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authorMerryMage <MerryMage@users.noreply.github.com>2016-04-27 08:22:39 +0200
committerMerryMage <MerryMage@users.noreply.github.com>2016-05-19 08:24:39 +0200
commit6542c606023164d5c9c028bb2a2409d91b3ecb9e (patch)
treed7405466a62e1e5e60c8f89c92f85c6346d0a395 /src/audio_core/hle/mixers.cpp
parentAudioCore: Implement time stretcher (#1737) (diff)
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Diffstat (limited to 'src/audio_core/hle/mixers.cpp')
-rw-r--r--src/audio_core/hle/mixers.cpp201
1 files changed, 201 insertions, 0 deletions
diff --git a/src/audio_core/hle/mixers.cpp b/src/audio_core/hle/mixers.cpp
new file mode 100644
index 000000000..18335f7f0
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+++ 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 <cstddef>
+
+#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<QuadFrame32, 3>& 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<size_t>(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<s16>(MathUtil::Clamp(value, -32768, 32767));
+}
+
+static std::array<s16, 2> AddAndClampToS16(const std::array<s16, 2>& a, const std::array<s16, 2>& b) {
+ return {
+ ClampToS16(static_cast<s32>(a[0]) + static_cast<s32>(b[0])),
+ ClampToS16(static_cast<s32>(a[1]) + static_cast<s32>(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<s16, 2>& accumulator, const std::array<s32, 4>& sample) -> std::array<s16, 2> {
+ // Downmix to mono
+ s16 mono = ClampToS16(static_cast<s32>((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<s16, 2>& accumulator, const std::array<s32, 4>& sample) -> std::array<s16, 2> {
+ // Downmix to stereo
+ s16 left = ClampToS16(static_cast<s32>(gain * sample[0] + gain * sample[2]));
+ s16 right = ClampToS16(static_cast<s32>(gain * sample[1] + gain * sample[3]));
+ // Mix into current frame
+ return AddAndClampToS16(accumulator, { left, right });
+ });
+ return;
+ }
+
+ UNREACHABLE_MSG("Invalid output_format %zu", static_cast<size_t>(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<QuadFrame32, 3>& 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