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// Copyright 2022 The Chromium Authors
// 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_MEDIA_STREAM_AUDIO_SOURCE_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_MEDIA_STREAM_AUDIO_SOURCE_HANDLER_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "base/synchronization/lock.h"
#include "third_party/blink/renderer/modules/webaudio/audio_node.h"
#include "third_party/blink/renderer/platform/audio/audio_source_provider.h"
namespace blink {
class AudioNode;
class MediaStreamAudioSourceHandler final : public AudioHandler {
public:
static scoped_refptr<MediaStreamAudioSourceHandler> Create(
AudioNode&,
std::unique_ptr<AudioSourceProvider>);
~MediaStreamAudioSourceHandler() override;
// AudioHandler
void Process(uint32_t frames_to_process) override;
void SetFormat(uint32_t number_of_channels, float sample_rate);
double TailTime() const override { return 0; }
double LatencyTime() const override { return 0; }
bool RequiresTailProcessing() const final { return false; }
private:
MediaStreamAudioSourceHandler(AudioNode&,
std::unique_ptr<AudioSourceProvider>);
// AudioHandler: MediaStreamAudioSourceNode never propagates silence.
bool PropagatesSilence() const override { return false; }
// https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/media/capture/README.md#logs
void SendLogMessage(const char* const function_name, const String& message);
std::unique_ptr<AudioSourceProvider> audio_source_provider_;
base::Lock process_lock_;
unsigned source_number_of_channels_ GUARDED_BY(process_lock_) = 0;
// Used to trigger one single textlog indicating that processing started as
// intended. Set to true once in the first call to the Process callback.
bool is_processing_ = false;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_MEDIA_STREAM_AUDIO_SOURCE_HANDLER_H_
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