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audio: don't apply volume effect if backend has VOICE_VOLUME_CAP

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If the audio backend is capable of volume control, don't apply
software volume (mixeng_volume ()), but instead, rely on backend
volume control. This will allow guest to have full range volume
control.

Signed-off-by: Marc-Andr? Lureau <marcandre.lureau@redhat.com>
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
Marc-André Lureau 2012-04-17 14:32:36 +02:00 • committed by malc
parent 6c95ab94f9
commit c01b245623
3 changed files with 14 additions and 2 deletions
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9
audio/audio.c
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@ -957,7 +957,9 @@ int audio_pcm_sw_read (SWVoiceIn *sw, void *buf, int size)
total += isamp;
}
mixeng_volume (sw->buf, ret, &sw->vol);
if (!(hw->ctl_caps & VOICE_VOLUME_CAP)) {
mixeng_volume (sw->buf, ret, &sw->vol);
}
sw->clip (buf, sw->buf, ret);
sw->total_hw_samples_acquired += total;
@ -1041,7 +1043,10 @@ int audio_pcm_sw_write (SWVoiceOut *sw, void *buf, int size)
swlim = audio_MIN (swlim, samples);
if (swlim) {
sw->conv (sw->buf, buf, swlim);
mixeng_volume (sw->buf, swlim, &sw->vol);
if (!(sw->hw->ctl_caps & VOICE_VOLUME_CAP)) {
mixeng_volume (sw->buf, swlim, &sw->vol);
}
}
while (swlim) {