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// Copyright 2022 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webaudio/dynamics_compressor_handler.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_dynamics_compressor_options.h"
#include "third_party/blink/renderer/modules/webaudio/audio_graph_tracer.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node_input.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node_output.h"
#include "third_party/blink/renderer/platform/audio/audio_utilities.h"
#include "third_party/blink/renderer/platform/audio/dynamics_compressor.h"
#include "third_party/blink/renderer/platform/bindings/exception_messages.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
namespace blink {
namespace {
// Set output to stereo by default.
constexpr unsigned kDefaultNumberOfOutputChannels = 2;
} // namespace
DynamicsCompressorHandler::DynamicsCompressorHandler(
AudioNode& node,
float sample_rate,
AudioParamHandler& threshold,
AudioParamHandler& knee,
AudioParamHandler& ratio,
AudioParamHandler& attack,
AudioParamHandler& release)
: AudioHandler(kNodeTypeDynamicsCompressor, node, sample_rate),
threshold_(&threshold),
knee_(&knee),
ratio_(&ratio),
reduction_(0),
attack_(&attack),
release_(&release) {
AddInput();
AddOutput(kDefaultNumberOfOutputChannels);
SetInternalChannelCountMode(kClampedMax);
Initialize();
}
scoped_refptr<DynamicsCompressorHandler> DynamicsCompressorHandler::Create(
AudioNode& node,
float sample_rate,
AudioParamHandler& threshold,
AudioParamHandler& knee,
AudioParamHandler& ratio,
AudioParamHandler& attack,
AudioParamHandler& release) {
return base::AdoptRef(new DynamicsCompressorHandler(
node, sample_rate, threshold, knee, ratio, attack, release));
}
DynamicsCompressorHandler::~DynamicsCompressorHandler() {
Uninitialize();
}
void DynamicsCompressorHandler::Process(uint32_t frames_to_process) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("webaudio.audionode"),
"DynamicsCompressorHandler::Process");
AudioBus* output_bus = Output(0).Bus();
DCHECK(output_bus);
dynamics_compressor_->SetParameterValue(DynamicsCompressor::kParamThreshold,
threshold_->FinalValue());
dynamics_compressor_->SetParameterValue(DynamicsCompressor::kParamKnee,
knee_->FinalValue());
dynamics_compressor_->SetParameterValue(DynamicsCompressor::kParamRatio,
ratio_->FinalValue());
dynamics_compressor_->SetParameterValue(DynamicsCompressor::kParamAttack,
attack_->FinalValue());
dynamics_compressor_->SetParameterValue(DynamicsCompressor::kParamRelease,
release_->FinalValue());
scoped_refptr<AudioBus> input_bus = Input(0).Bus();
dynamics_compressor_->Process(input_bus.get(), output_bus, frames_to_process);
reduction_.store(
dynamics_compressor_->ParameterValue(DynamicsCompressor::kParamReduction),
std::memory_order_relaxed);
}
void DynamicsCompressorHandler::ProcessOnlyAudioParams(
uint32_t frames_to_process) {
DCHECK(Context()->IsAudioThread());
DCHECK_LE(frames_to_process, GetDeferredTaskHandler().RenderQuantumFrames());
std::vector<float> values(GetDeferredTaskHandler().RenderQuantumFrames());
threshold_->CalculateSampleAccurateValues(values.data(), frames_to_process);
knee_->CalculateSampleAccurateValues(values.data(), frames_to_process);
ratio_->CalculateSampleAccurateValues(values.data(), frames_to_process);
attack_->CalculateSampleAccurateValues(values.data(), frames_to_process);
release_->CalculateSampleAccurateValues(values.data(), frames_to_process);
}
void DynamicsCompressorHandler::Initialize() {
if (IsInitialized()) {
return;
}
AudioHandler::Initialize();
dynamics_compressor_ = std::make_unique<DynamicsCompressor>(
Context()->sampleRate(), kDefaultNumberOfOutputChannels);
}
bool DynamicsCompressorHandler::RequiresTailProcessing() const {
// Always return true even if the tail time and latency might both be zero.
return true;
}
double DynamicsCompressorHandler::TailTime() const {
return dynamics_compressor_->TailTime();
}
double DynamicsCompressorHandler::LatencyTime() const {
return dynamics_compressor_->LatencyTime();
}
void DynamicsCompressorHandler::SetChannelCount(
unsigned channel_count,
ExceptionState& exception_state) {
DCHECK(IsMainThread());
BaseAudioContext::GraphAutoLocker locker(Context());
// A DynamicsCompressorNode only supports 1 or 2 channels
if (channel_count > 0 && channel_count <= 2) {
if (channel_count_ != channel_count) {
channel_count_ = channel_count;
if (InternalChannelCountMode() != kMax) {
UpdateChannelsForInputs();
}
}
} else {
exception_state.ThrowDOMException(
DOMExceptionCode::kNotSupportedError,
ExceptionMessages::IndexOutsideRange<uint32_t>(
"channelCount", channel_count, 1,
ExceptionMessages::kInclusiveBound, 2,
ExceptionMessages::kInclusiveBound));
}
}
void DynamicsCompressorHandler::SetChannelCountMode(
const String& mode,
ExceptionState& exception_state) {
DCHECK(IsMainThread());
BaseAudioContext::GraphAutoLocker locker(Context());
ChannelCountMode old_mode = InternalChannelCountMode();
if (mode == "clamped-max") {
new_channel_count_mode_ = kClampedMax;
} else if (mode == "explicit") {
new_channel_count_mode_ = kExplicit;
} else if (mode == "max") {
// This is not supported for a DynamicsCompressorNode, which can
// only handle 1 or 2 channels.
exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
"The provided value 'max' is not an "
"allowed value for ChannelCountMode");
new_channel_count_mode_ = old_mode;
} else {
// Do nothing for other invalid values.
new_channel_count_mode_ = old_mode;
}
if (new_channel_count_mode_ != old_mode) {
Context()->GetDeferredTaskHandler().AddChangedChannelCountMode(this);
}
}
} // namespace blink
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