h264_metadata: Add option to delete filler data
[libav.git] / libavfilter / drawutils.c
1 /*
2 * This file is part of Libav.
3 *
4 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include <string.h>
20
21 #include "libavutil/avutil.h"
22 #include "libavutil/colorspace.h"
23 #include "libavutil/mem.h"
24 #include "libavutil/pixdesc.h"
25 #include "drawutils.h"
26
27 enum { RED = 0, GREEN, BLUE, ALPHA };
28
29 int ff_fill_line_with_color(uint8_t *line[4], int pixel_step[4], int w, uint8_t dst_color[4],
30 enum AVPixelFormat pix_fmt, uint8_t rgba_color[4],
31 int *is_packed_rgba, uint8_t rgba_map_ptr[4])
32 {
33 uint8_t rgba_map[4] = {0};
34 int i;
35 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(pix_fmt);
36 int hsub = pix_desc->log2_chroma_w;
37
38 *is_packed_rgba = 1;
39 switch (pix_fmt) {
40 case AV_PIX_FMT_ARGB: rgba_map[ALPHA] = 0; rgba_map[RED ] = 1; rgba_map[GREEN] = 2; rgba_map[BLUE ] = 3; break;
41 case AV_PIX_FMT_ABGR: rgba_map[ALPHA] = 0; rgba_map[BLUE ] = 1; rgba_map[GREEN] = 2; rgba_map[RED ] = 3; break;
42 case AV_PIX_FMT_RGBA:
43 case AV_PIX_FMT_RGB24: rgba_map[RED ] = 0; rgba_map[GREEN] = 1; rgba_map[BLUE ] = 2; rgba_map[ALPHA] = 3; break;
44 case AV_PIX_FMT_BGRA:
45 case AV_PIX_FMT_BGR24: rgba_map[BLUE ] = 0; rgba_map[GREEN] = 1; rgba_map[RED ] = 2; rgba_map[ALPHA] = 3; break;
46 default:
47 *is_packed_rgba = 0;
48 }
49
50 if (*is_packed_rgba) {
51 pixel_step[0] = (av_get_bits_per_pixel(pix_desc))>>3;
52 for (i = 0; i < 4; i++)
53 dst_color[rgba_map[i]] = rgba_color[i];
54
55 line[0] = av_malloc(w * pixel_step[0]);
56 for (i = 0; i < w; i++)
57 memcpy(line[0] + i * pixel_step[0], dst_color, pixel_step[0]);
58 if (rgba_map_ptr)
59 memcpy(rgba_map_ptr, rgba_map, sizeof(rgba_map[0]) * 4);
60 } else {
61 int plane;
62
63 dst_color[0] = RGB_TO_Y_CCIR(rgba_color[0], rgba_color[1], rgba_color[2]);
64 dst_color[1] = RGB_TO_U_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
65 dst_color[2] = RGB_TO_V_CCIR(rgba_color[0], rgba_color[1], rgba_color[2], 0);
66 dst_color[3] = rgba_color[3];
67
68 for (plane = 0; plane < 4; plane++) {
69 int line_size;
70 int hsub1 = (plane == 1 || plane == 2) ? hsub : 0;
71
72 pixel_step[plane] = 1;
73 line_size = (w >> hsub1) * pixel_step[plane];
74 line[plane] = av_malloc(line_size);
75 memset(line[plane], dst_color[plane], line_size);
76 }
77 }
78
79 return 0;
80 }
81
82 void ff_draw_rectangle(uint8_t *dst[4], int dst_linesize[4],
83 uint8_t *src[4], int pixelstep[4],
84 int hsub, int vsub, int x, int y, int w, int h)
85 {
86 int i, plane;
87 uint8_t *p;
88
89 for (plane = 0; plane < 4 && dst[plane]; plane++) {
90 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
91 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
92
93 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
94 for (i = 0; i < (h >> vsub1); i++) {
95 memcpy(p + (x >> hsub1) * pixelstep[plane],
96 src[plane], (w >> hsub1) * pixelstep[plane]);
97 p += dst_linesize[plane];
98 }
99 }
100 }
101
102 void ff_copy_rectangle(uint8_t *dst[4], int dst_linesize[4],
103 uint8_t *src[4], int src_linesize[4], int pixelstep[4],
104 int hsub, int vsub, int x, int y, int y2, int w, int h)
105 {
106 int i, plane;
107 uint8_t *p;
108
109 for (plane = 0; plane < 4 && dst[plane]; plane++) {
110 int hsub1 = plane == 1 || plane == 2 ? hsub : 0;
111 int vsub1 = plane == 1 || plane == 2 ? vsub : 0;
112
113 p = dst[plane] + (y >> vsub1) * dst_linesize[plane];
114 for (i = 0; i < (h >> vsub1); i++) {
115 memcpy(p + (x >> hsub1) * pixelstep[plane],
116 src[plane] + src_linesize[plane]*(i+(y2>>vsub1)), (w >> hsub1) * pixelstep[plane]);
117 p += dst_linesize[plane];
118 }
119 }
120 }