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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. #include "libavutil/imgutils.h"
  21. #include "libavutil/eval.h"
  22. #include "libavutil/opt.h"
  23. #include "libavutil/pixfmt.h"
  24. #include "avfilter.h"
  25. #include "bufferqueue.h"
  26. #include "formats.h"
  27. #include "internal.h"
  28. #include "dualinput.h"
  29. #include "video.h"
  30. #include "blend.h"
  31. #define TOP 0
  32. #define BOTTOM 1
  33. typedef struct BlendContext {
  34. const AVClass *class;
  35. FFDualInputContext dinput;
  36. int hsub, vsub; ///< chroma subsampling values
  37. int nb_planes;
  38. char *all_expr;
  39. enum BlendMode all_mode;
  40. double all_opacity;
  41. FilterParams params[4];
  42. int tblend;
  43. AVFrame *prev_frame; /* only used with tblend */
  44. } BlendContext;
  45. static const char *const var_names[] = { "X", "Y", "W", "H", "SW", "SH", "T", "N", "A", "B", "TOP", "BOTTOM", NULL };
  46. 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 };
  47. typedef struct ThreadData {
  48. const AVFrame *top, *bottom;
  49. AVFrame *dst;
  50. AVFilterLink *inlink;
  51. int plane;
  52. int w, h;
  53. FilterParams *param;
  54. } ThreadData;
  55. #define COMMON_OPTIONS \
  56. { "c0_mode", "set component #0 blend mode", OFFSET(params[0].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
  57. { "c1_mode", "set component #1 blend mode", OFFSET(params[1].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
  58. { "c2_mode", "set component #2 blend mode", OFFSET(params[2].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
  59. { "c3_mode", "set component #3 blend mode", OFFSET(params[3].mode), AV_OPT_TYPE_INT, {.i64=0}, 0, BLEND_NB-1, FLAGS, "mode"},\
  60. { "all_mode", "set blend mode for all components", OFFSET(all_mode), AV_OPT_TYPE_INT, {.i64=-1},-1, BLEND_NB-1, FLAGS, "mode"},\
  61. { "addition", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION}, 0, 0, FLAGS, "mode" },\
  62. { "addition128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_ADDITION128}, 0, 0, FLAGS, "mode" },\
  63. { "and", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AND}, 0, 0, FLAGS, "mode" },\
  64. { "average", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_AVERAGE}, 0, 0, FLAGS, "mode" },\
  65. { "burn", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_BURN}, 0, 0, FLAGS, "mode" },\
  66. { "darken", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DARKEN}, 0, 0, FLAGS, "mode" },\
  67. { "difference", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE}, 0, 0, FLAGS, "mode" },\
  68. { "difference128", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIFFERENCE128}, 0, 0, FLAGS, "mode" },\
  69. { "divide", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DIVIDE}, 0, 0, FLAGS, "mode" },\
  70. { "dodge", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_DODGE}, 0, 0, FLAGS, "mode" },\
  71. { "exclusion", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_EXCLUSION}, 0, 0, FLAGS, "mode" },\
  72. { "glow", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_GLOW}, 0, 0, FLAGS, "mode" },\
  73. { "hardlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDLIGHT}, 0, 0, FLAGS, "mode" },\
  74. { "hardmix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_HARDMIX}, 0, 0, FLAGS, "mode" },\
  75. { "lighten", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LIGHTEN}, 0, 0, FLAGS, "mode" },\
  76. { "linearlight","", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_LINEARLIGHT},0, 0, FLAGS, "mode" },\
  77. { "multiply", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_MULTIPLY}, 0, 0, FLAGS, "mode" },\
  78. { "negation", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NEGATION}, 0, 0, FLAGS, "mode" },\
  79. { "normal", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_NORMAL}, 0, 0, FLAGS, "mode" },\
  80. { "or", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OR}, 0, 0, FLAGS, "mode" },\
  81. { "overlay", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_OVERLAY}, 0, 0, FLAGS, "mode" },\
  82. { "phoenix", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PHOENIX}, 0, 0, FLAGS, "mode" },\
  83. { "pinlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_PINLIGHT}, 0, 0, FLAGS, "mode" },\
  84. { "reflect", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_REFLECT}, 0, 0, FLAGS, "mode" },\
  85. { "screen", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SCREEN}, 0, 0, FLAGS, "mode" },\
  86. { "softlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SOFTLIGHT}, 0, 0, FLAGS, "mode" },\
  87. { "subtract", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_SUBTRACT}, 0, 0, FLAGS, "mode" },\
  88. { "vividlight", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_VIVIDLIGHT}, 0, 0, FLAGS, "mode" },\
  89. { "xor", "", 0, AV_OPT_TYPE_CONST, {.i64=BLEND_XOR}, 0, 0, FLAGS, "mode" },\
  90. { "c0_expr", "set color component #0 expression", OFFSET(params[0].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
  91. { "c1_expr", "set color component #1 expression", OFFSET(params[1].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
  92. { "c2_expr", "set color component #2 expression", OFFSET(params[2].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
  93. { "c3_expr", "set color component #3 expression", OFFSET(params[3].expr_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
  94. { "all_expr", "set expression for all color components", OFFSET(all_expr), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, FLAGS },\
  95. { "c0_opacity", "set color component #0 opacity", OFFSET(params[0].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
  96. { "c1_opacity", "set color component #1 opacity", OFFSET(params[1].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
  97. { "c2_opacity", "set color component #2 opacity", OFFSET(params[2].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
  98. { "c3_opacity", "set color component #3 opacity", OFFSET(params[3].opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS },\
  99. { "all_opacity", "set opacity for all color components", OFFSET(all_opacity), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS}
  100. #define OFFSET(x) offsetof(BlendContext, x)
  101. #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
  102. static const AVOption blend_options[] = {
  103. COMMON_OPTIONS,
  104. { "shortest", "force termination when the shortest input terminates", OFFSET(dinput.shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
  105. { "repeatlast", "repeat last bottom frame", OFFSET(dinput.repeatlast), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
  106. { NULL }
  107. };
  108. AVFILTER_DEFINE_CLASS(blend);
  109. static void blend_normal(const uint8_t *top, ptrdiff_t top_linesize,
  110. const uint8_t *bottom, ptrdiff_t bottom_linesize,
  111. uint8_t *dst, ptrdiff_t dst_linesize,
  112. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
  113. FilterParams *param, double *values)
  114. {
  115. av_image_copy_plane(dst, dst_linesize, top, top_linesize, width, end - start);
  116. }
  117. static void blend_normal_8bit(const uint8_t *top, ptrdiff_t top_linesize,
  118. const uint8_t *bottom, ptrdiff_t bottom_linesize,
  119. uint8_t *dst, ptrdiff_t dst_linesize,
  120. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
  121. FilterParams *param, double *values)
  122. {
  123. const double opacity = param->opacity;
  124. int i, j;
  125. for (i = start; i < end; i++) {
  126. for (j = 0; j < width; j++) {
  127. dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
  128. }
  129. dst += dst_linesize;
  130. top += top_linesize;
  131. bottom += bottom_linesize;
  132. }
  133. }
  134. static void blend_normal_16bit(const uint8_t *_top, ptrdiff_t top_linesize,
  135. const uint8_t *_bottom, ptrdiff_t bottom_linesize,
  136. uint8_t *_dst, ptrdiff_t dst_linesize,
  137. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end,
  138. FilterParams *param, double *values)
  139. {
  140. const uint16_t *top = (uint16_t*)_top;
  141. const uint16_t *bottom = (uint16_t*)_bottom;
  142. uint16_t *dst = (uint16_t*)_dst;
  143. const double opacity = param->opacity;
  144. int i, j;
  145. dst_linesize /= 2;
  146. top_linesize /= 2;
  147. bottom_linesize /= 2;
  148. for (i = start; i < end; i++) {
  149. for (j = 0; j < width; j++) {
  150. dst[j] = top[j] * opacity + bottom[j] * (1. - opacity);
  151. }
  152. dst += dst_linesize;
  153. top += top_linesize;
  154. bottom += bottom_linesize;
  155. }
  156. }
  157. #define DEFINE_BLEND8(name, expr) \
  158. static void blend_## name##_8bit(const uint8_t *top, ptrdiff_t top_linesize, \
  159. const uint8_t *bottom, ptrdiff_t bottom_linesize, \
  160. uint8_t *dst, ptrdiff_t dst_linesize, \
  161. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
  162. FilterParams *param, double *values) \
  163. { \
  164. double opacity = param->opacity; \
  165. int i, j; \
  166. \
  167. for (i = start; i < end; i++) { \
  168. for (j = 0; j < width; j++) { \
  169. dst[j] = top[j] + ((expr) - top[j]) * opacity; \
  170. } \
  171. dst += dst_linesize; \
  172. top += top_linesize; \
  173. bottom += bottom_linesize; \
  174. } \
  175. }
  176. #define DEFINE_BLEND16(name, expr) \
  177. static void blend_## name##_16bit(const uint8_t *_top, ptrdiff_t top_linesize, \
  178. const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
  179. uint8_t *_dst, ptrdiff_t dst_linesize, \
  180. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
  181. FilterParams *param, double *values) \
  182. { \
  183. const uint16_t *top = (uint16_t*)_top; \
  184. const uint16_t *bottom = (uint16_t*)_bottom; \
  185. uint16_t *dst = (uint16_t*)_dst; \
  186. double opacity = param->opacity; \
  187. int i, j; \
  188. dst_linesize /= 2; \
  189. top_linesize /= 2; \
  190. bottom_linesize /= 2; \
  191. \
  192. for (i = start; i < end; i++) { \
  193. for (j = 0; j < width; j++) { \
  194. dst[j] = top[j] + ((expr) - top[j]) * opacity; \
  195. } \
  196. dst += dst_linesize; \
  197. top += top_linesize; \
  198. bottom += bottom_linesize; \
  199. } \
  200. }
  201. #define A top[j]
  202. #define B bottom[j]
  203. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 255))
  204. #define SCREEN(x, a, b) (255 - (x) * ((255 - (a)) * (255 - (b)) / 255))
  205. #define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 255 - ((255 - (b)) << 8) / (a)))
  206. #define DODGE(a, b) (((a) == 255) ? (a) : FFMIN(255, (((b) << 8) / (255 - (a)))))
  207. DEFINE_BLEND8(addition, FFMIN(255, A + B))
  208. DEFINE_BLEND8(addition128, av_clip_uint8(A + B - 128))
  209. DEFINE_BLEND8(average, (A + B) / 2)
  210. DEFINE_BLEND8(subtract, FFMAX(0, A - B))
  211. DEFINE_BLEND8(multiply, MULTIPLY(1, A, B))
  212. DEFINE_BLEND8(negation, 255 - FFABS(255 - A - B))
  213. DEFINE_BLEND8(difference, FFABS(A - B))
  214. DEFINE_BLEND8(difference128, av_clip_uint8(128 + A - B))
  215. DEFINE_BLEND8(screen, SCREEN(1, A, B))
  216. DEFINE_BLEND8(overlay, (A < 128) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
  217. DEFINE_BLEND8(hardlight, (B < 128) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
  218. DEFINE_BLEND8(hardmix, (A < (255 - B)) ? 0: 255)
  219. DEFINE_BLEND8(darken, FFMIN(A, B))
  220. DEFINE_BLEND8(lighten, FFMAX(A, B))
  221. DEFINE_BLEND8(divide, av_clip_uint8(((float)A / ((float)B) * 255)))
  222. DEFINE_BLEND8(dodge, DODGE(A, B))
  223. DEFINE_BLEND8(burn, BURN(A, B))
  224. 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))
  225. DEFINE_BLEND8(exclusion, A + B - 2 * A * B / 255)
  226. DEFINE_BLEND8(pinlight, (B < 128) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 128)))
  227. DEFINE_BLEND8(phoenix, FFMIN(A, B) - FFMAX(A, B) + 255)
  228. DEFINE_BLEND8(reflect, (B == 255) ? B : FFMIN(255, (A * A / (255 - B))))
  229. DEFINE_BLEND8(glow, (A == 255) ? A : FFMIN(255, (B * B / (255 - A))))
  230. DEFINE_BLEND8(and, A & B)
  231. DEFINE_BLEND8(or, A | B)
  232. DEFINE_BLEND8(xor, A ^ B)
  233. DEFINE_BLEND8(vividlight, (A < 128) ? BURN(2 * A, B) : DODGE(2 * (A - 128), B))
  234. DEFINE_BLEND8(linearlight,av_clip_uint8((B < 128) ? B + 2 * A - 255 : B + 2 * (A - 128)))
  235. #undef MULTIPLY
  236. #undef SCREEN
  237. #undef BURN
  238. #undef DODGE
  239. #define MULTIPLY(x, a, b) ((x) * (((a) * (b)) / 65535))
  240. #define SCREEN(x, a, b) (65535 - (x) * ((65535 - (a)) * (65535 - (b)) / 65535))
  241. #define BURN(a, b) (((a) == 0) ? (a) : FFMAX(0, 65535 - ((65535 - (b)) << 16) / (a)))
  242. #define DODGE(a, b) (((a) == 65535) ? (a) : FFMIN(65535, (((b) << 16) / (65535 - (a)))))
  243. DEFINE_BLEND16(addition, FFMIN(65535, A + B))
  244. DEFINE_BLEND16(addition128, av_clip_uint16(A + B - 32768))
  245. DEFINE_BLEND16(average, (A + B) / 2)
  246. DEFINE_BLEND16(subtract, FFMAX(0, A - B))
  247. DEFINE_BLEND16(multiply, MULTIPLY(1, A, B))
  248. DEFINE_BLEND16(negation, 65535 - FFABS(65535 - A - B))
  249. DEFINE_BLEND16(difference, FFABS(A - B))
  250. DEFINE_BLEND16(difference128, av_clip_uint16(32768 + A - B))
  251. DEFINE_BLEND16(screen, SCREEN(1, A, B))
  252. DEFINE_BLEND16(overlay, (A < 32768) ? MULTIPLY(2, A, B) : SCREEN(2, A, B))
  253. DEFINE_BLEND16(hardlight, (B < 32768) ? MULTIPLY(2, B, A) : SCREEN(2, B, A))
  254. DEFINE_BLEND16(hardmix, (A < (65535 - B)) ? 0: 65535)
  255. DEFINE_BLEND16(darken, FFMIN(A, B))
  256. DEFINE_BLEND16(lighten, FFMAX(A, B))
  257. DEFINE_BLEND16(divide, av_clip_uint16(((float)A / ((float)B) * 65535)))
  258. DEFINE_BLEND16(dodge, DODGE(A, B))
  259. DEFINE_BLEND16(burn, BURN(A, B))
  260. 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))
  261. DEFINE_BLEND16(exclusion, A + B - 2 * A * B / 65535)
  262. DEFINE_BLEND16(pinlight, (B < 32768) ? FFMIN(A, 2 * B) : FFMAX(A, 2 * (B - 32768)))
  263. DEFINE_BLEND16(phoenix, FFMIN(A, B) - FFMAX(A, B) + 65535)
  264. DEFINE_BLEND16(reflect, (B == 65535) ? B : FFMIN(65535, (A * A / (65535 - B))))
  265. DEFINE_BLEND16(glow, (A == 65535) ? A : FFMIN(65535, (B * B / (65535 - A))))
  266. DEFINE_BLEND16(and, A & B)
  267. DEFINE_BLEND16(or, A | B)
  268. DEFINE_BLEND16(xor, A ^ B)
  269. DEFINE_BLEND16(vividlight, (A < 32768) ? BURN(2 * A, B) : DODGE(2 * (A - 32768), B))
  270. DEFINE_BLEND16(linearlight,av_clip_uint16((B < 32768) ? B + 2 * A - 65535 : B + 2 * (A - 32768)))
  271. #define DEFINE_BLEND_EXPR(type, name, div) \
  272. static void blend_expr_## name(const uint8_t *_top, ptrdiff_t top_linesize, \
  273. const uint8_t *_bottom, ptrdiff_t bottom_linesize, \
  274. uint8_t *_dst, ptrdiff_t dst_linesize, \
  275. ptrdiff_t width, ptrdiff_t start, ptrdiff_t end, \
  276. FilterParams *param, double *values) \
  277. { \
  278. const type *top = (type*)_top; \
  279. const type *bottom = (type*)_bottom; \
  280. type *dst = (type*)_dst; \
  281. AVExpr *e = param->e; \
  282. int y, x; \
  283. dst_linesize /= div; \
  284. top_linesize /= div; \
  285. bottom_linesize /= div; \
  286. \
  287. for (y = start; y < end; y++) { \
  288. values[VAR_Y] = y; \
  289. for (x = 0; x < width; x++) { \
  290. values[VAR_X] = x; \
  291. values[VAR_TOP] = values[VAR_A] = top[x]; \
  292. values[VAR_BOTTOM] = values[VAR_B] = bottom[x]; \
  293. dst[x] = av_expr_eval(e, values, NULL); \
  294. } \
  295. dst += dst_linesize; \
  296. top += top_linesize; \
  297. bottom += bottom_linesize; \
  298. } \
  299. }
  300. DEFINE_BLEND_EXPR(uint8_t, 8bit, 1)
  301. DEFINE_BLEND_EXPR(uint16_t, 16bit, 2)
  302. static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
  303. {
  304. ThreadData *td = arg;
  305. int slice_start = (td->h * jobnr ) / nb_jobs;
  306. int slice_end = (td->h * (jobnr+1)) / nb_jobs;
  307. const uint8_t *top = td->top->data[td->plane];
  308. const uint8_t *bottom = td->bottom->data[td->plane];
  309. uint8_t *dst = td->dst->data[td->plane];
  310. double values[VAR_VARS_NB];
  311. values[VAR_N] = td->inlink->frame_count;
  312. values[VAR_T] = td->dst->pts == AV_NOPTS_VALUE ? NAN : td->dst->pts * av_q2d(td->inlink->time_base);
  313. values[VAR_W] = td->w;
  314. values[VAR_H] = td->h;
  315. values[VAR_SW] = td->w / (double)td->dst->width;
  316. values[VAR_SH] = td->h / (double)td->dst->height;
  317. td->param->blend(top + slice_start * td->top->linesize[td->plane],
  318. td->top->linesize[td->plane],
  319. bottom + slice_start * td->bottom->linesize[td->plane],
  320. td->bottom->linesize[td->plane],
  321. dst + slice_start * td->dst->linesize[td->plane],
  322. td->dst->linesize[td->plane],
  323. td->w, slice_start, slice_end, td->param, &values[0]);
  324. return 0;
  325. }
  326. static AVFrame *blend_frame(AVFilterContext *ctx, AVFrame *top_buf,
  327. const AVFrame *bottom_buf)
  328. {
  329. BlendContext *s = ctx->priv;
  330. AVFilterLink *inlink = ctx->inputs[0];
  331. AVFilterLink *outlink = ctx->outputs[0];
  332. AVFrame *dst_buf;
  333. int plane;
  334. dst_buf = ff_get_video_buffer(outlink, outlink->w, outlink->h);
  335. if (!dst_buf)
  336. return top_buf;
  337. av_frame_copy_props(dst_buf, top_buf);
  338. for (plane = 0; plane < s->nb_planes; plane++) {
  339. int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
  340. int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
  341. int outw = FF_CEIL_RSHIFT(dst_buf->width, hsub);
  342. int outh = FF_CEIL_RSHIFT(dst_buf->height, vsub);
  343. FilterParams *param = &s->params[plane];
  344. ThreadData td = { .top = top_buf, .bottom = bottom_buf, .dst = dst_buf,
  345. .w = outw, .h = outh, .param = param, .plane = plane,
  346. .inlink = inlink };
  347. ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outh, ctx->graph->nb_threads));
  348. }
  349. if (!s->tblend)
  350. av_frame_free(&top_buf);
  351. return dst_buf;
  352. }
  353. static av_cold int init(AVFilterContext *ctx)
  354. {
  355. BlendContext *s = ctx->priv;
  356. s->tblend = !strcmp(ctx->filter->name, "tblend");
  357. s->dinput.process = blend_frame;
  358. return 0;
  359. }
  360. static int query_formats(AVFilterContext *ctx)
  361. {
  362. static const enum AVPixelFormat pix_fmts[] = {
  363. AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
  364. AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P,AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
  365. AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
  366. AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, AV_PIX_FMT_GRAY8,
  367. AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
  368. AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
  369. AV_PIX_FMT_GBRP16, AV_PIX_FMT_GRAY16,
  370. AV_PIX_FMT_NONE
  371. };
  372. AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
  373. if (!fmts_list)
  374. return AVERROR(ENOMEM);
  375. return ff_set_common_formats(ctx, fmts_list);
  376. }
  377. static av_cold void uninit(AVFilterContext *ctx)
  378. {
  379. BlendContext *s = ctx->priv;
  380. int i;
  381. ff_dualinput_uninit(&s->dinput);
  382. av_frame_free(&s->prev_frame);
  383. for (i = 0; i < FF_ARRAY_ELEMS(s->params); i++)
  384. av_expr_free(s->params[i].e);
  385. }
  386. static int config_output(AVFilterLink *outlink)
  387. {
  388. AVFilterContext *ctx = outlink->src;
  389. AVFilterLink *toplink = ctx->inputs[TOP];
  390. BlendContext *s = ctx->priv;
  391. const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(toplink->format);
  392. int ret, plane, is_16bit;
  393. if (!s->tblend) {
  394. AVFilterLink *bottomlink = ctx->inputs[BOTTOM];
  395. if (toplink->format != bottomlink->format) {
  396. av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
  397. return AVERROR(EINVAL);
  398. }
  399. if (toplink->w != bottomlink->w ||
  400. toplink->h != bottomlink->h ||
  401. toplink->sample_aspect_ratio.num != bottomlink->sample_aspect_ratio.num ||
  402. toplink->sample_aspect_ratio.den != bottomlink->sample_aspect_ratio.den) {
  403. av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
  404. "(size %dx%d, SAR %d:%d) do not match the corresponding "
  405. "second input link %s parameters (%dx%d, SAR %d:%d)\n",
  406. ctx->input_pads[TOP].name, toplink->w, toplink->h,
  407. toplink->sample_aspect_ratio.num,
  408. toplink->sample_aspect_ratio.den,
  409. ctx->input_pads[BOTTOM].name, bottomlink->w, bottomlink->h,
  410. bottomlink->sample_aspect_ratio.num,
  411. bottomlink->sample_aspect_ratio.den);
  412. return AVERROR(EINVAL);
  413. }
  414. }
  415. outlink->w = toplink->w;
  416. outlink->h = toplink->h;
  417. outlink->time_base = toplink->time_base;
  418. outlink->sample_aspect_ratio = toplink->sample_aspect_ratio;
  419. outlink->frame_rate = toplink->frame_rate;
  420. s->hsub = pix_desc->log2_chroma_w;
  421. s->vsub = pix_desc->log2_chroma_h;
  422. is_16bit = pix_desc->comp[0].depth == 16;
  423. s->nb_planes = av_pix_fmt_count_planes(toplink->format);
  424. if (!s->tblend)
  425. if ((ret = ff_dualinput_init(ctx, &s->dinput)) < 0)
  426. return ret;
  427. for (plane = 0; plane < FF_ARRAY_ELEMS(s->params); plane++) {
  428. FilterParams *param = &s->params[plane];
  429. if (s->all_mode >= 0)
  430. param->mode = s->all_mode;
  431. if (s->all_opacity < 1)
  432. param->opacity = s->all_opacity;
  433. switch (param->mode) {
  434. case BLEND_ADDITION: param->blend = is_16bit ? blend_addition_16bit : blend_addition_8bit; break;
  435. case BLEND_ADDITION128: param->blend = is_16bit ? blend_addition128_16bit : blend_addition128_8bit; break;
  436. case BLEND_AND: param->blend = is_16bit ? blend_and_16bit : blend_and_8bit; break;
  437. case BLEND_AVERAGE: param->blend = is_16bit ? blend_average_16bit : blend_average_8bit; break;
  438. case BLEND_BURN: param->blend = is_16bit ? blend_burn_16bit : blend_burn_8bit; break;
  439. case BLEND_DARKEN: param->blend = is_16bit ? blend_darken_16bit : blend_darken_8bit; break;
  440. case BLEND_DIFFERENCE: param->blend = is_16bit ? blend_difference_16bit : blend_difference_8bit; break;
  441. case BLEND_DIFFERENCE128: param->blend = is_16bit ? blend_difference128_16bit: blend_difference128_8bit; break;
  442. case BLEND_DIVIDE: param->blend = is_16bit ? blend_divide_16bit : blend_divide_8bit; break;
  443. case BLEND_DODGE: param->blend = is_16bit ? blend_dodge_16bit : blend_dodge_8bit; break;
  444. case BLEND_EXCLUSION: param->blend = is_16bit ? blend_exclusion_16bit : blend_exclusion_8bit; break;
  445. case BLEND_GLOW: param->blend = is_16bit ? blend_glow_16bit : blend_glow_8bit; break;
  446. case BLEND_HARDLIGHT: param->blend = is_16bit ? blend_hardlight_16bit : blend_hardlight_8bit; break;
  447. case BLEND_HARDMIX: param->blend = is_16bit ? blend_hardmix_16bit : blend_hardmix_8bit; break;
  448. case BLEND_LIGHTEN: param->blend = is_16bit ? blend_lighten_16bit : blend_lighten_8bit; break;
  449. case BLEND_LINEARLIGHT:param->blend = is_16bit ? blend_linearlight_16bit: blend_linearlight_8bit;break;
  450. case BLEND_MULTIPLY: param->blend = is_16bit ? blend_multiply_16bit : blend_multiply_8bit; break;
  451. case BLEND_NEGATION: param->blend = is_16bit ? blend_negation_16bit : blend_negation_8bit; break;
  452. case BLEND_NORMAL: param->blend = param->opacity == 1 ? blend_normal:
  453. is_16bit ? blend_normal_16bit : blend_normal_8bit; break;
  454. case BLEND_OR: param->blend = is_16bit ? blend_or_16bit : blend_or_8bit; break;
  455. case BLEND_OVERLAY: param->blend = is_16bit ? blend_overlay_16bit : blend_overlay_8bit; break;
  456. case BLEND_PHOENIX: param->blend = is_16bit ? blend_phoenix_16bit : blend_phoenix_8bit; break;
  457. case BLEND_PINLIGHT: param->blend = is_16bit ? blend_pinlight_16bit : blend_pinlight_8bit; break;
  458. case BLEND_REFLECT: param->blend = is_16bit ? blend_reflect_16bit : blend_reflect_8bit; break;
  459. case BLEND_SCREEN: param->blend = is_16bit ? blend_screen_16bit : blend_screen_8bit; break;
  460. case BLEND_SOFTLIGHT: param->blend = is_16bit ? blend_softlight_16bit : blend_softlight_8bit; break;
  461. case BLEND_SUBTRACT: param->blend = is_16bit ? blend_subtract_16bit : blend_subtract_8bit; break;
  462. case BLEND_VIVIDLIGHT: param->blend = is_16bit ? blend_vividlight_16bit : blend_vividlight_8bit; break;
  463. case BLEND_XOR: param->blend = is_16bit ? blend_xor_16bit : blend_xor_8bit; break;
  464. }
  465. if (ARCH_X86)
  466. ff_blend_init_x86(param, is_16bit);
  467. if (s->all_expr && !param->expr_str) {
  468. param->expr_str = av_strdup(s->all_expr);
  469. if (!param->expr_str)
  470. return AVERROR(ENOMEM);
  471. }
  472. if (param->expr_str) {
  473. ret = av_expr_parse(&param->e, param->expr_str, var_names,
  474. NULL, NULL, NULL, NULL, 0, ctx);
  475. if (ret < 0)
  476. return ret;
  477. param->blend = is_16bit? blend_expr_16bit : blend_expr_8bit;
  478. }
  479. }
  480. return 0;
  481. }
  482. #if CONFIG_BLEND_FILTER
  483. static int request_frame(AVFilterLink *outlink)
  484. {
  485. BlendContext *s = outlink->src->priv;
  486. return ff_dualinput_request_frame(&s->dinput, outlink);
  487. }
  488. static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
  489. {
  490. BlendContext *s = inlink->dst->priv;
  491. return ff_dualinput_filter_frame(&s->dinput, inlink, buf);
  492. }
  493. static const AVFilterPad blend_inputs[] = {
  494. {
  495. .name = "top",
  496. .type = AVMEDIA_TYPE_VIDEO,
  497. .filter_frame = filter_frame,
  498. },{
  499. .name = "bottom",
  500. .type = AVMEDIA_TYPE_VIDEO,
  501. .filter_frame = filter_frame,
  502. },
  503. { NULL }
  504. };
  505. static const AVFilterPad blend_outputs[] = {
  506. {
  507. .name = "default",
  508. .type = AVMEDIA_TYPE_VIDEO,
  509. .config_props = config_output,
  510. .request_frame = request_frame,
  511. },
  512. { NULL }
  513. };
  514. AVFilter ff_vf_blend = {
  515. .name = "blend",
  516. .description = NULL_IF_CONFIG_SMALL("Blend two video frames into each other."),
  517. .init = init,
  518. .uninit = uninit,
  519. .priv_size = sizeof(BlendContext),
  520. .query_formats = query_formats,
  521. .inputs = blend_inputs,
  522. .outputs = blend_outputs,
  523. .priv_class = &blend_class,
  524. .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
  525. };
  526. #endif
  527. #if CONFIG_TBLEND_FILTER
  528. static int tblend_filter_frame(AVFilterLink *inlink, AVFrame *frame)
  529. {
  530. BlendContext *s = inlink->dst->priv;
  531. AVFilterLink *outlink = inlink->dst->outputs[0];
  532. if (s->prev_frame) {
  533. AVFrame *out = blend_frame(inlink->dst, frame, s->prev_frame);
  534. av_frame_free(&s->prev_frame);
  535. s->prev_frame = frame;
  536. return ff_filter_frame(outlink, out);
  537. }
  538. s->prev_frame = frame;
  539. return 0;
  540. }
  541. static const AVOption tblend_options[] = {
  542. COMMON_OPTIONS,
  543. { NULL }
  544. };
  545. AVFILTER_DEFINE_CLASS(tblend);
  546. static const AVFilterPad tblend_inputs[] = {
  547. {
  548. .name = "default",
  549. .type = AVMEDIA_TYPE_VIDEO,
  550. .filter_frame = tblend_filter_frame,
  551. },
  552. { NULL }
  553. };
  554. static const AVFilterPad tblend_outputs[] = {
  555. {
  556. .name = "default",
  557. .type = AVMEDIA_TYPE_VIDEO,
  558. .config_props = config_output,
  559. },
  560. { NULL }
  561. };
  562. AVFilter ff_vf_tblend = {
  563. .name = "tblend",
  564. .description = NULL_IF_CONFIG_SMALL("Blend successive frames."),
  565. .priv_size = sizeof(BlendContext),
  566. .priv_class = &tblend_class,
  567. .query_formats = query_formats,
  568. .init = init,
  569. .uninit = uninit,
  570. .inputs = tblend_inputs,
  571. .outputs = tblend_outputs,
  572. .flags = AVFILTER_FLAG_SLICE_THREADS,
  573. };
  574. #endif