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media/libvpx/vpx/vpx_image.h@ac0c01689b40 (annotated)

media/libvpx/vpx/vpx_image.h

Thu, 15 Jan 2015 15:59:08 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 15 Jan 2015 15:59:08 +0100
branch
TOR_BUG_9701
changeset 10
ac0c01689b40
permissions
-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0 1 /*
michael@0 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0 3 *
michael@0 4 * Use of this source code is governed by a BSD-style license
michael@0 5 * that can be found in the LICENSE file in the root of the source
michael@0 6 * tree. An additional intellectual property rights grant can be found
michael@0 7 * in the file PATENTS. All contributing project authors may
michael@0 8 * be found in the AUTHORS file in the root of the source tree.
michael@0 9 */
michael@0 10
michael@0 11
michael@0 12 /*!\file
michael@0 13 * \brief Describes the vpx image descriptor and associated operations
michael@0 14 *
michael@0 15 */
michael@0 16 #ifdef __cplusplus
michael@0 17 extern "C" {
michael@0 18 #endif
michael@0 19
michael@0 20 #ifndef VPX_IMAGE_H
michael@0 21 #define VPX_IMAGE_H
michael@0 22
michael@0 23 /*!\brief Current ABI version number
michael@0 24 *
michael@0 25 * \internal
michael@0 26 * If this file is altered in any way that changes the ABI, this value
michael@0 27 * must be bumped. Examples include, but are not limited to, changing
michael@0 28 * types, removing or reassigning enums, adding/removing/rearranging
michael@0 29 * fields to structures
michael@0 30 */
michael@0 31 #define VPX_IMAGE_ABI_VERSION (1) /**<\hideinitializer*/
michael@0 32
michael@0 33
michael@0 34 #define VPX_IMG_FMT_PLANAR 0x100 /**< Image is a planar format */
michael@0 35 #define VPX_IMG_FMT_UV_FLIP 0x200 /**< V plane precedes U plane in memory */
michael@0 36 #define VPX_IMG_FMT_HAS_ALPHA 0x400 /**< Image has an alpha channel component */
michael@0 37
michael@0 38
michael@0 39 /*!\brief List of supported image formats */
michael@0 40 typedef enum vpx_img_fmt {
michael@0 41 VPX_IMG_FMT_NONE,
michael@0 42 VPX_IMG_FMT_RGB24, /**< 24 bit per pixel packed RGB */
michael@0 43 VPX_IMG_FMT_RGB32, /**< 32 bit per pixel packed 0RGB */
michael@0 44 VPX_IMG_FMT_RGB565, /**< 16 bit per pixel, 565 */
michael@0 45 VPX_IMG_FMT_RGB555, /**< 16 bit per pixel, 555 */
michael@0 46 VPX_IMG_FMT_UYVY, /**< UYVY packed YUV */
michael@0 47 VPX_IMG_FMT_YUY2, /**< YUYV packed YUV */
michael@0 48 VPX_IMG_FMT_YVYU, /**< YVYU packed YUV */
michael@0 49 VPX_IMG_FMT_BGR24, /**< 24 bit per pixel packed BGR */
michael@0 50 VPX_IMG_FMT_RGB32_LE, /**< 32 bit packed BGR0 */
michael@0 51 VPX_IMG_FMT_ARGB, /**< 32 bit packed ARGB, alpha=255 */
michael@0 52 VPX_IMG_FMT_ARGB_LE, /**< 32 bit packed BGRA, alpha=255 */
michael@0 53 VPX_IMG_FMT_RGB565_LE, /**< 16 bit per pixel, gggbbbbb rrrrrggg */
michael@0 54 VPX_IMG_FMT_RGB555_LE, /**< 16 bit per pixel, gggbbbbb 0rrrrrgg */
michael@0 55 VPX_IMG_FMT_YV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, /**< planar YVU */
michael@0 56 VPX_IMG_FMT_I420 = VPX_IMG_FMT_PLANAR | 2,
michael@0 57 VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, /** < planar 4:2:0 format with vpx color space */
michael@0 58 VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4,
michael@0 59 VPX_IMG_FMT_I422 = VPX_IMG_FMT_PLANAR | 5,
michael@0 60 VPX_IMG_FMT_I444 = VPX_IMG_FMT_PLANAR | 6,
michael@0 61 VPX_IMG_FMT_444A = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_HAS_ALPHA | 7
michael@0 62 } vpx_img_fmt_t; /**< alias for enum vpx_img_fmt */
michael@0 63
michael@0 64 #if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
michael@0 65 #define IMG_FMT_PLANAR VPX_IMG_FMT_PLANAR /**< \deprecated Use #VPX_IMG_FMT_PLANAR */
michael@0 66 #define IMG_FMT_UV_FLIP VPX_IMG_FMT_UV_FLIP /**< \deprecated Use #VPX_IMG_FMT_UV_FLIP */
michael@0 67 #define IMG_FMT_HAS_ALPHA VPX_IMG_FMT_HAS_ALPHA /**< \deprecated Use #VPX_IMG_FMT_HAS_ALPHA */
michael@0 68
michael@0 69 /*!\brief Deprecated list of supported image formats
michael@0 70 * \deprecated New code should use #vpx_img_fmt
michael@0 71 */
michael@0 72 #define img_fmt vpx_img_fmt
michael@0 73 /*!\brief alias for enum img_fmt.
michael@0 74 * \deprecated New code should use #vpx_img_fmt_t
michael@0 75 */
michael@0 76 #define img_fmt_t vpx_img_fmt_t
michael@0 77
michael@0 78 #define IMG_FMT_NONE VPX_IMG_FMT_NONE /**< \deprecated Use #VPX_IMG_FMT_NONE */
michael@0 79 #define IMG_FMT_RGB24 VPX_IMG_FMT_RGB24 /**< \deprecated Use #VPX_IMG_FMT_RGB24 */
michael@0 80 #define IMG_FMT_RGB32 VPX_IMG_FMT_RGB32 /**< \deprecated Use #VPX_IMG_FMT_RGB32 */
michael@0 81 #define IMG_FMT_RGB565 VPX_IMG_FMT_RGB565 /**< \deprecated Use #VPX_IMG_FMT_RGB565 */
michael@0 82 #define IMG_FMT_RGB555 VPX_IMG_FMT_RGB555 /**< \deprecated Use #VPX_IMG_FMT_RGB555 */
michael@0 83 #define IMG_FMT_UYVY VPX_IMG_FMT_UYVY /**< \deprecated Use #VPX_IMG_FMT_UYVY */
michael@0 84 #define IMG_FMT_YUY2 VPX_IMG_FMT_YUY2 /**< \deprecated Use #VPX_IMG_FMT_YUY2 */
michael@0 85 #define IMG_FMT_YVYU VPX_IMG_FMT_YVYU /**< \deprecated Use #VPX_IMG_FMT_YVYU */
michael@0 86 #define IMG_FMT_BGR24 VPX_IMG_FMT_BGR24 /**< \deprecated Use #VPX_IMG_FMT_BGR24 */
michael@0 87 #define IMG_FMT_RGB32_LE VPX_IMG_FMT_RGB32_LE /**< \deprecated Use #VPX_IMG_FMT_RGB32_LE */
michael@0 88 #define IMG_FMT_ARGB VPX_IMG_FMT_ARGB /**< \deprecated Use #VPX_IMG_FMT_ARGB */
michael@0 89 #define IMG_FMT_ARGB_LE VPX_IMG_FMT_ARGB_LE /**< \deprecated Use #VPX_IMG_FMT_ARGB_LE */
michael@0 90 #define IMG_FMT_RGB565_LE VPX_IMG_FMT_RGB565_LE /**< \deprecated Use #VPX_IMG_FMT_RGB565_LE */
michael@0 91 #define IMG_FMT_RGB555_LE VPX_IMG_FMT_RGB555_LE /**< \deprecated Use #VPX_IMG_FMT_RGB555_LE */
michael@0 92 #define IMG_FMT_YV12 VPX_IMG_FMT_YV12 /**< \deprecated Use #VPX_IMG_FMT_YV12 */
michael@0 93 #define IMG_FMT_I420 VPX_IMG_FMT_I420 /**< \deprecated Use #VPX_IMG_FMT_I420 */
michael@0 94 #define IMG_FMT_VPXYV12 VPX_IMG_FMT_VPXYV12 /**< \deprecated Use #VPX_IMG_FMT_VPXYV12 */
michael@0 95 #define IMG_FMT_VPXI420 VPX_IMG_FMT_VPXI420 /**< \deprecated Use #VPX_IMG_FMT_VPXI420 */
michael@0 96 #endif /* VPX_CODEC_DISABLE_COMPAT */
michael@0 97
michael@0 98 /**\brief Image Descriptor */
michael@0 99 typedef struct vpx_image {
michael@0 100 vpx_img_fmt_t fmt; /**< Image Format */
michael@0 101
michael@0 102 /* Image storage dimensions */
michael@0 103 unsigned int w; /**< Stored image width */
michael@0 104 unsigned int h; /**< Stored image height */
michael@0 105
michael@0 106 /* Image display dimensions */
michael@0 107 unsigned int d_w; /**< Displayed image width */
michael@0 108 unsigned int d_h; /**< Displayed image height */
michael@0 109
michael@0 110 /* Chroma subsampling info */
michael@0 111 unsigned int x_chroma_shift; /**< subsampling order, X */
michael@0 112 unsigned int y_chroma_shift; /**< subsampling order, Y */
michael@0 113
michael@0 114 /* Image data pointers. */
michael@0 115 #define VPX_PLANE_PACKED 0 /**< To be used for all packed formats */
michael@0 116 #define VPX_PLANE_Y 0 /**< Y (Luminance) plane */
michael@0 117 #define VPX_PLANE_U 1 /**< U (Chroma) plane */
michael@0 118 #define VPX_PLANE_V 2 /**< V (Chroma) plane */
michael@0 119 #define VPX_PLANE_ALPHA 3 /**< A (Transparency) plane */
michael@0 120 #if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
michael@0 121 #define PLANE_PACKED VPX_PLANE_PACKED
michael@0 122 #define PLANE_Y VPX_PLANE_Y
michael@0 123 #define PLANE_U VPX_PLANE_U
michael@0 124 #define PLANE_V VPX_PLANE_V
michael@0 125 #define PLANE_ALPHA VPX_PLANE_ALPHA
michael@0 126 #endif
michael@0 127 unsigned char *planes[4]; /**< pointer to the top left pixel for each plane */
michael@0 128 int stride[4]; /**< stride between rows for each plane */
michael@0 129
michael@0 130 int bps; /**< bits per sample (for packed formats) */
michael@0 131
michael@0 132 /* The following member may be set by the application to associate data
michael@0 133 * with this image.
michael@0 134 */
michael@0 135 void *user_priv; /**< may be set by the application to associate data
michael@0 136 * with this image. */
michael@0 137
michael@0 138 /* The following members should be treated as private. */
michael@0 139 unsigned char *img_data; /**< private */
michael@0 140 int img_data_owner; /**< private */
michael@0 141 int self_allocd; /**< private */
michael@0 142 } vpx_image_t; /**< alias for struct vpx_image */
michael@0 143
michael@0 144 /**\brief Representation of a rectangle on a surface */
michael@0 145 typedef struct vpx_image_rect {
michael@0 146 unsigned int x; /**< leftmost column */
michael@0 147 unsigned int y; /**< topmost row */
michael@0 148 unsigned int w; /**< width */
michael@0 149 unsigned int h; /**< height */
michael@0 150 } vpx_image_rect_t; /**< alias for struct vpx_image_rect */
michael@0 151
michael@0 152 /*!\brief Open a descriptor, allocating storage for the underlying image
michael@0 153 *
michael@0 154 * Returns a descriptor for storing an image of the given format. The
michael@0 155 * storage for the descriptor is allocated on the heap.
michael@0 156 *
michael@0 157 * \param[in] img Pointer to storage for descriptor. If this parameter
michael@0 158 * is NULL, the storage for the descriptor will be
michael@0 159 * allocated on the heap.
michael@0 160 * \param[in] fmt Format for the image
michael@0 161 * \param[in] d_w Width of the image
michael@0 162 * \param[in] d_h Height of the image
michael@0 163 * \param[in] align Alignment, in bytes, of the image buffer and
michael@0 164 * each row in the image(stride).
michael@0 165 *
michael@0 166 * \return Returns a pointer to the initialized image descriptor. If the img
michael@0 167 * parameter is non-null, the value of the img parameter will be
michael@0 168 * returned.
michael@0 169 */
michael@0 170 vpx_image_t *vpx_img_alloc(vpx_image_t *img,
michael@0 171 vpx_img_fmt_t fmt,
michael@0 172 unsigned int d_w,
michael@0 173 unsigned int d_h,
michael@0 174 unsigned int align);
michael@0 175
michael@0 176 /*!\brief Open a descriptor, using existing storage for the underlying image
michael@0 177 *
michael@0 178 * Returns a descriptor for storing an image of the given format. The
michael@0 179 * storage for descriptor has been allocated elsewhere, and a descriptor is
michael@0 180 * desired to "wrap" that storage.
michael@0 181 *
michael@0 182 * \param[in] img Pointer to storage for descriptor. If this parameter
michael@0 183 * is NULL, the storage for the descriptor will be
michael@0 184 * allocated on the heap.
michael@0 185 * \param[in] fmt Format for the image
michael@0 186 * \param[in] d_w Width of the image
michael@0 187 * \param[in] d_h Height of the image
michael@0 188 * \param[in] align Alignment, in bytes, of each row in the image.
michael@0 189 * \param[in] img_data Storage to use for the image
michael@0 190 *
michael@0 191 * \return Returns a pointer to the initialized image descriptor. If the img
michael@0 192 * parameter is non-null, the value of the img parameter will be
michael@0 193 * returned.
michael@0 194 */
michael@0 195 vpx_image_t *vpx_img_wrap(vpx_image_t *img,
michael@0 196 vpx_img_fmt_t fmt,
michael@0 197 unsigned int d_w,
michael@0 198 unsigned int d_h,
michael@0 199 unsigned int align,
michael@0 200 unsigned char *img_data);
michael@0 201
michael@0 202
michael@0 203 /*!\brief Set the rectangle identifying the displayed portion of the image
michael@0 204 *
michael@0 205 * Updates the displayed rectangle (aka viewport) on the image surface to
michael@0 206 * match the specified coordinates and size.
michael@0 207 *
michael@0 208 * \param[in] img Image descriptor
michael@0 209 * \param[in] x leftmost column
michael@0 210 * \param[in] y topmost row
michael@0 211 * \param[in] w width
michael@0 212 * \param[in] h height
michael@0 213 *
michael@0 214 * \return 0 if the requested rectangle is valid, nonzero otherwise.
michael@0 215 */
michael@0 216 int vpx_img_set_rect(vpx_image_t *img,
michael@0 217 unsigned int x,
michael@0 218 unsigned int y,
michael@0 219 unsigned int w,
michael@0 220 unsigned int h);
michael@0 221
michael@0 222
michael@0 223 /*!\brief Flip the image vertically (top for bottom)
michael@0 224 *
michael@0 225 * Adjusts the image descriptor's pointers and strides to make the image
michael@0 226 * be referenced upside-down.
michael@0 227 *
michael@0 228 * \param[in] img Image descriptor
michael@0 229 */
michael@0 230 void vpx_img_flip(vpx_image_t *img);
michael@0 231
michael@0 232 /*!\brief Close an image descriptor
michael@0 233 *
michael@0 234 * Frees all allocated storage associated with an image descriptor.
michael@0 235 *
michael@0 236 * \param[in] img Image descriptor
michael@0 237 */
michael@0 238 void vpx_img_free(vpx_image_t *img);
michael@0 239
michael@0 240 #endif
michael@0 241 #ifdef __cplusplus
michael@0 242 }
michael@0 243 #endif

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