2 * Copyright 2011 Stefano Sabatini <stefano.sabatini-lala poste it>
3 * Copyright 2012 Nicolas George <nicolas.george normalesup org>
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/avutil.h"
23 #include "libavutil/colorspace.h"
24 #include "libavutil/pixdesc.h"
25 #include "drawutils.h"
28 enum { RED = 0, GREEN, BLUE, ALPHA };
30 int ff_fill_rgba_map(uint8_t *rgba_map, enum PixelFormat pix_fmt)
34 case PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
36 case PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
39 case PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
42 case PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
43 default: /* unsupported */
44 return AVERROR(EINVAL);
49 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
50 enum PixelFormat pix_fmt, uint8_t rgba_color[4],
51 int *is_packed_rgba, uint8_t rgba_map_ptr[4])
53 uint8_t rgba_map[4] = {0};
55 const AVPixFmtDescriptor *pix_desc = &av_pix_fmt_descriptors[pix_fmt];
56 int hsub = pix_desc->log2_chroma_w;
58 *is_packed_rgba = ff_fill_rgba_map(rgba_map, pix_fmt) >= 0;
60 if (*is_packed_rgba) {
61 pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
62 for (i = 0; i < 4; i++)
63 dst_color[rgba_map[i]] = rgba_color[i];
65 line[0] = av_malloc(w * pixel_step[0]);
66 for (i = 0; i < w; i++)
67 memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
69 memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
73 dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
74 dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
75 dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
76 dst_color[3] = rgba_color[3];
78 for (plane = 0; plane < 4; plane++) {
80 int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
82 pixel_step[plane] = 1;
83 line_size = (w >> hsub1) * pixel_step[plane];
84 line[plane] = av_malloc(line_size);
85 memset(line[plane], dst_color[plane], line_size);
92 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
93 uint8_t *src[4], int pixelstep[4],
94 int hsub, int vsub, int x, int y, int w, int h)
99 for (plane = 0; plane < 4 && dst[plane]; plane++) {
100 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
101 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
103 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
104 for (i = 0; i < (h >> vsub1); i++) {
105 memcpy(p + (x >> hsub1) * pixelstep[plane],
106 src[plane], (w >> hsub1) * pixelstep[plane]);
107 p += dst_linesize[plane];
112 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
113 uint8_t *src[4], int src_linesize[4], int pixelstep[4],
114 int hsub, int vsub, int x, int y, int y2, int w, int h)
119 for (plane = 0; plane < 4 && dst[plane]; plane++) {
120 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
121 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
123 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
124 for (i = 0; i < (h >> vsub1); i++) {
125 memcpy(p + (x >> hsub1) * pixelstep[plane],
126 src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * pixelstep[plane]);
127 p += dst_linesize[plane];
132 int ff_draw_init(FFDrawContext *draw, enum PixelFormat format, unsigned flags)
134 const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[format];
135 const AVComponentDescriptor *c;
136 unsigned i, nb_planes = 0;
137 int pixelstep[MAX_PLANES] = { 0 };
140 return AVERROR(EINVAL);
141 if (desc->flags & ~(PIX_FMT_PLANAR | PIX_FMT_RGB | PIX_FMT_PSEUDOPAL))
142 return AVERROR(ENOSYS);
143 for (i = 0; i < desc->nb_components; i++) {
145 /* for now, only 8-bits formats */
146 if (c->depth_minus1 != 8 - 1)
147 return AVERROR(ENOSYS);
148 if (c->plane >= MAX_PLANES)
149 return AVERROR(ENOSYS);
150 /* strange interleaving */
151 if (pixelstep[c->plane] != 0 &&
152 pixelstep[c->plane] != c->step_minus1 + 1)
153 return AVERROR(ENOSYS);
154 pixelstep[c->plane] = c->step_minus1 + 1;
155 if (pixelstep[c->plane] >= 8)
156 return AVERROR(ENOSYS);
157 nb_planes = FFMAX(nb_planes, c->plane + 1);
159 if ((desc->log2_chroma_w || desc->log2_chroma_h) && nb_planes < 3)
160 return AVERROR(ENOSYS); /* exclude NV12 and NV21 */
161 memset(draw, 0, sizeof(*draw));
163 draw->format = format;
164 draw->nb_planes = nb_planes;
165 memcpy(draw->pixelstep, pixelstep, sizeof(draw->pixelstep));
166 if (nb_planes >= 3 && !(desc->flags & PIX_FMT_RGB)) {
167 draw->hsub[1] = draw->hsub[2] = draw->hsub_max = desc->log2_chroma_w;
168 draw->vsub[1] = draw->vsub[2] = draw->vsub_max = desc->log2_chroma_h;
170 for (i = 0; i < ((desc->nb_components - 1) | 1); i++)
171 draw->comp_mask[desc->comp[i].plane] |=
172 1 << (desc->comp[i].offset_plus1 - 1);
176 void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
181 if (rgba != color->rgba)
182 memcpy(color->rgba, rgba, sizeof(color->rgba));
183 if ((draw->desc->flags & PIX_FMT_RGB) && draw->nb_planes == 1 &&
184 ff_fill_rgba_map(rgba_map, draw->format) >= 0) {
185 for (i = 0; i < 4; i++)
186 color->comp[0].u8[rgba_map[i]] = rgba[i];
187 } else if (draw->nb_planes == 3 || draw->nb_planes == 4) {
189 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
190 color->comp[1].u8[0] = RGB_TO_U_CCIR(rgba[0], rgba[1], rgba[2], 0);
191 color->comp[2].u8[0] = RGB_TO_V_CCIR(rgba[0], rgba[1], rgba[2], 0);
192 color->comp[3].u8[0] = rgba[3];
193 } else if (draw->format == PIX_FMT_GRAY8 || draw->format == PIX_FMT_GRAY8A) {
194 color->comp[0].u8[0] = RGB_TO_Y_CCIR(rgba[0], rgba[1], rgba[2]);
195 color->comp[1].u8[0] = rgba[3];
197 av_log(NULL, AV_LOG_WARNING,
198 "Color conversion not implemented for %s\n", draw->desc->name);
199 memset(color, 128, sizeof(*color));
203 static uint8_t *pointer_at(FFDrawContext *draw, uint8_t *data[], int linesize[],
204 int plane, int x, int y)
207 (y >> draw->vsub[plane]) * linesize[plane] +
208 (x >> draw->hsub[plane]) * draw->pixelstep[plane];
211 void ff_copy_rectangle2(FFDrawContext *draw,
212 uint8_t *dst[], int dst_linesize[],
213 uint8_t *src[], int src_linesize[],
214 int dst_x, int dst_y, int src_x, int src_y,
217 int plane, y, wp, hp;
220 for (plane = 0; plane < draw->nb_planes; plane++) {
221 p = pointer_at(draw, src, src_linesize, plane, src_x, src_y);
222 q = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
223 wp = (w >> draw->hsub[plane]) * draw->pixelstep[plane];
224 hp = (h >> draw->vsub[plane]);
225 for (y = 0; y < hp; y++) {
227 p += src_linesize[plane];
228 q += dst_linesize[plane];
233 void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color,
234 uint8_t *dst[], int dst_linesize[],
235 int dst_x, int dst_y, int w, int h)
237 int plane, x, y, wp, hp;
240 for (plane = 0; plane < draw->nb_planes; plane++) {
241 p0 = pointer_at(draw, dst, dst_linesize, plane, dst_x, dst_y);
242 wp = (w >> draw->hsub[plane]);
243 hp = (h >> draw->vsub[plane]);
247 /* copy first line from color */
248 for (x = 0; x < wp; x++) {
249 memcpy(p, color->comp[plane].u8, draw->pixelstep[plane]);
250 p += draw->pixelstep[plane];
252 wp *= draw->pixelstep[plane];
253 /* copy next lines from first line */
254 p = p0 + dst_linesize[plane];
255 for (y = 1; y < hp; y++) {
257 p += dst_linesize[plane];
263 * Clip interval [x; x+w[ within [0; wmax[.
264 * The resulting w may be negative if the final interval is empty.
265 * dx, if not null, return the difference between in and out value of x.
267 static void clip_interval(int wmax, int *x, int *w, int *dx)
282 * Decompose w pixels starting at x
283 * into start + (w starting at x) + end
284 * with x and w aligned on multiples of 1<<sub.
286 static void subsampling_bounds(int sub, int *x, int *w, int *start, int *end)
288 int mask = (1 << sub) - 1;
290 *start = (-*x) & mask;
292 *start = FFMIN(*start, *w);
298 static int component_used(FFDrawContext *draw, int plane, int comp)
300 return (draw->comp_mask[plane] >> comp) & 1;
303 /* If alpha is in the [ 0 ; 0x1010101 ] range,
304 then alpha * value is in the [ 0 ; 0xFFFFFFFF ] range,
305 and >> 24 gives a correct rounding. */
306 static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
307 int dx, int w, unsigned hsub, int left, int right)
309 unsigned asrc = alpha * src;
310 unsigned tau = 0x1010101 - alpha;
315 unsigned suba = (left * alpha) >> hsub;
316 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
319 for (x = 0; x < w; x++) {
320 *dst = (*dst * tau + asrc) >> 24;
324 unsigned suba = (right * alpha) >> hsub;
325 *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
329 void ff_blend_rectangle(FFDrawContext *draw, FFDrawColor *color,
330 uint8_t *dst[], int dst_linesize[],
331 int dst_w, int dst_h,
332 int x0, int y0, int w, int h)
334 unsigned alpha, nb_planes, nb_comp, plane, comp;
335 int w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
338 /* TODO optimize if alpha = 0xFF */
339 clip_interval(dst_w, &x0, &w, NULL);
340 clip_interval(dst_h, &y0, &h, NULL);
341 if (w <= 0 || h <= 0 || !color->rgba[3])
343 /* 0x10203 * alpha + 2 is in the [ 2 ; 0x1010101 - 2 ] range */
344 alpha = 0x10203 * color->rgba[3] + 0x2;
345 nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
346 for (plane = 0; plane < nb_planes; plane++) {
347 nb_comp = draw->pixelstep[plane];
348 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
353 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
354 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
355 for (comp = 0; comp < nb_comp; comp++) {
356 if (!component_used(draw, plane, comp))
360 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
361 draw->pixelstep[plane], w_sub,
362 draw->hsub[plane], left, right);
363 p += dst_linesize[plane];
365 for (y = 0; y < h_sub; y++) {
366 blend_line(p, color->comp[plane].u8[comp], alpha,
367 draw->pixelstep[plane], w_sub,
368 draw->hsub[plane], left, right);
369 p += dst_linesize[plane];
372 blend_line(p, color->comp[plane].u8[comp], alpha >> 1,
373 draw->pixelstep[plane], w_sub,
374 draw->hsub[plane], left, right);
379 static void blend_pixel(uint8_t *dst, unsigned src, unsigned alpha,
380 uint8_t *mask, int mask_linesize, int l2depth,
381 unsigned w, unsigned h, unsigned shift, unsigned xm0)
383 unsigned xm, x, y, t = 0;
384 unsigned xmshf = 3 - l2depth;
385 unsigned xmmod = 7 >> l2depth;
386 unsigned mbits = (1 << (1 << l2depth)) - 1;
387 unsigned mmult = 255 / mbits;
389 for (y = 0; y < h; y++) {
391 for (x = 0; x < w; x++) {
392 t += ((mask[xm >> xmshf] >> ((~xm & xmmod) << l2depth)) & mbits)
396 mask += mask_linesize;
398 alpha = (t >> shift) * alpha;
399 *dst = ((0x1010101 - alpha) * *dst + alpha * src) >> 24;
402 static void blend_line_hv(uint8_t *dst, int dst_delta,
403 unsigned src, unsigned alpha,
404 uint8_t *mask, int mask_linesize, int l2depth, int w,
405 unsigned hsub, unsigned vsub,
406 int xm, int left, int right, int hband)
411 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
412 left, hband, hsub + vsub, xm);
416 for (x = 0; x < w; x++) {
417 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
418 1 << hsub, hband, hsub + vsub, xm);
423 blend_pixel(dst, src, alpha, mask, mask_linesize, l2depth,
424 right, hband, hsub + vsub, xm);
427 void ff_blend_mask(FFDrawContext *draw, FFDrawColor *color,
428 uint8_t *dst[], int dst_linesize[], int dst_w, int dst_h,
429 uint8_t *mask, int mask_linesize, int mask_w, int mask_h,
430 int l2depth, unsigned endianness, int x0, int y0)
432 unsigned alpha, nb_planes, nb_comp, plane, comp;
433 int xm0, ym0, w_sub, h_sub, x_sub, y_sub, left, right, top, bottom, y;
436 clip_interval(dst_w, &x0, &mask_w, &xm0);
437 clip_interval(dst_h, &y0, &mask_h, &ym0);
438 mask += ym0 * mask_linesize;
439 if (mask_w <= 0 || mask_h <= 0 || !color->rgba[3])
441 /* alpha is in the [ 0 ; 0x10203 ] range,
442 alpha * mask is in the [ 0 ; 0x1010101 - 4 ] range */
443 alpha = (0x10307 * color->rgba[3] + 0x3) >> 8;
444 nb_planes = (draw->nb_planes - 1) | 1; /* eliminate alpha */
445 for (plane = 0; plane < nb_planes; plane++) {
446 nb_comp = draw->pixelstep[plane];
447 p0 = pointer_at(draw, dst, dst_linesize, plane, x0, y0);
452 subsampling_bounds(draw->hsub[plane], &x_sub, &w_sub, &left, &right);
453 subsampling_bounds(draw->vsub[plane], &y_sub, &h_sub, &top, &bottom);
454 for (comp = 0; comp < nb_comp; comp++) {
455 if (!component_used(draw, plane, comp))
460 blend_line_hv(p, draw->pixelstep[plane],
461 color->comp[plane].u8[comp], alpha,
462 m, mask_linesize, l2depth, w_sub,
463 draw->hsub[plane], draw->vsub[plane],
464 xm0, left, right, top);
465 p += dst_linesize[plane];
466 m += top * mask_linesize;
468 for (y = 0; y < h_sub; y++) {
469 blend_line_hv(p, draw->pixelstep[plane],
470 color->comp[plane].u8[comp], alpha,
471 m, mask_linesize, l2depth, w_sub,
472 draw->hsub[plane], draw->vsub[plane],
473 xm0, left, right, 1 << draw->vsub[plane]);
474 p += dst_linesize[plane];
475 m += mask_linesize << draw->vsub[plane];
478 blend_line_hv(p, draw->pixelstep[plane],
479 color->comp[plane].u8[comp], alpha,
480 m, mask_linesize, l2depth, w_sub,
481 draw->hsub[plane], draw->vsub[plane],
482 xm0, left, right, bottom);
487 int ff_draw_round_to_sub(FFDrawContext *draw, int sub_dir, int round_dir,
490 unsigned shift = sub_dir ? draw->vsub_max : draw->hsub_max;
495 value += round_dir ? (1 << shift) - 1 : 1 << (shift - 1);
496 return (value >> shift) << shift;
499 AVFilterFormats *ff_draw_supported_pixel_formats(unsigned flags)
501 enum PixelFormat i, pix_fmts[PIX_FMT_NB + 1];
505 for (i = 0; i < PIX_FMT_NB; i++)
506 if (ff_draw_init(&draw, i, flags) >= 0)
508 pix_fmts[n++] = PIX_FMT_NONE;
509 return ff_make_format_list(pix_fmts);
519 const AVPixFmtDescriptor *desc;
524 for (f = 0; f < PIX_FMT_NB; f++) {
525 desc = &av_pix_fmt_descriptors[f];
528 printf("Testing %s...%*s", desc->name,
529 (int)(16 - strlen(desc->name)), "");
530 r = ff_draw_init(&draw, f, 0);
533 av_strerror(r, buf, sizeof(buf));
534 printf("no: %s\n", buf);
537 ff_draw_color(&draw, &color, (uint8_t[]) { 1, 0, 0, 1 });
538 for (i = 0; i < sizeof(color); i++)
539 if (((uint8_t *)&color)[i] != 128)
541 if (i == sizeof(color)) {
542 printf("fallback color\n");