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audio: split sample conversion and volume mixing

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Refactor the volume mixing, so it can be reused for capturing devices.
Additionally, it removes superfluous multiplications with the nominal
volume within the hardware voice code path.

Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Michael Walle 2011-01-05 01:05:47 +01:00 • committed by malc
parent 0f136d9e06
commit 00e076795f
13 changed files with 52 additions and 55 deletions
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4
audio/mixeng.h
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@ -33,8 +33,7 @@ struct mixeng_volume { int mute; int64_t r; int64_t l; };
struct st_sample { int64_t l; int64_t r; };
#endif
typedef void (t_sample) (struct st_sample *dst, const void *src,
int samples, struct mixeng_volume *vol);
typedef void (t_sample) (struct st_sample *dst, const void *src, int samples);
typedef void (f_sample) (void *dst, const struct st_sample *src, int samples);
extern t_sample *mixeng_conv[2][2][2][3];
@ -47,5 +46,6 @@ void st_rate_flow_mix (void *opaque, struct st_sample *ibuf, struct st_sample *o
int *isamp, int *osamp);
void st_rate_stop (void *opaque);
void mixeng_clear (struct st_sample *buf, int len);
void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol);
#endif /* mixeng.h */