mirror of
https://github.com/libretro/scummvm.git
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155 lines
4.1 KiB
C++
155 lines
4.1 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2001 Ludvig Strigeus
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* Copyright (C) 2001-2003 The ScummVM project
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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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* 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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* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#ifndef MIXER_H
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#define MIXER_H
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#include "stdafx.h"
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#if defined(HAVE_CONFIG_H)
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#include "config.h"
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#endif
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#ifdef USE_MAD
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#include <mad.h>
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#endif
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#ifdef USE_VORBIS
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#include <vorbis/vorbisfile.h>
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#endif
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#include "common/scummsys.h"
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#include "common/system.h"
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typedef uint32 PlayingSoundHandle;
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class Channel;
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class File;
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class SoundMixer {
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friend class Channel;
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public:
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typedef void PremixProc (void *param, int16 *data, uint len);
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enum {
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NUM_CHANNELS = 16
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};
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enum {
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// Do *NOT* change any of these flags without looking at the code in mixer.cpp
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FLAG_UNSIGNED = 1 << 0, // unsigned samples (default: signed)
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FLAG_STEREO = 1 << 1, // sound is in stereo (default: mono)
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FLAG_16BITS = 1 << 2, // sound is 16 bits wide (default: 8bit)
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FLAG_AUTOFREE = 1 << 3, // sound buffer is freed automagically at the end of playing
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FLAG_REVERSE_STEREO = 1 << 4, // reverse the left and right stereo channel
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FLAG_LOOP = 1 << 5 // loop the audio
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};
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private:
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OSystem *_syst;
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OSystem::MutexRef _mutex;
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void *_premixParam;
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PremixProc *_premixProc;
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uint _outputRate;
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int _globalVolume;
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int _musicVolume;
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bool _paused;
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Channel *_channels[NUM_CHANNELS];
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public:
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SoundMixer();
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~SoundMixer();
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// start playing a raw sound
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int playRaw(PlayingSoundHandle *handle, void *sound, uint32 size, uint rate, byte flags,
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int id = -1, uint32 loopStart = 0, uint32 loopEnd = 0);
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#ifdef USE_MAD
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int playMP3(PlayingSoundHandle *handle, File *file, uint32 size);
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int playMP3CDTrack(PlayingSoundHandle *handle, File *file, mad_timer_t duration);
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#endif
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#ifdef USE_VORBIS
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int playVorbis(PlayingSoundHandle *handle, OggVorbis_File *ov_file, int duration, bool is_cd_track);
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#endif
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/** Premix procedure, useful when using fmopl adlib */
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void setupPremix(void * param, PremixProc * proc);
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/** stop all currently playing sounds */
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void stopAll();
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/** stop playing the given channel */
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void stop(int channel);
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/** stop playing the sound with given ID */
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void stopID(int id);
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/** stop playing the channel for the given handle */
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void stopHandle(PlayingSoundHandle handle);
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/** Start a new stream. */
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int newStream(void *sound, uint32 size, uint rate, byte flags, uint32 buffer_size);
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/** Append to an existing stream. */
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void appendStream(int index, void *sound, uint32 size);
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/** Mark a stream as finished - it will play all its remaining data, then stop. */
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void endStream(int index);
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/** Check whether any SFX channel is active.*/
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bool hasActiveSFXChannel();
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/** bind to the OSystem object => mixer will be
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* invoked automatically when samples need
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* to be generated */
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bool bindToSystem(OSystem *syst);
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/** pause - unpause */
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void pause(bool paused);
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/** set the global volume, 0-256 */
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void setVolume(int volume);
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/** query the global volume, 0-256 */
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int getVolume() const { return _globalVolume; }
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/** set the music volume, 0-256 */
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void setMusicVolume(int volume);
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/** query the music volume, 0-256 */
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int getMusicVolume() const { return _musicVolume; }
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/** query the output rate in kHz */
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uint getOutputRate() const { return _outputRate; }
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private:
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int insertChannel(PlayingSoundHandle *handle, Channel *chan);
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/** mix */
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void mix(int16 * buf, uint len);
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static void mixCallback(void *s, byte *samples, int len);
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};
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#endif
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