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  1. /*
  2.  * GIF format definitions
  3.  * Copyright (c) 2003 Fabrice Bellard
  4.  * Copyright (c) 2006 Baptiste Coudurier
  5.  * Copyright (c) 2012 Vitaliy E Sugrobov
  6.  *
  7.  * This file is part of FFmpeg.
  8.  *
  9.  * FFmpeg is free software; you can redistribute it and/or
  10.  * modify it under the terms of the GNU Lesser General Public
  11.  * License as published by the Free Software Foundation; either
  12.  * version 2.1 of the License, or (at your option) any later version.
  13.  *
  14.  * FFmpeg is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17.  * Lesser General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU Lesser General Public
  20.  * License along with FFmpeg; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22.  */
  23.  
  24. /**
  25.  * @file
  26.  * GIF format definitions.
  27.  */
  28.  
  29. #ifndef AVCODEC_GIFDEFS_H
  30. #define AVCODEC_GIFDEFS_H
  31.  
  32. #include <stdint.h>
  33.  
  34. static const uint8_t gif87a_sig[6] = "GIF87a";
  35. static const uint8_t gif89a_sig[6] = "GIF89a";
  36.  
  37. #define GCE_DISPOSAL_NONE       0
  38. #define GCE_DISPOSAL_INPLACE    1
  39. #define GCE_DISPOSAL_BACKGROUND 2
  40. #define GCE_DISPOSAL_RESTORE    3
  41.  
  42. #define GIF_TRAILER                 0x3b
  43. #define GIF_EXTENSION_INTRODUCER    0x21
  44. #define GIF_IMAGE_SEPARATOR         0x2c
  45. #define GIF_GCE_EXT_LABEL           0xf9
  46. #define GIF_APP_EXT_LABEL           0xff
  47. #define NETSCAPE_EXT_STR            "NETSCAPE2.0"
  48.  
  49. #endif /* AVCODEC_GIFDEFS_H */
  50.