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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"
#include "common/settings_enums.h"
namespace AudioCore::Sink {
namespace {
struct SinkDetails {
using FactoryFn = std::unique_ptr<Sink> (*)(std::string_view);
using ListDevicesFn = std::vector<std::string> (*)(bool);
using SuitableFn = bool (*)();
/// Name for this sink.
Settings::AudioEngine 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;
/// Check whether this backend is suitable to be used.
SuitableFn is_suitable;
};
// sink_details is ordered in terms of desirability, with the best choice at the top.
constexpr SinkDetails sink_details[] = {
#ifdef HAVE_CUBEB
SinkDetails{
Settings::AudioEngine::Cubeb,
[](std::string_view device_id) -> std::unique_ptr<Sink> {
return std::make_unique<CubebSink>(device_id);
},
&ListCubebSinkDevices,
&IsCubebSuitable,
},
#endif
#ifdef HAVE_SDL2
SinkDetails{
Settings::AudioEngine::Sdl2,
[](std::string_view device_id) -> std::unique_ptr<Sink> {
return std::make_unique<SDLSink>(device_id);
},
&ListSDLSinkDevices,
&IsSDLSuitable,
},
#endif
SinkDetails{
Settings::AudioEngine::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 true; },
},
};
const SinkDetails& GetOutputSinkDetails(Settings::AudioEngine sink_id) {
const auto find_backend{[](Settings::AudioEngine 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 == Settings::AudioEngine::Auto) {
// Auto-select a backend. Use the sink details ordering, preferring cubeb first, checking
// that the backend is available and suitable to use.
for (auto& details : sink_details) {
if (details.is_suitable()) {
iter = &details;
break;
}
}
LOG_INFO(Service_Audio, "Auto-selecting the {} backend",
Settings::CanonicalizeEnum(iter->id));
} else {
if (iter != std::end(sink_details) && !iter->is_suitable()) {
LOG_ERROR(Service_Audio, "Selected backend {} is not suitable, falling back to null",
Settings::CanonicalizeEnum(iter->id));
iter = find_backend(Settings::AudioEngine::Null);
}
}
if (iter == std::end(sink_details)) {
LOG_ERROR(Audio, "Invalid sink_id {}", Settings::CanonicalizeEnum(sink_id));
iter = find_backend(Settings::AudioEngine::Null);
}
return *iter;
}
} // Anonymous namespace
std::vector<Settings::AudioEngine> GetSinkIDs() {
std::vector<Settings::AudioEngine> 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(Settings::AudioEngine sink_id, bool capture) {
return GetOutputSinkDetails(sink_id).list_devices(capture);
}
std::unique_ptr<Sink> CreateSinkFromID(Settings::AudioEngine sink_id, std::string_view device_id) {
return GetOutputSinkDetails(sink_id).factory(device_id);
}
} // namespace AudioCore::Sink
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