AuroraMiddleware/AuroraOpenALSoft
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Scale and round NumUpdates when PulseAudio changes the sample rate

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This commit is contained in:
Chris Robinson 2012-10-04 23:24:40 -07:00
parent f138774d78
commit 468759e6ab
1 changed files with 7 additions and 7 deletions
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14
Alc/backends/pulseaudio.c
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@ -1100,12 +1100,10 @@ static ALCboolean pulse_reset_playback(ALCdevice *device)
/* Server updated our playback rate, so modify the buffer attribs
* accordingly. */
device->UpdateSize = (ALuint64)device->UpdateSize * data->spec.rate /
device->Frequency;
if((CPUCapFlags&CPU_CAP_SSE))
device->UpdateSize = (device->UpdateSize+3)&~3;
device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates / device->Frequency *
data->spec.rate + 0.5);
data->attr.minreq = device->UpdateSize * pa_frame_size(&data->spec);
data->attr.tlength = data->attr.minreq * maxu(device->NumUpdates, 2);
data->attr.tlength = data->attr.minreq * clampu(device->NumUpdates, 2, 16);
data->attr.maxlength = -1;
data->attr.prebuf = 0;
@ -1124,8 +1122,10 @@ static ALCboolean pulse_reset_playback(ALCdevice *device)
stream_buffer_attr_callback(data->stream, device);
len = data->attr.minreq / pa_frame_size(&data->spec);
device->NumUpdates = (device->UpdateSize*device->NumUpdates + len/2) / len;
device->NumUpdates = maxu(device->NumUpdates, 2);
if((CPUCapFlags&CPU_CAP_SSE))
len = (len+3)&~3;
device->NumUpdates = (ALuint)((ALdouble)device->NumUpdates/len*device->UpdateSize + 0.5);
device->NumUpdates = clampu(device->NumUpdates, 2, 16);
device->UpdateSize = len;
pa_threaded_mainloop_unlock(data->loop);