diff options
Diffstat (limited to 'src/audio_core')
-rw-r--r-- | src/audio_core/CMakeLists.txt | 3 | ||||
-rw-r--r-- | src/audio_core/algorithm/filter.cpp | 12 | ||||
-rw-r--r-- | src/audio_core/algorithm/filter.h | 4 | ||||
-rw-r--r-- | src/audio_core/algorithm/interpolate.cpp | 12 | ||||
-rw-r--r-- | src/audio_core/algorithm/interpolate.h | 4 | ||||
-rw-r--r-- | src/audio_core/audio_out.cpp | 3 | ||||
-rw-r--r-- | src/audio_core/audio_out.h | 2 | ||||
-rw-r--r-- | src/audio_core/audio_renderer.cpp | 24 | ||||
-rw-r--r-- | src/audio_core/audio_renderer.h | 8 | ||||
-rw-r--r-- | src/audio_core/codec.cpp | 20 | ||||
-rw-r--r-- | src/audio_core/codec.h | 2 | ||||
-rw-r--r-- | src/audio_core/cubeb_sink.cpp | 129 | ||||
-rw-r--r-- | src/audio_core/null_sink.h | 6 | ||||
-rw-r--r-- | src/audio_core/sink_details.cpp | 2 | ||||
-rw-r--r-- | src/audio_core/sink_details.h | 4 | ||||
-rw-r--r-- | src/audio_core/sink_stream.h | 4 | ||||
-rw-r--r-- | src/audio_core/stream.cpp | 11 | ||||
-rw-r--r-- | src/audio_core/stream.h | 4 | ||||
-rw-r--r-- | src/audio_core/time_stretch.cpp | 69 | ||||
-rw-r--r-- | src/audio_core/time_stretch.h | 36 |
20 files changed, 250 insertions, 109 deletions
diff --git a/src/audio_core/CMakeLists.txt b/src/audio_core/CMakeLists.txt index 82e4850f7..c381dbe1d 100644 --- a/src/audio_core/CMakeLists.txt +++ b/src/audio_core/CMakeLists.txt @@ -17,6 +17,8 @@ add_library(audio_core STATIC sink_stream.h stream.cpp stream.h + time_stretch.cpp + time_stretch.h $<$<BOOL:${ENABLE_CUBEB}>:cubeb_sink.cpp cubeb_sink.h> ) @@ -24,6 +26,7 @@ add_library(audio_core STATIC create_target_directory_groups(audio_core) target_link_libraries(audio_core PUBLIC common core) +target_link_libraries(audio_core PRIVATE SoundTouch) if(ENABLE_CUBEB) target_link_libraries(audio_core PRIVATE cubeb) diff --git a/src/audio_core/algorithm/filter.cpp b/src/audio_core/algorithm/filter.cpp index 9fcd0614d..f65bf64f7 100644 --- a/src/audio_core/algorithm/filter.cpp +++ b/src/audio_core/algorithm/filter.cpp @@ -35,12 +35,12 @@ Filter::Filter(double a0, double a1, double a2, double b0, double b1, double b2) : a1(a1 / a0), a2(a2 / a0), b0(b0 / a0), b1(b1 / a0), b2(b2 / a0) {} void Filter::Process(std::vector<s16>& signal) { - const size_t num_frames = signal.size() / 2; - for (size_t i = 0; i < num_frames; i++) { + const std::size_t num_frames = signal.size() / 2; + for (std::size_t i = 0; i < num_frames; i++) { std::rotate(in.begin(), in.end() - 1, in.end()); std::rotate(out.begin(), out.end() - 1, out.end()); - for (size_t ch = 0; ch < channel_count; ch++) { + for (std::size_t ch = 0; ch < channel_count; ch++) { in[0][ch] = signal[i * channel_count + ch]; out[0][ch] = b0 * in[0][ch] + b1 * in[1][ch] + b2 * in[2][ch] - a1 * out[1][ch] - @@ -54,14 +54,14 @@ void Filter::Process(std::vector<s16>& signal) { /// Calculates the appropriate Q for each biquad in a cascading filter. /// @param total_count The total number of biquads to be cascaded. /// @param index 0-index of the biquad to calculate the Q value for. -static double CascadingBiquadQ(size_t total_count, size_t index) { +static double CascadingBiquadQ(std::size_t total_count, std::size_t index) { const double pole = M_PI * (2 * index + 1) / (4.0 * total_count); return 1.0 / (2.0 * std::cos(pole)); } -CascadingFilter CascadingFilter::LowPass(double cutoff, size_t cascade_size) { +CascadingFilter CascadingFilter::LowPass(double cutoff, std::size_t cascade_size) { std::vector<Filter> cascade(cascade_size); - for (size_t i = 0; i < cascade_size; i++) { + for (std::size_t i = 0; i < cascade_size; i++) { cascade[i] = Filter::LowPass(cutoff, CascadingBiquadQ(cascade_size, i)); } return CascadingFilter{std::move(cascade)}; diff --git a/src/audio_core/algorithm/filter.h b/src/audio_core/algorithm/filter.h index a41beef98..3546d149b 100644 --- a/src/audio_core/algorithm/filter.h +++ b/src/audio_core/algorithm/filter.h @@ -30,7 +30,7 @@ public: void Process(std::vector<s16>& signal); private: - static constexpr size_t channel_count = 2; + static constexpr std::size_t channel_count = 2; /// Coefficients are in normalized form (a0 = 1.0). double a1, a2, b0, b1, b2; @@ -46,7 +46,7 @@ public: /// Creates a cascading low-pass filter. /// @param cutoff Determines the cutoff frequency. A value from 0.0 to 1.0. /// @param cascade_size Number of biquads in cascade. - static CascadingFilter LowPass(double cutoff, size_t cascade_size); + static CascadingFilter LowPass(double cutoff, std::size_t cascade_size); /// Passthrough. CascadingFilter(); diff --git a/src/audio_core/algorithm/interpolate.cpp b/src/audio_core/algorithm/interpolate.cpp index 11459821f..3aea9b0f2 100644 --- a/src/audio_core/algorithm/interpolate.cpp +++ b/src/audio_core/algorithm/interpolate.cpp @@ -14,7 +14,7 @@ namespace AudioCore { /// The Lanczos kernel -static double Lanczos(size_t a, double x) { +static double Lanczos(std::size_t a, double x) { if (x == 0.0) return 1.0; const double px = M_PI * x; @@ -37,15 +37,15 @@ std::vector<s16> Interpolate(InterpolationState& state, std::vector<s16> input, } state.nyquist.Process(input); - constexpr size_t taps = InterpolationState::lanczos_taps; - const size_t num_frames = input.size() / 2; + constexpr std::size_t taps = InterpolationState::lanczos_taps; + const std::size_t num_frames = input.size() / 2; std::vector<s16> output; - output.reserve(static_cast<size_t>(input.size() / ratio + 4)); + output.reserve(static_cast<std::size_t>(input.size() / ratio + 4)); double& pos = state.position; auto& h = state.history; - for (size_t i = 0; i < num_frames; ++i) { + for (std::size_t i = 0; i < num_frames; ++i) { std::rotate(h.begin(), h.end() - 1, h.end()); h[0][0] = input[i * 2 + 0]; h[0][1] = input[i * 2 + 1]; @@ -53,7 +53,7 @@ std::vector<s16> Interpolate(InterpolationState& state, std::vector<s16> input, while (pos <= 1.0) { double l = 0.0; double r = 0.0; - for (size_t j = 0; j < h.size(); j++) { + for (std::size_t j = 0; j < h.size(); j++) { l += Lanczos(taps, pos + j - taps + 1) * h[j][0]; r += Lanczos(taps, pos + j - taps + 1) * h[j][1]; } diff --git a/src/audio_core/algorithm/interpolate.h b/src/audio_core/algorithm/interpolate.h index c79c2eef4..edbd6460f 100644 --- a/src/audio_core/algorithm/interpolate.h +++ b/src/audio_core/algorithm/interpolate.h @@ -12,8 +12,8 @@ namespace AudioCore { struct InterpolationState { - static constexpr size_t lanczos_taps = 4; - static constexpr size_t history_size = lanczos_taps * 2 - 1; + static constexpr std::size_t lanczos_taps = 4; + static constexpr std::size_t history_size = lanczos_taps * 2 - 1; double current_ratio = 0.0; CascadingFilter nyquist; diff --git a/src/audio_core/audio_out.cpp b/src/audio_core/audio_out.cpp index 12632a95c..0c8f5b18e 100644 --- a/src/audio_core/audio_out.cpp +++ b/src/audio_core/audio_out.cpp @@ -39,7 +39,8 @@ StreamPtr AudioOut::OpenStream(u32 sample_rate, u32 num_channels, std::string&& sink->AcquireSinkStream(sample_rate, num_channels, name), std::move(name)); } -std::vector<Buffer::Tag> AudioOut::GetTagsAndReleaseBuffers(StreamPtr stream, size_t max_count) { +std::vector<Buffer::Tag> AudioOut::GetTagsAndReleaseBuffers(StreamPtr stream, + std::size_t max_count) { return stream->GetTagsAndReleaseBuffers(max_count); } diff --git a/src/audio_core/audio_out.h b/src/audio_core/audio_out.h index 39b7e656b..df9607ac7 100644 --- a/src/audio_core/audio_out.h +++ b/src/audio_core/audio_out.h @@ -25,7 +25,7 @@ public: Stream::ReleaseCallback&& release_callback); /// Returns a vector of recently released buffers specified by tag for the specified stream - std::vector<Buffer::Tag> GetTagsAndReleaseBuffers(StreamPtr stream, size_t max_count); + std::vector<Buffer::Tag> GetTagsAndReleaseBuffers(StreamPtr stream, std::size_t max_count); /// Starts an audio stream for playback void StartStream(StreamPtr stream); diff --git a/src/audio_core/audio_renderer.cpp b/src/audio_core/audio_renderer.cpp index a75cd3be5..ed3b7defc 100644 --- a/src/audio_core/audio_renderer.cpp +++ b/src/audio_core/audio_renderer.cpp @@ -52,8 +52,8 @@ std::vector<u8> AudioRenderer::UpdateAudioRenderer(const std::vector<u8>& input_ memory_pool_count * sizeof(MemoryPoolInfo)); // Copy VoiceInfo structs - size_t offset{sizeof(UpdateDataHeader) + config.behavior_size + config.memory_pools_size + - config.voice_resource_size}; + std::size_t offset{sizeof(UpdateDataHeader) + config.behavior_size + config.memory_pools_size + + config.voice_resource_size}; for (auto& voice : voices) { std::memcpy(&voice.Info(), input_params.data() + offset, sizeof(VoiceInfo)); offset += sizeof(VoiceInfo); @@ -72,7 +72,7 @@ std::vector<u8> AudioRenderer::UpdateAudioRenderer(const std::vector<u8>& input_ // Update memory pool state std::vector<MemoryPoolEntry> memory_pool(memory_pool_count); - for (size_t index = 0; index < memory_pool.size(); ++index) { + for (std::size_t index = 0; index < memory_pool.size(); ++index) { if (mem_pool_info[index].pool_state == MemoryPoolStates::RequestAttach) { memory_pool[index].state = MemoryPoolStates::Attached; } else if (mem_pool_info[index].pool_state == MemoryPoolStates::RequestDetach) { @@ -93,7 +93,7 @@ std::vector<u8> AudioRenderer::UpdateAudioRenderer(const std::vector<u8>& input_ response_data.memory_pools_size); // Copy output voice status - size_t voice_out_status_offset{sizeof(UpdateDataHeader) + response_data.memory_pools_size}; + std::size_t voice_out_status_offset{sizeof(UpdateDataHeader) + response_data.memory_pools_size}; for (const auto& voice : voices) { std::memcpy(output_params.data() + voice_out_status_offset, &voice.GetOutStatus(), sizeof(VoiceOutStatus)); @@ -103,12 +103,12 @@ std::vector<u8> AudioRenderer::UpdateAudioRenderer(const std::vector<u8>& input_ return output_params; } -void AudioRenderer::VoiceState::SetWaveIndex(size_t index) { +void AudioRenderer::VoiceState::SetWaveIndex(std::size_t index) { wave_index = index & 3; is_refresh_pending = true; } -std::vector<s16> AudioRenderer::VoiceState::DequeueSamples(size_t sample_count) { +std::vector<s16> AudioRenderer::VoiceState::DequeueSamples(std::size_t sample_count) { if (!IsPlaying()) { return {}; } @@ -117,9 +117,9 @@ std::vector<s16> AudioRenderer::VoiceState::DequeueSamples(size_t sample_count) RefreshBuffer(); } - const size_t max_size{samples.size() - offset}; - const size_t dequeue_offset{offset}; - size_t size{sample_count * STREAM_NUM_CHANNELS}; + const std::size_t max_size{samples.size() - offset}; + const std::size_t dequeue_offset{offset}; + std::size_t size{sample_count * STREAM_NUM_CHANNELS}; if (size > max_size) { size = max_size; } @@ -184,7 +184,7 @@ void AudioRenderer::VoiceState::RefreshBuffer() { case 1: // 1 channel is upsampled to 2 channel samples.resize(new_samples.size() * 2); - for (size_t index = 0; index < new_samples.size(); ++index) { + for (std::size_t index = 0; index < new_samples.size(); ++index) { samples[index * 2] = new_samples[index]; samples[index * 2 + 1] = new_samples[index]; } @@ -210,7 +210,7 @@ static constexpr s16 ClampToS16(s32 value) { } void AudioRenderer::QueueMixedBuffer(Buffer::Tag tag) { - constexpr size_t BUFFER_SIZE{512}; + constexpr std::size_t BUFFER_SIZE{512}; std::vector<s16> buffer(BUFFER_SIZE * stream->GetNumChannels()); for (auto& voice : voices) { @@ -218,7 +218,7 @@ void AudioRenderer::QueueMixedBuffer(Buffer::Tag tag) { continue; } - size_t offset{}; + std::size_t offset{}; s64 samples_remaining{BUFFER_SIZE}; while (samples_remaining > 0) { const std::vector<s16> samples{voice.DequeueSamples(samples_remaining)}; diff --git a/src/audio_core/audio_renderer.h b/src/audio_core/audio_renderer.h index 6d069d693..c8d2cd188 100644 --- a/src/audio_core/audio_renderer.h +++ b/src/audio_core/audio_renderer.h @@ -184,16 +184,16 @@ private: return info; } - void SetWaveIndex(size_t index); - std::vector<s16> DequeueSamples(size_t sample_count); + void SetWaveIndex(std::size_t index); + std::vector<s16> DequeueSamples(std::size_t sample_count); void UpdateState(); void RefreshBuffer(); private: bool is_in_use{}; bool is_refresh_pending{}; - size_t wave_index{}; - size_t offset{}; + std::size_t wave_index{}; + std::size_t offset{}; Codec::ADPCMState adpcm_state{}; InterpolationState interp_state{}; std::vector<s16> samples; diff --git a/src/audio_core/codec.cpp b/src/audio_core/codec.cpp index c3021403f..454de798b 100644 --- a/src/audio_core/codec.cpp +++ b/src/audio_core/codec.cpp @@ -8,27 +8,27 @@ namespace AudioCore::Codec { -std::vector<s16> DecodeADPCM(const u8* const data, size_t size, const ADPCM_Coeff& coeff, +std::vector<s16> DecodeADPCM(const u8* const data, std::size_t size, const ADPCM_Coeff& coeff, ADPCMState& state) { // GC-ADPCM with scale factor and variable coefficients. // Frames are 8 bytes long containing 14 samples each. // Samples are 4 bits (one nibble) long. - constexpr size_t FRAME_LEN = 8; - constexpr size_t SAMPLES_PER_FRAME = 14; + constexpr std::size_t FRAME_LEN = 8; + constexpr std::size_t SAMPLES_PER_FRAME = 14; constexpr std::array<int, 16> SIGNED_NIBBLES = { {0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1}}; - const size_t sample_count = (size / FRAME_LEN) * SAMPLES_PER_FRAME; - const size_t ret_size = + const std::size_t sample_count = (size / FRAME_LEN) * SAMPLES_PER_FRAME; + const std::size_t ret_size = sample_count % 2 == 0 ? sample_count : sample_count + 1; // Ensure multiple of two. std::vector<s16> ret(ret_size); int yn1 = state.yn1, yn2 = state.yn2; - const size_t NUM_FRAMES = + const std::size_t NUM_FRAMES = (sample_count + (SAMPLES_PER_FRAME - 1)) / SAMPLES_PER_FRAME; // Round up. - for (size_t framei = 0; framei < NUM_FRAMES; framei++) { + for (std::size_t framei = 0; framei < NUM_FRAMES; framei++) { const int frame_header = data[framei * FRAME_LEN]; const int scale = 1 << (frame_header & 0xF); const int idx = (frame_header >> 4) & 0x7; @@ -53,9 +53,9 @@ std::vector<s16> DecodeADPCM(const u8* const data, size_t size, const ADPCM_Coef return static_cast<s16>(val); }; - size_t outputi = framei * SAMPLES_PER_FRAME; - size_t datai = framei * FRAME_LEN + 1; - for (size_t i = 0; i < SAMPLES_PER_FRAME && outputi < sample_count; i += 2) { + std::size_t outputi = framei * SAMPLES_PER_FRAME; + std::size_t datai = framei * FRAME_LEN + 1; + for (std::size_t i = 0; i < SAMPLES_PER_FRAME && outputi < sample_count; i += 2) { const s16 sample1 = decode_sample(SIGNED_NIBBLES[data[datai] >> 4]); ret[outputi] = sample1; outputi++; diff --git a/src/audio_core/codec.h b/src/audio_core/codec.h index 3f845c42c..ef2ce01a8 100644 --- a/src/audio_core/codec.h +++ b/src/audio_core/codec.h @@ -38,7 +38,7 @@ using ADPCM_Coeff = std::array<s16, 16>; * @param state ADPCM state, this is updated with new state * @return Decoded stereo signed PCM16 data, sample_count in length */ -std::vector<s16> DecodeADPCM(const u8* const data, size_t size, const ADPCM_Coeff& coeff, +std::vector<s16> DecodeADPCM(const u8* const data, std::size_t size, const ADPCM_Coeff& coeff, ADPCMState& state); }; // namespace AudioCore::Codec diff --git a/src/audio_core/cubeb_sink.cpp b/src/audio_core/cubeb_sink.cpp index 5a1177d0c..392039688 100644 --- a/src/audio_core/cubeb_sink.cpp +++ b/src/audio_core/cubeb_sink.cpp @@ -3,27 +3,23 @@ // Refer to the license.txt file included. #include <algorithm> +#include <atomic> #include <cstring> -#include <mutex> - #include "audio_core/cubeb_sink.h" #include "audio_core/stream.h" +#include "audio_core/time_stretch.h" #include "common/logging/log.h" +#include "common/ring_buffer.h" +#include "core/settings.h" namespace AudioCore { -class SinkStreamImpl final : public SinkStream { +class CubebSinkStream final : public SinkStream { public: - SinkStreamImpl(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device, - const std::string& name) - : ctx{ctx}, num_channels{num_channels_} { - - if (num_channels == 6) { - // 6-channel audio does not seem to work with cubeb + SDL, so we downsample this to 2 - // channel for now - is_6_channel = true; - num_channels = 2; - } + CubebSinkStream(cubeb* ctx, u32 sample_rate, u32 num_channels_, cubeb_devid output_device, + const std::string& name) + : ctx{ctx}, num_channels{std::min(num_channels_, 2u)}, time_stretch{sample_rate, + num_channels} { cubeb_stream_params params{}; params.rate = sample_rate; @@ -38,7 +34,7 @@ public: if (cubeb_stream_init(ctx, &stream_backend, name.c_str(), nullptr, nullptr, output_device, ¶ms, std::max(512u, minimum_latency), - &SinkStreamImpl::DataCallback, &SinkStreamImpl::StateCallback, + &CubebSinkStream::DataCallback, &CubebSinkStream::StateCallback, this) != CUBEB_OK) { LOG_CRITICAL(Audio_Sink, "Error initializing cubeb stream"); return; @@ -50,7 +46,7 @@ public: } } - ~SinkStreamImpl() { + ~CubebSinkStream() { if (!ctx) { return; } @@ -62,27 +58,32 @@ public: cubeb_stream_destroy(stream_backend); } - void EnqueueSamples(u32 num_channels, const std::vector<s16>& samples) override { - if (!ctx) { + void EnqueueSamples(u32 source_num_channels, const std::vector<s16>& samples) override { + if (source_num_channels > num_channels) { + // Downsample 6 channels to 2 + std::vector<s16> buf; + buf.reserve(samples.size() * num_channels / source_num_channels); + for (std::size_t i = 0; i < samples.size(); i += source_num_channels) { + for (std::size_t ch = 0; ch < num_channels; ch++) { + buf.push_back(samples[i + ch]); + } + } + queue.Push(buf); return; } - std::lock_guard lock{queue_mutex}; + queue.Push(samples); + } - queue.reserve(queue.size() + samples.size() * GetNumChannels()); + std::size_t SamplesInQueue(u32 num_channels) const override { + if (!ctx) + return 0; - if (is_6_channel) { - // Downsample 6 channels to 2 - const size_t sample_count_copy_size = samples.size() * 2; - queue.reserve(sample_count_copy_size); - for (size_t i = 0; i < samples.size(); i += num_channels) { - queue.push_back(samples[i]); - queue.push_back(samples[i + 1]); - } - } else { - // Copy as-is - std::copy(samples.begin(), samples.end(), std::back_inserter(queue)); - } + return queue.Size() / num_channels; + } + + void Flush() override { + should_flush = true; } u32 GetNumChannels() const { @@ -95,10 +96,11 @@ private: cubeb* ctx{}; cubeb_stream* stream_backend{}; u32 num_channels{}; - bool is_6_channel{}; - std::mutex queue_mutex; - std::vector<s16> queue; + Common::RingBuffer<s16, 0x10000> queue; + std::array<s16, 2> last_frame; + std::atomic<bool> should_flush{}; + TimeStretcher time_stretch; static long DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer, void* output_buffer, long num_frames); @@ -117,10 +119,10 @@ CubebSink::CubebSink(std::string target_device_name) { LOG_WARNING(Audio_Sink, "Audio output device enumeration not supported"); } else { const auto collection_end{collection.device + collection.count}; - const auto device{std::find_if(collection.device, collection_end, - [&](const cubeb_device_info& device) { - return target_device_name == device.friendly_name; - })}; + const auto device{ + std::find_if(collection.device, collection_end, [&](const cubeb_device_info& info) { + return target_device_name == info.friendly_name; + })}; if (device != collection_end) { output_device = device->devid; } @@ -144,44 +146,59 @@ CubebSink::~CubebSink() { SinkStream& CubebSink::AcquireSinkStream(u32 sample_rate, u32 num_channels, const std::string& name) { sink_streams.push_back( - std::make_unique<SinkStreamImpl>(ctx, sample_rate, num_channels, output_device, name)); + std::make_unique<CubebSinkStream>(ctx, sample_rate, num_channels, output_device, name)); return *sink_streams.back(); } -long SinkStreamImpl::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer, - void* output_buffer, long num_frames) { - SinkStreamImpl* impl = static_cast<SinkStreamImpl*>(user_data); +long CubebSinkStream::DataCallback(cubeb_stream* stream, void* user_data, const void* input_buffer, + void* output_buffer, long num_frames) { + CubebSinkStream* impl = static_cast<CubebSinkStream*>(user_data); u8* buffer = reinterpret_cast<u8*>(output_buffer); if (!impl) { return {}; } - std::lock_guard lock{impl->queue_mutex}; - - const size_t frames_to_write{ - std::min(impl->queue.size() / impl->GetNumChannels(), static_cast<size_t>(num_frames))}; + const std::size_t num_channels = impl->GetNumChannels(); + const std::size_t samples_to_write = num_channels * num_frames; + std::size_t samples_written; + + if (Settings::values.enable_audio_stretching) { + const std::vector<s16> in{impl->queue.Pop()}; + const std::size_t num_in{in.size() / num_channels}; + s16* const out{reinterpret_cast<s16*>(buffer)}; + const std::size_t out_frames = + impl->time_stretch.Process(in.data(), num_in, out, num_frames); + samples_written = out_frames * num_channels; + + if (impl->should_flush) { + impl->time_stretch.Flush(); + impl->should_flush = false; + } + } else { + samples_written = impl->queue.Pop(buffer, samples_to_write); + } - memcpy(buffer, impl->queue.data(), frames_to_write * sizeof(s16) * impl->GetNumChannels()); - impl->queue.erase(impl->queue.begin(), - impl->queue.begin() + frames_to_write * impl->GetNumChannels()); + if (samples_written >= num_channels) { + std::memcpy(&impl->last_frame[0], buffer + (samples_written - num_channels) * sizeof(s16), + num_channels * sizeof(s16)); + } - if (frames_to_write < num_frames) { - // Fill the rest of the frames with silence - memset(buffer + frames_to_write * sizeof(s16) * impl->GetNumChannels(), 0, - (num_frames - frames_to_write) * sizeof(s16) * impl->GetNumChannels()); + // Fill the rest of the frames with last_frame + for (std::size_t i = samples_written; i < samples_to_write; i += num_channels) { + std::memcpy(buffer + i * sizeof(s16), &impl->last_frame[0], num_channels * sizeof(s16)); } return num_frames; } -void SinkStreamImpl::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {} +void CubebSinkStream::StateCallback(cubeb_stream* stream, void* user_data, cubeb_state state) {} std::vector<std::string> ListCubebSinkDevices() { std::vector<std::string> device_list; cubeb* ctx; - if (cubeb_init(&ctx, "Citra Device Enumerator", nullptr) != CUBEB_OK) { + if (cubeb_init(&ctx, "yuzu Device Enumerator", nullptr) != CUBEB_OK) { LOG_CRITICAL(Audio_Sink, "cubeb_init failed"); return {}; } @@ -190,7 +207,7 @@ std::vector<std::string> ListCubebSinkDevices() { if (cubeb_enumerate_devices(ctx, CUBEB_DEVICE_TYPE_OUTPUT, &collection) != CUBEB_OK) { LOG_WARNING(Audio_Sink, "Audio output device enumeration not supported"); } else { - for (size_t i = 0; i < collection.count; i++) { + for (std::size_t i = 0; i < collection.count; i++) { const cubeb_device_info& device = collection.device[i]; if (device.friendly_name) { device_list.emplace_back(device.friendly_name); diff --git a/src/audio_core/null_sink.h b/src/audio_core/null_sink.h index f235d93e5..a78d78893 100644 --- a/src/audio_core/null_sink.h +++ b/src/audio_core/null_sink.h @@ -21,6 +21,12 @@ public: private: struct NullSinkStreamImpl final : SinkStream { void EnqueueSamples(u32 /*num_channels*/, const std::vector<s16>& /*samples*/) override {} + + std::size_t SamplesInQueue(u32 /*num_channels*/) const override { + return 0; + } + + void Flush() override {} } null_sink_stream; }; diff --git a/src/audio_core/sink_details.cpp b/src/audio_core/sink_details.cpp index 955ba20fb..67cf1f3b2 100644 --- a/src/audio_core/sink_details.cpp +++ b/src/audio_core/sink_details.cpp @@ -24,7 +24,7 @@ const std::vector<SinkDetails> g_sink_details = { [] { return std::vector<std::string>{"null"}; }}, }; -const SinkDetails& GetSinkDetails(std::string sink_id) { +const SinkDetails& GetSinkDetails(std::string_view sink_id) { auto iter = std::find_if(g_sink_details.begin(), g_sink_details.end(), [sink_id](const auto& sink_detail) { return sink_detail.id == sink_id; }); diff --git a/src/audio_core/sink_details.h b/src/audio_core/sink_details.h index ea666c554..03534b187 100644 --- a/src/audio_core/sink_details.h +++ b/src/audio_core/sink_details.h @@ -6,6 +6,8 @@ #include <functional> #include <memory> +#include <string> +#include <string_view> #include <utility> #include <vector> @@ -30,6 +32,6 @@ struct SinkDetails { extern const std::vector<SinkDetails> g_sink_details; -const SinkDetails& GetSinkDetails(std::string sink_id); +const SinkDetails& GetSinkDetails(std::string_view sink_id); } // namespace AudioCore diff --git a/src/audio_core/sink_stream.h b/src/audio_core/sink_stream.h index 41b6736d8..4309ad094 100644 --- a/src/audio_core/sink_stream.h +++ b/src/audio_core/sink_stream.h @@ -25,6 +25,10 @@ public: * @param samples Samples in interleaved stereo PCM16 format. */ virtual void EnqueueSamples(u32 num_channels, const std::vector<s16>& samples) = 0; + + virtual std::size_t SamplesInQueue(u32 num_channels) const = 0; + + virtual void Flush() = 0; }; using SinkStreamPtr = std::unique_ptr<SinkStream>; diff --git a/src/audio_core/stream.cpp b/src/audio_core/stream.cpp index dbae75d8c..386f2ec66 100644 --- a/src/audio_core/stream.cpp +++ b/src/audio_core/stream.cpp @@ -17,7 +17,7 @@ namespace AudioCore { -constexpr size_t MaxAudioBufferCount{32}; +constexpr std::size_t MaxAudioBufferCount{32}; u32 Stream::GetNumChannels() const { switch (format) { @@ -52,7 +52,7 @@ void Stream::Stop() { } s64 Stream::GetBufferReleaseCycles(const Buffer& buffer) const { - const size_t num_samples{buffer.GetSamples().size() / GetNumChannels()}; + const std::size_t num_samples{buffer.GetSamples().size() / GetNumChannels()}; return CoreTiming::usToCycles((static_cast<u64>(num_samples) * 1000000) / sample_rate); } @@ -73,6 +73,7 @@ static void VolumeAdjustSamples(std::vector<s16>& samples) { void Stream::PlayNextBuffer() { if (!IsPlaying()) { // Ensure we are in playing state before playing the next buffer + sink_stream.Flush(); return; } @@ -83,6 +84,7 @@ void Stream::PlayNextBuffer() { if (queued_buffers.empty()) { // No queued buffers - we are effectively paused + sink_stream.Flush(); return; } @@ -90,6 +92,7 @@ void Stream::PlayNextBuffer() { queued_buffers.pop(); VolumeAdjustSamples(active_buffer->Samples()); + sink_stream.EnqueueSamples(GetNumChannels(), active_buffer->GetSamples()); CoreTiming::ScheduleEventThreadsafe(GetBufferReleaseCycles(*active_buffer), release_event, {}); @@ -119,9 +122,9 @@ bool Stream::ContainsBuffer(Buffer::Tag tag) const { return {}; } -std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(size_t max_count) { +std::vector<Buffer::Tag> Stream::GetTagsAndReleaseBuffers(std::size_t max_count) { std::vector<Buffer::Tag> tags; - for (size_t count = 0; count < max_count && !released_buffers.empty(); ++count) { + for (std::size_t count = 0; count < max_count && !released_buffers.empty(); ++count) { tags.push_back(released_buffers.front()->GetTag()); released_buffers.pop(); } diff --git a/src/audio_core/stream.h b/src/audio_core/stream.h index 049b92ca9..3a435982d 100644 --- a/src/audio_core/stream.h +++ b/src/audio_core/stream.h @@ -49,7 +49,7 @@ public: bool ContainsBuffer(Buffer::Tag tag) const; /// Returns a vector of recently released buffers specified by tag - std::vector<Buffer::Tag> GetTagsAndReleaseBuffers(size_t max_count); + std::vector<Buffer::Tag> GetTagsAndReleaseBuffers(std::size_t max_count); /// Returns true if the stream is currently playing bool IsPlaying() const { @@ -57,7 +57,7 @@ public: } /// Returns the number of queued buffers - size_t GetQueueSize() const { + std::size_t GetQueueSize() const { return queued_buffers.size(); } diff --git a/src/audio_core/time_stretch.cpp b/src/audio_core/time_stretch.cpp new file mode 100644 index 000000000..fc14151da --- /dev/null +++ b/src/audio_core/time_stretch.cpp @@ -0,0 +1,69 @@ +// Copyright 2018 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <algorithm> +#include <cmath> +#include <cstddef> +#include "audio_core/time_stretch.h" +#include "common/logging/log.h" + +namespace AudioCore { + +TimeStretcher::TimeStretcher(u32 sample_rate, u32 channel_count) + : m_sample_rate(sample_rate), m_channel_count(channel_count) { + m_sound_touch.setChannels(channel_count); + m_sound_touch.setSampleRate(sample_rate); + m_sound_touch.setPitch(1.0); + m_sound_touch.setTempo(1.0); +} + +void TimeStretcher::Clear() { + m_sound_touch.clear(); +} + +void TimeStretcher::Flush() { + m_sound_touch.flush(); +} + +std::size_t TimeStretcher::Process(const s16* in, std::size_t num_in, s16* out, + std::size_t num_out) { + const double time_delta = static_cast<double>(num_out) / m_sample_rate; // seconds + + // We were given actual_samples number of samples, and num_samples were requested from us. + double current_ratio = static_cast<double>(num_in) / static_cast<double>(num_out); + + const double max_latency = 1.0; // seconds + const double max_backlog = m_sample_rate * max_latency; + const double backlog_fullness = m_sound_touch.numSamples() / max_backlog; + if (backlog_fullness > 5.0) { + // Too many samples in backlog: Don't push anymore on + num_in = 0; + } + + // We ideally want the backlog to be about 50% full. + // This gives some headroom both ways to prevent underflow and overflow. + // We tweak current_ratio to encourage this. + constexpr double tweak_time_scale = 0.05; // seconds + const double tweak_correction = (backlog_fullness - 0.5) * (time_delta / tweak_time_scale); + current_ratio *= std::pow(1.0 + 2.0 * tweak_correction, tweak_correction < 0 ? 3.0 : 1.0); + + // This low-pass filter smoothes out variance in the calculated stretch ratio. + // The time-scale determines how responsive this filter is. + constexpr double lpf_time_scale = 2.0; // seconds + const double lpf_gain = 1.0 - std::exp(-time_delta / lpf_time_scale); + m_stretch_ratio += lpf_gain * (current_ratio - m_stretch_ratio); + + // Place a lower limit of 5% speed. When a game boots up, there will be + // many silence samples. These do not need to be timestretched. + m_stretch_ratio = std::max(m_stretch_ratio, 0.05); + m_sound_touch.setTempo(m_stretch_ratio); + + LOG_DEBUG(Audio, "{:5}/{:5} ratio:{:0.6f} backlog:{:0.6f}", num_in, num_out, m_stretch_ratio, + backlog_fullness); + + m_sound_touch.putSamples(in, static_cast<u32>(num_in)); + return m_sound_touch.receiveSamples(out, static_cast<u32>(num_out)); +} + +} // namespace AudioCore diff --git a/src/audio_core/time_stretch.h b/src/audio_core/time_stretch.h new file mode 100644 index 000000000..c2286fba1 --- /dev/null +++ b/src/audio_core/time_stretch.h @@ -0,0 +1,36 @@ +// Copyright 2018 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <array> +#include <cstddef> +#include <SoundTouch.h> +#include "common/common_types.h" + +namespace AudioCore { + +class TimeStretcher { +public: + TimeStretcher(u32 sample_rate, u32 channel_count); + + /// @param in Input sample buffer + /// @param num_in Number of input frames in `in` + /// @param out Output sample buffer + /// @param num_out Desired number of output frames in `out` + /// @returns Actual number of frames written to `out` + std::size_t Process(const s16* in, std::size_t num_in, s16* out, std::size_t num_out); + + void Clear(); + + void Flush(); + +private: + u32 m_sample_rate; + u32 m_channel_count; + soundtouch::SoundTouch m_sound_touch; + double m_stretch_ratio = 1.0; +}; + +} // namespace AudioCore |