| 1 | /*
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| 2 | * drawtext.c: print text over the screen
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| 3 | ******************************************************************************
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| 4 | * Options:
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| 5 | * -f <filename> font filename (MANDATORY!!!)
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| 6 | * -s <pixel_size> font size in pixels [default 16]
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| 7 | * -b print background
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| 8 | * -o outline glyphs (use the bg color)
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| 9 | * -x <pos> x position ( >= 0) [default 0]
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| 10 | * -y <pos> y position ( >= 0) [default 0]
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| 11 | * -t <text> text to print (will be passed to strftime())
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| 12 | * MANDATORY: will be used even when -T is used.
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| 13 | * in this case, -t will be used if some error
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| 14 | * occurs
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| 15 | * -T <filename> file with the text (re-read every frame)
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| 16 | * -c <#RRGGBB> foreground color ('internet' way) [default #ffffff]
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| 17 | * -C <#RRGGBB> background color ('internet' way) [default #000000]
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| 18 | *
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| 19 | ******************************************************************************
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| 20 | * Features:
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| 21 | * - True Type, Type1 and others via FreeType2 library
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| 22 | * - Font kerning (better output)
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| 23 | * - Line Wrap (if the text doesn't fit, the next char go to the next line)
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| 24 | * - Background box
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| 25 | * - Outline
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| 26 | ******************************************************************************
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| 27 | * Author: Gustavo Sverzut Barbieri <[email protected]>
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| 28 | *
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| 29 | * This library is free software; you can redistribute it and/or
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| 30 | * modify it under the terms of the GNU Lesser General Public
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| 31 | * License as published by the Free Software Foundation; either
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| 32 | * version 2 of the License, or (at your option) any later version.
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| 33 | *
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| 34 | * This library is distributed in the hope that it will be useful,
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| 35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 37 | * Lesser General Public License for more details.
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| 38 | *
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| 39 | * You should have received a copy of the GNU Lesser General Public
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| 40 | * License along with this library; if not, write to the Free Software
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| 41 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 42 | */
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| 43 |
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| 44 | #define MAXSIZE_TEXT 1024
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| 45 |
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| 46 | #include "framehook.h"
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| 47 |
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| 48 | #include <stdio.h>
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| 49 | #include <stdlib.h>
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| 50 | #include <fcntl.h>
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| 51 | #include <stdarg.h>
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| 52 | #include <string.h>
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| 53 | #include <unistd.h>
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| 54 | #undef time
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| 55 | #include <sys/time.h>
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| 56 | #include <time.h>
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| 57 |
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| 58 | #include <ft2build.h>
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| 59 | #include FT_FREETYPE_H
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| 60 | #include FT_GLYPH_H
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| 61 |
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| 62 | #define RGB_TO_YUV(rgb_color, yuv_color) { \
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| 63 | yuv_color[0] = ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16; \
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| 64 | yuv_color[2] = ( 0.439 * rgb_color[0]) - (0.368 * rgb_color[1]) - (0.071 * rgb_color[2]) + 128; \
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| 65 | yuv_color[1] = (-0.148 * rgb_color[0]) - (0.291 * rgb_color[1]) + (0.439 * rgb_color[2]) + 128; \
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| 66 | }
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| 67 |
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| 68 | #define COPY_3(dst,src) { \
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| 69 | dst[0]=src[0]; \
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| 70 | dst[1]=src[1]; \
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| 71 | dst[2]=src[2]; \
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| 72 | }
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| 73 |
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| 74 |
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| 75 |
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| 76 | #define SET_PIXEL(picture, yuv_color, x, y) { \
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| 77 | picture->data[0][ (x) + (y)*picture->linesize[0] ] = yuv_color[0]; \
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| 78 | picture->data[1][ ((x/2) + (y/2)*picture->linesize[1]) ] = yuv_color[1]; \
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| 79 | picture->data[2][ ((x/2) + (y/2)*picture->linesize[2]) ] = yuv_color[2]; \
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| 80 | }
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| 81 |
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| 82 | #define GET_PIXEL(picture, yuv_color, x, y) { \
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| 83 | yuv_color[0] = picture->data[0][ (x) + (y)*picture->linesize[0] ]; \
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| 84 | yuv_color[1] = picture->data[1][ (x/2) + (y/2)*picture->linesize[1] ]; \
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| 85 | yuv_color[2] = picture->data[2][ (x/2) + (y/2)*picture->linesize[2] ]; \
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| 86 | }
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| 87 |
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| 88 |
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| 89 | typedef struct {
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| 90 | unsigned char *text;
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| 91 | unsigned char *file;
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| 92 | unsigned int x;
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| 93 | unsigned int y;
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| 94 | int bg;
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| 95 | int outline;
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| 96 | unsigned char bgcolor[3]; /* YUV */
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| 97 | unsigned char fgcolor[3]; /* YUV */
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| 98 | FT_Library library;
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| 99 | FT_Face face;
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| 100 | FT_Glyph glyphs[ 255 ];
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| 101 | FT_Bitmap bitmaps[ 255 ];
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| 102 | int advance[ 255 ];
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| 103 | int bitmap_left[ 255 ];
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| 104 | int bitmap_top[ 255 ];
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| 105 | unsigned int glyphs_index[ 255 ];
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| 106 | int text_height;
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| 107 | int baseline;
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| 108 | int use_kerning;
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| 109 | } ContextInfo;
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| 110 |
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| 111 |
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| 112 | void Release(void *ctx)
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| 113 | {
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| 114 | if (ctx)
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| 115 | av_free(ctx);
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| 116 | }
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| 117 |
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| 118 |
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| 119 | static int ParseColor(char *text, unsigned char yuv_color[3])
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| 120 | {
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| 121 | char tmp[3];
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| 122 | unsigned char rgb_color[3];
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| 123 | int i;
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| 124 |
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| 125 | tmp[2] = '\0';
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| 126 |
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| 127 | if ((!text) || (strlen(text) != 7) || (text[0] != '#') )
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| 128 | return -1;
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| 129 |
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| 130 | for (i=0; i < 3; i++)
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| 131 | {
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| 132 | tmp[0] = text[i*2+1];
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| 133 | tmp[1] = text[i*2+2];
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| 134 |
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| 135 | rgb_color[i] = strtol(tmp, NULL, 16);
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| 136 | }
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| 137 |
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| 138 | RGB_TO_YUV(rgb_color, yuv_color);
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| 139 |
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| 140 | return 0;
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| 141 | }
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| 142 |
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| 143 | int Configure(void **ctxp, int argc, char *argv[])
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| 144 | {
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| 145 | int c;
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| 146 | int error;
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| 147 | ContextInfo *ci=NULL;
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| 148 | char *font=NULL;
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| 149 | unsigned int size=16;
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| 150 | FT_BBox bbox;
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| 151 | int yMax, yMin;
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| 152 | *ctxp = av_mallocz(sizeof(ContextInfo));
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| 153 | ci = (ContextInfo *) *ctxp;
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| 154 |
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| 155 | /* configure Context Info */
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| 156 | ci->text = NULL;
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| 157 | ci->file = NULL;
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| 158 | ci->x = ci->y = 0;
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| 159 | ci->fgcolor[0]=255;
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| 160 | ci->fgcolor[1]=128;
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| 161 | ci->fgcolor[2]=128;
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| 162 | ci->bgcolor[0]=0;
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| 163 | ci->fgcolor[1]=128;
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| 164 | ci->fgcolor[2]=128;
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| 165 | ci->bg = 0;
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| 166 | ci->outline = 0;
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| 167 | ci->text_height = 0;
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| 168 |
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| 169 | optind = 0;
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| 170 | while ((c = getopt(argc, argv, "f:t:T:x:y:s:c:C:bo")) > 0) {
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| 171 | switch (c) {
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| 172 | case 'f':
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| 173 | font = optarg;
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| 174 | break;
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| 175 | case 't':
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| 176 | ci->text = av_strdup(optarg);
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| 177 | break;
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| 178 | case 'T':
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| 179 | ci->file = av_strdup(optarg);
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| 180 | break;
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| 181 | case 'x':
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| 182 | ci->x = (unsigned int) atoi(optarg);
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| 183 | break;
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| 184 | case 'y':
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| 185 | ci->y = (unsigned int) atoi(optarg);
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| 186 | break;
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| 187 | case 's':
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| 188 | size = (unsigned int) atoi(optarg);
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| 189 | break;
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| 190 | case 'c':
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| 191 | if (ParseColor(optarg, ci->fgcolor) == -1)
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| 192 | {
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| 193 | fprintf(stderr, "ERROR: Invalid foreground color: '%s'. You must specify the color in the internet way(packaged hex): #RRGGBB, ie: -c #ffffff (for white foreground)\n",optarg);
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| 194 | return -1;
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| 195 | }
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| 196 | break;
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| 197 | case 'C':
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| 198 | if (ParseColor(optarg, ci->bgcolor) == -1)
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| 199 | {
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| 200 | fprintf(stderr, "ERROR: Invalid foreground color: '%s'. You must specify the color in the internet way(packaged hex): #RRGGBB, ie: -c #ffffff (for white foreground)\n",optarg);
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| 201 | return -1;
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| 202 | }
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| 203 | break;
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| 204 | case 'b':
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| 205 | ci->bg=1;
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| 206 | break;
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| 207 | case 'o':
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| 208 | ci->outline=1;
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| 209 | break;
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| 210 | case '?':
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| 211 | fprintf(stderr, "ERROR: Unrecognized argument '%s'\n", argv[optind]);
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| 212 | return -1;
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| 213 | }
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| 214 | }
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| 215 |
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| 216 | if (!ci->text)
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| 217 | {
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| 218 | fprintf(stderr,"ERROR: No text provided (-t text)\n");
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| 219 | return -1;
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| 220 | }
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| 221 |
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| 222 | if (ci->file)
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| 223 | {
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| 224 | FILE *fp;
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| 225 | if ((fp=fopen(ci->file, "r")) == NULL)
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| 226 | {
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| 227 | perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
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| 228 | }
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| 229 | else
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| 230 | {
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| 231 | fclose(fp);
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| 232 | }
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| 233 | }
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| 234 |
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| 235 | if (!font)
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| 236 | {
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| 237 | fprintf(stderr,"ERROR: No font file provided! (-f filename)\n");
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| 238 | return -1;
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| 239 | }
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| 240 |
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| 241 | if ((error = FT_Init_FreeType(&(ci->library))) != 0)
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| 242 | {
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| 243 | fprintf(stderr,"ERROR: Could not load FreeType (error# %d)\n",error);
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| 244 | return -1;
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| 245 | }
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| 246 |
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| 247 | if ((error = FT_New_Face( ci->library, font, 0, &(ci->face) )) != 0)
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| 248 | {
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| 249 | fprintf(stderr,"ERROR: Could not load face: %s (error# %d)\n",font, error);
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| 250 | return -1;
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| 251 | }
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| 252 |
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| 253 | if ((error = FT_Set_Pixel_Sizes( ci->face, 0, size)) != 0)
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| 254 | {
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| 255 | fprintf(stderr,"ERROR: Could not set font size to %d pixels (error# %d)\n",size, error);
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| 256 | return -1;
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| 257 | }
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| 258 |
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| 259 | ci->use_kerning = FT_HAS_KERNING(ci->face);
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| 260 |
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| 261 | /* load and cache glyphs */
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| 262 | yMax = -32000;
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| 263 | yMin = 32000;
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| 264 | for (c=0; c < 256; c++)
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| 265 | {
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| 266 | /* Load char */
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| 267 | error = FT_Load_Char( ci->face, (unsigned char) c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
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| 268 | if (error) continue; /* ignore errors */
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| 269 |
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| 270 | /* Save bitmap */
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| 271 | ci->bitmaps[c] = ci->face->glyph->bitmap;
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| 272 | /* Save bitmap left */
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| 273 | ci->bitmap_left[c] = ci->face->glyph->bitmap_left;
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| 274 | /* Save bitmap top */
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| 275 | ci->bitmap_top[c] = ci->face->glyph->bitmap_top;
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| 276 |
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| 277 | /* Save advance */
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| 278 | ci->advance[c] = ci->face->glyph->advance.x >> 6;
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| 279 |
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| 280 | /* Save glyph */
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| 281 | error = FT_Get_Glyph( ci->face->glyph, &(ci->glyphs[c]) );
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| 282 | /* Save glyph index */
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| 283 | ci->glyphs_index[c] = FT_Get_Char_Index( ci->face, (unsigned char) c );
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| 284 |
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| 285 | /* Measure text height to calculate text_height (or the maximum text height) */
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| 286 | FT_Glyph_Get_CBox( ci->glyphs[ c ], ft_glyph_bbox_pixels, &bbox );
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| 287 | if (bbox.yMax > yMax)
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| 288 | yMax = bbox.yMax;
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| 289 | if (bbox.yMin < yMin)
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| 290 | yMin = bbox.yMin;
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| 291 |
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| 292 | }
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| 293 |
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| 294 | ci->text_height = yMax - yMin;
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| 295 | ci->baseline = yMax;
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| 296 |
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| 297 | return 0;
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| 298 | }
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| 299 |
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| 300 |
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| 301 |
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| 302 |
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| 303 | static inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_fgcolor[3], unsigned char yuv_bgcolor[3], int outline)
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| 304 | {
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| 305 | int r, c;
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| 306 | int spixel, dpixel[3], in_glyph=0;
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| 307 |
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| 308 | if (bitmap->pixel_mode == ft_pixel_mode_mono)
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| 309 | {
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| 310 | in_glyph = 0;
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| 311 | for (r=0; (r < bitmap->rows) && (r+y < height); r++)
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| 312 | {
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| 313 | for (c=0; (c < bitmap->width) && (c+x < width); c++)
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| 314 | {
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| 315 | /* pixel in the picture (destination) */
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| 316 | GET_PIXEL(picture, dpixel, (c+x), (y+r));
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| 317 |
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| 318 | /* pixel in the glyph bitmap (source) */
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| 319 | spixel = bitmap->buffer[r*bitmap->pitch +c/8] & (0x80>>(c%8));
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| 320 |
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| 321 | if (spixel)
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| 322 | COPY_3(dpixel, yuv_fgcolor);
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| 323 |
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| 324 | if (outline)
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| 325 | {
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| 326 | /* border detection: */
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| 327 | if ( (!in_glyph) && (spixel) )
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| 328 | /* left border detected */
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| 329 | {
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| 330 | in_glyph = 1;
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| 331 | /* draw left pixel border */
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| 332 | if (c-1 >= 0)
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| 333 | SET_PIXEL(picture, yuv_bgcolor, (c+x-1), (y+r));
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| 334 | }
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| 335 | else if ( (in_glyph) && (!spixel) )
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| 336 | /* right border detected */
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| 337 | {
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| 338 | in_glyph = 0;
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| 339 | /* 'draw' right pixel border */
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| 340 | COPY_3(dpixel, yuv_bgcolor);
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| 341 | }
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| 342 |
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| 343 | if (in_glyph)
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| 344 | /* see if we have a top/bottom border */
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| 345 | {
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| 346 | /* top */
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| 347 | if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
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| 348 | /* we have a top border */
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| 349 | SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1));
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| 350 |
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| 351 | /* bottom */
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| 352 | if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
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| 353 | /* we have a bottom border */
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| 354 | SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r+1));
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| 355 |
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| 356 | }
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| 357 | }
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| 358 |
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| 359 | SET_PIXEL(picture, dpixel, (c+x), (y+r));
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| 360 | }
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| 361 | }
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| 362 | }
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| 363 | }
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| 364 |
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| 365 |
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| 366 | static inline void draw_box(AVPicture *picture, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_color[3])
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| 367 | {
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| 368 | int i, j;
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| 369 |
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| 370 | for (j = 0; (j < height); j++)
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| 371 | for (i = 0; (i < width); i++)
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| 372 | {
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| 373 | SET_PIXEL(picture, yuv_color, (i+x), (y+j));
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| 374 | }
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| 375 |
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| 376 | }
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| 377 |
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| 378 |
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| 379 |
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| 380 |
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| 381 | void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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| 382 | {
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| 383 | ContextInfo *ci = (ContextInfo *) ctx;
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| 384 | FT_Face face = ci->face;
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| 385 | FT_GlyphSlot slot = face->glyph;
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| 386 | unsigned char *text = ci->text;
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| 387 | unsigned char c;
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| 388 | int x = 0, y = 0, i=0, size=0;
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| 389 | unsigned char buff[MAXSIZE_TEXT];
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| 390 | unsigned char tbuff[MAXSIZE_TEXT];
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| 391 | time_t now = time(0);
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| 392 | int str_w, str_w_max;
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| 393 | FT_Vector pos[MAXSIZE_TEXT];
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| 394 | FT_Vector delta;
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| 395 |
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| 396 | if (ci->file)
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| 397 | {
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| 398 | int fd = open(ci->file, O_RDONLY);
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| 399 |
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| 400 | if (fd < 0)
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| 401 | {
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| 402 | text = ci->text;
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| 403 | perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
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| 404 | }
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| 405 | else
|
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| 406 | {
|
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| 407 | int l = read(fd, tbuff, sizeof(tbuff) - 1);
|
|---|
| 408 |
|
|---|
| 409 | if (l >= 0)
|
|---|
| 410 | {
|
|---|
| 411 | tbuff[l] = 0;
|
|---|
| 412 | text = tbuff;
|
|---|
| 413 | }
|
|---|
| 414 | else
|
|---|
| 415 | {
|
|---|
| 416 | text = ci->text;
|
|---|
| 417 | perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
|
|---|
| 418 | }
|
|---|
| 419 | close(fd);
|
|---|
| 420 | }
|
|---|
| 421 | }
|
|---|
| 422 | else
|
|---|
| 423 | {
|
|---|
| 424 | text = ci->text;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | strftime(buff, sizeof(buff), text, localtime(&now));
|
|---|
| 428 |
|
|---|
| 429 | text = buff;
|
|---|
| 430 |
|
|---|
| 431 | size = strlen(text);
|
|---|
| 432 |
|
|---|
| 433 |
|
|---|
| 434 |
|
|---|
| 435 |
|
|---|
| 436 | /* measure string size and save glyphs position*/
|
|---|
| 437 | str_w = str_w_max = 0;
|
|---|
| 438 | x = ci->x;
|
|---|
| 439 | y = ci->y;
|
|---|
| 440 | for (i=0; i < size; i++)
|
|---|
| 441 | {
|
|---|
| 442 | c = text[i];
|
|---|
| 443 |
|
|---|
| 444 | /* kerning */
|
|---|
| 445 | if ( (ci->use_kerning) && (i > 0) && (ci->glyphs_index[c]) )
|
|---|
| 446 | {
|
|---|
| 447 | FT_Get_Kerning( ci->face,
|
|---|
| 448 | ci->glyphs_index[ text[i-1] ],
|
|---|
| 449 | ci->glyphs_index[c],
|
|---|
| 450 | ft_kerning_default,
|
|---|
| 451 | &delta );
|
|---|
| 452 |
|
|---|
| 453 | x += delta.x >> 6;
|
|---|
| 454 | }
|
|---|
| 455 |
|
|---|
| 456 | if (( (x + ci->advance[ c ]) >= width ) || ( c == '\n' ))
|
|---|
| 457 | {
|
|---|
| 458 | str_w = width - ci->x - 1;
|
|---|
| 459 |
|
|---|
| 460 | y += ci->text_height;
|
|---|
| 461 | x = ci->x;
|
|---|
| 462 | }
|
|---|
| 463 |
|
|---|
| 464 |
|
|---|
| 465 | /* save position */
|
|---|
| 466 | pos[i].x = x + ci->bitmap_left[c];
|
|---|
| 467 | pos[i].y = y - ci->bitmap_top[c] + ci->baseline;
|
|---|
| 468 |
|
|---|
| 469 |
|
|---|
| 470 | x += ci->advance[c];
|
|---|
| 471 |
|
|---|
| 472 |
|
|---|
| 473 | if (str_w > str_w_max)
|
|---|
| 474 | str_w_max = str_w;
|
|---|
| 475 |
|
|---|
| 476 | }
|
|---|
| 477 |
|
|---|
| 478 |
|
|---|
| 479 |
|
|---|
| 480 |
|
|---|
| 481 | if (ci->bg)
|
|---|
| 482 | {
|
|---|
| 483 | /* Check if it doesn't pass the limits */
|
|---|
| 484 | if ( str_w_max + ci->x >= width )
|
|---|
| 485 | str_w_max = width - ci->x - 1;
|
|---|
| 486 | if ( y >= height )
|
|---|
| 487 | y = height - 1 - 2*ci->y;
|
|---|
| 488 |
|
|---|
| 489 | /* Draw Background */
|
|---|
| 490 | draw_box( picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor );
|
|---|
| 491 | }
|
|---|
| 492 |
|
|---|
| 493 |
|
|---|
| 494 |
|
|---|
| 495 | /* Draw Glyphs */
|
|---|
| 496 | for (i=0; i < size; i++)
|
|---|
| 497 | {
|
|---|
| 498 | c = text[i];
|
|---|
| 499 |
|
|---|
| 500 | if (
|
|---|
| 501 | ( (c == '_') && (text == ci->text) ) || /* skip '_' (consider as space)
|
|---|
| 502 | IF text was specified in cmd line
|
|---|
| 503 | (which doesn't like neasted quotes) */
|
|---|
| 504 | ( c == '\n' ) /* Skip new line char, just go to new line */
|
|---|
| 505 | )
|
|---|
| 506 | continue;
|
|---|
| 507 |
|
|---|
| 508 | /* now, draw to our target surface */
|
|---|
| 509 | draw_glyph( picture,
|
|---|
| 510 | &(ci->bitmaps[ c ]),
|
|---|
| 511 | pos[i].x,
|
|---|
| 512 | pos[i].y,
|
|---|
| 513 | width,
|
|---|
| 514 | height,
|
|---|
| 515 | ci->fgcolor,
|
|---|
| 516 | ci->bgcolor,
|
|---|
| 517 | ci->outline );
|
|---|
| 518 |
|
|---|
| 519 | /* increment pen position */
|
|---|
| 520 | x += slot->advance.x >> 6;
|
|---|
| 521 | }
|
|---|
| 522 |
|
|---|
| 523 |
|
|---|
| 524 | }
|
|---|
| 525 |
|
|---|
