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audio: introduce audio_pcm_hw_clip_out helper function

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Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
malc 2009-09-18 10:59:38 +04:00
parent 4f4cc0efde
commit ddabec73e6
2 changed files with 25 additions and 0 deletions
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22
audio/audio.c
View File

@ -851,6 +851,28 @@ int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
return live; return live;
} }
int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
int live, int pending)
{
int left = hw->samples - pending;
int len = audio_MIN (left, live);
int clipped = 0;
while (len) {
struct st_sample *src = hw->mix_buf + hw->rpos;
uint8_t *dst = advance (pcm_buf, hw->rpos << hw->info.shift);
int samples_till_end_of_buf = hw->samples - hw->rpos;
int samples_to_clip = audio_MIN (len, samples_till_end_of_buf);
hw->clip (dst, src, samples_to_clip);
hw->rpos = (hw->rpos + samples_to_clip) % hw->samples;
len -= samples_to_clip;
clipped += samples_to_clip;
}
return clipped;
}
/* /*
* Soft voice (capture) * Soft voice (capture)
*/ */

3
audio/audio_int.h
View File

@ -221,6 +221,9 @@ int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int len);
int audio_pcm_hw_get_live_out (HWVoiceOut *hw); int audio_pcm_hw_get_live_out (HWVoiceOut *hw);
int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live); int audio_pcm_hw_get_live_out2 (HWVoiceOut *hw, int *nb_live);
int audio_pcm_hw_clip_out (HWVoiceOut *hw, void *pcm_buf,
int live, int pending);
int audio_bug (const char *funcname, int cond); int audio_bug (const char *funcname, int cond);
void *audio_calloc (const char *funcname, int nmemb, size_t size); void *audio_calloc (const char *funcname, int nmemb, size_t size);