text: // Copyright 2015 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEBUG_WRITER_H_
  #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEBUG_WRITER_H_
  
  #include <stdint.h>
  
  #include <memory>
  
  #include "base/files/file.h"
  #include "base/macros.h"
  #include "base/memory/ref_counted.h"
  #include "base/memory/weak_ptr.h"
  #include "content/common/content_export.h"
  #include "media/audio/audio_input_writer.h"
  #include "media/base/audio_parameters.h"
  
  namespace media {
  
  class AudioBus;
  class AudioBusRefCounted;
  
  }  // namespace media
  
  namespace content {
  
  // Writes audio input data used for debugging purposes. Can be created on any
  // thread. Must be destroyed on the FILE thread. Write call can be made on any
  // thread. This object must be unregistered in Write caller before destroyed.
  // When created, it takes ownership of |file|.
  class CONTENT_EXPORT AudioInputDebugWriter
      : public NON_EXPORTED_BASE(media::AudioInputWriter) {
   public:
    AudioInputDebugWriter(base::File file, const media::AudioParameters& params);
  
    ~AudioInputDebugWriter() override;
  
    // Write data from |data| to file.
    void Write(std::unique_ptr<media::AudioBus> data) override;
  
   private:
    // Write data from |data| to file. Called on the FILE thread.
    void DoWrite(std::unique_ptr<media::AudioBus> data);
  
    // Write wave header to file. Called on the FILE thread twice: on construction
    // of AudioInputDebugWriter size of the wave data is unknown, so the header is
    // written with zero sizes; then on destruction it is re-written with the
    // actual size info accumulated throughout the object lifetime.
    void WriteHeader();
  
    // The file to write to.
    base::File file_;
  
    // Number of written samples.
    uint64_t samples_;
  
    // Input audio parameters required to build wave header.
    media::AudioParameters params_;
  
    // Intermediate buffer to be written to file. Interleaved 16 bit audio data.
    std::unique_ptr<int16_t[]> interleaved_data_;
    int interleaved_data_size_;
  
    base::WeakPtrFactory<AudioInputDebugWriter> weak_factory_;
  };
  
  }  // namspace content
  
  #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_AUDIO_INPUT_DEBUG_WRITER_H_
  