Add PIXEL_FORMAT_MT21.

media/base/video_types.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 MEDIA_BASE_VIDEO_TYPES_H_
 #define MEDIA_BASE_VIDEO_TYPES_H_
 
 #include <string>
 
 #include "build/build_config.h"
@@ skipping 19 matching lines @@
       7,  // 12bpp with Y plane followed by a 2x2 interleaved VU plane.
   PIXEL_FORMAT_UYVY =
       8,  // 16bpp interleaved 2x1 U, 1x1 Y, 2x1 V, 1x1 Y samples.
   PIXEL_FORMAT_YUY2 =
       9,  // 16bpp interleaved 1x1 Y, 2x1 U, 1x1 Y, 2x1 V samples.
   PIXEL_FORMAT_ARGB = 10,   // 32bpp ARGB, 1 plane.
   PIXEL_FORMAT_XRGB = 11,   // 24bpp XRGB, 1 plane.
   PIXEL_FORMAT_RGB24 = 12,  // 24bpp BGR, 1 plane.
   PIXEL_FORMAT_RGB32 = 13,  // 32bpp BGRA, 1 plane.
   PIXEL_FORMAT_MJPEG = 14,  // MJPEG compressed.
+  // MediaTek proprietary format. MT21 is similar to NV21 except the memory
+  // layout and pixel layout (swizzles). 12bpp with Y plane followed by a 2x2
+  // interleaved VU plane. Each image contains two buffers -- Y plane and VU
+  // plane. Two planes can be non-contiguous in memory. The starting addresses
+  // of Y plane and VU plane are 4KB alignment.
+  // Suppose image dimension is (width, height). For both Y plane and VU plane:
+  // Row pitch = ((width+15)/16) * 16.
+  // Plane size = Row pitch * (((height+31)/32)*32)
+  PIXEL_FORMAT_MT21 = 15,
   // Please update UMA histogram enumeration when adding new formats here.
   PIXEL_FORMAT_MAX =
-      PIXEL_FORMAT_MJPEG,  // Must always be equal to largest entry logged.
+      PIXEL_FORMAT_MT21,    // Must always be equal to largest entry logged.
 };
 
 // Color space or color range used for the pixels.
 // Logged to UMA, so never reuse values. Leave gaps if necessary.
 enum ColorSpace {
   COLOR_SPACE_UNSPECIFIED = 0,  // In general this is Rec601.
   // The JPEG color space is the combination of Rec.601 and full range colors
   // (aka pc range colors).
   COLOR_SPACE_JPEG = 1,
   COLOR_SPACE_HD_REC709 = 2,  // Rec709 "HD" color space.
   COLOR_SPACE_SD_REC601 = 3,  // Rec601 "SD" color space.
   COLOR_SPACE_MAX = COLOR_SPACE_SD_REC601,
 };
 
 // Returns the name of a Format as a string.
 MEDIA_EXPORT std::string VideoPixelFormatToString(VideoPixelFormat format);
 
 // Returns true if |format| is a YUV format with multiple planes.
 MEDIA_EXPORT bool IsYuvPlanar(VideoPixelFormat format);
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_TYPES_H_