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FFmpeg/libavcodec/mlp_parser.h

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  1. /*

  2.  * MLP parser prototypes

  3.  * Copyright (c) 2007 Ian Caulfield

  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. 

  22. /**

  23.  * @file

  24.  * MLP parser prototypes

  25.  */

  26. 

  27. #ifndef AVCODEC_MLP_PARSER_H

  28. #define AVCODEC_MLP_PARSER_H

  29. 

  30. #include "bitstream.h"

  31. 

  32. typedef struct MLPHeaderInfo

  33. {

  34.     int stream_type;                        ///< 0xBB for MLP, 0xBA for TrueHD

  35.     int header_size;                        ///< Size of the major sync header, in bytes

  36. 

  37.     int group1_bits;                        ///< The bit depth of the first substream

  38.     int group2_bits;                        ///< Bit depth of the second substream (MLP only)

  39. 

  40.     int group1_samplerate;                  ///< Sample rate of first substream

  41.     int group2_samplerate;                  ///< Sample rate of second substream (MLP only)

  42. 

  43.     int channel_modifier_thd_stream0;       ///< Channel modifier for substream 0 of TrueHD streams ("2-channel presentation")

  44.     int channel_modifier_thd_stream1;       ///< Channel modifier for substream 1 of TrueHD streams ("6-channel presentation")

  45.     int channel_modifier_thd_stream2;       ///< Channel modifier for substream 2 of TrueHD streams ("8-channel presentation")

  46. 

  47.     int channels_mlp;                       ///< Channel count for MLP streams

  48.     int channels_thd_stream1;               ///< Channel count for substream 1 of TrueHD streams ("6-channel presentation")

  49.     int channels_thd_stream2;               ///< Channel count for substream 2 of TrueHD streams ("8-channel presentation")

  50.     uint64_t channel_layout_mlp;            ///< Channel layout for MLP streams

  51.     uint64_t channel_layout_thd_stream1;    ///< Channel layout for substream 1 of TrueHD streams ("6-channel presentation")

  52.     uint64_t channel_layout_thd_stream2;    ///< Channel layout for substream 2 of TrueHD streams ("8-channel presentation")

  53. 

  54.     int access_unit_size;                   ///< Number of samples per coded frame

  55.     int access_unit_size_pow2;              ///< Next power of two above number of samples per frame

  56. 

  57.     int is_vbr;                             ///< Stream is VBR instead of CBR

  58.     int peak_bitrate;                       ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR

  59. 

  60.     int num_substreams;                     ///< Number of substreams within stream

  61. } MLPHeaderInfo;

  62. 

  63. 

  64. int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, BitstreamContext *bc);

  65. 

  66. #endif /* AVCODEC_MLP_PARSER_H */