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sample1.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include "mpeg2.h"


Defines
#define	BUFFER_SIZE 4096
Functions
void	save_pgm (int width, int height, uint8_t const buf, int num)
void	sample1 (FILE *file)
int	main (int argc, char **argv)

Define Documentation

#define BUFFER_SIZE 4096

Function Documentation

int main	(	int	argc,
		char **	argv
	)

Definition at line 86 of file sample1.c.

References argc, file, and sample1().

00087 {
00088     FILE * file;
00089 
00090     if (argc > 1) {
00091         file = fopen (argv[1], "rb");
00092         if (!file) {
00093             fprintf (stderr, "Could not open file %s\n", argv[1]);
00094             exit (1);
00095         }
00096     } else
00097         file = stdin;
00098 
00099     sample1 (file);
00100 
00101     return 0;
00102 }

void sample1 ( FILE * file ) [static]

Definition at line 51 of file sample1.c.

References fbuf_t::buf, mpeg2_info_t::display_fbuf, file, sequence_t::height, mpeg2_buffer(), mpeg2_close(), mpeg2_info(), mpeg2_init(), mpeg2_parse(), save_pgm(), mpeg2_info_t::sequence, STATE_END, STATE_SLICE, uint8_t, and sequence_t::width.

Referenced by main().

00052 {
00053 #define BUFFER_SIZE 4096
00054     uint8_t buffer[BUFFER_SIZE];
00055     mpeg2dec_t * mpeg2dec;
00056     const mpeg2_info_t * info;
00057     int state;
00058     int size;
00059     int framenum = 0;
00060 
00061     mpeg2dec = mpeg2_init ();
00062     if (mpeg2dec == NULL)
00063         exit (1);
00064     info = mpeg2_info (mpeg2dec);
00065 
00066     size = BUFFER_SIZE;
00067     do {
00068         state = mpeg2_parse (mpeg2dec);
00069         switch (state) {
00070         case -1:
00071             size = fread (buffer, 1, BUFFER_SIZE, file);
00072             mpeg2_buffer (mpeg2dec, buffer, buffer + size);
00073             break;
00074         case STATE_SLICE:
00075         case STATE_END:
00076             if (info->display_fbuf)
00077                 save_pgm (info->sequence->width, info->sequence->height,
00078                           info->display_fbuf->buf, framenum++);
00079             break;
00080         }
00081     } while (size);
00082 
00083     mpeg2_close (mpeg2dec);
00084 }

void save_pgm	(	int	width,
		int	height,
		uint8_t const	buf,
		int	num
	)	`[static]`

Definition at line 30 of file sample1.c.

References i, and uint8_t.

Referenced by sample1().

00031 {
00032     char filename[100];
00033     FILE * pgmfile;
00034     int i;
00035 
00036     sprintf (filename, "%d.pgm", num);
00037     pgmfile = fopen (filename, "wb");
00038     if (!pgmfile)
00039         return;
00040     fprintf (pgmfile, "P5\n%d %d\n255\n", width, height * 3 / 2);
00041     fwrite (buf[0], width, height, pgmfile);
00042     width >>= 1;
00043     height >>= 1;
00044     for (i = 0; i < height; i++) {
00045         fwrite (buf[1] + i * width, width, 1, pgmfile);
00046         fwrite (buf[2] + i * width, width, 1, pgmfile);
00047     }
00048     fclose (pgmfile);
00049 }

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