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2ba45a60 DM |
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 | /** | |
20 | * @file | |
21 | * misc image utilities | |
22 | */ | |
23 | ||
24 | #include "avassert.h" | |
25 | #include "common.h" | |
26 | #include "imgutils.h" | |
27 | #include "internal.h" | |
28 | #include "intreadwrite.h" | |
29 | #include "log.h" | |
30 | #include "mathematics.h" | |
31 | #include "pixdesc.h" | |
32 | #include "rational.h" | |
33 | ||
34 | void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], | |
35 | const AVPixFmtDescriptor *pixdesc) | |
36 | { | |
37 | int i; | |
38 | memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0])); | |
39 | if (max_pixstep_comps) | |
40 | memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0])); | |
41 | ||
42 | for (i = 0; i < 4; i++) { | |
43 | const AVComponentDescriptor *comp = &(pixdesc->comp[i]); | |
44 | if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) { | |
45 | max_pixsteps[comp->plane] = comp->step_minus1+1; | |
46 | if (max_pixstep_comps) | |
47 | max_pixstep_comps[comp->plane] = i; | |
48 | } | |
49 | } | |
50 | } | |
51 | ||
52 | static inline | |
53 | int image_get_linesize(int width, int plane, | |
54 | int max_step, int max_step_comp, | |
55 | const AVPixFmtDescriptor *desc) | |
56 | { | |
57 | int s, shifted_w, linesize; | |
58 | ||
59 | if (!desc) | |
60 | return AVERROR(EINVAL); | |
61 | ||
62 | if (width < 0) | |
63 | return AVERROR(EINVAL); | |
64 | s = (max_step_comp == 1 || max_step_comp == 2) ? desc->log2_chroma_w : 0; | |
65 | shifted_w = ((width + (1 << s) - 1)) >> s; | |
66 | if (shifted_w && max_step > INT_MAX / shifted_w) | |
67 | return AVERROR(EINVAL); | |
68 | linesize = max_step * shifted_w; | |
69 | ||
70 | if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) | |
71 | linesize = (linesize + 7) >> 3; | |
72 | return linesize; | |
73 | } | |
74 | ||
75 | int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane) | |
76 | { | |
77 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
78 | int max_step [4]; /* max pixel step for each plane */ | |
79 | int max_step_comp[4]; /* the component for each plane which has the max pixel step */ | |
80 | ||
81 | if ((unsigned)pix_fmt >= AV_PIX_FMT_NB || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) | |
82 | return AVERROR(EINVAL); | |
83 | ||
84 | av_image_fill_max_pixsteps(max_step, max_step_comp, desc); | |
85 | return image_get_linesize(width, plane, max_step[plane], max_step_comp[plane], desc); | |
86 | } | |
87 | ||
88 | int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width) | |
89 | { | |
90 | int i, ret; | |
91 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
92 | int max_step [4]; /* max pixel step for each plane */ | |
93 | int max_step_comp[4]; /* the component for each plane which has the max pixel step */ | |
94 | ||
95 | memset(linesizes, 0, 4*sizeof(linesizes[0])); | |
96 | ||
97 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) | |
98 | return AVERROR(EINVAL); | |
99 | ||
100 | av_image_fill_max_pixsteps(max_step, max_step_comp, desc); | |
101 | for (i = 0; i < 4; i++) { | |
102 | if ((ret = image_get_linesize(width, i, max_step[i], max_step_comp[i], desc)) < 0) | |
103 | return ret; | |
104 | linesizes[i] = ret; | |
105 | } | |
106 | ||
107 | return 0; | |
108 | } | |
109 | ||
110 | int av_image_fill_pointers(uint8_t *data[4], enum AVPixelFormat pix_fmt, int height, | |
111 | uint8_t *ptr, const int linesizes[4]) | |
112 | { | |
113 | int i, total_size, size[4] = { 0 }, has_plane[4] = { 0 }; | |
114 | ||
115 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
116 | memset(data , 0, sizeof(data[0])*4); | |
117 | ||
118 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) | |
119 | return AVERROR(EINVAL); | |
120 | ||
121 | data[0] = ptr; | |
122 | if (linesizes[0] > (INT_MAX - 1024) / height) | |
123 | return AVERROR(EINVAL); | |
124 | size[0] = linesizes[0] * height; | |
125 | ||
126 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || | |
127 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) { | |
128 | size[0] = (size[0] + 3) & ~3; | |
129 | data[1] = ptr + size[0]; /* palette is stored here as 256 32 bits words */ | |
130 | return size[0] + 256 * 4; | |
131 | } | |
132 | ||
133 | for (i = 0; i < 4; i++) | |
134 | has_plane[desc->comp[i].plane] = 1; | |
135 | ||
136 | total_size = size[0]; | |
137 | for (i = 1; i < 4 && has_plane[i]; i++) { | |
138 | int h, s = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; | |
139 | data[i] = data[i-1] + size[i-1]; | |
140 | h = (height + (1 << s) - 1) >> s; | |
141 | if (linesizes[i] > INT_MAX / h) | |
142 | return AVERROR(EINVAL); | |
143 | size[i] = h * linesizes[i]; | |
144 | if (total_size > INT_MAX - size[i]) | |
145 | return AVERROR(EINVAL); | |
146 | total_size += size[i]; | |
147 | } | |
148 | ||
149 | return total_size; | |
150 | } | |
151 | ||
152 | int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt) | |
153 | { | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < 256; i++) { | |
157 | int r, g, b; | |
158 | ||
159 | switch (pix_fmt) { | |
160 | case AV_PIX_FMT_RGB8: | |
161 | r = (i>>5 )*36; | |
162 | g = ((i>>2)&7)*36; | |
163 | b = (i&3 )*85; | |
164 | break; | |
165 | case AV_PIX_FMT_BGR8: | |
166 | b = (i>>6 )*85; | |
167 | g = ((i>>3)&7)*36; | |
168 | r = (i&7 )*36; | |
169 | break; | |
170 | case AV_PIX_FMT_RGB4_BYTE: | |
171 | r = (i>>3 )*255; | |
172 | g = ((i>>1)&3)*85; | |
173 | b = (i&1 )*255; | |
174 | break; | |
175 | case AV_PIX_FMT_BGR4_BYTE: | |
176 | b = (i>>3 )*255; | |
177 | g = ((i>>1)&3)*85; | |
178 | r = (i&1 )*255; | |
179 | break; | |
180 | case AV_PIX_FMT_GRAY8: | |
181 | r = b = g = i; | |
182 | break; | |
183 | default: | |
184 | return AVERROR(EINVAL); | |
185 | } | |
186 | pal[i] = b + (g << 8) + (r << 16) + (0xFFU << 24); | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
192 | int av_image_alloc(uint8_t *pointers[4], int linesizes[4], | |
193 | int w, int h, enum AVPixelFormat pix_fmt, int align) | |
194 | { | |
195 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
196 | int i, ret; | |
197 | uint8_t *buf; | |
198 | ||
199 | if (!desc) | |
200 | return AVERROR(EINVAL); | |
201 | ||
202 | if ((ret = av_image_check_size(w, h, 0, NULL)) < 0) | |
203 | return ret; | |
204 | if ((ret = av_image_fill_linesizes(linesizes, pix_fmt, align>7 ? FFALIGN(w, 8) : w)) < 0) | |
205 | return ret; | |
206 | ||
207 | for (i = 0; i < 4; i++) | |
208 | linesizes[i] = FFALIGN(linesizes[i], align); | |
209 | ||
210 | if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, NULL, linesizes)) < 0) | |
211 | return ret; | |
212 | buf = av_malloc(ret + align); | |
213 | if (!buf) | |
214 | return AVERROR(ENOMEM); | |
215 | if ((ret = av_image_fill_pointers(pointers, pix_fmt, h, buf, linesizes)) < 0) { | |
216 | av_free(buf); | |
217 | return ret; | |
218 | } | |
219 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) | |
220 | avpriv_set_systematic_pal2((uint32_t*)pointers[1], pix_fmt); | |
221 | ||
222 | return ret; | |
223 | } | |
224 | ||
225 | typedef struct ImgUtils { | |
226 | const AVClass *class; | |
227 | int log_offset; | |
228 | void *log_ctx; | |
229 | } ImgUtils; | |
230 | ||
231 | static const AVClass imgutils_class = { "IMGUTILS", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT, offsetof(ImgUtils, log_offset), offsetof(ImgUtils, log_ctx) }; | |
232 | ||
233 | int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx) | |
234 | { | |
235 | ImgUtils imgutils = { &imgutils_class, log_offset, log_ctx }; | |
236 | ||
237 | if ((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/8) | |
238 | return 0; | |
239 | ||
240 | av_log(&imgutils, AV_LOG_ERROR, "Picture size %ux%u is invalid\n", w, h); | |
241 | return AVERROR(EINVAL); | |
242 | } | |
243 | ||
244 | int av_image_check_sar(unsigned int w, unsigned int h, AVRational sar) | |
245 | { | |
246 | int64_t scaled_dim; | |
247 | ||
248 | if (!sar.den) | |
249 | return AVERROR(EINVAL); | |
250 | ||
251 | if (!sar.num || sar.num == sar.den) | |
252 | return 0; | |
253 | ||
254 | if (sar.num < sar.den) | |
255 | scaled_dim = av_rescale_rnd(w, sar.num, sar.den, AV_ROUND_ZERO); | |
256 | else | |
257 | scaled_dim = av_rescale_rnd(h, sar.den, sar.num, AV_ROUND_ZERO); | |
258 | ||
259 | if (scaled_dim > 0) | |
260 | return 0; | |
261 | ||
262 | return AVERROR(EINVAL); | |
263 | } | |
264 | ||
265 | void av_image_copy_plane(uint8_t *dst, int dst_linesize, | |
266 | const uint8_t *src, int src_linesize, | |
267 | int bytewidth, int height) | |
268 | { | |
269 | if (!dst || !src) | |
270 | return; | |
271 | av_assert0(abs(src_linesize) >= bytewidth); | |
272 | av_assert0(abs(dst_linesize) >= bytewidth); | |
273 | for (;height > 0; height--) { | |
274 | memcpy(dst, src, bytewidth); | |
275 | dst += dst_linesize; | |
276 | src += src_linesize; | |
277 | } | |
278 | } | |
279 | ||
280 | void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], | |
281 | const uint8_t *src_data[4], const int src_linesizes[4], | |
282 | enum AVPixelFormat pix_fmt, int width, int height) | |
283 | { | |
284 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
285 | ||
286 | if (!desc || desc->flags & AV_PIX_FMT_FLAG_HWACCEL) | |
287 | return; | |
288 | ||
289 | if (desc->flags & AV_PIX_FMT_FLAG_PAL || | |
290 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) { | |
291 | av_image_copy_plane(dst_data[0], dst_linesizes[0], | |
292 | src_data[0], src_linesizes[0], | |
293 | width, height); | |
294 | /* copy the palette */ | |
295 | memcpy(dst_data[1], src_data[1], 4*256); | |
296 | } else { | |
297 | int i, planes_nb = 0; | |
298 | ||
299 | for (i = 0; i < desc->nb_components; i++) | |
300 | planes_nb = FFMAX(planes_nb, desc->comp[i].plane + 1); | |
301 | ||
302 | for (i = 0; i < planes_nb; i++) { | |
303 | int h = height; | |
304 | int bwidth = av_image_get_linesize(pix_fmt, width, i); | |
305 | if (bwidth < 0) { | |
306 | av_log(NULL, AV_LOG_ERROR, "av_image_get_linesize failed\n"); | |
307 | return; | |
308 | } | |
309 | if (i == 1 || i == 2) { | |
310 | h = FF_CEIL_RSHIFT(height, desc->log2_chroma_h); | |
311 | } | |
312 | av_image_copy_plane(dst_data[i], dst_linesizes[i], | |
313 | src_data[i], src_linesizes[i], | |
314 | bwidth, h); | |
315 | } | |
316 | } | |
317 | } | |
318 | ||
319 | int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], | |
320 | const uint8_t *src, | |
321 | enum AVPixelFormat pix_fmt, int width, int height, int align) | |
322 | { | |
323 | int ret, i; | |
324 | ||
325 | if ((ret = av_image_check_size(width, height, 0, NULL)) < 0) | |
326 | return ret; | |
327 | ||
328 | if ((ret = av_image_fill_linesizes(dst_linesize, pix_fmt, width)) < 0) | |
329 | return ret; | |
330 | ||
331 | for (i = 0; i < 4; i++) | |
332 | dst_linesize[i] = FFALIGN(dst_linesize[i], align); | |
333 | ||
2ba45a60 DM |
334 | return av_image_fill_pointers(dst_data, pix_fmt, height, (uint8_t *)src, dst_linesize); |
335 | } | |
336 | ||
337 | int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align) | |
338 | { | |
339 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
340 | uint8_t *data[4]; | |
341 | int linesize[4]; | |
342 | ||
343 | if (!desc) | |
344 | return AVERROR(EINVAL); | |
345 | if (av_image_check_size(width, height, 0, NULL) < 0) | |
346 | return AVERROR(EINVAL); | |
347 | if (desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) | |
348 | // do not include palette for these pseudo-paletted formats | |
349 | return width * height; | |
350 | return av_image_fill_arrays(data, linesize, NULL, pix_fmt, width, height, align); | |
351 | } | |
352 | ||
353 | int av_image_copy_to_buffer(uint8_t *dst, int dst_size, | |
354 | const uint8_t * const src_data[4], const int src_linesize[4], | |
355 | enum AVPixelFormat pix_fmt, int width, int height, int align) | |
356 | { | |
357 | int i, j, nb_planes = 0, linesize[4]; | |
358 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); | |
359 | int size = av_image_get_buffer_size(pix_fmt, width, height, align); | |
360 | ||
361 | if (size > dst_size || size < 0) | |
362 | return AVERROR(EINVAL); | |
363 | ||
364 | for (i = 0; i < desc->nb_components; i++) | |
365 | nb_planes = FFMAX(desc->comp[i].plane, nb_planes); | |
366 | nb_planes++; | |
367 | ||
368 | av_image_fill_linesizes(linesize, pix_fmt, width); | |
369 | for (i = 0; i < nb_planes; i++) { | |
370 | int h, shift = (i == 1 || i == 2) ? desc->log2_chroma_h : 0; | |
371 | const uint8_t *src = src_data[i]; | |
372 | h = (height + (1 << shift) - 1) >> shift; | |
373 | ||
374 | for (j = 0; j < h; j++) { | |
375 | memcpy(dst, src, linesize[i]); | |
376 | dst += FFALIGN(linesize[i], align); | |
377 | src += src_linesize[i]; | |
378 | } | |
379 | } | |
380 | ||
381 | if (desc->flags & AV_PIX_FMT_FLAG_PAL) { | |
382 | uint32_t *d32 = (uint32_t *)(((size_t)dst + 3) & ~3); | |
383 | for (i = 0; i<256; i++) | |
384 | AV_WL32(d32 + i, AV_RN32(src_data[1] + 4*i)); | |
385 | } | |
386 | ||
387 | return size; | |
388 | } |