mirror of
https://github.com/libretro/scummvm.git
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329 lines
10 KiB
C++
329 lines
10 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "common/debug.h"
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#include "audio/mididrv.h"
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#include "audio/midiparser.h"
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#include "audio/audiostream.h"
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#include "audio/decoders/adpcm.h"
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#include "audio/decoders/mp3.h"
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#include "audio/decoders/raw.h"
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#include "audio/decoders/wave.h"
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#include "mohawk/mohawk.h"
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#include "mohawk/sound.h"
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#include "mohawk/resource.h"
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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 = 0;
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if (dataChunk.channels == 2)
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flags |= Audio::FLAG_STEREO;
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if (dataChunk.bitsPerSample == 16)
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flags |= Audio::FLAG_16BITS;
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else
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flags |= Audio::FLAG_UNSIGNED;
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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) :
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_vm(vm) {
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}
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Sound::~Sound() {
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stopSound();
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}
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Audio::RewindableAudioStream *Sound::makeAudioStream(uint16 id, CueList *cueList) {
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Audio::RewindableAudioStream *audStream = nullptr;
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switch (_vm->getGameType()) {
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case GType_LIVINGBOOKSV1:
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audStream = makeLivingBooksWaveStream_v1(_vm->getResource(ID_WAV, id));
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break;
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case GType_LIVINGBOOKSV2:
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if (_vm->getPlatform() == Common::kPlatformMacintosh) {
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audStream = makeLivingBooksWaveStream_v1(_vm->getResource(ID_WAV, id));
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break;
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}
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// fall through
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default:
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audStream = makeMohawkWaveStream(_vm->getResource(ID_TWAV, id), cueList);
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}
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return audStream;
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}
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Audio::SoundHandle *Sound::playSound(uint16 id, byte volume, bool loop, CueList *cueList) {
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debug (0, "Playing sound %d", id);
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Audio::RewindableAudioStream *rewindStream = makeAudioStream(id, cueList);
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if (rewindStream) {
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SndHandle *handle = getHandle();
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handle->type = kUsedHandle;
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handle->id = id;
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handle->samplesPerSecond = rewindStream->getRate();
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// Set the stream to loop here if it's requested
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Audio::AudioStream *audStream = rewindStream;
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if (loop)
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audStream = Audio::makeLoopingAudioStream(rewindStream, 0);
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_vm->_mixer->playStream(Audio::Mixer::kPlainSoundType, &handle->handle, audStream, -1, volume);
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return &handle->handle;
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}
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return nullptr;
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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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uint32 size = 0;
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if (header == 'Wv') { // Big Endian
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rate = stream->readUint16BE();
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stream->skip(10); // Unknown
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size = stream->readUint32BE();
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} else if (header == 'vW') { // Little Endian
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stream->readUint16LE(); // Unknown
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rate = stream->readUint16LE();
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stream->skip(8); // Unknown
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size = stream->readUint32LE();
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} else
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error("Could not find Old Mohawk Sound header");
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Common::SeekableReadStream *dataStream = stream->readStream(size);
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delete stream;
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return Audio::makeRawStream(dataStream, rate, Audio::FLAG_UNSIGNED);
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}
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SndHandle *Sound::getHandle() {
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for (uint32 i = 0; i < _handles.size(); i++) {
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if (_handles[i].type == kFreeHandle)
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return &_handles[i];
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if (!_vm->_mixer->isSoundHandleActive(_handles[i].handle)) {
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_handles[i].type = kFreeHandle;
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_handles[i].id = 0;
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return &_handles[i];
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}
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}
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// Let's add a new sound handle!
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SndHandle handle;
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handle.handle = Audio::SoundHandle();
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handle.type = kFreeHandle;
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handle.id = 0;
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_handles.push_back(handle);
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return &_handles[_handles.size() - 1];
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}
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void Sound::stopSound() {
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for (uint32 i = 0; i < _handles.size(); i++)
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if (_handles[i].type == kUsedHandle) {
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_vm->_mixer->stopHandle(_handles[i].handle);
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_handles[i].type = kFreeHandle;
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_handles[i].id = 0;
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}
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}
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void Sound::stopSound(uint16 id) {
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for (uint32 i = 0; i < _handles.size(); i++)
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if (_handles[i].type == kUsedHandle && _handles[i].id == id) {
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_vm->_mixer->stopHandle(_handles[i].handle);
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_handles[i].type = kFreeHandle;
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_handles[i].id = 0;
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}
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}
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bool Sound::isPlaying(uint16 id) {
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for (uint32 i = 0; i < _handles.size(); i++)
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if (_handles[i].type == kUsedHandle && _handles[i].id == id)
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return _vm->_mixer->isSoundHandleActive(_handles[i].handle);
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return false;
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}
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bool Sound::isPlaying() {
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for (uint32 i = 0; i < _handles.size(); i++)
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if (_handles[i].type == kUsedHandle)
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if (_vm->_mixer->isSoundHandleActive(_handles[i].handle))
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return true;
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return false;
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}
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uint Sound::getNumSamplesPlayed(uint16 id) {
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for (uint32 i = 0; i < _handles.size(); i++)
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if (_handles[i].type == kUsedHandle && _handles[i].id == id) {
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return (_vm->_mixer->getSoundElapsedTime(_handles[i].handle) * _handles[i].samplesPerSecond) / 1000;
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}
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return 0;
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}
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} // End of namespace Mohawk
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