gfx/ycbcr/yuv_convert.h

   1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_BASE_YUV_CONVERT_H_
   6 #define MEDIA_BASE_YUV_CONVERT_H_
   7
   8 #include "chromium_types.h"
   9 #include "gfxCore.h"
  10
  11 namespace mozilla {
  12
  13 namespace gfx {
  14
  15 // Type of YUV surface.
  16 // The value of these enums matter as they are used to shift vertical indices.
  17 enum YUVType {
  18   YV12 = 0,           // YV12 is half width and half height chroma channels.
  19   YV16 = 1,           // YV16 is half width and full height chroma channels.
  20   YV24 = 2            // YV24 is full width and full height chroma channels.
  21 };
  22
  23 // Mirror means flip the image horizontally, as in looking in a mirror.
  24 // Rotate happens after mirroring.
  25 enum Rotate {
  26   ROTATE_0,           // Rotation off.
  27   ROTATE_90,          // Rotate clockwise.
  28   ROTATE_180,         // Rotate upside down.
  29   ROTATE_270,         // Rotate counter clockwise.
  30   MIRROR_ROTATE_0,    // Mirror horizontally.
  31   MIRROR_ROTATE_90,   // Mirror then Rotate clockwise.
  32   MIRROR_ROTATE_180,  // Mirror vertically.
  33   MIRROR_ROTATE_270   // Transpose.
  34 };
  35
  36 // Filter affects how scaling looks.
  37 enum ScaleFilter {
  38   FILTER_NONE = 0,        // No filter (point sampled).
  39   FILTER_BILINEAR_H = 1,  // Bilinear horizontal filter.
  40   FILTER_BILINEAR_V = 2,  // Bilinear vertical filter.
  41   FILTER_BILINEAR = 3     // Bilinear filter.
  42 };
  43
  44 NS_GFX_(YUVType) TypeFromSize(int ywidth, int yheight, int cbcrwidth, int cbcrheight);
  45
  46 // Convert a frame of YUV to 32 bit ARGB.
  47 // Pass in YV16/YV12 depending on source format
  48 NS_GFX_(void) ConvertYCbCrToRGB32(const uint8* yplane,
  49                                   const uint8* uplane,
  50                                   const uint8* vplane,
  51                                   uint8* rgbframe,
  52                                   int pic_x,
  53                                   int pic_y,
  54                                   int pic_width,
  55                                   int pic_height,
  56                                   int ystride,
  57                                   int uvstride,
  58                                   int rgbstride,
  59                                   YUVType yuv_type);
  60
  61 // Scale a frame of YUV to 32 bit ARGB.
  62 // Supports rotation and mirroring.
  63 NS_GFX_(void) ScaleYCbCrToRGB32(const uint8* yplane,
  64                                 const uint8* uplane,
  65                                 const uint8* vplane,
  66                                 uint8* rgbframe,
  67                                 int source_width,
  68                                 int source_height,
  69                                 int width,
  70                                 int height,
  71                                 int ystride,
  72                                 int uvstride,
  73                                 int rgbstride,
  74                                 YUVType yuv_type,
  75                                 Rotate view_rotate,
  76                                 ScaleFilter filter);
  77
  78 }  // namespace gfx
  79 }  // namespace mozilla
  80
  81 #endif  // MEDIA_BASE_YUV_CONVERT_H_