Mirrors/citra-nightly
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

audio_core: Simplify sink interface

Browse source
This commit is contained in:
MerryMage 2018-09-08 21:07:28 +01:00
parent 761ef78408
commit f34711219a
8 changed files with 42 additions and 131 deletions
Download patch file Download diff file Expand all files Collapse all files

58
src/audio_core/sdl2_sink.cpp
View file

@ -2,8 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <list>
#include <numeric>
#include <string>
#include <vector>
#include <SDL.h>
#include "audio_core/audio_types.h"
#include "audio_core/sdl2_sink.h"
@ -17,7 +17,7 @@ struct SDL2Sink::Impl {
SDL_AudioDeviceID audio_device_id = 0;
std::list<std::vector<s16>> queue;
std::function<void(s16*, std::size_t)> cb;
static void Callback(void* impl_, u8* buffer, int buffer_size_in_bytes);
};
@ -74,58 +74,18 @@ unsigned int SDL2Sink::GetNativeSampleRate() const {
return impl->sample_rate;
}
void SDL2Sink::EnqueueSamples(const s16* samples, std::size_t sample_count) {
if (impl->audio_device_id <= 0)
return;
SDL_LockAudioDevice(impl->audio_device_id);
impl->queue.emplace_back(samples, samples + sample_count * 2);
SDL_UnlockAudioDevice(impl->audio_device_id);
}
size_t SDL2Sink::SamplesInQueue() const {
if (impl->audio_device_id <= 0)
return 0;
SDL_LockAudioDevice(impl->audio_device_id);
std::size_t total_size =
std::accumulate(impl->queue.begin(), impl->queue.end(), static_cast<std::size_t>(0),
[](std::size_t sum, const auto& buffer) {
// Division by two because each stereo sample is made of
// two s16.
return sum + buffer.size() / 2;
});
SDL_UnlockAudioDevice(impl->audio_device_id);
return total_size;
void SDL2Sink::SetCallback(std::function<void(s16*, std::size_t)> cb) {
impl->cb = cb;
}
void SDL2Sink::Impl::Callback(void* impl_, u8* buffer, int buffer_size_in_bytes) {
Impl* impl = reinterpret_cast<Impl*>(impl_);
if (!impl || !impl->cb)
return;
std::size_t remaining_size = static_cast<std::size_t>(buffer_size_in_bytes) /
sizeof(s16); // Keep track of size in 16-bit increments.
const size_t num_frames = buffer_size_in_bytes / (2 * sizeof(s16));
while (remaining_size > 0 && !impl->queue.empty()) {
if (impl->queue.front().size() <= remaining_size) {
memcpy(buffer, impl->queue.front().data(), impl->queue.front().size() * sizeof(s16));
buffer += impl->queue.front().size() * sizeof(s16);
remaining_size -= impl->queue.front().size();
impl->queue.pop_front();
} else {
memcpy(buffer, impl->queue.front().data(), remaining_size * sizeof(s16));
buffer += remaining_size * sizeof(s16);
impl->queue.front().erase(impl->queue.front().begin(),
impl->queue.front().begin() + remaining_size);
remaining_size = 0;
}
}
if (remaining_size > 0) {
memset(buffer, 0, remaining_size * sizeof(s16));
}
impl->cb(reinterpret_cast<s16*>(buffer), num_frames);
}
std::vector<std::string> ListSDL2SinkDevices() {