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  1. /*
  2. * a52.h
  3. * Copyright (C) 2000-2003 Michel Lespinasse <walken@zoy.org>
  4. * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
  5. *
  6. * This file is part of a52dec, a free ATSC A-52 stream decoder.
  7. * See http://liba52.sourceforge.net/ for updates.
  8. *
  9. * a52dec is free software; you can redistribute it and/or modify
  10. * it under the terms of the GNU General Public License as published by
  11. * the Free Software Foundation; either version 2 of the License, or
  12. * (at your option) any later version.
  13. *
  14. * a52dec 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
  17. * GNU General Public License for more details.
  18. *
  19. * You should have received a copy of the GNU General Public License
  20. * along with this program; if not, write to the Free Software
  21. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22. */
  23. #ifndef A52_H
  24. #define A52_H
  25. #include "../avcodec.h"
  26. #undef malloc
  27. #undef free
  28. #undef realloc
  29. #if defined(LIBA52_FIXED)
  30. typedef int32_t sample_t;
  31. typedef int32_t level_t;
  32. #elif defined(LIBA52_DOUBLE)
  33. typedef double sample_t;
  34. typedef double level_t;
  35. #else
  36. typedef float sample_t;
  37. typedef float level_t;
  38. #endif
  39. typedef struct a52_state_s a52_state_t;
  40. #define A52_CHANNEL 0
  41. #define A52_MONO 1
  42. #define A52_STEREO 2
  43. #define A52_3F 3
  44. #define A52_2F1R 4
  45. #define A52_3F1R 5
  46. #define A52_2F2R 6
  47. #define A52_3F2R 7
  48. #define A52_CHANNEL1 8
  49. #define A52_CHANNEL2 9
  50. #define A52_DOLBY 10
  51. #define A52_CHANNEL_MASK 15
  52. #define A52_LFE 16
  53. #define A52_ADJUST_LEVEL 32
  54. a52_state_t * a52_init (uint32_t mm_accel);
  55. sample_t * a52_samples (a52_state_t * state);
  56. int a52_syncinfo (uint8_t * buf, int * flags,
  57. int * sample_rate, int * bit_rate);
  58. int a52_frame (a52_state_t * state, uint8_t * buf, int * flags,
  59. level_t * level, sample_t bias);
  60. void a52_dynrng (a52_state_t * state,
  61. level_t (* call) (level_t, void *), void * data);
  62. int a52_block (a52_state_t * state);
  63. void a52_free (a52_state_t * state);
  64. #endif /* A52_H */