mirror of
https://github.com/FFmpeg/FFmpeg.git
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473 lines
20 KiB
C
473 lines
20 KiB
C
/*
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* Copyright (c) 2013 Paul B Mahol
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*
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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 "config_components.h"
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#include "libavutil/eval.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixfmt.h"
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#include "avfilter.h"
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#include "framesync.h"
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#include "internal.h"
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#include "vf_blend_init.h"
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#include "video.h"
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#include "blend.h"
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#define TOP 0
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#define BOTTOM 1
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typedef struct BlendContext {
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const AVClass *class;
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FFFrameSync fs;
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int hsub, vsub; ///< chroma subsampling values
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int nb_planes;
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char *all_expr;
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enum BlendMode all_mode;
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double all_opacity;
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int depth;
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FilterParams params[4];
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int tblend;
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AVFrame *prev_frame; /* only used with tblend */
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} BlendContext;
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static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
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enum { VAR_X, VAR_Y, VAR_W, VAR_H, VAR_SW, VAR_SH, VAR_T, VAR_N, VAR_A, VAR_B, VAR_TOP, VAR_BOTTOM, VAR_VARS_NB };
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typedef struct ThreadData {
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const AVFrame *top, *bottom;
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AVFrame *dst;
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AVFilterLink *inlink;
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int plane;
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int w, h;
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FilterParams *param;
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} ThreadData;
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#define OFFSET(x) offsetof(BlendContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption blend_options[] = {
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{ "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },
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{ "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },
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{ "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },
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{ "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },
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{ "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode" },
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{ "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },
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{ "addition128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },
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{ "grainmerge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },
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{ "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },
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{ "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },
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{ "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },
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{ "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },
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{ "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },
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{ "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },
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{ "grainextract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },
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{ "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },
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{ "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },
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{ "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },
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{ "extremity", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXTREMITY}, 0, 0, FLAGS, "mode" },
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{ "freeze", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE}, 0, 0, FLAGS, "mode" },
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{ "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, "mode" },
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{ "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },
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{ "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, "mode" },
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{ "heat", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT}, 0, 0, FLAGS, "mode" },
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{ "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },
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{ "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },
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{ "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },
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{ "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, "mode" },
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{ "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },
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{ "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },
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{ "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },
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{ "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },
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{ "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },
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{ "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },
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{ "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },
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{ "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },
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{ "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },
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{ "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },
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{ "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },
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{ "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },
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{ "softdifference","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTDIFFERENCE}, 0, 0, FLAGS, "mode" },
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{ "geometric", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GEOMETRIC}, 0, 0, FLAGS, "mode" },
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{ "harmonic", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARMONIC}, 0, 0, FLAGS, "mode" },
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{ "bleach", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BLEACH}, 0, 0, FLAGS, "mode" },
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{ "stain", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_STAIN}, 0, 0, FLAGS, "mode" },
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{ "interpolate","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_INTERPOLATE},0, 0, FLAGS, "mode" },
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{ "hardoverlay","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDOVERLAY},0, 0, FLAGS, "mode" },
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{ "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },
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{ "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },
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{ NULL }
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};
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FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);
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#define DEFINE_BLEND_EXPR(type, name, div) \
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static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
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const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
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uint8_t *_dst, ptrdiff_t dst_linesize, \
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ptrdiff_t width, ptrdiff_t height, \
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FilterParams *param, double *values, int starty) \
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{ \
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const type *top = (const type*)_top; \
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const type *bottom = (const type*)_bottom; \
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type *dst = (type*)_dst; \
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AVExpr *e = param->e; \
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int y, x; \
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dst_linesize /= div; \
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top_linesize /= div; \
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bottom_linesize /= div; \
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\
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for (y = 0; y < height; y++) { \
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values[VAR_Y] = y + starty; \
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for (x = 0; x < width; x++) { \
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values[VAR_X] = x; \
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values[VAR_TOP] = values[VAR_A] = top[x]; \
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values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
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dst[x] = av_expr_eval(e, values, NULL); \
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} \
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dst += dst_linesize; \
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top += top_linesize; \
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bottom += bottom_linesize; \
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} \
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}
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DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
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DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
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DEFINE_BLEND_EXPR(float, 32bit, 4)
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static int filter_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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int slice_start = (td->h * jobnr ) / nb_jobs;
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int slice_end = (td->h * (jobnr+1)) / nb_jobs;
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int height = slice_end - slice_start;
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const uint8_t *top = td->top->data[td->plane];
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const uint8_t *bottom = td->bottom->data[td->plane];
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uint8_t *dst = td->dst->data[td->plane];
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double values[VAR_VARS_NB];
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values[VAR_N] = td->inlink->frame_count_out;
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values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
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values[VAR_W] = td->w;
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values[VAR_H] = td->h;
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values[VAR_SW] = td->w / (double)td->dst->width;
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values[VAR_SH] = td->h / (double)td->dst->height;
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td->param->blend(top + slice_start * td->top->linesize[td->plane],
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td->top->linesize[td->plane],
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bottom + slice_start * td->bottom->linesize[td->plane],
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td->bottom->linesize[td->plane],
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dst + slice_start * td->dst->linesize[td->plane],
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td->dst->linesize[td->plane],
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td->w, height, td->param, &values[0], slice_start);
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return 0;
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}
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static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
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const AVFrame *bottom_buf)
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{
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BlendContext *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *dst_buf;
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int plane;
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dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!dst_buf)
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return top_buf;
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if (av_frame_copy_props(dst_buf, top_buf) < 0) {
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av_frame_free(&dst_buf);
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return top_buf;
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}
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for (plane = 0; plane < s->nb_planes; plane++) {
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int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
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int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
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int outw = AV_CEIL_RSHIFT(dst_buf->width, hsub);
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int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
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FilterParams *param = &s->params[plane];
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ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
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.w = outw, .h = outh, .param = param, .plane = plane,
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.inlink = inlink };
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ff_filter_execute(ctx, filter_slice, &td, NULL,
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FFMIN(outh, ff_filter_get_nb_threads(ctx)));
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}
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if (!s->tblend)
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av_frame_free(&top_buf);
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return dst_buf;
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}
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static int blend_frame_for_dualinput(FFFrameSync *fs)
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{
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AVFilterContext *ctx = fs->parent;
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AVFrame *top_buf, *bottom_buf, *dst_buf;
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int ret;
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ret = ff_framesync_dualinput_get(fs, &top_buf, &bottom_buf);
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if (ret < 0)
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return ret;
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if (!bottom_buf)
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return ff_filter_frame(ctx->outputs[0], top_buf);
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dst_buf = blend_frame(ctx, top_buf, bottom_buf);
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return ff_filter_frame(ctx->outputs[0], dst_buf);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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BlendContext *s = ctx->priv;
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s->tblend = !strcmp(ctx->filter->name, "tblend");
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s->fs.on_event = blend_frame_for_dualinput;
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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_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GRAY9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, AV_PIX_FMT_GBRP14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_GRAYF32,
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AV_PIX_FMT_NONE
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};
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static av_cold void uninit(AVFilterContext *ctx)
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{
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BlendContext *s = ctx->priv;
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int i;
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ff_framesync_uninit(&s->fs);
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av_frame_free(&s->prev_frame);
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for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
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av_expr_free(s->params[i].e);
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}
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static int config_params(AVFilterContext *ctx)
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{
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BlendContext *s = ctx->priv;
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int ret;
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for (int plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
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FilterParams *param = &s->params[plane];
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if (s->all_mode >= 0)
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param->mode = s->all_mode;
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if (s->all_opacity < 1)
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param->opacity = s->all_opacity;
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ff_blend_init(param, s->depth);
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if (s->all_expr && !param->expr_str) {
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param->expr_str = av_strdup(s->all_expr);
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if (!param->expr_str)
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return AVERROR(ENOMEM);
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}
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if (param->expr_str) {
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ret = av_expr_parse(¶m->e, param->expr_str, var_names,
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NULL, NULL, NULL, NULL, 0, ctx);
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if (ret < 0)
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return ret;
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param->blend = s->depth > 8 ? s->depth > 16 ? blend_expr_32bit : blend_expr_16bit : blend_expr_8bit;
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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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AVFilterLink *toplink = ctx->inputs[TOP];
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BlendContext *s = ctx->priv;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
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int ret;
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if (!s->tblend) {
|
|
AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
|
|
|
|
if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {
|
|
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
|
|
"(size %dx%d) do not match the corresponding "
|
|
"second input link %s parameters (size %dx%d)\n",
|
|
ctx->input_pads[TOP].name, toplink->w, toplink->h,
|
|
ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
}
|
|
|
|
outlink->w = toplink->w;
|
|
outlink->h = toplink->h;
|
|
outlink->time_base = toplink->time_base;
|
|
outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
|
|
outlink->frame_rate = toplink->frame_rate;
|
|
|
|
s->hsub = pix_desc->log2_chroma_w;
|
|
s->vsub = pix_desc->log2_chroma_h;
|
|
|
|
s->depth = pix_desc->comp[0].depth;
|
|
s->nb_planes = av_pix_fmt_count_planes(toplink->format);
|
|
|
|
if (!s->tblend)
|
|
if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
|
|
return ret;
|
|
|
|
ret = config_params(ctx);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (s->tblend)
|
|
return 0;
|
|
|
|
ret = ff_framesync_configure(&s->fs);
|
|
outlink->time_base = s->fs.time_base;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
|
|
char *res, int res_len, int flags)
|
|
{
|
|
int ret;
|
|
|
|
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return config_params(ctx);
|
|
}
|
|
|
|
static const AVFilterPad blend_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
},
|
|
};
|
|
|
|
#if CONFIG_BLEND_FILTER
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
BlendContext *s = ctx->priv;
|
|
return ff_framesync_activate(&s->fs);
|
|
}
|
|
|
|
static const AVFilterPad blend_inputs[] = {
|
|
{
|
|
.name = "top",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},{
|
|
.name = "bottom",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_blend = {
|
|
.name = "blend",
|
|
.description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
|
|
.preinit = blend_framesync_preinit,
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(BlendContext),
|
|
.activate = activate,
|
|
FILTER_INPUTS(blend_inputs),
|
|
FILTER_OUTPUTS(blend_outputs),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.priv_class = &blend_class,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
|
|
.process_command = process_command,
|
|
};
|
|
|
|
#endif
|
|
|
|
#if CONFIG_TBLEND_FILTER
|
|
|
|
static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BlendContext *s = ctx->priv;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
|
|
if (s->prev_frame) {
|
|
AVFrame *out;
|
|
|
|
if (ctx->is_disabled)
|
|
out = av_frame_clone(frame);
|
|
else
|
|
out = blend_frame(ctx, frame, s->prev_frame);
|
|
av_frame_free(&s->prev_frame);
|
|
s->prev_frame = frame;
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
s->prev_frame = frame;
|
|
return 0;
|
|
}
|
|
|
|
AVFILTER_DEFINE_CLASS_EXT(tblend, "tblend", blend_options);
|
|
|
|
static const AVFilterPad tblend_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = tblend_filter_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_tblend = {
|
|
.name = "tblend",
|
|
.description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
|
|
.priv_size = sizeof(BlendContext),
|
|
.priv_class = &tblend_class,
|
|
.init = init,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(tblend_inputs),
|
|
FILTER_OUTPUTS(blend_outputs),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
|
|
.process_command = process_command,
|
|
};
|
|
|
|
#endif
|