+++ /dev/null
-/* sound output via OSS */
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/soundcard.h>
-#include <unistd.h>
-
-#include "sndout_oss.h"
-
-static int sounddev = -1, mixerdev = -1;
-static int can_write_safe;
-
-#define FRAG_COUNT 4
-
-int sndout_oss_init(void)
-{
- if (mixerdev >= 0) close(mixerdev);
- mixerdev = open("/dev/mixer", O_RDWR);
- if (mixerdev == -1)
- {
- perror("open(\"/dev/mixer\")");
- }
-
- 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 stereo, int frames_in_frag)
-{
- static int s_oldrate = 0, s_oldstereo = 0;
- int frag, bsize, bits, ret;
-
- // 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_oldstereo == stereo)
- return 0;
-
- sndout_oss_stop();
- sounddev = open("/dev/dsp", O_WRONLY);
- if (sounddev == -1)
- {
- perror("open(\"/dev/dsp\")");
- sounddev = open("/dev/dsp1", O_WRONLY);
- if (sounddev == -1) {
- perror("open(\"/dev/dsp1\")");
- return -1;
- }
- }
-
- // try to fit frames_in_frag frames worth of data in fragment
- // ignore mono because it's unlikely to be used and
- // both GP2X and Wiz mixes mono to stereo anyway.
- bsize = (frames_in_frag * rate / 50) * 4;
-
- for (frag = 0; bsize; bsize >>= 1, frag++)
- ;
-
- frag |= FRAG_COUNT << 16; // fragment count
- ret = ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);
- if (ret < 0)
- perror("SNDCTL_DSP_SETFRAGMENT failed");
-
- bits = 16;
- ret = ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);
- if (ret == 0)
- ret = ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);
- if (ret == 0)
- ret = ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);
- 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));
-
- s_oldrate = rate; s_oldstereo = stereo;
- can_write_safe = 0;
- return 0;
-}
-
-int sndout_oss_write(const void *buff, int len)
-{
- return write(sounddev, buff, len);
-}
-
-#include "../common/plat.h"
-
-/* not really non-blocking, just detects if blocking occurs
- * and starts skipping writes in case it does. */
-int sndout_oss_write_nb(const void *buff, int len)
-{
- static int lag_counter, skip_counter;
- unsigned int t;
- int ret;
-
- if (lag_counter > 2) {
- // skip writes if audio starts blocking
- lag_counter = 0;
- skip_counter = FRAG_COUNT;
- }
-
- if (skip_counter > 0) {
- skip_counter--;
- return len;
- }
-
- t = plat_get_ticks_ms();
- ret = sndout_oss_write(buff, len);
- t = plat_get_ticks_ms() - t;
- if (t > 1) {
- // this shouldn't really happen, most likely audio is out of sync
- lag_counter++;
- if (lag_counter > 2)
- printf("audio lag %u\n", t);
- }
- else
- lag_counter = 0;
-
- return ret;
-}
-
-int sndout_oss_can_write(int bytes)
-{
- audio_buf_info bi;
- int ret;
-
-#ifdef __GP2X__
- // note: SNDCTL_DSP_GETOSPACE crashes F100 kernel for some reason
- // if called too early, so we work around here
- if (can_write_safe++ < 8)
- return 1;
-#endif
- ret = ioctl(sounddev, SNDCTL_DSP_GETOSPACE, &bi);
- if (ret < 0)
- return 1;
-
- // have enough bytes to write + 1 frag
- return bi.bytes - bi.fragsize >= bytes ? 1 : 0;
-}
-
-void sndout_oss_sync(void)
-{
- ioctl(sounddev, SOUND_PCM_SYNC, 0);
-}
-
-void sndout_oss_setvol(int l, int r)
-{
- if (mixerdev < 0) return;
-
- l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;
- l<<=8; l|=r;
- ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/
-}
-
-void sndout_oss_exit(void)
-{
- if (sounddev >= 0) close(sounddev); sounddev = -1;
- if (mixerdev >= 0) close(mixerdev); mixerdev = -1;
-}
-
notaz.gp2x.de / picodrive.git / blobdiff