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fixed latency and buffer duration calculations

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This commit is contained in:
Zoran Vuckovic 2017-04-10 06:22:30 +02:00 committed by twinaphex
parent 129151d5fc
commit 2a594d313c
1 changed files with 13 additions and 11 deletions
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24
audio/drivers/wasapi.c
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@ -222,15 +222,15 @@ static IAudioClient *wasapi_init_client(IMMDevice *device, bool exclusive,
hr = client->lpVtbl->GetDevicePeriod(client, &default_period, &minimum_period); hr = client->lpVtbl->GetDevicePeriod(client, &default_period, &minimum_period);
WASAPI_HR_CHECK(hr, "IAudioClient::GetDevicePeriod", goto error); WASAPI_HR_CHECK(hr, "IAudioClient::GetDevicePeriod", goto error);
if (exclusive) if (!exclusive)
{ buffer_duration = 0; // required for event driven shared mode
if (latency < minimum_period / 10000)
buffer_duration = minimum_period;
else
buffer_duration = latency * 10000;
}
else else
buffer_duration = 0; {
// 3 buffers latency (ms) to 2 buffer duration (100ns units)
buffer_duration = (double)latency * 10000.0 * 2.0 / 3.0;
if (buffer_duration < minimum_period)
buffer_duration = minimum_period;
}
WAVEFORMATEXTENSIBLE wf; WAVEFORMATEXTENSIBLE wf;
wf.Format.nChannels = 2; wf.Format.nChannels = 2;
@ -276,11 +276,13 @@ static IAudioClient *wasapi_init_client(IMMDevice *device, bool exclusive,
hr = client->lpVtbl->GetStreamLatency(client, &stream_latency); hr = client->lpVtbl->GetStreamLatency(client, &stream_latency);
if(hr != S_OK) if(hr != S_OK)
wasapi_com_err("IAudioClient::GetStreamLatency", hr); wasapi_com_err("IAudioClient::GetStreamLatency", hr);
else if (!exclusive) else if (exclusive)
stream_latency *= 1.5;
else
stream_latency += default_period; stream_latency += default_period;
RARCH_LOG("[WASAPI]: Client initialized (latency %ums).\n", RARCH_LOG("[WASAPI]: Client initialized (max latency %.1fms).\n",
(unsigned)((double)stream_latency / 10000.0 + 0.5)); (double)stream_latency / 10000.0 + 0.05);
return client; return client;