[MPlayer-dev-eng] New remove-logo filter

[Reimar Döffinger]

Hi,
On Wed, Feb 23, 2005 at 06:14:59PM +0100, Reimar Döffinger wrote:
> No it is not (that's why I said raw pgm, not ASCII pgm). Only the header is TEXT.

If that still scares you, I attached a working parser for pgm file.
Instead of the last three fgetc you should of course use fread to read
the whole image data in a block.

Greetings,
Reimar Döffinger
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#include <stdio.h>
#include <ctype.h>

void skip(FILE *f) {
  int c, comment = 0;
  do {
    c = fgetc(f);
    if (c == '#')
      comment = 1;
    if (c == '\n')
      comment = 0;
  } while (c != EOF && (isspace(c) || comment));
  ungetc(c, f);
}

int main() {
  int width, height, maxval, val;
  FILE *f = fopen("test.pgm", "r");
  if (!f)
    return -1;
  skip(f);
  if (fgetc(f) != 'P' || fgetc(f) != '5')
    return -1;
  skip(f);
  if (fscanf(f, "%i", &width) != 1)
    return -1;
  skip(f);
  if (fscanf(f, "%i", &height) != 1)
    return -1;
  skip(f);
  if (fscanf(f, "%i", &maxval) != 1)
    return -1;
  val = fgetc(f);
  if (!isspace(val))
    return -1;
  printf("w: %i, h: %i, m: %i\n", width, height, maxval);
  printf("val1: %i\n", fgetc(f));
  printf("val2: %i\n", fgetc(f));
  printf("val3: %i\n", fgetc(f));
  fclose(f);
  return 0;
}