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/* 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.
*
*/
#ifndef SOUND_MP3_PSP_H
#define SOUND_MP3_PSP_H
#include "common/ptr.h"
#include "common/types.h"
#include "common/scummsys.h"
namespace Common {
class SeekableReadStream;
}
namespace Audio {
class AudioStream;
class SeekableAudioStream;
class Mp3PspStream : public SeekableAudioStream {
protected:
enum State {
MP3_STATE_INIT, // Need to init the decoder
MP3_STATE_READY, // ready for processing data
MP3_STATE_EOS // end of data reached (may need to loop)
};
#define MAX_SAMPLES_PER_FRAME 1152 * 2 /* x2 for stereo */
int16 _pcmSamples[MAX_SAMPLES_PER_FRAME] __attribute__((aligned(64))); // samples to output PCM data into
byte _codecInBuffer[3072] __attribute__((aligned(64))); // the codec always needs alignment
unsigned long _codecParams[65]__attribute__((aligned(64))); // TODO: change to struct
Common::DisposablePtr<Common::SeekableReadStream> _inStream;
uint32 _pcmLength; // how many pcm samples we have for this type of file (x2 this for stereo)
uint _posInFrame; // position in frame
State _state; // what state the stream is in
Timestamp _length;
uint32 _sampleRate;
bool _stereo;
mad_timer_t _totalTime;
mad_stream _stream; //
mad_header _header; // This is all we need from libmad
static bool _decoderInit; // has the decoder been initialized
static bool _decoderFail; // has the decoder failed to load
enum {
BUFFER_SIZE = 5 * 8192
};
// This buffer contains a slab of input data
byte _buf[BUFFER_SIZE + MAD_BUFFER_GUARD];
void decodeMP3Data();
void readMP3DataIntoBuffer();
static bool loadStartAudioModule(const char *modname, int partition);
int initStream();
void findValidHeader();
void deinitStream();
void updatePcmLength();
// to init and uninit ME decoder
static bool initDecoder();
static bool stopDecoder();
// ME functions for stream
bool initStreamME();
void releaseStreamME();
public:
Mp3PspStream(Common::SeekableReadStream *inStream, DisposeAfterUse::Flag dispose);
~Mp3PspStream();
// This function avoids having to create streams when it's not possible
static inline bool isOkToCreateStream() {
if (_decoderFail) // fatal failure
return false;
if (!_decoderInit) // if we're not initialized
if (!initDecoder()) // check if we failed init
return false;
return true;
}
int readBuffer(int16 *buffer, const int numSamples);
bool endOfData() const { return _state == MP3_STATE_EOS; }
bool isStereo() const { return _stereo; }
int getRate() const { return _sampleRate; }
bool seek(const Timestamp &where);
Timestamp getLength() const { return _length; }
};
} // End of namespace Audio
#endif // #ifndef SOUND_MP3_PSP_H
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