mirror of https://git.ffmpeg.org/ffmpeg.git
Updated with many new features.
Originally committed as revision 1587 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Philip Gladstone
parent
9902f4e2e4
commit
0a6de063b0
287
vhook/drawtext.c
287
vhook/drawtext.c
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@ -1,19 +1,29 @@
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/*
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* drawtext.c: print text over the screen
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******************************************************************
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******************************************************************************
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* Options:
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* -f <filename> font filename
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* -s <pixel_size> font size in pixels
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* -f <filename> font filename (MANDATORY!!!)
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* -s <pixel_size> font size in pixels [default 16]
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* -b print background
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* -o outline glyphs (use the bg color)
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* -x <pos> x position ( > 0)
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* -y <pos> y position ( > 0)
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* -x <pos> x position ( >= 0) [default 0]
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* -y <pos> y position ( >= 0) [default 0]
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* -t <text> text to print (will be passed to strftime())
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* -c <#RRGGBB> foreground color ('internet' way)
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* -C <#RRGGBB> background color ('internet' way)
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*
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******************************************************************
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* MANDATORY: will be used even when -T is used.
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* in this case, -t will be used if some error
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* occurs
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* -T <filename> file with the text (re-read every frame)
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* -c <#RRGGBB> foreground color ('internet' way) [default #ffffff]
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* -C <#RRGGBB> background color ('internet' way) [default #000000]
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*
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******************************************************************************
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* Features:
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* - True Type, Type1 and others via FreeType2 library
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* - Font kerning (better output)
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* - Line Wrap (if the text doesn't fit, the next char go to the next line)
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* - Background box
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* - Outline
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******************************************************************************
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* Author: Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
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*
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* This library is free software; you can redistribute it and/or
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@ -30,6 +40,9 @@
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define MAXSIZE_TEXT 1024
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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@ -43,6 +56,7 @@
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_GLYPH_H
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#define RGB_TO_YUV(rgb_color, yuv_color) { \
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yuv_color[0] = ( 0.257 * rgb_color[0]) + (0.504 * rgb_color[1]) + (0.098 * rgb_color[2]) + 16; \
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@ -72,15 +86,25 @@
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typedef struct {
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char *text;
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unsigned char *text;
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unsigned char *file;
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unsigned int x;
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unsigned int y;
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int bg;
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int outline;
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unsigned char bgcolor[3]; /* YUV */
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unsigned char fgcolor[3]; /* YUV */
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FT_Library ft_lib;
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FT_Face ft_face;
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FT_Library library;
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FT_Face face;
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FT_Glyph glyphs[ 255 ];
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FT_Bitmap bitmaps[ 255 ];
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int advance[ 255 ];
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int bitmap_left[ 255 ];
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int bitmap_top[ 255 ];
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unsigned int glyphs_index[ 255 ];
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int text_height;
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int baseline;
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int use_kerning;
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} ContextInfo;
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@ -112,8 +136,6 @@ int ParseColor(char *text, unsigned char yuv_color[3])
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RGB_TO_YUV(rgb_color, yuv_color);
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printf("RGB=%d,%d,%d YUV=%d,%d,%d\n",rgb_color[0],rgb_color[1],rgb_color[2],
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yuv_color[0],yuv_color[1],yuv_color[2]);
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return 0;
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}
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@ -124,12 +146,14 @@ int Configure(void **ctxp, int argc, char *argv[])
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ContextInfo *ci=NULL;
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char *font=NULL;
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unsigned int size=16;
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FT_BBox bbox;
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int yMax, yMin;
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*ctxp = av_mallocz(sizeof(ContextInfo));
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ci = (ContextInfo *) *ctxp;
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/* configure Context Info */
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ci->text = NULL;
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ci->file = NULL;
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ci->x = ci->y = 0;
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ci->fgcolor[0]=255;
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ci->fgcolor[1]=128;
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@ -139,9 +163,10 @@ int Configure(void **ctxp, int argc, char *argv[])
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ci->fgcolor[2]=128;
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ci->bg = 0;
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ci->outline = 0;
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ci->text_height = 0;
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optind = 0;
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while ((c = getopt(argc, argv, "f:t:x:y:s:c:C:bo")) > 0) {
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while ((c = getopt(argc, argv, "f:t:T:x:y:s:c:C:bo")) > 0) {
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switch (c) {
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case 'f':
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font = optarg;
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@ -149,6 +174,9 @@ int Configure(void **ctxp, int argc, char *argv[])
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case 't':
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ci->text = av_strdup(optarg);
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break;
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case 'T':
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ci->file = av_strdup(optarg);
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break;
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case 'x':
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ci->x = (unsigned int) atoi(optarg);
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break;
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@ -190,34 +218,87 @@ int Configure(void **ctxp, int argc, char *argv[])
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return -1;
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}
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if (ci->file)
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{
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FILE *fp;
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if ((fp=fopen(ci->file, "r")) == NULL)
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{
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perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
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}
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else
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{
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fclose(fp);
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}
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}
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if (!font)
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{
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fprintf(stderr,"ERROR: No font file provided! (-f filename)\n");
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return -1;
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}
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if ((error = FT_Init_FreeType(&(ci->ft_lib))) != 0)
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if ((error = FT_Init_FreeType(&(ci->library))) != 0)
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{
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fprintf(stderr,"ERROR: Could not load FreeType (error# %d)\n",error);
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return -1;
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}
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if ((error = FT_New_Face( ci->ft_lib, font, 0, &(ci->ft_face) )) != 0)
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if ((error = FT_New_Face( ci->library, font, 0, &(ci->face) )) != 0)
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{
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fprintf(stderr,"ERROR: Could not load face: %s (error# %d)\n",font, error);
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return -1;
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}
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if ((error = FT_Set_Pixel_Sizes( ci->ft_face, 0, size)) != 0)
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if ((error = FT_Set_Pixel_Sizes( ci->face, 0, size)) != 0)
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{
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fprintf(stderr,"ERROR: Could not set font size to %d pixels (error# %d)\n",size, error);
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return -1;
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}
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ci->use_kerning = FT_HAS_KERNING(ci->face);
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/* load and cache glyphs */
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yMax = -32000;
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yMin = 32000;
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for (c=0; c < 256; c++)
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{
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/* Load char */
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error = FT_Load_Char( ci->face, (unsigned char) c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
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if (error) continue; /* ignore errors */
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/* Save bitmap */
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ci->bitmaps[c] = ci->face->glyph->bitmap;
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/* Save bitmap left */
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ci->bitmap_left[c] = ci->face->glyph->bitmap_left;
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/* Save bitmap top */
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ci->bitmap_top[c] = ci->face->glyph->bitmap_top;
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/* Save advance */
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ci->advance[c] = ci->face->glyph->advance.x >> 6;
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/* Save glyph */
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error = FT_Get_Glyph( ci->face->glyph, &(ci->glyphs[c]) );
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/* Save glyph index */
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ci->glyphs_index[c] = FT_Get_Char_Index( ci->face, (unsigned char) c );
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/* Measure text height to calculate text_height (or the maximum text height) */
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FT_Glyph_Get_CBox( ci->glyphs[ c ], ft_glyph_bbox_pixels, &bbox );
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if (bbox.yMax > yMax)
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yMax = bbox.yMax;
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if (bbox.yMin < yMin)
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yMin = bbox.yMin;
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}
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ci->text_height = yMax - yMin;
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ci->baseline = yMax;
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return 0;
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}
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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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{
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int r, c;
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@ -257,14 +338,15 @@ inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, un
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/* 'draw' right pixel border */
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COPY_3(dpixel, yuv_bgcolor);
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}
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else if (in_glyph)
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if (in_glyph)
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/* see if we have a top/bottom border */
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{
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/* top */
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if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
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/* we have a top border */
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SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1));
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/* bottom */
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if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
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/* we have a bottom border */
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@ -280,16 +362,66 @@ inline void draw_glyph(AVPicture *picture, FT_Bitmap *bitmap, unsigned int x, un
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}
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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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{
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int i, j;
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for (j = 0; (j < height); j++)
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for (i = 0; (i < width); i++)
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{
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SET_PIXEL(picture, yuv_color, (i+x), (y+j));
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}
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}
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void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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{
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ContextInfo *ci = (ContextInfo *) ctx;
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FT_Face face = ci->ft_face;
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FT_Face face = ci->face;
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FT_GlyphSlot slot = face->glyph;
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char *text = ci->text;
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int x = 0, y = 0, i=0, j=0, size=0, error;
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int str_w, str_h;
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char buff[1000];
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unsigned char *text = ci->text;
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unsigned char c;
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int x = 0, y = 0, i=0, size=0;
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unsigned char buff[MAXSIZE_TEXT];
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unsigned char tbuff[MAXSIZE_TEXT];
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time_t now = time(0);
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int str_w, str_w_max;
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FT_Vector pos[MAXSIZE_TEXT];
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FT_Vector delta;
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if (ci->file)
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{
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int fd = open(ci->file, O_RDONLY);
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if (fd < 0)
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{
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text = ci->text;
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perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
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}
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else
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{
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int l = read(fd, tbuff, sizeof(tbuff) - 1);
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if (l >= 0)
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{
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tbuff[l] = 0;
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text = tbuff;
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}
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else
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{
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text = ci->text;
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perror("WARNING: the file could not be opened. Using text provided with -t switch. ");
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}
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close(fd);
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}
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}
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else
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{
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text = ci->text;
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}
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strftime(buff, sizeof(buff), text, localtime(&now));
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@ -297,50 +429,91 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
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size = strlen(text);
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/* measure string size and save glyphs position*/
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str_w = str_w_max = 0;
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x = ci->x;
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y = ci->y;
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/* measure string size */
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str_w = str_h = 0;
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for (i=0; i < size; i++)
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{
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/* load glyph image into the slot (erase previous one) */
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error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
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if (error) continue; /* ignore errors */
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c = text[i];
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str_w += slot->advance.x >> 6;
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if (slot->bitmap_top > str_h)
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str_h = slot->bitmap_top;
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/* kerning */
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if ( (ci->use_kerning) && (i > 0) && (ci->glyphs_index[c]) )
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{
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FT_Get_Kerning( ci->face,
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ci->glyphs_index[ text[i-1] ],
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ci->glyphs_index[c],
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ft_kerning_default,
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&delta );
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x += delta.x >> 6;
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}
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if (( (x + ci->advance[ c ]) >= width ) || ( c == '\n' ))
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{
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str_w = width - ci->x - 1;
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y += ci->text_height;
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x = ci->x;
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}
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/* save position */
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pos[i].x = x + ci->bitmap_left[c];
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pos[i].y = y - ci->bitmap_top[c] + ci->baseline;
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x += ci->advance[c];
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if (str_w > str_w_max)
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str_w_max = str_w;
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}
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if (ci->bg)
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{
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/* Check if it doesn't pass the limits */
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if ( str_w_max + ci->x >= width )
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str_w_max = width - ci->x - 1;
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if ( y >= height )
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y = height - 1 - 2*ci->y;
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/* Draw Background */
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draw_box( picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor );
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}
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if (ci->bg)
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/* draw background */
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for (j = 0; (j < str_h) && (j+y < height); j++)
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for (i = 0; (i < str_w) && (i+x < width); i++)
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{
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SET_PIXEL(picture, ci->bgcolor, (i+x), (y+j));
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}
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/* Draw Glyphs */
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for (i=0; i < size; i++)
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{
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/* load glyph image into the slot (erase previous one) */
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error = FT_Load_Char( face, text[i], FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
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if (error) continue; /* ignore errors */
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if (text[i] != '_') /* skip '_' (consider as space) */
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c = text[i];
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if (
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( (c == '_') && (text == ci->text) ) || /* skip '_' (consider as space)
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IF text was specified in cmd line
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(which doesn't like neasted quotes) */
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( c == '\n' ) /* Skip new line char, just go to new line */
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)
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continue;
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/* now, draw to our target surface */
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draw_glyph( picture, &slot->bitmap,
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x + slot->bitmap_left,
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y - slot->bitmap_top + str_h,
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width, height,
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ci->fgcolor, ci->bgcolor,
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ci->outline);
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draw_glyph( picture,
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&(ci->bitmaps[ c ]),
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pos[i].x,
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pos[i].y,
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width,
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height,
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ci->fgcolor,
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ci->bgcolor,
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ci->outline );
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/* increment pen position */
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x += slot->advance.x >> 6;
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