scummvm/engines/toon/audio.cpp
Torbjörn Andersson 1f6bc7e309 TOON: Fix distortion in some looped music
This was very noticeable in the footman conversation music.

svn-id: r53125
2010-10-10 16:13:55 +00:00

446 lines
11 KiB
C++

/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "toon/audio.h"
namespace Toon {
static int ADPCM_index[8] = {
-1, -1, -1, -1, 2 , 4 , 6 , 8
};
static int ADPCM_table[89] = {
7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
AudioManager::AudioManager(ToonEngine *vm, Audio::Mixer *mixer) : _vm(vm), _mixer(mixer) {
for (int32 i = 0; i < 16; i++)
_channels[i] = 0;
}
AudioManager::~AudioManager(void) {
}
void AudioManager::removeInstance(AudioStreamInstance *inst) {
debugC(1, kDebugAudio, "removeInstance(inst)");
for (int32 i = 0; i < 16; i++) {
if (inst == _channels[i])
_channels[i] = 0;
}
}
void AudioManager::playMusic(Common::String dir, Common::String music) {
debugC(1, kDebugAudio, "playMusic(%s, %s)", dir.c_str(), music.c_str());
// two musics can be played at same time
Common::String path = Common::String::printf("act%d/%s/%s.mus", _vm->state()->_currentChapter, dir.c_str(), music.c_str());
if (_currentMusicName == music)
return;
_currentMusicName = music;
// see what channel to take
if (_channels[0] && _channels[0]->isPlaying() && _channels[1] && _channels[1]->isPlaying()) {
// take the one that is fading
if (_channels[0]->isFading()) {
_channels[0]->stop(false);
_channels[1]->stop(true);
_currentMusicChannel = 0;
} else {
_channels[1]->stop(false);
_channels[0]->stop(true);
_currentMusicChannel = 1;
}
} else if (_channels[0] && _channels[0]->isPlaying()) {
_channels[0]->stop(true);
_currentMusicChannel = 1;
} else {
if (_channels[1] && _channels[1]->isPlaying())
_channels[1]->stop(true);
_currentMusicChannel = 0;
}
Common::SeekableReadStream *srs = _vm->resources()->openFile(path);
//if (!_channels[_currentMusicChannel])
// delete _channels[_currentMusicChannel];
_channels[_currentMusicChannel] = new AudioStreamInstance(this, _mixer, srs, true);
_channels[_currentMusicChannel]->play(true, Audio::Mixer::kMusicSoundType);
}
bool AudioManager::voiceStillPlaying() {
if (!_channels[2])
return false;
return _channels[2]->isPlaying();
}
void AudioManager::playVoice(int32 id, bool genericVoice) {
debugC(1, kDebugAudio, "playVoice(%d, %d)", id, (genericVoice) ? 1 : 0);
if (voiceStillPlaying()) {
// stop current voice
_channels[2]->stop(false);
}
Common::SeekableReadStream *stream ;
if (genericVoice)
stream = _audioPacks[0]->getStream(id);
else
stream = _audioPacks[1]->getStream(id);
_channels[2] = new AudioStreamInstance(this, _mixer, stream);
_channels[2]->play(false, Audio::Mixer::kSpeechSoundType);
}
void AudioManager::playSFX(int32 id, int32 volume , bool genericSFX) {
debugC(4, kDebugAudio, "playSFX(%d, %d)", id, (genericSFX) ? 1 : 0);
// find a free SFX channel
Common::SeekableReadStream *stream ;
if (genericSFX)
stream = _audioPacks[2]->getStream(id, true);
else
stream = _audioPacks[3]->getStream(id, true);
if (stream->size() == 0)
return;
for (int32 i = 3; i < 16; i++) {
if (!_channels[i]) {
_channels[i] = new AudioStreamInstance(this, _mixer, stream);
_channels[i]->play(false, Audio::Mixer::kSFXSoundType);
_channels[i]->setVolume(volume);
break;
}
}
}
void AudioManager::stopCurrentVoice() {
debugC(1, kDebugAudio, "stopCurrentVoice()");
if (_channels[2] && _channels[2]->isPlaying())
_channels[2]->stop(false);
}
bool AudioManager::loadAudioPack(int32 id, Common::String indexFile, Common::String packFile) {
debugC(4, kDebugAudio, "loadAudioPack(%d, %s, %s)", id, indexFile.c_str(), packFile.c_str());
_audioPacks[id] = new AudioStreamPackage(_vm);
return _audioPacks[id]->loadAudioPackage(indexFile, packFile);
}
void AudioManager::setMusicVolume(int32 volume) {
debugC(1, kDebugAudio, "setMusicVolume(%d)", volume);
if (_channels[0])
_channels[0]->setVolume(volume);
if (_channels[1])
_channels[1]->setVolume(volume);
}
void AudioManager::stopMusic() {
debugC(1, kDebugAudio, "stopMusic()");
if (_channels[0])
_channels[0]->stop(true);
if (_channels[1])
_channels[1]->stop(true);
}
AudioStreamInstance::~AudioStreamInstance() {
if (_man)
_man->removeInstance(this);
}
AudioStreamInstance::AudioStreamInstance(AudioManager *man, Audio::Mixer *mixer, Common::SeekableReadStream *stream , bool looping) {
_compBufferSize = 0;
_buffer = 0;
_bufferMaxSize = 0;
_mixer = mixer;
_compBuffer = 0;
_bufferOffset = 0;
_lastADPCMval1 = 0;
_lastADPCMval2 = 0;
_file = stream;
_fadingIn = false;
_fadingOut = false;
_fadeTime = 0;
_stopped = false;
_volume = 255;
_totalSize = stream->size();
_currentReadSize = 8;
_man = man;
_looping = looping;
// preload one packet
if (_totalSize > 0) {
_file->skip(8);
readPacket();
} else {
stopNow();
}
}
int32 AudioStreamInstance::readBuffer(int16 *buffer, const int numSamples) {
debugC(5, kDebugAudio, "readBuffer(buffer, %d)", numSamples);
handleFade(numSamples);
int32 leftSamples = numSamples;
int32 destOffset = 0;
if ((_bufferOffset + leftSamples) * 2 >= _bufferSize) {
if (_bufferSize - _bufferOffset * 2 > 0) {
memcpy(buffer, &_buffer[_bufferOffset], _bufferSize - _bufferOffset * 2);
leftSamples -= (_bufferSize - _bufferOffset * 2) / 2;
destOffset += (_bufferSize - _bufferOffset * 2) / 2;
}
if (!readPacket())
return 0;
_bufferOffset = 0;
}
if (leftSamples >= 0) {
memcpy(buffer + destOffset, &_buffer[_bufferOffset], MIN(leftSamples * 2, _bufferSize));
_bufferOffset += leftSamples;
}
return numSamples;
}
bool AudioStreamInstance::readPacket() {
debugC(5, kDebugAudio, "readPacket()");
if (_file->eos() || (_currentReadSize >= _totalSize)) {
if (_looping) {
_file->seek(8);
_currentReadSize = 8;
_lastADPCMval1 = 0;
_lastADPCMval2 = 0;
} else {
_bufferSize = 0;
stopNow();
return false;
}
}
int16 numCompressedBytes = _file->readSint16LE();
int16 numDecompressedBytes = _file->readSint16LE();
_file->readSint32LE();
if (numCompressedBytes > _compBufferSize) {
if (_compBuffer)
delete[] _compBuffer;
_compBufferSize = numCompressedBytes;
_compBuffer = new uint8[_compBufferSize];
}
if (numDecompressedBytes > _bufferMaxSize) {
if (_buffer)
delete [] _buffer;
_bufferMaxSize = numDecompressedBytes;
_buffer = new int16[numDecompressedBytes];
}
_bufferSize = numDecompressedBytes;
_file->read(_compBuffer, numCompressedBytes);
_currentReadSize += 8 + numCompressedBytes;
decodeADPCM(_compBuffer, _buffer, numCompressedBytes);
return true;
}
void AudioStreamInstance::decodeADPCM(uint8 *comp, int16 *dest, int32 packetSize) {
debugC(5, kDebugAudio, "decodeADPCM(comp, dest, %d)", packetSize);
int32 numSamples = 2 * packetSize ;
int32 v18 = _lastADPCMval1;
int32 v19 = _lastADPCMval2;
for (int32 i = 0; i < numSamples; i++) {
uint8 comm = *comp;
int32 v29 = i & 1;
int32 v30;
if (v29 == 0)
v30 = comm & 0xf;
else
v30 = (comm & 0xf0) >> 4;
int32 v31 = v30 & 0x8;
int32 v32 = v30 & 0x7;
int32 v33 = ADPCM_table[v19];
int32 v34 = v33 >> 3;
if (v32 & 4)
v34 += v33;
if (v32 & 2)
v34 += v33 >> 1;
if (v32 & 1)
v34 += v33 >> 2;
v19 += ADPCM_index[v32];
if (v19 < 0)
v19 = 0;
if (v19 > 88)
v19 = 88;
if (v31)
v18 -= v34;
else
v18 += v34;
if (v18 > 32767)
v18 = 32767;
else if (v18 < -32768)
v18 = -32768;
*dest = v18;
comp += v29;
dest++;
}
_lastADPCMval1 = v18;
_lastADPCMval2 = v19;
}
void AudioStreamInstance::play(bool fade, Audio::Mixer::SoundType soundType) {
debugC(1, kDebugAudio, "play(%d)", (fade) ? 1 : 0);
Audio::SoundHandle soundHandle;
_stopped = false;
_fadingIn = fade;
_fadeTime = 0;
_mixer->playStream(soundType, &_handle, this);
handleFade(0);
}
void AudioStreamInstance::handleFade(int numSamples) {
debugC(5, kDebugAudio, "handleFade(%d)", numSamples);
if (_fadingOut) {
_fadeTime += numSamples;
if (_fadeTime > 40960) {
_fadeTime = 40960;
stopNow();
_fadingOut = false;
}
_mixer->setChannelVolume(_handle, _volume - _fadeTime * _volume / 40960);
} else {
if (_fadingIn) {
_fadeTime += numSamples;
if (_fadeTime > 40960) {
_fadeTime = 40960;
_fadingIn = false;
}
_mixer->setChannelVolume(_handle, _volume * _fadeTime / 40960);
}
}
}
void AudioStreamInstance::stop(bool fade /*= false*/) {
debugC(1, kDebugAudio, "stop(%d)", (fade) ? 1 : 0);
if (fade) {
_fadingIn = false;
_fadingOut = true;
_fadeTime = 0;
} else {
stopNow();
}
}
void AudioStreamInstance::stopNow() {
debugC(1, kDebugAudio, "stopNow()");
_stopped = true;
}
void AudioStreamInstance::setVolume(int32 volume) {
debugC(1, kDebugAudio, "setVolume(%d)", volume);
_volume = volume;
_mixer->setChannelVolume(_handle, volume);
}
AudioStreamPackage::AudioStreamPackage(ToonEngine *vm) : _vm(vm) {
_indexBuffer = 0;
}
bool AudioStreamPackage::loadAudioPackage(Common::String indexFile, Common::String streamFile) {
debugC(4, kDebugAudio, "loadAudioPackage(%s, %s)", indexFile.c_str(), streamFile.c_str());
uint32 size = 0;
uint8 *fileData = _vm->resources()->getFileData(indexFile, &size);
if (!fileData)
return false;
_indexBuffer = new uint32[size / 4];
memcpy(_indexBuffer, fileData, size);
_file = _vm->resources()->openFile(streamFile);
if (!_file)
return false;
return true;
}
void AudioStreamPackage::getInfo(int32 id, int32 *offset, int32 *size) {
debugC(1, kDebugAudio, "getInfo(%d, offset, size)", id);
*offset = READ_LE_UINT32(_indexBuffer + id);
*size = READ_LE_UINT32(_indexBuffer + id + 1) - READ_LE_UINT32(_indexBuffer + id);
}
Common::SeekableReadStream *AudioStreamPackage::getStream(int32 id, bool ownMemory) {
debugC(1, kDebugAudio, "getStream(%d, %d)", id, (ownMemory) ? 1 : 0);
int32 offset = 0;
int32 size = 0;
getInfo(id, &offset, &size);
if (ownMemory) {
byte *memory = new byte[size];
_file->seek(offset);
_file->read(memory, size);
return new Common::MemoryReadStream(memory, size, DisposeAfterUse::YES);
} else {
return new Common::SeekableSubReadStream(_file, offset, size + offset);
}
}
} // End of namespace Toon