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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
#ifdef COMPRESSED_SOUND_FILE
#include <mad.h>
#endif
typedef uint32 PlayingSoundHandle;
class SoundMixer {
private:
class Channel {
public:
bool _to_be_destroyed;
virtual void mix(int16 *data, uint len) = 0;
void destroy() {
_to_be_destroyed = true;
} virtual void real_destroy() = 0;
virtual void append(void *sound, uint32 size);
#ifdef COMPRESSED_SOUND_FILE
virtual bool sound_finished();
#endif
};
class Channel_RAW:public Channel {
SoundMixer *_mixer;
void *_ptr;
uint32 _pos;
uint32 _size;
uint32 _fp_speed;
uint32 _fp_pos;
uint32 _realsize, _rate;
byte _flags;
public:
void mix(int16 *data, uint len);
Channel_RAW(SoundMixer *mixer, void *sound, uint32 size, uint rate, byte flags);
void real_destroy();
};
class Channel_STREAM:public Channel {
SoundMixer *_mixer;
byte *_ptr;
byte *_end_of_data;
byte *_pos;
uint32 _fp_speed;
uint32 _fp_pos;
uint32 _buffer_size;
uint32 _rate;
byte _flags;
public:
void append(void *sound, uint32 size);
void mix(int16 *data, uint len);
Channel_STREAM(SoundMixer *mixer, void *sound, uint32 size, uint rate, byte flags);
void real_destroy();
};
#ifdef COMPRESSED_SOUND_FILE
class Channel_MP3:public Channel {
SoundMixer *_mixer;
void *_ptr;
struct mad_stream _stream;
struct mad_frame _frame;
struct mad_synth _synth;
uint32 _silence_cut;
uint32 _pos_in_frame;
uint32 _position;
uint32 _size;
byte _flags;
public:
void mix(int16 *data, uint len);
Channel_MP3(SoundMixer *mixer, void *sound, uint size, byte flags);
void real_destroy();
};
class Channel_MP3_CDMUSIC:public Channel {
SoundMixer *_mixer;
void *_ptr;
struct mad_stream _stream;
struct mad_frame _frame;
struct mad_synth _synth;
uint32 _pos_in_frame;
uint32 _size;
uint32 _buffer_size;
mad_timer_t _duration;
FILE *_file;
bool _initialized;
public:
void mix(int16 *data, uint len);
Channel_MP3_CDMUSIC(SoundMixer *mixer, FILE * file, mad_timer_t duration);
void real_destroy();
bool sound_finished();
};
#endif
static void on_generate_samples(void *s, byte *samples, int len);
public:
typedef void PremixProc (void *param, int16 *data, uint len);
OSystem *_syst;
void *_mutex;
uint _output_rate;
int16 *_volume_table;
int _music_volume;
bool _paused;
enum {
NUM_CHANNELS = 16,
};
void *_premix_param;
PremixProc *_premix_proc;
Channel *_channels[NUM_CHANNELS];
PlayingSoundHandle *_handles[NUM_CHANNELS];
int insert_at(PlayingSoundHandle *handle, int index, Channel * chan);
void append(void *data, uint32 len);
void uninsert(Channel * chan);
/* 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 */
};
int play_raw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags);
int play_stream(PlayingSoundHandle *handle, int index, void *sound, uint32 size, uint rate,
byte flags);
#ifdef COMPRESSED_SOUND_FILE
int play_mp3(PlayingSoundHandle *handle, void *sound, uint32 size, byte flags);
int play_mp3_cdtrack(PlayingSoundHandle *handle, FILE * file, mad_timer_t duration);
#endif
/* Premix procedure, useful when using fmopl adlib */
void setup_premix(void *param, PremixProc *proc);
/* mix */
void mix(int16 *buf, uint len);
/* stop all currently playing sounds */
void stop_all();
/* stop playing a specific sound */
void stop(PlayingSoundHandle psh);
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 has_active_channel();
/* bind to the OSystem object => mixer will be
* invoked automatically when samples need
* to be generated */
bool bind_to_system(OSystem *syst);
/* set the volume, 0-256 */
void set_volume(int volume);
void set_music_volume(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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