It is supposed to be free of side effects. Do it in init instead.
Showing the changes to libavfilter (1 of 1 file). Show all
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| @@ -160,6 +160,58 @@ static void show_life_grid(AVFilterContext *ctx) · 159 unmodified lines | |||
| 160 | } | 160 | } |
| 161 | #endif | 161 | #endif |
| 162 | 162 | ||
| 163 | static void fill_picture_monoblack(AVFilterContext *ctx, AVFrame *picref) | ||
| 164 | { | ||
| 165 | LifeContext *life = ctx->priv; | ||
| 166 | uint8_t *buf = life->buf[life->buf_idx]; | ||
| 167 | int i, j, k; | ||
| 168 | |||
| 169 | /* fill the output picture with the old grid buffer */ | ||
| 170 | for (i = 0; i < life->h; i++) { | ||
| 171 | uint8_t byte = 0; | ||
| 172 | uint8_t *p = picref->data[0] + i * picref->linesize[0]; | ||
| 173 | for (k = 0, j = 0; j < life->w; j++) { | ||
| 174 | byte |= (buf[i*life->w+j] == ALIVE_CELL)<<(7-k++); | ||
| 175 | if (k==8 || j == life->w-1) { | ||
| 176 | k = 0; | ||
| 177 | *p++ = byte; | ||
| 178 | byte = 0; | ||
| 179 | } | ||
| 180 | } | ||
| 181 | } | ||
| 182 | } | ||
| 183 | |||
| 184 | // divide by 255 and round to nearest | ||
| 185 | // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 | ||
| 186 | #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) | ||
| 187 | |||
| 188 | static void fill_picture_rgb(AVFilterContext *ctx, AVFrame *picref) | ||
| 189 | { | ||
| 190 | LifeContext *life = ctx->priv; | ||
| 191 | uint8_t *buf = life->buf[life->buf_idx]; | ||
| 192 | int i, j; | ||
| 193 | |||
| 194 | /* fill the output picture with the old grid buffer */ | ||
| 195 | for (i = 0; i < life->h; i++) { | ||
| 196 | uint8_t *p = picref->data[0] + i * picref->linesize[0]; | ||
| 197 | for (j = 0; j < life->w; j++) { | ||
| 198 | uint8_t v = buf[i*life->w + j]; | ||
| 199 | if (life->mold && v != ALIVE_CELL) { | ||
| 200 | const uint8_t *c1 = life-> mold_color; | ||
| 201 | const uint8_t *c2 = life->death_color; | ||
| 202 | int death_age = FFMIN((0xff - v) * life->mold, 0xff); | ||
| 203 | *p++ = FAST_DIV255((c2[0] << 8) + ((int)c1[0] - (int)c2[0]) * death_age); | ||
| 204 | *p++ = FAST_DIV255((c2[1] << 8) + ((int)c1[1] - (int)c2[1]) * death_age); | ||
| 205 | *p++ = FAST_DIV255((c2[2] << 8) + ((int)c1[2] - (int)c2[2]) * death_age); | ||
| 206 | } else { | ||
| 207 | const uint8_t *c = v == ALIVE_CELL ? life->life_color : life->death_color; | ||
| 208 | AV_WB24(p, c[0]<<16 | c[1]<<8 | c[2]); | ||
| 209 | p += 3; | ||
| 210 | } | ||
| 211 | } | ||
| 212 | } | ||
| 213 | } | ||
| 214 | |||
| 163 | static int init_pattern_from_file(AVFilterContext *ctx) | 215 | static int init_pattern_from_file(AVFilterContext *ctx) |
| 164 | { | 216 | { |
| 165 | LifeContext *life = ctx->priv; | 217 | LifeContext *life = ctx->priv; |
| @@ -259,6 +311,13 @@ static av_cold int init(AVFilterContext *ctx) · 93 unmodified lines | |||
| 259 | return ret; | 311 | return ret; |
| 260 | } | 312 | } |
| 261 | 313 | ||
| 314 | if (life->mold || memcmp(life-> life_color, "\xff\xff\xff", 3) | ||
| 315 | || memcmp(life->death_color, "\x00\x00\x00", 3)) { | ||
| 316 | life->draw = fill_picture_rgb; | ||
| 317 | } else { | ||
| 318 | life->draw = fill_picture_monoblack; | ||
| 319 | } | ||
| 320 | |||
| 262 | av_log(ctx, AV_LOG_VERBOSE, | 321 | av_log(ctx, AV_LOG_VERBOSE, |
| 263 | "s:%dx%d r:%d/%d rule:%s stay_rule:%d born_rule:%d stitch:%d seed:%"PRId64"\n", | 322 | "s:%dx%d r:%d/%d rule:%s stay_rule:%d born_rule:%d stitch:%d seed:%"PRId64"\n", |
| 264 | life->w, life->h, life->frame_rate.num, life->frame_rate.den, | 323 | life->w, life->h, life->frame_rate.num, life->frame_rate.den, |
| @@ -345,58 +404,6 @@ static void evolve(AVFilterContext *ctx) · 80 unmodified lines | |||
| 345 | life->buf_idx = !life->buf_idx; | 404 | life->buf_idx = !life->buf_idx; |
| 346 | } | 405 | } |
| 347 | 406 | ||
| 348 | static void fill_picture_monoblack(AVFilterContext *ctx, AVFrame *picref) | ||
| 349 | { | ||
| 350 | LifeContext *life = ctx->priv; | ||
| 351 | uint8_t *buf = life->buf[life->buf_idx]; | ||
| 352 | int i, j, k; | ||
| 353 | |||
| 354 | /* fill the output picture with the old grid buffer */ | ||
| 355 | for (i = 0; i < life->h; i++) { | ||
| 356 | uint8_t byte = 0; | ||
| 357 | uint8_t *p = picref->data[0] + i * picref->linesize[0]; | ||
| 358 | for (k = 0, j = 0; j < life->w; j++) { | ||
| 359 | byte |= (buf[i*life->w+j] == ALIVE_CELL)<<(7-k++); | ||
| 360 | if (k==8 || j == life->w-1) { | ||
| 361 | k = 0; | ||
| 362 | *p++ = byte; | ||
| 363 | byte = 0; | ||
| 364 | } | ||
| 365 | } | ||
| 366 | } | ||
| 367 | } | ||
| 368 | |||
| 369 | // divide by 255 and round to nearest | ||
| 370 | // apply a fast variant: (X+127)/255 = ((X+127)*257+257)>>16 = ((X+128)*257)>>16 | ||
| 371 | #define FAST_DIV255(x) ((((x) + 128) * 257) >> 16) | ||
| 372 | |||
| 373 | static void fill_picture_rgb(AVFilterContext *ctx, AVFrame *picref) | ||
| 374 | { | ||
| 375 | LifeContext *life = ctx->priv; | ||
| 376 | uint8_t *buf = life->buf[life->buf_idx]; | ||
| 377 | int i, j; | ||
| 378 | |||
| 379 | /* fill the output picture with the old grid buffer */ | ||
| 380 | for (i = 0; i < life->h; i++) { | ||
| 381 | uint8_t *p = picref->data[0] + i * picref->linesize[0]; | ||
| 382 | for (j = 0; j < life->w; j++) { | ||
| 383 | uint8_t v = buf[i*life->w + j]; | ||
| 384 | if (life->mold && v != ALIVE_CELL) { | ||
| 385 | const uint8_t *c1 = life-> mold_color; | ||
| 386 | const uint8_t *c2 = life->death_color; | ||
| 387 | int death_age = FFMIN((0xff - v) * life->mold, 0xff); | ||
| 388 | *p++ = FAST_DIV255((c2[0] << 8) + ((int)c1[0] - (int)c2[0]) * death_age); | ||
| 389 | *p++ = FAST_DIV255((c2[1] << 8) + ((int)c1[1] - (int)c2[1]) * death_age); | ||
| 390 | *p++ = FAST_DIV255((c2[2] << 8) + ((int)c1[2] - (int)c2[2]) * death_age); | ||
| 391 | } else { | ||
| 392 | const uint8_t *c = v == ALIVE_CELL ? life->life_color : life->death_color; | ||
| 393 | AV_WB24(p, c[0]<<16 | c[1]<<8 | c[2]); | ||
| 394 | p += 3; | ||
| 395 | } | ||
| 396 | } | ||
| 397 | } | ||
| 398 | } | ||
| 399 | |||
| 400 | static int request_frame(AVFilterLink *outlink) | 407 | static int request_frame(AVFilterLink *outlink) |
| 401 | { | 408 | { |
| 402 | LifeContext *life = outlink->src->priv; | 409 | LifeContext *life = outlink->src->priv; |
| @@ -418,16 +425,10 @@ static int request_frame(AVFilterLink *outlink) · 15 unmodified lines | |||
| 418 | static int query_formats(AVFilterContext *ctx) | 425 | static int query_formats(AVFilterContext *ctx) |
| 419 | { | 426 | { |
| 420 | LifeContext *life = ctx->priv; | 427 | LifeContext *life = ctx->priv; |
| 421 | enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_NONE, AV_PIX_FMT_NONE }; | 428 | const enum AVPixelFormat pix_fmts[] = { |
| 422 | 429 | life->draw == fill_picture_rgb ? AV_PIX_FMT_RGB24 : AV_PIX_FMT_MONOBLACK, | |
| 423 | if (life->mold || memcmp(life-> life_color, "\xff\xff\xff", 3) | 430 | AV_PIX_FMT_NONE |
| 424 | || memcmp(life->death_color, "\x00\x00\x00", 3)) { | 431 | }; |
| 425 | pix_fmts[0] = AV_PIX_FMT_RGB24; | ||
| 426 | life->draw = fill_picture_rgb; | ||
| 427 | } else { | ||
| 428 | pix_fmts[0] = AV_PIX_FMT_MONOBLACK; | ||
| 429 | life->draw = fill_picture_monoblack; | ||
| 430 | } | ||
| 431 | 432 | ||
| 432 | return ff_set_common_formats_from_list(ctx, pix_fmts); | 433 | return ff_set_common_formats_from_list(ctx, pix_fmts); |
| 433 | } | 434 | } |