vf_scale: support named constants for sws flags.
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@ -27,6 +27,7 @@
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#include "libavutil/avstring.h"
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#include "libavutil/eval.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libswscale/swscale.h"
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@ -91,7 +92,15 @@ static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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if (args) {
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sscanf(args, "%255[^:]:%255[^:]", scale->w_expr, scale->h_expr);
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p = strstr(args,"flags=");
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if (p) scale->flags = strtoul(p+6, NULL, 0);
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if (p) {
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const AVClass *class = sws_get_class();
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const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0,
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AV_OPT_SEARCH_FAKE_OBJ);
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int ret = av_opt_eval_flags(&class, o, p + 6, &scale->flags);
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if (ret < 0)
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return ret;
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}
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}
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return 0;
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