vorbis_parser.h 2.2 KB

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  1. /*
  2. * This file is part of FFmpeg.
  3. *
  4. * FFmpeg is free software; you can redistribute it and/or
  5. * modify it under the terms of the GNU Lesser General Public
  6. * License as published by the Free Software Foundation; either
  7. * version 2.1 of the License, or (at your option) any later version.
  8. *
  9. * FFmpeg is distributed in the hope that it will be useful,
  10. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12. * Lesser General Public License for more details.
  13. *
  14. * You should have received a copy of the GNU Lesser General Public
  15. * License along with FFmpeg; if not, write to the Free Software
  16. * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17. */
  18. /**
  19. * @file
  20. * A public API for Vorbis parsing
  21. *
  22. * Determines the duration for each packet.
  23. */
  24. #ifndef AVCODEC_VORBIS_PARSER_H
  25. #define AVCODEC_VORBIS_PARSER_H
  26. #include <stdint.h>
  27. typedef struct AVVorbisParseContext AVVorbisParseContext;
  28. /**
  29. * Allocate and initialize the Vorbis parser using headers in the extradata.
  30. */
  31. AVVorbisParseContext *av_vorbis_parse_init(const uint8_t *extradata,
  32. int extradata_size);
  33. /**
  34. * Free the parser and everything associated with it.
  35. */
  36. void av_vorbis_parse_free(AVVorbisParseContext **s);
  37. #define VORBIS_FLAG_HEADER 0x00000001
  38. #define VORBIS_FLAG_COMMENT 0x00000002
  39. #define VORBIS_FLAG_SETUP 0x00000004
  40. /**
  41. * Get the duration for a Vorbis packet.
  42. *
  43. * If @p flags is @c NULL,
  44. * special frames are considered invalid.
  45. *
  46. * @param s Vorbis parser context
  47. * @param buf buffer containing a Vorbis frame
  48. * @param buf_size size of the buffer
  49. * @param flags flags for special frames
  50. */
  51. int av_vorbis_parse_frame_flags(AVVorbisParseContext *s, const uint8_t *buf,
  52. int buf_size, int *flags);
  53. /**
  54. * Get the duration for a Vorbis packet.
  55. *
  56. * @param s Vorbis parser context
  57. * @param buf buffer containing a Vorbis frame
  58. * @param buf_size size of the buffer
  59. */
  60. int av_vorbis_parse_frame(AVVorbisParseContext *s, const uint8_t *buf,
  61. int buf_size);
  62. void av_vorbis_parse_reset(AVVorbisParseContext *s);
  63. #endif /* AVCODEC_VORBIS_PARSER_H */