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ao_openal: enable AL_SOFT_direct_channels_remix extension by default 

Prevent audio distortions caused by OpenAL's 3D effects.
This commit is contained in:
Ivan 2021-11-20 01:17:01 +02:00 committed by sfan5
parent ac39af461d
commit 87ce3b31a9
2 changed files with 10 additions and 6 deletions
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4
DOCS/man/ao.rst
View File

@ -112,9 +112,7 @@ Available audio output drivers are:
``--openal-direct-channels=<yes|no>``
Enable OpenAL Soft's direct channel extension when available to avoid
tinting the sound with ambisonics or HRTF.
Channels are dropped when when they are not available as downmixing
will be disabled. Default: no.
tinting the sound with ambisonics or HRTF. Default: yes.
``pulse``
PulseAudio audio output driver

12
audio/out/ao_openal.c
View File

@ -199,8 +199,14 @@ static int init(struct ao *ao)
alListenerfv(AL_ORIENTATION, direction);
alGenSources(1, &source);
if (p->direct_channels && alGetEnumValue((ALchar*)"AL_DIRECT_CHANNELS_SOFT")) {
alSourcei(source, alGetEnumValue((ALchar*)"AL_DIRECT_CHANNELS_SOFT"), AL_TRUE);
if (p->direct_channels) {
if (alIsExtensionPresent("AL_SOFT_direct_channels_remix")) {
alSourcei(source,
alGetEnumValue((ALchar*)"AL_DIRECT_CHANNELS_SOFT"),
alcGetEnumValue(dev, "AL_REMIX_UNMATCHED_SOFT"));
} else {
MP_WARN(ao, "Direct channels aren't supported by this version of OpenAL\n");
}
}
cur_buf = 0;
@ -385,7 +391,7 @@ const struct ao_driver audio_out_openal = {
.priv_defaults = &(const struct priv) {
.num_buffers = 4,
.num_samples = 8192,
.direct_channels = 0,
.direct_channels = 1,
},
.options = (const struct m_option[]) {
{"num-buffers", OPT_INT(num_buffers), M_RANGE(2, MAX_BUF)},