mirror of
https://github.com/FFmpeg/FFmpeg.git
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464 lines
19 KiB
C
464 lines
19 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 "libavutil/imgutils.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 "bufferqueue.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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#define TOP 0
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#define BOTTOM 1
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enum BlendMode {
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BLEND_UNSET = -1,
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BLEND_NORMAL,
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BLEND_ADDITION,
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BLEND_AND,
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BLEND_AVERAGE,
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BLEND_BURN,
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BLEND_DARKEN,
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BLEND_DIFFERENCE,
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BLEND_DIVIDE,
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BLEND_DODGE,
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BLEND_EXCLUSION,
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BLEND_HARDLIGHT,
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BLEND_LIGHTEN,
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BLEND_MULTIPLY,
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BLEND_NEGATION,
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BLEND_OR,
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BLEND_OVERLAY,
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BLEND_PHOENIX,
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BLEND_PINLIGHT,
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BLEND_REFLECT,
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BLEND_SCREEN,
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BLEND_SOFTLIGHT,
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BLEND_SUBTRACT,
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BLEND_VIVIDLIGHT,
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BLEND_XOR,
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BLEND_NB
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};
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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 FilterParams {
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enum BlendMode mode;
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double values[VAR_VARS_NB];
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double opacity;
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AVExpr *e;
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char *expr_str;
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void (*blend)(const uint8_t *top, int top_linesize,
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const uint8_t *bottom, int bottom_linesize,
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uint8_t *dst, int dst_linesize,
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int width, int height, struct FilterParams *param);
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} FilterParams;
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typedef struct {
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const AVClass *class;
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struct FFBufQueue queue_top;
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struct FFBufQueue queue_bottom;
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int hsub, vsub; ///< chroma subsampling values
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int nb_planes;
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int frame_requested;
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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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FilterParams params[4];
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} BlendContext;
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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
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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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{ "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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{ "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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{ "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 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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{ "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 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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{ "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },
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{ "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, 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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AVFILTER_DEFINE_CLASS(blend);
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static void blend_normal(const uint8_t *top, int top_linesize,
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const uint8_t *bottom, int bottom_linesize,
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uint8_t *dst, int dst_linesize,
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int width, int height, FilterParams *param)
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{
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av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, height);
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}
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#define DEFINE_BLEND(name, expr) \
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static void blend_## name(const uint8_t *top, int top_linesize, \
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const uint8_t *bottom, int bottom_linesize, \
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uint8_t *dst, int dst_linesize, \
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int width, int height, FilterParams *param) \
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{ \
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double opacity = param->opacity; \
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int i, j; \
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\
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for (i = 0; i < height; i++) { \
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for (j = 0; j < width; j++) { \
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dst[j] = top[j] + ((expr) - top[j]) * opacity; \
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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 A top[j]
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#define B bottom[j]
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#define MULTIPLY(x, a, b) (x * ((a * b) / 255))
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#define SCREEN(x, a, b) (255 - x * ((255 - a) * (255 - b) / 255))
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#define BURN(a, b) ((a == 0) ? a : FFMAX(0, 255 - ((255 - b) << 8) / a))
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#define DODGE(a, b) ((a == 255) ? a : FFMIN(255, ((b << 8) / (255 - a))))
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DEFINE_BLEND(addition, FFMIN(255, A + B))
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DEFINE_BLEND(average, (A + B) / 2)
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DEFINE_BLEND(subtract, FFMAX(0, A - B))
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DEFINE_BLEND(multiply, MULTIPLY(1, A, B))
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DEFINE_BLEND(negation, 255 - FFABS(255 - A - B))
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DEFINE_BLEND(difference, FFABS(A - B))
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DEFINE_BLEND(screen, SCREEN(1, A, B))
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DEFINE_BLEND(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
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DEFINE_BLEND(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
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DEFINE_BLEND(darken, FFMIN(A, B))
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DEFINE_BLEND(lighten, FFMAX(A, B))
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DEFINE_BLEND(divide, ((float)A / ((float)B) * 255))
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DEFINE_BLEND(dodge, DODGE(A, B))
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DEFINE_BLEND(burn, BURN(A, B))
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DEFINE_BLEND(softlight, (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - FFABS(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - FFABS(B - 127.5)/255))
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DEFINE_BLEND(exclusion, A + B - 2 * A * B / 255)
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DEFINE_BLEND(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
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DEFINE_BLEND(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
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DEFINE_BLEND(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
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DEFINE_BLEND(and, A & B)
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DEFINE_BLEND(or, A | B)
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DEFINE_BLEND(xor, A ^ B)
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DEFINE_BLEND(vividlight, (B < 128) ? BURN(A, 2 * B) : DODGE(A, 2 * (B - 128)))
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static void blend_expr(const uint8_t *top, int top_linesize,
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const uint8_t *bottom, int bottom_linesize,
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uint8_t *dst, int dst_linesize,
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int width, int height,
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FilterParams *param)
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{
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AVExpr *e = param->e;
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double *values = param->values;
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int y, x;
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for (y = 0; y < height; y++) {
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values[VAR_Y] = y;
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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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static av_cold int init(AVFilterContext *ctx)
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{
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BlendContext *b = ctx->priv;
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int ret, plane;
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for (plane = 0; plane < FF_ARRAY_ELEMS(b->params); plane++) {
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FilterParams *param = &b->params[plane];
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if (b->all_mode >= 0)
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param->mode = b->all_mode;
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if (b->all_opacity < 1)
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param->opacity = b->all_opacity;
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switch (param->mode) {
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case BLEND_ADDITION: param->blend = blend_addition; break;
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case BLEND_AND: param->blend = blend_and; break;
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case BLEND_AVERAGE: param->blend = blend_average; break;
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case BLEND_BURN: param->blend = blend_burn; break;
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case BLEND_DARKEN: param->blend = blend_darken; break;
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case BLEND_DIFFERENCE: param->blend = blend_difference; break;
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case BLEND_DIVIDE: param->blend = blend_divide; break;
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case BLEND_DODGE: param->blend = blend_dodge; break;
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case BLEND_EXCLUSION: param->blend = blend_exclusion; break;
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case BLEND_HARDLIGHT: param->blend = blend_hardlight; break;
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case BLEND_LIGHTEN: param->blend = blend_lighten; break;
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case BLEND_MULTIPLY: param->blend = blend_multiply; break;
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case BLEND_NEGATION: param->blend = blend_negation; break;
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case BLEND_NORMAL: param->blend = blend_normal; break;
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case BLEND_OR: param->blend = blend_or; break;
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case BLEND_OVERLAY: param->blend = blend_overlay; break;
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case BLEND_PHOENIX: param->blend = blend_phoenix; break;
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case BLEND_PINLIGHT: param->blend = blend_pinlight; break;
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case BLEND_REFLECT: param->blend = blend_reflect; break;
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case BLEND_SCREEN: param->blend = blend_screen; break;
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case BLEND_SOFTLIGHT: param->blend = blend_softlight; break;
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case BLEND_SUBTRACT: param->blend = blend_subtract; break;
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case BLEND_VIVIDLIGHT: param->blend = blend_vividlight; break;
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case BLEND_XOR: param->blend = blend_xor; break;
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}
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if (b->all_expr && !param->expr_str) {
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param->expr_str = av_strdup(b->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 = blend_expr;
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}
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}
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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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,
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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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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AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
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BlendContext *b = ctx->priv;
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
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if (toplink->format != bottomlink->format) {
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av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
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return AVERROR(EINVAL);
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}
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if (toplink->w != bottomlink->w ||
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toplink->h != bottomlink->h ||
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toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
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toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
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av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
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"(size %dx%d, SAR %d:%d) do not match the corresponding "
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"second input link %s parameters (%dx%d, SAR %d:%d)\n",
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ctx->input_pads[TOP].name, toplink->w, toplink->h,
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toplink->sample_aspect_ratio.num,
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toplink->sample_aspect_ratio.den,
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ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
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bottomlink->sample_aspect_ratio.num,
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bottomlink->sample_aspect_ratio.den);
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return AVERROR(EINVAL);
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}
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outlink->w = toplink->w;
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outlink->h = toplink->h;
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outlink->time_base = toplink->time_base;
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outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
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outlink->frame_rate = toplink->frame_rate;
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b->hsub = pix_desc->log2_chroma_w;
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b->vsub = pix_desc->log2_chroma_h;
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b->nb_planes = av_pix_fmt_count_planes(toplink->format);
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return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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BlendContext *b = ctx->priv;
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int i;
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ff_bufqueue_discard_all(&b->queue_top);
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ff_bufqueue_discard_all(&b->queue_bottom);
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for (i = 0; i < FF_ARRAY_ELEMS(b->params); i++)
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av_expr_free(b->params[i].e);
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}
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static int request_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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BlendContext *b = ctx->priv;
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int in, ret;
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b->frame_requested = 1;
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while (b->frame_requested) {
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in = ff_bufqueue_peek(&b->queue_top, 0) ? BOTTOM : TOP;
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ret = ff_request_frame(ctx->inputs[in]);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static void blend_frame(AVFilterContext *ctx,
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AVFrame *top_buf,
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AVFrame *bottom_buf,
|
|
AVFrame *dst_buf)
|
|
{
|
|
BlendContext *b = ctx->priv;
|
|
AVFilterLink *inlink = ctx->inputs[0];
|
|
FilterParams *param;
|
|
int plane;
|
|
|
|
for (plane = 0; plane < b->nb_planes; plane++) {
|
|
int hsub = plane == 1 || plane == 2 ? b->hsub : 0;
|
|
int vsub = plane == 1 || plane == 2 ? b->vsub : 0;
|
|
int outw = dst_buf->width >> hsub;
|
|
int outh = dst_buf->height >> vsub;
|
|
uint8_t *dst = dst_buf->data[plane];
|
|
uint8_t *top = top_buf->data[plane];
|
|
uint8_t *bottom = bottom_buf->data[plane];
|
|
|
|
param = &b->params[plane];
|
|
param->values[VAR_N] = inlink->frame_count;
|
|
param->values[VAR_T] = dst_buf->pts == AV_NOPTS_VALUE ? NAN : dst_buf->pts * av_q2d(inlink->time_base);
|
|
param->values[VAR_W] = outw;
|
|
param->values[VAR_H] = outh;
|
|
param->values[VAR_SW] = outw / dst_buf->width;
|
|
param->values[VAR_SH] = outh / dst_buf->height;
|
|
param->blend(top, top_buf->linesize[plane],
|
|
bottom, bottom_buf->linesize[plane],
|
|
dst, dst_buf->linesize[plane], outw, outh, param);
|
|
}
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
BlendContext *b = ctx->priv;
|
|
|
|
int ret = 0;
|
|
int is_bottom = (inlink == ctx->inputs[BOTTOM]);
|
|
struct FFBufQueue *queue =
|
|
(is_bottom ? &b->queue_bottom : &b->queue_top);
|
|
ff_bufqueue_add(ctx, queue, buf);
|
|
|
|
while (1) {
|
|
AVFrame *top_buf, *bottom_buf, *out_buf;
|
|
|
|
if (!ff_bufqueue_peek(&b->queue_top, 0) ||
|
|
!ff_bufqueue_peek(&b->queue_bottom, 0)) break;
|
|
|
|
top_buf = ff_bufqueue_get(&b->queue_top);
|
|
bottom_buf = ff_bufqueue_get(&b->queue_bottom);
|
|
|
|
out_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out_buf) {
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out_buf, top_buf);
|
|
|
|
b->frame_requested = 0;
|
|
blend_frame(ctx, top_buf, bottom_buf, out_buf);
|
|
ret = ff_filter_frame(outlink, out_buf);
|
|
av_frame_free(&top_buf);
|
|
av_frame_free(&bottom_buf);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static const AVFilterPad blend_inputs[] = {
|
|
{
|
|
.name = "top",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},{
|
|
.name = "bottom",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad blend_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter avfilter_vf_blend = {
|
|
.name = "blend",
|
|
.description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
|
|
.init = init,
|
|
.uninit = uninit,
|
|
.priv_size = sizeof(BlendContext),
|
|
.query_formats = query_formats,
|
|
.inputs = blend_inputs,
|
|
.outputs = blend_outputs,
|
|
.priv_class = &blend_class,
|
|
};
|