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Side by Side Diff: third_party/WebKit/Source/modules/webaudio/AudioNode.cpp

Issue 2501863003: Support for AudioContextOptions latencyHint. (Closed)
Patch Set: Fixes to WebAudioDeviceImpl unit test. Created 3 years, 10 months ago
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1 /* 1 /*
2 * Copyright (C) 2010, Google Inc. All rights reserved. 2 * Copyright (C) 2010, Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 1. Redistributions of source code must retain the above copyright 7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer. 8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright 9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the 10 * notice, this list of conditions and the following disclaimer in the
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38 #include <stdio.h> 38 #include <stdio.h>
39 #endif 39 #endif
40 40
41 namespace blink { 41 namespace blink {
42 42
43 AudioHandler::AudioHandler(NodeType nodeType, AudioNode& node, float sampleRate) 43 AudioHandler::AudioHandler(NodeType nodeType, AudioNode& node, float sampleRate)
44 : m_isInitialized(false), 44 : m_isInitialized(false),
45 m_nodeType(NodeTypeUnknown), 45 m_nodeType(NodeTypeUnknown),
46 m_node(&node), 46 m_node(&node),
47 m_context(node.context()), 47 m_context(node.context()),
48 m_sampleRate(sampleRate),
49 m_lastProcessingTime(-1), 48 m_lastProcessingTime(-1),
50 m_lastNonSilentTime(-1), 49 m_lastNonSilentTime(-1),
51 m_connectionRefCount(0), 50 m_connectionRefCount(0),
52 m_isDisabled(false), 51 m_isDisabled(false),
53 m_channelCount(2) { 52 m_channelCount(2) {
54 setNodeType(nodeType); 53 setNodeType(nodeType);
55 setInternalChannelCountMode(Max); 54 setInternalChannelCountMode(Max);
56 setInternalChannelInterpretation(AudioBus::Speakers); 55 setInternalChannelInterpretation(AudioBus::Speakers);
57 56
58 #if DEBUG_AUDIONODE_REFERENCES 57 #if DEBUG_AUDIONODE_REFERENCES
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316 // have the results cached in their bus; 315 // have the results cached in their bus;
317 double currentTime = context()->currentTime(); 316 double currentTime = context()->currentTime();
318 if (m_lastProcessingTime != currentTime) { 317 if (m_lastProcessingTime != currentTime) {
319 // important to first update this time because of feedback loops in the 318 // important to first update this time because of feedback loops in the
320 // rendering graph. 319 // rendering graph.
321 m_lastProcessingTime = currentTime; 320 m_lastProcessingTime = currentTime;
322 321
323 pullInputs(framesToProcess); 322 pullInputs(framesToProcess);
324 323
325 bool silentInputs = inputsAreSilent(); 324 bool silentInputs = inputsAreSilent();
326 if (!silentInputs) 325 if (!silentInputs) {
327 m_lastNonSilentTime = 326 m_lastNonSilentTime =
328 (context()->currentSampleFrame() + framesToProcess) / 327 (context()->currentSampleFrame() + framesToProcess) /
329 static_cast<double>(m_sampleRate); 328 static_cast<double>(context()->sampleRate());
329 }
330 330
331 if (silentInputs && propagatesSilence()) { 331 if (silentInputs && propagatesSilence()) {
332 silenceOutputs(); 332 silenceOutputs();
333 // AudioParams still need to be processed so that the value can be updated 333 // AudioParams still need to be processed so that the value can be updated
334 // if there are automations or so that the upstream nodes get pulled if 334 // if there are automations or so that the upstream nodes get pulled if
335 // any are connected to the AudioParam. 335 // any are connected to the AudioParam.
336 processOnlyAudioParams(framesToProcess); 336 processOnlyAudioParams(framesToProcess);
337 } else { 337 } else {
338 // Unsilence the outputs first because the processing of the node may 338 // Unsilence the outputs first because the processing of the node may
339 // cause the outputs to go silent and we want to propagate that hint to 339 // cause the outputs to go silent and we want to propagate that hint to
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952 } 952 }
953 953
954 void AudioNode::didAddOutput(unsigned numberOfOutputs) { 954 void AudioNode::didAddOutput(unsigned numberOfOutputs) {
955 m_connectedNodes.push_back(nullptr); 955 m_connectedNodes.push_back(nullptr);
956 DCHECK_EQ(numberOfOutputs, m_connectedNodes.size()); 956 DCHECK_EQ(numberOfOutputs, m_connectedNodes.size());
957 m_connectedParams.push_back(nullptr); 957 m_connectedParams.push_back(nullptr);
958 DCHECK_EQ(numberOfOutputs, m_connectedParams.size()); 958 DCHECK_EQ(numberOfOutputs, m_connectedParams.size());
959 } 959 }
960 960
961 } // namespace blink 961 } // namespace blink
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