| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #ifndef AVUTIL_IMGUTILS_H | ||
| 20 | #define AVUTIL_IMGUTILS_H | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * misc image utilities | ||
| 25 | * | ||
| 26 | * @addtogroup lavu_picture | ||
| 27 | * @{ | ||
| 28 | */ | ||
| 29 | |||
| 30 | #include <stddef.h> | ||
| 31 | #include <stdint.h> | ||
| 32 | #include "pixdesc.h" | ||
| 33 | #include "pixfmt.h" | ||
| 34 | #include "rational.h" | ||
| 35 | |||
| 36 | /** | ||
| 37 | * Compute the max pixel step for each plane of an image with a | ||
| 38 | * format described by pixdesc. | ||
| 39 | * | ||
| 40 | * The pixel step is the distance in bytes between the first byte of | ||
| 41 | * the group of bytes which describe a pixel component and the first | ||
| 42 | * byte of the successive group in the same plane for the same | ||
| 43 | * component. | ||
| 44 | * | ||
| 45 | * @param max_pixsteps an array which is filled with the max pixel step | ||
| 46 | * for each plane. Since a plane may contain different pixel | ||
| 47 | * components, the computed max_pixsteps[plane] is relative to the | ||
| 48 | * component in the plane with the max pixel step. | ||
| 49 | * @param max_pixstep_comps an array which is filled with the component | ||
| 50 | * for each plane which has the max pixel step. May be NULL. | ||
| 51 | * @param pixdesc the AVPixFmtDescriptor for the image, describing its format | ||
| 52 | */ | ||
| 53 | void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], | ||
| 54 | const AVPixFmtDescriptor *pixdesc); | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Compute the size of an image line with format pix_fmt and width | ||
| 58 | * width for the plane plane. | ||
| 59 | * | ||
| 60 | * @return the computed size in bytes | ||
| 61 | */ | ||
| 62 | int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane); | ||
| 63 | |||
| 64 | /** | ||
| 65 | * Fill plane linesizes for an image with pixel format pix_fmt and | ||
| 66 | * width width. | ||
| 67 | * | ||
| 68 | * @param linesizes array to be filled with the linesize for each plane | ||
| 69 | * @param pix_fmt the AVPixelFormat of the image | ||
| 70 | * @param width width of the image in pixels | ||
| 71 | * @return >= 0 in case of success, a negative error code otherwise | ||
| 72 | */ | ||
| 73 | int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width); | ||
| 74 | |||
| 75 | /** | ||
| 76 | * Fill plane sizes for an image with pixel format pix_fmt and height height. | ||
| 77 | * | ||
| 78 | * @param size the array to be filled with the size of each image plane | ||
| 79 | * @param pix_fmt the AVPixelFormat of the image | ||
| 80 | * @param height height of the image in pixels | ||
| 81 | * @param linesizes the array containing the linesize for each | ||
| 82 | * plane, should be filled by av_image_fill_linesizes() | ||
| 83 | * @return >= 0 in case of success, a negative error code otherwise | ||
| 84 | * | ||
| 85 | * @note The linesize parameters have the type ptrdiff_t here, while they are | ||
| 86 | * int for av_image_fill_linesizes(). | ||
| 87 | */ | ||
| 88 | int av_image_fill_plane_sizes(size_t size[4], enum AVPixelFormat pix_fmt, | ||
| 89 | int height, const ptrdiff_t linesizes[4]); | ||
| 90 | |||
| 91 | /** | ||
| 92 | * Fill plane data pointers for an image with pixel format pix_fmt and | ||
| 93 | * height height. | ||
| 94 | * | ||
| 95 | * @param data pointers array to be filled with the pointer for each image plane | ||
| 96 | * @param pix_fmt the AVPixelFormat of the image | ||
| 97 | * @param height height of the image in pixels | ||
| 98 | * @param ptr the pointer to a buffer which will contain the image | ||
| 99 | * @param linesizes the array containing the linesize for each | ||
| 100 | * plane, should be filled by av_image_fill_linesizes() | ||
| 101 | * @return the size in bytes required for the image buffer, a negative | ||
| 102 | * error code in case of failure | ||
| 103 | */ | ||
| 104 | int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height, | ||
| 105 | uint8_t *ptr, const int linesizes[4]); | ||
| 106 | |||
| 107 | /** | ||
| 108 | * Allocate an image with size w and h and pixel format pix_fmt, and | ||
| 109 | * fill pointers and linesizes accordingly. | ||
| 110 | * The allocated image buffer has to be freed by using | ||
| 111 | * av_freep(&pointers[0]). | ||
| 112 | * | ||
| 113 | * @param pointers array to be filled with the pointer for each image plane | ||
| 114 | * @param linesizes the array filled with the linesize for each plane | ||
| 115 | * @param w width of the image in pixels | ||
| 116 | * @param h height of the image in pixels | ||
| 117 | * @param pix_fmt the AVPixelFormat of the image | ||
| 118 | * @param align the value to use for buffer size alignment | ||
| 119 | * @return the size in bytes required for the image buffer, a negative | ||
| 120 | * error code in case of failure | ||
| 121 | */ | ||
| 122 | int av_image_alloc(uint8_t *pointers[4], int linesizes[4], | ||
| 123 | int w, int h, enum AVPixelFormat pix_fmt, int align); | ||
| 124 | |||
| 125 | /** | ||
| 126 | * Copy image plane from src to dst. | ||
| 127 | * That is, copy "height" number of lines of "bytewidth" bytes each. | ||
| 128 | * The first byte of each successive line is separated by *_linesize | ||
| 129 | * bytes. | ||
| 130 | * | ||
| 131 | * bytewidth must be contained by both absolute values of dst_linesize | ||
| 132 | * and src_linesize, otherwise the function behavior is undefined. | ||
| 133 | * | ||
| 134 | * @param dst destination plane to copy to | ||
| 135 | * @param dst_linesize linesize for the image plane in dst | ||
| 136 | * @param src source plane to copy from | ||
| 137 | * @param src_linesize linesize for the image plane in src | ||
| 138 | * @param height height (number of lines) of the plane | ||
| 139 | */ | ||
| 140 | void av_image_copy_plane(uint8_t *dst, int dst_linesize, | ||
| 141 | const uint8_t *src, int src_linesize, | ||
| 142 | int bytewidth, int height); | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Copy image data located in uncacheable (e.g. GPU mapped) memory. Where | ||
| 146 | * available, this function will use special functionality for reading from such | ||
| 147 | * memory, which may result in greatly improved performance compared to plain | ||
| 148 | * av_image_copy_plane(). | ||
| 149 | * | ||
| 150 | * bytewidth must be contained by both absolute values of dst_linesize | ||
| 151 | * and src_linesize, otherwise the function behavior is undefined. | ||
| 152 | * | ||
| 153 | * @note The linesize parameters have the type ptrdiff_t here, while they are | ||
| 154 | * int for av_image_copy_plane(). | ||
| 155 | * @note On x86, the linesizes currently need to be aligned to the cacheline | ||
| 156 | * size (i.e. 64) to get improved performance. | ||
| 157 | */ | ||
| 158 | void av_image_copy_plane_uc_from(uint8_t *dst, ptrdiff_t dst_linesize, | ||
| 159 | const uint8_t *src, ptrdiff_t src_linesize, | ||
| 160 | ptrdiff_t bytewidth, int height); | ||
| 161 | |||
| 162 | /** | ||
| 163 | * Copy image in src_data to dst_data. | ||
| 164 | * | ||
| 165 | * @param dst_data destination image data buffer to copy to | ||
| 166 | * @param dst_linesizes linesizes for the image in dst_data | ||
| 167 | * @param src_data source image data buffer to copy from | ||
| 168 | * @param src_linesizes linesizes for the image in src_data | ||
| 169 | * @param pix_fmt the AVPixelFormat of the image | ||
| 170 | * @param width width of the image in pixels | ||
| 171 | * @param height height of the image in pixels | ||
| 172 | */ | ||
| 173 | void av_image_copy(uint8_t * const dst_data[4], const int dst_linesizes[4], | ||
| 174 | const uint8_t * const src_data[4], const int src_linesizes[4], | ||
| 175 | enum AVPixelFormat pix_fmt, int width, int height); | ||
| 176 | |||
| 177 | /** | ||
| 178 | * Wrapper around av_image_copy() to workaround the limitation | ||
| 179 | * that the conversion from uint8_t * const * to const uint8_t * const * | ||
| 180 | * is not performed automatically in C. | ||
| 181 | * @see av_image_copy() | ||
| 182 | */ | ||
| 183 | static inline | ||
| 184 | 10799 | void av_image_copy2(uint8_t * const dst_data[4], const int dst_linesizes[4], | |
| 185 | uint8_t * const src_data[4], const int src_linesizes[4], | ||
| 186 | enum AVPixelFormat pix_fmt, int width, int height) | ||
| 187 | { | ||
| 188 | 10799 | av_image_copy(dst_data, dst_linesizes, | |
| 189 | (const uint8_t * const *)src_data, src_linesizes, | ||
| 190 | pix_fmt, width, height); | ||
| 191 | 10799 | } | |
| 192 | |||
| 193 | /** | ||
| 194 | * Copy image data located in uncacheable (e.g. GPU mapped) memory. Where | ||
| 195 | * available, this function will use special functionality for reading from such | ||
| 196 | * memory, which may result in greatly improved performance compared to plain | ||
| 197 | * av_image_copy(). | ||
| 198 | * | ||
| 199 | * The data pointers and the linesizes must be aligned to the maximum required | ||
| 200 | * by the CPU architecture. | ||
| 201 | * | ||
| 202 | * @note The linesize parameters have the type ptrdiff_t here, while they are | ||
| 203 | * int for av_image_copy(). | ||
| 204 | * @note On x86, the linesizes currently need to be aligned to the cacheline | ||
| 205 | * size (i.e. 64) to get improved performance. | ||
| 206 | */ | ||
| 207 | void av_image_copy_uc_from(uint8_t * const dst_data[4], const ptrdiff_t dst_linesizes[4], | ||
| 208 | const uint8_t * const src_data[4], const ptrdiff_t src_linesizes[4], | ||
| 209 | enum AVPixelFormat pix_fmt, int width, int height); | ||
| 210 | |||
| 211 | /** | ||
| 212 | * Setup the data pointers and linesizes based on the specified image | ||
| 213 | * parameters and the provided array. | ||
| 214 | * | ||
| 215 | * The fields of the given image are filled in by using the src | ||
| 216 | * address which points to the image data buffer. Depending on the | ||
| 217 | * specified pixel format, one or multiple image data pointers and | ||
| 218 | * line sizes will be set. If a planar format is specified, several | ||
| 219 | * pointers will be set pointing to the different picture planes and | ||
| 220 | * the line sizes of the different planes will be stored in the | ||
| 221 | * lines_sizes array. Call with src == NULL to get the required | ||
| 222 | * size for the src buffer. | ||
| 223 | * | ||
| 224 | * To allocate the buffer and fill in the dst_data and dst_linesize in | ||
| 225 | * one call, use av_image_alloc(). | ||
| 226 | * | ||
| 227 | * @param dst_data data pointers to be filled in | ||
| 228 | * @param dst_linesize linesizes for the image in dst_data to be filled in | ||
| 229 | * @param src buffer which will contain or contains the actual image data, can be NULL | ||
| 230 | * @param pix_fmt the pixel format of the image | ||
| 231 | * @param width the width of the image in pixels | ||
| 232 | * @param height the height of the image in pixels | ||
| 233 | * @param align the value used in src for linesize alignment | ||
| 234 | * @return the size in bytes required for src, a negative error code | ||
| 235 | * in case of failure | ||
| 236 | */ | ||
| 237 | int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], | ||
| 238 | const uint8_t *src, | ||
| 239 | enum AVPixelFormat pix_fmt, int width, int height, int align); | ||
| 240 | |||
| 241 | /** | ||
| 242 | * Return the size in bytes of the amount of data required to store an | ||
| 243 | * image with the given parameters. | ||
| 244 | * | ||
| 245 | * @param pix_fmt the pixel format of the image | ||
| 246 | * @param width the width of the image in pixels | ||
| 247 | * @param height the height of the image in pixels | ||
| 248 | * @param align the assumed linesize alignment | ||
| 249 | * @return the buffer size in bytes, a negative error code in case of failure | ||
| 250 | */ | ||
| 251 | int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align); | ||
| 252 | |||
| 253 | /** | ||
| 254 | * Copy image data from an image into a buffer. | ||
| 255 | * | ||
| 256 | * av_image_get_buffer_size() can be used to compute the required size | ||
| 257 | * for the buffer to fill. | ||
| 258 | * | ||
| 259 | * @param dst a buffer into which picture data will be copied | ||
| 260 | * @param dst_size the size in bytes of dst | ||
| 261 | * @param src_data pointers containing the source image data | ||
| 262 | * @param src_linesize linesizes for the image in src_data | ||
| 263 | * @param pix_fmt the pixel format of the source image | ||
| 264 | * @param width the width of the source image in pixels | ||
| 265 | * @param height the height of the source image in pixels | ||
| 266 | * @param align the assumed linesize alignment for dst | ||
| 267 | * @return the number of bytes written to dst, or a negative value | ||
| 268 | * (error code) on error | ||
| 269 | */ | ||
| 270 | int av_image_copy_to_buffer(uint8_t *dst, int dst_size, | ||
| 271 | const uint8_t * const src_data[4], const int src_linesize[4], | ||
| 272 | enum AVPixelFormat pix_fmt, int width, int height, int align); | ||
| 273 | |||
| 274 | /** | ||
| 275 | * Check if the given dimension of an image is valid, meaning that all | ||
| 276 | * bytes of the image can be addressed with a signed int. | ||
| 277 | * | ||
| 278 | * @param w the width of the picture | ||
| 279 | * @param h the height of the picture | ||
| 280 | * @param log_offset the offset to sum to the log level for logging with log_ctx | ||
| 281 | * @param log_ctx the parent logging context, it may be NULL | ||
| 282 | * @return >= 0 if valid, a negative error code otherwise | ||
| 283 | */ | ||
| 284 | int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx); | ||
| 285 | |||
| 286 | /** | ||
| 287 | * Check if the given dimension of an image is valid, meaning that all | ||
| 288 | * bytes of a plane of an image with the specified pix_fmt can be addressed | ||
| 289 | * with a signed int. | ||
| 290 | * | ||
| 291 | * @param w the width of the picture | ||
| 292 | * @param h the height of the picture | ||
| 293 | * @param max_pixels the maximum number of pixels the user wants to accept | ||
| 294 | * @param pix_fmt the pixel format, can be AV_PIX_FMT_NONE if unknown. | ||
| 295 | * @param log_offset the offset to sum to the log level for logging with log_ctx | ||
| 296 | * @param log_ctx the parent logging context, it may be NULL | ||
| 297 | * @return >= 0 if valid, a negative error code otherwise | ||
| 298 | */ | ||
| 299 | int av_image_check_size2(unsigned int w, unsigned int h, int64_t max_pixels, enum AVPixelFormat pix_fmt, int log_offset, void *log_ctx); | ||
| 300 | |||
| 301 | /** | ||
| 302 | * Check if the given sample aspect ratio of an image is valid. | ||
| 303 | * | ||
| 304 | * It is considered invalid if the denominator is 0 or if applying the ratio | ||
| 305 | * to the image size would make the smaller dimension less than 1. If the | ||
| 306 | * sar numerator is 0, it is considered unknown and will return as valid. | ||
| 307 | * | ||
| 308 | * @param w width of the image | ||
| 309 | * @param h height of the image | ||
| 310 | * @param sar sample aspect ratio of the image | ||
| 311 | * @return 0 if valid, a negative AVERROR code otherwise | ||
| 312 | */ | ||
| 313 | int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar); | ||
| 314 | |||
| 315 | /** | ||
| 316 | * Overwrite the image data with black. This is suitable for filling a | ||
| 317 | * sub-rectangle of an image, meaning the padding between the right most pixel | ||
| 318 | * and the left most pixel on the next line will not be overwritten. For some | ||
| 319 | * formats, the image size might be rounded up due to inherent alignment. | ||
| 320 | * | ||
| 321 | * If the pixel format has alpha, the alpha is cleared to opaque. | ||
| 322 | * | ||
| 323 | * This can return an error if the pixel format is not supported. Normally, all | ||
| 324 | * non-hwaccel pixel formats should be supported. | ||
| 325 | * | ||
| 326 | * Passing NULL for dst_data is allowed. Then the function returns whether the | ||
| 327 | * operation would have succeeded. (It can return an error if the pix_fmt is | ||
| 328 | * not supported.) | ||
| 329 | * | ||
| 330 | * @param dst_data data pointers to destination image | ||
| 331 | * @param dst_linesize linesizes for the destination image | ||
| 332 | * @param pix_fmt the pixel format of the image | ||
| 333 | * @param range the color range of the image (important for colorspaces such as YUV) | ||
| 334 | * @param width the width of the image in pixels | ||
| 335 | * @param height the height of the image in pixels | ||
| 336 | * @return 0 if the image data was cleared, a negative AVERROR code otherwise | ||
| 337 | */ | ||
| 338 | int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4], | ||
| 339 | enum AVPixelFormat pix_fmt, enum AVColorRange range, | ||
| 340 | int width, int height); | ||
| 341 | |||
| 342 | /** | ||
| 343 | * Overwrite the image data with a color. This is suitable for filling a | ||
| 344 | * sub-rectangle of an image, meaning the padding between the right most pixel | ||
| 345 | * and the left most pixel on the next line will not be overwritten. For some | ||
| 346 | * formats, the image size might be rounded up due to inherent alignment. | ||
| 347 | * | ||
| 348 | * If the pixel format has alpha, it is also replaced. Color component values | ||
| 349 | * are interpreted as native integers (or intfloats) regardless of actual pixel | ||
| 350 | * format endianness. | ||
| 351 | * | ||
| 352 | * This can return an error if the pixel format is not supported. Normally, all | ||
| 353 | * non-hwaccel pixel formats should be supported. | ||
| 354 | * | ||
| 355 | * Passing NULL for dst_data is allowed. Then the function returns whether the | ||
| 356 | * operation would have succeeded. (It can return an error if the pix_fmt is | ||
| 357 | * not supported.) | ||
| 358 | * | ||
| 359 | * @param dst_data data pointers to destination image | ||
| 360 | * @param dst_linesize linesizes for the destination image | ||
| 361 | * @param pix_fmt the pixel format of the image | ||
| 362 | * @param color the color components to be used for the fill | ||
| 363 | * @param width the width of the image in pixels | ||
| 364 | * @param height the height of the image in pixels | ||
| 365 | * @param flags currently unused | ||
| 366 | * @return 0 if the image data was filled, a negative AVERROR code otherwise | ||
| 367 | */ | ||
| 368 | int av_image_fill_color(uint8_t * const dst_data[4], const ptrdiff_t dst_linesize[4], | ||
| 369 | enum AVPixelFormat pix_fmt, const uint32_t color[4], | ||
| 370 | int width, int height, int flags); | ||
| 371 | |||
| 372 | /** | ||
| 373 | * @} | ||
| 374 | */ | ||
| 375 | |||
| 376 | |||
| 377 | #endif /* AVUTIL_IMGUTILS_H */ | ||
| 378 |