278 lines
8.5 KiB
C
278 lines
8.5 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "internal.h"
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typedef struct EPXContext {
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const AVClass *class;
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int n;
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int (*epx_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
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} EPXContext;
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typedef struct ThreadData {
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AVFrame *in, *out;
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} ThreadData;
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#define OFFSET(x) offsetof(EPXContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption epx_options[] = {
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{ "n", "set scale factor", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 3}, 2, 3, .flags = FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(epx);
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static int epx2_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const int slice_start = (in->height * jobnr ) / nb_jobs;
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const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
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for (int p = 0; p < 1; p++) {
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const int width = in->width;
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const int height = in->height;
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const int src_linesize = in->linesize[p] / 4;
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const int dst_linesize = out->linesize[p] / 4;
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const uint32_t *src = (const uint32_t *)in->data[p];
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uint32_t *dst = (uint32_t *)out->data[p];
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const uint32_t *src_line[3];
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src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
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src_line[1] = src + src_linesize * slice_start;
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src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
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for (int y = slice_start; y < slice_end; y++) {
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uint32_t *dst_line[2];
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dst_line[0] = dst + dst_linesize*2*y;
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dst_line[1] = dst + dst_linesize*(2*y+1);
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for (int x = 0; x < width; x++) {
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uint32_t E0, E1, E2, E3;
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uint32_t B, D, E, F, H;
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B = src_line[0][x];
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D = src_line[1][FFMAX(x-1, 0)];
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E = src_line[1][x];
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F = src_line[1][FFMIN(x+1, width - 1)];
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H = src_line[2][x];
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if (B != H && D != F) {
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E0 = D == B ? D : E;
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E1 = B == F ? F : E;
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E2 = D == H ? D : E;
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E3 = H == F ? F : E;
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} else {
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E0 = E;
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E1 = E;
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E2 = E;
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E3 = E;
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}
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dst_line[0][x*2] = E0;
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dst_line[0][x*2+1] = E1;
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dst_line[1][x*2] = E2;
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dst_line[1][x*2+1] = E3;
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}
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src_line[0] = src_line[1];
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src_line[1] = src_line[2];
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src_line[2] = src_line[1];
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if (y < height - 2)
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src_line[2] += src_linesize;
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}
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}
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return 0;
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}
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static int epx3_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
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{
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ThreadData *td = arg;
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const AVFrame *in = td->in;
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AVFrame *out = td->out;
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const int slice_start = (in->height * jobnr ) / nb_jobs;
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const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
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for (int p = 0; p < 1; p++) {
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const int width = in->width;
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const int height = in->height;
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const int src_linesize = in->linesize[p] / 4;
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const int dst_linesize = out->linesize[p] / 4;
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const uint32_t *src = (const uint32_t *)in->data[p];
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uint32_t *dst = (uint32_t *)out->data[p];
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const uint32_t *src_line[3];
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src_line[0] = src + src_linesize * FFMAX(slice_start - 1, 0);
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src_line[1] = src + src_linesize * slice_start;
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src_line[2] = src + src_linesize * FFMIN(slice_start + 1, height-1);
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for (int y = slice_start; y < slice_end; y++) {
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uint32_t *dst_line[3];
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dst_line[0] = dst + dst_linesize*3*y;
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dst_line[1] = dst + dst_linesize*(3*y+1);
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dst_line[2] = dst + dst_linesize*(3*y+2);
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for (int x = 0; x < width; x++) {
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uint32_t E0, E1, E2, E3, E4, E5, E6, E7, E8;
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uint32_t A, B, C, D, E, F, G, H, I;
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A = src_line[0][FFMAX(x-1, 0)];
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B = src_line[0][x];
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C = src_line[0][FFMIN(x+1, width - 1)];
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D = src_line[1][FFMAX(x-1, 0)];
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E = src_line[1][x];
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F = src_line[1][FFMIN(x+1, width - 1)];
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G = src_line[2][FFMAX(x-1, 0)];
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H = src_line[2][x];
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I = src_line[2][FFMIN(x+1, width - 1)];
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if (B != H && D != F) {
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E0 = D == B ? D : E;
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E1 = (D == B && E != C) || (B == F && E != A) ? B : E;
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E2 = B == F ? F : E;
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E3 = (D == B && E != G) || (D == H && E != A) ? D : E;
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E4 = E;
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E5 = (B == F && E != I) || (H == F && E != C) ? F : E;
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E6 = D == H ? D : E;
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E7 = (D == H && E != I) || (H == F && E != G) ? H : E;
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E8 = H == F ? F : E;
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} else {
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E0 = E;
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E1 = E;
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E2 = E;
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E3 = E;
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E4 = E;
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E5 = E;
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E6 = E;
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E7 = E;
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E8 = E;
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}
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dst_line[0][x*3] = E0;
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dst_line[0][x*3+1] = E1;
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dst_line[0][x*3+2] = E2;
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dst_line[1][x*3] = E3;
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dst_line[1][x*3+1] = E4;
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dst_line[1][x*3+2] = E5;
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dst_line[2][x*3] = E6;
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dst_line[2][x*3+1] = E7;
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dst_line[2][x*3+2] = E8;
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}
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src_line[0] = src_line[1];
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src_line[1] = src_line[2];
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src_line[2] = src_line[1];
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if (y < height - 2)
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src_line[2] += src_linesize;
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}
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}
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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EPXContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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const AVPixFmtDescriptor *desc;
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desc = av_pix_fmt_desc_get(outlink->format);
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if (!desc)
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return AVERROR_BUG;
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outlink->w = inlink->w * s->n;
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outlink->h = inlink->h * s->n;
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switch (s->n) {
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case 2:
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s->epx_slice = epx2_slice;
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break;
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case 3:
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s->epx_slice = epx3_slice;
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break;
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}
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return 0;
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}
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
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AV_PIX_FMT_NONE,
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};
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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EPXContext *s = ctx->priv;
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ThreadData td;
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AVFrame *out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!out) {
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av_frame_free(&in);
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return AVERROR(ENOMEM);
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}
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av_frame_copy_props(out, in);
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td.in = in, td.out = out;
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ff_filter_execute(ctx, s->epx_slice, &td, NULL,
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FFMIN(inlink->h, ff_filter_get_nb_threads(ctx)));
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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};
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static const AVFilterPad outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_output,
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},
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};
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const AVFilter ff_vf_epx = {
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.name = "epx",
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.description = NULL_IF_CONFIG_SMALL("Scale the input using EPX algorithm."),
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FILTER_INPUTS(inputs),
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FILTER_OUTPUTS(outputs),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.priv_size = sizeof(EPXContext),
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.priv_class = &epx_class,
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.flags = AVFILTER_FLAG_SLICE_THREADS,
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};
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