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/*
* This file is part of the MLV Library.
*
* Copyright (C) 2010,2011,2012 Adrien Boussicault, Marc Zipstein
*
*
* This Library 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 3 of the License, or
* (at your option) any later version.
*
* This Library 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 Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "MLV_audio.h"
#include "warning_error.h"
#include "memory_management.h"
#include "data_structure.h"
#include "platform.h"
#if defined( OS_WINDOWS )
# include <SDL/SDL_mixer.h>
#elif defined( OS_APPLE )
# include <SDL_mixer/SDL_mixer.h>
#else
# include <SDL/SDL_mixer.h>
#endif
#include <glib.h>
extern DataMLV* MLV_data;
struct _MLV_Music {
Mix_Music* music;
};
struct _MLV_Sound {
Mix_Chunk* sample;
};
struct _MLV_Playlist {
GList* list_music;
};
#define MLV_AUDIO_BUFFER_SIZE 1024
#define MLV_AUDIO_STEREO 2
#define MLV_AUDIO_NUMBER_OF_MIXING_CHANEL 16
int init_audio( int buffer_size ){
int result = Mix_OpenAudio(
MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT, MLV_AUDIO_STEREO, buffer_size
);
if( !result ){
Mix_AllocateChannels(MLV_AUDIO_NUMBER_OF_MIXING_CHANEL);
}
return result;
}
void MLV_change_number_of_parallel_sounds( unsigned int n ){
if( ! n ){
fprintf( stderr, "Incorrect parameter for MLV_change_number_playing_parallel_sounds. The number of parrallel sound can't be null." );
exit(1);
}
Mix_AllocateChannels( n );
}
int MLV_init_audio(){
return init_audio( MLV_AUDIO_BUFFER_SIZE ); // If the sound are not well
// former, increse this value.
// If the sound have some lags, the you have
// to decrease this value.
}
int MLV_change_audio_buffer_size( int buffer_size ){
MLV_free_audio();
return init_audio( buffer_size );
}
void MLV_free_audio(){
Mix_HaltChannel(-1);
Mix_HaltMusic();
Mix_CloseAudio();
}
MLV_Music* MLV_load_music( const char* file_music ){
MLV_Music* result = MLV_MALLOC( 1, MLV_Music );
result->music= Mix_LoadMUS( file_music );
if(! result->music) {
MLV_FREE( result, MLV_Music );
result = NULL;
}
return result;
}
void MLV_free_music( MLV_Music* music ){
if( music ){
Mix_FreeMusic( music->music );
MLV_FREE( music, MLV_Music );
}
}
void MLV_play_music( const MLV_Music* music, float volume, int loop ){
Mix_VolumeMusic( volume * MIX_MAX_VOLUME );
MLV_stop_music();
if( loop ) Mix_PlayMusic( music->music, loop-1 );
}
void MLV_stop_music(){
Mix_HaltMusic();
}
MLV_Sound* MLV_load_sound( const char* file_sound ){
MLV_Sound* result = MLV_MALLOC( 1, MLV_Sound );
result->sample = Mix_LoadWAV( file_sound );
if(! result->sample ){
MLV_FREE( result, MLV_Sound );
result = NULL;
}else{
Mix_VolumeChunk( result->sample, MIX_MAX_VOLUME );
}
return result;
}
void MLV_free_sound( MLV_Sound* sound ){
if( sound ){
Mix_FreeChunk( sound->sample );
MLV_FREE( sound, MLV_Sound );
}
}
void MLV_play_sound( const MLV_Sound* sound, float volume ){
int channel = Mix_PlayChannel( -1, sound->sample, 0 );
Mix_Volume(channel, volume * MIX_MAX_VOLUME);
}
void MLV_stop_all_sounds(){
Mix_HaltChannel(-1);
}
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