Choose the SDL audio backend when Cubeb reports too high of a latency

This commit is contained in:
Kelebek1 2022-10-08 19:27:54 +01:00
parent 61883d8820
commit 8c9e238a7b
7 changed files with 95 additions and 32 deletions

View file

@ -66,10 +66,10 @@ public:
const auto latency_error = cubeb_get_min_latency(ctx, &params, &minimum_latency);
if (latency_error != CUBEB_OK) {
LOG_CRITICAL(Audio_Sink, "Error getting minimum latency, error: {}", latency_error);
minimum_latency = 256U;
minimum_latency = TargetSampleCount * 2;
}
minimum_latency = std::max(minimum_latency, 256u);
minimum_latency = std::max(minimum_latency, TargetSampleCount * 2);
LOG_INFO(Service_Audio,
"Opening cubeb stream {} type {} with: rate {} channels {} (system channels {}) "
@ -326,4 +326,31 @@ std::vector<std::string> ListCubebSinkDevices(bool capture) {
return device_list;
}
u32 GetCubebLatency() {
cubeb* ctx;
if (cubeb_init(&ctx, "yuzu Latency Getter", nullptr) != CUBEB_OK) {
LOG_CRITICAL(Audio_Sink, "cubeb_init failed");
// Return a large latency so we choose SDL instead.
return 10000u;
}
cubeb_stream_params params{};
params.rate = TargetSampleRate;
params.channels = 2;
params.format = CUBEB_SAMPLE_S16LE;
params.prefs = CUBEB_STREAM_PREF_NONE;
params.layout = CUBEB_LAYOUT_STEREO;
u32 latency{0};
const auto latency_error = cubeb_get_min_latency(ctx, &params, &latency);
if (latency_error != CUBEB_OK) {
LOG_CRITICAL(Audio_Sink, "Error getting minimum latency, error: {}", latency_error);
latency = TargetSampleCount * 2;
}
latency = std::max(latency, TargetSampleCount * 2);
cubeb_destroy(ctx);
return latency;
}
} // namespace AudioCore::Sink

View file

@ -96,4 +96,11 @@ private:
*/
std::vector<std::string> ListCubebSinkDevices(bool capture);
/**
* Get the reported latency for this sink.
*
* @return Minimum latency for this sink.
*/
u32 GetCubebLatency();
} // namespace AudioCore::Sink

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@ -47,11 +47,7 @@ public:
spec.freq = TargetSampleRate;
spec.channels = static_cast<u8>(device_channels);
spec.format = AUDIO_S16SYS;
if (type == StreamType::Render) {
spec.samples = TargetSampleCount;
} else {
spec.samples = 1024;
}
spec.samples = TargetSampleCount * 2;
spec.callback = &SDLSinkStream::DataCallback;
spec.userdata = this;
@ -240,4 +236,8 @@ std::vector<std::string> ListSDLSinkDevices(bool capture) {
return device_list;
}
u32 GetSDLLatency() {
return TargetSampleCount * 2;
}
} // namespace AudioCore::Sink

View file

@ -87,4 +87,11 @@ private:
*/
std::vector<std::string> ListSDLSinkDevices(bool capture);
/**
* Get the reported latency for this sink.
*
* @return Minimum latency for this sink.
*/
u32 GetSDLLatency();
} // namespace AudioCore::Sink

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@ -21,58 +21,80 @@ 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.
const char* id;
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},
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},
SinkDetails{
"sdl",
[](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"}; }},
[](bool capture) { return std::vector<std::string>{"null"}; }, []() { return 0u; }},
};
const SinkDetails& GetOutputSinkDetails(std::string_view sink_id) {
auto iter =
std::find_if(std::begin(sink_details), std::end(sink_details),
[sink_id](const auto& sink_detail) { return sink_detail.id == 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; });
}};
if (sink_id == "auto" || iter == std::end(sink_details)) {
if (sink_id != "auto") {
LOG_ERROR(Audio, "Invalid sink_id {}", sink_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("sdl");
}
// Auto-select.
// sink_details is ordered in terms of desirability, with the best choice at the front.
#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<const char*> GetSinkIDs() {
std::vector<const char*> sink_ids(std::size(sink_details));
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; });

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@ -19,7 +19,7 @@ class Sink;
*
* @return Vector of available sink names.
*/
std::vector<const char*> GetSinkIDs();
std::vector<std::string_view> GetSinkIDs();
/**
* Gets the list of devices for a particular sink identified by the given ID.

View file

@ -161,8 +161,8 @@ void ConfigureAudio::InitializeAudioSinkComboBox() {
ui->sink_combo_box->clear();
ui->sink_combo_box->addItem(QString::fromUtf8(AudioCore::Sink::auto_device_name));
for (const char* id : AudioCore::Sink::GetSinkIDs()) {
ui->sink_combo_box->addItem(QString::fromUtf8(id));
for (const auto& id : AudioCore::Sink::GetSinkIDs()) {
ui->sink_combo_box->addItem(QString::fromUtf8(id.data(), static_cast<s32>(id.length())));
}
}