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  1. /*
  2. * FLAC (Free Lossless Audio Codec) decoder/demuxer common functions
  3. * Copyright (c) 2008 Justin Ruggles
  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. * @file flac.h
  23. * FLAC (Free Lossless Audio Codec) decoder/demuxer common functions
  24. */
  25. #ifndef AVCODEC_FLAC_H
  26. #define AVCODEC_FLAC_H
  27. #include "avcodec.h"
  28. /**
  29. * Data needed from the Streaminfo header for use by the raw FLAC demuxer
  30. * and/or the FLAC decoder.
  31. */
  32. #define FLACSTREAMINFO \
  33. int min_blocksize; /**< minimum block size, in samples */\
  34. int max_blocksize; /**< maximum block size, in samples */\
  35. int max_framesize; /**< maximum frame size, in bytes */\
  36. int samplerate; /**< sample rate */\
  37. int channels; /**< number of channels */\
  38. int bps; /**< bits-per-sample */\
  39. typedef struct FLACStreaminfo {
  40. FLACSTREAMINFO
  41. } FLACStreaminfo;
  42. /**
  43. * Parse the Streaminfo metadata block
  44. * @param[out] avctx codec context to set basic stream parameters
  45. * @param[out] s where parsed information is stored
  46. * @param[in] buffer pointer to start of 34-byte streaminfo data
  47. */
  48. void ff_flac_parse_streaminfo(AVCodecContext *avctx, struct FLACStreaminfo *s,
  49. const uint8_t *buffer);
  50. #endif /* AVCODEC_FLAC_H */