mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-16 04:15:05 +00:00
2959ba80c2
Originally committed as revision 6843 to svn://svn.ffmpeg.org/ffmpeg/trunk
532 lines
15 KiB
C
532 lines
15 KiB
C
/*
|
|
* drawtext.c: print text over the screen
|
|
******************************************************************************
|
|
* Options:
|
|
* -f <filename> font filename (MANDATORY!!!)
|
|
* -s <pixel_size> font size in pixels [default 16]
|
|
* -b print background
|
|
* -o outline glyphs (use the bg color)
|
|
* -x <pos> x position ( >= 0) [default 0]
|
|
* -y <pos> y position ( >= 0) [default 0]
|
|
* -t <text> text to print (will be passed to strftime())
|
|
* MANDATORY: will be used even when -T is used.
|
|
* in this case, -t will be used if some error
|
|
* occurs
|
|
* -T <filename> file with the text (re-read every frame)
|
|
* -c <#RRGGBB> foreground color ('internet' way) [default #ffffff]
|
|
* -C <#RRGGBB> background color ('internet' way) [default #000000]
|
|
*
|
|
******************************************************************************
|
|
* Features:
|
|
* - True Type, Type1 and others via FreeType2 library
|
|
* - Font kerning (better output)
|
|
* - Line Wrap (if the text doesn't fit, the next char go to the next line)
|
|
* - Background box
|
|
* - Outline
|
|
******************************************************************************
|
|
* Author: Gustavo Sverzut Barbieri <gsbarbieri@yahoo.com.br>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#define MAXSIZE_TEXT 1024
|
|
|
|
#include "framehook.h"
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#undef time
|
|
#include <sys/time.h>
|
|
#include <time.h>
|
|
|
|
#include <ft2build.h>
|
|
#include FT_FREETYPE_H
|
|
#include FT_GLYPH_H
|
|
|
|
#define SCALEBITS 10
|
|
#define ONE_HALF (1 << (SCALEBITS - 1))
|
|
#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
|
|
|
|
#define RGB_TO_YUV(rgb_color, yuv_color) do { \
|
|
yuv_color[0] = (FIX(0.29900) * rgb_color[0] + FIX(0.58700) * rgb_color[1] + FIX(0.11400) * rgb_color[2] + ONE_HALF) >> SCALEBITS; \
|
|
yuv_color[2] = ((FIX(0.50000) * rgb_color[0] - FIX(0.41869) * rgb_color[1] - FIX(0.08131) * rgb_color[2] + ONE_HALF - 1) >> SCALEBITS) + 128; \
|
|
yuv_color[1] = ((- FIX(0.16874) * rgb_color[0] - FIX(0.33126) * rgb_color[1] + FIX(0.50000) * rgb_color[2] + ONE_HALF - 1) >> SCALEBITS) + 128; \
|
|
} while (0)
|
|
|
|
#define COPY_3(dst,src) { \
|
|
dst[0]=src[0]; \
|
|
dst[1]=src[1]; \
|
|
dst[2]=src[2]; \
|
|
}
|
|
|
|
|
|
|
|
#define SET_PIXEL(picture, yuv_color, x, y) { \
|
|
picture->data[0][ (x) + (y)*picture->linesize[0] ] = yuv_color[0]; \
|
|
picture->data[1][ ((x/2) + (y/2)*picture->linesize[1]) ] = yuv_color[1]; \
|
|
picture->data[2][ ((x/2) + (y/2)*picture->linesize[2]) ] = yuv_color[2]; \
|
|
}
|
|
|
|
#define GET_PIXEL(picture, yuv_color, x, y) { \
|
|
yuv_color[0] = picture->data[0][ (x) + (y)*picture->linesize[0] ]; \
|
|
yuv_color[1] = picture->data[1][ (x/2) + (y/2)*picture->linesize[1] ]; \
|
|
yuv_color[2] = picture->data[2][ (x/2) + (y/2)*picture->linesize[2] ]; \
|
|
}
|
|
|
|
|
|
typedef struct {
|
|
unsigned char *text;
|
|
char *file;
|
|
unsigned int x;
|
|
unsigned int y;
|
|
int bg;
|
|
int outline;
|
|
unsigned char bgcolor[3]; /* YUV */
|
|
unsigned char fgcolor[3]; /* YUV */
|
|
FT_Library library;
|
|
FT_Face face;
|
|
FT_Glyph glyphs[ 255 ];
|
|
FT_Bitmap bitmaps[ 255 ];
|
|
int advance[ 255 ];
|
|
int bitmap_left[ 255 ];
|
|
int bitmap_top[ 255 ];
|
|
unsigned int glyphs_index[ 255 ];
|
|
int text_height;
|
|
int baseline;
|
|
int use_kerning;
|
|
} ContextInfo;
|
|
|
|
|
|
void Release(void *ctx)
|
|
{
|
|
if (ctx)
|
|
av_free(ctx);
|
|
}
|
|
|
|
|
|
static int ParseColor(char *text, unsigned char yuv_color[3])
|
|
{
|
|
char tmp[3];
|
|
unsigned char rgb_color[3];
|
|
int i;
|
|
|
|
tmp[2] = '\0';
|
|
|
|
if ((!text) || (strlen(text) != 7) || (text[0] != '#') )
|
|
return -1;
|
|
|
|
for (i=0; i < 3; i++)
|
|
{
|
|
tmp[0] = text[i*2+1];
|
|
tmp[1] = text[i*2+2];
|
|
|
|
rgb_color[i] = strtol(tmp, NULL, 16);
|
|
}
|
|
|
|
RGB_TO_YUV(rgb_color, yuv_color);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int Configure(void **ctxp, int argc, char *argv[])
|
|
{
|
|
int c;
|
|
int error;
|
|
ContextInfo *ci=NULL;
|
|
char *font=NULL;
|
|
unsigned int size=16;
|
|
FT_BBox bbox;
|
|
int yMax, yMin;
|
|
*ctxp = av_mallocz(sizeof(ContextInfo));
|
|
ci = (ContextInfo *) *ctxp;
|
|
|
|
/* configure Context Info */
|
|
ci->text = NULL;
|
|
ci->file = NULL;
|
|
ci->x = ci->y = 0;
|
|
ci->fgcolor[0]=255;
|
|
ci->fgcolor[1]=128;
|
|
ci->fgcolor[2]=128;
|
|
ci->bgcolor[0]=0;
|
|
ci->fgcolor[1]=128;
|
|
ci->fgcolor[2]=128;
|
|
ci->bg = 0;
|
|
ci->outline = 0;
|
|
ci->text_height = 0;
|
|
|
|
optind = 0;
|
|
while ((c = getopt(argc, argv, "f:t:T:x:y:s:c:C:bo")) > 0) {
|
|
switch (c) {
|
|
case 'f':
|
|
font = optarg;
|
|
break;
|
|
case 't':
|
|
ci->text = av_strdup(optarg);
|
|
break;
|
|
case 'T':
|
|
ci->file = av_strdup(optarg);
|
|
break;
|
|
case 'x':
|
|
ci->x = (unsigned int) atoi(optarg);
|
|
break;
|
|
case 'y':
|
|
ci->y = (unsigned int) atoi(optarg);
|
|
break;
|
|
case 's':
|
|
size = (unsigned int) atoi(optarg);
|
|
break;
|
|
case 'c':
|
|
if (ParseColor(optarg, ci->fgcolor) == -1)
|
|
{
|
|
av_log(NULL, AV_LOG_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);
|
|
return -1;
|
|
}
|
|
break;
|
|
case 'C':
|
|
if (ParseColor(optarg, ci->bgcolor) == -1)
|
|
{
|
|
av_log(NULL, AV_LOG_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);
|
|
return -1;
|
|
}
|
|
break;
|
|
case 'b':
|
|
ci->bg=1;
|
|
break;
|
|
case 'o':
|
|
ci->outline=1;
|
|
break;
|
|
case '?':
|
|
av_log(NULL, AV_LOG_ERROR, "Unrecognized argument '%s'\n", argv[optind]);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (!ci->text)
|
|
{
|
|
av_log(NULL, AV_LOG_ERROR, "No text provided (-t text)\n");
|
|
return -1;
|
|
}
|
|
|
|
if (ci->file)
|
|
{
|
|
FILE *fp;
|
|
if ((fp=fopen(ci->file, "r")) == NULL)
|
|
{
|
|
av_log(NULL, AV_LOG_INFO, "WARNING: The file could not be opened. Using text provided with -t switch: %s", strerror(errno));
|
|
}
|
|
else
|
|
{
|
|
fclose(fp);
|
|
}
|
|
}
|
|
|
|
if (!font)
|
|
{
|
|
av_log(NULL, AV_LOG_ERROR, "No font file provided! (-f filename)\n");
|
|
return -1;
|
|
}
|
|
|
|
if ((error = FT_Init_FreeType(&(ci->library))) != 0)
|
|
{
|
|
av_log(NULL, AV_LOG_ERROR, "Could not load FreeType (error# %d).\n", error);
|
|
return -1;
|
|
}
|
|
|
|
if ((error = FT_New_Face( ci->library, font, 0, &(ci->face) )) != 0)
|
|
{
|
|
av_log(NULL, AV_LOG_ERROR, "Could not load face: %s (error# %d).\n", font, error);
|
|
return -1;
|
|
}
|
|
|
|
if ((error = FT_Set_Pixel_Sizes( ci->face, 0, size)) != 0)
|
|
{
|
|
av_log(NULL, AV_LOG_ERROR, "Could not set font size to %d pixels (error# %d).\n", size, error);
|
|
return -1;
|
|
}
|
|
|
|
ci->use_kerning = FT_HAS_KERNING(ci->face);
|
|
|
|
/* load and cache glyphs */
|
|
yMax = -32000;
|
|
yMin = 32000;
|
|
for (c=0; c < 256; c++)
|
|
{
|
|
/* Load char */
|
|
error = FT_Load_Char( ci->face, (unsigned char) c, FT_LOAD_RENDER | FT_LOAD_MONOCHROME );
|
|
if (error) continue; /* ignore errors */
|
|
|
|
/* Save bitmap */
|
|
ci->bitmaps[c] = ci->face->glyph->bitmap;
|
|
/* Save bitmap left */
|
|
ci->bitmap_left[c] = ci->face->glyph->bitmap_left;
|
|
/* Save bitmap top */
|
|
ci->bitmap_top[c] = ci->face->glyph->bitmap_top;
|
|
|
|
/* Save advance */
|
|
ci->advance[c] = ci->face->glyph->advance.x >> 6;
|
|
|
|
/* Save glyph */
|
|
error = FT_Get_Glyph( ci->face->glyph, &(ci->glyphs[c]) );
|
|
/* Save glyph index */
|
|
ci->glyphs_index[c] = FT_Get_Char_Index( ci->face, (unsigned char) c );
|
|
|
|
/* Measure text height to calculate text_height (or the maximum text height) */
|
|
FT_Glyph_Get_CBox( ci->glyphs[ c ], ft_glyph_bbox_pixels, &bbox );
|
|
if (bbox.yMax > yMax)
|
|
yMax = bbox.yMax;
|
|
if (bbox.yMin < yMin)
|
|
yMin = bbox.yMin;
|
|
|
|
}
|
|
|
|
ci->text_height = yMax - yMin;
|
|
ci->baseline = yMax;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
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)
|
|
{
|
|
int r, c;
|
|
int spixel, dpixel[3], in_glyph=0;
|
|
|
|
if (bitmap->pixel_mode == ft_pixel_mode_mono)
|
|
{
|
|
in_glyph = 0;
|
|
for (r=0; (r < bitmap->rows) && (r+y < height); r++)
|
|
{
|
|
for (c=0; (c < bitmap->width) && (c+x < width); c++)
|
|
{
|
|
/* pixel in the picture (destination) */
|
|
GET_PIXEL(picture, dpixel, (c+x), (y+r));
|
|
|
|
/* pixel in the glyph bitmap (source) */
|
|
spixel = bitmap->buffer[r*bitmap->pitch +c/8] & (0x80>>(c%8));
|
|
|
|
if (spixel)
|
|
COPY_3(dpixel, yuv_fgcolor);
|
|
|
|
if (outline)
|
|
{
|
|
/* border detection: */
|
|
if ( (!in_glyph) && (spixel) )
|
|
/* left border detected */
|
|
{
|
|
in_glyph = 1;
|
|
/* draw left pixel border */
|
|
if (c-1 >= 0)
|
|
SET_PIXEL(picture, yuv_bgcolor, (c+x-1), (y+r));
|
|
}
|
|
else if ( (in_glyph) && (!spixel) )
|
|
/* right border detected */
|
|
{
|
|
in_glyph = 0;
|
|
/* 'draw' right pixel border */
|
|
COPY_3(dpixel, yuv_bgcolor);
|
|
}
|
|
|
|
if (in_glyph)
|
|
/* see if we have a top/bottom border */
|
|
{
|
|
/* top */
|
|
if ( (r-1 >= 0) && (! bitmap->buffer[(r-1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
|
|
/* we have a top border */
|
|
SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r-1));
|
|
|
|
/* bottom */
|
|
if ( (r+1 < height) && (! bitmap->buffer[(r+1)*bitmap->pitch +c/8] & (0x80>>(c%8))) )
|
|
/* we have a bottom border */
|
|
SET_PIXEL(picture, yuv_bgcolor, (c+x), (y+r+1));
|
|
|
|
}
|
|
}
|
|
|
|
SET_PIXEL(picture, dpixel, (c+x), (y+r));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static inline void draw_box(AVPicture *picture, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_color[3])
|
|
{
|
|
int i, j;
|
|
|
|
for (j = 0; (j < height); j++)
|
|
for (i = 0; (i < width); i++)
|
|
{
|
|
SET_PIXEL(picture, yuv_color, (i+x), (y+j));
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
|
|
{
|
|
ContextInfo *ci = (ContextInfo *) ctx;
|
|
FT_Face face = ci->face;
|
|
FT_GlyphSlot slot = face->glyph;
|
|
unsigned char *text = ci->text;
|
|
unsigned char c;
|
|
int x = 0, y = 0, i=0, size=0;
|
|
unsigned char buff[MAXSIZE_TEXT];
|
|
unsigned char tbuff[MAXSIZE_TEXT];
|
|
time_t now = time(0);
|
|
int str_w, str_w_max;
|
|
FT_Vector pos[MAXSIZE_TEXT];
|
|
FT_Vector delta;
|
|
|
|
if (ci->file)
|
|
{
|
|
int fd = open(ci->file, O_RDONLY);
|
|
|
|
if (fd < 0)
|
|
{
|
|
text = ci->text;
|
|
av_log(NULL, AV_LOG_INFO, "WARNING: The file could not be opened. Using text provided with -t switch: %s", strerror(errno));
|
|
}
|
|
else
|
|
{
|
|
int l = read(fd, tbuff, sizeof(tbuff) - 1);
|
|
|
|
if (l >= 0)
|
|
{
|
|
tbuff[l] = 0;
|
|
text = tbuff;
|
|
}
|
|
else
|
|
{
|
|
text = ci->text;
|
|
av_log(NULL, AV_LOG_INFO, "WARNING: The file could not be read. Using text provided with -t switch: %s", strerror(errno));
|
|
}
|
|
close(fd);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
text = ci->text;
|
|
}
|
|
|
|
strftime(buff, sizeof(buff), text, localtime(&now));
|
|
|
|
text = buff;
|
|
|
|
size = strlen(text);
|
|
|
|
|
|
|
|
|
|
/* measure string size and save glyphs position*/
|
|
str_w = str_w_max = 0;
|
|
x = ci->x;
|
|
y = ci->y;
|
|
for (i=0; i < size; i++)
|
|
{
|
|
c = text[i];
|
|
|
|
/* kerning */
|
|
if ( (ci->use_kerning) && (i > 0) && (ci->glyphs_index[c]) )
|
|
{
|
|
FT_Get_Kerning( ci->face,
|
|
ci->glyphs_index[ text[i-1] ],
|
|
ci->glyphs_index[c],
|
|
ft_kerning_default,
|
|
&delta );
|
|
|
|
x += delta.x >> 6;
|
|
}
|
|
|
|
if (( (x + ci->advance[ c ]) >= width ) || ( c == '\n' ))
|
|
{
|
|
str_w = width - ci->x - 1;
|
|
|
|
y += ci->text_height;
|
|
x = ci->x;
|
|
}
|
|
|
|
|
|
/* save position */
|
|
pos[i].x = x + ci->bitmap_left[c];
|
|
pos[i].y = y - ci->bitmap_top[c] + ci->baseline;
|
|
|
|
|
|
x += ci->advance[c];
|
|
|
|
|
|
if (str_w > str_w_max)
|
|
str_w_max = str_w;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (ci->bg)
|
|
{
|
|
/* Check if it doesn't pass the limits */
|
|
if ( str_w_max + ci->x >= width )
|
|
str_w_max = width - ci->x - 1;
|
|
if ( y >= height )
|
|
y = height - 1 - 2*ci->y;
|
|
|
|
/* Draw Background */
|
|
draw_box( picture, ci->x, ci->y, str_w_max, y - ci->y, ci->bgcolor );
|
|
}
|
|
|
|
|
|
|
|
/* Draw Glyphs */
|
|
for (i=0; i < size; i++)
|
|
{
|
|
c = text[i];
|
|
|
|
if (
|
|
( (c == '_') && (text == ci->text) ) || /* skip '_' (consider as space)
|
|
IF text was specified in cmd line
|
|
(which doesn't like neasted quotes) */
|
|
( c == '\n' ) /* Skip new line char, just go to new line */
|
|
)
|
|
continue;
|
|
|
|
/* now, draw to our target surface */
|
|
draw_glyph( picture,
|
|
&(ci->bitmaps[ c ]),
|
|
pos[i].x,
|
|
pos[i].y,
|
|
width,
|
|
height,
|
|
ci->fgcolor,
|
|
ci->bgcolor,
|
|
ci->outline );
|
|
|
|
/* increment pen position */
|
|
x += slot->advance.x >> 6;
|
|
}
|
|
|
|
|
|
}
|
|
|