| // Copyright 2014 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_STEREO_PANNER_NODE_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_STEREO_PANNER_NODE_H_ |
| |
| #include <memory> |
| #include "base/gtest_prod_util.h" |
| #include "third_party/blink/renderer/modules/webaudio/audio_node.h" |
| #include "third_party/blink/renderer/modules/webaudio/audio_param.h" |
| #include "third_party/blink/renderer/platform/audio/audio_bus.h" |
| #include "third_party/blink/renderer/platform/audio/stereo_panner.h" |
| |
| namespace blink { |
| |
| class BaseAudioContext; |
| class StereoPannerOptions; |
| |
| // StereoPannerNode is an AudioNode with one input and one output. It is |
| // specifically designed for equal-power stereo panning. |
| class StereoPannerHandler final : public AudioHandler { |
| public: |
| static scoped_refptr<StereoPannerHandler> Create(AudioNode&, |
| float sample_rate, |
| AudioParamHandler& pan); |
| ~StereoPannerHandler() override; |
| |
| void Process(uint32_t frames_to_process) override; |
| void ProcessOnlyAudioParams(uint32_t frames_to_process) override; |
| void Initialize() override; |
| |
| void SetChannelCount(unsigned, ExceptionState&) final; |
| void SetChannelCountMode(const String&, ExceptionState&) final; |
| |
| double TailTime() const override { return 0; } |
| double LatencyTime() const override { return 0; } |
| bool RequiresTailProcessing() const final { return false; } |
| |
| private: |
| StereoPannerHandler(AudioNode&, float sample_rate, AudioParamHandler& pan); |
| |
| std::unique_ptr<StereoPanner> stereo_panner_; |
| scoped_refptr<AudioParamHandler> pan_; |
| |
| AudioFloatArray sample_accurate_pan_values_; |
| |
| FRIEND_TEST_ALL_PREFIXES(StereoPannerNodeTest, StereoPannerLifetime); |
| }; |
| |
| class StereoPannerNode final : public AudioNode { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| static StereoPannerNode* Create(BaseAudioContext&, ExceptionState&); |
| static StereoPannerNode* Create(BaseAudioContext*, |
| const StereoPannerOptions*, |
| ExceptionState&); |
| |
| StereoPannerNode(BaseAudioContext&); |
| |
| void Trace(blink::Visitor*) override; |
| |
| AudioParam* pan() const; |
| |
| private: |
| Member<AudioParam> pan_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_STEREO_PANNER_NODE_H_ |