libavcodec/imgconvert.c

   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 "dsputil.h"
  35 #include "internal.h"
  36 #include "imgconvert.h"
  37 #include "libavutil/colorspace.h"
  38 #include "libavutil/pixdesc.h"
  39 #include "libavcore/imgutils.h"
  40
  41 #if HAVE_MMX && HAVE_YASM
  42 #include "x86/dsputil_mmx.h"
  43 #endif
  44
  45 #define xglue(x, y) x ## y
  46 #define glue(x, y) xglue(x, y)
  47
  48 #define FF_COLOR_RGB      0 /**< RGB color space */
  49 #define FF_COLOR_GRAY     1 /**< gray color space */
  50 #define FF_COLOR_YUV      2 /**< YUV color space. 16 <= Y <= 235, 16 <= U, V <= 240 */
  51 #define FF_COLOR_YUV_JPEG 3 /**< YUV color space. 0 <= Y <= 255, 0 <= U, V <= 255 */
  52
  53 #define FF_PIXEL_PLANAR   0 /**< each channel has one component in AVPicture */
  54 #define FF_PIXEL_PACKED   1 /**< only one components containing all the channels */
  55 #define FF_PIXEL_PALETTE  2  /**< one components containing indexes for a palette */
  56
  57 #if HAVE_MMX && HAVE_YASM
  58 #define deinterlace_line_inplace ff_deinterlace_line_inplace_mmx
  59 #define deinterlace_line         ff_deinterlace_line_mmx
  60 #else
  61 #define deinterlace_line_inplace deinterlace_line_inplace_c
  62 #define deinterlace_line         deinterlace_line_c
  63 #endif
  64
  65 typedef struct PixFmtInfo {
  66     uint8_t nb_channels;     /**< number of channels (including alpha) */
  67     uint8_t color_type;      /**< color type (see FF_COLOR_xxx constants) */
  68     uint8_t pixel_type;      /**< pixel storage type (see FF_PIXEL_xxx constants) */
  69     uint8_t is_alpha : 1;    /**< true if alpha can be specified */
  70     uint8_t depth;           /**< bit depth of the color components */
  71 } PixFmtInfo;
  72
  73 /* this table gives more information about formats */
  74 static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
  75     /* YUV formats */
  76     [PIX_FMT_YUV420P] = {
  77         .nb_channels = 3,
  78         .color_type = FF_COLOR_YUV,
  79         .pixel_type = FF_PIXEL_PLANAR,
  80         .depth = 8,
  81     },
  82     [PIX_FMT_YUV422P] = {
  83         .nb_channels = 3,
  84         .color_type = FF_COLOR_YUV,
  85         .pixel_type = FF_PIXEL_PLANAR,
  86         .depth = 8,
  87     },
  88     [PIX_FMT_YUV444P] = {
  89         .nb_channels = 3,
  90         .color_type = FF_COLOR_YUV,
  91         .pixel_type = FF_PIXEL_PLANAR,
  92         .depth = 8,
  93     },
  94     [PIX_FMT_YUYV422] = {
  95         .nb_channels = 1,
  96         .color_type = FF_COLOR_YUV,
  97         .pixel_type = FF_PIXEL_PACKED,
  98         .depth = 8,
  99     },
 100     [PIX_FMT_UYVY422] = {
 101         .nb_channels = 1,
 102         .color_type = FF_COLOR_YUV,
 103         .pixel_type = FF_PIXEL_PACKED,
 104         .depth = 8,
 105     },
 106     [PIX_FMT_YUV410P] = {
 107         .nb_channels = 3,
 108         .color_type = FF_COLOR_YUV,
 109         .pixel_type = FF_PIXEL_PLANAR,
 110         .depth = 8,
 111     },
 112     [PIX_FMT_YUV411P] = {
 113         .nb_channels = 3,
 114         .color_type = FF_COLOR_YUV,
 115         .pixel_type = FF_PIXEL_PLANAR,
 116         .depth = 8,
 117     },
 118     [PIX_FMT_YUV440P] = {
 119         .nb_channels = 3,
 120         .color_type = FF_COLOR_YUV,
 121         .pixel_type = FF_PIXEL_PLANAR,
 122         .depth = 8,
 123     },
 124     [PIX_FMT_YUV420P16LE] = {
 125         .nb_channels = 3,
 126         .color_type = FF_COLOR_YUV,
 127         .pixel_type = FF_PIXEL_PLANAR,
 128         .depth = 16,
 129     },
 130     [PIX_FMT_YUV422P16LE] = {
 131         .nb_channels = 3,
 132         .color_type = FF_COLOR_YUV,
 133         .pixel_type = FF_PIXEL_PLANAR,
 134         .depth = 16,
 135     },
 136     [PIX_FMT_YUV444P16LE] = {
 137         .nb_channels = 3,
 138         .color_type = FF_COLOR_YUV,
 139         .pixel_type = FF_PIXEL_PLANAR,
 140         .depth = 16,
 141     },
 142     [PIX_FMT_YUV420P16BE] = {
 143         .nb_channels = 3,
 144         .color_type = FF_COLOR_YUV,
 145         .pixel_type = FF_PIXEL_PLANAR,
 146         .depth = 16,
 147     },
 148     [PIX_FMT_YUV422P16BE] = {
 149         .nb_channels = 3,
 150         .color_type = FF_COLOR_YUV,
 151         .pixel_type = FF_PIXEL_PLANAR,
 152         .depth = 16,
 153     },
 154     [PIX_FMT_YUV444P16BE] = {
 155         .nb_channels = 3,
 156         .color_type = FF_COLOR_YUV,
 157         .pixel_type = FF_PIXEL_PLANAR,
 158         .depth = 16,
 159     },
 160
 161
 162     /* YUV formats with alpha plane */
 163     [PIX_FMT_YUVA420P] = {
 164         .nb_channels = 4,
 165         .color_type = FF_COLOR_YUV,
 166         .pixel_type = FF_PIXEL_PLANAR,
 167         .depth = 8,
 168     },
 169
 170     /* JPEG YUV */
 171     [PIX_FMT_YUVJ420P] = {
 172         .nb_channels = 3,
 173         .color_type = FF_COLOR_YUV_JPEG,
 174         .pixel_type = FF_PIXEL_PLANAR,
 175         .depth = 8,
 176     },
 177     [PIX_FMT_YUVJ422P] = {
 178         .nb_channels = 3,
 179         .color_type = FF_COLOR_YUV_JPEG,
 180         .pixel_type = FF_PIXEL_PLANAR,
 181         .depth = 8,
 182     },
 183     [PIX_FMT_YUVJ444P] = {
 184         .nb_channels = 3,
 185         .color_type = FF_COLOR_YUV_JPEG,
 186         .pixel_type = FF_PIXEL_PLANAR,
 187         .depth = 8,
 188     },
 189     [PIX_FMT_YUVJ440P] = {
 190         .nb_channels = 3,
 191         .color_type = FF_COLOR_YUV_JPEG,
 192         .pixel_type = FF_PIXEL_PLANAR,
 193         .depth = 8,
 194     },
 195
 196     /* RGB formats */
 197     [PIX_FMT_RGB24] = {
 198         .nb_channels = 3,
 199         .color_type = FF_COLOR_RGB,
 200         .pixel_type = FF_PIXEL_PACKED,
 201         .depth = 8,
 202     },
 203     [PIX_FMT_BGR24] = {
 204         .nb_channels = 3,
 205         .color_type = FF_COLOR_RGB,
 206         .pixel_type = FF_PIXEL_PACKED,
 207         .depth = 8,
 208     },
 209     [PIX_FMT_ARGB] = {
 210         .nb_channels = 4, .is_alpha = 1,
 211         .color_type = FF_COLOR_RGB,
 212         .pixel_type = FF_PIXEL_PACKED,
 213         .depth = 8,
 214     },
 215     [PIX_FMT_RGB48BE] = {
 216         .nb_channels = 3,
 217         .color_type = FF_COLOR_RGB,
 218         .pixel_type = FF_PIXEL_PACKED,
 219         .depth = 16,
 220     },
 221     [PIX_FMT_RGB48LE] = {
 222         .nb_channels = 3,
 223         .color_type = FF_COLOR_RGB,
 224         .pixel_type = FF_PIXEL_PACKED,
 225         .depth = 16,
 226     },
 227     [PIX_FMT_RGB565BE] = {
 228         .nb_channels = 3,
 229         .color_type = FF_COLOR_RGB,
 230         .pixel_type = FF_PIXEL_PACKED,
 231         .depth = 5,
 232     },
 233     [PIX_FMT_RGB565LE] = {
 234         .nb_channels = 3,
 235         .color_type = FF_COLOR_RGB,
 236         .pixel_type = FF_PIXEL_PACKED,
 237         .depth = 5,
 238     },
 239     [PIX_FMT_RGB555BE] = {
 240         .nb_channels = 3,
 241         .color_type = FF_COLOR_RGB,
 242         .pixel_type = FF_PIXEL_PACKED,
 243         .depth = 5,
 244     },
 245     [PIX_FMT_RGB555LE] = {
 246         .nb_channels = 3,
 247         .color_type = FF_COLOR_RGB,
 248         .pixel_type = FF_PIXEL_PACKED,
 249         .depth = 5,
 250     },
 251     [PIX_FMT_RGB444BE] = {
 252         .nb_channels = 3,
 253         .color_type = FF_COLOR_RGB,
 254         .pixel_type = FF_PIXEL_PACKED,
 255         .depth = 4,
 256     },
 257     [PIX_FMT_RGB444LE] = {
 258         .nb_channels = 3,
 259         .color_type = FF_COLOR_RGB,
 260         .pixel_type = FF_PIXEL_PACKED,
 261         .depth = 4,
 262     },
 263
 264     /* gray / mono formats */
 265     [PIX_FMT_GRAY16BE] = {
 266         .nb_channels = 1,
 267         .color_type = FF_COLOR_GRAY,
 268         .pixel_type = FF_PIXEL_PLANAR,
 269         .depth = 16,
 270     },
 271     [PIX_FMT_GRAY16LE] = {
 272         .nb_channels = 1,
 273         .color_type = FF_COLOR_GRAY,
 274         .pixel_type = FF_PIXEL_PLANAR,
 275         .depth = 16,
 276     },
 277     [PIX_FMT_GRAY8] = {
 278         .nb_channels = 1,
 279         .color_type = FF_COLOR_GRAY,
 280         .pixel_type = FF_PIXEL_PLANAR,
 281         .depth = 8,
 282     },
 283     [PIX_FMT_MONOWHITE] = {
 284         .nb_channels = 1,
 285         .color_type = FF_COLOR_GRAY,
 286         .pixel_type = FF_PIXEL_PLANAR,
 287         .depth = 1,
 288     },
 289     [PIX_FMT_MONOBLACK] = {
 290         .nb_channels = 1,
 291         .color_type = FF_COLOR_GRAY,
 292         .pixel_type = FF_PIXEL_PLANAR,
 293         .depth = 1,
 294     },
 295
 296     /* paletted formats */
 297     [PIX_FMT_PAL8] = {
 298         .nb_channels = 4, .is_alpha = 1,
 299         .color_type = FF_COLOR_RGB,
 300         .pixel_type = FF_PIXEL_PALETTE,
 301         .depth = 8,
 302     },
 303     [PIX_FMT_UYYVYY411] = {
 304         .nb_channels = 1,
 305         .color_type = FF_COLOR_YUV,
 306         .pixel_type = FF_PIXEL_PACKED,
 307         .depth = 8,
 308     },
 309     [PIX_FMT_ABGR] = {
 310         .nb_channels = 4, .is_alpha = 1,
 311         .color_type = FF_COLOR_RGB,
 312         .pixel_type = FF_PIXEL_PACKED,
 313         .depth = 8,
 314     },
 315     [PIX_FMT_BGR565BE] = {
 316         .nb_channels = 3,
 317         .color_type = FF_COLOR_RGB,
 318         .pixel_type = FF_PIXEL_PACKED,
 319         .depth = 5,
 320     },
 321     [PIX_FMT_BGR565LE] = {
 322         .nb_channels = 3,
 323         .color_type = FF_COLOR_RGB,
 324         .pixel_type = FF_PIXEL_PACKED,
 325         .depth = 5,
 326     },
 327     [PIX_FMT_BGR555BE] = {
 328         .nb_channels = 3,
 329         .color_type = FF_COLOR_RGB,
 330         .pixel_type = FF_PIXEL_PACKED,
 331         .depth = 5,
 332     },
 333     [PIX_FMT_BGR555LE] = {
 334         .nb_channels = 3,
 335         .color_type = FF_COLOR_RGB,
 336         .pixel_type = FF_PIXEL_PACKED,
 337         .depth = 5,
 338     },
 339     [PIX_FMT_BGR444BE] = {
 340         .nb_channels = 3,
 341         .color_type = FF_COLOR_RGB,
 342         .pixel_type = FF_PIXEL_PACKED,
 343         .depth = 4,
 344     },
 345     [PIX_FMT_BGR444LE] = {
 346         .nb_channels = 3,
 347         .color_type = FF_COLOR_RGB,
 348         .pixel_type = FF_PIXEL_PACKED,
 349         .depth = 4,
 350     },
 351     [PIX_FMT_RGB8] = {
 352         .nb_channels = 1,
 353         .color_type = FF_COLOR_RGB,
 354         .pixel_type = FF_PIXEL_PACKED,
 355         .depth = 8,
 356     },
 357     [PIX_FMT_RGB4] = {
 358         .nb_channels = 1,
 359         .color_type = FF_COLOR_RGB,
 360         .pixel_type = FF_PIXEL_PACKED,
 361         .depth = 4,
 362     },
 363     [PIX_FMT_RGB4_BYTE] = {
 364         .nb_channels = 1,
 365         .color_type = FF_COLOR_RGB,
 366         .pixel_type = FF_PIXEL_PACKED,
 367         .depth = 8,
 368     },
 369     [PIX_FMT_BGR8] = {
 370         .nb_channels = 1,
 371         .color_type = FF_COLOR_RGB,
 372         .pixel_type = FF_PIXEL_PACKED,
 373         .depth = 8,
 374     },
 375     [PIX_FMT_BGR4] = {
 376         .nb_channels = 1,
 377         .color_type = FF_COLOR_RGB,
 378         .pixel_type = FF_PIXEL_PACKED,
 379         .depth = 4,
 380     },
 381     [PIX_FMT_BGR4_BYTE] = {
 382         .nb_channels = 1,
 383         .color_type = FF_COLOR_RGB,
 384         .pixel_type = FF_PIXEL_PACKED,
 385         .depth = 8,
 386     },
 387     [PIX_FMT_NV12] = {
 388         .nb_channels = 2,
 389         .color_type = FF_COLOR_YUV,
 390         .pixel_type = FF_PIXEL_PLANAR,
 391         .depth = 8,
 392     },
 393     [PIX_FMT_NV21] = {
 394         .nb_channels = 2,
 395         .color_type = FF_COLOR_YUV,
 396         .pixel_type = FF_PIXEL_PLANAR,
 397         .depth = 8,
 398     },
 399
 400     [PIX_FMT_BGRA] = {
 401         .nb_channels = 4, .is_alpha = 1,
 402         .color_type = FF_COLOR_RGB,
 403         .pixel_type = FF_PIXEL_PACKED,
 404         .depth = 8,
 405     },
 406     [PIX_FMT_RGBA] = {
 407         .nb_channels = 4, .is_alpha = 1,
 408         .color_type = FF_COLOR_RGB,
 409         .pixel_type = FF_PIXEL_PACKED,
 410         .depth = 8,
 411     },
 412 };
 413
 414 void avcodec_get_chroma_sub_sample(enum PixelFormat pix_fmt, int *h_shift, int *v_shift)
 415 {
 416     *h_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
 417     *v_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
 418 }
 419
 420 const char *avcodec_get_pix_fmt_name(enum PixelFormat pix_fmt)
 421 {
 422     if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
 423         return NULL;
 424     else
 425         return av_pix_fmt_descriptors[pix_fmt].name;
 426 }
 427
 428 #if LIBAVCODEC_VERSION_MAJOR < 53
 429 enum PixelFormat avcodec_get_pix_fmt(const char *name)
 430 {
 431     return av_get_pix_fmt(name);
 432 }
 433 #endif
 434
 435 void avcodec_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
 436 {
 437     /* print header */
 438     if (pix_fmt < 0)
 439         snprintf (buf, buf_size,
 440                   "name      " " nb_channels" " depth" " is_alpha"
 441             );
 442     else{
 443         PixFmtInfo info= pix_fmt_info[pix_fmt];
 444
 445         char is_alpha_char= info.is_alpha ? 'y' : 'n';
 446
 447         snprintf (buf, buf_size,
 448                   "%-11s %5d %9d %6c",
 449                   av_pix_fmt_descriptors[pix_fmt].name,
 450                   info.nb_channels,
 451                   info.depth,
 452                   is_alpha_char
 453             );
 454     }
 455 }
 456
 457 int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt)
 458 {
 459     return av_pix_fmt_descriptors[pix_fmt].flags & PIX_FMT_HWACCEL;
 460 }
 461
 462 int ff_set_systematic_pal(uint32_t pal[256], enum PixelFormat pix_fmt){
 463     int i;
 464
 465     for(i=0; i<256; i++){
 466         int r,g,b;
 467
 468         switch(pix_fmt) {
 469         case PIX_FMT_RGB8:
 470             r= (i>>5    )*36;
 471             g= ((i>>2)&7)*36;
 472             b= (i&3     )*85;
 473             break;
 474         case PIX_FMT_BGR8:
 475             b= (i>>6    )*85;
 476             g= ((i>>3)&7)*36;
 477             r= (i&7     )*36;
 478             break;
 479         case PIX_FMT_RGB4_BYTE:
 480             r= (i>>3    )*255;
 481             g= ((i>>1)&3)*85;
 482             b= (i&1     )*255;
 483             break;
 484         case PIX_FMT_BGR4_BYTE:
 485             b= (i>>3    )*255;
 486             g= ((i>>1)&3)*85;
 487             r= (i&1     )*255;
 488             break;
 489         case PIX_FMT_GRAY8:
 490             r=b=g= i;
 491             break;
 492         default:
 493             return -1;
 494         }
 495         pal[i] =  b + (g<<8) + (r<<16);
 496     }
 497
 498     return 0;
 499 }
 500
 501 #if LIBAVCODEC_VERSION_MAJOR < 53
 502 int ff_fill_linesize(AVPicture *picture, enum PixelFormat pix_fmt, int width)
 503 {
 504     return av_fill_image_linesizes(picture->linesize, pix_fmt, width);
 505 }
 506
 507 int ff_fill_pointer(AVPicture *picture, uint8_t *ptr, enum PixelFormat pix_fmt,
 508                     int height)
 509 {
 510     return av_fill_image_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
 511 }
 512 #endif
 513
 514 int avpicture_fill(AVPicture *picture, uint8_t *ptr,
 515                    enum PixelFormat pix_fmt, int width, int height)
 516 {
 517
 518     if(avcodec_check_dimensions(NULL, width, height))
 519         return -1;
 520
 521     if (av_fill_image_linesizes(picture->linesize, pix_fmt, width))
 522         return -1;
 523
 524     return av_fill_image_pointers(picture->data, pix_fmt, height, ptr, picture->linesize);
 525 }
 526
 527 int avpicture_layout(const AVPicture* src, enum PixelFormat pix_fmt, int width, int height,
 528                      unsigned char *dest, int dest_size)
 529 {
 530     const PixFmtInfo* pf = &pix_fmt_info[pix_fmt];
 531     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
 532     int i, j, w, ow, h, oh, data_planes;
 533     const unsigned char* s;
 534     int size = avpicture_get_size(pix_fmt, width, height);
 535
 536     if (size > dest_size || size < 0)
 537         return -1;
 538
 539     if (pf->pixel_type == FF_PIXEL_PACKED || pf->pixel_type == FF_PIXEL_PALETTE) {
 540         if (pix_fmt == PIX_FMT_YUYV422 ||
 541             pix_fmt == PIX_FMT_UYVY422 ||
 542             pix_fmt == PIX_FMT_BGR565BE ||
 543             pix_fmt == PIX_FMT_BGR565LE ||
 544             pix_fmt == PIX_FMT_BGR555BE ||
 545             pix_fmt == PIX_FMT_BGR555LE ||
 546             pix_fmt == PIX_FMT_BGR444BE ||
 547             pix_fmt == PIX_FMT_BGR444LE ||
 548             pix_fmt == PIX_FMT_RGB565BE ||
 549             pix_fmt == PIX_FMT_RGB565LE ||
 550             pix_fmt == PIX_FMT_RGB555BE ||
 551             pix_fmt == PIX_FMT_RGB555LE ||
 552             pix_fmt == PIX_FMT_RGB444BE ||
 553             pix_fmt == PIX_FMT_RGB444LE)
 554             w = width * 2;
 555         else if (pix_fmt == PIX_FMT_UYYVYY411)
 556             w = width + width/2;
 557         else if (pix_fmt == PIX_FMT_PAL8)
 558             w = width;
 559         else
 560             w = width * (pf->depth * pf->nb_channels / 8);
 561
 562         data_planes = 1;
 563         h = height;
 564     } else {
 565         data_planes = pf->nb_channels;
 566         w = (width*pf->depth + 7)/8;
 567         h = height;
 568     }
 569
 570     ow = w;
 571     oh = h;
 572
 573     for (i=0; i<data_planes; i++) {
 574         if (i == 1) {
 575             w = (- ((-width) >> desc->log2_chroma_w) * pf->depth + 7) / 8;
 576             h = -((-height) >> desc->log2_chroma_h);
 577             if (pix_fmt == PIX_FMT_NV12 || pix_fmt == PIX_FMT_NV21)
 578                 w <<= 1;
 579         } else if (i == 3) {
 580             w = ow;
 581             h = oh;
 582         }
 583         s = src->data[i];
 584         for(j=0; j<h; j++) {
 585             memcpy(dest, s, w);
 586             dest += w;
 587             s += src->linesize[i];
 588         }
 589     }
 590
 591     if (pf->pixel_type == FF_PIXEL_PALETTE)
 592         memcpy((unsigned char *)(((size_t)dest + 3) & ~3), src->data[1], 256 * 4);
 593
 594     return size;
 595 }
 596
 597 int avpicture_get_size(enum PixelFormat pix_fmt, int width, int height)
 598 {
 599     AVPicture dummy_pict;
 600     if(avcodec_check_dimensions(NULL, width, height))
 601         return -1;
 602     switch (pix_fmt) {
 603     case PIX_FMT_RGB8:
 604     case PIX_FMT_BGR8:
 605     case PIX_FMT_RGB4_BYTE:
 606     case PIX_FMT_BGR4_BYTE:
 607     case PIX_FMT_GRAY8:
 608         // do not include palette for these pseudo-paletted formats
 609         return width * height;
 610     }
 611     return avpicture_fill(&dummy_pict, NULL, pix_fmt, width, height);
 612 }
 613
 614 int avcodec_get_pix_fmt_loss(enum PixelFormat dst_pix_fmt, enum PixelFormat src_pix_fmt,
 615                              int has_alpha)
 616 {
 617     const PixFmtInfo *pf, *ps;
 618     const AVPixFmtDescriptor *src_desc = &av_pix_fmt_descriptors[src_pix_fmt];
 619     const AVPixFmtDescriptor *dst_desc = &av_pix_fmt_descriptors[dst_pix_fmt];
 620     int loss;
 621
 622     ps = &pix_fmt_info[src_pix_fmt];
 623
 624     /* compute loss */
 625     loss = 0;
 626     pf = &pix_fmt_info[dst_pix_fmt];
 627     if (pf->depth < ps->depth ||
 628         ((dst_pix_fmt == PIX_FMT_RGB555BE || dst_pix_fmt == PIX_FMT_RGB555LE ||
 629           dst_pix_fmt == PIX_FMT_BGR555BE || dst_pix_fmt == PIX_FMT_BGR555LE) &&
 630          (src_pix_fmt == PIX_FMT_RGB565BE || src_pix_fmt == PIX_FMT_RGB565LE ||
 631           src_pix_fmt == PIX_FMT_BGR565BE || src_pix_fmt == PIX_FMT_BGR565LE)))
 632         loss |= FF_LOSS_DEPTH;
 633     if (dst_desc->log2_chroma_w > src_desc->log2_chroma_w ||
 634         dst_desc->log2_chroma_h > src_desc->log2_chroma_h)
 635         loss |= FF_LOSS_RESOLUTION;
 636     switch(pf->color_type) {
 637     case FF_COLOR_RGB:
 638         if (ps->color_type != FF_COLOR_RGB &&
 639             ps->color_type != FF_COLOR_GRAY)
 640             loss |= FF_LOSS_COLORSPACE;
 641         break;
 642     case FF_COLOR_GRAY:
 643         if (ps->color_type != FF_COLOR_GRAY)
 644             loss |= FF_LOSS_COLORSPACE;
 645         break;
 646     case FF_COLOR_YUV:
 647         if (ps->color_type != FF_COLOR_YUV)
 648             loss |= FF_LOSS_COLORSPACE;
 649         break;
 650     case FF_COLOR_YUV_JPEG:
 651         if (ps->color_type != FF_COLOR_YUV_JPEG &&
 652             ps->color_type != FF_COLOR_YUV &&
 653             ps->color_type != FF_COLOR_GRAY)
 654             loss |= FF_LOSS_COLORSPACE;
 655         break;
 656     default:
 657         /* fail safe test */
 658         if (ps->color_type != pf->color_type)
 659             loss |= FF_LOSS_COLORSPACE;
 660         break;
 661     }
 662     if (pf->color_type == FF_COLOR_GRAY &&
 663         ps->color_type != FF_COLOR_GRAY)
 664         loss |= FF_LOSS_CHROMA;
 665     if (!pf->is_alpha && (ps->is_alpha && has_alpha))
 666         loss |= FF_LOSS_ALPHA;
 667     if (pf->pixel_type == FF_PIXEL_PALETTE &&
 668         (ps->pixel_type != FF_PIXEL_PALETTE && ps->color_type != FF_COLOR_GRAY))
 669         loss |= FF_LOSS_COLORQUANT;
 670     return loss;
 671 }
 672
 673 static int avg_bits_per_pixel(enum PixelFormat pix_fmt)
 674 {
 675     int bits;
 676     const PixFmtInfo *pf;
 677     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
 678
 679     pf = &pix_fmt_info[pix_fmt];
 680     switch(pf->pixel_type) {
 681     case FF_PIXEL_PACKED:
 682         switch(pix_fmt) {
 683         case PIX_FMT_YUYV422:
 684         case PIX_FMT_UYVY422:
 685         case PIX_FMT_RGB565BE:
 686         case PIX_FMT_RGB565LE:
 687         case PIX_FMT_RGB555BE:
 688         case PIX_FMT_RGB555LE:
 689         case PIX_FMT_RGB444BE:
 690         case PIX_FMT_RGB444LE:
 691         case PIX_FMT_BGR565BE:
 692         case PIX_FMT_BGR565LE:
 693         case PIX_FMT_BGR555BE:
 694         case PIX_FMT_BGR555LE:
 695         case PIX_FMT_BGR444BE:
 696         case PIX_FMT_BGR444LE:
 697             bits = 16;
 698             break;
 699         case PIX_FMT_UYYVYY411:
 700             bits = 12;
 701             break;
 702         default:
 703             bits = pf->depth * pf->nb_channels;
 704             break;
 705         }
 706         break;
 707     case FF_PIXEL_PLANAR:
 708         if (desc->log2_chroma_w == 0 && desc->log2_chroma_h == 0) {
 709             bits = pf->depth * pf->nb_channels;
 710         } else {
 711             bits = pf->depth + ((2 * pf->depth) >>
 712                                 (desc->log2_chroma_w + desc->log2_chroma_h));
 713         }
 714         break;
 715     case FF_PIXEL_PALETTE:
 716         bits = 8;
 717         break;
 718     default:
 719         bits = -1;
 720         break;
 721     }
 722     return bits;
 723 }
 724
 725 static enum PixelFormat avcodec_find_best_pix_fmt1(int64_t pix_fmt_mask,
 726                                       enum PixelFormat src_pix_fmt,
 727                                       int has_alpha,
 728                                       int loss_mask)
 729 {
 730     int dist, i, loss, min_dist;
 731     enum PixelFormat dst_pix_fmt;
 732
 733     /* find exact color match with smallest size */
 734     dst_pix_fmt = PIX_FMT_NONE;
 735     min_dist = 0x7fffffff;
 736     for(i = 0;i < PIX_FMT_NB; i++) {
 737         if (pix_fmt_mask & (1ULL << i)) {
 738             loss = avcodec_get_pix_fmt_loss(i, src_pix_fmt, has_alpha) & loss_mask;
 739             if (loss == 0) {
 740                 dist = avg_bits_per_pixel(i);
 741                 if (dist < min_dist) {
 742                     min_dist = dist;
 743                     dst_pix_fmt = i;
 744                 }
 745             }
 746         }
 747     }
 748     return dst_pix_fmt;
 749 }
 750
 751 enum PixelFormat avcodec_find_best_pix_fmt(int64_t pix_fmt_mask, enum PixelFormat src_pix_fmt,
 752                               int has_alpha, int *loss_ptr)
 753 {
 754     enum PixelFormat dst_pix_fmt;
 755     int loss_mask, i;
 756     static const int loss_mask_order[] = {
 757         ~0, /* no loss first */
 758         ~FF_LOSS_ALPHA,
 759         ~FF_LOSS_RESOLUTION,
 760         ~(FF_LOSS_COLORSPACE | FF_LOSS_RESOLUTION),
 761         ~FF_LOSS_COLORQUANT,
 762         ~FF_LOSS_DEPTH,
 763         0,
 764     };
 765
 766     /* try with successive loss */
 767     i = 0;
 768     for(;;) {
 769         loss_mask = loss_mask_order[i++];
 770         dst_pix_fmt = avcodec_find_best_pix_fmt1(pix_fmt_mask, src_pix_fmt,
 771                                                  has_alpha, loss_mask);
 772         if (dst_pix_fmt >= 0)
 773             goto found;
 774         if (loss_mask == 0)
 775             break;
 776     }
 777     return PIX_FMT_NONE;
 778  found:
 779     if (loss_ptr)
 780         *loss_ptr = avcodec_get_pix_fmt_loss(dst_pix_fmt, src_pix_fmt, has_alpha);
 781     return dst_pix_fmt;
 782 }
 783
 784 void ff_img_copy_plane(uint8_t *dst, int dst_wrap,
 785                            const uint8_t *src, int src_wrap,
 786                            int width, int height)
 787 {
 788     if((!dst) || (!src))
 789         return;
 790     for(;height > 0; height--) {
 791         memcpy(dst, src, width);
 792         dst += dst_wrap;
 793         src += src_wrap;
 794     }
 795 }
 796
 797 int ff_get_plane_bytewidth(enum PixelFormat pix_fmt, int width, int plane)
 798 {
 799     int bits;
 800     const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
 801     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
 802
 803     pf = &pix_fmt_info[pix_fmt];
 804     switch(pf->pixel_type) {
 805     case FF_PIXEL_PACKED:
 806         switch(pix_fmt) {
 807         case PIX_FMT_YUYV422:
 808         case PIX_FMT_UYVY422:
 809         case PIX_FMT_RGB565BE:
 810         case PIX_FMT_RGB565LE:
 811         case PIX_FMT_RGB555BE:
 812         case PIX_FMT_RGB555LE:
 813         case PIX_FMT_RGB444BE:
 814         case PIX_FMT_RGB444LE:
 815         case PIX_FMT_BGR565BE:
 816         case PIX_FMT_BGR565LE:
 817         case PIX_FMT_BGR555BE:
 818         case PIX_FMT_BGR555LE:
 819         case PIX_FMT_BGR444BE:
 820         case PIX_FMT_BGR444LE:
 821             bits = 16;
 822             break;
 823         case PIX_FMT_UYYVYY411:
 824             bits = 12;
 825             break;
 826         default:
 827             bits = pf->depth * pf->nb_channels;
 828             break;
 829         }
 830         return (width * bits + 7) >> 3;
 831         break;
 832     case FF_PIXEL_PLANAR:
 833             if ((pix_fmt != PIX_FMT_NV12 && pix_fmt != PIX_FMT_NV21) &&
 834                 (plane == 1 || plane == 2))
 835                 width= -((-width)>>desc->log2_chroma_w);
 836
 837             return (width * pf->depth + 7) >> 3;
 838         break;
 839     case FF_PIXEL_PALETTE:
 840         if (plane == 0)
 841             return width;
 842         break;
 843     }
 844
 845     return -1;
 846 }
 847
 848 void av_picture_copy(AVPicture *dst, const AVPicture *src,
 849                      enum PixelFormat pix_fmt, int width, int height)
 850 {
 851     int i;
 852     const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
 853     const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
 854
 855     switch(pf->pixel_type) {
 856     case FF_PIXEL_PACKED:
 857     case FF_PIXEL_PLANAR:
 858         for(i = 0; i < pf->nb_channels; i++) {
 859             int h;
 860             int bwidth = ff_get_plane_bytewidth(pix_fmt, width, i);
 861             h = height;
 862             if (i == 1 || i == 2) {
 863                 h= -((-height)>>desc->log2_chroma_h);
 864             }
 865             ff_img_copy_plane(dst->data[i], dst->linesize[i],
 866                            src->data[i], src->linesize[i],
 867                            bwidth, h);
 868         }
 869         break;
 870     case FF_PIXEL_PALETTE:
 871         ff_img_copy_plane(dst->data[0], dst->linesize[0],
 872                        src->data[0], src->linesize[0],
 873                        width, height);
 874         /* copy the palette */
 875         memcpy(dst->data[1], src->data[1], 4*256);
 876         break;
 877     }
 878 }
 879
 880 /* 2x2 -> 1x1 */
 881 void ff_shrink22(uint8_t *dst, int dst_wrap,
 882                      const uint8_t *src, int src_wrap,
 883                      int width, int height)
 884 {
 885     int w;
 886     const uint8_t *s1, *s2;
 887     uint8_t *d;
 888
 889     for(;height > 0; height--) {
 890         s1 = src;
 891         s2 = s1 + src_wrap;
 892         d = dst;
 893         for(w = width;w >= 4; w-=4) {
 894             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
 895             d[1] = (s1[2] + s1[3] + s2[2] + s2[3] + 2) >> 2;
 896             d[2] = (s1[4] + s1[5] + s2[4] + s2[5] + 2) >> 2;
 897             d[3] = (s1[6] + s1[7] + s2[6] + s2[7] + 2) >> 2;
 898             s1 += 8;
 899             s2 += 8;
 900             d += 4;
 901         }
 902         for(;w > 0; w--) {
 903             d[0] = (s1[0] + s1[1] + s2[0] + s2[1] + 2) >> 2;
 904             s1 += 2;
 905             s2 += 2;
 906             d++;
 907         }
 908         src += 2 * src_wrap;
 909         dst += dst_wrap;
 910     }
 911 }
 912
 913 /* 4x4 -> 1x1 */
 914 void ff_shrink44(uint8_t *dst, int dst_wrap,
 915                      const uint8_t *src, int src_wrap,
 916                      int width, int height)
 917 {
 918     int w;
 919     const uint8_t *s1, *s2, *s3, *s4;
 920     uint8_t *d;
 921
 922     for(;height > 0; height--) {
 923         s1 = src;
 924         s2 = s1 + src_wrap;
 925         s3 = s2 + src_wrap;
 926         s4 = s3 + src_wrap;
 927         d = dst;
 928         for(w = width;w > 0; w--) {
 929             d[0] = (s1[0] + s1[1] + s1[2] + s1[3] +
 930                     s2[0] + s2[1] + s2[2] + s2[3] +
 931                     s3[0] + s3[1] + s3[2] + s3[3] +
 932                     s4[0] + s4[1] + s4[2] + s4[3] + 8) >> 4;
 933             s1 += 4;
 934             s2 += 4;
 935             s3 += 4;
 936             s4 += 4;
 937             d++;
 938         }
 939         src += 4 * src_wrap;
 940         dst += dst_wrap;
 941     }
 942 }
 943
 944 /* 8x8 -> 1x1 */
 945 void ff_shrink88(uint8_t *dst, int dst_wrap,
 946                      const uint8_t *src, int src_wrap,
 947                      int width, int height)
 948 {
 949     int w, i;
 950
 951     for(;height > 0; height--) {
 952         for(w = width;w > 0; w--) {
 953             int tmp=0;
 954             for(i=0; i<8; i++){
 955                 tmp += src[0] + src[1] + src[2] + src[3] + src[4] + src[5] + src[6] + src[7];
 956                 src += src_wrap;
 957             }
 958             *(dst++) = (tmp + 32)>>6;
 959             src += 8 - 8*src_wrap;
 960         }
 961         src += 8*src_wrap - 8*width;
 962         dst += dst_wrap - width;
 963     }
 964 }
 965
 966
 967 int avpicture_alloc(AVPicture *picture,
 968                     enum PixelFormat pix_fmt, int width, int height)
 969 {
 970     int size;
 971     void *ptr;
 972
 973     size = avpicture_fill(picture, NULL, pix_fmt, width, height);
 974     if(size<0)
 975         goto fail;
 976     ptr = av_malloc(size);
 977     if (!ptr)
 978         goto fail;
 979     avpicture_fill(picture, ptr, pix_fmt, width, height);
 980     if(picture->data[1] && !picture->data[2])
 981         ff_set_systematic_pal((uint32_t*)picture->data[1], pix_fmt);
 982
 983     return 0;
 984  fail:
 985     memset(picture, 0, sizeof(AVPicture));
 986     return -1;
 987 }
 988
 989 void avpicture_free(AVPicture *picture)
 990 {
 991     av_free(picture->data[0]);
 992 }
 993
 994 /* return true if yuv planar */
 995 static inline int is_yuv_planar(const PixFmtInfo *ps)
 996 {
 997     return (ps->color_type == FF_COLOR_YUV ||
 998             ps->color_type == FF_COLOR_YUV_JPEG) &&
 999         ps->pixel_type == FF_PIXEL_PLANAR;
1000 }
1001
1002 int av_picture_crop(AVPicture *dst, const AVPicture *src,
1003                     enum PixelFormat pix_fmt, int top_band, int left_band)
1004 {
1005     int y_shift;
1006     int x_shift;
1007
1008     if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
1009         return -1;
1010
1011     y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
1012     x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
1013
1014     dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
1015     dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
1016     dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
1017
1018     dst->linesize[0] = src->linesize[0];
1019     dst->linesize[1] = src->linesize[1];
1020     dst->linesize[2] = src->linesize[2];
1021     return 0;
1022 }
1023
1024 int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width,
1025                    enum PixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright,
1026             int *color)
1027 {
1028     uint8_t *optr;
1029     int y_shift;
1030     int x_shift;
1031     int yheight;
1032     int i, y;
1033
1034     if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB ||
1035         !is_yuv_planar(&pix_fmt_info[pix_fmt])) return -1;
1036
1037     for (i = 0; i < 3; i++) {
1038         x_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_w : 0;
1039         y_shift = i ? av_pix_fmt_descriptors[pix_fmt].log2_chroma_h : 0;
1040
1041         if (padtop || padleft) {
1042             memset(dst->data[i], color[i],
1043                 dst->linesize[i] * (padtop >> y_shift) + (padleft >> x_shift));
1044         }
1045
1046         if (padleft || padright) {
1047             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
1048                 (dst->linesize[i] - (padright >> x_shift));
1049             yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
1050             for (y = 0; y < yheight; y++) {
1051                 memset(optr, color[i], (padleft + padright) >> x_shift);
1052                 optr += dst->linesize[i];
1053             }
1054         }
1055
1056         if (src) { /* first line */
1057             uint8_t *iptr = src->data[i];
1058             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
1059                     (padleft >> x_shift);
1060             memcpy(optr, iptr, (width - padleft - padright) >> x_shift);
1061             iptr += src->linesize[i];
1062             optr = dst->data[i] + dst->linesize[i] * (padtop >> y_shift) +
1063                 (dst->linesize[i] - (padright >> x_shift));
1064             yheight = (height - 1 - (padtop + padbottom)) >> y_shift;
1065             for (y = 0; y < yheight; y++) {
1066                 memset(optr, color[i], (padleft + padright) >> x_shift);
1067                 memcpy(optr + ((padleft + padright) >> x_shift), iptr,
1068                        (width - padleft - padright) >> x_shift);
1069                 iptr += src->linesize[i];
1070                 optr += dst->linesize[i];
1071             }
1072         }
1073
1074         if (padbottom || padright) {
1075             optr = dst->data[i] + dst->linesize[i] *
1076                 ((height - padbottom) >> y_shift) - (padright >> x_shift);
1077             memset(optr, color[i],dst->linesize[i] *
1078                 (padbottom >> y_shift) + (padright >> x_shift));
1079         }
1080     }
1081     return 0;
1082 }
1083
1084 /* NOTE: we scan all the pixels to have an exact information */
1085 static int get_alpha_info_pal8(const AVPicture *src, int width, int height)
1086 {
1087     const unsigned char *p;
1088     int src_wrap, ret, x, y;
1089     unsigned int a;
1090     uint32_t *palette = (uint32_t *)src->data[1];
1091
1092     p = src->data[0];
1093     src_wrap = src->linesize[0] - width;
1094     ret = 0;
1095     for(y=0;y<height;y++) {
1096         for(x=0;x<width;x++) {
1097             a = palette[p[0]] >> 24;
1098             if (a == 0x00) {
1099                 ret |= FF_ALPHA_TRANSP;
1100             } else if (a != 0xff) {
1101                 ret |= FF_ALPHA_SEMI_TRANSP;
1102             }
1103             p++;
1104         }
1105         p += src_wrap;
1106     }
1107     return ret;
1108 }
1109
1110 int img_get_alpha_info(const AVPicture *src,
1111                        enum PixelFormat pix_fmt, int width, int height)
1112 {
1113     const PixFmtInfo *pf = &pix_fmt_info[pix_fmt];
1114     int ret;
1115
1116     /* no alpha can be represented in format */
1117     if (!pf->is_alpha)
1118         return 0;
1119     switch(pix_fmt) {
1120     case PIX_FMT_PAL8:
1121         ret = get_alpha_info_pal8(src, width, height);
1122         break;
1123     default:
1124         /* we do not know, so everything is indicated */
1125         ret = FF_ALPHA_TRANSP | FF_ALPHA_SEMI_TRANSP;
1126         break;
1127     }
1128     return ret;
1129 }
1130
1131 #if !(HAVE_MMX && HAVE_YASM)
1132 /* filter parameters: [-1 4 2 4 -1] // 8 */
1133 static void deinterlace_line_c(uint8_t *dst,
1134                              const uint8_t *lum_m4, const uint8_t *lum_m3,
1135                              const uint8_t *lum_m2, const uint8_t *lum_m1,
1136                              const uint8_t *lum,
1137                              int size)
1138 {
1139     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1140     int sum;
1141
1142     for(;size > 0;size--) {
1143         sum = -lum_m4[0];
1144         sum += lum_m3[0] << 2;
1145         sum += lum_m2[0] << 1;
1146         sum += lum_m1[0] << 2;
1147         sum += -lum[0];
1148         dst[0] = cm[(sum + 4) >> 3];
1149         lum_m4++;
1150         lum_m3++;
1151         lum_m2++;
1152         lum_m1++;
1153         lum++;
1154         dst++;
1155     }
1156 }
1157
1158 static void deinterlace_line_inplace_c(uint8_t *lum_m4, uint8_t *lum_m3,
1159                                        uint8_t *lum_m2, uint8_t *lum_m1,
1160                                        uint8_t *lum, int size)
1161 {
1162     uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
1163     int sum;
1164
1165     for(;size > 0;size--) {
1166         sum = -lum_m4[0];
1167         sum += lum_m3[0] << 2;
1168         sum += lum_m2[0] << 1;
1169         lum_m4[0]=lum_m2[0];
1170         sum += lum_m1[0] << 2;
1171         sum += -lum[0];
1172         lum_m2[0] = cm[(sum + 4) >> 3];
1173         lum_m4++;
1174         lum_m3++;
1175         lum_m2++;
1176         lum_m1++;
1177         lum++;
1178     }
1179 }
1180 #endif
1181
1182 /* deinterlacing : 2 temporal taps, 3 spatial taps linear filter. The
1183    top field is copied as is, but the bottom field is deinterlaced
1184    against the top field. */
1185 static void deinterlace_bottom_field(uint8_t *dst, int dst_wrap,
1186                                     const uint8_t *src1, int src_wrap,
1187                                     int width, int height)
1188 {
1189     const uint8_t *src_m2, *src_m1, *src_0, *src_p1, *src_p2;
1190     int y;
1191
1192     src_m2 = src1;
1193     src_m1 = src1;
1194     src_0=&src_m1[src_wrap];
1195     src_p1=&src_0[src_wrap];
1196     src_p2=&src_p1[src_wrap];
1197     for(y=0;y<(height-2);y+=2) {
1198         memcpy(dst,src_m1,width);
1199         dst += dst_wrap;
1200         deinterlace_line(dst,src_m2,src_m1,src_0,src_p1,src_p2,width);
1201         src_m2 = src_0;
1202         src_m1 = src_p1;
1203         src_0 = src_p2;
1204         src_p1 += 2*src_wrap;
1205         src_p2 += 2*src_wrap;
1206         dst += dst_wrap;
1207     }
1208     memcpy(dst,src_m1,width);
1209     dst += dst_wrap;
1210     /* do last line */
1211     deinterlace_line(dst,src_m2,src_m1,src_0,src_0,src_0,width);
1212 }
1213
1214 static void deinterlace_bottom_field_inplace(uint8_t *src1, int src_wrap,
1215                                              int width, int height)
1216 {
1217     uint8_t *src_m1, *src_0, *src_p1, *src_p2;
1218     int y;
1219     uint8_t *buf;
1220     buf = (uint8_t*)av_malloc(width);
1221
1222     src_m1 = src1;
1223     memcpy(buf,src_m1,width);
1224     src_0=&src_m1[src_wrap];
1225     src_p1=&src_0[src_wrap];
1226     src_p2=&src_p1[src_wrap];
1227     for(y=0;y<(height-2);y+=2) {
1228         deinterlace_line_inplace(buf,src_m1,src_0,src_p1,src_p2,width);
1229         src_m1 = src_p1;
1230         src_0 = src_p2;
1231         src_p1 += 2*src_wrap;
1232         src_p2 += 2*src_wrap;
1233     }
1234     /* do last line */
1235     deinterlace_line_inplace(buf,src_m1,src_0,src_0,src_0,width);
1236     av_free(buf);
1237 }
1238
1239 int avpicture_deinterlace(AVPicture *dst, const AVPicture *src,
1240                           enum PixelFormat pix_fmt, int width, int height)
1241 {
1242     int i;
1243
1244     if (pix_fmt != PIX_FMT_YUV420P &&
1245         pix_fmt != PIX_FMT_YUV422P &&
1246         pix_fmt != PIX_FMT_YUV444P &&
1247         pix_fmt != PIX_FMT_YUV411P &&
1248         pix_fmt != PIX_FMT_GRAY8)
1249         return -1;
1250     if ((width & 3) != 0 || (height & 3) != 0)
1251         return -1;
1252
1253     for(i=0;i<3;i++) {
1254         if (i == 1) {
1255             switch(pix_fmt) {
1256             case PIX_FMT_YUV420P:
1257                 width >>= 1;
1258                 height >>= 1;
1259                 break;
1260             case PIX_FMT_YUV422P:
1261                 width >>= 1;
1262                 break;
1263             case PIX_FMT_YUV411P:
1264                 width >>= 2;
1265                 break;
1266             default:
1267                 break;
1268             }
1269             if (pix_fmt == PIX_FMT_GRAY8) {
1270                 break;
1271             }
1272         }
1273         if (src == dst) {
1274             deinterlace_bottom_field_inplace(dst->data[i], dst->linesize[i],
1275                                  width, height);
1276         } else {
1277             deinterlace_bottom_field(dst->data[i],dst->linesize[i],
1278                                         src->data[i], src->linesize[i],
1279                                         width, height);
1280         }
1281     }
1282     emms_c();
1283     return 0;
1284 }
1285