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core: Take samples from silence cache rather than write zeros

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If the only stream to render from is muted take samples from the
silence cache. This should shrink memory/cache bandwidth. Again the
gain was not what I hoped for.
This commit is contained in:
Jyri Sarha 2009-05-07 19:55:57 +03:00 • committed by Lennart Poettering
parent d7b8947a5e
commit 35faedb6e8
1 changed files with 22 additions and 10 deletions
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32
src/pulsecore/sink.c
View file

@ -787,11 +787,17 @@ void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result) {
pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume); pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) { if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) {
pa_memchunk_make_writable(result, 0); if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume)) {
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume)) pa_memblock_unref(result->memblock);
pa_silence_memchunk(result, &s->sample_spec); pa_silence_memchunk_get(&s->core->silence_cache,
else s->core->mempool,
result,
&s->sample_spec,
result->length);
} else {
pa_memchunk_make_writable(result, 0);
pa_volume_memchunk(result, &s->sample_spec, &volume); pa_volume_memchunk(result, &s->sample_spec, &volume);
}
} }
} else { } else {
void *ptr; void *ptr;
@ -968,13 +974,19 @@ void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result) {
pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume); pa_sw_cvolume_multiply(&volume, &s->thread_info.soft_volume, &info[0].volume);
if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) { if (s->thread_info.soft_muted || !pa_cvolume_is_norm(&volume)) {
pa_memchunk_make_writable(result, length); if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume)) {
if (s->thread_info.soft_muted || pa_cvolume_is_muted(&volume)) pa_memblock_unref(result->memblock);
pa_silence_memchunk(result, &s->sample_spec); pa_silence_memchunk_get(&s->core->silence_cache,
else s->core->mempool,
result,
&s->sample_spec,
result->length);
} else {
pa_memchunk_make_writable(result, length);
pa_volume_memchunk(result, &s->sample_spec, &volume); pa_volume_memchunk(result, &s->sample_spec, &volume);
} }
}
} else { } else {
void *ptr; void *ptr;