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  1. /*
  2. * SSA/ASS common functions
  3. * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
  4. *
  5. * This file is part of Libav.
  6. *
  7. * Libav 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. * Libav 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 Libav; if not, write to the Free Software
  19. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20. */
  21. #ifndef AVCODEC_ASS_H
  22. #define AVCODEC_ASS_H
  23. #include "avcodec.h"
  24. /**
  25. * @name Default values for ASS style
  26. * @{
  27. */
  28. #define ASS_DEFAULT_FONT "Arial"
  29. #define ASS_DEFAULT_FONT_SIZE 16
  30. #define ASS_DEFAULT_COLOR 0xffffff
  31. #define ASS_DEFAULT_BACK_COLOR 0
  32. #define ASS_DEFAULT_BOLD 0
  33. #define ASS_DEFAULT_ITALIC 0
  34. #define ASS_DEFAULT_UNDERLINE 0
  35. #define ASS_DEFAULT_ALIGNMENT 2
  36. /** @} */
  37. /**
  38. * Generate a suitable AVCodecContext.subtitle_header for SUBTITLE_ASS
  39. * with default style.
  40. *
  41. * @param avctx pointer to the AVCodecContext
  42. * @return >= 0 on success otherwise an error code <0
  43. */
  44. int ff_ass_subtitle_header_default(AVCodecContext *avctx);
  45. /**
  46. * Initialize an AVSubtitle structure for use with ff_ass_add_rect().
  47. *
  48. * @param sub pointer to the AVSubtitle
  49. */
  50. void ff_ass_init(AVSubtitle *sub);
  51. /**
  52. * Add an ASS dialog line to an AVSubtitle as a new AVSubtitleRect.
  53. *
  54. * @param sub pointer to the AVSubtitle
  55. * @param dialog ASS dialog to add to sub
  56. * @param ts_start start timestamp for this dialog (in 1/100 second unit)
  57. * @param ts_end end timestamp for this dialog (in 1/100 second unit)
  58. * @param raw when set to 1, it indicates that dialog contains a whole ASS
  59. * dialog line which should be copied as is.
  60. * when set to 0, it indicates that dialog contains only the Text
  61. * part of the ASS dialog line, the rest of the line
  62. * will be generated.
  63. * @return number of characters read from dialog. It can be less than the whole
  64. * length of dialog, if dialog contains several lines of text.
  65. * A negative value indicates an error.
  66. */
  67. int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
  68. int ts_start, int ts_end, int raw);
  69. #endif /* AVCODEC_ASS_H */