[Qemu-devel] [PATCH 01/11] audio: add VOICE_VOLUME ctl

["Marc-André Lureau" <marcandre.lureau@gmail.com>]

Add a new PCM control operation to update the stream volume on the
audio backend.  The argument given is a SWVoiceOut/SWVoiceIn.
---
 audio/audio.c     |   12 ++++++++++++
 audio/audio_int.h |    1 +
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/audio/audio.c b/audio/audio.c
index 398763f..d76c342 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -2053,17 +2053,29 @@ void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque)
 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol)
 {
     if (sw) {
+        HWVoiceOut *hw = sw->hw;
+
         sw->vol.mute = mute;
         sw->vol.l = nominal_volume.l * lvol / 255;
         sw->vol.r = nominal_volume.r * rvol / 255;
+
+        if (hw->pcm_ops->ctl_out) {
+            hw->pcm_ops->ctl_out (hw, VOICE_VOLUME, sw);
+        }
     }
 }
 
 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol)
 {
     if (sw) {
+        HWVoiceIn *hw = sw->hw;
+
         sw->vol.mute = mute;
         sw->vol.l = nominal_volume.l * lvol / 255;
         sw->vol.r = nominal_volume.r * rvol / 255;
+
+        if (hw->pcm_ops->ctl_in) {
+            hw->pcm_ops->ctl_in (hw, VOICE_VOLUME, sw);
+        }
     }
 }
diff --git a/audio/audio_int.h b/audio/audio_int.h
index 2003f8b..117f95e 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -231,6 +231,7 @@ void audio_run (const char *msg);
 
 #define VOICE_ENABLE 1
 #define VOICE_DISABLE 2
+#define VOICE_VOLUME 3
 
 static inline int audio_ring_dist (int dst, int src, int len)
 {
-- 
1.7.7.6