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FFmpeg/libavfilter/vf_blend.c

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  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/intfloat.h"

  23. #include "libavutil/eval.h"

  24. #include "libavutil/opt.h"

  25. #include "libavutil/pixfmt.h"

  26. #include "avfilter.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.     int depth;

  46.     FilterParams params[4];

  47.     int tblend;

  48.     AVFrame *prev_frame;        /* only used with tblend */

  49. } BlendContext;

  50. 

  51. static const char *const var_names[] = {   "X",   "Y",   "W",   "H",   "SW",   "SH",   "T",   "N",   "A",   "B",   "TOP",   "BOTTOM",        NULL };

  52. 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 };

  53. 

  54. typedef struct ThreadData {

  55.     const AVFrame *top, *bottom;

  56.     AVFrame *dst;

  57.     AVFilterLink *inlink;

  58.     int plane;

  59.     int w, h;

  60.     FilterParams *param;

  61. } ThreadData;

  62. 

  63. #define OFFSET(x) offsetof(BlendContext, x)

  64. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

  65. 

  66. static const AVOption blend_options[] = {

  67.     { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },

  68.     { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },

  69.     { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },

  70.     { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode" },

  71.     { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode" },

  72.     { "addition",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION},   0, 0, FLAGS, "mode" },

  73.     { "addition128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },

  74.     { "grainmerge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINMERGE}, 0, 0, FLAGS, "mode" },

  75.     { "and",        "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND},        0, 0, FLAGS, "mode" },

  76.     { "average",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE},    0, 0, FLAGS, "mode" },

  77.     { "burn",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN},       0, 0, FLAGS, "mode" },

  78.     { "darken",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN},     0, 0, FLAGS, "mode" },

  79.     { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },

  80.     { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },

  81.     { "grainextract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GRAINEXTRACT}, 0, 0, FLAGS, "mode" },

  82.     { "divide",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE},     0, 0, FLAGS, "mode" },

  83.     { "dodge",      "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE},      0, 0, FLAGS, "mode" },

  84.     { "exclusion",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION},  0, 0, FLAGS, "mode" },

  85.     { "extremity",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXTREMITY},  0, 0, FLAGS, "mode" },

  86.     { "freeze",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_FREEZE},     0, 0, FLAGS, "mode" },

  87.     { "glow",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW},       0, 0, FLAGS, "mode" },

  88.     { "hardlight",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT},  0, 0, FLAGS, "mode" },

  89.     { "hardmix",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX},    0, 0, FLAGS, "mode" },

  90.     { "heat",       "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HEAT},       0, 0, FLAGS, "mode" },

  91.     { "lighten",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN},    0, 0, FLAGS, "mode" },

  92.     { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },

  93.     { "multiply",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY},   0, 0, FLAGS, "mode" },

  94.     { "multiply128","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY128},0, 0, FLAGS, "mode" },

  95.     { "negation",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION},   0, 0, FLAGS, "mode" },

  96.     { "normal",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL},     0, 0, FLAGS, "mode" },

  97.     { "or",         "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR},         0, 0, FLAGS, "mode" },

  98.     { "overlay",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY},    0, 0, FLAGS, "mode" },

  99.     { "phoenix",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX},    0, 0, FLAGS, "mode" },

  100.     { "pinlight",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT},   0, 0, FLAGS, "mode" },

  101.     { "reflect",    "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT},    0, 0, FLAGS, "mode" },

  102.     { "screen",     "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN},     0, 0, FLAGS, "mode" },

  103.     { "softlight",  "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT},  0, 0, FLAGS, "mode" },

  104.     { "subtract",   "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT},   0, 0, FLAGS, "mode" },

  105.     { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },

  106.     { "xor",        "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR},        0, 0, FLAGS, "mode" },

  107.     { "c0_expr",  "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },

  108.     { "c1_expr",  "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },

  109.     { "c2_expr",  "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },

  110.     { "c3_expr",  "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },

  111.     { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, FLAGS },

  112.     { "c0_opacity",  "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },

  113.     { "c1_opacity",  "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },

  114.     { "c2_opacity",  "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },

  115.     { "c3_opacity",  "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },

  116.     { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },

  117.     { NULL }

  118. };

  119. 

  120. FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);

  121. 

  122. #define COPY(src, depth)                                                            \

  123. static void blend_copy ## src##_##depth(const uint8_t *top, ptrdiff_t top_linesize,    \

  124.                             const uint8_t *bottom, ptrdiff_t bottom_linesize,\

  125.                             uint8_t *dst, ptrdiff_t dst_linesize,            \

  126.                             ptrdiff_t width, ptrdiff_t height,               \

  127.                             FilterParams *param, double *values, int starty) \

  128. {                                                                            \

  129.     av_image_copy_plane(dst, dst_linesize, src, src ## _linesize,            \

  130.                         width * depth / 8, height);                          \

  131. }

  132. 

  133. COPY(top, 8)

  134. COPY(bottom, 8)

  135. 

  136. COPY(top, 16)

  137. COPY(bottom, 16)

  138. 

  139. COPY(top, 32)

  140. COPY(bottom, 32)

  141. 

  142. #undef COPY

  143. 

  144. static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,

  145.                               const uint8_t *bottom, ptrdiff_t bottom_linesize,

  146.                               uint8_t *dst, ptrdiff_t dst_linesize,

  147.                               ptrdiff_t width, ptrdiff_t height,

  148.                               FilterParams *param, double *values, int starty)

  149. {

  150.     const double opacity = param->opacity;

  151.     int i, j;

  152. 

  153.     for (i = 0; i < height; i++) {

  154.         for (j = 0; j < width; j++) {

  155.             dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);

  156.         }

  157.         dst    += dst_linesize;

  158.         top    += top_linesize;

  159.         bottom += bottom_linesize;

  160.     }

  161. }

  162. 

  163. static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,

  164.                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize,

  165.                                   uint8_t *_dst, ptrdiff_t dst_linesize,

  166.                                   ptrdiff_t width, ptrdiff_t height,

  167.                                   FilterParams *param, double *values, int starty)

  168. {

  169.     const uint16_t *top = (uint16_t*)_top;

  170.     const uint16_t *bottom = (uint16_t*)_bottom;

  171.     uint16_t *dst = (uint16_t*)_dst;

  172.     const double opacity = param->opacity;

  173.     int i, j;

  174.     dst_linesize /= 2;

  175.     top_linesize /= 2;

  176.     bottom_linesize /= 2;

  177. 

  178.     for (i = 0; i < height; i++) {

  179.         for (j = 0; j < width; j++) {

  180.             dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);

  181.         }

  182.         dst    += dst_linesize;

  183.         top    += top_linesize;

  184.         bottom += bottom_linesize;

  185.     }

  186. }

  187. 

  188. static void blend_normal_32bit(const uint8_t *_top, ptrdiff_t top_linesize,

  189.                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,

  190.                                uint8_t *_dst, ptrdiff_t dst_linesize,

  191.                                ptrdiff_t width, ptrdiff_t height,

  192.                                FilterParams *param, double *values, int starty)

  193. {

  194.     const float *top = (float*)_top;

  195.     const float *bottom = (float*)_bottom;

  196.     float *dst = (float*)_dst;

  197.     const double opacity = param->opacity;

  198.     int i, j;

  199.     dst_linesize /= 4;

  200.     top_linesize /= 4;

  201.     bottom_linesize /= 4;

  202. 

  203.     for (i = 0; i < height; i++) {

  204.         for (j = 0; j < width; j++) {

  205.             dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);

  206.         }

  207.         dst    += dst_linesize;

  208.         top    += top_linesize;

  209.         bottom += bottom_linesize;

  210.     }

  211. }

  212. 

  213. #define DEFINE_BLEND8(name, expr)                                              \

  214. static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize,         \

  215.                                  const uint8_t *bottom, ptrdiff_t bottom_linesize,   \

  216.                                  uint8_t *dst, ptrdiff_t dst_linesize,               \

  217.                                  ptrdiff_t width, ptrdiff_t height,                \

  218.                                  FilterParams *param, double *values, int starty) \

  219. {                                                                              \

  220.     double opacity = param->opacity;                                           \

  221.     int i, j;                                                                  \

  222.                                                                                \

  223.     for (i = 0; i < height; i++) {                                             \

  224.         for (j = 0; j < width; j++) {                                          \

  225.             dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \

  226.         }                                                                      \

  227.         dst    += dst_linesize;                                                \

  228.         top    += top_linesize;                                                \

  229.         bottom += bottom_linesize;                                             \

  230.     }                                                                          \

  231. }

  232. 

  233. #define DEFINE_BLEND16(name, expr, depth)                                            \

  234. static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_linesize,\

  235.                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize, \

  236.                                   uint8_t *_dst, ptrdiff_t dst_linesize,             \

  237.                                   ptrdiff_t width, ptrdiff_t height,           \

  238.                                   FilterParams *param, double *values, int starty)         \

  239. {                                                                              \

  240.     const uint16_t *top = (const uint16_t*)_top;                               \

  241.     const uint16_t *bottom = (const uint16_t*)_bottom;                         \

  242.     uint16_t *dst = (uint16_t*)_dst;                                           \

  243.     double opacity = param->opacity;                                           \

  244.     int i, j;                                                                  \

  245.     dst_linesize /= 2;                                                         \

  246.     top_linesize /= 2;                                                         \

  247.     bottom_linesize /= 2;                                                      \

  248.                                                                                \

  249.     for (i = 0; i < height; i++) {                                             \

  250.         for (j = 0; j < width; j++) {                                          \

  251.             dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \

  252.         }                                                                      \

  253.         dst    += dst_linesize;                                                \

  254.         top    += top_linesize;                                                \

  255.         bottom += bottom_linesize;                                             \

  256.     }                                                                          \

  257. }

  258. 

  259. #define DEFINE_BLEND32(name, expr, depth)                                            \

  260. static void blend_## name##_##depth##bit(const uint8_t *_top, ptrdiff_t top_linesize,\

  261.                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize, \

  262.                                   uint8_t *_dst, ptrdiff_t dst_linesize,             \

  263.                                   ptrdiff_t width, ptrdiff_t height,                 \

  264.                                   FilterParams *param, double *values, int starty)   \

  265. {                                                                              \

  266.     const float *top = (const float*)_top;                                     \

  267.     const float *bottom = (const float*)_bottom;                               \

  268.     float *dst = (float*)_dst;                                                 \

  269.     double opacity = param->opacity;                                           \

  270.     int i, j;                                                                  \

  271.     dst_linesize /= 4;                                                         \

  272.     top_linesize /= 4;                                                         \

  273.     bottom_linesize /= 4;                                                      \

  274.                                                                                \

  275.     for (i = 0; i < height; i++) {                                             \

  276.         for (j = 0; j < width; j++) {                                          \

  277.             dst[j] = top[j] + ((expr) - top[j]) * opacity;                     \

  278.         }                                                                      \

  279.         dst    += dst_linesize;                                                \

  280.         top    += top_linesize;                                                \

  281.         bottom += bottom_linesize;                                             \

  282.     }                                                                          \

  283. }

  284. 

  285. #define A top[j]

  286. #define B bottom[j]

  287. 

  288. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))

  289. #define SCREEN(x, a, b)   (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))

  290. #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))

  291. #define DODGE(a, b)       (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))

  292. 

  293. DEFINE_BLEND8(addition,   FFMIN(255, A + B))

  294. DEFINE_BLEND8(grainmerge, av_clip_uint8(A + B - 128))

  295. DEFINE_BLEND8(average,    (A + B) / 2)

  296. DEFINE_BLEND8(subtract,   FFMAX(0, A - B))

  297. DEFINE_BLEND8(multiply,   MULTIPLY(1, A, B))

  298. DEFINE_BLEND8(multiply128,av_clip_uint8((A - 128) * B / 32. + 128))

  299. DEFINE_BLEND8(negation,   255 - FFABS(255 - A - B))

  300. DEFINE_BLEND8(extremity,  FFABS(255 - A - B))

  301. DEFINE_BLEND8(difference, FFABS(A - B))

  302. DEFINE_BLEND8(grainextract, av_clip_uint8(128 + A - B))

  303. DEFINE_BLEND8(screen,     SCREEN(1, A, B))

  304. DEFINE_BLEND8(overlay,    (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))

  305. DEFINE_BLEND8(hardlight,  (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))

  306. DEFINE_BLEND8(hardmix,    (A < (255 - B)) ? 0: 255)

  307. DEFINE_BLEND8(heat,       (A == 0) ? 0 : 255 - FFMIN(((255 - B) * (255 - B)) / A, 255))

  308. DEFINE_BLEND8(freeze,     (B == 0) ? 0 : 255 - FFMIN(((255 - A) * (255 - A)) / B, 255))

  309. DEFINE_BLEND8(darken,     FFMIN(A, B))

  310. DEFINE_BLEND8(lighten,    FFMAX(A, B))

  311. DEFINE_BLEND8(divide,     av_clip_uint8(B == 0 ? 255 : 255 * A / B))

  312. DEFINE_BLEND8(dodge,      DODGE(A, B))

  313. DEFINE_BLEND8(burn,       BURN(A, B))

  314. 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))

  315. DEFINE_BLEND8(exclusion,  A + B - 2 * A * B / 255)

  316. DEFINE_BLEND8(pinlight,   (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))

  317. DEFINE_BLEND8(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 255)

  318. DEFINE_BLEND8(reflect,    (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))

  319. DEFINE_BLEND8(glow,       (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))

  320. DEFINE_BLEND8(and,        A & B)

  321. DEFINE_BLEND8(or,         A | B)

  322. DEFINE_BLEND8(xor,        A ^ B)

  323. DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))

  324. DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))

  325. 

  326. #undef MULTIPLY

  327. #undef SCREEN

  328. #undef BURN

  329. #undef DODGE

  330. 

  331. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))

  332. #define SCREEN(x, a, b)   (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))

  333. #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))

  334. #define DODGE(a, b)       (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))

  335. 

  336. DEFINE_BLEND16(addition,   FFMIN(65535, A + B), 16)

  337. DEFINE_BLEND16(grainmerge, av_clip_uint16(A + B - 32768), 16)

  338. DEFINE_BLEND16(average,    (A + B) / 2, 16)

  339. DEFINE_BLEND16(subtract,   FFMAX(0, A - B), 16)

  340. DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B), 16)

  341. DEFINE_BLEND16(multiply128, av_clip_uint16((A - 32768) * B / 8192. + 32768), 16)

  342. DEFINE_BLEND16(negation,   65535 - FFABS(65535 - A - B), 16)

  343. DEFINE_BLEND16(extremity,  FFABS(65535 - A - B), 16)

  344. DEFINE_BLEND16(difference, FFABS(A - B), 16)

  345. DEFINE_BLEND16(grainextract, av_clip_uint16(32768 + A - B), 16)

  346. DEFINE_BLEND16(screen,     SCREEN(1, A, B), 16)

  347. DEFINE_BLEND16(overlay,    (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B), 16)

  348. DEFINE_BLEND16(hardlight,  (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A), 16)

  349. DEFINE_BLEND16(hardmix,    (A < (65535 - B)) ? 0: 65535, 16)

  350. DEFINE_BLEND16(heat,       (A == 0) ? 0 : 65535 - FFMIN(((65535 - B) * (65535 - B)) / A, 65535), 16)

  351. DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 65535 - FFMIN(((65535 - A) * (65535 - A)) / B, 65535), 16)

  352. DEFINE_BLEND16(darken,     FFMIN(A, B), 16)

  353. DEFINE_BLEND16(lighten,    FFMAX(A, B), 16)

  354. DEFINE_BLEND16(divide,     av_clip_uint16(B == 0 ? 65535 : 65535 * A / B), 16)

  355. DEFINE_BLEND16(dodge,      DODGE(A, B), 16)

  356. DEFINE_BLEND16(burn,       BURN(A, B), 16)

  357. 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), 16)

  358. DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 65535, 16)

  359. DEFINE_BLEND16(pinlight,   (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)), 16)

  360. DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 65535, 16)

  361. DEFINE_BLEND16(reflect,    (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))), 16)

  362. DEFINE_BLEND16(glow,       (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))), 16)

  363. DEFINE_BLEND16(and,        A & B, 16)

  364. DEFINE_BLEND16(or,         A | B, 16)

  365. DEFINE_BLEND16(xor,        A ^ B, 16)

  366. DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B), 16)

  367. DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)), 16)

  368. 

  369. #undef MULTIPLY

  370. #undef SCREEN

  371. #undef BURN

  372. #undef DODGE

  373. 

  374. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 1023))

  375. #define SCREEN(x, a, b)   (1023 - (x) * ((1023 - (a)) * (1023 - (b)) / 1023))

  376. #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 1023 - ((1023 - (b)) << 10) / (a)))

  377. #define DODGE(a, b)       (((a) == 1023) ? (a) : FFMIN(1023, (((b) << 10) / (1023 - (a)))))

  378. 

  379. DEFINE_BLEND16(addition,   FFMIN(1023, A + B), 10)

  380. DEFINE_BLEND16(grainmerge, (int)av_clip_uintp2(A + B - 512, 10), 10)

  381. DEFINE_BLEND16(average,    (A + B) / 2, 10)

  382. DEFINE_BLEND16(subtract,   FFMAX(0, A - B), 10)

  383. DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B), 10)

  384. DEFINE_BLEND16(multiply128, (int)av_clip_uintp2((A - 512) * B / 128. + 512, 10), 10)

  385. DEFINE_BLEND16(negation,   1023 - FFABS(1023 - A - B), 10)

  386. DEFINE_BLEND16(extremity,  FFABS(1023 - A - B), 10)

  387. DEFINE_BLEND16(difference, FFABS(A - B), 10)

  388. DEFINE_BLEND16(grainextract, (int)av_clip_uintp2(512 + A - B, 10), 10)

  389. DEFINE_BLEND16(screen,     SCREEN(1, A, B), 10)

  390. DEFINE_BLEND16(overlay,    (A < 512) ? MULTIPLY(2, A, B) : SCREEN(2, A, B), 10)

  391. DEFINE_BLEND16(hardlight,  (B < 512) ? MULTIPLY(2, B, A) : SCREEN(2, B, A), 10)

  392. DEFINE_BLEND16(hardmix,    (A < (1023 - B)) ? 0: 1023, 10)

  393. DEFINE_BLEND16(heat,       (A == 0) ? 0 : 1023 - FFMIN(((1023 - B) * (1023 - B)) / A, 1023), 10)

  394. DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 1023 - FFMIN(((1023 - A) * (1023 - A)) / B, 1023), 10)

  395. DEFINE_BLEND16(darken,     FFMIN(A, B), 10)

  396. DEFINE_BLEND16(lighten,    FFMAX(A, B), 10)

  397. DEFINE_BLEND16(divide,     (int)av_clip_uintp2(B == 0 ? 1023 : 1023 * A / B, 10), 10)

  398. DEFINE_BLEND16(dodge,      DODGE(A, B), 10)

  399. DEFINE_BLEND16(burn,       BURN(A, B), 10)

  400. DEFINE_BLEND16(softlight,  (A > 511) ? B + (1023 - B) * (A - 511.5) / 511.5 * (0.5 - fabs(B - 511.5) / 1023): B - B * ((511.5 - A) / 511.5) * (0.5 - fabs(B - 511.5)/1023), 10)

  401. DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 1023, 10)

  402. DEFINE_BLEND16(pinlight,   (B < 512) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 512)), 10)

  403. DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 1023, 10)

  404. DEFINE_BLEND16(reflect,    (B == 1023) ? B : FFMIN(1023, (A * A / (1023 - B))), 10)

  405. DEFINE_BLEND16(glow,       (A == 1023) ? A : FFMIN(1023, (B * B / (1023 - A))), 10)

  406. DEFINE_BLEND16(and,        A & B, 10)

  407. DEFINE_BLEND16(or,         A | B, 10)

  408. DEFINE_BLEND16(xor,        A ^ B, 10)

  409. DEFINE_BLEND16(vividlight, (A < 512) ? BURN(2 * A, B) : DODGE(2 * (A - 512), B), 10)

  410. DEFINE_BLEND16(linearlight,(int)av_clip_uintp2((B < 512) ? B + 2 * A - 1023 : B + 2 * (A - 512), 10), 10)

  411. 

  412. #undef MULTIPLY

  413. #undef SCREEN

  414. #undef BURN

  415. #undef DODGE

  416. 

  417. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 4095))

  418. #define SCREEN(x, a, b)   (4095 - (x) * ((4095 - (a)) * (4095 - (b)) / 4095))

  419. #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 4095 - ((4095 - (b)) << 12) / (a)))

  420. #define DODGE(a, b)       (((a) == 4095) ? (a) : FFMIN(4095, (((b) << 12) / (4095 - (a)))))

  421. 

  422. DEFINE_BLEND16(addition,   FFMIN(4095, A + B), 12)

  423. DEFINE_BLEND16(grainmerge, (int)av_clip_uintp2(A + B - 2048, 12), 12)

  424. DEFINE_BLEND16(average,    (A + B) / 2, 12)

  425. DEFINE_BLEND16(subtract,   FFMAX(0, A - B), 12)

  426. DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B), 12)

  427. DEFINE_BLEND16(multiply128, (int)av_clip_uintp2((A - 2048) * B / 512. + 2048, 12), 12)

  428. DEFINE_BLEND16(negation,   4095 - FFABS(4095 - A - B), 12)

  429. DEFINE_BLEND16(extremity,  FFABS(4095 - A - B), 12)

  430. DEFINE_BLEND16(difference, FFABS(A - B), 12)

  431. DEFINE_BLEND16(grainextract, (int)av_clip_uintp2(2048 + A - B, 12), 12)

  432. DEFINE_BLEND16(screen,     SCREEN(1, A, B), 12)

  433. DEFINE_BLEND16(overlay,    (A < 2048) ? MULTIPLY(2, A, B) : SCREEN(2, A, B), 12)

  434. DEFINE_BLEND16(hardlight,  (B < 2048) ? MULTIPLY(2, B, A) : SCREEN(2, B, A), 12)

  435. DEFINE_BLEND16(hardmix,    (A < (4095 - B)) ? 0: 4095, 12)

  436. DEFINE_BLEND16(heat,       (A == 0) ? 0 : 4095 - FFMIN(((4095 - B) * (4095 - B)) / A, 4095), 12)

  437. DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 4095 - FFMIN(((4095 - A) * (4095 - A)) / B, 4095), 12)

  438. DEFINE_BLEND16(darken,     FFMIN(A, B), 12)

  439. DEFINE_BLEND16(lighten,    FFMAX(A, B), 12)

  440. DEFINE_BLEND16(divide,     (int)av_clip_uintp2(B == 0 ? 4095 : 4095 * A / B, 12), 12)

  441. DEFINE_BLEND16(dodge,      DODGE(A, B), 12)

  442. DEFINE_BLEND16(burn,       BURN(A, B), 12)

  443. DEFINE_BLEND16(softlight,  (A > 2047) ? B + (4095 - B) * (A - 2047.5) / 2047.5 * (0.5 - fabs(B - 2047.5) / 4095): B - B * ((2047.5 - A) / 2047.5) * (0.5 - fabs(B - 2047.5)/4095), 12)

  444. DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 4095, 12)

  445. DEFINE_BLEND16(pinlight,   (B < 2048) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 2048)), 12)

  446. DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 4095, 12)

  447. DEFINE_BLEND16(reflect,    (B == 4095) ? B : FFMIN(4095, (A * A / (4095 - B))), 12)

  448. DEFINE_BLEND16(glow,       (A == 4095) ? A : FFMIN(4095, (B * B / (4095 - A))), 12)

  449. DEFINE_BLEND16(and,        A & B, 12)

  450. DEFINE_BLEND16(or,         A | B, 12)

  451. DEFINE_BLEND16(xor,        A ^ B, 12)

  452. DEFINE_BLEND16(vividlight, (A < 2048) ? BURN(2 * A, B) : DODGE(2 * (A - 2048), B), 12)

  453. DEFINE_BLEND16(linearlight,(int)av_clip_uintp2((B < 2048) ? B + 2 * A - 4095 : B + 2 * (A - 2048), 12), 12)

  454. 

  455. #undef MULTIPLY

  456. #undef SCREEN

  457. #undef BURN

  458. #undef DODGE

  459. 

  460. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 511))

  461. #define SCREEN(x, a, b)   (511 - (x) * ((511 - (a)) * (511 - (b)) / 511))

  462. #define BURN(a, b)        (((a) == 0) ? (a) : FFMAX(0, 511 - ((511 - (b)) << 9) / (a)))

  463. #define DODGE(a, b)       (((a) == 511) ? (a) : FFMIN(511, (((b) << 9) / (511 - (a)))))

  464. 

  465. DEFINE_BLEND16(addition,   FFMIN(511, A + B), 9)

  466. DEFINE_BLEND16(grainmerge, (int)av_clip_uintp2(A + B - 256, 9), 9)

  467. DEFINE_BLEND16(average,    (A + B) / 2, 9)

  468. DEFINE_BLEND16(subtract,   FFMAX(0, A - B), 9)

  469. DEFINE_BLEND16(multiply,   MULTIPLY(1, A, B), 9)

  470. DEFINE_BLEND16(multiply128, (int)av_clip_uintp2((A - 256) * B / 64. + 256, 9), 9)

  471. DEFINE_BLEND16(negation,   511 - FFABS(511 - A - B), 9)

  472. DEFINE_BLEND16(extremity,  FFABS(511 - A - B), 9)

  473. DEFINE_BLEND16(difference, FFABS(A - B), 9)

  474. DEFINE_BLEND16(grainextract, (int)av_clip_uintp2(256 + A - B, 9), 9)

  475. DEFINE_BLEND16(screen,     SCREEN(1, A, B), 9)

  476. DEFINE_BLEND16(overlay,    (A < 256) ? MULTIPLY(2, A, B) : SCREEN(2, A, B), 9)

  477. DEFINE_BLEND16(hardlight,  (B < 256) ? MULTIPLY(2, B, A) : SCREEN(2, B, A), 9)

  478. DEFINE_BLEND16(hardmix,    (A < (511 - B)) ? 0: 511, 9)

  479. DEFINE_BLEND16(heat,       (A == 0) ? 0 : 511 - FFMIN(((511 - B) * (511 - B)) / A, 511), 9)

  480. DEFINE_BLEND16(freeze,     (B == 0) ? 0 : 511 - FFMIN(((511 - A) * (511 - A)) / B, 511), 9)

  481. DEFINE_BLEND16(darken,     FFMIN(A, B), 9)

  482. DEFINE_BLEND16(lighten,    FFMAX(A, B), 9)

  483. DEFINE_BLEND16(divide,     (int)av_clip_uintp2(B == 0 ? 511 : 511 * A / B, 9), 9)

  484. DEFINE_BLEND16(dodge,      DODGE(A, B), 9)

  485. DEFINE_BLEND16(burn,       BURN(A, B), 9)

  486. DEFINE_BLEND16(softlight,  (A > 511) ? B + (511 - B) * (A - 511.5) / 511.5 * (0.5 - fabs(B - 511.5) / 511): B - B * ((511.5 - A) / 511.5) * (0.5 - fabs(B - 511.5)/511), 9)

  487. DEFINE_BLEND16(exclusion,  A + B - 2 * A * B / 511, 9)

  488. DEFINE_BLEND16(pinlight,   (B < 256) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 256)), 9)

  489. DEFINE_BLEND16(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 511, 9)

  490. DEFINE_BLEND16(reflect,    (B == 511) ? B : FFMIN(511, (A * A / (511 - B))), 9)

  491. DEFINE_BLEND16(glow,       (A == 511) ? A : FFMIN(511, (B * B / (511 - A))), 9)

  492. DEFINE_BLEND16(and,        A & B, 9)

  493. DEFINE_BLEND16(or,         A | B, 9)

  494. DEFINE_BLEND16(xor,        A ^ B, 9)

  495. DEFINE_BLEND16(vividlight, (A < 256) ? BURN(2 * A, B) : DODGE(2 * (A - 256), B), 9)

  496. DEFINE_BLEND16(linearlight,(int)av_clip_uintp2((B < 256) ? B + 2 * A - 511 : B + 2 * (A - 256), 9), 9)

  497. 

  498. #undef MULTIPLY

  499. #undef SCREEN

  500. #undef BURN

  501. #undef DODGE

  502. 

  503. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 1.0))

  504. #define SCREEN(x, a, b)   (1.0 - (x) * ((1.0 - (a)) * (1.0 - (b)) / 1.0))

  505. #define BURN(a, b)        (((a) <= 0.0) ? (a) : FFMAX(0.0, 1.0 - (1.0 - (b)) / (a)))

  506. #define DODGE(a, b)       (((a) >= 1.0) ? (a) : FFMIN(1.0, ((b) / (1.0 - (a)))))

  507. 

  508. DEFINE_BLEND32(addition,   A + B, 32)

  509. DEFINE_BLEND32(grainmerge, A + B - 0.5, 32)

  510. DEFINE_BLEND32(average,    (A + B) / 2, 32)

  511. DEFINE_BLEND32(subtract,   A - B, 32)

  512. DEFINE_BLEND32(multiply,   A * B, 32)

  513. DEFINE_BLEND32(multiply128, (A - 0.5) * B / 0.125 + 0.5, 32)

  514. DEFINE_BLEND32(negation,   1.0 - FFABS(1.0 - A - B), 32)

  515. DEFINE_BLEND32(extremity,  FFABS(1.0 - A - B), 32)

  516. DEFINE_BLEND32(difference, FFABS(A - B), 32)

  517. DEFINE_BLEND32(grainextract, 0.5 + A - B, 32)

  518. DEFINE_BLEND32(screen,     SCREEN(1, A, B), 32)

  519. DEFINE_BLEND32(overlay,    (A < 0.5) ? MULTIPLY(2, A, B) : SCREEN(2, A, B), 32)

  520. DEFINE_BLEND32(hardlight,  (B < 0.5) ? MULTIPLY(2, B, A) : SCREEN(2, B, A), 32)

  521. DEFINE_BLEND32(hardmix,    (A < (1.0 - B)) ? 0: 1.0, 32)

  522. DEFINE_BLEND32(heat,       (A == 0) ? 0 : 1.0 - FFMIN(((1.0 - B) * (1.0 - B)) / A, 1.0), 32)

  523. DEFINE_BLEND32(freeze,     (B == 0) ? 0 : 1.0 - FFMIN(((1.0 - A) * (1.0 - A)) / B, 1.0), 32)

  524. DEFINE_BLEND32(darken,     FFMIN(A, B), 32)

  525. DEFINE_BLEND32(lighten,    FFMAX(A, B), 32)

  526. DEFINE_BLEND32(divide,     B == 0 ? 1.0 : 1.0 * A / B, 32)

  527. DEFINE_BLEND32(dodge,      DODGE(A, B), 32)

  528. DEFINE_BLEND32(burn,       BURN(A, B), 32)

  529. DEFINE_BLEND32(softlight,  (A > 0.5) ? B + (1.0 - B) * (A - 0.5) / 0.5 * (0.5 - fabs(B - 0.5) / 1.0): B - B * ((0.5 - A) / 0.5) * (0.5 - fabs(B - 0.5)/1.0), 32)

  530. DEFINE_BLEND32(exclusion,  A + B - 2 * A * B / 1.0, 32)

  531. DEFINE_BLEND32(pinlight,   (B < 0.5) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 0.5)), 32)

  532. DEFINE_BLEND32(phoenix,    FFMIN(A, B) - FFMAX(A, B) + 1.0, 32)

  533. DEFINE_BLEND32(reflect,    (B == 1.0) ? B : FFMIN(1.0, (A * A / (1.0 - B))), 32)

  534. DEFINE_BLEND32(glow,       (A == 1.0) ? A : FFMIN(1.0, (B * B / (1.0 - A))), 32)

  535. DEFINE_BLEND32(and,        av_int2float(av_float2int(A) & av_float2int(B)), 32)

  536. DEFINE_BLEND32(or,         av_int2float(av_float2int(A) | av_float2int(B)), 32)

  537. DEFINE_BLEND32(xor,        av_int2float(av_float2int(A) ^ av_float2int(B)), 32)

  538. DEFINE_BLEND32(vividlight, (A < 0.5) ? BURN(2 * A, B) : DODGE(2 * (A - 0.5), B), 32)

  539. DEFINE_BLEND32(linearlight,(B < 0.5) ? B + 2 * A - 1.0 : B + 2 * (A - 0.5), 32)

  540. 

  541. #define DEFINE_BLEND_EXPR(type, name, div)                                     \

  542. static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize,          \

  543.                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \

  544.                                uint8_t *_dst, ptrdiff_t dst_linesize,                \

  545.                                ptrdiff_t width, ptrdiff_t height,              \

  546.                                FilterParams *param, double *values, int starty) \

  547. {                                                                              \

  548.     const type *top = (type*)_top;                                             \

  549.     const type *bottom = (type*)_bottom;                                       \

  550.     type *dst = (type*)_dst;                                                   \

  551.     AVExpr *e = param->e;                                                      \

  552.     int y, x;                                                                  \

  553.     dst_linesize /= div;                                                       \

  554.     top_linesize /= div;                                                       \

  555.     bottom_linesize /= div;                                                    \

  556.                                                                                \

  557.     for (y = 0; y < height; y++) {                                             \

  558.         values[VAR_Y] = y + starty;                                            \

  559.         for (x = 0; x < width; x++) {                                          \

  560.             values[VAR_X]      = x;                                            \

  561.             values[VAR_TOP]    = values[VAR_A] = top[x];                       \

  562.             values[VAR_BOTTOM] = values[VAR_B] = bottom[x];                    \

  563.             dst[x] = av_expr_eval(e, values, NULL);                            \

  564.         }                                                                      \

  565.         dst    += dst_linesize;                                                \

  566.         top    += top_linesize;                                                \

  567.         bottom += bottom_linesize;                                             \

  568.     }                                                                          \

  569. }

  570. 

  571. DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)

  572. DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)

  573. DEFINE_BLEND_EXPR(float, 32bit, 4)

  574. 

  575. static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)

  576. {

  577.     ThreadData *td = arg;

  578.     int slice_start = (td->h *  jobnr   ) / nb_jobs;

  579.     int slice_end   = (td->h * (jobnr+1)) / nb_jobs;

  580.     int height      = slice_end - slice_start;

  581.     const uint8_t *top    = td->top->data[td->plane];

  582.     const uint8_t *bottom = td->bottom->data[td->plane];

  583.     uint8_t *dst    = td->dst->data[td->plane];

  584.     double values[VAR_VARS_NB];

  585. 

  586.     values[VAR_N]  = td->inlink->frame_count_out;

  587.     values[VAR_T]  = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);

  588.     values[VAR_W]  = td->w;

  589.     values[VAR_H]  = td->h;

  590.     values[VAR_SW] = td->w / (double)td->dst->width;

  591.     values[VAR_SH] = td->h / (double)td->dst->height;

  592. 

  593.     td->param->blend(top + slice_start * td->top->linesize[td->plane],

  594.                      td->top->linesize[td->plane],

  595.                      bottom + slice_start * td->bottom->linesize[td->plane],

  596.                      td->bottom->linesize[td->plane],

  597.                      dst + slice_start * td->dst->linesize[td->plane],

  598.                      td->dst->linesize[td->plane],

  599.                      td->w, height, td->param, &values[0], slice_start);

  600.     return 0;

  601. }

  602. 

  603. static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,

  604.                             const AVFrame *bottom_buf)

  605. {

  606.     BlendContext *s = ctx->priv;

  607.     AVFilterLink *inlink = ctx->inputs[0];

  608.     AVFilterLink *outlink = ctx->outputs[0];

  609.     AVFrame *dst_buf;

  610.     int plane;

  611. 

  612.     dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);

  613.     if (!dst_buf)

  614.         return top_buf;

  615.     av_frame_copy_props(dst_buf, top_buf);

  616. 

  617.     for (plane = 0; plane < s->nb_planes; plane++) {

  618.         int hsub = plane == 1 || plane == 2 ? s->hsub : 0;

  619.         int vsub = plane == 1 || plane == 2 ? s->vsub : 0;

  620.         int outw = AV_CEIL_RSHIFT(dst_buf->width,  hsub);

  621.         int outh = AV_CEIL_RSHIFT(dst_buf->height, vsub);

  622.         FilterParams *param = &s->params[plane];

  623.         ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,

  624.                           .w = outw, .h = outh, .param = param, .plane = plane,

  625.                           .inlink = inlink };

  626. 

  627.         ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ff_filter_get_nb_threads(ctx)));

  628.     }

  629. 

  630.     if (!s->tblend)

  631.         av_frame_free(&top_buf);

  632. 

  633.     return dst_buf;

  634. }

  635. 

  636. static int blend_frame_for_dualinput(FFFrameSync *fs)

  637. {

  638.     AVFilterContext *ctx = fs->parent;

  639.     AVFrame *top_buf, *bottom_buf, *dst_buf;

  640.     int ret;

  641. 

  642.     ret = ff_framesync_dualinput_get(fs, &top_buf, &bottom_buf);

  643.     if (ret < 0)

  644.         return ret;

  645.     if (!bottom_buf)

  646.         return ff_filter_frame(ctx->outputs[0], top_buf);

  647.     dst_buf = blend_frame(ctx, top_buf, bottom_buf);

  648.     return ff_filter_frame(ctx->outputs[0], dst_buf);

  649. }

  650. 

  651. static av_cold int init(AVFilterContext *ctx)

  652. {

  653.     BlendContext *s = ctx->priv;

  654. 

  655.     s->tblend = !strcmp(ctx->filter->name, "tblend");

  656. 

  657.     s->fs.on_event = blend_frame_for_dualinput;

  658.     return 0;

  659. }

  660. 

  661. static int query_formats(AVFilterContext *ctx)

  662. {

  663.     static const enum AVPixelFormat pix_fmts[] = {

  664.         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,

  665.         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,

  666.         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,

  667.         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,

  668.         AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,

  669.         AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_GBRP9,

  670.         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,

  671.         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,

  672.         AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,

  673.         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,

  674.         AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,

  675.         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,

  676.         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,

  677.         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,

  678.         AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,

  679.         AV_PIX_FMT_GBRPF32, AV_PIX_FMT_GBRAPF32, AV_PIX_FMT_GRAYF32,

  680.         AV_PIX_FMT_NONE

  681.     };

  682. 

  683.     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);

  684.     if (!fmts_list)

  685.         return AVERROR(ENOMEM);

  686.     return ff_set_common_formats(ctx, fmts_list);

  687. }

  688. 

  689. static av_cold void uninit(AVFilterContext *ctx)

  690. {

  691.     BlendContext *s = ctx->priv;

  692.     int i;

  693. 

  694.     ff_framesync_uninit(&s->fs);

  695.     av_frame_free(&s->prev_frame);

  696. 

  697.     for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)

  698.         av_expr_free(s->params[i].e);

  699. }

  700. 

  701. #define DEFINE_INIT_BLEND_FUNC(depth, nbits)                                          \

  702. static av_cold void init_blend_func_##depth##_##nbits##bit(FilterParams *param)       \

  703. {                                                                                     \

  704.     switch (param->mode) {                                                            \

  705.     case BLEND_ADDITION:     param->blend = blend_addition_##depth##bit;     break;   \

  706.     case BLEND_GRAINMERGE:   param->blend = blend_grainmerge_##depth##bit;   break;   \

  707.     case BLEND_AND:          param->blend = blend_and_##depth##bit;          break;   \

  708.     case BLEND_AVERAGE:      param->blend = blend_average_##depth##bit;      break;   \

  709.     case BLEND_BURN:         param->blend = blend_burn_##depth##bit;         break;   \

  710.     case BLEND_DARKEN:       param->blend = blend_darken_##depth##bit;       break;   \

  711.     case BLEND_DIFFERENCE:   param->blend = blend_difference_##depth##bit;   break;   \

  712.     case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_##depth##bit; break;   \

  713.     case BLEND_DIVIDE:       param->blend = blend_divide_##depth##bit;       break;   \

  714.     case BLEND_DODGE:        param->blend = blend_dodge_##depth##bit;        break;   \

  715.     case BLEND_EXCLUSION:    param->blend = blend_exclusion_##depth##bit;    break;   \

  716.     case BLEND_EXTREMITY:    param->blend = blend_extremity_##depth##bit;    break;   \

  717.     case BLEND_FREEZE:       param->blend = blend_freeze_##depth##bit;       break;   \

  718.     case BLEND_GLOW:         param->blend = blend_glow_##depth##bit;         break;   \

  719.     case BLEND_HARDLIGHT:    param->blend = blend_hardlight_##depth##bit;    break;   \

  720.     case BLEND_HARDMIX:      param->blend = blend_hardmix_##depth##bit;      break;   \

  721.     case BLEND_HEAT:         param->blend = blend_heat_##depth##bit;         break;   \

  722.     case BLEND_LIGHTEN:      param->blend = blend_lighten_##depth##bit;      break;   \

  723.     case BLEND_LINEARLIGHT:  param->blend = blend_linearlight_##depth##bit;  break;   \

  724.     case BLEND_MULTIPLY:     param->blend = blend_multiply_##depth##bit;     break;   \

  725.     case BLEND_MULTIPLY128:  param->blend = blend_multiply128_##depth##bit;  break;   \

  726.     case BLEND_NEGATION:     param->blend = blend_negation_##depth##bit;     break;   \

  727.     case BLEND_NORMAL:       param->blend = blend_normal_##nbits##bit;       break;   \

  728.     case BLEND_OR:           param->blend = blend_or_##depth##bit;           break;   \

  729.     case BLEND_OVERLAY:      param->blend = blend_overlay_##depth##bit;      break;   \

  730.     case BLEND_PHOENIX:      param->blend = blend_phoenix_##depth##bit;      break;   \

  731.     case BLEND_PINLIGHT:     param->blend = blend_pinlight_##depth##bit;     break;   \

  732.     case BLEND_REFLECT:      param->blend = blend_reflect_##depth##bit;      break;   \

  733.     case BLEND_SCREEN:       param->blend = blend_screen_##depth##bit;       break;   \

  734.     case BLEND_SOFTLIGHT:    param->blend = blend_softlight_##depth##bit;    break;   \

  735.     case BLEND_SUBTRACT:     param->blend = blend_subtract_##depth##bit;     break;   \

  736.     case BLEND_VIVIDLIGHT:   param->blend = blend_vividlight_##depth##bit;   break;   \

  737.     case BLEND_XOR:          param->blend = blend_xor_##depth##bit;          break;   \

  738.     }                                                                                 \

  739. }

  740. DEFINE_INIT_BLEND_FUNC(8, 8)

  741. DEFINE_INIT_BLEND_FUNC(9, 16)

  742. DEFINE_INIT_BLEND_FUNC(10, 16)

  743. DEFINE_INIT_BLEND_FUNC(12, 16)

  744. DEFINE_INIT_BLEND_FUNC(16, 16)

  745. DEFINE_INIT_BLEND_FUNC(32, 32)

  746. 

  747. void ff_blend_init(FilterParams *param, int depth)

  748. {

  749.     switch (depth) {

  750.     case 8:

  751.         init_blend_func_8_8bit(param);

  752.         break;

  753.     case 9:

  754.         init_blend_func_9_16bit(param);

  755.         break;

  756.     case 10:

  757.         init_blend_func_10_16bit(param);

  758.         break;

  759.     case 12:

  760.         init_blend_func_12_16bit(param);

  761.         break;

  762.     case 16:

  763.         init_blend_func_16_16bit(param);

  764.         break;

  765.     case 32:

  766.         init_blend_func_32_32bit(param);

  767.         break;

  768.     }

  769. 

  770.     if (param->opacity == 0 && param->mode != BLEND_NORMAL) {

  771.         param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;

  772.     } else if (param->mode == BLEND_NORMAL) {

  773.         if (param->opacity == 1)

  774.             param->blend = depth > 8 ? depth > 16 ? blend_copytop_32 : blend_copytop_16 : blend_copytop_8;

  775.         else if (param->opacity == 0)

  776.             param->blend = depth > 8 ? depth > 16 ? blend_copybottom_32 : blend_copybottom_16 : blend_copybottom_8;

  777.     }

  778. 

  779.     if (ARCH_X86)

  780.         ff_blend_init_x86(param, depth);

  781. }

  782. 

  783. static int config_output(AVFilterLink *outlink)

  784. {

  785.     AVFilterContext *ctx = outlink->src;

  786.     AVFilterLink *toplink = ctx->inputs[TOP];

  787.     BlendContext *s = ctx->priv;

  788.     const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);

  789.     int ret, plane;

  790. 

  791.     if (!s->tblend) {

  792.         AVFilterLink *bottomlink = ctx->inputs[BOTTOM];

  793. 

  794.         if (toplink->format != bottomlink->format) {

  795.             av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");

  796.             return AVERROR(EINVAL);

  797.         }

  798.         if (toplink->w != bottomlink->w || toplink->h != bottomlink->h) {

  799.             av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "

  800.                    "(size %dx%d) do not match the corresponding "

  801.                    "second input link %s parameters (size %dx%d)\n",

  802.                    ctx->input_pads[TOP].name, toplink->w, toplink->h,

  803.                    ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h);

  804.             return AVERROR(EINVAL);

  805.         }

  806.     }

  807. 

  808.     outlink->w = toplink->w;

  809.     outlink->h = toplink->h;

  810.     outlink->time_base = toplink->time_base;

  811.     outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;

  812.     outlink->frame_rate = toplink->frame_rate;

  813. 

  814.     s->hsub = pix_desc->log2_chroma_w;

  815.     s->vsub = pix_desc->log2_chroma_h;

  816. 

  817.     s->depth = pix_desc->comp[0].depth;

  818.     s->nb_planes = av_pix_fmt_count_planes(toplink->format);

  819. 

  820.     if (!s->tblend)

  821.         if ((ret = ff_framesync_init_dualinput(&s->fs, ctx)) < 0)

  822.             return ret;

  823. 

  824.     for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {

  825.         FilterParams *param = &s->params[plane];

  826. 

  827.         if (s->all_mode >= 0)

  828.             param->mode = s->all_mode;

  829.         if (s->all_opacity < 1)

  830.             param->opacity = s->all_opacity;

  831. 

  832.         ff_blend_init(param, s->depth);

  833. 

  834.         if (s->all_expr && !param->expr_str) {

  835.             param->expr_str = av_strdup(s->all_expr);

  836.             if (!param->expr_str)

  837.                 return AVERROR(ENOMEM);

  838.         }

  839.         if (param->expr_str) {

  840.             ret = av_expr_parse(&param->e, param->expr_str, var_names,

  841.                                 NULL, NULL, NULL, NULL, 0, ctx);

  842.             if (ret < 0)

  843.                 return ret;

  844.             param->blend = s->depth > 8 ? s->depth > 16 ? blend_expr_32bit : blend_expr_16bit : blend_expr_8bit;

  845.         }

  846.     }

  847. 

  848.     if (s->tblend)

  849.         return 0;

  850. 

  851.     ret = ff_framesync_configure(&s->fs);

  852.     outlink->time_base = s->fs.time_base;

  853. 

  854.     return ret;

  855. }

  856. 

  857. #if CONFIG_BLEND_FILTER

  858. 

  859. static int activate(AVFilterContext *ctx)

  860. {

  861.     BlendContext *s = ctx->priv;

  862.     return ff_framesync_activate(&s->fs);

  863. }

  864. 

  865. static const AVFilterPad blend_inputs[] = {

  866.     {

  867.         .name          = "top",

  868.         .type          = AVMEDIA_TYPE_VIDEO,

  869.     },{

  870.         .name          = "bottom",

  871.         .type          = AVMEDIA_TYPE_VIDEO,

  872.     },

  873.     { NULL }

  874. };

  875. 

  876. static const AVFilterPad blend_outputs[] = {

  877.     {

  878.         .name          = "default",

  879.         .type          = AVMEDIA_TYPE_VIDEO,

  880.         .config_props  = config_output,

  881.     },

  882.     { NULL }

  883. };

  884. 

  885. AVFilter ff_vf_blend = {

  886.     .name          = "blend",

  887.     .description   = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),

  888.     .preinit       = blend_framesync_preinit,

  889.     .init          = init,

  890.     .uninit        = uninit,

  891.     .priv_size     = sizeof(BlendContext),

  892.     .query_formats = query_formats,

  893.     .activate      = activate,

  894.     .inputs        = blend_inputs,

  895.     .outputs       = blend_outputs,

  896.     .priv_class    = &blend_class,

  897.     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,

  898. };

  899. 

  900. #endif

  901. 

  902. #if CONFIG_TBLEND_FILTER

  903. 

  904. static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)

  905. {

  906.     AVFilterContext *ctx = inlink->dst;

  907.     BlendContext *s = ctx->priv;

  908.     AVFilterLink *outlink = ctx->outputs[0];

  909. 

  910.     if (s->prev_frame) {

  911.         AVFrame *out;

  912. 

  913.         if (ctx->is_disabled)

  914.             out = av_frame_clone(frame);

  915.         else

  916.             out = blend_frame(ctx, frame, s->prev_frame);

  917.         av_frame_free(&s->prev_frame);

  918.         s->prev_frame = frame;

  919.         return ff_filter_frame(outlink, out);

  920.     }

  921.     s->prev_frame = frame;

  922.     return 0;

  923. }

  924. 

  925. #define tblend_options blend_options

  926. AVFILTER_DEFINE_CLASS(tblend);

  927. 

  928. static const AVFilterPad tblend_inputs[] = {

  929.     {

  930.         .name          = "default",

  931.         .type          = AVMEDIA_TYPE_VIDEO,

  932.         .filter_frame  = tblend_filter_frame,

  933.     },

  934.     { NULL }

  935. };

  936. 

  937. static const AVFilterPad tblend_outputs[] = {

  938.     {

  939.         .name          = "default",

  940.         .type          = AVMEDIA_TYPE_VIDEO,

  941.         .config_props  = config_output,

  942.     },

  943.     { NULL }

  944. };

  945. 

  946. AVFilter ff_vf_tblend = {

  947.     .name          = "tblend",

  948.     .description   = NULL_IF_CONFIG_SMALL("Blend successive frames."),

  949.     .priv_size     = sizeof(BlendContext),

  950.     .priv_class    = &tblend_class,

  951.     .query_formats = query_formats,

  952.     .init          = init,

  953.     .uninit        = uninit,

  954.     .inputs        = tblend_inputs,

  955.     .outputs       = tblend_outputs,

  956.     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,

  957. };

  958. 

  959. #endif