diff options
Diffstat (limited to 'src/audio.c')
| -rw-r--r-- | src/audio.c | 45 |
1 files changed, 22 insertions, 23 deletions
diff --git a/src/audio.c b/src/audio.c index cfe6939..fd54041 100644 --- a/src/audio.c +++ b/src/audio.c @@ -3,7 +3,7 @@ * * Moo like a cow * - * (c) 2008 Thomas White <taw27@srcf.ucam.org> + * (c) 2008-2009 Thomas White <taw@bitwiz.org.uk> * * This file is part of OpenMooCow - accelerometer moobox simulator * @@ -49,28 +49,28 @@ static void audio_mix(void *data, Uint8 *stream8, int len) { int j; Sint16 *stream = (Sint16 *)stream8; Sint16 samp; - + len /= 2; /* Number of samples to write */ - + for ( j=0; j<len; j++ ) { - + stream[j] = 0; - + if ( a->moo_pos < a->moo_len ) { samp = a->moo_buf[a->moo_pos++]; stream[j] += samp; } else { a->mootex = 0; } - + } - + } void audio_trigger_moo() { AudioContext *a = audio_context; - + if ( a == NULL ) { /* Try to open the audio again */ printf("Trying to open the audio again...\n"); @@ -85,7 +85,7 @@ void audio_trigger_moo() { printf("Moo!\n"); a->mootex = 1; - + if ( a->moo_pos == a->moo_len ) { a->moo_pos = 0; } @@ -94,19 +94,19 @@ void audio_trigger_moo() { /* SDL audio initial setup */ void audio_setup() { - + AudioContext *a; SDL_AudioSpec fmt; SDL_AudioSpec wave; Uint8 *data; Uint32 dlen; SDL_AudioCVT cvt; - + /* Create audio context */ a = malloc(sizeof(AudioContext)); assert(a != NULL); a->mootex = 0; - + /* 16-bit mono audio at 44.1 kHz */ fmt.freq = 44100; fmt.format = AUDIO_S16; @@ -115,13 +115,13 @@ void audio_setup() { fmt.callback = audio_mix; fmt.userdata = a; fmt.silence = 0; - + if ( SDL_OpenAudio(&fmt, NULL) < 0 ) { fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError()); free(a); return; } - + if ( SDL_LoadWAV(DATADIR"/openmoocow/moo.wav", &wave, &data, &dlen) == NULL ) { fprintf(stderr, "Couldn't load moo sound: %s\n", SDL_GetError()); free(a); @@ -138,27 +138,26 @@ void audio_setup() { cvt.len = dlen; SDL_ConvertAudio(&cvt); SDL_FreeWAV(data); - + a->moo_len = cvt.len_cvt/2 - 2; /* Convert bytes to samples */ a->moo_pos = a->moo_len; /* Play nothing to start with */ a->moo_buf = (Sint16 *)cvt.buf; - + audio_context = a; - + SDL_PauseAudio(0); - + } void audio_shutdown() { AudioContext *a = audio_context; - + if ( a == NULL ) return; - + SDL_CloseAudio(); - + /* Now this can be freed */ free(a); - -} +} |