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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/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.     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 COMMON_OPTIONS \

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  108.     { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\

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

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

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

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

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

  114. 

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

  116. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

  117. 

  118. static const AVOption blend_options[] = {

  119.     COMMON_OPTIONS,

  120.     { NULL }

  121. };

  122. 

  123. FRAMESYNC_DEFINE_CLASS(blend, BlendContext, fs);

  124. 

  125. #define COPY(src, depth)                                                            \

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

  127.                             const uint8_t *bottom, ptrdiff_t bottom_linesize,\

  128.                             uint8_t *dst, ptrdiff_t dst_linesize,            \

  129.                             ptrdiff_t width, ptrdiff_t height,               \

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

  131. {                                                                            \

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

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

  134. }

  135. 

  136. COPY(top, 8)

  137. COPY(bottom, 8)

  138. 

  139. COPY(top, 16)

  140. COPY(bottom, 16)

  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. #define DEFINE_BLEND8(name, expr)                                              \

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

  190.                                  const uint8_t *bottom, ptrdiff_t bottom_linesize,   \

  191.                                  uint8_t *dst, ptrdiff_t dst_linesize,               \

  192.                                  ptrdiff_t width, ptrdiff_t height,                \

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

  194. {                                                                              \

  195.     double opacity = param->opacity;                                           \

  196.     int i, j;                                                                  \

  197.                                                                                \

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

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

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

  201.         }                                                                      \

  202.         dst    += dst_linesize;                                                \

  203.         top    += top_linesize;                                                \

  204.         bottom += bottom_linesize;                                             \

  205.     }                                                                          \

  206. }

  207. 

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

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

  210.                                   const uint8_t *_bottom, ptrdiff_t bottom_linesize, \

  211.                                   uint8_t *_dst, ptrdiff_t dst_linesize,             \

  212.                                   ptrdiff_t width, ptrdiff_t height,           \

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

  214. {                                                                              \

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

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

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

  218.     double opacity = param->opacity;                                           \

  219.     int i, j;                                                                  \

  220.     dst_linesize /= 2;                                                         \

  221.     top_linesize /= 2;                                                         \

  222.     bottom_linesize /= 2;                                                      \

  223.                                                                                \

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

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

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

  227.         }                                                                      \

  228.         dst    += dst_linesize;                                                \

  229.         top    += top_linesize;                                                \

  230.         bottom += bottom_linesize;                                             \

  231.     }                                                                          \

  232. }

  233. 

  234. #define A top[j]

  235. #define B bottom[j]

  236. 

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

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

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

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

  241. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  263. 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))

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

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

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

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

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

  269. DEFINE_BLEND8(and,        A & B)

  270. DEFINE_BLEND8(or,         A | B)

  271. DEFINE_BLEND8(xor,        A ^ B)

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

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

  274. 

  275. #undef MULTIPLY

  276. #undef SCREEN

  277. #undef BURN

  278. #undef DODGE

  279. 

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

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

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

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

  284. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  306. 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)

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

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

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

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

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

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

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

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

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

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

  317. 

  318. #undef MULTIPLY

  319. #undef SCREEN

  320. #undef BURN

  321. #undef DODGE

  322. 

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

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

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

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

  327. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  349. 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)

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

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

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

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

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

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

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

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

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

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

  360. 

  361. #undef MULTIPLY

  362. #undef SCREEN

  363. #undef BURN

  364. #undef DODGE

  365. 

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

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

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

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

  370. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  392. 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)

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

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

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

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

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

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

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

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

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

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

  403. 

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

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

  406.                                const uint8_t *_bottom, ptrdiff_t bottom_linesize,    \

  407.                                uint8_t *_dst, ptrdiff_t dst_linesize,                \

  408.                                ptrdiff_t width, ptrdiff_t height,              \

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

  410. {                                                                              \

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

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

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

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

  415.     int y, x;                                                                  \

  416.     dst_linesize /= div;                                                       \

  417.     top_linesize /= div;                                                       \

  418.     bottom_linesize /= div;                                                    \

  419.                                                                                \

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

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

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

  423.             values[VAR_X]      = x;                                            \

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

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

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

  427.         }                                                                      \

  428.         dst    += dst_linesize;                                                \

  429.         top    += top_linesize;                                                \

  430.         bottom += bottom_linesize;                                             \

  431.     }                                                                          \

  432. }

  433. 

  434. DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)

  435. DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)

  436. 

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

  438. {

  439.     ThreadData *td = arg;

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

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

  442.     int height      = slice_end - slice_start;

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

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

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

  446.     double values[VAR_VARS_NB];

  447. 

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

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

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

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

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

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

  454. 

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

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

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

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

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

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

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

  462.     return 0;

  463. }

  464. 

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

  466.                             const AVFrame *bottom_buf)

  467. {

  468.     BlendContext *s = ctx->priv;

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

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

  471.     AVFrame *dst_buf;

  472.     int plane;

  473. 

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

  475.     if (!dst_buf)

  476.         return top_buf;

  477.     av_frame_copy_props(dst_buf, top_buf);

  478. 

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

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

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

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

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

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

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

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

  487.                           .inlink = inlink };

  488. 

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

  490.     }

  491. 

  492.     if (!s->tblend)

  493.         av_frame_free(&top_buf);

  494. 

  495.     return dst_buf;

  496. }

  497. 

  498. static int blend_frame_for_dualinput(FFFrameSync *fs)

  499. {

  500.     AVFilterContext *ctx = fs->parent;

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

  502.     int ret;

  503. 

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

  505.     if (ret < 0)

  506.         return ret;

  507.     if (!bottom_buf)

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

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

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

  511. }

  512. 

  513. static av_cold int init(AVFilterContext *ctx)

  514. {

  515.     BlendContext *s = ctx->priv;

  516. 

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

  518. 

  519.     s->fs.on_event = blend_frame_for_dualinput;

  520.     return 0;

  521. }

  522. 

  523. static int query_formats(AVFilterContext *ctx)

  524. {

  525.     static const enum AVPixelFormat pix_fmts[] = {

  526.         AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,

  527.         AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,

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

  529.         AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,

  530.         AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV440P10,

  531.         AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,

  532.         AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GRAY10,

  533.         AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,

  534.         AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GRAY12,

  535.         AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,

  536.         AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,

  537.         AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16, AV_PIX_FMT_GRAY16,

  538.         AV_PIX_FMT_NONE

  539.     };

  540. 

  541.     AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);

  542.     if (!fmts_list)

  543.         return AVERROR(ENOMEM);

  544.     return ff_set_common_formats(ctx, fmts_list);

  545. }

  546. 

  547. static av_cold void uninit(AVFilterContext *ctx)

  548. {

  549.     BlendContext *s = ctx->priv;

  550.     int i;

  551. 

  552.     ff_framesync_uninit(&s->fs);

  553.     av_frame_free(&s->prev_frame);

  554. 

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

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

  557. }

  558. 

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

  560. {

  561.     switch (depth) {

  562.     case 8:

  563.         switch (param->mode) {

  564.         case BLEND_ADDITION:   param->blend = blend_addition_8bit;   break;

  565.         case BLEND_GRAINMERGE: param->blend = blend_grainmerge_8bit; break;

  566.         case BLEND_AND:        param->blend = blend_and_8bit;        break;

  567.         case BLEND_AVERAGE:    param->blend = blend_average_8bit;    break;

  568.         case BLEND_BURN:       param->blend = blend_burn_8bit;       break;

  569.         case BLEND_DARKEN:     param->blend = blend_darken_8bit;     break;

  570.         case BLEND_DIFFERENCE: param->blend = blend_difference_8bit; break;

  571.         case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_8bit; break;

  572.         case BLEND_DIVIDE:     param->blend = blend_divide_8bit;     break;

  573.         case BLEND_DODGE:      param->blend = blend_dodge_8bit;      break;

  574.         case BLEND_EXCLUSION:  param->blend = blend_exclusion_8bit;  break;

  575.         case BLEND_EXTREMITY:  param->blend = blend_extremity_8bit;  break;

  576.         case BLEND_FREEZE:     param->blend = blend_freeze_8bit;     break;

  577.         case BLEND_GLOW:       param->blend = blend_glow_8bit;       break;

  578.         case BLEND_HARDLIGHT:  param->blend = blend_hardlight_8bit;  break;

  579.         case BLEND_HARDMIX:    param->blend = blend_hardmix_8bit;    break;

  580.         case BLEND_HEAT:       param->blend = blend_heat_8bit;       break;

  581.         case BLEND_LIGHTEN:    param->blend = blend_lighten_8bit;    break;

  582.         case BLEND_LINEARLIGHT:param->blend = blend_linearlight_8bit;break;

  583.         case BLEND_MULTIPLY:   param->blend = blend_multiply_8bit;   break;

  584.         case BLEND_MULTIPLY128:param->blend = blend_multiply128_8bit;break;

  585.         case BLEND_NEGATION:   param->blend = blend_negation_8bit;   break;

  586.         case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop_8 :

  587.                                               param->opacity == 0 ? blend_copybottom_8 :

  588.                                               blend_normal_8bit;     break;

  589.         case BLEND_OR:         param->blend = blend_or_8bit;         break;

  590.         case BLEND_OVERLAY:    param->blend = blend_overlay_8bit;    break;

  591.         case BLEND_PHOENIX:    param->blend = blend_phoenix_8bit;    break;

  592.         case BLEND_PINLIGHT:   param->blend = blend_pinlight_8bit;   break;

  593.         case BLEND_REFLECT:    param->blend = blend_reflect_8bit;    break;

  594.         case BLEND_SCREEN:     param->blend = blend_screen_8bit;     break;

  595.         case BLEND_SOFTLIGHT:  param->blend = blend_softlight_8bit;  break;

  596.         case BLEND_SUBTRACT:   param->blend = blend_subtract_8bit;   break;

  597.         case BLEND_VIVIDLIGHT: param->blend = blend_vividlight_8bit; break;

  598.         case BLEND_XOR:        param->blend = blend_xor_8bit;        break;

  599.         }

  600.         break;

  601.     case 10:

  602.         switch (param->mode) {

  603.         case BLEND_ADDITION:   param->blend = blend_addition_10bit;   break;

  604.         case BLEND_GRAINMERGE: param->blend = blend_grainmerge_10bit; break;

  605.         case BLEND_AND:        param->blend = blend_and_10bit;        break;

  606.         case BLEND_AVERAGE:    param->blend = blend_average_10bit;    break;

  607.         case BLEND_BURN:       param->blend = blend_burn_10bit;       break;

  608.         case BLEND_DARKEN:     param->blend = blend_darken_10bit;     break;

  609.         case BLEND_DIFFERENCE: param->blend = blend_difference_10bit; break;

  610.         case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_10bit; break;

  611.         case BLEND_DIVIDE:     param->blend = blend_divide_10bit;     break;

  612.         case BLEND_DODGE:      param->blend = blend_dodge_10bit;      break;

  613.         case BLEND_EXCLUSION:  param->blend = blend_exclusion_10bit;  break;

  614.         case BLEND_EXTREMITY:  param->blend = blend_extremity_10bit;  break;

  615.         case BLEND_FREEZE:     param->blend = blend_freeze_10bit;     break;

  616.         case BLEND_GLOW:       param->blend = blend_glow_10bit;       break;

  617.         case BLEND_HARDLIGHT:  param->blend = blend_hardlight_10bit;  break;

  618.         case BLEND_HARDMIX:    param->blend = blend_hardmix_10bit;    break;

  619.         case BLEND_HEAT:       param->blend = blend_heat_10bit;       break;

  620.         case BLEND_LIGHTEN:    param->blend = blend_lighten_10bit;    break;

  621.         case BLEND_LINEARLIGHT:param->blend = blend_linearlight_10bit;break;

  622.         case BLEND_MULTIPLY:   param->blend = blend_multiply_10bit;   break;

  623.         case BLEND_MULTIPLY128:param->blend = blend_multiply128_10bit;break;

  624.         case BLEND_NEGATION:   param->blend = blend_negation_10bit;   break;

  625.         case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop_16 :

  626.                                               param->opacity == 0 ? blend_copybottom_16 :

  627.                                               blend_normal_16bit;    break;

  628.         case BLEND_OR:         param->blend = blend_or_10bit;        break;

  629.         case BLEND_OVERLAY:    param->blend = blend_overlay_10bit;   break;

  630.         case BLEND_PHOENIX:    param->blend = blend_phoenix_10bit;   break;

  631.         case BLEND_PINLIGHT:   param->blend = blend_pinlight_10bit;  break;

  632.         case BLEND_REFLECT:    param->blend = blend_reflect_10bit;   break;

  633.         case BLEND_SCREEN:     param->blend = blend_screen_10bit;    break;

  634.         case BLEND_SOFTLIGHT:  param->blend = blend_softlight_10bit; break;

  635.         case BLEND_SUBTRACT:   param->blend = blend_subtract_10bit;  break;

  636.         case BLEND_VIVIDLIGHT: param->blend = blend_vividlight_10bit;break;

  637.         case BLEND_XOR:        param->blend = blend_xor_10bit;       break;

  638.         }

  639.         break;

  640.     case 12:

  641.         switch (param->mode) {

  642.         case BLEND_ADDITION:   param->blend = blend_addition_12bit;   break;

  643.         case BLEND_GRAINMERGE: param->blend = blend_grainmerge_12bit; break;

  644.         case BLEND_AND:        param->blend = blend_and_12bit;        break;

  645.         case BLEND_AVERAGE:    param->blend = blend_average_12bit;    break;

  646.         case BLEND_BURN:       param->blend = blend_burn_12bit;       break;

  647.         case BLEND_DARKEN:     param->blend = blend_darken_12bit;     break;

  648.         case BLEND_DIFFERENCE: param->blend = blend_difference_12bit; break;

  649.         case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_12bit; break;

  650.         case BLEND_DIVIDE:     param->blend = blend_divide_12bit;     break;

  651.         case BLEND_DODGE:      param->blend = blend_dodge_12bit;      break;

  652.         case BLEND_EXCLUSION:  param->blend = blend_exclusion_12bit;  break;

  653.         case BLEND_EXTREMITY:  param->blend = blend_extremity_12bit;  break;

  654.         case BLEND_FREEZE:     param->blend = blend_freeze_12bit;     break;

  655.         case BLEND_GLOW:       param->blend = blend_glow_12bit;       break;

  656.         case BLEND_HARDLIGHT:  param->blend = blend_hardlight_12bit;  break;

  657.         case BLEND_HARDMIX:    param->blend = blend_hardmix_12bit;    break;

  658.         case BLEND_HEAT:       param->blend = blend_heat_12bit;       break;

  659.         case BLEND_LIGHTEN:    param->blend = blend_lighten_12bit;    break;

  660.         case BLEND_LINEARLIGHT:param->blend = blend_linearlight_12bit;break;

  661.         case BLEND_MULTIPLY:   param->blend = blend_multiply_12bit;   break;

  662.         case BLEND_MULTIPLY128:param->blend = blend_multiply128_12bit;break;

  663.         case BLEND_NEGATION:   param->blend = blend_negation_12bit;   break;

  664.         case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop_16 :

  665.                                               param->opacity == 0 ? blend_copybottom_16 :

  666.                                               blend_normal_16bit;    break;

  667.         case BLEND_OR:         param->blend = blend_or_12bit;        break;

  668.         case BLEND_OVERLAY:    param->blend = blend_overlay_12bit;   break;

  669.         case BLEND_PHOENIX:    param->blend = blend_phoenix_12bit;   break;

  670.         case BLEND_PINLIGHT:   param->blend = blend_pinlight_12bit;  break;

  671.         case BLEND_REFLECT:    param->blend = blend_reflect_12bit;   break;

  672.         case BLEND_SCREEN:     param->blend = blend_screen_12bit;    break;

  673.         case BLEND_SOFTLIGHT:  param->blend = blend_softlight_12bit; break;

  674.         case BLEND_SUBTRACT:   param->blend = blend_subtract_12bit;  break;

  675.         case BLEND_VIVIDLIGHT: param->blend = blend_vividlight_12bit;break;

  676.         case BLEND_XOR:        param->blend = blend_xor_12bit;       break;

  677.         }

  678.         break;

  679.     case 16:

  680.         switch (param->mode) {

  681.         case BLEND_ADDITION:   param->blend = blend_addition_16bit;   break;

  682.         case BLEND_GRAINMERGE: param->blend = blend_grainmerge_16bit; break;

  683.         case BLEND_AND:        param->blend = blend_and_16bit;        break;

  684.         case BLEND_AVERAGE:    param->blend = blend_average_16bit;    break;

  685.         case BLEND_BURN:       param->blend = blend_burn_16bit;       break;

  686.         case BLEND_DARKEN:     param->blend = blend_darken_16bit;     break;

  687.         case BLEND_DIFFERENCE: param->blend = blend_difference_16bit; break;

  688.         case BLEND_GRAINEXTRACT: param->blend = blend_grainextract_16bit; break;

  689.         case BLEND_DIVIDE:     param->blend = blend_divide_16bit;     break;

  690.         case BLEND_DODGE:      param->blend = blend_dodge_16bit;      break;

  691.         case BLEND_EXCLUSION:  param->blend = blend_exclusion_16bit;  break;

  692.         case BLEND_EXTREMITY:  param->blend = blend_extremity_16bit;  break;

  693.         case BLEND_FREEZE:     param->blend = blend_freeze_16bit;     break;

  694.         case BLEND_GLOW:       param->blend = blend_glow_16bit;       break;

  695.         case BLEND_HARDLIGHT:  param->blend = blend_hardlight_16bit;  break;

  696.         case BLEND_HARDMIX:    param->blend = blend_hardmix_16bit;    break;

  697.         case BLEND_HEAT:       param->blend = blend_heat_16bit;       break;

  698.         case BLEND_LIGHTEN:    param->blend = blend_lighten_16bit;    break;

  699.         case BLEND_LINEARLIGHT:param->blend = blend_linearlight_16bit;break;

  700.         case BLEND_MULTIPLY:   param->blend = blend_multiply_16bit;   break;

  701.         case BLEND_MULTIPLY128:param->blend = blend_multiply128_16bit;break;

  702.         case BLEND_NEGATION:   param->blend = blend_negation_16bit;   break;

  703.         case BLEND_NORMAL:     param->blend = param->opacity == 1 ? blend_copytop_16 :

  704.                                               param->opacity == 0 ? blend_copybottom_16 :

  705.                                               blend_normal_16bit;    break;

  706.         case BLEND_OR:         param->blend = blend_or_16bit;        break;

  707.         case BLEND_OVERLAY:    param->blend = blend_overlay_16bit;   break;

  708.         case BLEND_PHOENIX:    param->blend = blend_phoenix_16bit;   break;

  709.         case BLEND_PINLIGHT:   param->blend = blend_pinlight_16bit;  break;

  710.         case BLEND_REFLECT:    param->blend = blend_reflect_16bit;   break;

  711.         case BLEND_SCREEN:     param->blend = blend_screen_16bit;    break;

  712.         case BLEND_SOFTLIGHT:  param->blend = blend_softlight_16bit; break;

  713.         case BLEND_SUBTRACT:   param->blend = blend_subtract_16bit;  break;

  714.         case BLEND_VIVIDLIGHT: param->blend = blend_vividlight_16bit;break;

  715.         case BLEND_XOR:        param->blend = blend_xor_16bit;       break;

  716.         }

  717.         break;

  718.     }

  719. 

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

  721.         param->blend = depth > 8 ? blend_copytop_16 : blend_copytop_8;

  722.     }

  723. 

  724.     if (ARCH_X86)

  725.         ff_blend_init_x86(param, depth);

  726. }

  727. 

  728. static int config_output(AVFilterLink *outlink)

  729. {

  730.     AVFilterContext *ctx = outlink->src;

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

  732.     BlendContext *s = ctx->priv;

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

  734.     int ret, plane;

  735. 

  736.     if (!s->tblend) {

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

  738. 

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

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

  741.             return AVERROR(EINVAL);

  742.         }

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

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

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

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

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

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

  749.             return AVERROR(EINVAL);

  750.         }

  751.     }

  752. 

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

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

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

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

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

  758. 

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

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

  761. 

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

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

  764. 

  765.     if (!s->tblend)

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

  767.             return ret;

  768. 

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

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

  771. 

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

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

  774.         if (s->all_opacity < 1)

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

  776. 

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

  778. 

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

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

  781.             if (!param->expr_str)

  782.                 return AVERROR(ENOMEM);

  783.         }

  784.         if (param->expr_str) {

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

  786.                                 NULL, NULL, NULL, NULL, 0, ctx);

  787.             if (ret < 0)

  788.                 return ret;

  789.             param->blend = s->depth > 8 ? blend_expr_16bit : blend_expr_8bit;

  790.         }

  791.     }

  792. 

  793.     return s->tblend ? 0 : ff_framesync_configure(&s->fs);

  794. }

  795. 

  796. #if CONFIG_BLEND_FILTER

  797. 

  798. static int activate(AVFilterContext *ctx)

  799. {

  800.     BlendContext *s = ctx->priv;

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

  802. }

  803. 

  804. static const AVFilterPad blend_inputs[] = {

  805.     {

  806.         .name          = "top",

  807.         .type          = AVMEDIA_TYPE_VIDEO,

  808.     },{

  809.         .name          = "bottom",

  810.         .type          = AVMEDIA_TYPE_VIDEO,

  811.     },

  812.     { NULL }

  813. };

  814. 

  815. static const AVFilterPad blend_outputs[] = {

  816.     {

  817.         .name          = "default",

  818.         .type          = AVMEDIA_TYPE_VIDEO,

  819.         .config_props  = config_output,

  820.     },

  821.     { NULL }

  822. };

  823. 

  824. AVFilter ff_vf_blend = {

  825.     .name          = "blend",

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

  827.     .preinit       = blend_framesync_preinit,

  828.     .init          = init,

  829.     .uninit        = uninit,

  830.     .priv_size     = sizeof(BlendContext),

  831.     .query_formats = query_formats,

  832.     .activate      = activate,

  833.     .inputs        = blend_inputs,

  834.     .outputs       = blend_outputs,

  835.     .priv_class    = &blend_class,

  836.     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,

  837. };

  838. 

  839. #endif

  840. 

  841. #if CONFIG_TBLEND_FILTER

  842. 

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

  844. {

  845.     AVFilterContext *ctx = inlink->dst;

  846.     BlendContext *s = ctx->priv;

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

  848. 

  849.     if (s->prev_frame) {

  850.         AVFrame *out;

  851. 

  852.         if (ctx->is_disabled)

  853.             out = av_frame_clone(frame);

  854.         else

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

  856.         av_frame_free(&s->prev_frame);

  857.         s->prev_frame = frame;

  858.         return ff_filter_frame(outlink, out);

  859.     }

  860.     s->prev_frame = frame;

  861.     return 0;

  862. }

  863. 

  864. static const AVOption tblend_options[] = {

  865.     COMMON_OPTIONS,

  866.     { NULL }

  867. };

  868. 

  869. AVFILTER_DEFINE_CLASS(tblend);

  870. 

  871. static const AVFilterPad tblend_inputs[] = {

  872.     {

  873.         .name          = "default",

  874.         .type          = AVMEDIA_TYPE_VIDEO,

  875.         .filter_frame  = tblend_filter_frame,

  876.     },

  877.     { NULL }

  878. };

  879. 

  880. static const AVFilterPad tblend_outputs[] = {

  881.     {

  882.         .name          = "default",

  883.         .type          = AVMEDIA_TYPE_VIDEO,

  884.         .config_props  = config_output,

  885.     },

  886.     { NULL }

  887. };

  888. 

  889. AVFilter ff_vf_tblend = {

  890.     .name          = "tblend",

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

  892.     .priv_size     = sizeof(BlendContext),

  893.     .priv_class    = &tblend_class,

  894.     .query_formats = query_formats,

  895.     .init          = init,

  896.     .uninit        = uninit,

  897.     .inputs        = tblend_inputs,

  898.     .outputs       = tblend_outputs,

  899.     .flags         = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,

  900. };

  901. 

  902. #endif