mirror of https://github.com/mpv-player/mpv
100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "vf_dlopen.h"
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/*
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* qscale visualizer
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*
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* usage: -vf dlopen=./showqscale.so
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*
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* uses reddish colors for high QPs, and greenish colors for low QPs
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*/
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#define PLANE_Y 0
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#define PLANE_U 1
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#define PLANE_V 2
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static int qs_put_image(struct vf_dlopen_context *ctx)
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{
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unsigned int x, y, p;
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assert(ctx->inpic.planes == ctx->outpic[0].planes);
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for (p = 0; p < ctx->outpic[0].planes; ++p) {
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assert(ctx->inpic.planewidth[p] == ctx->outpic[0].planewidth[p]);
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assert(ctx->inpic.planeheight[p] == ctx->outpic[0].planeheight[p]);
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if ((p == PLANE_U || p == PLANE_V) && ctx->inpic_qscale)
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continue;
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#if 0
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// copy as is
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for (y = 0; y < ctx->outpic[0].planeheight[p]; ++y)
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memcpy(
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&ctx->outpic[0].plane[p][ctx->outpic[0].planestride[p] * y],
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&inpic[ctx->outpic[0].planeofs[p] + ctx->inpic.planestride[p] * y],
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ctx->outpic[0].planewidth[p]
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);
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#else
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// reduce contrast
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for (y = 0; y < ctx->outpic[0].planeheight[p]; ++y)
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for (x = 0; x < ctx->outpic[0].planewidth[p]; ++x)
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ctx->outpic[0].plane[p][ctx->outpic[0].planestride[p] * y + x] =
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0x20 + ((ctx->inpic.plane[p][ctx->inpic.planestride[p] * y + x] * 3) >> 2);
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#endif
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}
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if (ctx->inpic_qscale) {
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int qmin = 255;
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int qmax = -255;
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// clear U plane
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p = PLANE_U;
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for (y = 0; y < ctx->outpic[0].planeheight[p]; ++y)
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memset(
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&ctx->outpic[0].plane[p][ctx->outpic[0].planestride[p] * y],
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0x80,
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ctx->outpic[0].planewidth[p]
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);
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// replace V by the qp (0 = green, 12 = red)
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p = PLANE_V;
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for (y = 0; y < ctx->outpic[0].planeheight[p]; ++y)
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for (x = 0; x < ctx->outpic[0].planewidth[p]; ++x) {
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int q = ctx->inpic_qscale[
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(x >> (ctx->inpic_qscaleshift - ctx->inpic.planexshift[p])) +
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(y >> (ctx->inpic_qscaleshift - ctx->inpic.planeyshift[p])) * ctx->inpic_qscalestride];
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if (q < qmin)
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qmin = q;
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if (q > qmax)
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qmax = q;
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int v = 128 + 21 * (q - 6); // range: 0 = green, 12 = red
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if (v < 0)
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v = 0;
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if (v > 255)
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v = 255;
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ctx->outpic[0].plane[p][ctx->outpic[0].planestride[p] * y + x] = v;
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}
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// printf("qscale range: %d .. %d\n", qmin, qmax);
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}
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ctx->outpic[0].pts = ctx->inpic.pts;
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return 1;
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}
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int vf_dlopen_getcontext(struct vf_dlopen_context *ctx, int argc, const char **argv)
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{
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VF_DLOPEN_CHECK_VERSION(ctx);
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(void) argc;
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(void) argv;
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static struct vf_dlopen_formatpair map[] = {
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{ "yv12", "yv12" },
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{ NULL, NULL }
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};
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ctx->format_mapping = map;
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ctx->put_image = qs_put_image;
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return 1;
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}
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