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29 #include "modules/webaudio/AnalyserNode.h"
31 #include "bindings/core/v8/ExceptionMessages.h"
32 #include "bindings/core/v8/ExceptionState.h"
33 #include "core/dom/ExceptionCode.h"
34 #include "modules/webaudio/AudioNodeInput.h"
35 #include "modules/webaudio/AudioNodeOutput.h"
39 AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate)
40 : AudioBasicInspectorNode(context, sampleRate, 2)
42 setNodeType(NodeTypeAnalyser);
46 AnalyserNode::~AnalyserNode()
48 ASSERT(!isInitialized());
51 void AnalyserNode::dispose()
54 AudioBasicInspectorNode::dispose();
57 void AnalyserNode::process(size_t framesToProcess)
59 AudioBus* outputBus = output(0)->bus();
61 if (!isInitialized() || !input(0)->isConnected()) {
66 AudioBus* inputBus = input(0)->bus();
68 // Give the analyser the audio which is passing through this AudioNode.
69 m_analyser.writeInput(inputBus, framesToProcess);
71 // 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
72 // (resulting in inputBus == outputBus). Otherwise, do an up-mix to stereo.
73 if (inputBus != outputBus)
74 outputBus->copyFrom(*inputBus);
77 void AnalyserNode::setFftSize(unsigned size, ExceptionState& exceptionState)
79 if (!m_analyser.setFftSize(size)) {
80 exceptionState.throwDOMException(
82 (size < RealtimeAnalyser::MinFFTSize || size > RealtimeAnalyser::MaxFFTSize) ?
83 ExceptionMessages::indexOutsideRange("FFT size", size, RealtimeAnalyser::MinFFTSize, ExceptionMessages::InclusiveBound, RealtimeAnalyser::MaxFFTSize, ExceptionMessages::InclusiveBound)
84 : ("The value provided (" + String::number(size) + ") is not a power of two."));
88 void AnalyserNode::setMinDecibels(double k, ExceptionState& exceptionState)
90 if (k < maxDecibels()) {
91 m_analyser.setMinDecibels(k);
93 exceptionState.throwDOMException(
95 ExceptionMessages::indexExceedsMaximumBound("minDecibels", k, maxDecibels()));
99 void AnalyserNode::setMaxDecibels(double k, ExceptionState& exceptionState)
101 if (k > minDecibels()) {
102 m_analyser.setMaxDecibels(k);
104 exceptionState.throwDOMException(
106 ExceptionMessages::indexExceedsMinimumBound("maxDecibels", k, minDecibels()));
110 void AnalyserNode::setSmoothingTimeConstant(double k, ExceptionState& exceptionState)
112 if (k >= 0 && k <= 1) {
113 m_analyser.setSmoothingTimeConstant(k);
115 exceptionState.throwDOMException(
117 ExceptionMessages::indexOutsideRange("smoothing value", k, 0.0, ExceptionMessages::InclusiveBound, 1.0, ExceptionMessages::InclusiveBound));
123 #endif // ENABLE(WEB_AUDIO)