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update pulseaudio for 44.1khz audio (#587)

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* use pulseaudio defaults

* spaces/tabs

* pulseaudio values tuned for n64 audio at 44.1khz

* update tlength

* remove one hardcoded samplerate

Co-authored-by: briaguya <briaguya@alice>
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briaguya 2022-07-05 19:30:30 -04:00 committed by GitHub
parent 0b7137b8b0
commit 2b99e65d24
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1 changed files with 17 additions and 4 deletions
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21
libultraship/libultraship/PulseAudioPlayer.cpp
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@ -77,11 +77,24 @@ namespace Ship
ss.rate = this->GetSampleRate();
ss.channels = 2;
#define SAMPLES_HIGH 752
#define SAMPLES_LOW 720
pa_buffer_attr attr;
attr.maxlength = (1600 + 544 + 528 + 1600) * 4;
attr.tlength = (528*2 + 544) * 4;
attr.prebuf = 1500 * 4;
attr.minreq = 161 * 4;
// set the max length to the desired buffered level, plus
// 3x the high sample rate, which is what the n64 audio engine
// can output at one time, x2 to avoid overflow in case of the
// n64 audio engine running faster than pulseaudio, all multiplied
// by 4 because each sample is 4 bytes
attr.maxlength = (GetDesiredBuffered() + 3 * SAMPLES_HIGH * 2) * 4;
// slightly more than one double audio update
attr.prebuf = SAMPLES_HIGH * 3 * 1.5 * 4;
attr.minreq = 222 * 4;
attr.tlength = (GetSampleRate() / 20) * 4;
// initialize to a value that is deemed sensible by the server
attr.fragsize = (uint32_t)-1;
m_Stream = pa_stream_new(m_Context, "zelda", &ss, NULL);