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pandora: tripplebuffer fbdev out, refactoring

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@845 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-12-20 19:47:55 +00:00
parent b60b8745c0
commit d08e732614
17 changed files with 404 additions and 171 deletions
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24
platform/linux/sndout_oss.c
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@ -25,21 +25,27 @@ int sndout_oss_init(void)
return 0;
}
void sndout_oss_stop(void)
{
if (sounddev < 0)
return;
ioctl(sounddev, SOUND_PCM_SYNC, 0);
close(sounddev);
sounddev = -1;
}
int sndout_oss_start(int rate, int frame_samples, int stereo)
{
static int s_oldrate = 0, s_old_fsamples = 0, s_oldstereo = 0;
int frag, bsize, bits, ret;
// if no settings change, we don't need to do anything,
// since audio is never stopped
if (rate == s_oldrate && s_old_fsamples == frame_samples && s_oldstereo == stereo)
// GP2X: if no settings change, we don't need to do anything,
// since audio is never stopped there
if (sounddev >= 0 && rate == s_oldrate && s_old_fsamples == frame_samples && s_oldstereo == stereo)
return 0;
if (sounddev >= 0) {
ioctl(sounddev, SOUND_PCM_SYNC, 0);
close(sounddev);
}
sndout_oss_stop();
sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);
if (sounddev == -1)
{
@ -72,8 +78,10 @@ int sndout_oss_start(int rate, int frame_samples, int stereo)
if (ret < 0)
perror("failed to set audio format");
#ifdef __GP2X__
// not sure if this is still needed (avoiding driver bugs?)
usleep(192*1024);
#endif
printf("sndout_oss_start: %d/%dbit/%s, %d buffers of %i bytes\n",
rate, bits, stereo ? "stereo" : "mono", frag >> 16, 1 << (frag & 0xffff));