dom/media/systemservices/VideoFrameUtils.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set sw=2 ts=8 et ft=cpp : */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_VideoFrameUtil_h
   8 #define mozilla_VideoFrameUtil_h
   9
  10 #include "mozilla/camera/PCameras.h"
  11
  12 namespace webrtc {
  13 class VideoFrame;
  14 }
  15
  16 namespace mozilla {
  17 class ShmemBuffer;
  18
  19 // Util methods for working with webrtc::VideoFrame(s) and
  20 // the IPC classes that are used to deliver their contents to the
  21 // MediaEnginge
  22
  23 class VideoFrameUtils {
  24  public:
  25   // Returns the total number of bytes necessary to copy a VideoFrame's buffer
  26   // across all planes.
  27   static uint32_t TotalRequiredBufferSize(const webrtc::VideoFrame& frame);
  28
  29   // Initializes a camera::VideoFrameProperties from a VideoFrameBuffer
  30   static void InitFrameBufferProperties(
  31       const webrtc::VideoFrame& aVideoFrame,
  32       camera::VideoFrameProperties& aDestProperties);
  33
  34   // Copies the buffers out of a VideoFrameBuffer into a buffer.
  35   // Attempts to make as few memcopies as possible.
  36   static void CopyVideoFrameBuffers(uint8_t* aDestBuffer,
  37                                     const size_t aDestBufferSize,
  38                                     const webrtc::VideoFrame& aVideoFrame);
  39
  40   // Copies the buffers in a VideoFrameBuffer into a Shmem
  41   // returns the eno from the underlying memcpy.
  42   static void CopyVideoFrameBuffers(ShmemBuffer& aDestShmem,
  43                                     const webrtc::VideoFrame& aVideoFrame);
  44 };
  45
  46 } /* namespace mozilla */
  47
  48 #endif