thirdpartymirrors/UnleashedRecomp
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Implement audio timing with integer math.

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This commit is contained in:
Skyth 2024-12-21 15:28:08 +03:00
parent 314a092747
commit 74f58ab0cc
1 changed files with 6 additions and 9 deletions
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13
UnleashedRecomp/apu/driver/sdl2_driver.cpp
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@ -40,10 +40,8 @@ static void AudioThread()
GuestThreadContext ctx(0); GuestThreadContext ctx(0);
size_t channels = g_downMixToStereo ? 2 : XAUDIO_NUM_CHANNELS; size_t channels = g_downMixToStereo ? 2 : XAUDIO_NUM_CHANNELS;
constexpr double INTERVAL = double(XAUDIO_NUM_SAMPLES) / double(XAUDIO_SAMPLES_HZ);
auto start = std::chrono::steady_clock::now(); auto start = std::chrono::steady_clock::now();
size_t iteration = 1; int64_t iteration = 1;
while (true) while (true)
{ {
@ -57,15 +55,14 @@ static void AudioThread()
g_clientCallback(ctx.ppcContext, reinterpret_cast<uint8_t*>(g_memory.base)); g_clientCallback(ctx.ppcContext, reinterpret_cast<uint8_t*>(g_memory.base));
} }
auto next = start + std::chrono::duration<double>(iteration * INTERVAL); auto next = start + std::chrono::nanoseconds((iteration * XAUDIO_NUM_SAMPLES * 1000000000ll) / XAUDIO_SAMPLES_HZ);
auto now = std::chrono::steady_clock::now(); auto now = std::chrono::steady_clock::now();
if ((next - now) > 1s) if ((next - now) < 1s)
next = now;
std::this_thread::sleep_until(next); std::this_thread::sleep_until(next);
iteration = std::chrono::duration<double>(std::chrono::steady_clock::now() - start).count() / INTERVAL + 1; int64_t elapsed = std::chrono::nanoseconds(std::chrono::steady_clock::now() - start).count();
iteration = ((elapsed * XAUDIO_SAMPLES_HZ) / (XAUDIO_NUM_SAMPLES * 1000000000ll)) + 1;
} }
} }