libavcodec/raw.c

   1 /*
   2  * Raw Video Codec
   3  * Copyright (c) 2001 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  * Raw Video Codec
  25  */
  26
  27 #include "avcodec.h"
  28 #include "raw.h"
  29 #include "raw_pix_fmt_tags.h"
  30
  31 unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat fmt)
  32 {
  33     const PixelFormatTag *tags = raw_pix_fmt_tags;
  34     while (tags->pix_fmt >= 0) {
  35         if (tags->pix_fmt == fmt)
  36             return tags->fourcc;
  37         tags++;
  38     }
  39     return 0;
  40 }
  41
  42 static const PixelFormatTag pix_fmt_bps_avi[] = {
  43     { AV_PIX_FMT_PAL8,    1 },
  44     { AV_PIX_FMT_PAL8,    2 },
  45     { AV_PIX_FMT_PAL8,    4 },
  46     { AV_PIX_FMT_PAL8,    8 },
  47     { AV_PIX_FMT_RGB444LE, 12 },
  48     { AV_PIX_FMT_RGB555LE, 15 },
  49     { AV_PIX_FMT_RGB555LE, 16 },
  50     { AV_PIX_FMT_BGR24,  24 },
  51     { AV_PIX_FMT_BGRA,   32 },
  52     { AV_PIX_FMT_NONE,    0 },
  53 };
  54
  55 static const PixelFormatTag pix_fmt_bps_mov[] = {
  56     { AV_PIX_FMT_PAL8,      1 },
  57     { AV_PIX_FMT_PAL8,      2 },
  58     { AV_PIX_FMT_PAL8,      4 },
  59     { AV_PIX_FMT_PAL8,      8 },
  60     { AV_PIX_FMT_RGB555BE, 16 },
  61     { AV_PIX_FMT_RGB24,    24 },
  62     { AV_PIX_FMT_ARGB,     32 },
  63     { AV_PIX_FMT_PAL8,     33 },
  64     { AV_PIX_FMT_NONE,      0 },
  65 };
  66
  67 static enum AVPixelFormat find_pix_fmt(const PixelFormatTag *tags,
  68                                        unsigned int fourcc)
  69 {
  70     while (tags->pix_fmt != AV_PIX_FMT_NONE) {
  71         if (tags->fourcc == fourcc)
  72             return tags->pix_fmt;
  73         tags++;
  74     }
  75     return AV_PIX_FMT_NONE;
  76 }
  77
  78 enum AVPixelFormat avpriv_pix_fmt_find(enum PixelFormatTagLists list,
  79                                        unsigned fourcc)
  80 {
  81     const PixelFormatTag *tags;
  82
  83     switch (list) {
  84     case PIX_FMT_LIST_RAW:
  85         tags = raw_pix_fmt_tags;
  86         break;
  87     case PIX_FMT_LIST_AVI:
  88         tags = pix_fmt_bps_avi;
  89         break;
  90     case PIX_FMT_LIST_MOV:
  91         tags = pix_fmt_bps_mov;
  92         break;
  93     }
  94     return find_pix_fmt(tags, fourcc);
  95 }