DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (31ec81b5d7bb)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
/*
 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */


/*!\file
 * \brief Describes the vpx image descriptor and associated operations
 *
 */
#ifdef __cplusplus
extern "C" {
#endif

#ifndef VPX_IMAGE_H
#define VPX_IMAGE_H

  /*!\brief Current ABI version number
   *
   * \internal
   * If this file is altered in any way that changes the ABI, this value
   * must be bumped.  Examples include, but are not limited to, changing
   * types, removing or reassigning enums, adding/removing/rearranging
   * fields to structures
   */
#define VPX_IMAGE_ABI_VERSION (1) /**<\hideinitializer*/


#define VPX_IMG_FMT_PLANAR     0x100  /**< Image is a planar format */
#define VPX_IMG_FMT_UV_FLIP    0x200  /**< V plane precedes U plane in memory */
#define VPX_IMG_FMT_HAS_ALPHA  0x400  /**< Image has an alpha channel component */


  /*!\brief List of supported image formats */
  typedef enum vpx_img_fmt {
    VPX_IMG_FMT_NONE,
    VPX_IMG_FMT_RGB24,   /**< 24 bit per pixel packed RGB */
    VPX_IMG_FMT_RGB32,   /**< 32 bit per pixel packed 0RGB */
    VPX_IMG_FMT_RGB565,  /**< 16 bit per pixel, 565 */
    VPX_IMG_FMT_RGB555,  /**< 16 bit per pixel, 555 */
    VPX_IMG_FMT_UYVY,    /**< UYVY packed YUV */
    VPX_IMG_FMT_YUY2,    /**< YUYV packed YUV */
    VPX_IMG_FMT_YVYU,    /**< YVYU packed YUV */
    VPX_IMG_FMT_BGR24,   /**< 24 bit per pixel packed BGR */
    VPX_IMG_FMT_RGB32_LE, /**< 32 bit packed BGR0 */
    VPX_IMG_FMT_ARGB,     /**< 32 bit packed ARGB, alpha=255 */
    VPX_IMG_FMT_ARGB_LE,  /**< 32 bit packed BGRA, alpha=255 */
    VPX_IMG_FMT_RGB565_LE,  /**< 16 bit per pixel, gggbbbbb rrrrrggg */
    VPX_IMG_FMT_RGB555_LE,  /**< 16 bit per pixel, gggbbbbb 0rrrrrgg */
    VPX_IMG_FMT_YV12    = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, /**< planar YVU */
    VPX_IMG_FMT_I420    = VPX_IMG_FMT_PLANAR | 2,
    VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, /** < planar 4:2:0 format with vpx color space */
    VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4,
    VPX_IMG_FMT_I422    = VPX_IMG_FMT_PLANAR | 5,
    VPX_IMG_FMT_I444    = VPX_IMG_FMT_PLANAR | 6,
    VPX_IMG_FMT_444A    = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_HAS_ALPHA | 7
  } vpx_img_fmt_t; /**< alias for enum vpx_img_fmt */

#if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
#define IMG_FMT_PLANAR         VPX_IMG_FMT_PLANAR     /**< \deprecated Use #VPX_IMG_FMT_PLANAR */
#define IMG_FMT_UV_FLIP        VPX_IMG_FMT_UV_FLIP    /**< \deprecated Use #VPX_IMG_FMT_UV_FLIP */
#define IMG_FMT_HAS_ALPHA      VPX_IMG_FMT_HAS_ALPHA  /**< \deprecated Use #VPX_IMG_FMT_HAS_ALPHA */

  /*!\brief Deprecated list of supported image formats
   * \deprecated New code should use #vpx_img_fmt
   */
#define img_fmt   vpx_img_fmt
  /*!\brief alias for enum img_fmt.
   * \deprecated New code should use #vpx_img_fmt_t
   */
#define img_fmt_t vpx_img_fmt_t

#define IMG_FMT_NONE       VPX_IMG_FMT_NONE       /**< \deprecated Use #VPX_IMG_FMT_NONE */
#define IMG_FMT_RGB24      VPX_IMG_FMT_RGB24      /**< \deprecated Use #VPX_IMG_FMT_RGB24 */
#define IMG_FMT_RGB32      VPX_IMG_FMT_RGB32      /**< \deprecated Use #VPX_IMG_FMT_RGB32 */
#define IMG_FMT_RGB565     VPX_IMG_FMT_RGB565     /**< \deprecated Use #VPX_IMG_FMT_RGB565 */
#define IMG_FMT_RGB555     VPX_IMG_FMT_RGB555     /**< \deprecated Use #VPX_IMG_FMT_RGB555 */
#define IMG_FMT_UYVY       VPX_IMG_FMT_UYVY       /**< \deprecated Use #VPX_IMG_FMT_UYVY */
#define IMG_FMT_YUY2       VPX_IMG_FMT_YUY2       /**< \deprecated Use #VPX_IMG_FMT_YUY2 */
#define IMG_FMT_YVYU       VPX_IMG_FMT_YVYU       /**< \deprecated Use #VPX_IMG_FMT_YVYU */
#define IMG_FMT_BGR24      VPX_IMG_FMT_BGR24      /**< \deprecated Use #VPX_IMG_FMT_BGR24 */
#define IMG_FMT_RGB32_LE   VPX_IMG_FMT_RGB32_LE   /**< \deprecated Use #VPX_IMG_FMT_RGB32_LE */
#define IMG_FMT_ARGB       VPX_IMG_FMT_ARGB       /**< \deprecated Use #VPX_IMG_FMT_ARGB */
#define IMG_FMT_ARGB_LE    VPX_IMG_FMT_ARGB_LE    /**< \deprecated Use #VPX_IMG_FMT_ARGB_LE */
#define IMG_FMT_RGB565_LE  VPX_IMG_FMT_RGB565_LE  /**< \deprecated Use #VPX_IMG_FMT_RGB565_LE */
#define IMG_FMT_RGB555_LE  VPX_IMG_FMT_RGB555_LE  /**< \deprecated Use #VPX_IMG_FMT_RGB555_LE */
#define IMG_FMT_YV12       VPX_IMG_FMT_YV12       /**< \deprecated Use #VPX_IMG_FMT_YV12 */
#define IMG_FMT_I420       VPX_IMG_FMT_I420       /**< \deprecated Use #VPX_IMG_FMT_I420 */
#define IMG_FMT_VPXYV12    VPX_IMG_FMT_VPXYV12    /**< \deprecated Use #VPX_IMG_FMT_VPXYV12 */
#define IMG_FMT_VPXI420    VPX_IMG_FMT_VPXI420    /**< \deprecated Use #VPX_IMG_FMT_VPXI420 */
#endif /* VPX_CODEC_DISABLE_COMPAT */

  /**\brief Image Descriptor */
  typedef struct vpx_image {
    vpx_img_fmt_t fmt; /**< Image Format */

    /* Image storage dimensions */
    unsigned int  w;   /**< Stored image width */
    unsigned int  h;   /**< Stored image height */

    /* Image display dimensions */
    unsigned int  d_w;   /**< Displayed image width */
    unsigned int  d_h;   /**< Displayed image height */

    /* Chroma subsampling info */
    unsigned int  x_chroma_shift;   /**< subsampling order, X */
    unsigned int  y_chroma_shift;   /**< subsampling order, Y */

    /* Image data pointers. */
#define VPX_PLANE_PACKED 0   /**< To be used for all packed formats */
#define VPX_PLANE_Y      0   /**< Y (Luminance) plane */
#define VPX_PLANE_U      1   /**< U (Chroma) plane */
#define VPX_PLANE_V      2   /**< V (Chroma) plane */
#define VPX_PLANE_ALPHA  3   /**< A (Transparency) plane */
#if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
#define PLANE_PACKED     VPX_PLANE_PACKED
#define PLANE_Y          VPX_PLANE_Y
#define PLANE_U          VPX_PLANE_U
#define PLANE_V          VPX_PLANE_V
#define PLANE_ALPHA      VPX_PLANE_ALPHA
#endif
    unsigned char *planes[4];  /**< pointer to the top left pixel for each plane */
    int      stride[4];  /**< stride between rows for each plane */

    int     bps; /**< bits per sample (for packed formats) */

    /* The following member may be set by the application to associate data
     * with this image.
     */
    void    *user_priv; /**< may be set by the application to associate data
                         *   with this image. */

    /* The following members should be treated as private. */
    unsigned char *img_data;       /**< private */
    int      img_data_owner; /**< private */
    int      self_allocd;    /**< private */
  } vpx_image_t; /**< alias for struct vpx_image */

  /**\brief Representation of a rectangle on a surface */
  typedef struct vpx_image_rect {
    unsigned int x; /**< leftmost column */
    unsigned int y; /**< topmost row */
    unsigned int w; /**< width */
    unsigned int h; /**< height */
  } vpx_image_rect_t; /**< alias for struct vpx_image_rect */

  /*!\brief Open a descriptor, allocating storage for the underlying image
   *
   * Returns a descriptor for storing an image of the given format. The
   * storage for the descriptor is allocated on the heap.
   *
   * \param[in]    img       Pointer to storage for descriptor. If this parameter
   *                         is NULL, the storage for the descriptor will be
   *                         allocated on the heap.
   * \param[in]    fmt       Format for the image
   * \param[in]    d_w       Width of the image
   * \param[in]    d_h       Height of the image
   * \param[in]    align     Alignment, in bytes, of the image buffer and
   *                         each row in the image(stride).
   *
   * \return Returns a pointer to the initialized image descriptor. If the img
   *         parameter is non-null, the value of the img parameter will be
   *         returned.
   */
  vpx_image_t *vpx_img_alloc(vpx_image_t  *img,
                             vpx_img_fmt_t fmt,
                             unsigned int d_w,
                             unsigned int d_h,
                             unsigned int align);

  /*!\brief Open a descriptor, using existing storage for the underlying image
   *
   * Returns a descriptor for storing an image of the given format. The
   * storage for descriptor has been allocated elsewhere, and a descriptor is
   * desired to "wrap" that storage.
   *
   * \param[in]    img       Pointer to storage for descriptor. If this parameter
   *                         is NULL, the storage for the descriptor will be
   *                         allocated on the heap.
   * \param[in]    fmt       Format for the image
   * \param[in]    d_w       Width of the image
   * \param[in]    d_h       Height of the image
   * \param[in]    align     Alignment, in bytes, of each row in the image.
   * \param[in]    img_data  Storage to use for the image
   *
   * \return Returns a pointer to the initialized image descriptor. If the img
   *         parameter is non-null, the value of the img parameter will be
   *         returned.
   */
  vpx_image_t *vpx_img_wrap(vpx_image_t  *img,
                            vpx_img_fmt_t fmt,
                            unsigned int d_w,
                            unsigned int d_h,
                            unsigned int align,
                            unsigned char      *img_data);


  /*!\brief Set the rectangle identifying the displayed portion of the image
   *
   * Updates the displayed rectangle (aka viewport) on the image surface to
   * match the specified coordinates and size.
   *
   * \param[in]    img       Image descriptor
   * \param[in]    x         leftmost column
   * \param[in]    y         topmost row
   * \param[in]    w         width
   * \param[in]    h         height
   *
   * \return 0 if the requested rectangle is valid, nonzero otherwise.
   */
  int vpx_img_set_rect(vpx_image_t  *img,
                       unsigned int  x,
                       unsigned int  y,
                       unsigned int  w,
                       unsigned int  h);


  /*!\brief Flip the image vertically (top for bottom)
   *
   * Adjusts the image descriptor's pointers and strides to make the image
   * be referenced upside-down.
   *
   * \param[in]    img       Image descriptor
   */
  void vpx_img_flip(vpx_image_t *img);

  /*!\brief Close an image descriptor
   *
   * Frees all allocated storage associated with an image descriptor.
   *
   * \param[in]    img       Image descriptor
   */
  void vpx_img_free(vpx_image_t *img);

#endif
#ifdef __cplusplus
}
#endif