summaryrefslogtreecommitdiff
path: root/audio
diff options
context:
space:
mode:
authormalc <av1474@comtv.ru>2009-09-18 10:59:38 +0400
committermalc <av1474@comtv.ru>2009-09-18 14:04:36 +0400
commitddabec73e6aaae97eaa8b42d6c22f51ffcffe96a (patch)
treeece37c4a5141ea9c8f36d3c5003175c5742fd7df /audio
parentaudio: use muldiv64 where it makes sense (diff)
downloadqemu-kvm-ddabec73e6aaae97eaa8b42d6c22f51ffcffe96a.tar.gz
qemu-kvm-ddabec73e6aaae97eaa8b42d6c22f51ffcffe96a.tar.bz2
qemu-kvm-ddabec73e6aaae97eaa8b42d6c22f51ffcffe96a.zip
audio: introduce audio_pcm_hw_clip_out helper function
Signed-off-by: malc <av1474@comtv.ru>
Diffstat (limited to 'audio')
-rw-r--r--audio/audio.c22
-rw-r--r--audio/audio_int.h3
2 files changed, 25 insertions, 0 deletions
diff --git a/audio/audio.c b/audio/audio.c
index a3e23b212..d8e1e1519 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -851,6 +851,28 @@ int audio_pcm_hw_get_live_in (HWVoiceIn *hw)
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)
*/
diff --git a/audio/audio_int.h b/audio/audio_int.h
index ce791ee46..7ea872926 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -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_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);
void *audio_calloc (const char *funcname, int nmemb, size_t size);