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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <algorithm>
#include <memory>
#include <string>
#include <vector>
#include "audio_core/sink/sink_details.h"
#ifdef HAVE_CUBEB
#include "audio_core/sink/cubeb_sink.h"
#endif
#ifdef HAVE_SDL2
#include "audio_core/sink/sdl2_sink.h"
#endif
#include "audio_core/sink/null_sink.h"
#include "common/logging/log.h"
namespace AudioCore::Sink {
namespace {
struct SinkDetails {
using FactoryFn = std::unique_ptr<Sink> (*)(std::string_view);
using ListDevicesFn = std::vector<std::string> (*)(bool);
using LatencyFn = u32 (*)();
/// Name for this sink.
std::string_view id;
/// A method to call to construct an instance of this type of sink.
FactoryFn factory;
/// A method to call to list available devices.
ListDevicesFn list_devices;
/// Method to get the latency of this backend.
LatencyFn latency;
};
// sink_details is ordered in terms of desirability, with the best choice at the top.
constexpr SinkDetails sink_details[] = {
#ifdef HAVE_CUBEB
SinkDetails{
"cubeb",
[](std::string_view device_id) -> std::unique_ptr<Sink> {
return std::make_unique<CubebSink>(device_id);
},
&ListCubebSinkDevices,
&GetCubebLatency,
},
#endif
#ifdef HAVE_SDL2
SinkDetails{
"sdl2",
[](std::string_view device_id) -> std::unique_ptr<Sink> {
return std::make_unique<SDLSink>(device_id);
},
&ListSDLSinkDevices,
&GetSDLLatency,
},
#endif
SinkDetails{"null",
[](std::string_view device_id) -> std::unique_ptr<Sink> {
return std::make_unique<NullSink>(device_id);
},
[](bool capture) { return std::vector<std::string>{"null"}; }, []() { return 0u; }},
};
const SinkDetails& GetOutputSinkDetails(std::string_view sink_id) {
const auto find_backend{[](std::string_view id) {
return std::find_if(std::begin(sink_details), std::end(sink_details),
[&id](const auto& sink_detail) { return sink_detail.id == id; });
}};
auto iter = find_backend(sink_id);
if (sink_id == "auto") {
// Auto-select a backend. Prefer CubeB, but it may report a large minimum latency which
// causes audio issues, in that case go with SDL.
#if defined(HAVE_CUBEB) && defined(HAVE_SDL2)
iter = find_backend("cubeb");
if (iter->latency() > TargetSampleCount * 3) {
iter = find_backend("sdl2");
}
#else
iter = std::begin(sink_details);
#endif
LOG_INFO(Service_Audio, "Auto-selecting the {} backend", iter->id);
}
if (iter == std::end(sink_details)) {
LOG_ERROR(Audio, "Invalid sink_id {}", sink_id);
iter = find_backend("null");
}
return *iter;
}
} // Anonymous namespace
std::vector<std::string_view> GetSinkIDs() {
std::vector<std::string_view> sink_ids(std::size(sink_details));
std::transform(std::begin(sink_details), std::end(sink_details), std::begin(sink_ids),
[](const auto& sink) { return sink.id; });
return sink_ids;
}
std::vector<std::string> GetDeviceListForSink(std::string_view sink_id, bool capture) {
return GetOutputSinkDetails(sink_id).list_devices(capture);
}
std::unique_ptr<Sink> CreateSinkFromID(std::string_view sink_id, std::string_view device_id) {
return GetOutputSinkDetails(sink_id).factory(device_id);
}
} // namespace AudioCore::Sink
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