->readUint32BE();
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byte nameLength = stream->readByte();
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cueList->points[i].name.clear();
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for (byte j = 0; j < nameLength; j++)
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cueList->points[i].name += stream->readByte();
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// Realign to an even boundary
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if (!(nameLength & 1))
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stream->readByte();
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debug (3, "Cue# chunk point %d (frame %d): %s", i, cueList->points[i].sampleFrame, cueList->points[i].name.c_str());
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}
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break;
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case ID_DATA:
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debug(2, "Found Tag DATA");
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// We subtract 20 from the actual chunk size, which is the total size
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// of the chunk's header
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dataSize = stream->readUint32BE() - 20;
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dataChunk.sampleRate = stream->readUint16BE();
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dataChunk.sampleCount = stream->readUint32BE();
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dataChunk.bitsPerSample = stream->readByte();
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dataChunk.channels = stream->readByte();
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dataChunk.encoding = stream->readUint16BE();
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dataChunk.loopCount = stream->readUint16BE();
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dataChunk.loopStart = stream->readUint32BE();
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dataChunk.loopEnd = stream->readUint32BE();
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// NOTE: We currently ignore all of the loop parameters here. Myst uses the
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// loopCount variable but the loopStart and loopEnd are always 0 and the size of
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// the sample. Myst ME doesn't use the Mohawk Sound format and just standard WAVE
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// files and therefore does not contain any of this metadata and we have to specify
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// whether or not to loop elsewhere.
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dataChunk.audioData = stream->readStream(dataSize);
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break;
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default:
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error ("Unknown tag found in 'tWAV' chunk -- '%s'", tag2str(tag));
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}
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}
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// makeMohawkWaveStream always takes control of the original stream
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delete stream;
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// The sound in Myst uses raw unsigned 8-bit data
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// The sound in the CD version of Riven is encoded in Intel DVI ADPCM
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// The sound in the DVD version of Riven is encoded in MPEG-2 Layer II or Intel DVI ADPCM
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if (dataChunk.encoding == kCodecRaw) {
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byte flags = Audio::FLAG_UNSIGNED;
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if (dataChunk.channels == 2)
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flags |= Audio::FLAG_STEREO;
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return Audio::makeRawStream(dataChunk.audioData, dataChunk.sampleRate, flags);
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} else if (dataChunk.encoding == kCodecADPCM) {
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uint32 blockAlign = dataChunk.channels * dataChunk.bitsPerSample / 8;
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return Audio::makeADPCMStream(dataChunk.audioData, DisposeAfterUse::YES, dataSize, Audio::kADPCMDVI, dataChunk.sampleRate, dataChunk.channels, blockAlign);
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} else if (dataChunk.encoding == kCodecMPEG2) {
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#ifdef USE_MAD
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return Audio::makeMP3Stream(dataChunk.audioData, DisposeAfterUse::YES);
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#else
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warning ("MAD library not included - unable to play MP2 audio");
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#endif
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} else {
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error ("Unknown Mohawk WAVE encoding %d", dataChunk.encoding);
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}
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return nullptr;
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}
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Sound::Sound(MohawkEngine* vm) : _vm(vm) {
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_midiDriver = NULL;
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_midiParser = NULL;
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@ -384,150 +528,6 @@ void Sound::resumeSLST() {
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_vm->_mixer->pauseHandle(*_currentSLSTSounds[i].handle, false);
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}
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Audio::RewindableAudioStream *Sound::makeMohawkWaveStream(Common::SeekableReadStream *stream, CueList *cueList) {
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uint32 tag = 0;
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ADPCMStatus adpcmStatus;
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DataChunk dataChunk;
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uint32 dataSize = 0;
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memset(&dataChunk, 0, sizeof(DataChunk));
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if (stream->readUint32BE() != ID_MHWK) // MHWK tag again
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error ("Could not find tag 'MHWK'");
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stream->readUint32BE(); // Skip size
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if (stream->readUint32BE() != ID_WAVE)
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error ("Could not find tag 'WAVE'");
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while (!dataChunk.audioData) {
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tag = stream->readUint32BE();
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switch (tag) {
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case ID_ADPC:
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debug(2, "Found Tag ADPC");
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// ADPCM Sound Only
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//
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// This is useful for seeking in the stream, and is actually quite brilliant
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// considering some of the other things Broderbund did with the engine.
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// Only Riven and CSTime are known to use ADPCM audio and only CSTime
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// actually requires this for seeking. On the other hand, it may be interesting
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// to look at that one Riven sample that uses the cue points.
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//
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// Basically, the sample frame from the cue list is looked up here and then
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// sets the starting sample and step index at the point specified. Quite
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// an elegant/efficient system, really.
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adpcmStatus.size = stream->readUint32BE();
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adpcmStatus.itemCount = stream->readUint16BE();
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adpcmStatus.channels = stream->readUint16BE();
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adpcmStatus.statusItems = new ADPCMStatus::StatusItem[adpcmStatus.itemCount];
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assert(adpcmStatus.channels <= 2);
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for (uint16 i = 0; i < adpcmStatus.itemCount; i++) {
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adpcmStatus.statusItems[i].sampleFrame = stream->readUint32BE();
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for (uint16 j = 0; j < adpcmStatus.channels; j++) {
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adpcmStatus.statusItems[i].channelStatus[j].last = stream->readSint16BE();
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adpcmStatus.statusItems[i].channelStatus[j].stepIndex = stream->readUint16BE();
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}
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}
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// TODO: Actually use this chunk. For now, just delete the status items...
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delete[] adpcmStatus.statusItems;
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break;
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case ID_CUE:
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debug(2, "Found Tag Cue#");
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// Cues are used for animation sync. There are a couple in Myst and
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// Riven but are not used there at all.
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if (!cueList) {
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uint32 size = stream->readUint32BE();
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stream->skip(size);
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break;
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}
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cueList->size = stream->readUint32BE();
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cueList->pointCount = stream->readUint16BE();
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if (cueList->pointCount == 0)
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debug(2, "Cue# chunk found with no points!");
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else
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debug(2, "Cue# chunk found with %d point(s)!", cueList->pointCount);
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cueList->points.resize(cueList->pointCount);
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for (uint16 i = 0; i < cueList->pointCount; i++) {
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cueList->points[i].sampleFrame = stream->readUint32BE();
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byte nameLength = stream->readByte();
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cueList->points[i].name.clear();
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for (byte j = 0; j < nameLength; j++)
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cueList->points[i].name += stream->readByte();
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// Realign to an even boundary
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if (!(nameLength & 1))
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stream->readByte();
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debug (3, "Cue# chunk point %d (frame %d): %s", i, cueList->points[i].sampleFrame, cueList->points[i].name.c_str());
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}
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break;
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case ID_DATA:
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debug(2, "Found Tag DATA");
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// We subtract 20 from the actual chunk size, which is the total size
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// of the chunk's header
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dataSize = stream->readUint32BE() - 20;
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dataChunk.sampleRate = stream->readUint16BE();
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dataChunk.sampleCount = stream->readUint32BE();
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dataChunk.bitsPerSample = stream->readByte();
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dataChunk.channels = stream->readByte();
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dataChunk.encoding = stream->readUint16BE();
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dataChunk.loopCount = stream->readUint16BE();
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dataChunk.loopStart = stream->readUint32BE();
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dataChunk.loopEnd = stream->readUint32BE();
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// NOTE: We currently ignore all of the loop parameters here. Myst uses the
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// loopCount variable but the loopStart and loopEnd are always 0 and the size of
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// the sample. Myst ME doesn't use the Mohawk Sound format and just standard WAVE
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// files and therefore does not contain any of this metadata and we have to specify
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// whether or not to loop elsewhere.
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dataChunk.audioData = stream->readStream(dataSize);
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break;
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default:
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error ("Unknown tag found in 'tWAV' chunk -- '%s'", tag2str(tag));
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}
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}
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// makeMohawkWaveStream always takes control of the original stream
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delete stream;
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// The sound in Myst uses raw unsigned 8-bit data
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// The sound in the CD version of Riven is encoded in Intel DVI ADPCM
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// The sound in the DVD version of Riven is encoded in MPEG-2 Layer II or Intel DVI ADPCM
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if (dataChunk.encoding == kCodecRaw) {
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byte flags = Audio::FLAG_UNSIGNED;
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if (dataChunk.channels == 2)
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flags |= Audio::FLAG_STEREO;
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return Audio::makeRawStream(dataChunk.audioData, dataChunk.sampleRate, flags);
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} else if (dataChunk.encoding == kCodecADPCM) {
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uint32 blockAlign = dataChunk.channels * dataChunk.bitsPerSample / 8;
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return Audio::makeADPCMStream(dataChunk.audioData, DisposeAfterUse::YES, dataSize, Audio::kADPCMDVI, dataChunk.sampleRate, dataChunk.channels, blockAlign);
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} else if (dataChunk.encoding == kCodecMPEG2) {
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#ifdef USE_MAD
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return Audio::makeMP3Stream(dataChunk.audioData, DisposeAfterUse::YES);
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#else
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warning ("MAD library not included - unable to play MP2 audio");
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#endif
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} else {
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error ("Unknown Mohawk WAVE encoding %d", dataChunk.encoding);
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}
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return NULL;
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}
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Audio::RewindableAudioStream *Sound::makeLivingBooksWaveStream_v1(Common::SeekableReadStream *stream) {
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uint16 header = stream->readUint16BE();
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uint16 rate = 0;
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@ -116,6 +116,8 @@ struct DataChunk {
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Common::SeekableReadStream *audioData;
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};
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Audio::RewindableAudioStream *makeMohawkWaveStream(Common::SeekableReadStream *stream, CueList *cueList = nullptr);
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class MohawkEngine;
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class Sound {
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@ -158,7 +160,6 @@ private:
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MidiParser *_midiParser;
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byte *_midiData;
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static Audio::RewindableAudioStream *makeMohawkWaveStream(Common::SeekableReadStream *stream, CueList *cueList = NULL);
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static Audio::RewindableAudioStream *makeLivingBooksWaveStream_v1(Common::SeekableReadStream *stream);
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void initMidi();
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