2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
13 * \brief Describes the vpx image descriptor and associated operations
16 #ifndef VPX_VPX_IMAGE_H_
17 #define VPX_VPX_IMAGE_H_
23 /*!\brief Current ABI version number
26 * If this file is altered in any way that changes the ABI, this value
27 * must be bumped. Examples include, but are not limited to, changing
28 * types, removing or reassigning enums, adding/removing/rearranging
29 * fields to structures
31 #define VPX_IMAGE_ABI_VERSION (2) /**<\hideinitializer*/
34 #define VPX_IMG_FMT_PLANAR 0x100 /**< Image is a planar format. */
35 #define VPX_IMG_FMT_UV_FLIP 0x200 /**< V plane precedes U in memory. */
36 #define VPX_IMG_FMT_HAS_ALPHA 0x400 /**< Image has an alpha channel. */
37 #define VPX_IMG_FMT_HIGHBITDEPTH 0x800 /**< Image uses 16bit framebuffer. */
39 /*!\brief List of supported image formats */
40 typedef enum vpx_img_fmt {
42 VPX_IMG_FMT_RGB24, /**< 24 bit per pixel packed RGB */
43 VPX_IMG_FMT_RGB32, /**< 32 bit per pixel packed 0RGB */
44 VPX_IMG_FMT_RGB565, /**< 16 bit per pixel, 565 */
45 VPX_IMG_FMT_RGB555, /**< 16 bit per pixel, 555 */
46 VPX_IMG_FMT_UYVY, /**< UYVY packed YUV */
47 VPX_IMG_FMT_YUY2, /**< YUYV packed YUV */
48 VPX_IMG_FMT_YVYU, /**< YVYU packed YUV */
49 VPX_IMG_FMT_BGR24, /**< 24 bit per pixel packed BGR */
50 VPX_IMG_FMT_RGB32_LE, /**< 32 bit packed BGR0 */
51 VPX_IMG_FMT_ARGB, /**< 32 bit packed ARGB, alpha=255 */
52 VPX_IMG_FMT_ARGB_LE, /**< 32 bit packed BGRA, alpha=255 */
53 VPX_IMG_FMT_RGB565_LE, /**< 16 bit per pixel, gggbbbbb rrrrrggg */
54 VPX_IMG_FMT_RGB555_LE, /**< 16 bit per pixel, gggbbbbb 0rrrrrgg */
55 VPX_IMG_FMT_YV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 1, /**< planar YVU */
56 VPX_IMG_FMT_I420 = VPX_IMG_FMT_PLANAR | 2,
57 VPX_IMG_FMT_VPXYV12 = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_UV_FLIP | 3, /** < planar 4:2:0 format with vpx color space */
58 VPX_IMG_FMT_VPXI420 = VPX_IMG_FMT_PLANAR | 4,
59 VPX_IMG_FMT_I422 = VPX_IMG_FMT_PLANAR | 5,
60 VPX_IMG_FMT_I444 = VPX_IMG_FMT_PLANAR | 6,
61 VPX_IMG_FMT_444A = VPX_IMG_FMT_PLANAR | VPX_IMG_FMT_HAS_ALPHA | 7,
62 VPX_IMG_FMT_I42016 = VPX_IMG_FMT_I420 | VPX_IMG_FMT_HIGHBITDEPTH,
63 VPX_IMG_FMT_I42216 = VPX_IMG_FMT_I422 | VPX_IMG_FMT_HIGHBITDEPTH,
64 VPX_IMG_FMT_I44416 = VPX_IMG_FMT_I444 | VPX_IMG_FMT_HIGHBITDEPTH
65 } vpx_img_fmt_t; /**< alias for enum vpx_img_fmt */
67 #if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
68 #define IMG_FMT_PLANAR VPX_IMG_FMT_PLANAR /**< \deprecated Use #VPX_IMG_FMT_PLANAR */
69 #define IMG_FMT_UV_FLIP VPX_IMG_FMT_UV_FLIP /**< \deprecated Use #VPX_IMG_FMT_UV_FLIP */
70 #define IMG_FMT_HAS_ALPHA VPX_IMG_FMT_HAS_ALPHA /**< \deprecated Use #VPX_IMG_FMT_HAS_ALPHA */
72 /*!\brief Deprecated list of supported image formats
73 * \deprecated New code should use #vpx_img_fmt
75 #define img_fmt vpx_img_fmt
76 /*!\brief alias for enum img_fmt.
77 * \deprecated New code should use #vpx_img_fmt_t
79 #define img_fmt_t vpx_img_fmt_t
81 #define IMG_FMT_NONE VPX_IMG_FMT_NONE /**< \deprecated Use #VPX_IMG_FMT_NONE */
82 #define IMG_FMT_RGB24 VPX_IMG_FMT_RGB24 /**< \deprecated Use #VPX_IMG_FMT_RGB24 */
83 #define IMG_FMT_RGB32 VPX_IMG_FMT_RGB32 /**< \deprecated Use #VPX_IMG_FMT_RGB32 */
84 #define IMG_FMT_RGB565 VPX_IMG_FMT_RGB565 /**< \deprecated Use #VPX_IMG_FMT_RGB565 */
85 #define IMG_FMT_RGB555 VPX_IMG_FMT_RGB555 /**< \deprecated Use #VPX_IMG_FMT_RGB555 */
86 #define IMG_FMT_UYVY VPX_IMG_FMT_UYVY /**< \deprecated Use #VPX_IMG_FMT_UYVY */
87 #define IMG_FMT_YUY2 VPX_IMG_FMT_YUY2 /**< \deprecated Use #VPX_IMG_FMT_YUY2 */
88 #define IMG_FMT_YVYU VPX_IMG_FMT_YVYU /**< \deprecated Use #VPX_IMG_FMT_YVYU */
89 #define IMG_FMT_BGR24 VPX_IMG_FMT_BGR24 /**< \deprecated Use #VPX_IMG_FMT_BGR24 */
90 #define IMG_FMT_RGB32_LE VPX_IMG_FMT_RGB32_LE /**< \deprecated Use #VPX_IMG_FMT_RGB32_LE */
91 #define IMG_FMT_ARGB VPX_IMG_FMT_ARGB /**< \deprecated Use #VPX_IMG_FMT_ARGB */
92 #define IMG_FMT_ARGB_LE VPX_IMG_FMT_ARGB_LE /**< \deprecated Use #VPX_IMG_FMT_ARGB_LE */
93 #define IMG_FMT_RGB565_LE VPX_IMG_FMT_RGB565_LE /**< \deprecated Use #VPX_IMG_FMT_RGB565_LE */
94 #define IMG_FMT_RGB555_LE VPX_IMG_FMT_RGB555_LE /**< \deprecated Use #VPX_IMG_FMT_RGB555_LE */
95 #define IMG_FMT_YV12 VPX_IMG_FMT_YV12 /**< \deprecated Use #VPX_IMG_FMT_YV12 */
96 #define IMG_FMT_I420 VPX_IMG_FMT_I420 /**< \deprecated Use #VPX_IMG_FMT_I420 */
97 #define IMG_FMT_VPXYV12 VPX_IMG_FMT_VPXYV12 /**< \deprecated Use #VPX_IMG_FMT_VPXYV12 */
98 #define IMG_FMT_VPXI420 VPX_IMG_FMT_VPXI420 /**< \deprecated Use #VPX_IMG_FMT_VPXI420 */
99 #endif /* VPX_CODEC_DISABLE_COMPAT */
101 /**\brief Image Descriptor */
102 typedef struct vpx_image {
103 vpx_img_fmt_t fmt; /**< Image Format */
105 /* Image storage dimensions */
106 unsigned int w; /**< Stored image width */
107 unsigned int h; /**< Stored image height */
108 unsigned int bit_depth; /**< Stored image bit-depth */
110 /* Image display dimensions */
111 unsigned int d_w; /**< Displayed image width */
112 unsigned int d_h; /**< Displayed image height */
114 /* Chroma subsampling info */
115 unsigned int x_chroma_shift; /**< subsampling order, X */
116 unsigned int y_chroma_shift; /**< subsampling order, Y */
118 /* Image data pointers. */
119 #define VPX_PLANE_PACKED 0 /**< To be used for all packed formats */
120 #define VPX_PLANE_Y 0 /**< Y (Luminance) plane */
121 #define VPX_PLANE_U 1 /**< U (Chroma) plane */
122 #define VPX_PLANE_V 2 /**< V (Chroma) plane */
123 #define VPX_PLANE_ALPHA 3 /**< A (Transparency) plane */
124 #if !defined(VPX_CODEC_DISABLE_COMPAT) || !VPX_CODEC_DISABLE_COMPAT
125 #define PLANE_PACKED VPX_PLANE_PACKED
126 #define PLANE_Y VPX_PLANE_Y
127 #define PLANE_U VPX_PLANE_U
128 #define PLANE_V VPX_PLANE_V
129 #define PLANE_ALPHA VPX_PLANE_ALPHA
131 unsigned char *planes[4]; /**< pointer to the top left pixel for each plane */
132 int stride[4]; /**< stride between rows for each plane */
134 int bps; /**< bits per sample (for packed formats) */
136 /* The following member may be set by the application to associate data
139 void *user_priv; /**< may be set by the application to associate data
140 * with this image. */
142 /* The following members should be treated as private. */
143 unsigned char *img_data; /**< private */
144 int img_data_owner; /**< private */
145 int self_allocd; /**< private */
147 void *fb_priv; /**< Frame buffer data associated with the image. */
148 } vpx_image_t; /**< alias for struct vpx_image */
150 /**\brief Representation of a rectangle on a surface */
151 typedef struct vpx_image_rect {
152 unsigned int x; /**< leftmost column */
153 unsigned int y; /**< topmost row */
154 unsigned int w; /**< width */
155 unsigned int h; /**< height */
156 } vpx_image_rect_t; /**< alias for struct vpx_image_rect */
158 /*!\brief Open a descriptor, allocating storage for the underlying image
160 * Returns a descriptor for storing an image of the given format. The
161 * storage for the descriptor is allocated on the heap.
163 * \param[in] img Pointer to storage for descriptor. If this parameter
164 * is NULL, the storage for the descriptor will be
165 * allocated on the heap.
166 * \param[in] fmt Format for the image
167 * \param[in] d_w Width of the image
168 * \param[in] d_h Height of the image
169 * \param[in] align Alignment, in bytes, of the image buffer and
170 * each row in the image(stride).
172 * \return Returns a pointer to the initialized image descriptor. If the img
173 * parameter is non-null, the value of the img parameter will be
176 vpx_image_t *vpx_img_alloc(vpx_image_t *img,
182 /*!\brief Open a descriptor, using existing storage for the underlying image
184 * Returns a descriptor for storing an image of the given format. The
185 * storage for descriptor has been allocated elsewhere, and a descriptor is
186 * desired to "wrap" that storage.
188 * \param[in] img Pointer to storage for descriptor. If this parameter
189 * is NULL, the storage for the descriptor will be
190 * allocated on the heap.
191 * \param[in] fmt Format for the image
192 * \param[in] d_w Width of the image
193 * \param[in] d_h Height of the image
194 * \param[in] align Alignment, in bytes, of each row in the image.
195 * \param[in] img_data Storage to use for the image
197 * \return Returns a pointer to the initialized image descriptor. If the img
198 * parameter is non-null, the value of the img parameter will be
201 vpx_image_t *vpx_img_wrap(vpx_image_t *img,
206 unsigned char *img_data);
209 /*!\brief Set the rectangle identifying the displayed portion of the image
211 * Updates the displayed rectangle (aka viewport) on the image surface to
212 * match the specified coordinates and size.
214 * \param[in] img Image descriptor
215 * \param[in] x leftmost column
216 * \param[in] y topmost row
218 * \param[in] h height
220 * \return 0 if the requested rectangle is valid, nonzero otherwise.
222 int vpx_img_set_rect(vpx_image_t *img,
229 /*!\brief Flip the image vertically (top for bottom)
231 * Adjusts the image descriptor's pointers and strides to make the image
232 * be referenced upside-down.
234 * \param[in] img Image descriptor
236 void vpx_img_flip(vpx_image_t *img);
238 /*!\brief Close an image descriptor
240 * Frees all allocated storage associated with an image descriptor.
242 * \param[in] img Image descriptor
244 void vpx_img_free(vpx_image_t *img);
250 #endif // VPX_VPX_IMAGE_H_