sound blaster code doesn't work yet

[bootcensus] / src / audio.c

diff --git a/src/audio.c b/src/audio.c
index c7142f1..49b8a8d 100644 (file)
--- a/src/audio.c
+++ b/src/audio.c
@@ -19,12 +19,70 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include "audio.h"
 #include "au_sb.h"
 
-void init_audio(void)
+struct audrv {
+       void *(*get_buffer)(int *size);
+       void (*start)(int rate, int nchan);
+       void (*pause)(void);
+       void (*cont)(void);
+       void (*stop)(void);
+       void (*volume)(int vol);
+};
+
+static struct audrv drv;
+
+static audio_callback_func cbfunc;
+static void *cbcls;
+
+void audio_init(void)
 {
        if(sb_detect()) {
-               /* TODO use the sound blaster */
+               drv.get_buffer = sb_buffer;
+               drv.start = sb_start;
+               drv.pause = sb_pause;
+               drv.cont = sb_continue;
+               drv.stop = sb_stop;
+               drv.volume = sb_volume;
                return;
        }
 
        printf("No supported audio device detected\n");
 }
+
+void audio_set_callback(audio_callback_func func, void *cls)
+{
+       cbfunc = func;
+       cbcls = cls;
+}
+
+int audio_callback(void *buf, int sz)
+{
+       if(!cbfunc) {
+               return 0;
+       }
+       return cbfunc(buf, sz, cbcls);
+}
+
+void audio_play(int rate, int nchan)
+{
+       drv.start(rate, nchan);
+}
+
+void audio_pause(void)
+{
+       drv.pause();
+}
+
+void audio_resume(void)
+{
+       drv.cont();
+}
+
+void audio_stop(void)
+{
+       drv.stop();
+}
+
+void audio_volume(int vol)
+{
+       drv.volume(vol);
+}