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-rw-r--r--engines/kyra/sound_digital.cpp342
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diff --git a/engines/kyra/sound_digital.cpp b/engines/kyra/sound_digital.cpp
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+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2006 The ScummVM project
+ *
+ * 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 "kyra/sound.h"
+
+#include "sound/audiostream.h"
+
+namespace Kyra {
+
+// Thanks to Torbjörn Andersson (eriktorbjorn) for his aud player on which
+// this code is based on
+
+// TODO: cleanup of whole AUDStream
+// FIXME: sound 'stutters' a bit, maybe a problem while converting int8 samples to int16?
+class AUDStream : public Audio::AudioStream {
+public:
+ AUDStream(Common::File *file);
+ ~AUDStream();
+
+ int readBuffer(int16 *buffer, const int numSamples);
+
+ bool isStereo() const { return false; }
+ bool endOfData() const { return _endOfData; }
+
+ int getRate() const { return _rate; }
+private:
+ Common::File *_file;
+ bool _endOfData;
+ int _rate;
+ uint _processedSize;
+ uint _totalSize;
+
+ int _bytesLeft;
+
+ uint8 *_outBuffer;
+ int _outBufferOffset;
+ uint _outBufferSize;
+
+ uint8 *_inBuffer;
+ uint _inBufferSize;
+
+ int readChunk(int16 *buffer, const int maxSamples);
+
+ static const int8 WSTable2Bit[];
+ static const int8 WSTable4Bit[];
+};
+
+const int8 AUDStream::WSTable2Bit[] = { -2, -1, 0, 1 };
+const int8 AUDStream::WSTable4Bit[] = {
+ -9, -8, -6, -5, -4, -3, -2, -1,
+ 0, 1, 2, 3, 4, 5, 6, 8
+};
+
+AUDStream::AUDStream(Common::File *file) : _file(0), _endOfData(true), _rate(0),
+ _processedSize(0), _totalSize(0), _bytesLeft(0), _outBuffer(0),
+ _outBufferOffset(0), _outBufferSize(0), _inBuffer(0), _inBufferSize(0) {
+#if defined(__SYMBIAN32__)
+ // Symbian can't share filehandles between different threads.
+ // So create a new file and seek that to the other filehandles position
+ _file= new File;
+ _file->open(file->name());
+ _file->seek(file->pos());
+#else
+ _file = file;
+#endif
+ _file->incRef();
+
+ _rate = _file->readUint16LE();
+ _totalSize = _file->readUint32LE();
+ // TODO?: add checks
+ int flags = _file->readByte(); // flags
+ int type = _file->readByte(); // type
+
+ if (type == 1 && !flags) {
+ _endOfData = false;
+ } else
+ warning("No AUD file (rate: %d, size: %d, flags: 0x%X, type: %d)", _rate, _totalSize, flags, type);
+}
+
+AUDStream::~AUDStream() {
+ delete [] _outBuffer;
+ delete [] _inBuffer;
+
+ if (_file)
+ _file->decRef();
+#ifdef __SYMBIAN32__
+ delete _file;
+#endif
+}
+
+int AUDStream::readBuffer(int16 *buffer, const int numSamples) {
+ int samplesRead = 0, samplesLeft = numSamples;
+
+ while (samplesLeft > 0 && !_endOfData) {
+ int samples = readChunk(buffer, samplesLeft);
+ samplesRead += samples;
+ samplesLeft -= samples;
+ buffer += samples;
+ }
+
+ return samplesRead;
+}
+
+inline int16 clip8BitSample(int16 sample) {
+ if (sample > 255)
+ return 255;
+ if (sample < 0)
+ return 0;
+ return sample;
+}
+
+int AUDStream::readChunk(int16 *buffer, const int maxSamples) {
+ int samplesProcessed = 0;
+
+ // if no bytes of the old chunk are left, read the next one
+ if (_bytesLeft <= 0) {
+ if (_processedSize > _totalSize) {
+ _endOfData = true;
+ return 0;
+ }
+
+ uint16 size = _file->readUint16LE();
+ uint16 outSize = _file->readUint16LE();
+ uint32 id = _file->readUint32LE();
+
+ assert(id == 0x0000DEAF);
+
+ _processedSize += 8 + size;
+
+ _outBufferOffset = 0;
+ if (size == outSize) {
+ if (outSize > _outBufferSize) {
+ _outBufferSize = outSize;
+ delete [] _outBuffer;
+ _outBuffer = new uint8[_outBufferSize];
+ assert(_outBuffer);
+ }
+
+ _bytesLeft = size;
+
+ _file->read(_outBuffer, _bytesLeft);
+ } else {
+ _bytesLeft = outSize;
+
+ if (outSize > _outBufferSize) {
+ _outBufferSize = outSize;
+ delete [] _outBuffer;
+ _outBuffer = new uint8[_outBufferSize];
+ assert(_outBuffer);
+ }
+
+ if (size > _inBufferSize) {
+ _inBufferSize = size;
+ delete [] _inBuffer;
+ _inBuffer = new uint8[_inBufferSize];
+ assert(_inBuffer);
+ }
+
+ if (_file->read(_inBuffer, size) != size) {
+ _endOfData = true;
+ return 0;
+ }
+
+ int16 curSample = 0;
+ byte code = 0;
+ int8 count = 0;
+ uint16 input = 0;
+ int j = 0;
+ int i = 0;
+
+ while (outSize > 0) {
+ input = _inBuffer[i++] << 2;
+ code = (input >> 8) & 0xff;
+ count = (input & 0xff) >> 2;
+
+ switch (code) {
+ case 2:
+ if (count & 0x20) {
+ /* NOTE: count is signed! */
+ count <<= 3;
+ curSample += (count >> 3);
+ _outBuffer[j++] = curSample & 0xFF;
+ outSize--;
+ } else {
+ for (; count >= 0; count--) {
+ _outBuffer[j++] = _inBuffer[i++];
+ outSize--;
+ }
+ curSample = _inBuffer[i - 1];
+ }
+ break;
+ case 1:
+ for (; count >= 0; count--) {
+ code = _inBuffer[i++];
+
+ curSample += WSTable4Bit[code & 0x0f];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample;
+
+ curSample += WSTable4Bit[code >> 4];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample;
+
+ outSize -= 2;
+ }
+ break;
+ case 0:
+ for (; count >= 0; count--) {
+ code = (uint8)_inBuffer[i++];
+
+ curSample += WSTable2Bit[code & 0x03];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample & 0xFF;
+
+ curSample += WSTable2Bit[(code >> 2) & 0x03];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample & 0xFF;
+
+ curSample += WSTable2Bit[(code >> 4) & 0x03];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample & 0xFF;
+
+ curSample += WSTable2Bit[(code >> 6) & 0x03];
+ curSample = clip8BitSample(curSample);
+ _outBuffer[j++] = curSample & 0xFF;
+
+ outSize -= 4;
+ }
+ break;
+ default:
+ for (; count >= 0; count--) {
+ _outBuffer[j++] = curSample & 0xFF;
+ outSize--;
+ }
+ }
+ }
+ }
+ }
+
+ // copies the chunk data to the output buffer
+ if (_bytesLeft > 0) {
+ int samples = MIN(_bytesLeft, maxSamples);
+ samplesProcessed += samples;
+ _bytesLeft -= samples;
+
+ while (samples--) {
+ int16 sample = (int8)_outBuffer[_outBufferOffset++];
+ *buffer++ = (sample << 8) ^ 0x8000;
+ }
+ }
+
+ return samplesProcessed;
+}
+
+#pragma mark -
+
+SoundDigital::SoundDigital(KyraEngine *vm, Audio::Mixer *mixer) : _vm(vm), _mixer(mixer), _sounds() {}
+
+SoundDigital::~SoundDigital() {
+ for (int i = 0; i < SOUND_STREAMS; ++i) {
+ stopSound(i);
+ }
+}
+
+bool SoundDigital::init() {
+ return true;
+}
+
+int SoundDigital::playSound(Common::File *fileHandle, int channel) {
+ Sound *use = 0;
+ if (channel != -1 && channel < SOUND_STREAMS) {
+ stopSound(channel);
+ use = &_sounds[channel];
+ } else {
+ for (int i = 0; i < SOUND_STREAMS; ++i) {
+ if (!_sounds[i].fileHandle) {
+ use = &_sounds[i];
+ break;
+ }
+ }
+
+ if (!use) {
+ warning("no free sound channel");
+ return -1;
+ }
+ }
+
+ Audio::AudioStream *stream = new AUDStream(fileHandle);
+ if (stream->endOfData()) {
+ delete stream;
+ delete fileHandle;
+
+ return -1;
+ }
+
+ // TODO: set correct sound type from channel id
+ _mixer->playInputStream(Audio::Mixer::kPlainSoundType, &use->handle, stream);
+ use->fileHandle = fileHandle;
+
+ return use - _sounds;
+}
+
+bool SoundDigital::isPlaying(int channel) {
+ if (channel == -1)
+ return false;
+
+ assert(channel >= 0 && channel < SOUND_STREAMS);
+
+ return _mixer->isSoundHandleActive(_sounds[channel].handle);
+}
+
+void SoundDigital::stopSound(int channel) {
+ if (isPlaying(channel)) {
+ _mixer->stopHandle(_sounds[channel].handle);
+ }
+
+ if (_sounds[channel].fileHandle) {
+ delete _sounds[channel].fileHandle;
+ _sounds[channel].fileHandle = 0;
+ }
+}
+
+} // end of namespace Kyra
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