libavutil/pixdesc.c - third_party/ffmpeg - Git at Google

 /*
  * pixel format descriptor
  * Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */

 #include <stdio.h>
 #include <string.h>
 #include "pixfmt.h"
 #include "pixdesc.h"

 #include "intreadwrite.h"

 void av_read_image_line(uint16_t *dst, const uint8_t *data[4], const int linesize[4],
                         const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component)
 {
     AVComponentDescriptor comp= desc->comp[c];
     int plane= comp.plane;
     int depth= comp.depth_minus1+1;
     int mask = (1<<depth)-1;
     int shift= comp.shift;
     int step = comp.step_minus1+1;
     int flags= desc->flags;

     if (flags & PIX_FMT_BITSTREAM){
         int skip = x*step + comp.offset_plus1-1;
         const uint8_t *p = data[plane] + y*linesize[plane] + (skip>>3);
         int shift = 8 - depth - (skip&7);

         while(w--){
             int val = (*p >> shift) & mask;
             if(read_pal_component)
                 val= data[1][4*val + c];
             shift -= step;
             p -= shift>>3;
             shift &= 7;
             *dst++= val;
         }
     } else {
         const uint8_t *p = data[plane]+ y*linesize[plane] + x*step + comp.offset_plus1-1;
         int is_8bit = shift + depth <= 8;

         if (is_8bit)
             p += !!(flags & PIX_FMT_BE);

         while(w--){
             int val = is_8bit ? *p :
                 flags & PIX_FMT_BE ? AV_RB16(p) : AV_RL16(p);
             val = (val>>shift) & mask;
             if(read_pal_component)
                 val= data[1][4*val + c];
             p+= step;
             *dst++= val;
         }
     }
 }

 void av_write_image_line(const uint16_t *src, uint8_t *data[4], const int linesize[4],
                          const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
 {
     AVComponentDescriptor comp = desc->comp[c];
     int plane = comp.plane;
     int depth = comp.depth_minus1+1;
     int step  = comp.step_minus1+1;
     int flags = desc->flags;

     if (flags & PIX_FMT_BITSTREAM) {
         int skip = x*step + comp.offset_plus1-1;
         uint8_t *p = data[plane] + y*linesize[plane] + (skip>>3);
         int shift = 8 - depth - (skip&7);

         while (w--) {
             *p |= *src++ << shift;
             shift -= step;
             p -= shift>>3;
             shift &= 7;
         }
     } else {
         int shift = comp.shift;
         uint8_t *p = data[plane]+ y*linesize[plane] + x*step + comp.offset_plus1-1;

         if (shift + depth <= 8) {
             p += !!(flags & PIX_FMT_BE);
             while (w--) {
                 *p |= (*src++<<shift);
                 p += step;
             }
         } else {
             while (w--) {
                 if (flags & PIX_FMT_BE) {
                     uint16_t val = AV_RB16(p) | (*src++<<shift);
                     AV_WB16(p, val);
                 } else {
                     uint16_t val = AV_RL16(p) | (*src++<<shift);
                     AV_WL16(p, val);
                 }
                 p+= step;
             }
         }
     }
 }

 const AVPixFmtDescriptor av_pix_fmt_descriptors[PIX_FMT_NB] = {
     [PIX_FMT_YUV420P] = {
         .name = "yuv420p",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUYV422] = {
         .name = "yuyv422",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,7},        /* Y */
             {0,3,2,0,7},        /* U */
             {0,3,4,0,7},        /* V */
         },
     },
     [PIX_FMT_RGB24] = {
         .name = "rgb24",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,2,1,0,7},        /* R */
             {0,2,2,0,7},        /* G */
             {0,2,3,0,7},        /* B */
         },
     },
     [PIX_FMT_BGR24] = {
         .name = "bgr24",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,2,1,0,7},        /* B */
             {0,2,2,0,7},        /* G */
             {0,2,3,0,7},        /* R */
         },
     },
     [PIX_FMT_YUV422P] = {
         .name = "yuv422p",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUV444P] = {
         .name = "yuv444p",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUV410P] = {
         .name = "yuv410p",
         .nb_components= 3,
         .log2_chroma_w= 2,
         .log2_chroma_h= 2,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUV411P] = {
         .name = "yuv411p",
         .nb_components= 3,
         .log2_chroma_w= 2,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_GRAY8] = {
         .name = "gray",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_MONOWHITE] = {
         .name = "monow",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,0},        /* Y */
         },
         .flags = PIX_FMT_BITSTREAM,
     },
     [PIX_FMT_MONOBLACK] = {
         .name = "monob",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,7,0},        /* Y */
         },
         .flags = PIX_FMT_BITSTREAM,
     },
     [PIX_FMT_PAL8] = {
         .name = "pal8",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_YUVJ420P] = {
         .name = "yuvj420p",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUVJ422P] = {
         .name = "yuvj422p",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUVJ444P] = {
         .name = "yuvj444p",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_XVMC_MPEG2_MC] = {
         .name = "xvmcmc",
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_XVMC_MPEG2_IDCT] = {
         .name = "xvmcidct",
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_UYVY422] = {
         .name = "uyvy422",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,0,7},        /* Y */
             {0,3,1,0,7},        /* U */
             {0,3,3,0,7},        /* V */
         },
     },
     [PIX_FMT_UYYVYY411] = {
         .name = "uyyvyy411",
         .nb_components= 3,
         .log2_chroma_w= 2,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,2,0,7},        /* Y */
             {0,5,1,0,7},        /* U */
             {0,5,4,0,7},        /* V */
         },
     },
     [PIX_FMT_BGR8] = {
         .name = "bgr8",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,6,1},        /* B */
             {0,0,1,3,2},        /* G */
             {0,0,1,0,2},        /* R */
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_BGR4] = {
         .name = "bgr4",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,0},        /* B */
             {0,3,2,0,1},        /* G */
             {0,3,4,0,0},        /* R */
         },
         .flags = PIX_FMT_BITSTREAM,
     },
     [PIX_FMT_BGR4_BYTE] = {
         .name = "bgr4_byte",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,3,0},        /* B */
             {0,0,1,1,1},        /* G */
             {0,0,1,0,0},        /* R */
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_RGB8] = {
         .name = "rgb8",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,6,1},        /* R */
             {0,0,1,3,2},        /* G */
             {0,0,1,0,2},        /* B */
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_RGB4] = {
         .name = "rgb4",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,0},       /* R */
             {0,3,2,0,1},       /* G */
             {0,3,4,0,0},       /* B */
         },
         .flags = PIX_FMT_BITSTREAM,
     },
     [PIX_FMT_RGB4_BYTE] = {
         .name = "rgb4_byte",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,0,1,3,0},        /* R */
             {0,0,1,1,1},        /* G */
             {0,0,1,0,0},        /* B */
         },
         .flags = PIX_FMT_PAL,
     },
     [PIX_FMT_NV12] = {
         .name = "nv12",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,1,1,0,7},        /* U */
             {1,1,2,0,7},        /* V */
         },
     },
     [PIX_FMT_NV21] = {
         .name = "nv21",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,1,1,0,7},        /* V */
             {1,1,2,0,7},        /* U */
         },
     },
     [PIX_FMT_ARGB] = {
         .name = "argb",
         .nb_components= 4,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,7},        /* A */
             {0,3,2,0,7},        /* R */
             {0,3,3,0,7},        /* G */
             {0,3,4,0,7},        /* B */
         },
     },
     [PIX_FMT_RGBA] = {
         .name = "rgba",
         .nb_components= 4,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,7},        /* R */
             {0,3,2,0,7},        /* G */
             {0,3,3,0,7},        /* B */
             {0,3,4,0,7},        /* A */
         },
     },
     [PIX_FMT_ABGR] = {
         .name = "abgr",
         .nb_components= 4,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,7},        /* A */
             {0,3,2,0,7},        /* B */
             {0,3,3,0,7},        /* G */
             {0,3,4,0,7},        /* R */
         },
     },
     [PIX_FMT_BGRA] = {
         .name = "bgra",
         .nb_components= 4,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,3,1,0,7},        /* B */
             {0,3,2,0,7},        /* G */
             {0,3,3,0,7},        /* R */
             {0,3,4,0,7},        /* A */
         },
     },
     [PIX_FMT_GRAY16BE] = {
         .name = "gray16be",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},       /* Y */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_GRAY16LE] = {
         .name = "gray16le",
         .nb_components= 1,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},       /* Y */
         },
     },
     [PIX_FMT_YUV440P] = {
         .name = "yuv440p",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUVJ440P] = {
         .name = "yuvj440p",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
         },
     },
     [PIX_FMT_YUVA420P] = {
         .name = "yuva420p",
         .nb_components= 4,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,0,1,0,7},        /* Y */
             {1,0,1,0,7},        /* U */
             {2,0,1,0,7},        /* V */
             {3,0,1,0,7},        /* A */
         },
     },
     [PIX_FMT_VDPAU_H264] = {
         .name = "vdpau_h264",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VDPAU_MPEG1] = {
         .name = "vdpau_mpeg1",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VDPAU_MPEG2] = {
         .name = "vdpau_mpeg2",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VDPAU_WMV3] = {
         .name = "vdpau_wmv3",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VDPAU_VC1] = {
         .name = "vdpau_vc1",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VDPAU_MPEG4] = {
         .name = "vdpau_mpeg4",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_RGB48BE] = {
         .name = "rgb48be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,5,1,0,15},       /* R */
             {0,5,3,0,15},       /* G */
             {0,5,5,0,15},       /* B */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_RGB48LE] = {
         .name = "rgb48le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,5,1,0,15},       /* R */
             {0,5,3,0,15},       /* G */
             {0,5,5,0,15},       /* B */
         },
     },
     [PIX_FMT_RGB565BE] = {
         .name = "rgb565be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,3,4},        /* R */
             {0,1,1,5,5},        /* G */
             {0,1,1,0,4},        /* B */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_RGB565LE] = {
         .name = "rgb565le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,3,4},        /* R */
             {0,1,1,5,5},        /* G */
             {0,1,1,0,4},        /* B */
         },
     },
     [PIX_FMT_RGB555BE] = {
         .name = "rgb555be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,2,4},        /* R */
             {0,1,1,5,4},        /* G */
             {0,1,1,0,4},        /* B */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_RGB555LE] = {
         .name = "rgb555le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,2,4},        /* R */
             {0,1,1,5,4},        /* G */
             {0,1,1,0,4},        /* B */
         },
     },
     [PIX_FMT_RGB444BE] = {
         .name = "rgb444be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,0,3},        /* R */
             {0,1,1,4,3},        /* G */
             {0,1,1,0,3},        /* B */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_RGB444LE] = {
         .name = "rgb444le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,0,3},        /* R */
             {0,1,1,4,3},        /* G */
             {0,1,1,0,3},        /* B */
         },
     },
     [PIX_FMT_BGR48BE] = {
         .name = "bgr48be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,5,1,0,15},       /* B */
             {0,5,3,0,15},       /* G */
             {0,5,5,0,15},       /* R */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_BGR48LE] = {
         .name = "bgr48le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,5,1,0,15},       /* B */
             {0,5,3,0,15},       /* G */
             {0,5,5,0,15},       /* R */
         },
     },
     [PIX_FMT_BGR565BE] = {
         .name = "bgr565be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,3,4},        /* B */
             {0,1,1,5,5},        /* G */
             {0,1,1,0,4},        /* R */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_BGR565LE] = {
         .name = "bgr565le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,3,4},        /* B */
             {0,1,1,5,5},        /* G */
             {0,1,1,0,4},        /* R */
         },
     },
     [PIX_FMT_BGR555BE] = {
         .name = "bgr555be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,2,4},       /* B */
             {0,1,1,5,4},       /* G */
             {0,1,1,0,4},       /* R */
         },
         .flags = PIX_FMT_BE,
      },
     [PIX_FMT_BGR555LE] = {
         .name = "bgr555le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,2,4},        /* B */
             {0,1,1,5,4},        /* G */
             {0,1,1,0,4},        /* R */
         },
     },
     [PIX_FMT_BGR444BE] = {
         .name = "bgr444be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,0,0,3},       /* B */
             {0,1,1,4,3},       /* G */
             {0,1,1,0,3},       /* R */
         },
         .flags = PIX_FMT_BE,
      },
     [PIX_FMT_BGR444LE] = {
         .name = "bgr444le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,2,0,3},        /* B */
             {0,1,1,4,3},        /* G */
             {0,1,1,0,3},        /* R */
         },
     },
     [PIX_FMT_VAAPI_MOCO] = {
         .name = "vaapi_moco",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VAAPI_IDCT] = {
         .name = "vaapi_idct",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_VAAPI_VLD] = {
         .name = "vaapi_vld",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_YUV420P9LE] = {
         .name = "yuv420p9le",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,8},        /* Y */
             {1,1,1,0,8},        /* U */
             {2,1,1,0,8},        /* V */
         },
     },
     [PIX_FMT_YUV420P9BE] = {
         .name = "yuv420p9be",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,8},        /* Y */
             {1,1,1,0,8},        /* U */
             {2,1,1,0,8},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV420P10LE] = {
         .name = "yuv420p10le",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
     },
     [PIX_FMT_YUV420P10BE] = {
         .name = "yuv420p10be",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV420P16LE] = {
         .name = "yuv420p16le",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
     },
     [PIX_FMT_YUV420P16BE] = {
         .name = "yuv420p16be",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 1,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV422P10LE] = {
         .name = "yuv422p10le",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
     },
     [PIX_FMT_YUV422P10BE] = {
         .name = "yuv422p10be",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV422P16LE] = {
         .name = "yuv422p16le",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
     },
     [PIX_FMT_YUV422P16BE] = {
         .name = "yuv422p16be",
         .nb_components= 3,
         .log2_chroma_w= 1,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV444P16LE] = {
         .name = "yuv444p16le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
     },
     [PIX_FMT_YUV444P16BE] = {
         .name = "yuv444p16be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,15},        /* Y */
             {1,1,1,0,15},        /* U */
             {2,1,1,0,15},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV444P10LE] = {
         .name = "yuv444p10le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
     },
     [PIX_FMT_YUV444P10BE] = {
         .name = "yuv444p10be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,9},        /* Y */
             {1,1,1,0,9},        /* U */
             {2,1,1,0,9},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_YUV444P9LE] = {
         .name = "yuv444p9le",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,8},        /* Y */
             {1,1,1,0,8},        /* U */
             {2,1,1,0,8},        /* V */
         },
     },
     [PIX_FMT_YUV444P9BE] = {
         .name = "yuv444p9be",
         .nb_components= 3,
         .log2_chroma_w= 0,
         .log2_chroma_h= 0,
         .comp = {
             {0,1,1,0,8},        /* Y */
             {1,1,1,0,8},        /* U */
             {2,1,1,0,8},        /* V */
         },
         .flags = PIX_FMT_BE,
     },
     [PIX_FMT_DXVA2_VLD] = {
         .name = "dxva2_vld",
         .log2_chroma_w = 1,
         .log2_chroma_h = 1,
         .flags = PIX_FMT_HWACCEL,
     },
     [PIX_FMT_GRAY8A] = {
         .name = "gray8a",
         .nb_components= 2,
         .comp = {
             {0,1,1,0,7},        /* Y */
             {0,1,2,0,7},        /* A */
         },
     },
 };

 static enum PixelFormat get_pix_fmt_internal(const char *name)
 {
     enum PixelFormat pix_fmt;

     for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
         if (av_pix_fmt_descriptors[pix_fmt].name &&
             !strcmp(av_pix_fmt_descriptors[pix_fmt].name, name))
             return pix_fmt;

     return PIX_FMT_NONE;
 }

 const char *av_get_pix_fmt_name(enum PixelFormat pix_fmt)
 {
     return (unsigned)pix_fmt < PIX_FMT_NB ?
         av_pix_fmt_descriptors[pix_fmt].name : NULL;
 }

 #if HAVE_BIGENDIAN
 #   define X_NE(be, le) be
 #else
 #   define X_NE(be, le) le
 #endif

 enum PixelFormat av_get_pix_fmt(const char *name)
 {
     enum PixelFormat pix_fmt;

     if (!strcmp(name, "rgb32"))
         name = X_NE("argb", "bgra");
     else if (!strcmp(name, "bgr32"))
         name = X_NE("abgr", "rgba");

     pix_fmt = get_pix_fmt_internal(name);
     if (pix_fmt == PIX_FMT_NONE) {
         char name2[32];

         snprintf(name2, sizeof(name2), "%s%s", name, X_NE("be", "le"));
         pix_fmt = get_pix_fmt_internal(name2);
     }
     return pix_fmt;
 }

 int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
 {
     int c, bits = 0;
     int log2_pixels = pixdesc->log2_chroma_w + pixdesc->log2_chroma_h;

     for (c = 0; c < pixdesc->nb_components; c++) {
         int s = c==1 || c==2 ? 0 : log2_pixels;
         bits += (pixdesc->comp[c].depth_minus1+1) << s;
     }

     return bits >> log2_pixels;
 }

 char *av_get_pix_fmt_string (char *buf, int buf_size, enum PixelFormat pix_fmt)
 {
     /* print header */
     if (pix_fmt < 0) {
         snprintf (buf, buf_size, "name      " " nb_components" " nb_bits");
     } else {
         const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[pix_fmt];
         snprintf(buf, buf_size, "%-11s %7d %10d",
                  pixdesc->name, pixdesc->nb_components, av_get_bits_per_pixel(pixdesc));
     }

     return buf;
 }
	/*
	* pixel format descriptor
	* Copyright (c) 2009 Michael Niedermayer <michaelni@gmx.at>
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Lesser General Public
	* License as published by the Free Software Foundation; either
	* version 2.1 of the License, or (at your option) any later version.
	*
	* FFmpeg is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Lesser General Public License for more details.
	*
	* You should have received a copy of the GNU Lesser General Public
	* License along with FFmpeg; if not, write to the Free Software
	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	*/

	#include <stdio.h>
	#include <string.h>
	#include "pixfmt.h"
	#include "pixdesc.h"

	#include "intreadwrite.h"

	void av_read_image_line(uint16_t dst, const uint8_t data[4], const int linesize[4],
	const AVPixFmtDescriptor *desc, int x, int y, int c, int w, int read_pal_component)
	{
	AVComponentDescriptor comp= desc->comp[c];
	int plane= comp.plane;
	int depth= comp.depth_minus1+1;
	int mask = (1<<depth)-1;
	int shift= comp.shift;
	int step = comp.step_minus1+1;
	int flags= desc->flags;

	if (flags & PIX_FMT_BITSTREAM){
	int skip = x*step + comp.offset_plus1-1;
	const uint8_t p = data[plane] + ylinesize[plane] + (skip>>3);
	int shift = 8 - depth - (skip&7);

	while(w--){
	int val = (*p >> shift) & mask;
	if(read_pal_component)
	val= data[1][4*val + c];
	shift -= step;
	p -= shift>>3;
	shift &= 7;
	*dst++= val;
	}
	} else {
	const uint8_t p = data[plane]+ ylinesize[plane] + x*step + comp.offset_plus1-1;
	int is_8bit = shift + depth <= 8;

	if (is_8bit)
	p += !!(flags & PIX_FMT_BE);

	while(w--){
	int val = is_8bit ? *p :
	flags & PIX_FMT_BE ? AV_RB16(p) : AV_RL16(p);
	val = (val>>shift) & mask;
	if(read_pal_component)
	val= data[1][4*val + c];
	p+= step;
	*dst++= val;
	}
	}
	}

	void av_write_image_line(const uint16_t src, uint8_t data[4], const int linesize[4],
	const AVPixFmtDescriptor *desc, int x, int y, int c, int w)
	{
	AVComponentDescriptor comp = desc->comp[c];
	int plane = comp.plane;
	int depth = comp.depth_minus1+1;
	int step = comp.step_minus1+1;
	int flags = desc->flags;

	if (flags & PIX_FMT_BITSTREAM) {
	int skip = x*step + comp.offset_plus1-1;
	uint8_t p = data[plane] + ylinesize[plane] + (skip>>3);
	int shift = 8 - depth - (skip&7);

	while (w--) {
	p \|= src++ << shift;
	shift -= step;
	p -= shift>>3;
	shift &= 7;
	}
	} else {
	int shift = comp.shift;
	uint8_t p = data[plane]+ ylinesize[plane] + x*step + comp.offset_plus1-1;

	if (shift + depth <= 8) {
	p += !!(flags & PIX_FMT_BE);
	while (w--) {
	p \|= (src++<<shift);
	p += step;
	}
	} else {
	while (w--) {
	if (flags & PIX_FMT_BE) {
	uint16_t val = AV_RB16(p) \| (*src++<<shift);
	AV_WB16(p, val);
	} else {
	uint16_t val = AV_RL16(p) \| (*src++<<shift);
	AV_WL16(p, val);
	}
	p+= step;
	}
	}
	}
	}

	const AVPixFmtDescriptor av_pix_fmt_descriptors[PIX_FMT_NB] = {
	[PIX_FMT_YUV420P] = {
	.name = "yuv420p",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUYV422] = {
	.name = "yuyv422",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,7}, /* Y */
	{0,3,2,0,7}, /* U */
	{0,3,4,0,7}, /* V */
	},
	},
	[PIX_FMT_RGB24] = {
	.name = "rgb24",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,2,1,0,7}, /* R */
	{0,2,2,0,7}, /* G */
	{0,2,3,0,7}, /* B */
	},
	},
	[PIX_FMT_BGR24] = {
	.name = "bgr24",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,2,1,0,7}, /* B */
	{0,2,2,0,7}, /* G */
	{0,2,3,0,7}, /* R */
	},
	},
	[PIX_FMT_YUV422P] = {
	.name = "yuv422p",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUV444P] = {
	.name = "yuv444p",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUV410P] = {
	.name = "yuv410p",
	.nb_components= 3,
	.log2_chroma_w= 2,
	.log2_chroma_h= 2,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUV411P] = {
	.name = "yuv411p",
	.nb_components= 3,
	.log2_chroma_w= 2,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_GRAY8] = {
	.name = "gray",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_MONOWHITE] = {
	.name = "monow",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,0}, /* Y */
	},
	.flags = PIX_FMT_BITSTREAM,
	},
	[PIX_FMT_MONOBLACK] = {
	.name = "monob",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,7,0}, /* Y */
	},
	.flags = PIX_FMT_BITSTREAM,
	},
	[PIX_FMT_PAL8] = {
	.name = "pal8",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7},
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_YUVJ420P] = {
	.name = "yuvj420p",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUVJ422P] = {
	.name = "yuvj422p",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUVJ444P] = {
	.name = "yuvj444p",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_XVMC_MPEG2_MC] = {
	.name = "xvmcmc",
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_XVMC_MPEG2_IDCT] = {
	.name = "xvmcidct",
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_UYVY422] = {
	.name = "uyvy422",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,0,7}, /* Y */
	{0,3,1,0,7}, /* U */
	{0,3,3,0,7}, /* V */
	},
	},
	[PIX_FMT_UYYVYY411] = {
	.name = "uyyvyy411",
	.nb_components= 3,
	.log2_chroma_w= 2,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,2,0,7}, /* Y */
	{0,5,1,0,7}, /* U */
	{0,5,4,0,7}, /* V */
	},
	},
	[PIX_FMT_BGR8] = {
	.name = "bgr8",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,6,1}, /* B */
	{0,0,1,3,2}, /* G */
	{0,0,1,0,2}, /* R */
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_BGR4] = {
	.name = "bgr4",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,0}, /* B */
	{0,3,2,0,1}, /* G */
	{0,3,4,0,0}, /* R */
	},
	.flags = PIX_FMT_BITSTREAM,
	},
	[PIX_FMT_BGR4_BYTE] = {
	.name = "bgr4_byte",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,3,0}, /* B */
	{0,0,1,1,1}, /* G */
	{0,0,1,0,0}, /* R */
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_RGB8] = {
	.name = "rgb8",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,6,1}, /* R */
	{0,0,1,3,2}, /* G */
	{0,0,1,0,2}, /* B */
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_RGB4] = {
	.name = "rgb4",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,0}, /* R */
	{0,3,2,0,1}, /* G */
	{0,3,4,0,0}, /* B */
	},
	.flags = PIX_FMT_BITSTREAM,
	},
	[PIX_FMT_RGB4_BYTE] = {
	.name = "rgb4_byte",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,0,1,3,0}, /* R */
	{0,0,1,1,1}, /* G */
	{0,0,1,0,0}, /* B */
	},
	.flags = PIX_FMT_PAL,
	},
	[PIX_FMT_NV12] = {
	.name = "nv12",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,1,1,0,7}, /* U */
	{1,1,2,0,7}, /* V */
	},
	},
	[PIX_FMT_NV21] = {
	.name = "nv21",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,1,1,0,7}, /* V */
	{1,1,2,0,7}, /* U */
	},
	},
	[PIX_FMT_ARGB] = {
	.name = "argb",
	.nb_components= 4,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,7}, /* A */
	{0,3,2,0,7}, /* R */
	{0,3,3,0,7}, /* G */
	{0,3,4,0,7}, /* B */
	},
	},
	[PIX_FMT_RGBA] = {
	.name = "rgba",
	.nb_components= 4,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,7}, /* R */
	{0,3,2,0,7}, /* G */
	{0,3,3,0,7}, /* B */
	{0,3,4,0,7}, /* A */
	},
	},
	[PIX_FMT_ABGR] = {
	.name = "abgr",
	.nb_components= 4,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,7}, /* A */
	{0,3,2,0,7}, /* B */
	{0,3,3,0,7}, /* G */
	{0,3,4,0,7}, /* R */
	},
	},
	[PIX_FMT_BGRA] = {
	.name = "bgra",
	.nb_components= 4,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,3,1,0,7}, /* B */
	{0,3,2,0,7}, /* G */
	{0,3,3,0,7}, /* R */
	{0,3,4,0,7}, /* A */
	},
	},
	[PIX_FMT_GRAY16BE] = {
	.name = "gray16be",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_GRAY16LE] = {
	.name = "gray16le",
	.nb_components= 1,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	},
	},
	[PIX_FMT_YUV440P] = {
	.name = "yuv440p",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUVJ440P] = {
	.name = "yuvj440p",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	},
	},
	[PIX_FMT_YUVA420P] = {
	.name = "yuva420p",
	.nb_components= 4,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,0,1,0,7}, /* Y */
	{1,0,1,0,7}, /* U */
	{2,0,1,0,7}, /* V */
	{3,0,1,0,7}, /* A */
	},
	},
	[PIX_FMT_VDPAU_H264] = {
	.name = "vdpau_h264",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VDPAU_MPEG1] = {
	.name = "vdpau_mpeg1",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VDPAU_MPEG2] = {
	.name = "vdpau_mpeg2",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VDPAU_WMV3] = {
	.name = "vdpau_wmv3",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VDPAU_VC1] = {
	.name = "vdpau_vc1",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VDPAU_MPEG4] = {
	.name = "vdpau_mpeg4",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_RGB48BE] = {
	.name = "rgb48be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,5,1,0,15}, /* R */
	{0,5,3,0,15}, /* G */
	{0,5,5,0,15}, /* B */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_RGB48LE] = {
	.name = "rgb48le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,5,1,0,15}, /* R */
	{0,5,3,0,15}, /* G */
	{0,5,5,0,15}, /* B */
	},
	},
	[PIX_FMT_RGB565BE] = {
	.name = "rgb565be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,3,4}, /* R */
	{0,1,1,5,5}, /* G */
	{0,1,1,0,4}, /* B */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_RGB565LE] = {
	.name = "rgb565le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,3,4}, /* R */
	{0,1,1,5,5}, /* G */
	{0,1,1,0,4}, /* B */
	},
	},
	[PIX_FMT_RGB555BE] = {
	.name = "rgb555be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,2,4}, /* R */
	{0,1,1,5,4}, /* G */
	{0,1,1,0,4}, /* B */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_RGB555LE] = {
	.name = "rgb555le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,2,4}, /* R */
	{0,1,1,5,4}, /* G */
	{0,1,1,0,4}, /* B */
	},
	},
	[PIX_FMT_RGB444BE] = {
	.name = "rgb444be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,0,3}, /* R */
	{0,1,1,4,3}, /* G */
	{0,1,1,0,3}, /* B */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_RGB444LE] = {
	.name = "rgb444le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,0,3}, /* R */
	{0,1,1,4,3}, /* G */
	{0,1,1,0,3}, /* B */
	},
	},
	[PIX_FMT_BGR48BE] = {
	.name = "bgr48be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,5,1,0,15}, /* B */
	{0,5,3,0,15}, /* G */
	{0,5,5,0,15}, /* R */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_BGR48LE] = {
	.name = "bgr48le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,5,1,0,15}, /* B */
	{0,5,3,0,15}, /* G */
	{0,5,5,0,15}, /* R */
	},
	},
	[PIX_FMT_BGR565BE] = {
	.name = "bgr565be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,3,4}, /* B */
	{0,1,1,5,5}, /* G */
	{0,1,1,0,4}, /* R */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_BGR565LE] = {
	.name = "bgr565le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,3,4}, /* B */
	{0,1,1,5,5}, /* G */
	{0,1,1,0,4}, /* R */
	},
	},
	[PIX_FMT_BGR555BE] = {
	.name = "bgr555be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,2,4}, /* B */
	{0,1,1,5,4}, /* G */
	{0,1,1,0,4}, /* R */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_BGR555LE] = {
	.name = "bgr555le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,2,4}, /* B */
	{0,1,1,5,4}, /* G */
	{0,1,1,0,4}, /* R */
	},
	},
	[PIX_FMT_BGR444BE] = {
	.name = "bgr444be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,0,0,3}, /* B */
	{0,1,1,4,3}, /* G */
	{0,1,1,0,3}, /* R */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_BGR444LE] = {
	.name = "bgr444le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,2,0,3}, /* B */
	{0,1,1,4,3}, /* G */
	{0,1,1,0,3}, /* R */
	},
	},
	[PIX_FMT_VAAPI_MOCO] = {
	.name = "vaapi_moco",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VAAPI_IDCT] = {
	.name = "vaapi_idct",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_VAAPI_VLD] = {
	.name = "vaapi_vld",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_YUV420P9LE] = {
	.name = "yuv420p9le",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,8}, /* Y */
	{1,1,1,0,8}, /* U */
	{2,1,1,0,8}, /* V */
	},
	},
	[PIX_FMT_YUV420P9BE] = {
	.name = "yuv420p9be",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,8}, /* Y */
	{1,1,1,0,8}, /* U */
	{2,1,1,0,8}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV420P10LE] = {
	.name = "yuv420p10le",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	},
	[PIX_FMT_YUV420P10BE] = {
	.name = "yuv420p10be",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV420P16LE] = {
	.name = "yuv420p16le",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	},
	[PIX_FMT_YUV420P16BE] = {
	.name = "yuv420p16be",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 1,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV422P10LE] = {
	.name = "yuv422p10le",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	},
	[PIX_FMT_YUV422P10BE] = {
	.name = "yuv422p10be",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV422P16LE] = {
	.name = "yuv422p16le",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	},
	[PIX_FMT_YUV422P16BE] = {
	.name = "yuv422p16be",
	.nb_components= 3,
	.log2_chroma_w= 1,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV444P16LE] = {
	.name = "yuv444p16le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	},
	[PIX_FMT_YUV444P16BE] = {
	.name = "yuv444p16be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,15}, /* Y */
	{1,1,1,0,15}, /* U */
	{2,1,1,0,15}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV444P10LE] = {
	.name = "yuv444p10le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	},
	[PIX_FMT_YUV444P10BE] = {
	.name = "yuv444p10be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,9}, /* Y */
	{1,1,1,0,9}, /* U */
	{2,1,1,0,9}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_YUV444P9LE] = {
	.name = "yuv444p9le",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,8}, /* Y */
	{1,1,1,0,8}, /* U */
	{2,1,1,0,8}, /* V */
	},
	},
	[PIX_FMT_YUV444P9BE] = {
	.name = "yuv444p9be",
	.nb_components= 3,
	.log2_chroma_w= 0,
	.log2_chroma_h= 0,
	.comp = {
	{0,1,1,0,8}, /* Y */
	{1,1,1,0,8}, /* U */
	{2,1,1,0,8}, /* V */
	},
	.flags = PIX_FMT_BE,
	},
	[PIX_FMT_DXVA2_VLD] = {
	.name = "dxva2_vld",
	.log2_chroma_w = 1,
	.log2_chroma_h = 1,
	.flags = PIX_FMT_HWACCEL,
	},
	[PIX_FMT_GRAY8A] = {
	.name = "gray8a",
	.nb_components= 2,
	.comp = {
	{0,1,1,0,7}, /* Y */
	{0,1,2,0,7}, /* A */
	},
	},
	};

	static enum PixelFormat get_pix_fmt_internal(const char *name)
	{
	enum PixelFormat pix_fmt;

	for (pix_fmt = 0; pix_fmt < PIX_FMT_NB; pix_fmt++)
	if (av_pix_fmt_descriptors[pix_fmt].name &&
	!strcmp(av_pix_fmt_descriptors[pix_fmt].name, name))
	return pix_fmt;

	return PIX_FMT_NONE;
	}

	const char *av_get_pix_fmt_name(enum PixelFormat pix_fmt)
	{
	return (unsigned)pix_fmt < PIX_FMT_NB ?
	av_pix_fmt_descriptors[pix_fmt].name : NULL;
	}

	#if HAVE_BIGENDIAN
	# define X_NE(be, le) be
	#else
	# define X_NE(be, le) le
	#endif

	enum PixelFormat av_get_pix_fmt(const char *name)
	{
	enum PixelFormat pix_fmt;

	if (!strcmp(name, "rgb32"))
	name = X_NE("argb", "bgra");
	else if (!strcmp(name, "bgr32"))
	name = X_NE("abgr", "rgba");

	pix_fmt = get_pix_fmt_internal(name);
	if (pix_fmt == PIX_FMT_NONE) {
	char name2[32];

	snprintf(name2, sizeof(name2), "%s%s", name, X_NE("be", "le"));
	pix_fmt = get_pix_fmt_internal(name2);
	}
	return pix_fmt;
	}

	int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
	{
	int c, bits = 0;
	int log2_pixels = pixdesc->log2_chroma_w + pixdesc->log2_chroma_h;

	for (c = 0; c < pixdesc->nb_components; c++) {
	int s = c==1 \|\| c==2 ? 0 : log2_pixels;
	bits += (pixdesc->comp[c].depth_minus1+1) << s;
	}

	return bits >> log2_pixels;
	}

	char av_get_pix_fmt_string (char buf, int buf_size, enum PixelFormat pix_fmt)
	{
	/* print header */
	if (pix_fmt < 0) {
	snprintf (buf, buf_size, "name " " nb_components" " nb_bits");
	} else {
	const AVPixFmtDescriptor *pixdesc = &av_pix_fmt_descriptors[pix_fmt];
	snprintf(buf, buf_size, "%-11s %7d %10d",
	pixdesc->name, pixdesc->nb_components, av_get_bits_per_pixel(pixdesc));
	}

	return buf;
	}