LCOV - code coverage report
Current view: top level - libavfilter - vf_blend.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 129 258 50.0 %
Date: 2017-12-11 04:34:20 Functions: 25 83 30.1 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2013 Paul B Mahol
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "libavutil/imgutils.h"
      22             : #include "libavutil/eval.h"
      23             : #include "libavutil/opt.h"
      24             : #include "libavutil/pixfmt.h"
      25             : #include "avfilter.h"
      26             : #include "bufferqueue.h"
      27             : #include "formats.h"
      28             : #include "framesync.h"
      29             : #include "internal.h"
      30             : #include "video.h"
      31             : #include "blend.h"
      32             : 
      33             : #define TOP    0
      34             : #define BOTTOM 1
      35             : 
      36             : typedef struct BlendContext {
      37             :     const AVClass *class;
      38             :     FFFrameSync fs;
      39             :     int hsub, vsub;             ///< chroma subsampling values
      40             :     int nb_planes;
      41             :     char *all_expr;
      42             :     enum BlendMode all_mode;
      43             :     double all_opacity;
      44             : 
      45             :     FilterParams params[4];
      46             :     int tblend;
      47             :     AVFrame *prev_frame;        /* only used with tblend */
      48             : } BlendContext;
      49             : 
      50             : static const char *const var_names[] = {   "X",   "Y",   "W",   "H",   "SW",   "SH",   "T",   "N",   "A",   "B",   "TOP",   "BOTTOM",        NULL };
      51             : 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 };
      52             : 
      53             : typedef struct ThreadData {
      54             :     const AVFrame *top, *bottom;
      55             :     AVFrame *dst;
      56             :     AVFilterLink *inlink;
      57             :     int plane;
      58             :     int w, h;
      59             :     FilterParams *param;
      60             : } ThreadData;
      61             : 
      62             : #define COMMON_OPTIONS \
      63             :     { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
      64             :     { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
      65             :     { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
      66             :     { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
      67             :     { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},\
      68             :     { "addition",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION},   0, 0, FLAGS, "mode" },\
      69             :     { "addition128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },\
      70             :     { "grainmerge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },\
      71             :     { "and",        "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND},        0, 0, FLAGS, "mode" },\
      72             :     { "average",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE},    0, 0, FLAGS, "mode" },\
      73             :     { "burn",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN},       0, 0, FLAGS, "mode" },\
      74             :     { "darken",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN},     0, 0, FLAGS, "mode" },\
      75             :     { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },\
      76             :     { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },\
      77             :     { "grainextract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },\
      78             :     { "divide",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE},     0, 0, FLAGS, "mode" },\
      79             :     { "dodge",      "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE},      0, 0, FLAGS, "mode" },\
      80             :     { "exclusion",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION},  0, 0, FLAGS, "mode" },\
      81             :     { "extremity",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXTREMITY},  0, 0, FLAGS, "mode" },\
      82             :     { "freeze",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE},     0, 0, FLAGS, "mode" },\
      83             :     { "glow",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW},       0, 0, FLAGS, "mode" },\
      84             :     { "hardlight",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT},  0, 0, FLAGS, "mode" },\
      85             :     { "hardmix",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX},    0, 0, FLAGS, "mode" },\
      86             :     { "heat",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT},       0, 0, FLAGS, "mode" },\
      87             :     { "lighten",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN},    0, 0, FLAGS, "mode" },\
      88             :     { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
      89             :     { "multiply",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY},   0, 0, FLAGS, "mode" },\
      90             :     { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, "mode" },\
      91             :     { "negation",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION},   0, 0, FLAGS, "mode" },\
      92             :     { "normal",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL},     0, 0, FLAGS, "mode" },\
      93             :     { "or",         "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR},         0, 0, FLAGS, "mode" },\
      94             :     { "overlay",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY},    0, 0, FLAGS, "mode" },\
      95             :     { "phoenix",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX},    0, 0, FLAGS, "mode" },\
      96             :     { "pinlight",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT},   0, 0, FLAGS, "mode" },\
      97             :     { "reflect",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT},    0, 0, FLAGS, "mode" },\
      98             :     { "screen",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN},     0, 0, FLAGS, "mode" },\
      99             :     { "softlight",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT},  0, 0, FLAGS, "mode" },\
     100             :     { "subtract",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT},   0, 0, FLAGS, "mode" },\
     101             :     { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
     102             :     { "xor",        "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR},        0, 0, FLAGS, "mode" },\
     103             :     { "c0_expr",  "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
     104             :     { "c1_expr",  "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
     105             :     { "c2_expr",  "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
     106             :     { "c3_expr",  "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
     107             :     { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
     108             :     { "c0_opacity",  "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
     109             :     { "c1_opacity",  "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
     110             :     { "c2_opacity",  "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
     111             :     { "c3_opacity",  "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
     112             :     { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
     113             : 
     114             : #define OFFSET(x) offsetof(BlendContext, x)
     115             : #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
     116             : 
     117             : static const AVOption blend_options[] = {
     118             :     COMMON_OPTIONS,
     119             :     { NULL }
     120             : };
     121             : 
     122           0 : FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);
     123             : 
     124             : #define COPY(src)                                                            \
     125             : static void blend_copy ## src(const uint8_t *top, ptrdiff_t top_linesize,    \
     126             :                             const uint8_t *bottom, ptrdiff_t bottom_linesize,\
     127             :                             uint8_t *dst, ptrdiff_t dst_linesize,            \
     128             :                             ptrdiff_t width, ptrdiff_t height,               \
     129             :                             FilterParams *param, double *values, int starty) \
     130             : {                                                                            \
     131             :     av_image_copy_plane(dst, dst_linesize, src, src ## _linesize,            \
     132             :                         width, height);                                 \
     133             : }
     134             : 
     135           0 : COPY(top)
     136           0 : COPY(bottom)
     137             : 
     138             : #undef COPY
     139             : 
     140           0 : static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
     141             :                               const uint8_t *bottom, ptrdiff_t bottom_linesize,
     142             :                               uint8_t *dst, ptrdiff_t dst_linesize,
     143             :                               ptrdiff_t width, ptrdiff_t height,
     144             :                               FilterParams *param, double *values, int starty)
     145             : {
     146           0 :     const double opacity = param->opacity;
     147             :     int i, j;
     148             : 
     149           0 :     for (i = 0; i < height; i++) {
     150           0 :         for (j = 0; j < width; j++) {
     151           0 :             dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
     152             :         }
     153           0 :         dst    += dst_linesize;
     154           0 :         top    += top_linesize;
     155           0 :         bottom += bottom_linesize;
     156             :     }
     157           0 : }
     158             : 
     159           0 : static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
     160             :                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize,
     161             :                                   uint8_t *_dst, ptrdiff_t dst_linesize,
     162             :                                   ptrdiff_t width, ptrdiff_t height,
     163             :                                   FilterParams *param, double *values, int starty)
     164             : {
     165           0 :     const uint16_t *top = (uint16_t*)_top;
     166           0 :     const uint16_t *bottom = (uint16_t*)_bottom;
     167           0 :     uint16_t *dst = (uint16_t*)_dst;
     168           0 :     const double opacity = param->opacity;
     169             :     int i, j;
     170           0 :     dst_linesize /= 2;
     171           0 :     top_linesize /= 2;
     172           0 :     bottom_linesize /= 2;
     173             : 
     174           0 :     for (i = 0; i < height; i++) {
     175           0 :         for (j = 0; j < width; j++) {
     176           0 :             dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
     177             :         }
     178           0 :         dst    += dst_linesize;
     179           0 :         top    += top_linesize;
     180           0 :         bottom += bottom_linesize;
     181             :     }
     182           0 : }
     183             : 
     184             : #define DEFINE_BLEND8(name, expr)                                              \
     185             : static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize,         \
     186             :                                  const uint8_t *bottom, ptrdiff_t bottom_linesize,   \
     187             :                                  uint8_t *dst, ptrdiff_t dst_linesize,               \
     188             :                                  ptrdiff_t width, ptrdiff_t height,                \
     189             :                                  FilterParams *param, double *values, int starty) \
     190             : {                                                                              \
     191             :     double opacity = param->opacity;                                           \
     192             :     int i, j;                                                                  \
     193             :                                                                                \
     194             :     for (i = 0; i < height; i++) {                                             \
     195             :         for (j = 0; j < width; j++) {                                          \
     196             :             dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \
     197             :         }                                                                      \
     198             :         dst    += dst_linesize;                                                \
     199             :         top    += top_linesize;                                                \
     200             :         bottom += bottom_linesize;                                             \
     201             :     }                                                                          \
     202             : }
     203             : 
     204             : #define DEFINE_BLEND16(name, expr)                                             \
     205             : static void blend_## name##_16bit(const uint8_t *_top, ptrdiff_t top_linesize,       \
     206             :                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
     207             :                                   uint8_t *_dst, ptrdiff_t dst_linesize,             \
     208             :                                   ptrdiff_t width, ptrdiff_t height,           \
     209             :                                   FilterParams *param, double *values, int starty)         \
     210             : {                                                                              \
     211             :     const uint16_t *top = (uint16_t*)_top;                                     \
     212             :     const uint16_t *bottom = (uint16_t*)_bottom;                               \
     213             :     uint16_t *dst = (uint16_t*)_dst;                                           \
     214             :     double opacity = param->opacity;                                           \
     215             :     int i, j;                                                                  \
     216             :     dst_linesize /= 2;                                                         \
     217             :     top_linesize /= 2;                                                         \
     218             :     bottom_linesize /= 2;                                                      \
     219             :                                                                                \
     220             :     for (i = 0; i < height; i++) {                                             \
     221             :         for (j = 0; j < width; j++) {                                          \
     222             :             dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \
     223             :         }                                                                      \
     224             :         dst    += dst_linesize;                                                \
     225             :         top    += top_linesize;                                                \
     226             :         bottom += bottom_linesize;                                             \
     227             :     }                                                                          \
     228             : }
     229             : 
     230             : #define A top[j]
     231             : #define B bottom[j]
     232             : 
     233             : #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
     234             : #define SCREEN(x, a, b)   (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
     235             : #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
     236             : #define DODGE(a, b)       (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
     237             : 
     238           6 : DEFINE_BLEND8(addition,   FFMIN(255, A + B))
     239           6 : DEFINE_BLEND8(grainmerge, av_clip_uint8(A + B - 128))
     240           6 : DEFINE_BLEND8(average,    (A + B) / 2)
     241           6 : DEFINE_BLEND8(subtract,   FFMAX(0, A - B))
     242           6 : DEFINE_BLEND8(multiply,   MULTIPLY(1, A, B))
     243           0 : DEFINE_BLEND8(multiply128,av_clip_uint8((A - 128) * B / 32. + 128))
     244           6 : DEFINE_BLEND8(negation,   255 - FFABS(255 - A - B))
     245           6 : DEFINE_BLEND8(extremity,  FFABS(255 - A - B))
     246           6 : DEFINE_BLEND8(difference, FFABS(A - B))
     247        1329 : DEFINE_BLEND8(grainextract, av_clip_uint8(128 + A - B))
     248           6 : DEFINE_BLEND8(screen,     SCREEN(1, A, B))
     249           0 : DEFINE_BLEND8(overlay,    (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
     250           0 : DEFINE_BLEND8(hardlight,  (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
     251           6 : DEFINE_BLEND8(hardmix,    (A < (255 - B)) ? 0: 255)
     252           0 : DEFINE_BLEND8(heat,       (A == 0) ? 0 : 255 - FFMIN(((255 - B) * (255 - B)) / A, 255))
     253           0 : DEFINE_BLEND8(freeze,     (B == 0) ? 0 : 255 - FFMIN(((255 - A) * (255 - A)) / B, 255))
     254           6 : DEFINE_BLEND8(darken,     FFMIN(A, B))
     255           6 : DEFINE_BLEND8(lighten,    FFMAX(A, B))
     256           0 : DEFINE_BLEND8(divide,     av_clip_uint8(B == 0 ? 255 : 255 * A / B))
     257           0 : DEFINE_BLEND8(dodge,      DODGE(A, B))
     258           0 : DEFINE_BLEND8(burn,       BURN(A, B))
     259           0 : DEFINE_BLEND8(softlight,  (A > 127) ? B + (255 - B) * (A - 127.5) / 127.5 * (0.5 - fabs(B - 127.5) / 255): B - B * ((127.5 - A) / 127.5) * (0.5 - fabs(B - 127.5)/255))
     260           0 : DEFINE_BLEND8(exclusion,  A + B - 2 * A * B / 255)
     261           0 : DEFINE_BLEND8(pinlight,   (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
     262           6 : DEFINE_BLEND8(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 255)
     263           0 : DEFINE_BLEND8(reflect,    (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
     264           0 : DEFINE_BLEND8(glow,       (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
     265           6 : DEFINE_BLEND8(and,        A & B)
     266           6 : DEFINE_BLEND8(or,         A | B)
     267           6 : DEFINE_BLEND8(xor,        A ^ B)
     268           0 : DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
     269           0 : DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
     270             : 
     271             : #undef MULTIPLY
     272             : #undef SCREEN
     273             : #undef BURN
     274             : #undef DODGE
     275             : 
     276             : #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
     277             : #define SCREEN(x, a, b)   (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
     278             : #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
     279             : #define DODGE(a, b)       (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
     280             : 
     281           0 : DEFINE_BLEND16(addition,   FFMIN(65535, A + B))
     282           0 : DEFINE_BLEND16(grainmerge, av_clip_uint16(A + B - 32768))
     283           0 : DEFINE_BLEND16(average,    (A + B) / 2)
     284           0 : DEFINE_BLEND16(subtract,   FFMAX(0, A - B))
     285           0 : DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B))
     286           0 : DEFINE_BLEND16(multiply128, av_clip_uint16((A - 32768) * B / 8192. + 32768))
     287           0 : DEFINE_BLEND16(negation,   65535 - FFABS(65535 - A - B))
     288           0 : DEFINE_BLEND16(extremity,  FFABS(65535 - A - B))
     289           0 : DEFINE_BLEND16(difference, FFABS(A - B))
     290           0 : DEFINE_BLEND16(grainextract, av_clip_uint16(32768 + A - B))
     291           0 : DEFINE_BLEND16(screen,     SCREEN(1, A, B))
     292           0 : DEFINE_BLEND16(overlay,    (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
     293           0 : DEFINE_BLEND16(hardlight,  (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
     294           0 : DEFINE_BLEND16(hardmix,    (A < (65535 - B)) ? 0: 65535)
     295           0 : DEFINE_BLEND16(heat,       (A == 0) ? 0 : 65535 - FFMIN(((65535 - B) * (65535 - B)) / A, 65535))
     296           0 : DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 65535 - FFMIN(((65535 - A) * (65535 - A)) / B, 65535))
     297           0 : DEFINE_BLEND16(darken,     FFMIN(A, B))
     298           0 : DEFINE_BLEND16(lighten,    FFMAX(A, B))
     299           0 : DEFINE_BLEND16(divide,     av_clip_uint16(B == 0 ? 65535 : 65535 * A / B))
     300           0 : DEFINE_BLEND16(dodge,      DODGE(A, B))
     301           0 : DEFINE_BLEND16(burn,       BURN(A, B))
     302           0 : DEFINE_BLEND16(softlight,  (A > 32767) ? B + (65535 - B) * (A - 32767.5) / 32767.5 * (0.5 - fabs(B - 32767.5) / 65535): B - B * ((32767.5 - A) / 32767.5) * (0.5 - fabs(B - 32767.5)/65535))
     303           0 : DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 65535)
     304           0 : DEFINE_BLEND16(pinlight,   (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
     305           0 : DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 65535)
     306           0 : DEFINE_BLEND16(reflect,    (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
     307           0 : DEFINE_BLEND16(glow,       (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
     308           0 : DEFINE_BLEND16(and,        A & B)
     309           0 : DEFINE_BLEND16(or,         A | B)
     310           0 : DEFINE_BLEND16(xor,        A ^ B)
     311           0 : DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
     312           0 : DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
     313             : 
     314             : #define DEFINE_BLEND_EXPR(type, name, div)                                     \
     315             : static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize,          \
     316             :                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \
     317             :                                uint8_t *_dst, ptrdiff_t dst_linesize,                \
     318             :                                ptrdiff_t width, ptrdiff_t height,              \
     319             :                                FilterParams *param, double *values, int starty) \
     320             : {                                                                              \
     321             :     const type *top = (type*)_top;                                             \
     322             :     const type *bottom = (type*)_bottom;                                       \
     323             :     type *dst = (type*)_dst;                                                   \
     324             :     AVExpr *e = param->e;                                                      \
     325             :     int y, x;                                                                  \
     326             :     dst_linesize /= div;                                                       \
     327             :     top_linesize /= div;                                                       \
     328             :     bottom_linesize /= div;                                                    \
     329             :                                                                                \
     330             :     for (y = 0; y < height; y++) {                                             \
     331             :         values[VAR_Y] = y + starty;                                            \
     332             :         for (x = 0; x < width; x++) {                                          \
     333             :             values[VAR_X]      = x;                                            \
     334             :             values[VAR_TOP]    = values[VAR_A] = top[x];                       \
     335             :             values[VAR_BOTTOM] = values[VAR_B] = bottom[x];                    \
     336             :             dst[x] = av_expr_eval(e, values, NULL);                            \
     337             :         }                                                                      \
     338             :         dst    += dst_linesize;                                                \
     339             :         top    += top_linesize;                                                \
     340             :         bottom += bottom_linesize;                                             \
     341             :     }                                                                          \
     342             : }
     343             : 
     344           0 : DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
     345           0 : DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
     346             : 
     347        1323 : static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
     348             : {
     349        1323 :     ThreadData *td = arg;
     350        1323 :     int slice_start = (td->h *  jobnr   ) / nb_jobs;
     351        1323 :     int slice_end   = (td->h * (jobnr+1)) / nb_jobs;
     352        1323 :     int height      = slice_end - slice_start;
     353        1323 :     const uint8_t *top    = td->top->data[td->plane];
     354        1323 :     const uint8_t *bottom = td->bottom->data[td->plane];
     355        1323 :     uint8_t *dst    = td->dst->data[td->plane];
     356             :     double values[VAR_VARS_NB];
     357             : 
     358        1323 :     values[VAR_N]  = td->inlink->frame_count_out;
     359        1323 :     values[VAR_T]  = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
     360        1323 :     values[VAR_W]  = td->w;
     361        1323 :     values[VAR_H]  = td->h;
     362        1323 :     values[VAR_SW] = td->w / (double)td->dst->width;
     363        1323 :     values[VAR_SH] = td->h / (double)td->dst->height;
     364             : 
     365       10584 :     td->param->blend(top + slice_start * td->top->linesize[td->plane],
     366        1323 :                      td->top->linesize[td->plane],
     367        1323 :                      bottom + slice_start * td->bottom->linesize[td->plane],
     368        1323 :                      td->bottom->linesize[td->plane],
     369        1323 :                      dst + slice_start * td->dst->linesize[td->plane],
     370        1323 :                      td->dst->linesize[td->plane],
     371        2646 :                      td->w, height, td->param, &values[0], slice_start);
     372        1323 :     return 0;
     373             : }
     374             : 
     375          49 : static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
     376             :                             const AVFrame *bottom_buf)
     377             : {
     378          49 :     BlendContext *s = ctx->priv;
     379          49 :     AVFilterLink *inlink = ctx->inputs[0];
     380          49 :     AVFilterLink *outlink = ctx->outputs[0];
     381             :     AVFrame *dst_buf;
     382             :     int plane;
     383             : 
     384          49 :     dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     385          49 :     if (!dst_buf)
     386           0 :         return top_buf;
     387          49 :     av_frame_copy_props(dst_buf, top_buf);
     388             : 
     389         196 :     for (plane = 0; plane < s->nb_planes; plane++) {
     390         147 :         int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
     391         147 :         int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
     392         147 :         int outw = AV_CEIL_RSHIFT(dst_buf->width,  hsub);
     393         147 :         int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);
     394         147 :         FilterParams *param = &s->params[plane];
     395         147 :         ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
     396             :                           .w = outw, .h = outh, .param = param, .plane = plane,
     397             :                           .inlink = inlink };
     398             : 
     399         147 :         ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ff_filter_get_nb_threads(ctx)));
     400             :     }
     401             : 
     402          49 :     if (!s->tblend)
     403           0 :         av_frame_free(&top_buf);
     404             : 
     405          49 :     return dst_buf;
     406             : }
     407             : 
     408           0 : static int blend_frame_for_dualinput(FFFrameSync *fs)
     409             : {
     410           0 :     AVFilterContext *ctx = fs->parent;
     411             :     AVFrame *top_buf, *bottom_buf, *dst_buf;
     412             :     int ret;
     413             : 
     414           0 :     ret = ff_framesync_dualinput_get(fs, &top_buf, &bottom_buf);
     415           0 :     if (ret < 0)
     416           0 :         return ret;
     417           0 :     if (!bottom_buf)
     418           0 :         return ff_filter_frame(ctx->outputs[0], top_buf);
     419           0 :     dst_buf = blend_frame(ctx, top_buf, bottom_buf);
     420           0 :     return ff_filter_frame(ctx->outputs[0], dst_buf);
     421             : }
     422             : 
     423           1 : static av_cold int init(AVFilterContext *ctx)
     424             : {
     425           1 :     BlendContext *s = ctx->priv;
     426             : 
     427           1 :     s->tblend = !strcmp(ctx->filter->name, "tblend");
     428             : 
     429           1 :     s->fs.on_event = blend_frame_for_dualinput;
     430           1 :     return 0;
     431             : }
     432             : 
     433           1 : static int query_formats(AVFilterContext *ctx)
     434             : {
     435             :     static const enum AVPixelFormat pix_fmts[] = {
     436             :         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
     437             :         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
     438             :         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
     439             :         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
     440             :         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
     441             :         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
     442             :         AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,
     443             :         AV_PIX_FMT_NONE
     444             :     };
     445             : 
     446           1 :     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
     447           1 :     if (!fmts_list)
     448           0 :         return AVERROR(ENOMEM);
     449           1 :     return ff_set_common_formats(ctx, fmts_list);
     450             : }
     451             : 
     452           1 : static av_cold void uninit(AVFilterContext *ctx)
     453             : {
     454           1 :     BlendContext *s = ctx->priv;
     455             :     int i;
     456             : 
     457           1 :     ff_framesync_uninit(&s->fs);
     458           1 :     av_frame_free(&s->prev_frame);
     459             : 
     460           5 :     for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
     461           4 :         av_expr_free(s->params[i].e);
     462           1 : }
     463             : 
     464         225 : void ff_blend_init(FilterParams *param, int is_16bit)
     465             : {
     466         225 :     switch (param->mode) {
     467          13 :     case BLEND_ADDITION:   param->blend = is_16bit ? blend_addition_16bit   : blend_addition_8bit;   break;
     468          13 :     case BLEND_GRAINMERGE: param->blend = is_16bit ? blend_grainmerge_16bit : blend_grainmerge_8bit; break;
     469          13 :     case BLEND_AND:        param->blend = is_16bit ? blend_and_16bit        : blend_and_8bit;        break;
     470          13 :     case BLEND_AVERAGE:    param->blend = is_16bit ? blend_average_16bit    : blend_average_8bit;    break;
     471           0 :     case BLEND_BURN:       param->blend = is_16bit ? blend_burn_16bit       : blend_burn_8bit;       break;
     472          13 :     case BLEND_DARKEN:     param->blend = is_16bit ? blend_darken_16bit     : blend_darken_8bit;     break;
     473          13 :     case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
     474          17 :     case BLEND_GRAINEXTRACT: param->blend = is_16bit ? blend_grainextract_16bit: blend_grainextract_8bit; break;
     475           0 :     case BLEND_DIVIDE:     param->blend = is_16bit ? blend_divide_16bit     : blend_divide_8bit;     break;
     476           0 :     case BLEND_DODGE:      param->blend = is_16bit ? blend_dodge_16bit      : blend_dodge_8bit;      break;
     477           0 :     case BLEND_EXCLUSION:  param->blend = is_16bit ? blend_exclusion_16bit  : blend_exclusion_8bit;  break;
     478          13 :     case BLEND_EXTREMITY:  param->blend = is_16bit ? blend_extremity_16bit  : blend_extremity_8bit;  break;
     479           0 :     case BLEND_FREEZE:     param->blend = is_16bit ? blend_freeze_16bit     : blend_freeze_8bit;     break;
     480           0 :     case BLEND_GLOW:       param->blend = is_16bit ? blend_glow_16bit       : blend_glow_8bit;       break;
     481           0 :     case BLEND_HARDLIGHT:  param->blend = is_16bit ? blend_hardlight_16bit  : blend_hardlight_8bit;  break;
     482          13 :     case BLEND_HARDMIX:    param->blend = is_16bit ? blend_hardmix_16bit    : blend_hardmix_8bit;    break;
     483           0 :     case BLEND_HEAT:       param->blend = is_16bit ? blend_heat_16bit       : blend_heat_8bit;       break;
     484          13 :     case BLEND_LIGHTEN:    param->blend = is_16bit ? blend_lighten_16bit    : blend_lighten_8bit;    break;
     485           0 :     case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
     486          13 :     case BLEND_MULTIPLY:   param->blend = is_16bit ? blend_multiply_16bit   : blend_multiply_8bit;   break;
     487           0 :     case BLEND_MULTIPLY128:param->blend = is_16bit ? blend_multiply128_16bit: blend_multiply128_8bit;break;
     488          13 :     case BLEND_NEGATION:   param->blend = is_16bit ? blend_negation_16bit   : blend_negation_8bit;   break;
     489           0 :     case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop :
     490           0 :                                           param->opacity == 0 ? blend_copybottom :
     491           0 :                                           is_16bit ? blend_normal_16bit     : blend_normal_8bit;     break;
     492          13 :     case BLEND_OR:         param->blend = is_16bit ? blend_or_16bit         : blend_or_8bit;         break;
     493           0 :     case BLEND_OVERLAY:    param->blend = is_16bit ? blend_overlay_16bit    : blend_overlay_8bit;    break;
     494          13 :     case BLEND_PHOENIX:    param->blend = is_16bit ? blend_phoenix_16bit    : blend_phoenix_8bit;    break;
     495           0 :     case BLEND_PINLIGHT:   param->blend = is_16bit ? blend_pinlight_16bit   : blend_pinlight_8bit;   break;
     496           0 :     case BLEND_REFLECT:    param->blend = is_16bit ? blend_reflect_16bit    : blend_reflect_8bit;    break;
     497          13 :     case BLEND_SCREEN:     param->blend = is_16bit ? blend_screen_16bit     : blend_screen_8bit;     break;
     498           0 :     case BLEND_SOFTLIGHT:  param->blend = is_16bit ? blend_softlight_16bit  : blend_softlight_8bit;  break;
     499          13 :     case BLEND_SUBTRACT:   param->blend = is_16bit ? blend_subtract_16bit   : blend_subtract_8bit;   break;
     500           0 :     case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
     501          13 :     case BLEND_XOR:        param->blend = is_16bit ? blend_xor_16bit        : blend_xor_8bit;        break;
     502             :     }
     503             : 
     504         225 :     if (param->opacity == 0 && param->mode != BLEND_NORMAL) {
     505           0 :         param->blend = blend_copytop;
     506             :     }
     507             : 
     508             :     if (ARCH_X86)
     509         225 :         ff_blend_init_x86(param, is_16bit);
     510         225 : }
     511             : 
     512           1 : static int config_output(AVFilterLink *outlink)
     513             : {
     514           1 :     AVFilterContext *ctx = outlink->src;
     515           1 :     AVFilterLink *toplink = ctx->inputs[TOP];
     516           1 :     BlendContext *s = ctx->priv;
     517           1 :     const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
     518             :     int ret, plane, is_16bit;
     519             : 
     520           1 :     if (!s->tblend) {
     521           0 :         AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
     522             : 
     523           0 :         if (toplink->format != bottomlink->format) {
     524           0 :             av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
     525           0 :             return AVERROR(EINVAL);
     526             :         }
     527           0 :         if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {
     528           0 :             av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
     529             :                    "(size %dx%d) do not match the corresponding "
     530             :                    "second input link %s parameters (size %dx%d)\n",
     531           0 :                    ctx->input_pads[TOP].name, toplink->w, toplink->h,
     532           0 :                    ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h);
     533           0 :             return AVERROR(EINVAL);
     534             :         }
     535             :     }
     536             : 
     537           1 :     outlink->w = toplink->w;
     538           1 :     outlink->h = toplink->h;
     539           1 :     outlink->time_base = toplink->time_base;
     540           1 :     outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
     541           1 :     outlink->frame_rate = toplink->frame_rate;
     542             : 
     543           1 :     s->hsub = pix_desc->log2_chroma_w;
     544           1 :     s->vsub = pix_desc->log2_chroma_h;
     545             : 
     546           1 :     is_16bit = pix_desc->comp[0].depth == 16;
     547           1 :     s->nb_planes = av_pix_fmt_count_planes(toplink->format);
     548             : 
     549           1 :     if (!s->tblend)
     550           0 :         if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)
     551           0 :             return ret;
     552             : 
     553           5 :     for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
     554           4 :         FilterParams *param = &s->params[plane];
     555             : 
     556           4 :         if (s->all_mode >= 0)
     557           4 :             param->mode = s->all_mode;
     558           4 :         if (s->all_opacity < 1)
     559           0 :             param->opacity = s->all_opacity;
     560             : 
     561           4 :         ff_blend_init(param, is_16bit);
     562             : 
     563           4 :         if (s->all_expr && !param->expr_str) {
     564           0 :             param->expr_str = av_strdup(s->all_expr);
     565           0 :             if (!param->expr_str)
     566           0 :                 return AVERROR(ENOMEM);
     567             :         }
     568           4 :         if (param->expr_str) {
     569           0 :             ret = av_expr_parse(&param->e, param->expr_str, var_names,
     570             :                                 NULL, NULL, NULL, NULL, 0, ctx);
     571           0 :             if (ret < 0)
     572           0 :                 return ret;
     573           0 :             param->blend = is_16bit? blend_expr_16bit : blend_expr_8bit;
     574             :         }
     575             :     }
     576             : 
     577           1 :     return s->tblend ? 0 : ff_framesync_configure(&s->fs);
     578             : }
     579             : 
     580             : #if CONFIG_BLEND_FILTER
     581             : 
     582           0 : static int activate(AVFilterContext *ctx)
     583             : {
     584           0 :     BlendContext *s = ctx->priv;
     585           0 :     return ff_framesync_activate(&s->fs);
     586             : }
     587             : 
     588             : static const AVFilterPad blend_inputs[] = {
     589             :     {
     590             :         .name          = "top",
     591             :         .type          = AVMEDIA_TYPE_VIDEO,
     592             :     },{
     593             :         .name          = "bottom",
     594             :         .type          = AVMEDIA_TYPE_VIDEO,
     595             :     },
     596             :     { NULL }
     597             : };
     598             : 
     599             : static const AVFilterPad blend_outputs[] = {
     600             :     {
     601             :         .name          = "default",
     602             :         .type          = AVMEDIA_TYPE_VIDEO,
     603             :         .config_props  = config_output,
     604             :     },
     605             :     { NULL }
     606             : };
     607             : 
     608             : AVFilter ff_vf_blend = {
     609             :     .name          = "blend",
     610             :     .description   = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
     611             :     .preinit       = blend_framesync_preinit,
     612             :     .init          = init,
     613             :     .uninit        = uninit,
     614             :     .priv_size     = sizeof(BlendContext),
     615             :     .query_formats = query_formats,
     616             :     .activate      = activate,
     617             :     .inputs        = blend_inputs,
     618             :     .outputs       = blend_outputs,
     619             :     .priv_class    = &blend_class,
     620             :     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
     621             : };
     622             : 
     623             : #endif
     624             : 
     625             : #if CONFIG_TBLEND_FILTER
     626             : 
     627          50 : static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
     628             : {
     629          50 :     BlendContext *s = inlink->dst->priv;
     630          50 :     AVFilterLink *outlink = inlink->dst->outputs[0];
     631             : 
     632          50 :     if (s->prev_frame) {
     633          49 :         AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
     634          49 :         av_frame_free(&s->prev_frame);
     635          49 :         s->prev_frame = frame;
     636          49 :         return ff_filter_frame(outlink, out);
     637             :     }
     638           1 :     s->prev_frame = frame;
     639           1 :     return 0;
     640             : }
     641             : 
     642             : static const AVOption tblend_options[] = {
     643             :     COMMON_OPTIONS,
     644             :     { NULL }
     645             : };
     646             : 
     647             : AVFILTER_DEFINE_CLASS(tblend);
     648             : 
     649             : static const AVFilterPad tblend_inputs[] = {
     650             :     {
     651             :         .name          = "default",
     652             :         .type          = AVMEDIA_TYPE_VIDEO,
     653             :         .filter_frame  = tblend_filter_frame,
     654             :     },
     655             :     { NULL }
     656             : };
     657             : 
     658             : static const AVFilterPad tblend_outputs[] = {
     659             :     {
     660             :         .name          = "default",
     661             :         .type          = AVMEDIA_TYPE_VIDEO,
     662             :         .config_props  = config_output,
     663             :     },
     664             :     { NULL }
     665             : };
     666             : 
     667             : AVFilter ff_vf_tblend = {
     668             :     .name          = "tblend",
     669             :     .description   = NULL_IF_CONFIG_SMALL("Blend successive frames."),
     670             :     .priv_size     = sizeof(BlendContext),
     671             :     .priv_class    = &tblend_class,
     672             :     .query_formats = query_formats,
     673             :     .init          = init,
     674             :     .uninit        = uninit,
     675             :     .inputs        = tblend_inputs,
     676             :     .outputs       = tblend_outputs,
     677             :     .flags         = AVFILTER_FLAG_SLICE_THREADS,
     678             : };
     679             : 
     680             : #endif

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