vhook/drawtext.c File Reference

#include "libavformat/framehook.h"
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <ft2build.h>
#include <FT_FREETYPE_H>
#include <FT_GLYPH_H>

Go to the source code of this file.

Data Structures
struct	ContextInfo
	Context info for this vhook - stores the pipe and image buffers. More...
Defines
#define	MAXSIZE_TEXT   1024
#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)
#define	COPY_3(dst, src)
#define	SET_PIXEL(picture, yuv_color, x, y)
#define	GET_PIXEL(picture, yuv_color, x, y)
Functions
void	Release (void *ctx)
static int	ParseColor (char *text, unsigned char yuv_color[3])
int	Configure (void **ctxp, int argc, char *argv[])
static 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)
static void	draw_box (AVPicture *picture, unsigned int x, unsigned int y, unsigned int width, unsigned int height, unsigned char yuv_color[3])
void	Process (void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)

---

Define Documentation

#define COPY_3	(	dst,
		src		)

Value:

{ \
    dst[0]=src[0]; \
    dst[1]=src[1]; \
    dst[2]=src[2]; \
}

Definition at line 74 of file drawtext.c.

Referenced by draw_glyph().

#define FIX

(

x

)

((int) ((x) * (1<<SCALEBITS) + 0.5))

Definition at line 66 of file drawtext.c.

#define GET_PIXEL	(	picture,
		yuv_color,
		x,
		y		)

Value:

{ \
    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] ]; \
}

Definition at line 88 of file drawtext.c.

Referenced by draw_glyph().

#define MAXSIZE_TEXT   1024

Definition at line 46 of file drawtext.c.

Referenced by Process().

#define ONE_HALF   (1 << (SCALEBITS - 1))

Definition at line 65 of file drawtext.c.

#define RGB_TO_YUV	(	rgb_color,
		yuv_color		)

Value:

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)

Definition at line 68 of file drawtext.c.

Referenced by ParseColor().

#define SCALEBITS   10

Definition at line 64 of file drawtext.c.

#define SET_PIXEL	(	picture,
		yuv_color,
		x,
		y		)

Value:

{ \
    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]; \
}

Definition at line 82 of file drawtext.c.

Referenced by draw_box(), and draw_glyph().

---

Function Documentation

int Configure	(	void **	ctxp,
		int	argc,
		char *	argv[]
	)

Definition at line 149 of file drawtext.c.

static void draw_box	(	AVPicture *	picture,
		unsigned int	x,
		unsigned int	y,
		unsigned int	width,
		unsigned int	height,
		unsigned char	yuv_color[3]
	)			[inline, static]

Definition at line 372 of file drawtext.c.

Referenced by Process().

static 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
	)			[inline, static]

Definition at line 309 of file drawtext.c.

Referenced by Process().

static int ParseColor	(	char *	text,
		unsigned char	yuv_color[3]
	)			[static]

Definition at line 125 of file drawtext.c.

Referenced by Configure().

void Process	(	void *	ctx,
		AVPicture *	picture,
		enum PixelFormat	pix_fmt,
		int	width,
		int	height,
		int64_t	pts
	)

Definition at line 387 of file drawtext.c.

void Release

(

void *

ctx

)

Definition at line 118 of file drawtext.c.