137 lines
4 KiB
C++
137 lines
4 KiB
C++
// Copyright 2023 Citra Emulator Project
|
|
// Licensed under GPLv2 or any later version
|
|
// Refer to the license.txt file included.
|
|
|
|
#include <utility>
|
|
#include <vector>
|
|
#include <AL/al.h>
|
|
#include <AL/alc.h>
|
|
#include "audio_core/input.h"
|
|
#include "audio_core/openal_input.h"
|
|
#include "audio_core/sink.h"
|
|
#include "common/logging/log.h"
|
|
|
|
namespace AudioCore {
|
|
|
|
struct OpenALInput::Impl {
|
|
ALCdevice* device = nullptr;
|
|
u8 sample_size_in_bytes = 0;
|
|
};
|
|
|
|
OpenALInput::OpenALInput(std::string device_id)
|
|
: impl(std::make_unique<Impl>()), device_id(std::move(device_id)) {}
|
|
|
|
OpenALInput::~OpenALInput() {
|
|
StopSampling();
|
|
}
|
|
|
|
void OpenALInput::StartSampling(const InputParameters& params) {
|
|
if (IsSampling()) {
|
|
return;
|
|
}
|
|
|
|
// OpenAL supports unsigned 8-bit and signed 16-bit PCM.
|
|
// TODO: Re-sample the stream.
|
|
if ((params.sample_size == 8 && params.sign == Signedness::Signed) ||
|
|
(params.sample_size == 16 && params.sign == Signedness::Unsigned)) {
|
|
LOG_WARNING(Audio, "Application requested unsupported unsigned PCM format. Falling back to "
|
|
"supported format.");
|
|
}
|
|
|
|
parameters = params;
|
|
impl->sample_size_in_bytes = params.sample_size / 8;
|
|
|
|
auto format = params.sample_size == 16 ? AL_FORMAT_MONO16 : AL_FORMAT_MONO8;
|
|
impl->device = alcCaptureOpenDevice(
|
|
device_id != auto_device_name && !device_id.empty() ? device_id.c_str() : nullptr,
|
|
params.sample_rate, format, static_cast<ALsizei>(params.buffer_size));
|
|
auto open_error = alcGetError(impl->device);
|
|
if (impl->device == nullptr || open_error != ALC_NO_ERROR) {
|
|
LOG_CRITICAL(Audio, "alcCaptureOpenDevice failed: {}", open_error);
|
|
StopSampling();
|
|
return;
|
|
}
|
|
|
|
alcCaptureStart(impl->device);
|
|
auto capture_error = alcGetError(impl->device);
|
|
if (capture_error != ALC_NO_ERROR) {
|
|
LOG_CRITICAL(Audio, "alcCaptureStart failed: {}", capture_error);
|
|
StopSampling();
|
|
return;
|
|
}
|
|
}
|
|
|
|
void OpenALInput::StopSampling() {
|
|
if (impl->device) {
|
|
alcCaptureStop(impl->device);
|
|
alcCaptureCloseDevice(impl->device);
|
|
impl->device = nullptr;
|
|
}
|
|
}
|
|
|
|
bool OpenALInput::IsSampling() {
|
|
return impl->device != nullptr;
|
|
}
|
|
|
|
void OpenALInput::AdjustSampleRate(u32 sample_rate) {
|
|
if (!IsSampling()) {
|
|
return;
|
|
}
|
|
|
|
auto new_params = parameters;
|
|
new_params.sample_rate = sample_rate;
|
|
StopSampling();
|
|
StartSampling(new_params);
|
|
}
|
|
|
|
Samples OpenALInput::Read() {
|
|
if (!IsSampling()) {
|
|
return {};
|
|
}
|
|
|
|
ALCint samples_captured = 0;
|
|
alcGetIntegerv(impl->device, ALC_CAPTURE_SAMPLES, 1, &samples_captured);
|
|
auto error = alcGetError(impl->device);
|
|
if (error != ALC_NO_ERROR) {
|
|
LOG_WARNING(Audio, "alcGetIntegerv(ALC_CAPTURE_SAMPLES) failed: {}", error);
|
|
return {};
|
|
}
|
|
|
|
auto num_samples = std::min(samples_captured, static_cast<ALsizei>(parameters.buffer_size /
|
|
impl->sample_size_in_bytes));
|
|
Samples samples(num_samples * impl->sample_size_in_bytes);
|
|
|
|
alcCaptureSamples(impl->device, samples.data(), num_samples);
|
|
error = alcGetError(impl->device);
|
|
if (error != ALC_NO_ERROR) {
|
|
LOG_WARNING(Audio, "alcCaptureSamples failed: {}", error);
|
|
return {};
|
|
}
|
|
|
|
return samples;
|
|
}
|
|
|
|
std::vector<std::string> ListOpenALInputDevices() {
|
|
const char* devices_str;
|
|
if (alcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT") != AL_FALSE) {
|
|
devices_str = alcGetString(nullptr, ALC_CAPTURE_DEVICE_SPECIFIER);
|
|
} else {
|
|
LOG_WARNING(
|
|
Audio,
|
|
"Missing OpenAL device enumeration extensions, cannot list audio capture devices.");
|
|
return {};
|
|
}
|
|
|
|
if (!devices_str || *devices_str == '\0') {
|
|
return {};
|
|
}
|
|
|
|
std::vector<std::string> device_list;
|
|
while (*devices_str != '\0') {
|
|
device_list.emplace_back(devices_str);
|
|
devices_str += strlen(devices_str) + 1;
|
|
}
|
|
return device_list;
|
|
}
|
|
|
|
} // namespace AudioCore
|