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support multiple sound drivers, add sdl

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This commit is contained in:
Grazvydas Ignotas 2013-06-23 22:23:57 +03:00
parent 20b143089c
commit 26d3ca0d29
6 changed files with 294 additions and 6 deletions
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12
linux/sndout_oss.c
View file

@ -20,6 +20,8 @@
#include "sndout_oss.h"
int sndout_oss_frag_frames = 1;
static int sounddev = -1, mixerdev = -1;
static int can_write_safe;
@ -47,7 +49,7 @@ void sndout_oss_stop(void)
sounddev = -1;
}
int sndout_oss_start(int rate, int stereo, int frames_in_frag)
int sndout_oss_start(int rate, int stereo)
{
static int s_oldrate = 0, s_oldstereo = 0;
int frag, bsize, bits, ret;
@ -69,10 +71,11 @@ int sndout_oss_start(int rate, int stereo, int frames_in_frag)
}
}
// try to fit frames_in_frag frames worth of data in fragment
// try to fit sndout_oss_frag_frames (video) frames
// worth of sound data in OSS 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;
bsize = (sndout_oss_frag_frames * rate / 50) * 4;
for (frag = 0; bsize; bsize >>= 1, frag++)
;
@ -164,8 +167,9 @@ int sndout_oss_can_write(int bytes)
return bi.bytes - bi.fragsize >= bytes ? 1 : 0;
}
void sndout_oss_sync(void)
void sndout_oss_wait(void)
{
// FIXME?
ioctl(sounddev, SOUND_PCM_SYNC, 0);
}

7
linux/sndout_oss.h
View file

@ -1,9 +1,12 @@
int sndout_oss_init(void);
int sndout_oss_start(int rate, int stereo, int frames_in_frag);
int sndout_oss_start(int rate, int stereo);
void sndout_oss_stop(void);
int sndout_oss_write(const void *buff, int len);
int sndout_oss_write_nb(const void *buff, int len);
int sndout_oss_can_write(int bytes);
void sndout_oss_sync(void);
void sndout_oss_wait(void);
void sndout_oss_setvol(int l, int r);
void sndout_oss_exit(void);
/* make oss fragment size to fit this much video frames */
extern int sndout_oss_frag_frames;