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authorJan Ekström <jeebjp@gmail.com>2018-04-15 01:18:53 +0300
committerJan Ekström <jeebjp@gmail.com>2018-04-15 01:18:53 +0300
commit9de51b6032b5a1ee14fc85017ea9f77f612c7704 (patch)
tree40d5bf3cd3cda8ddb3d4f1e88938ef326cb3647c
parente00ca83006464ca03e35d04d4a0d0467a7143ff3 (diff)
downloadmpv-9de51b6032b5a1ee14fc85017ea9f77f612c7704.tar.bz2
mpv-9de51b6032b5a1ee14fc85017ea9f77f612c7704.tar.xz
ao_openal: document the muted↔gain conversion
This struck me as odd for a moment, so adding a comment.
-rw-r--r--audio/out/ao_openal.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/audio/out/ao_openal.c b/audio/out/ao_openal.c
index 9381d2a906..c1f405bf12 100644
--- a/audio/out/ao_openal.c
+++ b/audio/out/ao_openal.c
@@ -95,6 +95,9 @@ static int control(struct ao *ao, enum aocontrol cmd, void *arg)
case AOCONTROL_GET_MUTE:
case AOCONTROL_SET_MUTE: {
bool mute = *(bool *)arg;
+
+ // openal has no mute control, only gain.
+ // Thus reverse the muted state to get required gain
ALfloat al_mute = (ALfloat)(!mute);
if (cmd == AOCONTROL_SET_MUTE) {
alSourcef(source, AL_GAIN, al_mute);