mirror of https://git.ffmpeg.org/ffmpeg.git
vf_aspect: switch to an AVOptions-based system.
This commit is contained in:
Anton Khirnov
parent
e67a87eac8
commit
2831b307e6
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@ -1834,18 +1834,20 @@ the video frame. Also the display aspect ratio set by this filter may
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be changed by later filters in the filterchain, e.g. in case of
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scaling or if another "setdar" or a "setsar" filter is applied.
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The filter accepts a parameter string which represents the wanted
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display aspect ratio.
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The parameter can be a floating point number string, or an expression
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of the form @var{num}:@var{den}, where @var{num} and @var{den} are the
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numerator and denominator of the aspect ratio.
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If the parameter is not specified, it is assumed the value "0:1".
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This filter accepts the following options:
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@table @option
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@item dar
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Output display aspect ratio, as a rational or a decimal number.
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@end table
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For example to change the display aspect ratio to 16:9, specify:
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@example
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setdar=16:9
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setdar=dar=16/9
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# the above is equivalent to
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setdar=1.77777
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setdar=dar=1.77777
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@end example
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See also the @ref{setsar} filter documentation.
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@ -1929,16 +1931,18 @@ Keep in mind that the sample aspect ratio set by this filter may be
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changed by later filters in the filterchain, e.g. if another "setsar"
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or a "setdar" filter is applied.
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The filter accepts a parameter string which represents the wanted
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sample aspect ratio.
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The parameter can be a floating point number string, or an expression
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of the form @var{num}:@var{den}, where @var{num} and @var{den} are the
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numerator and denominator of the aspect ratio.
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If the parameter is not specified, it is assumed the value "0:1".
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This filter accepts the following options:
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@table @option
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@item sar
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Output sample aspect ratio, as a rational or decimal number.
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@end table
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For example to change the sample aspect ratio to 10:11, specify:
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@example
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setsar=10:11
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setsar=sar=10/11
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@end example
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@section settb
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@ -23,47 +23,38 @@
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* aspect ratio modification video filters
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*/
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#include <float.h>
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#include "libavutil/common.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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typedef struct {
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const AVClass *class;
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AVRational aspect;
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#if FF_API_OLD_FILTER_OPTS
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float aspect_num, aspect_den;
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#endif
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} AspectContext;
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#if FF_API_OLD_FILTER_OPTS
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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AspectContext *aspect = ctx->priv;
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double ratio;
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int64_t gcd;
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char c = 0;
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AspectContext *s = ctx->priv;
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if (args) {
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if (sscanf(args, "%d:%d%c", &aspect->aspect.num, &aspect->aspect.den, &c) != 2)
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if (sscanf(args, "%lf%c", &ratio, &c) == 1)
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aspect->aspect = av_d2q(ratio, 100);
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if (c || aspect->aspect.num <= 0 || aspect->aspect.den <= 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid string '%s' for aspect ratio.\n", args);
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return AVERROR(EINVAL);
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}
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gcd = av_gcd(FFABS(aspect->aspect.num), FFABS(aspect->aspect.den));
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if (gcd) {
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aspect->aspect.num /= gcd;
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aspect->aspect.den /= gcd;
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}
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if (s->aspect_num > 0 && s->aspect_den > 0) {
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av_log(ctx, AV_LOG_WARNING, "This syntax is deprecated, use "
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"dar=<number> or dar=num/den.\n");
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s->aspect = av_d2q(s->aspect_num / s->aspect_den, INT_MAX);
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}
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if (aspect->aspect.den == 0)
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aspect->aspect = (AVRational) {0, 1};
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av_log(ctx, AV_LOG_VERBOSE, "a:%d/%d\n", aspect->aspect.num, aspect->aspect.den);
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return 0;
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}
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#endif
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static int filter_frame(AVFilterLink *link, AVFrame *frame)
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{
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@ -73,6 +64,9 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
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return ff_filter_frame(link->dst->outputs[0], frame);
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}
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#define OFFSET(x) offsetof(AspectContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM
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#if CONFIG_SETDAR_FILTER
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/* for setdar filter, convert from frame aspect ratio to pixel aspect ratio */
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static int setdar_config_props(AVFilterLink *inlink)
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@ -80,18 +74,39 @@ static int setdar_config_props(AVFilterLink *inlink)
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AspectContext *aspect = inlink->dst->priv;
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AVRational dar = aspect->aspect;
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av_reduce(&aspect->aspect.num, &aspect->aspect.den,
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aspect->aspect.num * inlink->h,
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aspect->aspect.den * inlink->w, 100);
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if (aspect->aspect.num && aspect->aspect.den) {
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av_reduce(&aspect->aspect.num, &aspect->aspect.den,
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aspect->aspect.num * inlink->h,
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aspect->aspect.den * inlink->w, 100);
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inlink->sample_aspect_ratio = aspect->aspect;
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} else {
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inlink->sample_aspect_ratio = (AVRational){ 1, 1 };
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dar = (AVRational){ inlink->w, inlink->h };
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}
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av_log(inlink->dst, AV_LOG_VERBOSE, "w:%d h:%d -> dar:%d/%d sar:%d/%d\n",
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inlink->w, inlink->h, dar.num, dar.den, aspect->aspect.num, aspect->aspect.den);
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inlink->sample_aspect_ratio = aspect->aspect;
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inlink->w, inlink->h, dar.num, dar.den,
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inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den);
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return 0;
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}
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static const AVOption setdar_options[] = {
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#if FF_API_OLD_FILTER_OPTS
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{ "dar_num", NULL, OFFSET(aspect_num), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
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{ "dar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
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#endif
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{ "dar", "display aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, FLAGS },
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{ NULL },
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};
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static const AVClass setdar_class = {
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.class_name = "setdar",
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.item_name = av_default_item_name,
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.option = setdar_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad avfilter_vf_setdar_inputs[] = {
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{
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.name = "default",
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@ -115,9 +130,12 @@ AVFilter avfilter_vf_setdar = {
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.name = "setdar",
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.description = NULL_IF_CONFIG_SMALL("Set the frame display aspect ratio."),
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#if FF_API_OLD_FILTER_OPTS
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.init = init,
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#endif
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.priv_size = sizeof(AspectContext),
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.priv_class = &setdar_class,
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.inputs = avfilter_vf_setdar_inputs,
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@ -136,6 +154,22 @@ static int setsar_config_props(AVFilterLink *inlink)
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return 0;
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}
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static const AVOption setsar_options[] = {
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#if FF_API_OLD_FILTER_OPTS
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{ "sar_num", NULL, OFFSET(aspect_num), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
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{ "sar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS },
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#endif
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{ "sar", "sample (pixel) aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 1 }, 0, INT_MAX, FLAGS },
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{ NULL },
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};
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static const AVClass setsar_class = {
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.class_name = "setsar",
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.item_name = av_default_item_name,
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.option = setsar_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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static const AVFilterPad avfilter_vf_setsar_inputs[] = {
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{
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.name = "default",
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@ -159,9 +193,12 @@ AVFilter avfilter_vf_setsar = {
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.name = "setsar",
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.description = NULL_IF_CONFIG_SMALL("Set the pixel sample aspect ratio."),
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#if FF_API_OLD_FILTER_OPTS
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.init = init,
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#endif
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.priv_size = sizeof(AspectContext),
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.priv_class = &setsar_class,
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.inputs = avfilter_vf_setsar_inputs,
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