| /* |
| * Copyright (C) 2010, Google Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| #include "third_party/blink/renderer/modules/webaudio/analyser_node.h" |
| |
| #include "third_party/blink/renderer/modules/webaudio/analyser_options.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/bindings/exception_messages.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_state.h" |
| |
| namespace blink { |
| |
| AnalyserHandler::AnalyserHandler(AudioNode& node, float sample_rate) |
| : AudioBasicInspectorHandler(kNodeTypeAnalyser, node, sample_rate, 1) { |
| channel_count_ = 2; |
| Initialize(); |
| } |
| |
| scoped_refptr<AnalyserHandler> AnalyserHandler::Create(AudioNode& node, |
| float sample_rate) { |
| return base::AdoptRef(new AnalyserHandler(node, sample_rate)); |
| } |
| |
| AnalyserHandler::~AnalyserHandler() { |
| Uninitialize(); |
| } |
| |
| void AnalyserHandler::Process(uint32_t frames_to_process) { |
| AudioBus* output_bus = Output(0).Bus(); |
| |
| if (!IsInitialized()) { |
| output_bus->Zero(); |
| return; |
| } |
| |
| AudioBus* input_bus = Input(0).Bus(); |
| |
| // Give the analyser the audio which is passing through this |
| // AudioNode. This must always be done so that the state of the |
| // Analyser reflects the current input. |
| analyser_.WriteInput(input_bus, frames_to_process); |
| |
| if (!Input(0).IsConnected()) { |
| // No inputs, so clear the output, and propagate the silence hint. |
| output_bus->Zero(); |
| return; |
| } |
| |
| // For in-place processing, our override of pullInputs() will just pass the |
| // audio data through unchanged if the channel count matches from input to |
| // output (resulting in inputBus == outputBus). Otherwise, do an up-mix to |
| // stereo. |
| if (input_bus != output_bus) |
| output_bus->CopyFrom(*input_bus); |
| } |
| |
| void AnalyserHandler::SetFftSize(unsigned size, |
| ExceptionState& exception_state) { |
| if (!analyser_.SetFftSize(size)) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| (size < RealtimeAnalyser::kMinFFTSize || |
| size > RealtimeAnalyser::kMaxFFTSize) |
| ? ExceptionMessages::IndexOutsideRange( |
| "FFT size", size, RealtimeAnalyser::kMinFFTSize, |
| ExceptionMessages::kInclusiveBound, |
| RealtimeAnalyser::kMaxFFTSize, |
| ExceptionMessages::kInclusiveBound) |
| : ("The value provided (" + String::Number(size) + |
| ") is not a power of two.")); |
| } |
| } |
| |
| void AnalyserHandler::SetMinDecibels(double k, |
| ExceptionState& exception_state) { |
| if (k < MaxDecibels()) { |
| analyser_.SetMinDecibels(k); |
| } else { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMaximumBound("minDecibels", k, |
| MaxDecibels())); |
| } |
| } |
| |
| void AnalyserHandler::SetMaxDecibels(double k, |
| ExceptionState& exception_state) { |
| if (k > MinDecibels()) { |
| analyser_.SetMaxDecibels(k); |
| } else { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexExceedsMinimumBound("maxDecibels", k, |
| MinDecibels())); |
| } |
| } |
| |
| void AnalyserHandler::SetMinMaxDecibels(double min_decibels, |
| double max_decibels, |
| ExceptionState& exception_state) { |
| if (min_decibels >= max_decibels) { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| "maxDecibels (" + String::Number(max_decibels) + |
| ") must be greater than or equal to minDecibels " + "( " + |
| String::Number(min_decibels) + ")."); |
| return; |
| } |
| analyser_.SetMinDecibels(min_decibels); |
| analyser_.SetMaxDecibels(max_decibels); |
| } |
| |
| void AnalyserHandler::SetSmoothingTimeConstant( |
| double k, |
| ExceptionState& exception_state) { |
| if (k >= 0 && k <= 1) { |
| analyser_.SetSmoothingTimeConstant(k); |
| } else { |
| exception_state.ThrowDOMException( |
| DOMExceptionCode::kIndexSizeError, |
| ExceptionMessages::IndexOutsideRange( |
| "smoothing value", k, 0.0, ExceptionMessages::kInclusiveBound, 1.0, |
| ExceptionMessages::kInclusiveBound)); |
| } |
| } |
| |
| void AnalyserHandler::UpdatePullStatusIfNeeded() { |
| Context()->AssertGraphOwner(); |
| |
| if (Output(0).IsConnected()) { |
| // When an AudioBasicInspectorNode is connected to a downstream node, it |
| // will get pulled by the downstream node, thus remove it from the context's |
| // automatic pull list. |
| if (need_automatic_pull_) { |
| Context()->GetDeferredTaskHandler().RemoveAutomaticPullNode(this); |
| need_automatic_pull_ = false; |
| } |
| } else { |
| unsigned number_of_input_connections = |
| Input(0).NumberOfRenderingConnections(); |
| // When an AnalyserNode is not connected to any downstream node |
| // while still connected from upstream node(s), add it to the context's |
| // automatic pull list. |
| // |
| // But don't remove the AnalyserNode if there are no inputs |
| // connected to the node. The node needs to be pulled so that the |
| // internal state is updated with the correct input signal (of |
| // zeroes). |
| if (number_of_input_connections && !need_automatic_pull_) { |
| Context()->GetDeferredTaskHandler().AddAutomaticPullNode(this); |
| need_automatic_pull_ = true; |
| } |
| } |
| } |
| |
| bool AnalyserHandler::RequiresTailProcessing() const { |
| // Tail time is always non-zero so tail processing is required. |
| return true; |
| } |
| |
| double AnalyserHandler::TailTime() const { |
| return RealtimeAnalyser::kMaxFFTSize / |
| static_cast<double>(Context()->sampleRate()); |
| }; |
| // ---------------------------------------------------------------- |
| |
| AnalyserNode::AnalyserNode(BaseAudioContext& context) |
| : AudioBasicInspectorNode(context) { |
| SetHandler(AnalyserHandler::Create(*this, context.sampleRate())); |
| } |
| |
| AnalyserNode* AnalyserNode::Create(BaseAudioContext& context, |
| ExceptionState& exception_state) { |
| DCHECK(IsMainThread()); |
| |
| if (context.IsContextClosed()) { |
| context.ThrowExceptionForClosedState(exception_state); |
| return nullptr; |
| } |
| |
| return MakeGarbageCollected<AnalyserNode>(context); |
| } |
| |
| AnalyserNode* AnalyserNode::Create(BaseAudioContext* context, |
| const AnalyserOptions* options, |
| ExceptionState& exception_state) { |
| DCHECK(IsMainThread()); |
| |
| AnalyserNode* node = Create(*context, exception_state); |
| |
| if (!node) |
| return nullptr; |
| |
| node->HandleChannelOptions(options, exception_state); |
| |
| node->setFftSize(options->fftSize(), exception_state); |
| node->setSmoothingTimeConstant(options->smoothingTimeConstant(), |
| exception_state); |
| |
| // minDecibels and maxDecibels have default values. Set both of the values |
| // at once. |
| node->SetMinMaxDecibels(options->minDecibels(), options->maxDecibels(), |
| exception_state); |
| |
| return node; |
| } |
| |
| AnalyserHandler& AnalyserNode::GetAnalyserHandler() const { |
| return static_cast<AnalyserHandler&>(Handler()); |
| } |
| |
| unsigned AnalyserNode::fftSize() const { |
| return GetAnalyserHandler().FftSize(); |
| } |
| |
| void AnalyserNode::setFftSize(unsigned size, ExceptionState& exception_state) { |
| return GetAnalyserHandler().SetFftSize(size, exception_state); |
| } |
| |
| unsigned AnalyserNode::frequencyBinCount() const { |
| return GetAnalyserHandler().FrequencyBinCount(); |
| } |
| |
| void AnalyserNode::setMinDecibels(double min, ExceptionState& exception_state) { |
| GetAnalyserHandler().SetMinDecibels(min, exception_state); |
| } |
| |
| double AnalyserNode::minDecibels() const { |
| return GetAnalyserHandler().MinDecibels(); |
| } |
| |
| void AnalyserNode::setMaxDecibels(double max, ExceptionState& exception_state) { |
| GetAnalyserHandler().SetMaxDecibels(max, exception_state); |
| } |
| |
| void AnalyserNode::SetMinMaxDecibels(double min, |
| double max, |
| ExceptionState& exception_state) { |
| GetAnalyserHandler().SetMinMaxDecibels(min, max, exception_state); |
| } |
| |
| double AnalyserNode::maxDecibels() const { |
| return GetAnalyserHandler().MaxDecibels(); |
| } |
| |
| void AnalyserNode::setSmoothingTimeConstant(double smoothing_time, |
| ExceptionState& exception_state) { |
| GetAnalyserHandler().SetSmoothingTimeConstant(smoothing_time, |
| exception_state); |
| } |
| |
| double AnalyserNode::smoothingTimeConstant() const { |
| return GetAnalyserHandler().SmoothingTimeConstant(); |
| } |
| |
| void AnalyserNode::getFloatFrequencyData(NotShared<DOMFloat32Array> array) { |
| GetAnalyserHandler().GetFloatFrequencyData(array.View(), |
| context()->currentTime()); |
| } |
| |
| void AnalyserNode::getByteFrequencyData(NotShared<DOMUint8Array> array) { |
| GetAnalyserHandler().GetByteFrequencyData(array.View(), |
| context()->currentTime()); |
| } |
| |
| void AnalyserNode::getFloatTimeDomainData(NotShared<DOMFloat32Array> array) { |
| GetAnalyserHandler().GetFloatTimeDomainData(array.View()); |
| } |
| |
| void AnalyserNode::getByteTimeDomainData(NotShared<DOMUint8Array> array) { |
| GetAnalyserHandler().GetByteTimeDomainData(array.View()); |
| } |
| |
| } // namespace blink |
