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avutil/pixdesc: support for self-checking the descriptors 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-16 14:16:03 +02:00
parent 1314f534e5
commit 20e99a9c10
3 changed files with 29 additions and 0 deletions
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25
libavutil/pixdesc.c
View File

@ -22,6 +22,7 @@
#include <stdio.h>
#include <string.h>
#include "avassert.h"
#include "common.h"
#include "pixfmt.h"
#include "pixdesc.h"
@ -1828,3 +1829,27 @@ int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
ret += planes[i];
return ret;
}
void ff_check_pixfmt_descriptors(void){
int i, j;
for (i=0; i<FF_ARRAY_ELEMS(av_pix_fmt_descriptors); i++) {
const AVPixFmtDescriptor *d = &av_pix_fmt_descriptors[i];
if (!d->name && !d->nb_components && !d->log2_chroma_w && !d->log2_chroma_h && !d->flags)
continue;
// av_log(NULL, AV_LOG_DEBUG, "Checking: %s\n", d->name);
av_assert0(d->log2_chroma_w <= 3);
av_assert0(d->log2_chroma_h <= 3);
av_assert0(d->nb_components <= 4);
av_assert0(d->name && d->name[0]);
av_assert0((d->nb_components==4 || d->nb_components==2) == !!(d->flags & PIX_FMT_ALPHA));
av_assert2(av_get_pix_fmt(d->name) == i);
for (j=0; j<FF_ARRAY_ELEMS(d->comp); j++) {
const AVComponentDescriptor *c = &d->comp[j];
if(j>=d->nb_components)
av_assert0(!c->plane && !c->step_minus1 && !c->offset_plus1 && !c->shift && !c->depth_minus1);
}
}
}

1
libavutil/pixdesc.h
View File

@ -239,5 +239,6 @@ int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt,
*/
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt);
void ff_check_pixfmt_descriptors(void);
#endif /* AVUTIL_PIXDESC_H */

3
libavutil/utils.c
View File

@ -20,6 +20,7 @@
#include "avutil.h"
#include "avassert.h"
#include "samplefmt.h"
#include "pixdesc.h"
/**
* @file
@ -40,6 +41,8 @@ unsigned avutil_version(void)
abort();
}
ff_check_pixfmt_descriptors();
return LIBAVUTIL_VERSION_INT;
}