[gst-devel] Re: [gst-cvs] leroutier gst-plugins: gst-plugins/ gst-plugins/ext/dv/ gst-plugins/ext/libfame/ gst-plugins/gst/subparse/ gst-plugins/gst/y4m/

[David I. Lehn]

* Stephane Loeuillet <leroutier at freedesktop.org> [2005-01-14T07:33:09-0500]:
>         * gst/y4m/gsty4mencode.c: (gst_y4mencode_sinkconnect):
>           replace framerate aproximations by their real value
>           (24000/1001, 30000/1001, 60000/1001)
>           Finish fixing bug #164049
...
>  #define NTSC_HEIGHT 480
>  #define NTSC_BUFFER 120000
> -#define NTSC_FRAMERATE 29.997
> +#define NTSC_FRAMERATE 30000/1001
>  #define PAL_HEIGHT 576
>  #define PAL_BUFFER 144000
...
> -  const double frames_per_sec = 23.98;
> +  const double frames_per_sec = 24000 / 1001;
...
> -    23.976, 24.000,             /* 24fps movie */
> +    24000 / 1001, 24.000,       /* 24fps movie */
>      25.000,                     /* PAL */
> -    29.970, 30.000,             /* NTSC */
> +    30000 / 1001, 30.000,       /* NTSC */
>      50.000,
> -    59.940, 60.000
> +    60000 / 1001, 60.000
...
(more?)
...

Today's lesson: C compilers, integer constant division, and testing.

#include <stdio.h>
int main() {
	const double old = 23.98;
	const double new = 24000 / 1001;
	printf("%g %g\n", old, new);
	return 0;
}

$ cc -g -Wall a.c; ./a.out
23.98 23

-dave