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Code Issues Releases Activity

lavfi/formats: add ff_formats_pixdesc_filter().

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This commit is contained in:
Nicolas George 2020-04-16 16:40:40 +02:00
parent aef670cff4
commit 563e1df5d6
2 changed files with 51 additions and 0 deletions
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41
libavfilter/formats.c
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@ -373,6 +373,47 @@ const int64_t avfilter_all_channel_layouts[] = {
-1
};
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
{
unsigned nb_formats, fmt, flags;
AVFilterFormats *formats = NULL;
while (1) {
nb_formats = 0;
for (fmt = 0;; fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (!desc)
break;
flags = desc->flags;
if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL) &&
!(desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
(desc->log2_chroma_w || desc->log2_chroma_h))
flags |= FF_PIX_FMT_FLAG_SW_FLAT_SUB;
if ((flags & (want | rej)) != want)
continue;
if (formats)
formats->formats[nb_formats] = fmt;
nb_formats++;
}
if (formats) {
av_assert0(formats->nb_formats == nb_formats);
*rfmts = formats;
return 0;
}
formats = av_mallocz(sizeof(*formats));
if (!formats)
return AVERROR(ENOMEM);
formats->nb_formats = nb_formats;
if (nb_formats) {
formats->formats = av_malloc_array(nb_formats, sizeof(*formats->formats));
if (!formats->formats) {
av_freep(&formats);
return AVERROR(ENOMEM);
}
}
}
}
// AVFilterFormats *avfilter_make_all_channel_layouts(void)
// {
// return avfilter_make_format64_list(avfilter_all_channel_layouts);

10
libavfilter/formats.h
View File

@ -221,6 +221,16 @@ int ff_add_format(AVFilterFormats **avff, int64_t fmt);
av_warn_unused_result
AVFilterFormats *ff_all_formats(enum AVMediaType type);
/**
* Construct a formats list containing all pixel formats with certain
* properties
*/
av_warn_unused_result
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej);
//* format is software, non-planar with sub-sampling
#define FF_PIX_FMT_FLAG_SW_FLAT_SUB (1 << 24)
/**
* Construct a formats list containing all planar sample formats.
*/