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ao_coreaudio_exclusive: account for additional latency

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Whether this is correct is unknown. This change tripples the latency
from ~15ms to ~45ms.

XBMC does this, VLC does not from what I could see.
This commit is contained in:
wm4 2015-04-28 22:09:51 +02:00
parent 025cb3b9e3
commit 5f86fad2f0
1 changed files with 10 additions and 3 deletions
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13
audio/out/ao_coreaudio_exclusive.c
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@ -501,10 +501,17 @@ static int init_digital(struct ao *ao, AudioStreamBasicDescription asbd)
p->stream_asbd.mFramesPerPacket);
uint32_t latency_frames = 0;
err = CA_GET_O(p->device, kAudioDevicePropertyLatency, &latency_frames);
if (err != noErr) {
uint32_t latency_properties[] = {
kAudioDevicePropertyLatency,
kAudioDevicePropertyBufferFrameSize,
kAudioDevicePropertySafetyOffset,
};
for (int n = 0; n < MP_ARRAY_SIZE(latency_properties); n++) {
uint32_t temp;
err = CA_GET_O(p->device, kAudioDevicePropertyLatency, &temp);
CHECK_CA_WARN("cannot get device latency");
latency_frames = 0;
if (err == noErr)
latency_frames += temp;
}
p->hw_latency_us = ca_frames_to_us(ao, latency_frames);