| 1 | /* |
| 2 | * Misc image conversion routines |
| 3 | * Copyright (c) 2001, 2002, 2003 Fabrice Bellard |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * misc image conversion routines |
| 25 | */ |
| 26 | |
| 27 | /* TODO: |
| 28 | * - write 'ffimg' program to test all the image related stuff |
| 29 | * - move all api to slice based system |
| 30 | * - integrate deinterlacing, postprocessing and scaling in the conversion process |
| 31 | */ |
| 32 | |
| 33 | #include "avcodec.h" |
| 34 | #include "imgconvert.h" |
| 35 | #include "internal.h" |
| 36 | #include "mathops.h" |
| 37 | #include "libavutil/avassert.h" |
| 38 | #include "libavutil/colorspace.h" |
| 39 | #include "libavutil/common.h" |
| 40 | #include "libavutil/pixdesc.h" |
| 41 | #include "libavutil/imgutils.h" |
| 42 | |
| 43 | void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift) |
| 44 | { |
| 45 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
| 46 | av_assert0(desc); |
| 47 | *h_shift = desc->log2_chroma_w; |
| 48 | *v_shift = desc->log2_chroma_h; |
| 49 | } |
| 50 | |
| 51 | int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, |
| 52 | enum AVPixelFormat src_pix_fmt, |
| 53 | int has_alpha) |
| 54 | { |
| 55 | return av_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha); |
| 56 | } |
| 57 | |
| 58 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
| 59 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) |
| 60 | { |
| 61 | return av_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); |
| 62 | } |
| 63 | |
| 64 | #if AV_HAVE_INCOMPATIBLE_LIBAV_ABI |
| 65 | enum AVPixelFormat avcodec_find_best_pix_fmt2(const enum AVPixelFormat *pix_fmt_list, |
| 66 | enum AVPixelFormat src_pix_fmt, |
| 67 | int has_alpha, int *loss_ptr){ |
| 68 | return avcodec_find_best_pix_fmt_of_list(pix_fmt_list, src_pix_fmt, has_alpha, loss_ptr); |
| 69 | } |
| 70 | #else |
| 71 | enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, |
| 72 | enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr) |
| 73 | { |
| 74 | return avcodec_find_best_pix_fmt_of_2(dst_pix_fmt1, dst_pix_fmt2, src_pix_fmt, has_alpha, loss_ptr); |
| 75 | } |
| 76 | #endif |
| 77 | |
| 78 | enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, |
| 79 | enum AVPixelFormat src_pix_fmt, |
| 80 | int has_alpha, int *loss_ptr){ |
| 81 | int i; |
| 82 | |
| 83 | enum AVPixelFormat best = AV_PIX_FMT_NONE; |
| 84 | |
| 85 | for(i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) |
| 86 | best = avcodec_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, loss_ptr); |
| 87 | |
| 88 | return best; |
| 89 | } |
| 90 | |
| 91 | /* 2x2 -> 1x1 */ |
| 92 | void ff_shrink22(uint8_t *dst, int dst_wrap, |
| 93 | const uint8_t *src, int src_wrap, |
| 94 | int width, int height) |
| 95 | { |
| 96 | int w; |
| 97 | const uint8_t *s1, *s2; |
| 98 | uint8_t *d; |
| 99 | |
| 100 | for(;height > 0; height--) { |
| 101 | s1 = src; |
| 102 | s2 = s1 + src_wrap; |
| 103 | d = dst; |
| 104 | for(w = width;w >= 4; w-=4) { |
| 105 | d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; |
| 106 | d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2; |
| 107 | d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2; |
| 108 | d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2; |
| 109 | s1 += 8; |
| 110 | s2 += 8; |
| 111 | d += 4; |
| 112 | } |
| 113 | for(;w > 0; w--) { |
| 114 | d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2; |
| 115 | s1 += 2; |
| 116 | s2 += 2; |
| 117 | d++; |
| 118 | } |
| 119 | src += 2 * src_wrap; |
| 120 | dst += dst_wrap; |
| 121 | } |
| 122 | } |
| 123 | |
| 124 | /* 4x4 -> 1x1 */ |
| 125 | void ff_shrink44(uint8_t *dst, int dst_wrap, |
| 126 | const uint8_t *src, int src_wrap, |
| 127 | int width, int height) |
| 128 | { |
| 129 | int w; |
| 130 | const uint8_t *s1, *s2, *s3, *s4; |
| 131 | uint8_t *d; |
| 132 | |
| 133 | for(;height > 0; height--) { |
| 134 | s1 = src; |
| 135 | s2 = s1 + src_wrap; |
| 136 | s3 = s2 + src_wrap; |
| 137 | s4 = s3 + src_wrap; |
| 138 | d = dst; |
| 139 | for(w = width;w > 0; w--) { |
| 140 | d[0] = (s1[0] + s1[1] + s1[2] + s1[3] + |
| 141 | s2[0] + s2[1] + s2[2] + s2[3] + |
| 142 | s3[0] + s3[1] + s3[2] + s3[3] + |
| 143 | s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4; |
| 144 | s1 += 4; |
| 145 | s2 += 4; |
| 146 | s3 += 4; |
| 147 | s4 += 4; |
| 148 | d++; |
| 149 | } |
| 150 | src += 4 * src_wrap; |
| 151 | dst += dst_wrap; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /* 8x8 -> 1x1 */ |
| 156 | void ff_shrink88(uint8_t *dst, int dst_wrap, |
| 157 | const uint8_t *src, int src_wrap, |
| 158 | int width, int height) |
| 159 | { |
| 160 | int w, i; |
| 161 | |
| 162 | for(;height > 0; height--) { |
| 163 | for(w = width;w > 0; w--) { |
| 164 | int tmp=0; |
| 165 | for(i=0; i<8; i++){ |
| 166 | tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7]; |
| 167 | src += src_wrap; |
| 168 | } |
| 169 | *(dst++) = (tmp + 32)>>6; |
| 170 | src += 8 - 8*src_wrap; |
| 171 | } |
| 172 | src += 8*src_wrap - 8*width; |
| 173 | dst += dst_wrap - width; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | /* return true if yuv planar */ |
| 178 | static inline int is_yuv_planar(const AVPixFmtDescriptor *desc) |
| 179 | { |
| 180 | int i; |
| 181 | int planes[4] = { 0 }; |
| 182 | |
| 183 | if ( desc->flags & AV_PIX_FMT_FLAG_RGB |
| 184 | || !(desc->flags & AV_PIX_FMT_FLAG_PLANAR)) |
| 185 | return 0; |
| 186 | |
| 187 | /* set the used planes */ |
| 188 | for (i = 0; i < desc->nb_components; i++) |
| 189 | planes[desc->comp[i].plane] = 1; |
| 190 | |
| 191 | /* if there is an unused plane, the format is not planar */ |
| 192 | for (i = 0; i < desc->nb_components; i++) |
| 193 | if (!planes[i]) |
| 194 | return 0; |
| 195 | return 1; |
| 196 | } |
| 197 | |
| 198 | int av_picture_crop(AVPicture *dst, const AVPicture *src, |
| 199 | enum AVPixelFormat pix_fmt, int top_band, int left_band) |
| 200 | { |
| 201 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
| 202 | int y_shift; |
| 203 | int x_shift; |
| 204 | |
| 205 | if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB) |
| 206 | return -1; |
| 207 | |
| 208 | y_shift = desc->log2_chroma_h; |
| 209 | x_shift = desc->log2_chroma_w; |
| 210 | |
| 211 | if (is_yuv_planar(desc)) { |
| 212 | dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; |
| 213 | dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift); |
| 214 | dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift); |
| 215 | } else{ |
| 216 | if(top_band % (1<<y_shift) || left_band % (1<<x_shift)) |
| 217 | return -1; |
| 218 | if(left_band) //FIXME add support for this too |
| 219 | return -1; |
| 220 | dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band; |
| 221 | } |
| 222 | |
| 223 | dst->linesize[0] = src->linesize[0]; |
| 224 | dst->linesize[1] = src->linesize[1]; |
| 225 | dst->linesize[2] = src->linesize[2]; |
| 226 | return 0; |
| 227 | } |
| 228 | |
| 229 | int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, |
| 230 | enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, |
| 231 | int *color) |
| 232 | { |
| 233 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pix_fmt); |
| 234 | uint8_t *optr; |
| 235 | int y_shift; |
| 236 | int x_shift; |
| 237 | int yheight; |
| 238 | int i, y; |
| 239 | |
| 240 | if (pix_fmt < 0 || pix_fmt >= AV_PIX_FMT_NB || |
| 241 | !is_yuv_planar(desc)) return -1; |
| 242 | |
| 243 | for (i = 0; i < 3; i++) { |
| 244 | x_shift = i ? desc->log2_chroma_w : 0; |
| 245 | y_shift = i ? desc->log2_chroma_h : 0; |
| 246 | |
| 247 | if (padtop || padleft) { |
| 248 | memset(dst->data[i], color[i], |
| 249 | dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift)); |
| 250 | } |
| 251 | |
| 252 | if (padleft || padright) { |
| 253 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
| 254 | (dst->linesize[i] - (padright >> x_shift)); |
| 255 | yheight = (height - 1 - (padtop + padbottom)) >> y_shift; |
| 256 | for (y = 0; y < yheight; y++) { |
| 257 | memset(optr, color[i], (padleft + padright) >> x_shift); |
| 258 | optr += dst->linesize[i]; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | if (src) { /* first line */ |
| 263 | uint8_t *iptr = src->data[i]; |
| 264 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
| 265 | (padleft >> x_shift); |
| 266 | memcpy(optr, iptr, (width - padleft - padright) >> x_shift); |
| 267 | iptr += src->linesize[i]; |
| 268 | optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) + |
| 269 | (dst->linesize[i] - (padright >> x_shift)); |
| 270 | yheight = (height - 1 - (padtop + padbottom)) >> y_shift; |
| 271 | for (y = 0; y < yheight; y++) { |
| 272 | memset(optr, color[i], (padleft + padright) >> x_shift); |
| 273 | memcpy(optr + ((padleft + padright) >> x_shift), iptr, |
| 274 | (width - padleft - padright) >> x_shift); |
| 275 | iptr += src->linesize[i]; |
| 276 | optr += dst->linesize[i]; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | if (padbottom || padright) { |
| 281 | optr = dst->data[i] + dst->linesize[i] * |
| 282 | ((height - padbottom) >> y_shift) - (padright >> x_shift); |
| 283 | memset(optr, color[i],dst->linesize[i] * |
| 284 | (padbottom >> y_shift) + (padright >> x_shift)); |
| 285 | } |
| 286 | } |
| 287 | return 0; |
| 288 | } |
| 289 | |
| 290 | #if FF_API_DEINTERLACE |
| 291 | |
| 292 | #if HAVE_MMX_EXTERNAL |
| 293 | #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx |
| 294 | #define deinterlace_line ff_deinterlace_line_mmx |
| 295 | #else |
| 296 | #define deinterlace_line_inplace deinterlace_line_inplace_c |
| 297 | #define deinterlace_line deinterlace_line_c |
| 298 | |
| 299 | /* filter parameters: [-1 4 2 4 -1] // 8 */ |
| 300 | static void deinterlace_line_c(uint8_t *dst, |
| 301 | const uint8_t *lum_m4, const uint8_t *lum_m3, |
| 302 | const uint8_t *lum_m2, const uint8_t *lum_m1, |
| 303 | const uint8_t *lum, |
| 304 | int size) |
| 305 | { |
| 306 | const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; |
| 307 | int sum; |
| 308 | |
| 309 | for(;size > 0;size--) { |
| 310 | sum = -lum_m4[0]; |
| 311 | sum += lum_m3[0] << 2; |
| 312 | sum += lum_m2[0] << 1; |
| 313 | sum += lum_m1[0] << 2; |
| 314 | sum += -lum[0]; |
| 315 | dst[0] = cm[(sum + 4) >> 3]; |
| 316 | lum_m4++; |
| 317 | lum_m3++; |
| 318 | lum_m2++; |
| 319 | lum_m1++; |
| 320 | lum++; |
| 321 | dst++; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3, |
| 326 | uint8_t *lum_m2, uint8_t *lum_m1, |
| 327 | uint8_t *lum, int size) |
| 328 | { |
| 329 | const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; |
| 330 | int sum; |
| 331 | |
| 332 | for(;size > 0;size--) { |
| 333 | sum = -lum_m4[0]; |
| 334 | sum += lum_m3[0] << 2; |
| 335 | sum += lum_m2[0] << 1; |
| 336 | lum_m4[0]=lum_m2[0]; |
| 337 | sum += lum_m1[0] << 2; |
| 338 | sum += -lum[0]; |
| 339 | lum_m2[0] = cm[(sum + 4) >> 3]; |
| 340 | lum_m4++; |
| 341 | lum_m3++; |
| 342 | lum_m2++; |
| 343 | lum_m1++; |
| 344 | lum++; |
| 345 | } |
| 346 | } |
| 347 | #endif /* !HAVE_MMX_EXTERNAL */ |
| 348 | |
| 349 | /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The |
| 350 | top field is copied as is, but the bottom field is deinterlaced |
| 351 | against the top field. */ |
| 352 | static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap, |
| 353 | const uint8_t *src1, int src_wrap, |
| 354 | int width, int height) |
| 355 | { |
| 356 | const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2; |
| 357 | int y; |
| 358 | |
| 359 | src_m2 = src1; |
| 360 | src_m1 = src1; |
| 361 | src_0=&src_m1[src_wrap]; |
| 362 | src_p1=&src_0[src_wrap]; |
| 363 | src_p2=&src_p1[src_wrap]; |
| 364 | for(y=0;y<(height-2);y+=2) { |
| 365 | memcpy(dst,src_m1,width); |
| 366 | dst += dst_wrap; |
| 367 | deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width); |
| 368 | src_m2 = src_0; |
| 369 | src_m1 = src_p1; |
| 370 | src_0 = src_p2; |
| 371 | src_p1 += 2*src_wrap; |
| 372 | src_p2 += 2*src_wrap; |
| 373 | dst += dst_wrap; |
| 374 | } |
| 375 | memcpy(dst,src_m1,width); |
| 376 | dst += dst_wrap; |
| 377 | /* do last line */ |
| 378 | deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width); |
| 379 | } |
| 380 | |
| 381 | static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap, |
| 382 | int width, int height) |
| 383 | { |
| 384 | uint8_t *src_m1, *src_0, *src_p1, *src_p2; |
| 385 | int y; |
| 386 | uint8_t *buf; |
| 387 | buf = av_malloc(width); |
| 388 | |
| 389 | src_m1 = src1; |
| 390 | memcpy(buf,src_m1,width); |
| 391 | src_0=&src_m1[src_wrap]; |
| 392 | src_p1=&src_0[src_wrap]; |
| 393 | src_p2=&src_p1[src_wrap]; |
| 394 | for(y=0;y<(height-2);y+=2) { |
| 395 | deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width); |
| 396 | src_m1 = src_p1; |
| 397 | src_0 = src_p2; |
| 398 | src_p1 += 2*src_wrap; |
| 399 | src_p2 += 2*src_wrap; |
| 400 | } |
| 401 | /* do last line */ |
| 402 | deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width); |
| 403 | av_free(buf); |
| 404 | } |
| 405 | |
| 406 | int avpicture_deinterlace(AVPicture *dst, const AVPicture *src, |
| 407 | enum AVPixelFormat pix_fmt, int width, int height) |
| 408 | { |
| 409 | int i; |
| 410 | |
| 411 | if (pix_fmt != AV_PIX_FMT_YUV420P && |
| 412 | pix_fmt != AV_PIX_FMT_YUVJ420P && |
| 413 | pix_fmt != AV_PIX_FMT_YUV422P && |
| 414 | pix_fmt != AV_PIX_FMT_YUVJ422P && |
| 415 | pix_fmt != AV_PIX_FMT_YUV444P && |
| 416 | pix_fmt != AV_PIX_FMT_YUV411P && |
| 417 | pix_fmt != AV_PIX_FMT_GRAY8) |
| 418 | return -1; |
| 419 | if ((width & 3) != 0 || (height & 3) != 0) |
| 420 | return -1; |
| 421 | |
| 422 | for(i=0;i<3;i++) { |
| 423 | if (i == 1) { |
| 424 | switch(pix_fmt) { |
| 425 | case AV_PIX_FMT_YUVJ420P: |
| 426 | case AV_PIX_FMT_YUV420P: |
| 427 | width >>= 1; |
| 428 | height >>= 1; |
| 429 | break; |
| 430 | case AV_PIX_FMT_YUV422P: |
| 431 | case AV_PIX_FMT_YUVJ422P: |
| 432 | width >>= 1; |
| 433 | break; |
| 434 | case AV_PIX_FMT_YUV411P: |
| 435 | width >>= 2; |
| 436 | break; |
| 437 | default: |
| 438 | break; |
| 439 | } |
| 440 | if (pix_fmt == AV_PIX_FMT_GRAY8) { |
| 441 | break; |
| 442 | } |
| 443 | } |
| 444 | if (src == dst) { |
| 445 | deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i], |
| 446 | width, height); |
| 447 | } else { |
| 448 | deinterlace_bottom_field(dst->data[i],dst->linesize[i], |
| 449 | src->data[i], src->linesize[i], |
| 450 | width, height); |
| 451 | } |
| 452 | } |
| 453 | emms_c(); |
| 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | #endif /* FF_API_DEINTERLACE */ |
| 458 | |
| 459 | #ifdef TEST |
| 460 | |
| 461 | int main(void){ |
| 462 | int i; |
| 463 | int err=0; |
| 464 | int skip = 0; |
| 465 | |
| 466 | for (i=0; i<AV_PIX_FMT_NB*2; i++) { |
| 467 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i); |
| 468 | if(!desc || !desc->name) { |
| 469 | skip ++; |
| 470 | continue; |
| 471 | } |
| 472 | if (skip) { |
| 473 | av_log(NULL, AV_LOG_INFO, "%3d unused pixel format values\n", skip); |
| 474 | skip = 0; |
| 475 | } |
| 476 | av_log(NULL, AV_LOG_INFO, "pix fmt %s yuv_plan:%d avg_bpp:%d\n", desc->name, is_yuv_planar(desc), av_get_padded_bits_per_pixel(desc)); |
| 477 | if ((!(desc->flags & AV_PIX_FMT_FLAG_ALPHA)) != (desc->nb_components != 2 && desc->nb_components != 4)) { |
| 478 | av_log(NULL, AV_LOG_ERROR, "Alpha flag mismatch\n"); |
| 479 | err = 1; |
| 480 | } |
| 481 | } |
| 482 | return err; |
| 483 | } |
| 484 | |
| 485 | #endif |