FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavfilter/drawutils.c
Date: 2024-07-26 21:54:09
Exec Total Coverage
Lines: 331 387 85.5%
Functions: 19 19 100.0%
Branches: 209 262 79.8%
Line Branch Exec Source
1 /*
2 * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
3 * Copyright 2012 Nicolas George <nicolas.george normalesup org>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include <string.h>
23
24 #include "libavutil/avassert.h"
25 #include "libavutil/avutil.h"
26 #include "libavutil/csp.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/pixdesc.h"
29 #include "colorspace.h"
30 #include "drawutils.h"
31 #include "formats.h"
32
33 enum { RED = 0, GREEN, BLUE, ALPHA };
34
35 108 int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
36 {
37 108 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt);
38
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 108 if (!(desc->flags & AV_PIX_FMT_FLAG_RGB))
39 46 return AVERROR(EINVAL);
40
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 62 if (desc->flags & AV_PIX_FMT_FLAG_BITSTREAM)
41 ✗ return AVERROR(EINVAL);
42
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 62 av_assert0(desc->nb_components == 3 + !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA));
43
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 62 if (desc->flags & AV_PIX_FMT_FLAG_PLANAR) {
44 23 rgba_map[RED] = desc->comp[0].plane;
45 23 rgba_map[GREEN] = desc->comp[1].plane;
46 23 rgba_map[BLUE] = desc->comp[2].plane;
47
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 23 rgba_map[ALPHA] = (desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? desc->comp[3].plane : 3;
48 } else {
49 39 int had0 = 0;
50 39 unsigned depthb = 0;
51 unsigned i;
52
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 170 for (i = 0; i < desc->nb_components; i++) {
53 /* all components must have same depth in bytes */
54 131 unsigned db = (desc->comp[i].depth + 7) / 8;
55 131 unsigned pos = desc->comp[i].offset / db;
56
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 131 if (depthb && (depthb != db))
57 ✗ return AVERROR(ENOSYS);
58
59
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 131 if (desc->comp[i].offset % db)
60 ✗ return AVERROR(ENOSYS);
61
62 131 had0 |= pos == 0;
63 131 rgba_map[i] = pos;
64 131 depthb = db;
65 }
66
67
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 39 if (desc->nb_components == 3)
68
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 25 rgba_map[ALPHA] = had0 ? 3 : 0;
69 }
70
71
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 62 av_assert0(rgba_map[RED] != rgba_map[GREEN]);
72
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 62 av_assert0(rgba_map[GREEN] != rgba_map[BLUE]);
73
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 62 av_assert0(rgba_map[BLUE] != rgba_map[RED]);
74
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 62 av_assert0(rgba_map[RED] != rgba_map[ALPHA]);
75
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 62 av_assert0(rgba_map[GREEN] != rgba_map[ALPHA]);
76
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 62 av_assert0(rgba_map[BLUE] != rgba_map[ALPHA]);
77
78 62 return 0;
79 }
80
81 36698 int ff_draw_init2(FFDrawContext *draw, enum AVPixelFormat format, enum AVColorSpace csp,
82 enum AVColorRange range, unsigned flags)
83 {
84 36698 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
85 36698 const AVLumaCoefficients *luma = NULL;
86 const AVComponentDescriptor *c;
87 36698 unsigned i, nb_planes = 0;
88 36698 int pixelstep[MAX_PLANES] = { 0 };
89 36698 int depthb = 0;
90
91
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 36698 if (!desc || !desc->name)
92 ✗ return AVERROR(EINVAL);
93
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 36698 if (desc->flags & AV_PIX_FMT_FLAG_BE)
94 12960 return AVERROR(ENOSYS);
95
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 23738 if (desc->flags & ~(AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB | AV_PIX_FMT_FLAG_ALPHA))
96 5440 return AVERROR(ENOSYS);
97
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 18298 if (csp == AVCOL_SPC_UNSPECIFIED)
98
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 18252 csp = (desc->flags & AV_PIX_FMT_FLAG_RGB) ? AVCOL_SPC_RGB : AVCOL_SPC_SMPTE170M;
99
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 18298 if (!(desc->flags & AV_PIX_FMT_FLAG_RGB) && !(luma = av_csp_luma_coeffs_from_avcsp(csp)))
100 ✗ return AVERROR(EINVAL);
101
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 18298 if (range == AVCOL_RANGE_UNSPECIFIED)
102
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 36094 range = (format == AV_PIX_FMT_YUVJ420P || format == AV_PIX_FMT_YUVJ422P ||
103
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 17647 format == AV_PIX_FMT_YUVJ444P || format == AV_PIX_FMT_YUVJ411P ||
104
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 17327 format == AV_PIX_FMT_YUVJ440P || csp == AVCOL_SPC_RGB)
105
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 36094 ? AVCOL_RANGE_JPEG : AVCOL_RANGE_MPEG;
106
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 18298 if (range != AVCOL_RANGE_JPEG && range != AVCOL_RANGE_MPEG)
107 ✗ return AVERROR(EINVAL);
108
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 64910 for (i = 0; i < desc->nb_components; i++) {
109 int db;
110 50292 c = &desc->comp[i];
111 /* for now, only 8-16 bits formats */
112
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 50292 if (c->depth < 8 || c->depth > 16)
113 1600 return AVERROR(ENOSYS);
114
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 48692 if (c->plane >= MAX_PLANES)
115 ✗ return AVERROR(ENOSYS);
116 /* data must either be in the high or low bits, never middle */
117
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 48692 if (c->shift && ((c->shift + c->depth) & 0x7))
118 480 return AVERROR(ENOSYS);
119 /* mixed >8 and <=8 depth */
120 48212 db = (c->depth + 7) / 8;
121
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 48212 if (depthb && (depthb != db))
122 ✗ return AVERROR(ENOSYS);
123 48212 depthb = db;
124
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 48212 if (db * (c->offset + 1) > 16)
125 ✗ return AVERROR(ENOSYS);
126
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 48212 if (c->offset % db)
127 ✗ return AVERROR(ENOSYS);
128 /* strange interleaving */
129
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 48212 if (pixelstep[c->plane] != 0 &&
130
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 9055 pixelstep[c->plane] != c->step)
131 960 return AVERROR(ENOSYS);
132 47252 pixelstep[c->plane] = c->step;
133
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 47252 if (pixelstep[c->plane] >= 8)
134 640 return AVERROR(ENOSYS);
135 46612 nb_planes = FFMAX(nb_planes, c->plane + 1);
136 }
137 14618 memset(draw, 0, sizeof(*draw));
138 14618 draw->desc = desc;
139 14618 draw->format = format;
140 14618 draw->nb_planes = nb_planes;
141 14618 draw->range = range;
142 14618 draw->csp = csp;
143 14618 draw->flags = flags;
144
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 14618 if (luma)
145 10892 ff_fill_rgb2yuv_table(luma, draw->rgb2yuv);
146 14618 memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
147 14618 draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
148 14618 draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
149 14618 return 0;
150 }
151
152 36480 int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
153 {
154 36480 return ff_draw_init2(draw, format, AVCOL_SPC_UNSPECIFIED, AVCOL_RANGE_UNSPECIFIED, flags);
155 }
156
157 207167 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
158 {
159 unsigned i;
160 double yuvad[4];
161 double rgbad[4];
162 207167 const AVPixFmtDescriptor *desc = draw->desc;
163
164
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 207167 if (rgba != color->rgba)
165 207167 memcpy(color->rgba, rgba, sizeof(color->rgba));
166
167 207167 memset(color->comp, 0, sizeof(color->comp));
168
169
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170 828668 rgbad[i] = color->rgba[i] / 255.;
171
172
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 207167 if (draw->desc->flags & AV_PIX_FMT_FLAG_RGB)
173 53004 memcpy(yuvad, rgbad, sizeof(double) * 3);
174 else
175 154163 ff_matrix_mul_3x3_vec(yuvad, rgbad, draw->rgb2yuv);
176
177 207167 yuvad[3] = rgbad[3];
178
179
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 828668 for (int i = 0; i < 3; i++) {
180
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 621501 int chroma = (!(draw->desc->flags & AV_PIX_FMT_FLAG_RGB) && i > 0);
181
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 621501 if (draw->range == AVCOL_RANGE_MPEG) {
182
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 462426 yuvad[i] *= (chroma ? 224. : 219.) / 255.;
183
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 462426 yuvad[i] += (chroma ? 128. : 16.) / 255.;
184
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 159075 } else if (chroma) {
185 42 yuvad[i] += 0.5;
186 }
187 }
188
189 // Ensure we place the alpha appropriately for gray formats
190
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 207167 if (desc->nb_components <= 2)
191 10 yuvad[1] = yuvad[3];
192
193
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 854677 for (i = 0; i < desc->nb_components; i++) {
194 647510 unsigned val = yuvad[i] * ((1 << (draw->desc->comp[i].depth + draw->desc->comp[i].shift)) - 1) + 0.5;
195
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 647510 if (desc->comp[i].depth > 8)
196 59662 color->comp[desc->comp[i].plane].u16[desc->comp[i].offset / 2] = val;
197 else
198 587848 color->comp[desc->comp[i].plane].u8[desc->comp[i].offset] = val;
199 }
200 207167 }
201
202 602756 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
203 int plane, int x, int y)
204 {
205 602756 return data[plane] +
206 1205512 (y >> draw->vsub[plane]) * linesize[plane] +
207 602756 (x >> draw->hsub[plane]) * draw->pixelstep[plane];
208 }
209
210 37 void ff_copy_rectangle2(FFDrawContext *draw,
211 uint8_t *dst[], int dst_linesize[],
212 uint8_t *src[], int src_linesize[],
213 int dst_x, int dst_y, int src_x, int src_y,
214 int w, int h)
215 {
216 int plane, y, wp, hp;
217 uint8_t *p, *q;
218
219
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 148 for (plane = 0; plane < draw->nb_planes; plane++) {
220 111 p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
221 111 q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
222 111 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]) * draw->pixelstep[plane];
223 111 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
224
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 21423 for (y = 0; y < hp; y++) {
225 21312 memcpy(q, p, wp);
226 21312 p += src_linesize[plane];
227 21312 q += dst_linesize[plane];
228 }
229 }
230 37 }
231
232 208803 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
233 uint8_t *dst[], int dst_linesize[],
234 int dst_x, int dst_y, int w, int h)
235 {
236 int plane, x, y, wp, hp;
237 uint8_t *p0, *p;
238 208803 FFDrawColor color_tmp = *color;
239
240
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 730037 for (plane = 0; plane < draw->nb_planes; plane++) {
241 521234 p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
242 521234 wp = AV_CEIL_RSHIFT(w, draw->hsub[plane]);
243 521234 hp = AV_CEIL_RSHIFT(h, draw->vsub[plane]);
244
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 521234 if (!hp)
245 ✗ return;
246 521234 p = p0;
247
248 if (HAVE_BIGENDIAN && draw->desc->comp[0].depth > 8) {
249 for (x = 0; 2*x < draw->pixelstep[plane]; x++)
250 color_tmp.comp[plane].u16[x] = av_bswap16(color_tmp.comp[plane].u16[x]);
251 }
252
253 /* copy first line from color */
254
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 2520687 for (x = 0; x < wp; x++) {
255 1999453 memcpy(p, color_tmp.comp[plane].u8, draw->pixelstep[plane]);
256 1999453 p += draw->pixelstep[plane];
257 }
258 521234 wp *= draw->pixelstep[plane];
259 /* copy next lines from first line */
260 521234 p = p0 + dst_linesize[plane];
261
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 9445069 for (y = 1; y < hp; y++) {
262 8923835 memcpy(p, p0, wp);
263 8923835 p += dst_linesize[plane];
264 }
265 }
266 }
267
268 /**
269 * Clip interval [x; x+w[ within [0; wmax[.
270 * The resulting w may be negative if the final interval is empty.
271 * dx, if not null, return the difference between in and out value of x.
272 */
273 60940 static void clip_interval(int wmax, int *x, int *w, int *dx)
274 {
275
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 60940 if (dx)
276 59048 *dx = 0;
277
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 60940 if (*x < 0) {
278 ✗ if (dx)
279 ✗ *dx = -*x;
280 ✗ *w += *x;
281 ✗ *x = 0;
282 }
283
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 60940 if (*x + *w > wmax)
284 ✗ *w = wmax - *x;
285 60940 }
286
287 /**
288 * Decompose w pixels starting at x
289 * into start + (w starting at x) + end
290 * with x and w aligned on multiples of 1<<sub.
291 */
292 162600 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
293 {
294 162600 int mask = (1 << sub) - 1;
295
296 162600 *start = (-*x) & mask;
297 162600 *x += *start;
298 162600 *start = FFMIN(*start, *w);
299 162600 *w -= *start;
300 162600 *end = *w & mask;
301 162600 *w >>= sub;
302 162600 }
303
304 /* If alpha is in the [ 0 ; 0x1010101 ] range,
305 then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
306 and >> 24 gives a correct rounding. */
307 68580 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
308 int dx, int w, unsigned hsub, int left, int right)
309 {
310 68580 unsigned asrc = alpha * src;
311 68580 unsigned tau = 0x1010101 - alpha;
312 int x;
313
314
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 68580 if (left) {
315 ✗ unsigned suba = (left * alpha) >> hsub;
316 ✗ *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
317 ✗ dst += dx;
318 }
319
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 5797980 for (x = 0; x < w; x++) {
320 5729400 *dst = (*dst * tau + asrc) >> 24;
321 5729400 dst += dx;
322 }
323
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 68580 if (right) {
324 ✗ unsigned suba = (right * alpha) >> hsub;
325 ✗ *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
326 }
327 68580 }
328
329 11880 static void blend_line16(uint8_t *dst, unsigned src, unsigned alpha,
330 int dx, int w, unsigned hsub, int left, int right)
331 {
332 11880 unsigned asrc = alpha * src;
333 11880 unsigned tau = 0x10001 - alpha;
334 int x;
335
336
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 11880 if (left) {
337 ✗ unsigned suba = (left * alpha) >> hsub;
338 ✗ uint16_t value = AV_RL16(dst);
339 ✗ AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
340 ✗ dst += dx;
341 }
342
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 803880 for (x = 0; x < w; x++) {
343 792000 uint16_t value = AV_RL16(dst);
344 792000 AV_WL16(dst, (value * tau + asrc) >> 16);
345 792000 dst += dx;
346 }
347
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 11880 if (right) {
348 ✗ unsigned suba = (right * alpha) >> hsub;
349 ✗ uint16_t value = AV_RL16(dst);
350 ✗ AV_WL16(dst, (value * (0x10001 - suba) + src * suba) >> 16);
351 }
352 11880 }
353
354 946 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
355 uint8_t *dst[], int dst_linesize[],
356 int dst_w, int dst_h,
357 int x0, int y0, int w, int h)
358 {
359 unsigned alpha, nb_planes, nb_comp, plane, comp;
360 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
361 uint8_t *p0, *p;
362
363 1892 nb_comp = draw->desc->nb_components -
364
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 946 !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
365
366 /* TODO optimize if alpha = 0xFF */
367 946 clip_interval(dst_w, &x0, &w, NULL);
368 946 clip_interval(dst_h, &y0, &h, NULL);
369
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 946 if (w <= 0 || h <= 0 || !color->rgba[3])
370 ✗ return;
371
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 946 if (draw->desc->comp[0].depth <= 8) {
372 /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
373 836 alpha = 0x10203 * color->rgba[3] + 0x2;
374 } else {
375 /* 0x101 * alpha is in the [ 2 ; 0x1001] range */
376 110 alpha = 0x101 * color->rgba[3] + 0x2;
377 }
378
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 946 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
379 946 nb_planes += !nb_planes;
380
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 3482 for (plane = 0; plane < nb_planes; plane++) {
381 2536 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
382 2536 w_sub = w;
383 2536 h_sub = h;
384 2536 x_sub = x0;
385 2536 y_sub = y0;
386 2536 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
387 2536 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
388
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 10144 for (comp = 0; comp < nb_comp; comp++) {
389 7608 const int depth = draw->desc->comp[comp].depth;
390 7608 const int offset = draw->desc->comp[comp].offset;
391 7608 const int index = offset / ((depth + 7) / 8);
392
393
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 7608 if (draw->desc->comp[comp].plane != plane)
394 4770 continue;
395 2838 p = p0 + offset;
396
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 2838 if (top) {
397 ✗ if (depth <= 8) {
398 ✗ blend_line(p, color->comp[plane].u8[index], alpha >> 1,
399 draw->pixelstep[plane], w_sub,
400 ✗ draw->hsub[plane], left, right);
401 } else {
402 ✗ blend_line16(p, color->comp[plane].u16[index], alpha >> 1,
403 draw->pixelstep[plane], w_sub,
404 ✗ draw->hsub[plane], left, right);
405 }
406 ✗ p += dst_linesize[plane];
407 }
408
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 2838 if (depth <= 8) {
409
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 71088 for (y = 0; y < h_sub; y++) {
410 68580 blend_line(p, color->comp[plane].u8[index], alpha,
411 draw->pixelstep[plane], w_sub,
412 68580 draw->hsub[plane], left, right);
413 68580 p += dst_linesize[plane];
414 }
415 } else {
416
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 12210 for (y = 0; y < h_sub; y++) {
417 11880 blend_line16(p, color->comp[plane].u16[index], alpha,
418 draw->pixelstep[plane], w_sub,
419 11880 draw->hsub[plane], left, right);
420 11880 p += dst_linesize[plane];
421 }
422 }
423
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 2838 if (bottom) {
424 ✗ if (depth <= 8) {
425 ✗ blend_line(p, color->comp[plane].u8[index], alpha >> 1,
426 draw->pixelstep[plane], w_sub,
427 ✗ draw->hsub[plane], left, right);
428 } else {
429 ✗ blend_line16(p, color->comp[plane].u16[index], alpha >> 1,
430 draw->pixelstep[plane], w_sub,
431 ✗ draw->hsub[plane], left, right);
432 }
433 }
434 }
435 }
436 }
437
438 1070080 static void blend_pixel16(uint8_t *dst, unsigned src, unsigned alpha,
439 const uint8_t *mask, int mask_linesize, int l2depth,
440 unsigned w, unsigned h, unsigned shift, unsigned xm0)
441 {
442 1070080 unsigned xm, x, y, t = 0;
443 1070080 unsigned xmshf = 3 - l2depth;
444 1070080 unsigned xmmod = 7 >> l2depth;
445 1070080 unsigned mbits = (1 << (1 << l2depth)) - 1;
446 1070080 unsigned mmult = 255 / mbits;
447 1070080 uint16_t value = AV_RL16(dst);
448
449
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 2140160 for (y = 0; y < h; y++) {
450 1070080 xm = xm0;
451
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 2675200 for (x = 0; x < w; x++) {
452 1605120 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
453 1605120 * mmult;
454 1605120 xm++;
455 }
456 1070080 mask += mask_linesize;
457 }
458 1070080 alpha = (t >> shift) * alpha;
459 1070080 AV_WL16(dst, ((0x10001 - alpha) * value + alpha * src) >> 16);
460 1070080 }
461
462 7902880 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
463 const uint8_t *mask, int mask_linesize, int l2depth,
464 unsigned w, unsigned h, unsigned shift, unsigned xm0)
465 {
466 7902880 unsigned xm, x, y, t = 0;
467 7902880 unsigned xmshf = 3 - l2depth;
468 7902880 unsigned xmmod = 7 >> l2depth;
469 7902880 unsigned mbits = (1 << (1 << l2depth)) - 1;
470 7902880 unsigned mmult = 255 / mbits;
471
472
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 17268896 for (y = 0; y < h; y++) {
473 9366016 xm = xm0;
474
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 21716992 for (x = 0; x < w; x++) {
475 12350976 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
476 12350976 * mmult;
477 12350976 xm++;
478 }
479 9366016 mask += mask_linesize;
480 }
481 7902880 alpha = (t >> shift) * alpha;
482 7902880 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
483 7902880 }
484
485 163680 static void blend_line_hv16(uint8_t *dst, int dst_delta,
486 unsigned src, unsigned alpha,
487 const uint8_t *mask, int mask_linesize, int l2depth, int w,
488 unsigned hsub, unsigned vsub,
489 int xm, int left, int right, int hband)
490 {
491 int x;
492
493
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 163680 if (left) {
494 ✗ blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
495 left, hband, hsub + vsub, xm);
496 ✗ dst += dst_delta;
497 ✗ xm += left;
498 }
499
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 1233760 for (x = 0; x < w; x++) {
500 1070080 blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
501 1070080 1 << hsub, hband, hsub + vsub, xm);
502 1070080 dst += dst_delta;
503 1070080 xm += 1 << hsub;
504 }
505
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 163680 if (right)
506 ✗ blend_pixel16(dst, src, alpha, mask, mask_linesize, l2depth,
507 right, hband, hsub + vsub, xm);
508 163680 }
509
510 954804 static void blend_line_hv(uint8_t *dst, int dst_delta,
511 unsigned src, unsigned alpha,
512 const uint8_t *mask, int mask_linesize, int l2depth, int w,
513 unsigned hsub, unsigned vsub,
514 int xm, int left, int right, int hband)
515 {
516 int x;
517
518
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 954804 if (left) {
519 ✗ blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
520 left, hband, hsub + vsub, xm);
521 ✗ dst += dst_delta;
522 ✗ xm += left;
523 }
524
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 8857684 for (x = 0; x < w; x++) {
525 7902880 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
526 7902880 1 << hsub, hband, hsub + vsub, xm);
527 7902880 dst += dst_delta;
528 7902880 xm += 1 << hsub;
529 }
530
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 954804 if (right)
531 ✗ blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
532 right, hband, hsub + vsub, xm);
533 954804 }
534
535 29524 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
536 uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
537 const uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
538 int l2depth, unsigned endianness, int x0, int y0)
539 {
540 unsigned alpha, nb_planes, nb_comp, plane, comp;
541 int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
542 uint8_t *p0, *p;
543 const uint8_t *m;
544
545 59048 nb_comp = draw->desc->nb_components -
546
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 29524 !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
547
548 29524 clip_interval(dst_w, &x0, &mask_w, &xm0);
549 29524 clip_interval(dst_h, &y0, &mask_h, &ym0);
550 29524 mask += ym0 * mask_linesize;
551
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 29524 if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
552 ✗ return;
553
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 29524 if (draw->desc->comp[0].depth <= 8) {
554 /* alpha is in the [ 0 ; 0x10203 ] range,
555 alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
556 26114 alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
557 } else {
558 3410 alpha = (0x101 * color->rgba[3] + 0x2) >> 8;
559 }
560
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 29524 nb_planes = draw->nb_planes - !!(draw->desc->flags & AV_PIX_FMT_FLAG_ALPHA && !(draw->flags & FF_DRAW_PROCESS_ALPHA));
561 29524 nb_planes += !nb_planes;
562
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 108288 for (plane = 0; plane < nb_planes; plane++) {
563 78764 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
564 78764 w_sub = mask_w;
565 78764 h_sub = mask_h;
566 78764 x_sub = x0;
567 78764 y_sub = y0;
568 78764 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
569 78764 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
570
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 315056 for (comp = 0; comp < nb_comp; comp++) {
571 236292 const int depth = draw->desc->comp[comp].depth;
572 236292 const int offset = draw->desc->comp[comp].offset;
573 236292 const int index = offset / ((depth + 7) / 8);
574
575
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 236292 if (draw->desc->comp[comp].plane != plane)
576 147720 continue;
577 88572 p = p0 + offset;
578 88572 m = mask;
579
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 88572 if (top) {
580
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 180 if (depth <= 8) {
581 180 blend_line_hv(p, draw->pixelstep[plane],
582 180 color->comp[plane].u8[index], alpha,
583 m, mask_linesize, l2depth, w_sub,
584 180 draw->hsub[plane], draw->vsub[plane],
585 xm0, left, right, top);
586 } else {
587 ✗ blend_line_hv16(p, draw->pixelstep[plane],
588 ✗ color->comp[plane].u16[index], alpha,
589 m, mask_linesize, l2depth, w_sub,
590 ✗ draw->hsub[plane], draw->vsub[plane],
591 xm0, left, right, top);
592 }
593 180 p += dst_linesize[plane];
594 180 m += top * mask_linesize;
595 }
596
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 88572 if (depth <= 8) {
597
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 1032786 for (y = 0; y < h_sub; y++) {
598 954444 blend_line_hv(p, draw->pixelstep[plane],
599 954444 color->comp[plane].u8[index], alpha,
600 m, mask_linesize, l2depth, w_sub,
601 954444 draw->hsub[plane], draw->vsub[plane],
602 954444 xm0, left, right, 1 << draw->vsub[plane]);
603 954444 p += dst_linesize[plane];
604 954444 m += mask_linesize << draw->vsub[plane];
605 }
606 } else {
607
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 173910 for (y = 0; y < h_sub; y++) {
608 163680 blend_line_hv16(p, draw->pixelstep[plane],
609 163680 color->comp[plane].u16[index], alpha,
610 m, mask_linesize, l2depth, w_sub,
611 163680 draw->hsub[plane], draw->vsub[plane],
612 163680 xm0, left, right, 1 << draw->vsub[plane]);
613 163680 p += dst_linesize[plane];
614 163680 m += mask_linesize << draw->vsub[plane];
615 }
616 }
617
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 88572 if (bottom) {
618
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 180 if (depth <= 8) {
619 180 blend_line_hv(p, draw->pixelstep[plane],
620 180 color->comp[plane].u8[index], alpha,
621 m, mask_linesize, l2depth, w_sub,
622 180 draw->hsub[plane], draw->vsub[plane],
623 xm0, left, right, bottom);
624 } else {
625 ✗ blend_line_hv16(p, draw->pixelstep[plane],
626 ✗ color->comp[plane].u16[index], alpha,
627 m, mask_linesize, l2depth, w_sub,
628 ✗ draw->hsub[plane], draw->vsub[plane],
629 xm0, left, right, bottom);
630 }
631 }
632 }
633 }
634 }
635
636 227412 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
637 int value)
638 {
639
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 227412 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
640
641
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 227412 if (!shift)
642 103154 return value;
643
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 124258 if (round_dir >= 0)
644
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 104061 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
645 124258 return (value >> shift) << shift;
646 }
647
648 160 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
649 {
650 enum AVPixelFormat i;
651 FFDrawContext draw;
652 160 AVFilterFormats *fmts = NULL;
653 int ret;
654
655
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 36640 for (i = 0; av_pix_fmt_desc_get(i); i++)
656
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 50880 if (ff_draw_init(&draw, i, flags) >= 0 &&
657 14400 (ret = ff_add_format(&fmts, i)) < 0)
658 ✗ return NULL;
659 160 return fmts;
660 }
661