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sound.cpp
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sound.cpp
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#include "../sound.h"
#include <SDL.h>
#include "mixer/SDL_mixer.h"
#include "util/debug.h"
Sound::Sound():
own(NULL){
}
/* create from wav file (riff header + pcm) */
Sound::Sound(const char * data, int length):
own(NULL){
SDL_RWops * ops = SDL_RWFromConstMem(data, length);
this->data.chunk = Mix_LoadWAV_RW(ops, 1);
own = new int;
*own = 1;
}
/* load from path */
Sound::Sound(const std::string & path) throw (LoadException):
own(NULL){
data.chunk = Mix_LoadWAV(path.c_str());
if (!data.chunk){
printf("Can't load sound %s\n", path.c_str());
// throw LoadException("Could not load sound " + path);
} else {
own = new int;
*own = 1;
}
}
void Sound::initialize(){
// int audio_rate = 22050;
/* allegro uses 44100 by default with alsa9 */
int audio_rate = Info.frequency;
// int audio_rate = 22050;
Uint16 audio_format = AUDIO_S16;
// Uint16 audio_format = MIX_DEFAULT_FORMAT;
int audio_channels = 2;
int audio_buffers = 4096;
// int audio_buffers = 44100;
if (Mix_OpenAudio(audio_rate, audio_format, audio_channels, audio_buffers)) {
printf("Unable to open audio: %s!\n", Mix_GetError());
// exit(1);
}
/* use the frequency enforced by the audio system */
Mix_QuerySpec(&audio_rate, &audio_format, &audio_channels);
Info.frequency = audio_rate;
Info.channels = audio_channels;
Info.format = audio_format;
Global::debug(0) << "Opened audio at rate " << audio_rate << " channels " << audio_channels << " format " << audio_format << std::endl;
}
void Sound::uninitialize(){
Mix_CloseAudio();
}
void Sound::play(){
if (data.chunk != NULL){
Mix_VolumeChunk(data.chunk, (int) scale(MIX_MAX_VOLUME));
Mix_PlayChannel(-1, data.chunk, 0);
}
}
void Sound::play(double volume, int pan){
if (data.chunk != NULL){
Mix_VolumeChunk(data.chunk, (int) scale(volume * MIX_MAX_VOLUME));
Mix_PlayChannel(-1, data.chunk, 0);
}
}
void Sound::playLoop(){
if (data.chunk != NULL){
Mix_VolumeChunk(data.chunk, (int) scale(MIX_MAX_VOLUME));
Mix_PlayChannel(-1, data.chunk, -1);
}
}
void Sound::destroy(){
if (own){
*own -= 1;
if ( *own == 0 ){
delete own;
if (data.chunk != NULL){
Mix_FreeChunk(data.chunk);
}
own = NULL;
}
}
}
void Sound::stop(){
if (data.channel != -1){
Mix_HaltChannel(data.channel);
}
}

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