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SPU2/SDL: Remove intermediate buffer and write samples directly to the

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buffer provided by the SDL callback.
This commit is contained in:
Oschowa 2021-02-21 12:54:20 +01:00 committed by refractionpcsx2
parent c5a243ba43
commit f62636e893
1 changed files with 4 additions and 17 deletions
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21
pcsx2/SPU2/SndOut_SDL.cpp
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@ -48,25 +48,15 @@ namespace
Uint16 samples = desiredSamples;
std::unique_ptr<StereoOut_SDL[]> buffer;
void callback_fillBuffer(void* userdata, Uint8* stream, int len)
{
Uint16 sdl_samples = samples;
#if SDL_MAJOR_VERSION >= 2
memset(stream, 0, len);
// As of SDL 2.0.4 the buffer is too small to contains all samples
// len is 2048, samples is 1024 and sizeof(StereoOut_SDL) is 4
sdl_samples = len / sizeof(StereoOut_SDL);
#endif
StereoOut16 *out = (StereoOut16 *)stream;
// Length should always be samples in bytes.
assert(len / sizeof(StereoOut_SDL) == sdl_samples);
assert(len / sizeof(StereoOut_SDL) == samples);
for (Uint16 i = 0; i < sdl_samples; i += SndOutPacketSize)
SndBuffer::ReadSamples(&buffer[i]);
SDL_MixAudio(stream, (Uint8*)buffer.get(), len, SDL_MIX_MAXVOLUME);
for (Uint16 i = 0; i < samples; i += SndOutPacketSize)
SndBuffer::ReadSamples(&out[i]);
}
} // namespace
@ -118,9 +108,6 @@ struct SDLAudioMod : public SndOutModule
std::cerr << "Opened SDL audio driver: " << SDL_GetCurrentAudioDriver() << std::endl;
#endif
/* This is so ugly. It is hilariously ugly. I didn't use a vector to save reallocs. */
if (samples != spec.samples || buffer == nullptr)
buffer = std::unique_ptr<StereoOut_SDL[]>(new StereoOut_SDL[spec.samples]);
if (samples != spec.samples)
{
fprintf(stderr, "SPU2: SDL failed to get desired samples (%d) got %d samples instead\n", samples, spec.samples);