147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
// Copyright 2018 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <vector>
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#include <cubeb/cubeb.h>
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#include "audio_core/audio_types.h"
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#include "audio_core/cubeb_sink.h"
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#include "common/logging/log.h"
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#include "core/settings.h"
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namespace AudioCore {
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struct CubebSink::Impl {
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unsigned int sample_rate = 0;
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cubeb* ctx = nullptr;
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cubeb_stream* stream = nullptr;
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std::vector<s16> queue;
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static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
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void* output_buffer, long num_frames);
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static void StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state);
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};
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CubebSink::CubebSink() : impl(std::make_unique<Impl>()) {
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if (cubeb_init(&impl->ctx, "Citra", nullptr) != CUBEB_OK) {
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NGLOG_CRITICAL(Audio_Sink, "cubeb_init failed");
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return;
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}
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const char* target_device_name = nullptr;
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cubeb_devid output_device = nullptr;
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cubeb_stream_params params;
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params.rate = native_sample_rate;
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params.channels = 2;
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params.format = CUBEB_SAMPLE_S16NE;
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params.layout = CUBEB_LAYOUT_STEREO;
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impl->sample_rate = native_sample_rate;
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u32 minimum_latency = 0;
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if (cubeb_get_min_latency(impl->ctx, ¶ms, &minimum_latency) != CUBEB_OK)
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NGLOG_CRITICAL(Audio_Sink, "Error getting minimum latency");
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cubeb_device_collection collection;
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if (cubeb_enumerate_devices(impl->ctx, CUBEB_DEVICE_TYPE_OUTPUT, &collection) != CUBEB_OK) {
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NGLOG_WARNING(Audio_Sink, "Audio output device enumeration not supported");
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} else {
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if (collection.count >= 1 && Settings::values.audio_device_id != "auto" &&
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!Settings::values.audio_device_id.empty()) {
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target_device_name = Settings::values.audio_device_id.c_str();
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}
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for (size_t i = 0; i < collection.count; i++) {
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const cubeb_device_info& device = collection.device[i];
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device_list.emplace_back(device.friendly_name);
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if (target_device_name && strcmp(target_device_name, device.friendly_name) == 0) {
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output_device = device.devid;
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}
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}
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cubeb_device_collection_destroy(impl->ctx, &collection);
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}
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if (cubeb_stream_init(impl->ctx, &impl->stream, "Citra Audio Output", nullptr, nullptr,
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output_device, ¶ms, std::max(512u, minimum_latency),
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&Impl::DataCallback, &Impl::StateCallback, impl.get()) != CUBEB_OK) {
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NGLOG_CRITICAL(Audio_Sink, "Error initializing cubeb stream");
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return;
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}
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if (cubeb_stream_start(impl->stream) != CUBEB_OK) {
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NGLOG_CRITICAL(Audio_Sink, "Error starting cubeb stream");
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return;
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}
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}
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CubebSink::~CubebSink() {
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if (!impl->ctx)
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return;
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if (cubeb_stream_stop(impl->stream) != CUBEB_OK) {
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NGLOG_CRITICAL(Audio_Sink, "Error stopping cubeb stream");
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}
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cubeb_stream_destroy(impl->stream);
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cubeb_destroy(impl->ctx);
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}
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unsigned int CubebSink::GetNativeSampleRate() const {
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if (!impl->ctx)
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return native_sample_rate;
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return impl->sample_rate;
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}
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std::vector<std::string> CubebSink::GetDeviceList() const {
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return device_list;
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}
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void CubebSink::EnqueueSamples(const s16* samples, size_t sample_count) {
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if (!impl->ctx)
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return;
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impl->queue.reserve(impl->queue.size() + sample_count * 2);
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std::copy(samples, samples + sample_count * 2, std::back_inserter(impl->queue));
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}
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size_t CubebSink::SamplesInQueue() const {
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if (!impl->ctx)
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return 0;
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return impl->queue.size() / 2;
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}
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void CubebSink::SetDevice(int device_id) {}
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long CubebSink::Impl::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer,
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void* output_buffer, long num_frames) {
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Impl* impl = static_cast<Impl*>(user_data);
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u8* buffer = reinterpret_cast<u8*>(output_buffer);
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if (!impl)
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return 0;
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size_t frames_to_write = std::min(impl->queue.size() / 2, static_cast<size_t>(num_frames));
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memcpy(buffer, impl->queue.data(), frames_to_write * sizeof(s16) * 2);
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impl->queue.erase(impl->queue.begin(), impl->queue.begin() + frames_to_write * 2);
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if (frames_to_write < num_frames) {
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// Fill the rest of the frames with silence
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memset(buffer + frames_to_write * sizeof(s16) * 2, 0,
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(num_frames - frames_to_write) * sizeof(s16) * 2);
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}
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return num_frames;
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}
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void CubebSink::Impl::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {}
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} // namespace AudioCore
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