Move classses VideoCaptureDeviceClient and VideoCaptureBufferPool to media/capture/video

content/browser/renderer_host/media/video_capture_device_client.h

-// 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_VIDEO_CAPTURE_DEVICE_CLIENT_H_
-#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_CLIENT_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <memory>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/weak_ptr.h"
-#include "content/common/content_export.h"
-#include "media/capture/video/video_capture_device.h"
-
-namespace content {
-class VideoCaptureBufferPool;
-class VideoFrameReceiver;
-class VideoCaptureJpegDecoder;
-
-using VideoCaptureJpegDecoderFactoryCB =
-    base::Callback<std::unique_ptr<VideoCaptureJpegDecoder>()>;
-
-// Implementation of media::VideoCaptureDevice::Client that uses a buffer pool
-// to provide buffers and converts incoming data to the I420 format for
-// consumption by a given VideoFrameReceiver.
-//
-// Methods of this class may be called from any thread, and in practice will
-// often be called on some auxiliary thread depending on the platform and the
-// device type; including, for example, the DirectShow thread on Windows, the
-// v4l2_thread on Linux, and the UI thread for tab capture.
-// The owner is responsible for making sure that the instance outlives these
-// calls.
-//
-// It has an internal ref counted TextureWrapHelper class used to wrap incoming
-// GpuMemoryBuffers into Texture backed VideoFrames. This class creates and
-// manages the necessary entities to interact with the GPU process, notably an
-// offscreen Context to avoid janking the UI thread.
-class CONTENT_EXPORT VideoCaptureDeviceClient
-    : public media::VideoCaptureDevice::Client,
-      public base::SupportsWeakPtr<VideoCaptureDeviceClient> {
- public:
-  VideoCaptureDeviceClient(
-      std::unique_ptr<VideoFrameReceiver> receiver,
-      const scoped_refptr<VideoCaptureBufferPool>& buffer_pool,
-      const VideoCaptureJpegDecoderFactoryCB& jpeg_decoder_factory);
-  ~VideoCaptureDeviceClient() override;
-
-  // VideoCaptureDevice::Client implementation.
-  void OnIncomingCapturedData(const uint8_t* data,
-                              int length,
-                              const media::VideoCaptureFormat& frame_format,
-                              int rotation,
-                              base::TimeTicks reference_time,
-                              base::TimeDelta timestamp) override;
-  std::unique_ptr<Buffer> ReserveOutputBuffer(
-      const gfx::Size& dimensions,
-      media::VideoPixelFormat format,
-      media::VideoPixelStorage storage) override;
-  void OnIncomingCapturedBuffer(std::unique_ptr<Buffer> buffer,
-                                const media::VideoCaptureFormat& frame_format,
-                                base::TimeTicks reference_time,
-                                base::TimeDelta timestamp) override;
-  void OnIncomingCapturedVideoFrame(
-      std::unique_ptr<Buffer> buffer,
-      const scoped_refptr<media::VideoFrame>& frame) override;
-  std::unique_ptr<Buffer> ResurrectLastOutputBuffer(
-      const gfx::Size& dimensions,
-      media::VideoPixelFormat format,
-      media::VideoPixelStorage storage) override;
-  void OnError(const tracked_objects::Location& from_here,
-               const std::string& reason) override;
-  void OnLog(const std::string& message) override;
-  double GetBufferPoolUtilization() const override;
-
- private:
-  // Reserve output buffer into which I420 contents can be copied directly.
-  // The dimensions of the frame is described by |dimensions|, and requested
-  // output buffer format is specified by |storage|. The reserved output buffer
-  // is returned; and the pointer to Y plane is stored at [y_plane_data], U
-  // plane is stored at [u_plane_data], V plane is stored at [v_plane_data].
-  // Returns an nullptr if allocation fails.
-  //
-  // When requested |storage| is PIXEL_STORAGE_CPU, a single shared memory
-  // chunk is reserved; whereas for PIXEL_STORAGE_GPUMEMORYBUFFER, three
-  // GpuMemoryBuffers in R_8 format representing I420 planes are reserved. The
-  // output buffers stay reserved and mapped for use until the Buffer objects
-  // are destroyed or returned.
-  std::unique_ptr<Buffer> ReserveI420OutputBuffer(
-      const gfx::Size& dimensions,
-      media::VideoPixelStorage storage,
-      uint8_t** y_plane_data,
-      uint8_t** u_plane_data,
-      uint8_t** v_plane_data);
-
-  // The receiver to which we post events.
-  const std::unique_ptr<VideoFrameReceiver> receiver_;
-
-  const VideoCaptureJpegDecoderFactoryCB jpeg_decoder_factory_callback_;
-  std::unique_ptr<VideoCaptureJpegDecoder> external_jpeg_decoder_;
-
-  // Whether |external_jpeg_decoder_| has been initialized.
-  bool external_jpeg_decoder_initialized_;
-
-  // The pool of shared-memory buffers used for capturing.
-  const scoped_refptr<VideoCaptureBufferPool> buffer_pool_;
-
-#if DCHECK_IS_ON()
-  // Counter used to track the number of times consecutive capture buffers are
-  // dropped.
-  int dropped_frame_counter_ = 0;
-
-  static const int kMaxDroppedFrames = 150;
-#endif  // DCHECK_IS_ON()
-
-  // Indication to the Client to copy-transform the incoming data into
-  // GpuMemoryBuffers.
-  const bool use_gpu_memory_buffers_;
-
-  media::VideoPixelFormat last_captured_pixel_format_;
-
-  DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceClient);
-};
-
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_CLIENT_H_