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