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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_included
#define _mixer_h_included
#ifdef COMPRESSED_SOUND_FILE
#include <mad.h>
#endif
typedef uint32 PlayingSoundHandle;
class SoundMixer {
private:
class Channel {
public:
virtual void mix(int16 *data, uint len) = 0;
virtual void destroy() = 0;
};
class Channel_RAW : public Channel {
SoundMixer *_mixer;
void *_ptr;
uint32 _pos;
uint32 _size;
uint32 _fp_speed;
uint32 _fp_pos;
byte _flags;
public:
void mix(int16 *data, uint len);
void destroy();
Channel_RAW(SoundMixer *mixer, void *sound, uint32 size, uint rate, byte flags);
};
#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);
void destroy();
Channel_MP3(SoundMixer *mixer, void *sound, uint size, byte flags);
};
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;
byte _flags;
public:
void mix(int16 *data, uint len);
void destroy();
Channel_MP3_CDMUSIC(SoundMixer *mixer, FILE* file, void *buffer, uint32 buffer_size, mad_timer_t duration);
};
#endif
static void on_generate_samples(void *s, byte *samples, int len);
public:
typedef void PremixProc(void *param, int16 *data, uint len);
uint _output_rate;
int16 *_volume_table;
enum {
NUM_CHANNELS = 16,
};
void *_premix_param;
PremixProc *_premix_proc;
Channel *_channels[NUM_CHANNELS];
PlayingSoundHandle *_handles[NUM_CHANNELS];
int insert(PlayingSoundHandle *handle, Channel *chan);
void uninsert(Channel *chan);
/* start playing a raw sound */
enum {
FLAG_AUTOFREE = 1,
FLAG_UNSIGNED = 2, /* unsigned samples */
FLAG_FILE = 4, /* sound is a FILE * that's read from */
};
int play_raw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags);
#ifdef COMPRESSED_SOUND_FILE
void play_mp3(PlayingSoundHandle *handle, void *sound, uint32 size, byte flags);
void play_mp3_cdtrack(PlayingSoundHandle *handle, FILE* file, void *buffer, uint32 buffer_size, 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);
/* 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);
};
struct MP3OffsetTable { /* Compressed Sound (.SO3) */
int org_offset;
int new_offset;
int num_tags;
int compressed_size;
};
#if 0
typedef enum { /* Mixer types */
MIXER_STANDARD,
MIXER_MP3,
MIXER_MP3_CDMUSIC
} MixerType;
struct MixerChannel { /* Mixer Channel */
void *_sfx_sound;
MixerType type;
union {
struct {
uint32 _sfx_pos;
uint32 _sfx_size;
uint32 _sfx_fp_speed;
uint32 _sfx_fp_pos;
} standard;
#ifdef COMPRESSED_SOUND_FILE
struct {
struct mad_stream stream;
struct mad_frame frame;
struct mad_synth synth;
uint32 silence_cut;
uint32 pos_in_frame;
uint32 position;
uint32 size;
} mp3;
struct {
struct mad_stream stream;
struct mad_frame frame;
struct mad_synth synth;
uint32 pos_in_frame;
uint32 position;
uint32 size;
uint32 buffer_size;
mad_timer_t duration;
bool playing;
FILE *file;
} mp3_cdmusic;
#endif
} sound_data;
void mix(int16 *data, uint32 len);
void clear();
};
#endif
#endif /* _mixer_h_included */
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