From 6542c606023164d5c9c028bb2a2409d91b3ecb9e Mon Sep 17 00:00:00 2001 From: MerryMage Date: Wed, 27 Apr 2016 07:22:39 +0100 Subject: DSP/HLE: Implement mixer processing --- src/audio_core/hle/mixers.cpp | 201 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 src/audio_core/hle/mixers.cpp (limited to 'src/audio_core/hle/mixers.cpp') diff --git a/src/audio_core/hle/mixers.cpp b/src/audio_core/hle/mixers.cpp new file mode 100644 index 000000000..18335f7f0 --- /dev/null +++ b/src/audio_core/hle/mixers.cpp @@ -0,0 +1,201 @@ +// Copyright 2016 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include + +#include "audio_core/hle/common.h" +#include "audio_core/hle/dsp.h" +#include "audio_core/hle/mixers.h" + +#include "common/assert.h" +#include "common/logging/log.h" +#include "common/math_util.h" + +namespace DSP { +namespace HLE { + +void Mixers::Reset() { + current_frame.fill({}); + state = {}; +} + +DspStatus Mixers::Tick(DspConfiguration& config, + const IntermediateMixSamples& read_samples, + IntermediateMixSamples& write_samples, + const std::array& input) +{ + ParseConfig(config); + + AuxReturn(read_samples); + AuxSend(write_samples, input); + + MixCurrentFrame(); + + return GetCurrentStatus(); +} + +void Mixers::ParseConfig(DspConfiguration& config) { + if (!config.dirty_raw) { + return; + } + + if (config.mixer1_enabled_dirty) { + config.mixer1_enabled_dirty.Assign(0); + state.mixer1_enabled = config.mixer1_enabled != 0; + LOG_TRACE(Audio_DSP, "mixers mixer1_enabled = %hu", config.mixer1_enabled); + } + + if (config.mixer2_enabled_dirty) { + config.mixer2_enabled_dirty.Assign(0); + state.mixer2_enabled = config.mixer2_enabled != 0; + LOG_TRACE(Audio_DSP, "mixers mixer2_enabled = %hu", config.mixer2_enabled); + } + + if (config.volume_0_dirty) { + config.volume_0_dirty.Assign(0); + state.intermediate_mixer_volume[0] = config.volume[0]; + LOG_TRACE(Audio_DSP, "mixers volume[0] = %f", config.volume[0]); + } + + if (config.volume_1_dirty) { + config.volume_1_dirty.Assign(0); + state.intermediate_mixer_volume[1] = config.volume[1]; + LOG_TRACE(Audio_DSP, "mixers volume[1] = %f", config.volume[1]); + } + + if (config.volume_2_dirty) { + config.volume_2_dirty.Assign(0); + state.intermediate_mixer_volume[2] = config.volume[2]; + LOG_TRACE(Audio_DSP, "mixers volume[2] = %f", config.volume[2]); + } + + if (config.output_format_dirty) { + config.output_format_dirty.Assign(0); + state.output_format = config.output_format; + LOG_TRACE(Audio_DSP, "mixers output_format = %zu", static_cast(config.output_format)); + } + + if (config.headphones_connected_dirty) { + config.headphones_connected_dirty.Assign(0); + // Do nothing. + // (Note: Whether headphones are connected does affect coefficients used for surround sound.) + LOG_TRACE(Audio_DSP, "mixers headphones_connected=%hu", config.headphones_connected); + } + + if (config.dirty_raw) { + LOG_DEBUG(Audio_DSP, "mixers remaining_dirty=%x", config.dirty_raw); + } + + config.dirty_raw = 0; +} + +static s16 ClampToS16(s32 value) { + return static_cast(MathUtil::Clamp(value, -32768, 32767)); +} + +static std::array AddAndClampToS16(const std::array& a, const std::array& b) { + return { + ClampToS16(static_cast(a[0]) + static_cast(b[0])), + ClampToS16(static_cast(a[1]) + static_cast(b[1])) + }; +} + +void Mixers::DownmixAndMixIntoCurrentFrame(float gain, const QuadFrame32& samples) { + // TODO(merry): Limiter. (Currently we're performing final mixing assuming a disabled limiter.) + + switch (state.output_format) { + case OutputFormat::Mono: + std::transform(current_frame.begin(), current_frame.end(), samples.begin(), current_frame.begin(), + [gain](const std::array& accumulator, const std::array& sample) -> std::array { + // Downmix to mono + s16 mono = ClampToS16(static_cast((gain * sample[0] + gain * sample[1] + gain * sample[2] + gain * sample[3]) / 2)); + // Mix into current frame + return AddAndClampToS16(accumulator, { mono, mono }); + }); + return; + + case OutputFormat::Surround: + // TODO(merry): Implement surround sound. + // fallthrough + + case OutputFormat::Stereo: + std::transform(current_frame.begin(), current_frame.end(), samples.begin(), current_frame.begin(), + [gain](const std::array& accumulator, const std::array& sample) -> std::array { + // Downmix to stereo + s16 left = ClampToS16(static_cast(gain * sample[0] + gain * sample[2])); + s16 right = ClampToS16(static_cast(gain * sample[1] + gain * sample[3])); + // Mix into current frame + return AddAndClampToS16(accumulator, { left, right }); + }); + return; + } + + UNREACHABLE_MSG("Invalid output_format %zu", static_cast(state.output_format)); +} + +void Mixers::AuxReturn(const IntermediateMixSamples& read_samples) { + // NOTE: read_samples.mix{1,2}.pcm32 annoyingly have their dimensions in reverse order to QuadFrame32. + + if (state.mixer1_enabled) { + for (size_t sample = 0; sample < samples_per_frame; sample++) { + for (size_t channel = 0; channel < 4; channel++) { + state.intermediate_mix_buffer[1][sample][channel] = read_samples.mix1.pcm32[channel][sample]; + } + } + } + + if (state.mixer2_enabled) { + for (size_t sample = 0; sample < samples_per_frame; sample++) { + for (size_t channel = 0; channel < 4; channel++) { + state.intermediate_mix_buffer[2][sample][channel] = read_samples.mix2.pcm32[channel][sample]; + } + } + } +} + +void Mixers::AuxSend(IntermediateMixSamples& write_samples, const std::array& input) { + // NOTE: read_samples.mix{1,2}.pcm32 annoyingly have their dimensions in reverse order to QuadFrame32. + + state.intermediate_mix_buffer[0] = input[0]; + + if (state.mixer1_enabled) { + for (size_t sample = 0; sample < samples_per_frame; sample++) { + for (size_t channel = 0; channel < 4; channel++) { + write_samples.mix1.pcm32[channel][sample] = input[1][sample][channel]; + } + } + } else { + state.intermediate_mix_buffer[1] = input[1]; + } + + if (state.mixer2_enabled) { + for (size_t sample = 0; sample < samples_per_frame; sample++) { + for (size_t channel = 0; channel < 4; channel++) { + write_samples.mix2.pcm32[channel][sample] = input[2][sample][channel]; + } + } + } else { + state.intermediate_mix_buffer[2] = input[2]; + } +} + +void Mixers::MixCurrentFrame() { + current_frame.fill({}); + + for (size_t mix = 0; mix < 3; mix++) { + DownmixAndMixIntoCurrentFrame(state.intermediate_mixer_volume[mix], state.intermediate_mix_buffer[mix]); + } + + // TODO(merry): Compressor. (We currently assume a disabled compressor.) +} + +DspStatus Mixers::GetCurrentStatus() const { + DspStatus status; + status.unknown = 0; + status.dropped_frames = 0; + return status; +} + +} // namespace HLE +} // namespace DSP -- cgit v1.2.3