OPENGL: Merged from trunk, from rev 52105 to 53396.

This includes an rather hacky attempt to merge all the recent gp2x backend
changes into the branch. I suppose the gp2x backend and probably all new
backends, i.e. gph, dingux etc., might not compile anymore.

Since I have no way of testing those it would be nice if porters could look
into getting those up to speed in this branch.

svn-id: r53399

1 files changed, 480 insertions, 0 deletions

diff --git a/engines/toon/audio.cpp b/engines/toon/audio.cpp
new file mode 100644
index 0000000000..496d626201
--- /dev/null
+++ b/engines/toon/audio.cpp
@@ -0,0 +1,480 @@
+/* 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;
+
+	Common::SeekableReadStream *srs = _vm->resources()->openFile(path);
+	if (!srs)
+		return;
+
+	// 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;
+	}
+
+	
+	//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;
+	_musicAttenuation = 1000;
+
+	// 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;
+	_soundType = soundType;
+	_musicAttenuation = 1000; // max volume
+	_mixer->playStream(soundType, &_handle, this);
+	handleFade(0);
+}
+
+void AudioStreamInstance::handleFade(int numSamples) {
+	debugC(5, kDebugAudio, "handleFade(%d)", numSamples);
+
+	// Fading enabled only for music
+	if (_soundType != Audio::Mixer::kMusicSoundType) 
+		return;
+
+	int32 finalVolume = _volume;
+
+	if (_fadingOut) {
+		_fadeTime += numSamples;
+
+		if (_fadeTime > 40960) {
+			_fadeTime = 40960;
+			stopNow();
+			_fadingOut = false;
+		}
+		finalVolume = _volume - _fadeTime * _volume / 40960;
+	} else {
+		if (_fadingIn) {
+			_fadeTime += numSamples;
+			if (_fadeTime > 40960) {
+				_fadeTime = 40960;
+				_fadingIn = false;
+			}
+
+			finalVolume = _volume * _fadeTime / 40960;
+		}
+	}
+
+	// the music is too loud when someone is talking
+	// smoothing to avoid big volume changes
+	if (_man->voiceStillPlaying()) {
+		_musicAttenuation -= numSamples >> 4;
+		if (_musicAttenuation < 250)
+			_musicAttenuation = 250;
+	} else {
+		_musicAttenuation += numSamples >> 5;
+		if (_musicAttenuation > 1000) 
+			_musicAttenuation = 1000;
+	}
+
+
+	_mixer->setChannelVolume(_handle, finalVolume * _musicAttenuation / 1000);
+
+}
+
+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;
+}
+
+AudioStreamPackage::~AudioStreamPackage() {
+	delete[] _indexBuffer;
+}
+
+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;
+
+	delete[] _indexBuffer;
+
+	_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
+