ffmpeg/FFmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-09-20 05:16:38 +00:00
Code Issues Packages Projects Releases Wiki Activity

Extend init_loop_filter to work for filter limit values up to 127 instead

Browse Source 
of only up to 64. 127 is the maximum value allowed by the theora specification.

Originally committed as revision 19350 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2009-07-05 18:25:58 +00:00
parent ad92108694
commit 7fa5f9990b
1 changed files with 9 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
libavcodec/vp3.c
View File

@ -517,23 +517,30 @@ static void init_dequantizer(Vp3DecodeContext *s, int qpi)
/*
* This function initializes the loop filter boundary limits if the frame's
* quality index is different from the previous frame's.
*
* The filter_limit_values may not be larger than 127.
*/
static void init_loop_filter(Vp3DecodeContext *s)
{
int *bounding_values= s->bounding_values_array+127;
int filter_limit;
int x;
int value;
filter_limit = s->filter_limit_values[s->qps[0]];
/* set up the bounding values */
memset(s->bounding_values_array, 0, 256 * sizeof(int));
for (x = 0; x < filter_limit; x++) {
bounding_values[-x - filter_limit] = -filter_limit + x;
bounding_values[-x] = -x;
bounding_values[x] = x;
bounding_values[x + filter_limit] = filter_limit - x;
}
for (x = value = filter_limit; x < 128 && value; x++, value--) {
bounding_values[ x] = value;
bounding_values[-x] = -value;
}
if (value)
bounding_values[128] = value;
bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202;
}