diff options
Diffstat (limited to 'libavcore/imgutils.c')
| -rw-r--r-- | libavcore/imgutils.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/libavcore/imgutils.c b/libavcore/imgutils.c index ebaeff16c5..2131f0ac14 100644 --- a/libavcore/imgutils.c +++ b/libavcore/imgutils.c @@ -24,6 +24,24 @@ #include "imgutils.h" #include "libavutil/pixdesc.h" +void av_fill_image_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], + const AVPixFmtDescriptor *pixdesc) +{ + int i; + memset(max_pixsteps, 0, 4*sizeof(max_pixsteps[0])); + if (max_pixstep_comps) + memset(max_pixstep_comps, 0, 4*sizeof(max_pixstep_comps[0])); + + for (i = 0; i < 4; i++) { + const AVComponentDescriptor *comp = &(pixdesc->comp[i]); + if ((comp->step_minus1+1) > max_pixsteps[comp->plane]) { + max_pixsteps[comp->plane] = comp->step_minus1+1; + if (max_pixstep_comps) + max_pixstep_comps[comp->plane] = i; + } + } +} + int av_get_image_linesize(enum PixelFormat pix_fmt, int width, int plane) { const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt]; |