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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2003 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
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#ifdef USE_MAD
#include <mad.h>
#endif
#ifdef USE_VORBIS
#include <vorbis/vorbisfile.h>
#endif
#include "stdafx.h"
#include "common/scummsys.h"
#include "common/system.h"
typedef uint32 PlayingSoundHandle;
class Channel;
class File;
class SoundMixer {
friend class Channel;
public:
typedef void PremixProc (void *param, int16 *data, uint len);
enum {
NUM_CHANNELS = 16
};
enum {
// Do *NOT* change any of these flags without looking at the code in mixer.cpp
FLAG_UNSIGNED = 1 << 0, // unsigned samples (default: signed)
FLAG_STEREO = 1 << 1, // sound is in stereo (default: mono)
FLAG_16BITS = 1 << 2, // sound is 16 bits wide (default: 8bit)
FLAG_AUTOFREE = 1 << 3, // sound buffer is freed automagically at the end of playing
FLAG_REVERSE_STEREO = 1 << 4, // reverse the left and right stereo channel
FLAG_LOOP = 1 << 5 // loop the audio
};
private:
OSystem *_syst;
OSystem::MutexRef _mutex;
void *_premixParam;
PremixProc *_premixProc;
uint _outputRate;
int _globalVolume;
int _musicVolume;
bool _paused;
Channel *_channels[NUM_CHANNELS];
public:
SoundMixer();
~SoundMixer();
// start playing a raw sound
int playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags, int id = -1);
#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);
/** stop all currently playing sounds */
void stopAll();
/** stop playing the given channel */
void stop(int channel);
/** stop playing the sound with given ID */
void stopID(int id);
/** stop playing the channel for the given handle */
void stopHandle(PlayingSoundHandle handle);
/** Start a new stream. */
int newStream(void *sound, uint32 size, uint rate, byte flags, uint32 buffer_size);
/** Append to an existing stream. */
void appendStream(int index, void *sound, uint32 size);
/** Mark a stream as finished - it will play all its remaining data, then stop. */
void endStream(int index);
/** Check whether any SFX channel is active.*/
bool hasActiveSFXChannel();
/** Check whether the specified channel is active. */
bool isChannelActive(int index);
/** Check whether the specified channel is in use. */
bool isChannelUsed(int index);
/** bind to the OSystem object => mixer will be
* invoked automatically when samples need
* to be generated */
bool bindToSystem(OSystem *syst);
/** pause - unpause */
void pause(bool paused);
/** set the global volume, 0-256 */
void setVolume(int volume);
/** query the global volume, 0-256 */
int getVolume() const { return _globalVolume; }
/** set the music volume, 0-256 */
void setMusicVolume(int volume);
/** query the music volume, 0-256 */
int getMusicVolume() const { return _musicVolume; }
/** query the output rate in kHz */
uint getOutputRate() const { return _outputRate; }
private:
int insertChannel(PlayingSoundHandle *handle, Channel *chan);
/** mix */
void mix(int16 * buf, uint len);
static void mixCallback(void *s, byte *samples, int len);
};
#endif
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