121 lines
2.2 KiB
C
121 lines
2.2 KiB
C
/*
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** thinlib (c) 2001 Matthew Conte (matt@conte.com)
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**
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**
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** tl_sound.c
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**
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** sound driver
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**
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** $Id: $
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*/
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#include "tl_types.h"
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#include "tl_sound.h"
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#include "tl_sb.h"
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#include "tl_log.h"
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typedef struct snddriver_s
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{
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const char *name;
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int (*init)(int *sample_rate, int *frag_size, int *format);
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void (*shutdown)(void);
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int (*start)(audio_callback_t callback, void *user_data);
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void (*stop)(void);
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void (*setrate)(int sample_rate);
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audio_callback_t callback;
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void *user_data;
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} snddriver_t;
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static snddriver_t sb =
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{
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"Sound Blaster",
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thin_sb_init,
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thin_sb_shutdown,
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thin_sb_start,
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thin_sb_stop,
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thin_sb_setrate,
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NULL,
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NULL
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};
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static snddriver_t *driver_list[] =
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{
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&sb,
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NULL
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};
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static snddriver_t snddriver;
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int thin_sound_init(thinsound_t *sound_params)
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{
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snddriver_t **iter;
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int sample_rate, frag_size, format;
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THIN_ASSERT(sound_params);
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sample_rate = sound_params->sample_rate;
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frag_size = sound_params->frag_size;
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format = sound_params->format;
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for (iter = driver_list; *iter != NULL; iter++)
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{
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if (0 == (*iter)->init(&sample_rate, &frag_size, &format))
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{
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snddriver = **iter;
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/* copy the parameters back */
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sound_params->sample_rate = sample_rate;
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sound_params->frag_size = frag_size;
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sound_params->format = format;
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/* and set the callback */
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snddriver.callback = sound_params->callback;
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snddriver.user_data = sound_params->user_data;
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return 0;
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}
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}
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snddriver.name = NULL;
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thin_printf("thin: could not find any sound drivers.\n");
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return -1;
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}
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void thin_sound_shutdown(void)
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{
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if (NULL == snddriver.name)
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return;
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snddriver.shutdown();
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memset(&snddriver, 0, sizeof(snddriver_t));
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}
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void thin_sound_start(void)
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{
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if (NULL == snddriver.name)
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return;
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THIN_ASSERT(snddriver.callback);
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snddriver.start(snddriver.callback, snddriver.user_data);
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}
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void thin_sound_stop(void)
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{
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if (NULL == snddriver.name)
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return;
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snddriver.stop();
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}
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void thin_sound_setrate(int sample_rate)
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{
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if (snddriver.setrate)
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snddriver.setrate(sample_rate);
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}
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/*
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** $Log: $
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*/
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