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Diffstat (limited to 'src/audio_core/hle/dsp.cpp')
| -rw-r--r-- | src/audio_core/hle/dsp.cpp | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/src/audio_core/hle/dsp.cpp b/src/audio_core/hle/dsp.cpp deleted file mode 100644 index 260b182ed..000000000 --- a/src/audio_core/hle/dsp.cpp +++ /dev/null @@ -1,172 +0,0 @@ -// Copyright 2016 Citra Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <array> -#include <memory> -#include "audio_core/hle/dsp.h" -#include "audio_core/hle/mixers.h" -#include "audio_core/hle/pipe.h" -#include "audio_core/hle/source.h" -#include "audio_core/sink.h" -#include "audio_core/time_stretch.h" - -namespace DSP { -namespace HLE { - -// Region management - -DspMemory g_dsp_memory; - -static size_t CurrentRegionIndex() { - // The region with the higher frame counter is chosen unless there is wraparound. - // This function only returns a 0 or 1. - u16 frame_counter_0 = g_dsp_memory.region_0.frame_counter; - u16 frame_counter_1 = g_dsp_memory.region_1.frame_counter; - - if (frame_counter_0 == 0xFFFFu && frame_counter_1 != 0xFFFEu) { - // Wraparound has occurred. - return 1; - } - - if (frame_counter_1 == 0xFFFFu && frame_counter_0 != 0xFFFEu) { - // Wraparound has occurred. - return 0; - } - - return (frame_counter_0 > frame_counter_1) ? 0 : 1; -} - -static SharedMemory& ReadRegion() { - return CurrentRegionIndex() == 0 ? g_dsp_memory.region_0 : g_dsp_memory.region_1; -} - -static SharedMemory& WriteRegion() { - return CurrentRegionIndex() != 0 ? g_dsp_memory.region_0 : g_dsp_memory.region_1; -} - -// Audio processing and mixing - -static std::array<Source, num_sources> sources = { - Source(0), Source(1), Source(2), Source(3), Source(4), Source(5), Source(6), Source(7), - Source(8), Source(9), Source(10), Source(11), Source(12), Source(13), Source(14), Source(15), - Source(16), Source(17), Source(18), Source(19), Source(20), Source(21), Source(22), Source(23), -}; -static Mixers mixers; - -static StereoFrame16 GenerateCurrentFrame() { - SharedMemory& read = ReadRegion(); - SharedMemory& write = WriteRegion(); - - std::array<QuadFrame32, 3> intermediate_mixes = {}; - - // Generate intermediate mixes - for (size_t i = 0; i < num_sources; i++) { - write.source_statuses.status[i] = - sources[i].Tick(read.source_configurations.config[i], read.adpcm_coefficients.coeff[i]); - for (size_t mix = 0; mix < 3; mix++) { - sources[i].MixInto(intermediate_mixes[mix], mix); - } - } - - // Generate final mix - write.dsp_status = mixers.Tick(read.dsp_configuration, read.intermediate_mix_samples, - write.intermediate_mix_samples, intermediate_mixes); - - StereoFrame16 output_frame = mixers.GetOutput(); - - // Write current output frame to the shared memory region - for (size_t samplei = 0; samplei < output_frame.size(); samplei++) { - for (size_t channeli = 0; channeli < output_frame[0].size(); channeli++) { - write.final_samples.pcm16[samplei][channeli] = s16_le(output_frame[samplei][channeli]); - } - } - - return output_frame; -} - -// Audio output - -static bool perform_time_stretching = true; -static std::unique_ptr<AudioCore::Sink> sink; -static AudioCore::TimeStretcher time_stretcher; - -static void FlushResidualStretcherAudio() { - time_stretcher.Flush(); - while (true) { - std::vector<s16> residual_audio = time_stretcher.Process(sink->SamplesInQueue()); - if (residual_audio.empty()) - break; - sink->EnqueueSamples(residual_audio.data(), residual_audio.size() / 2); - } -} - -static void OutputCurrentFrame(const StereoFrame16& frame) { - if (perform_time_stretching) { - time_stretcher.AddSamples(&frame[0][0], frame.size()); - std::vector<s16> stretched_samples = time_stretcher.Process(sink->SamplesInQueue()); - sink->EnqueueSamples(stretched_samples.data(), stretched_samples.size() / 2); - } else { - constexpr size_t maximum_sample_latency = 2048; // about 64 miliseconds - if (sink->SamplesInQueue() > maximum_sample_latency) { - // This can occur if we're running too fast and samples are starting to back up. - // Just drop the samples. - return; - } - - sink->EnqueueSamples(&frame[0][0], frame.size()); - } -} - -void EnableStretching(bool enable) { - if (perform_time_stretching == enable) - return; - - if (!enable) { - FlushResidualStretcherAudio(); - } - perform_time_stretching = enable; -} - -// Public Interface - -void Init() { - DSP::HLE::ResetPipes(); - - for (auto& source : sources) { - source.Reset(); - } - - mixers.Reset(); - - time_stretcher.Reset(); - if (sink) { - time_stretcher.SetOutputSampleRate(sink->GetNativeSampleRate()); - } -} - -void Shutdown() { - if (perform_time_stretching) { - FlushResidualStretcherAudio(); - } -} - -bool Tick() { - StereoFrame16 current_frame = {}; - - // TODO: Check dsp::DSP semaphore (which indicates emulated application has finished writing to - // shared memory region) - current_frame = GenerateCurrentFrame(); - - OutputCurrentFrame(current_frame); - - return true; -} - -void SetSink(std::unique_ptr<AudioCore::Sink> sink_) { - sink = std::move(sink_); - time_stretcher.SetOutputSampleRate(sink->GetNativeSampleRate()); -} - -} // namespace HLE -} // namespace DSP |