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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001/2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef MIXER_H
#define MIXER_H
#include <stdio.h>
#ifdef USE_MAD
#include <mad.h>
#endif
#ifdef USE_VORBIS
#include <vorbis/vorbisfile.h>
#endif
#include "common/scummsys.h"
#include "common/system.h"
typedef uint32 PlayingSoundHandle;
class File;
class SoundMixer {
private:
class Channel {
public:
bool _toBeDestroyed;
int _id;
virtual void mix(int16 *data, uint len) = 0;
void destroy() {
_toBeDestroyed = true;
}
virtual void realDestroy() = 0;
virtual void append(void *sound, uint32 size);
virtual bool soundFinished();
};
class ChannelRaw : public Channel {
SoundMixer * _mixer;
void * _ptr;
uint32 _pos;
uint32 _size;
uint32 _fpSpeed;
uint32 _fpPos;
uint32 _realSize, _rate;
byte _flags;
void *_loop_ptr;
uint32 _loop_size;
public:
ChannelRaw(SoundMixer * mixer, void * sound, uint32 size, uint rate, byte flags, int id);
void mix(int16 * data, uint len);
void realDestroy();
};
class ChannelStream : public Channel {
SoundMixer * _mixer;
byte * _ptr;
byte * _endOfData;
byte * _endOfBuffer;
byte * _pos;
uint32 _fpSpeed;
uint32 _fpPos;
uint32 _bufferSize;
uint32 _rate;
int32 _timeOut;
int32 _setTimeOut;
byte _flags;
public:
ChannelStream(SoundMixer * mixer, void * sound, uint32 size, uint rate, byte flags, int32 timout, int32 buffer_size);
void append(void * sound, uint32 size);
void mix(int16 * data, uint len);
void realDestroy();
};
#ifdef USE_MAD
class ChannelMP3 : public Channel {
SoundMixer * _mixer;
void *_ptr;
struct mad_stream _stream;
struct mad_frame _frame;
struct mad_synth _synth;
uint32 _silenceCut;
uint32 _posInFrame;
uint32 _position;
uint32 _size;
byte _flags;
public:
ChannelMP3(SoundMixer * mixer, void *sound, uint size, byte flags);
void mix(int16 * data, uint len);
void realDestroy();
};
class ChannelMP3CDMusic:public Channel {
SoundMixer * _mixer;
void * _ptr;
struct mad_stream _stream;
struct mad_frame _frame;
struct mad_synth _synth;
uint32 _posInFrame;
uint32 _size;
uint32 _bufferSize;
mad_timer_t _duration;
File * _file;
bool _initialized;
public:
ChannelMP3CDMusic(SoundMixer * mixer, File * file, mad_timer_t duration);
void mix(int16 * data, uint len);
void realDestroy();
bool soundFinished();
};
#endif
#ifdef USE_VORBIS
class ChannelVorbis : public Channel {
SoundMixer * _mixer;
OggVorbis_File * _ov_file;
int _end_pos;
bool _eof_flag, _is_cd_track;
public:
ChannelVorbis(SoundMixer * mixer, OggVorbis_File * ov_file, int duration, bool is_cd_track);
void mix(int16 * data, uint len);
void realDestroy();
bool soundFinished();
};
#endif
static void onGenerateSamples(void * s, byte * samples, int len);
public:
typedef void PremixProc (void * param, int16 * data, uint len);
OSystem * _syst;
void * _mutex;
uint _outputRate;
int16 * _volumeTable;
int _musicVolume;
bool _paused;
enum {
NUM_CHANNELS = 16
};
void * _premixParam;
PremixProc * _premixProc;
Channel * _channels[NUM_CHANNELS];
PlayingSoundHandle * _handles[NUM_CHANNELS];
int _beginSlots;
SoundMixer();
~SoundMixer();
int insertAt(PlayingSoundHandle * handle, int index, Channel * chan);
void append(void * data, uint32 len);
void unInsert(Channel * chan);
void beginSlots(int index);
// start playing a raw sound
enum {
// Do *NOT* change any of these flags without looking at the code in mixer.cpp
FLAG_UNSIGNED = 1, // unsigned samples
FLAG_STEREO = 2, // sound is in stereo
FLAG_16BITS = 4, // sound is 16 bits wide
FLAG_AUTOFREE = 8, // sound buffer is freed automagically at the end of playing
FLAG_FILE = 16, // sound is a FILE * that's read from
FLAG_REVERSE_STEREO = 32, // sound should be reverse stereo
FLAG_LOOP = 64 // loop the audio
};
int playRaw(PlayingSoundHandle * handle, void * sound, uint32 size, uint rate, byte flags);
int playRaw(PlayingSoundHandle * handle, void * sound, uint32 size, uint rate, byte flags, int id);
int playStream(PlayingSoundHandle * handle, int index, void * sound, uint32 size, uint rate,
byte flags, int32 timeout = 3, int32 buffer_size = 2000000);
#ifdef USE_MAD
int playMP3(PlayingSoundHandle * handle, void * sound, uint32 size, byte flags);
int playMP3CDTrack(PlayingSoundHandle * handle, File * file, mad_timer_t duration);
#endif
#ifdef USE_VORBIS
int playVorbis(PlayingSoundHandle * handle, OggVorbis_File * ov_file, int duration, bool is_cd_track);
#endif
/* Premix procedure, useful when using fmopl adlib */
void setupPremix(void * param, PremixProc * proc);
/* mix */
void mix(int16 * buf, uint len);
/* stop all currently playing sounds */
void stopAll();
/* stop playing a specific sound */
void stop(int index);
/* append to existing sound */
int append(int index, void * sound, uint32 size, uint rate, byte flags);
/* is any channel active? */
bool hasActiveChannel();
/* bind to the OSystem object => mixer will be
* invoked automatically when samples need
* to be generated */
bool bindToSystem(OSystem *syst);
/* set the volume, 0-256 */
void setVolume(int volume);
void setMusicVolume(int volume);
/* pause - unpause */
void pause(bool paused);
};
struct MP3OffsetTable { /* Compressed Sound (.SO3) */
int org_offset;
int new_offset;
int num_tags;
int compressed_size;
};
#endif
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