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avfilter/vf_scale: add ov/hsub

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Suggested-by: divVerent
Reviewed-by: Stefano
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-11-04 14:18:09 +01:00
parent fb10b43fc4
commit d0ac60730d
3 changed files with 14 additions and 2 deletions
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7
doc/filters.texi
View File

@ -6820,7 +6820,12 @@ input display aspect ratio. Calculated from @code{(iw / ih) * sar}.
@item hsub
@item vsub
horizontal and vertical chroma subsample values. For example for the
horizontal and vertical input chroma subsample values. For example for the
pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.
@item ohsub
@item ovsub
horizontal and vertical output chroma subsample values. For example for the
pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.
@end table

2
libavfilter/version.h
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@ -31,7 +31,7 @@
#define LIBAVFILTER_VERSION_MAJOR 3
#define LIBAVFILTER_VERSION_MINOR 90
#define LIBAVFILTER_VERSION_MICRO 100
#define LIBAVFILTER_VERSION_MICRO 101
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \

7
libavfilter/vf_scale.c
View File

@ -51,6 +51,8 @@ static const char *const var_names[] = {
"dar",
"hsub",
"vsub",
"ohsub",
"ovsub",
NULL
};
@ -64,6 +66,8 @@ enum var_name {
VAR_DAR,
VAR_HSUB,
VAR_VSUB,
VAR_OHSUB,
VAR_OVSUB,
VARS_NB
};
@ -227,6 +231,7 @@ static int config_props(AVFilterLink *outlink)
enum AVPixelFormat outfmt = outlink->format;
ScaleContext *scale = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format);
int64_t w, h;
double var_values[VARS_NB], res;
char *expr;
@ -242,6 +247,8 @@ static int config_props(AVFilterLink *outlink)
var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR];
var_values[VAR_HSUB] = 1 << desc->log2_chroma_w;
var_values[VAR_VSUB] = 1 << desc->log2_chroma_h;
var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w;
var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h;
/* evaluate width and height */
av_expr_parse_and_eval(&res, (expr = scale->w_expr),