third_party/WebKit/Source/platform/mediastream/MediaStreamWebAudioSource.cpp

/*
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#include "platform/audio/AudioBus.h"
#include "platform/mediastream/MediaStreamWebAudioSource.h"
#include "public/platform/WebAudioSourceProvider.h"
#include <memory>

namespace blink {

MediaStreamWebAudioSource::MediaStreamWebAudioSource(
    std::unique_ptr<WebAudioSourceProvider> provider)
    : web_audio_source_provider_(std::move(provider)) {}

MediaStreamWebAudioSource::~MediaStreamWebAudioSource() {}

void MediaStreamWebAudioSource::ProvideInput(AudioBus* bus,
                                             size_t frames_to_process) {
  DCHECK(bus);
  if (!bus)
    return;

  if (!web_audio_source_provider_) {
    bus->Zero();
    return;
  }

  // Wrap the AudioBus channel data using WebVector.
  size_t n = bus->NumberOfChannels();
  WebVector<float*> web_audio_data(n);
  for (size_t i = 0; i < n; ++i)
    web_audio_data[i] = bus->Channel(i)->MutableData();

  web_audio_source_provider_->ProvideInput(web_audio_data, frames_to_process);
}

}  // namespace blink