diff options
Diffstat (limited to '')
-rw-r--r-- | src/audio_core/CMakeLists.txt | 11 | ||||
-rw-r--r-- | src/audio_core/sdl2_sink.cpp | 126 | ||||
-rw-r--r-- | src/audio_core/sdl2_sink.h | 30 | ||||
-rw-r--r-- | src/audio_core/sink.h | 2 | ||||
-rw-r--r-- | src/audio_core/sink_details.cpp | 7 |
5 files changed, 175 insertions, 1 deletions
diff --git a/src/audio_core/CMakeLists.txt b/src/audio_core/CMakeLists.txt index 5a2747e78..899155a30 100644 --- a/src/audio_core/CMakeLists.txt +++ b/src/audio_core/CMakeLists.txt @@ -23,7 +23,18 @@ set(HEADERS include_directories(../../externals/soundtouch/include) +if(SDL2_FOUND) + set(SRCS ${SRCS} sdl2_sink.cpp) + set(HEADERS ${HEADERS} sdl2_sink.h) + include_directories(${SDL2_INCLUDE_DIR}) +endif() + create_directory_groups(${SRCS} ${HEADERS}) add_library(audio_core STATIC ${SRCS} ${HEADERS}) target_link_libraries(audio_core SoundTouch) + +if(SDL2_FOUND) + target_link_libraries(audio_core ${SDL2_LIBRARY}) + set_property(TARGET audio_core APPEND PROPERTY COMPILE_DEFINITIONS HAVE_SDL2) +endif() diff --git a/src/audio_core/sdl2_sink.cpp b/src/audio_core/sdl2_sink.cpp new file mode 100644 index 000000000..dc75c04ee --- /dev/null +++ b/src/audio_core/sdl2_sink.cpp @@ -0,0 +1,126 @@ +// Copyright 2016 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <list> +#include <vector> + +#include <SDL.h> + +#include "audio_core/audio_core.h" +#include "audio_core/sdl2_sink.h" + +#include "common/assert.h" +#include "common/logging/log.h" +#include <numeric> + +namespace AudioCore { + +struct SDL2Sink::Impl { + unsigned int sample_rate = 0; + + SDL_AudioDeviceID audio_device_id = 0; + + std::list<std::vector<s16>> queue; + + static void Callback(void* impl_, u8* buffer, int buffer_size_in_bytes); +}; + +SDL2Sink::SDL2Sink() : impl(std::make_unique<Impl>()) { + if (SDL_Init(SDL_INIT_AUDIO) < 0) { + LOG_CRITICAL(Audio_Sink, "SDL_Init(SDL_INIT_AUDIO) failed"); + impl->audio_device_id = 0; + return; + } + + SDL_AudioSpec desired_audiospec; + SDL_zero(desired_audiospec); + desired_audiospec.format = AUDIO_S16; + desired_audiospec.channels = 2; + desired_audiospec.freq = native_sample_rate; + desired_audiospec.samples = 1024; + desired_audiospec.userdata = impl.get(); + desired_audiospec.callback = &Impl::Callback; + + SDL_AudioSpec obtained_audiospec; + SDL_zero(obtained_audiospec); + + impl->audio_device_id = SDL_OpenAudioDevice(nullptr, false, &desired_audiospec, &obtained_audiospec, 0); + if (impl->audio_device_id <= 0) { + LOG_CRITICAL(Audio_Sink, "SDL_OpenAudioDevice failed"); + return; + } + + impl->sample_rate = obtained_audiospec.freq; + + // SDL2 audio devices start out paused, unpause it: + SDL_PauseAudioDevice(impl->audio_device_id, 0); +} + +SDL2Sink::~SDL2Sink() { + if (impl->audio_device_id <= 0) + return; + + SDL_CloseAudioDevice(impl->audio_device_id); +} + +unsigned int SDL2Sink::GetNativeSampleRate() const { + if (impl->audio_device_id <= 0) + return native_sample_rate; + + return impl->sample_rate; +} + +void SDL2Sink::EnqueueSamples(const std::vector<s16>& samples) { + if (impl->audio_device_id <= 0) + return; + + ASSERT_MSG(samples.size() % 2 == 0, "Samples must be in interleaved stereo PCM16 format (size must be a multiple of two)"); + + SDL_LockAudioDevice(impl->audio_device_id); + impl->queue.emplace_back(samples); + SDL_UnlockAudioDevice(impl->audio_device_id); +} + +size_t SDL2Sink::SamplesInQueue() const { + if (impl->audio_device_id <= 0) + return 0; + + SDL_LockAudioDevice(impl->audio_device_id); + + size_t total_size = std::accumulate(impl->queue.begin(), impl->queue.end(), static_cast<size_t>(0), + [](size_t sum, const auto& buffer) { + // Division by two because each stereo sample is made of two s16. + return sum + buffer.size() / 2; + }); + + SDL_UnlockAudioDevice(impl->audio_device_id); + + return total_size; +} + +void SDL2Sink::Impl::Callback(void* impl_, u8* buffer, int buffer_size_in_bytes) { + Impl* impl = reinterpret_cast<Impl*>(impl_); + + size_t remaining_size = static_cast<size_t>(buffer_size_in_bytes) / sizeof(s16); // Keep track of size in 16-bit increments. + + while (remaining_size > 0 && !impl->queue.empty()) { + if (impl->queue.front().size() <= remaining_size) { + memcpy(buffer, impl->queue.front().data(), impl->queue.front().size() * sizeof(s16)); + buffer += impl->queue.front().size() * sizeof(s16); + remaining_size -= impl->queue.front().size(); + impl->queue.pop_front(); + } else { + memcpy(buffer, impl->queue.front().data(), remaining_size * sizeof(s16)); + buffer += remaining_size * sizeof(s16); + impl->queue.front().erase(impl->queue.front().begin(), impl->queue.front().begin() + remaining_size); + remaining_size = 0; + } + } + + if (remaining_size > 0) { + memset(buffer, 0, remaining_size * sizeof(s16)); + } +} + +} // namespace AudioCore diff --git a/src/audio_core/sdl2_sink.h b/src/audio_core/sdl2_sink.h new file mode 100644 index 000000000..0f296b673 --- /dev/null +++ b/src/audio_core/sdl2_sink.h @@ -0,0 +1,30 @@ +// Copyright 2016 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <cstddef> +#include <memory> + +#include "audio_core/sink.h" + +namespace AudioCore { + +class SDL2Sink final : public Sink { +public: + SDL2Sink(); + ~SDL2Sink() override; + + unsigned int GetNativeSampleRate() const override; + + void EnqueueSamples(const std::vector<s16>& samples) override; + + size_t SamplesInQueue() const override; + +private: + struct Impl; + std::unique_ptr<Impl> impl; +}; + +} // namespace AudioCore diff --git a/src/audio_core/sink.h b/src/audio_core/sink.h index cad21a85e..1c881c3d2 100644 --- a/src/audio_core/sink.h +++ b/src/audio_core/sink.h @@ -19,7 +19,7 @@ public: virtual ~Sink() = default; /// The native rate of this sink. The sink expects to be fed samples that respect this. (Units: samples/sec) - virtual unsigned GetNativeSampleRate() const = 0; + virtual unsigned int GetNativeSampleRate() const = 0; /** * Feed stereo samples to sink. diff --git a/src/audio_core/sink_details.cpp b/src/audio_core/sink_details.cpp index d2cc74103..ba5e83d17 100644 --- a/src/audio_core/sink_details.cpp +++ b/src/audio_core/sink_details.cpp @@ -8,10 +8,17 @@ #include "audio_core/null_sink.h" #include "audio_core/sink_details.h" +#ifdef HAVE_SDL2 +#include "audio_core/sdl2_sink.h" +#endif + namespace AudioCore { // g_sink_details is ordered in terms of desirability, with the best choice at the top. const std::vector<SinkDetails> g_sink_details = { +#ifdef HAVE_SDL2 + { "sdl2", []() { return std::make_unique<SDL2Sink>(); } }, +#endif { "null", []() { return std::make_unique<NullSink>(); } }, }; |