| 1 | /* |
| 2 | * Copyright (c) 2007 Bobby Bingham |
| 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 | /** |
| 22 | * @file |
| 23 | * scale video filter |
| 24 | */ |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <string.h> |
| 28 | |
| 29 | #include "avfilter.h" |
| 30 | #include "formats.h" |
| 31 | #include "internal.h" |
| 32 | #include "video.h" |
| 33 | #include "libavutil/avstring.h" |
| 34 | #include "libavutil/eval.h" |
| 35 | #include "libavutil/internal.h" |
| 36 | #include "libavutil/mathematics.h" |
| 37 | #include "libavutil/opt.h" |
| 38 | #include "libavutil/parseutils.h" |
| 39 | #include "libavutil/pixdesc.h" |
| 40 | #include "libavutil/imgutils.h" |
| 41 | #include "libavutil/avassert.h" |
| 42 | #include "libswscale/swscale.h" |
| 43 | |
| 44 | static const char *const var_names[] = { |
| 45 | "in_w", "iw", |
| 46 | "in_h", "ih", |
| 47 | "out_w", "ow", |
| 48 | "out_h", "oh", |
| 49 | "a", |
| 50 | "sar", |
| 51 | "dar", |
| 52 | "hsub", |
| 53 | "vsub", |
| 54 | "ohsub", |
| 55 | "ovsub", |
| 56 | NULL |
| 57 | }; |
| 58 | |
| 59 | enum var_name { |
| 60 | VAR_IN_W, VAR_IW, |
| 61 | VAR_IN_H, VAR_IH, |
| 62 | VAR_OUT_W, VAR_OW, |
| 63 | VAR_OUT_H, VAR_OH, |
| 64 | VAR_A, |
| 65 | VAR_SAR, |
| 66 | VAR_DAR, |
| 67 | VAR_HSUB, |
| 68 | VAR_VSUB, |
| 69 | VAR_OHSUB, |
| 70 | VAR_OVSUB, |
| 71 | VARS_NB |
| 72 | }; |
| 73 | |
| 74 | typedef struct ScaleContext { |
| 75 | const AVClass *class; |
| 76 | struct SwsContext *sws; ///< software scaler context |
| 77 | struct SwsContext *isws[2]; ///< software scaler context for interlaced material |
| 78 | AVDictionary *opts; |
| 79 | |
| 80 | /** |
| 81 | * New dimensions. Special values are: |
| 82 | * 0 = original width/height |
| 83 | * -1 = keep original aspect |
| 84 | * -N = try to keep aspect but make sure it is divisible by N |
| 85 | */ |
| 86 | int w, h; |
| 87 | char *size_str; |
| 88 | unsigned int flags; ///sws flags |
| 89 | |
| 90 | int hsub, vsub; ///< chroma subsampling |
| 91 | int slice_y; ///< top of current output slice |
| 92 | int input_is_pal; ///< set to 1 if the input format is paletted |
| 93 | int output_is_pal; ///< set to 1 if the output format is paletted |
| 94 | int interlaced; |
| 95 | |
| 96 | char *w_expr; ///< width expression string |
| 97 | char *h_expr; ///< height expression string |
| 98 | char *flags_str; |
| 99 | |
| 100 | char *in_color_matrix; |
| 101 | char *out_color_matrix; |
| 102 | |
| 103 | int in_range; |
| 104 | int out_range; |
| 105 | |
| 106 | int out_h_chr_pos; |
| 107 | int out_v_chr_pos; |
| 108 | int in_h_chr_pos; |
| 109 | int in_v_chr_pos; |
| 110 | |
| 111 | int force_original_aspect_ratio; |
| 112 | } ScaleContext; |
| 113 | |
| 114 | static av_cold int init_dict(AVFilterContext *ctx, AVDictionary **opts) |
| 115 | { |
| 116 | ScaleContext *scale = ctx->priv; |
| 117 | int ret; |
| 118 | |
| 119 | if (scale->size_str && (scale->w_expr || scale->h_expr)) { |
| 120 | av_log(ctx, AV_LOG_ERROR, |
| 121 | "Size and width/height expressions cannot be set at the same time.\n"); |
| 122 | return AVERROR(EINVAL); |
| 123 | } |
| 124 | |
| 125 | if (scale->w_expr && !scale->h_expr) |
| 126 | FFSWAP(char *, scale->w_expr, scale->size_str); |
| 127 | |
| 128 | if (scale->size_str) { |
| 129 | char buf[32]; |
| 130 | if ((ret = av_parse_video_size(&scale->w, &scale->h, scale->size_str)) < 0) { |
| 131 | av_log(ctx, AV_LOG_ERROR, |
| 132 | "Invalid size '%s'\n", scale->size_str); |
| 133 | return ret; |
| 134 | } |
| 135 | snprintf(buf, sizeof(buf)-1, "%d", scale->w); |
| 136 | av_opt_set(scale, "w", buf, 0); |
| 137 | snprintf(buf, sizeof(buf)-1, "%d", scale->h); |
| 138 | av_opt_set(scale, "h", buf, 0); |
| 139 | } |
| 140 | if (!scale->w_expr) |
| 141 | av_opt_set(scale, "w", "iw", 0); |
| 142 | if (!scale->h_expr) |
| 143 | av_opt_set(scale, "h", "ih", 0); |
| 144 | |
| 145 | av_log(ctx, AV_LOG_VERBOSE, "w:%s h:%s flags:'%s' interl:%d\n", |
| 146 | scale->w_expr, scale->h_expr, (char *)av_x_if_null(scale->flags_str, ""), scale->interlaced); |
| 147 | |
| 148 | scale->flags = 0; |
| 149 | |
| 150 | if (scale->flags_str) { |
| 151 | const AVClass *class = sws_get_class(); |
| 152 | const AVOption *o = av_opt_find(&class, "sws_flags", NULL, 0, |
| 153 | AV_OPT_SEARCH_FAKE_OBJ); |
| 154 | int ret = av_opt_eval_flags(&class, o, scale->flags_str, &scale->flags); |
| 155 | if (ret < 0) |
| 156 | return ret; |
| 157 | } |
| 158 | scale->opts = *opts; |
| 159 | *opts = NULL; |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | static av_cold void uninit(AVFilterContext *ctx) |
| 165 | { |
| 166 | ScaleContext *scale = ctx->priv; |
| 167 | sws_freeContext(scale->sws); |
| 168 | sws_freeContext(scale->isws[0]); |
| 169 | sws_freeContext(scale->isws[1]); |
| 170 | scale->sws = NULL; |
| 171 | av_dict_free(&scale->opts); |
| 172 | } |
| 173 | |
| 174 | static int query_formats(AVFilterContext *ctx) |
| 175 | { |
| 176 | AVFilterFormats *formats; |
| 177 | enum AVPixelFormat pix_fmt; |
| 178 | int ret; |
| 179 | |
| 180 | if (ctx->inputs[0]) { |
| 181 | const AVPixFmtDescriptor *desc = NULL; |
| 182 | formats = NULL; |
| 183 | while ((desc = av_pix_fmt_desc_next(desc))) { |
| 184 | pix_fmt = av_pix_fmt_desc_get_id(desc); |
| 185 | if ((sws_isSupportedInput(pix_fmt) || |
| 186 | sws_isSupportedEndiannessConversion(pix_fmt)) |
| 187 | && (ret = ff_add_format(&formats, pix_fmt)) < 0) { |
| 188 | ff_formats_unref(&formats); |
| 189 | return ret; |
| 190 | } |
| 191 | } |
| 192 | ff_formats_ref(formats, &ctx->inputs[0]->out_formats); |
| 193 | } |
| 194 | if (ctx->outputs[0]) { |
| 195 | const AVPixFmtDescriptor *desc = NULL; |
| 196 | formats = NULL; |
| 197 | while ((desc = av_pix_fmt_desc_next(desc))) { |
| 198 | pix_fmt = av_pix_fmt_desc_get_id(desc); |
| 199 | if ((sws_isSupportedOutput(pix_fmt) || pix_fmt == AV_PIX_FMT_PAL8 || |
| 200 | sws_isSupportedEndiannessConversion(pix_fmt)) |
| 201 | && (ret = ff_add_format(&formats, pix_fmt)) < 0) { |
| 202 | ff_formats_unref(&formats); |
| 203 | return ret; |
| 204 | } |
| 205 | } |
| 206 | ff_formats_ref(formats, &ctx->outputs[0]->in_formats); |
| 207 | } |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static const int *parse_yuv_type(const char *s, enum AVColorSpace colorspace) |
| 213 | { |
| 214 | if (!s) |
| 215 | s = "bt601"; |
| 216 | |
| 217 | if (s && strstr(s, "bt709")) { |
| 218 | colorspace = AVCOL_SPC_BT709; |
| 219 | } else if (s && strstr(s, "fcc")) { |
| 220 | colorspace = AVCOL_SPC_FCC; |
| 221 | } else if (s && strstr(s, "smpte240m")) { |
| 222 | colorspace = AVCOL_SPC_SMPTE240M; |
| 223 | } else if (s && (strstr(s, "bt601") || strstr(s, "bt470") || strstr(s, "smpte170m"))) { |
| 224 | colorspace = AVCOL_SPC_BT470BG; |
| 225 | } |
| 226 | |
| 227 | if (colorspace < 1 || colorspace > 7) { |
| 228 | colorspace = AVCOL_SPC_BT470BG; |
| 229 | } |
| 230 | |
| 231 | return sws_getCoefficients(colorspace); |
| 232 | } |
| 233 | |
| 234 | static int config_props(AVFilterLink *outlink) |
| 235 | { |
| 236 | AVFilterContext *ctx = outlink->src; |
| 237 | AVFilterLink *inlink = outlink->src->inputs[0]; |
| 238 | enum AVPixelFormat outfmt = outlink->format; |
| 239 | ScaleContext *scale = ctx->priv; |
| 240 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
| 241 | const AVPixFmtDescriptor *out_desc = av_pix_fmt_desc_get(outlink->format); |
| 242 | int64_t w, h; |
| 243 | double var_values[VARS_NB], res; |
| 244 | char *expr; |
| 245 | int ret; |
| 246 | int factor_w, factor_h; |
| 247 | |
| 248 | var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w; |
| 249 | var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h; |
| 250 | var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN; |
| 251 | var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN; |
| 252 | var_values[VAR_A] = (double) inlink->w / inlink->h; |
| 253 | var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? |
| 254 | (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1; |
| 255 | var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR]; |
| 256 | var_values[VAR_HSUB] = 1 << desc->log2_chroma_w; |
| 257 | var_values[VAR_VSUB] = 1 << desc->log2_chroma_h; |
| 258 | var_values[VAR_OHSUB] = 1 << out_desc->log2_chroma_w; |
| 259 | var_values[VAR_OVSUB] = 1 << out_desc->log2_chroma_h; |
| 260 | |
| 261 | /* evaluate width and height */ |
| 262 | av_expr_parse_and_eval(&res, (expr = scale->w_expr), |
| 263 | var_names, var_values, |
| 264 | NULL, NULL, NULL, NULL, NULL, 0, ctx); |
| 265 | scale->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res; |
| 266 | if ((ret = av_expr_parse_and_eval(&res, (expr = scale->h_expr), |
| 267 | var_names, var_values, |
| 268 | NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) |
| 269 | goto fail; |
| 270 | scale->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res; |
| 271 | /* evaluate again the width, as it may depend on the output height */ |
| 272 | if ((ret = av_expr_parse_and_eval(&res, (expr = scale->w_expr), |
| 273 | var_names, var_values, |
| 274 | NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) |
| 275 | goto fail; |
| 276 | scale->w = res; |
| 277 | |
| 278 | w = scale->w; |
| 279 | h = scale->h; |
| 280 | |
| 281 | /* Check if it is requested that the result has to be divisible by a some |
| 282 | * factor (w or h = -n with n being the factor). */ |
| 283 | factor_w = 1; |
| 284 | factor_h = 1; |
| 285 | if (w < -1) { |
| 286 | factor_w = -w; |
| 287 | } |
| 288 | if (h < -1) { |
| 289 | factor_h = -h; |
| 290 | } |
| 291 | |
| 292 | if (w < 0 && h < 0) |
| 293 | scale->w = scale->h = 0; |
| 294 | |
| 295 | if (!(w = scale->w)) |
| 296 | w = inlink->w; |
| 297 | if (!(h = scale->h)) |
| 298 | h = inlink->h; |
| 299 | |
| 300 | /* Make sure that the result is divisible by the factor we determined |
| 301 | * earlier. If no factor was set, it is nothing will happen as the default |
| 302 | * factor is 1 */ |
| 303 | if (w < 0) |
| 304 | w = av_rescale(h, inlink->w, inlink->h * factor_w) * factor_w; |
| 305 | if (h < 0) |
| 306 | h = av_rescale(w, inlink->h, inlink->w * factor_h) * factor_h; |
| 307 | |
| 308 | /* Note that force_original_aspect_ratio may overwrite the previous set |
| 309 | * dimensions so that it is not divisible by the set factors anymore. */ |
| 310 | if (scale->force_original_aspect_ratio) { |
| 311 | int tmp_w = av_rescale(h, inlink->w, inlink->h); |
| 312 | int tmp_h = av_rescale(w, inlink->h, inlink->w); |
| 313 | |
| 314 | if (scale->force_original_aspect_ratio == 1) { |
| 315 | w = FFMIN(tmp_w, w); |
| 316 | h = FFMIN(tmp_h, h); |
| 317 | } else { |
| 318 | w = FFMAX(tmp_w, w); |
| 319 | h = FFMAX(tmp_h, h); |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | if (w > INT_MAX || h > INT_MAX || |
| 324 | (h * inlink->w) > INT_MAX || |
| 325 | (w * inlink->h) > INT_MAX) |
| 326 | av_log(ctx, AV_LOG_ERROR, "Rescaled value for width or height is too big.\n"); |
| 327 | |
| 328 | outlink->w = w; |
| 329 | outlink->h = h; |
| 330 | |
| 331 | /* TODO: make algorithm configurable */ |
| 332 | |
| 333 | scale->input_is_pal = desc->flags & AV_PIX_FMT_FLAG_PAL || |
| 334 | desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; |
| 335 | if (outfmt == AV_PIX_FMT_PAL8) outfmt = AV_PIX_FMT_BGR8; |
| 336 | scale->output_is_pal = av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PAL || |
| 337 | av_pix_fmt_desc_get(outfmt)->flags & AV_PIX_FMT_FLAG_PSEUDOPAL; |
| 338 | |
| 339 | if (scale->sws) |
| 340 | sws_freeContext(scale->sws); |
| 341 | if (scale->isws[0]) |
| 342 | sws_freeContext(scale->isws[0]); |
| 343 | if (scale->isws[1]) |
| 344 | sws_freeContext(scale->isws[1]); |
| 345 | scale->isws[0] = scale->isws[1] = scale->sws = NULL; |
| 346 | if (inlink->w == outlink->w && inlink->h == outlink->h && |
| 347 | inlink->format == outlink->format) |
| 348 | ; |
| 349 | else { |
| 350 | struct SwsContext **swscs[3] = {&scale->sws, &scale->isws[0], &scale->isws[1]}; |
| 351 | int i; |
| 352 | |
| 353 | for (i = 0; i < 3; i++) { |
| 354 | struct SwsContext **s = swscs[i]; |
| 355 | *s = sws_alloc_context(); |
| 356 | if (!*s) |
| 357 | return AVERROR(ENOMEM); |
| 358 | |
| 359 | if (scale->opts) { |
| 360 | AVDictionaryEntry *e = NULL; |
| 361 | |
| 362 | while ((e = av_dict_get(scale->opts, "", e, AV_DICT_IGNORE_SUFFIX))) { |
| 363 | if ((ret = av_opt_set(*s, e->key, e->value, 0)) < 0) |
| 364 | return ret; |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | av_opt_set_int(*s, "srcw", inlink ->w, 0); |
| 369 | av_opt_set_int(*s, "srch", inlink ->h >> !!i, 0); |
| 370 | av_opt_set_int(*s, "src_format", inlink->format, 0); |
| 371 | av_opt_set_int(*s, "dstw", outlink->w, 0); |
| 372 | av_opt_set_int(*s, "dsth", outlink->h >> !!i, 0); |
| 373 | av_opt_set_int(*s, "dst_format", outfmt, 0); |
| 374 | av_opt_set_int(*s, "sws_flags", scale->flags, 0); |
| 375 | |
| 376 | av_opt_set_int(*s, "src_h_chr_pos", scale->in_h_chr_pos, 0); |
| 377 | av_opt_set_int(*s, "src_v_chr_pos", scale->in_v_chr_pos, 0); |
| 378 | av_opt_set_int(*s, "dst_h_chr_pos", scale->out_h_chr_pos, 0); |
| 379 | av_opt_set_int(*s, "dst_v_chr_pos", scale->out_v_chr_pos, 0); |
| 380 | |
| 381 | if ((ret = sws_init_context(*s, NULL, NULL)) < 0) |
| 382 | return ret; |
| 383 | if (!scale->interlaced) |
| 384 | break; |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | if (inlink->sample_aspect_ratio.num){ |
| 389 | outlink->sample_aspect_ratio = av_mul_q((AVRational){outlink->h * inlink->w, outlink->w * inlink->h}, inlink->sample_aspect_ratio); |
| 390 | } else |
| 391 | outlink->sample_aspect_ratio = inlink->sample_aspect_ratio; |
| 392 | |
| 393 | av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d fmt:%s sar:%d/%d -> w:%d h:%d fmt:%s sar:%d/%d flags:0x%0x\n", |
| 394 | inlink ->w, inlink ->h, av_get_pix_fmt_name( inlink->format), |
| 395 | inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den, |
| 396 | outlink->w, outlink->h, av_get_pix_fmt_name(outlink->format), |
| 397 | outlink->sample_aspect_ratio.num, outlink->sample_aspect_ratio.den, |
| 398 | scale->flags); |
| 399 | return 0; |
| 400 | |
| 401 | fail: |
| 402 | av_log(NULL, AV_LOG_ERROR, |
| 403 | "Error when evaluating the expression '%s'.\n" |
| 404 | "Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n", |
| 405 | expr, scale->w_expr, scale->h_expr); |
| 406 | return ret; |
| 407 | } |
| 408 | |
| 409 | static int scale_slice(AVFilterLink *link, AVFrame *out_buf, AVFrame *cur_pic, struct SwsContext *sws, int y, int h, int mul, int field) |
| 410 | { |
| 411 | ScaleContext *scale = link->dst->priv; |
| 412 | const uint8_t *in[4]; |
| 413 | uint8_t *out[4]; |
| 414 | int in_stride[4],out_stride[4]; |
| 415 | int i; |
| 416 | |
| 417 | for(i=0; i<4; i++){ |
| 418 | int vsub= ((i+1)&2) ? scale->vsub : 0; |
| 419 | in_stride[i] = cur_pic->linesize[i] * mul; |
| 420 | out_stride[i] = out_buf->linesize[i] * mul; |
| 421 | in[i] = cur_pic->data[i] + ((y>>vsub)+field) * cur_pic->linesize[i]; |
| 422 | out[i] = out_buf->data[i] + field * out_buf->linesize[i]; |
| 423 | } |
| 424 | if(scale->input_is_pal) |
| 425 | in[1] = cur_pic->data[1]; |
| 426 | if(scale->output_is_pal) |
| 427 | out[1] = out_buf->data[1]; |
| 428 | |
| 429 | return sws_scale(sws, in, in_stride, y/mul, h, |
| 430 | out,out_stride); |
| 431 | } |
| 432 | |
| 433 | static int filter_frame(AVFilterLink *link, AVFrame *in) |
| 434 | { |
| 435 | ScaleContext *scale = link->dst->priv; |
| 436 | AVFilterLink *outlink = link->dst->outputs[0]; |
| 437 | AVFrame *out; |
| 438 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format); |
| 439 | char buf[32]; |
| 440 | int in_range; |
| 441 | |
| 442 | if( in->width != link->w |
| 443 | || in->height != link->h |
| 444 | || in->format != link->format) { |
| 445 | int ret; |
| 446 | snprintf(buf, sizeof(buf)-1, "%d", outlink->w); |
| 447 | av_opt_set(scale, "w", buf, 0); |
| 448 | snprintf(buf, sizeof(buf)-1, "%d", outlink->h); |
| 449 | av_opt_set(scale, "h", buf, 0); |
| 450 | |
| 451 | link->dst->inputs[0]->format = in->format; |
| 452 | link->dst->inputs[0]->w = in->width; |
| 453 | link->dst->inputs[0]->h = in->height; |
| 454 | |
| 455 | if ((ret = config_props(outlink)) < 0) |
| 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | if (!scale->sws) |
| 460 | return ff_filter_frame(outlink, in); |
| 461 | |
| 462 | scale->hsub = desc->log2_chroma_w; |
| 463 | scale->vsub = desc->log2_chroma_h; |
| 464 | |
| 465 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| 466 | if (!out) { |
| 467 | av_frame_free(&in); |
| 468 | return AVERROR(ENOMEM); |
| 469 | } |
| 470 | |
| 471 | av_frame_copy_props(out, in); |
| 472 | out->width = outlink->w; |
| 473 | out->height = outlink->h; |
| 474 | |
| 475 | if(scale->output_is_pal) |
| 476 | avpriv_set_systematic_pal2((uint32_t*)out->data[1], outlink->format == AV_PIX_FMT_PAL8 ? AV_PIX_FMT_BGR8 : outlink->format); |
| 477 | |
| 478 | in_range = av_frame_get_color_range(in); |
| 479 | |
| 480 | if ( scale->in_color_matrix |
| 481 | || scale->out_color_matrix |
| 482 | || scale-> in_range != AVCOL_RANGE_UNSPECIFIED |
| 483 | || in_range != AVCOL_RANGE_UNSPECIFIED |
| 484 | || scale->out_range != AVCOL_RANGE_UNSPECIFIED) { |
| 485 | int in_full, out_full, brightness, contrast, saturation; |
| 486 | const int *inv_table, *table; |
| 487 | |
| 488 | sws_getColorspaceDetails(scale->sws, (int **)&inv_table, &in_full, |
| 489 | (int **)&table, &out_full, |
| 490 | &brightness, &contrast, &saturation); |
| 491 | |
| 492 | if (scale->in_color_matrix) |
| 493 | inv_table = parse_yuv_type(scale->in_color_matrix, av_frame_get_colorspace(in)); |
| 494 | if (scale->out_color_matrix) |
| 495 | table = parse_yuv_type(scale->out_color_matrix, AVCOL_SPC_UNSPECIFIED); |
| 496 | |
| 497 | if (scale-> in_range != AVCOL_RANGE_UNSPECIFIED) |
| 498 | in_full = (scale-> in_range == AVCOL_RANGE_JPEG); |
| 499 | else if (in_range != AVCOL_RANGE_UNSPECIFIED) |
| 500 | in_full = (in_range == AVCOL_RANGE_JPEG); |
| 501 | if (scale->out_range != AVCOL_RANGE_UNSPECIFIED) |
| 502 | out_full = (scale->out_range == AVCOL_RANGE_JPEG); |
| 503 | |
| 504 | sws_setColorspaceDetails(scale->sws, inv_table, in_full, |
| 505 | table, out_full, |
| 506 | brightness, contrast, saturation); |
| 507 | if (scale->isws[0]) |
| 508 | sws_setColorspaceDetails(scale->isws[0], inv_table, in_full, |
| 509 | table, out_full, |
| 510 | brightness, contrast, saturation); |
| 511 | if (scale->isws[1]) |
| 512 | sws_setColorspaceDetails(scale->isws[1], inv_table, in_full, |
| 513 | table, out_full, |
| 514 | brightness, contrast, saturation); |
| 515 | } |
| 516 | |
| 517 | av_reduce(&out->sample_aspect_ratio.num, &out->sample_aspect_ratio.den, |
| 518 | (int64_t)in->sample_aspect_ratio.num * outlink->h * link->w, |
| 519 | (int64_t)in->sample_aspect_ratio.den * outlink->w * link->h, |
| 520 | INT_MAX); |
| 521 | |
| 522 | if(scale->interlaced>0 || (scale->interlaced<0 && in->interlaced_frame)){ |
| 523 | scale_slice(link, out, in, scale->isws[0], 0, (link->h+1)/2, 2, 0); |
| 524 | scale_slice(link, out, in, scale->isws[1], 0, link->h /2, 2, 1); |
| 525 | }else{ |
| 526 | scale_slice(link, out, in, scale->sws, 0, link->h, 1, 0); |
| 527 | } |
| 528 | |
| 529 | av_frame_free(&in); |
| 530 | return ff_filter_frame(outlink, out); |
| 531 | } |
| 532 | |
| 533 | static const AVClass *child_class_next(const AVClass *prev) |
| 534 | { |
| 535 | return prev ? NULL : sws_get_class(); |
| 536 | } |
| 537 | |
| 538 | #define OFFSET(x) offsetof(ScaleContext, x) |
| 539 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
| 540 | |
| 541 | static const AVOption scale_options[] = { |
| 542 | { "w", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| 543 | { "width", "Output video width", OFFSET(w_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| 544 | { "h", "Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| 545 | { "height","Output video height", OFFSET(h_expr), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| 546 | { "flags", "Flags to pass to libswscale", OFFSET(flags_str), AV_OPT_TYPE_STRING, { .str = "bilinear" }, .flags = FLAGS }, |
| 547 | { "interl", "set interlacing", OFFSET(interlaced), AV_OPT_TYPE_INT, {.i64 = 0 }, -1, 1, FLAGS }, |
| 548 | { "size", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, |
| 549 | { "s", "set video size", OFFSET(size_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, FLAGS }, |
| 550 | { "in_color_matrix", "set input YCbCr type", OFFSET(in_color_matrix), AV_OPT_TYPE_STRING, { .str = "auto" }, .flags = FLAGS }, |
| 551 | { "out_color_matrix", "set output YCbCr type", OFFSET(out_color_matrix), AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS }, |
| 552 | { "in_range", "set input color range", OFFSET( in_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, |
| 553 | { "out_range", "set output color range", OFFSET(out_range), AV_OPT_TYPE_INT, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 2, FLAGS, "range" }, |
| 554 | { "auto", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_UNSPECIFIED }, 0, 0, FLAGS, "range" }, |
| 555 | { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, |
| 556 | { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, |
| 557 | { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, |
| 558 | { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_MPEG}, 0, 0, FLAGS, "range" }, |
| 559 | { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = AVCOL_RANGE_JPEG}, 0, 0, FLAGS, "range" }, |
| 560 | { "in_v_chr_pos", "input vertical chroma position in luma grid/256" , OFFSET(in_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, |
| 561 | { "in_h_chr_pos", "input horizontal chroma position in luma grid/256", OFFSET(in_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, |
| 562 | { "out_v_chr_pos", "output vertical chroma position in luma grid/256" , OFFSET(out_v_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, |
| 563 | { "out_h_chr_pos", "output horizontal chroma position in luma grid/256", OFFSET(out_h_chr_pos), AV_OPT_TYPE_INT, { .i64 = -513}, -513, 512, FLAGS }, |
| 564 | { "force_original_aspect_ratio", "decrease or increase w/h if necessary to keep the original AR", OFFSET(force_original_aspect_ratio), AV_OPT_TYPE_INT, { .i64 = 0}, 0, 2, FLAGS, "force_oar" }, |
| 565 | { "disable", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "force_oar" }, |
| 566 | { "decrease", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "force_oar" }, |
| 567 | { "increase", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 2 }, 0, 0, FLAGS, "force_oar" }, |
| 568 | { NULL } |
| 569 | }; |
| 570 | |
| 571 | static const AVClass scale_class = { |
| 572 | .class_name = "scale", |
| 573 | .item_name = av_default_item_name, |
| 574 | .option = scale_options, |
| 575 | .version = LIBAVUTIL_VERSION_INT, |
| 576 | .category = AV_CLASS_CATEGORY_FILTER, |
| 577 | .child_class_next = child_class_next, |
| 578 | }; |
| 579 | |
| 580 | static const AVFilterPad avfilter_vf_scale_inputs[] = { |
| 581 | { |
| 582 | .name = "default", |
| 583 | .type = AVMEDIA_TYPE_VIDEO, |
| 584 | .filter_frame = filter_frame, |
| 585 | }, |
| 586 | { NULL } |
| 587 | }; |
| 588 | |
| 589 | static const AVFilterPad avfilter_vf_scale_outputs[] = { |
| 590 | { |
| 591 | .name = "default", |
| 592 | .type = AVMEDIA_TYPE_VIDEO, |
| 593 | .config_props = config_props, |
| 594 | }, |
| 595 | { NULL } |
| 596 | }; |
| 597 | |
| 598 | AVFilter ff_vf_scale = { |
| 599 | .name = "scale", |
| 600 | .description = NULL_IF_CONFIG_SMALL("Scale the input video size and/or convert the image format."), |
| 601 | .init_dict = init_dict, |
| 602 | .uninit = uninit, |
| 603 | .query_formats = query_formats, |
| 604 | .priv_size = sizeof(ScaleContext), |
| 605 | .priv_class = &scale_class, |
| 606 | .inputs = avfilter_vf_scale_inputs, |
| 607 | .outputs = avfilter_vf_scale_outputs, |
| 608 | }; |