/* Sound Thread*/
static void *gp2x_sound_thread_play(void *none)
{
#ifndef NOSOUND
app_DemuteSound();
#endif
return NULL;
}
void gp2x_start_sound()
{
lastlen = 0;
sndOutPtr = sndOutBuffer;
app_DemuteSound();
#if 0
int frag = 0, bsize, buffers;
// if no settings change, we don't need to do anything
if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;
if (sounddev > 0) close(sounddev);
sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);
if (sounddev == -1)
printf("open(\"/dev/dsp\") failed with %i\n", errno);
ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);
ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);
ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);
// calculate buffer size
buffers = 16;
bsize = rate / 32;
if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding
while ((bsize>>=1)) frag++;
frag |= buffers<<16; // 16 buffers
ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);
usleep(192*1024);
printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",
rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));
s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;
#endif
}
void initialize_audio()
{
audio_exit_thread = 0;
audio.output_frequency = 44100;
audio.playback_buffer_size = IPHONE_AUDIO_BUFFER_SIZE;
app_DemuteSound();
}
int msdos_init_sound(void)
{
/* Ask the user if no soundcard was chosen */
if (soundcard == -1)
{
soundcard=1;
}
if (soundcard == 0) /* silence */
{
/* update the Machine structure to show that sound is disabled */
Machine->sample_rate = 0;
return 0;
}
/* use stereo output if supported */
gp2x_sound_stereo=0;
if (usestereo)
{
if (Machine->drv->sound_attributes & SOUND_SUPPORTS_STEREO)
gp2x_sound_stereo=1;
}
stream_cache_data = 0;
stream_cache_len = 0;
stream_cache_stereo = 0;
gp2x_sound_rate=44100;//options.samplerate;//44100; //options.samplerate;
/* update the Machine structure to reflect the actual sample rate */
Machine->sample_rate = gp2x_sound_rate;
logerror("set stereo: %d\n",gp2x_sound_stereo);
logerror("set sample rate: %d\n",Machine->sample_rate);
osd_set_mastervolume(attenuation); /* set the startup volume */
app_MuteSound();
app_DemuteSound();
return 0;
}
