2 * MLP parser prototypes
3 * Copyright (c) 2007 Ian Caulfield
5 * This file is part of Libav.
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.
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.
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
24 * MLP parser prototypes
27 #ifndef AVCODEC_MLP_PARSER_H
28 #define AVCODEC_MLP_PARSER_H
30 #include "bitstream.h"
32 typedef struct MLPHeaderInfo
34 int stream_type; ///< 0xBB for MLP, 0xBA for TrueHD
35 int header_size; ///< Size of the major sync header, in bytes
37 int group1_bits; ///< The bit depth of the first substream
38 int group2_bits; ///< Bit depth of the second substream (MLP only)
40 int group1_samplerate; ///< Sample rate of first substream
41 int group2_samplerate; ///< Sample rate of second substream (MLP only)
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")
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")
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
57 int is_vbr; ///< Stream is VBR instead of CBR
58 int peak_bitrate; ///< Peak bitrate for VBR, actual bitrate (==peak) for CBR
60 int num_substreams; ///< Number of substreams within stream
64 int ff_mlp_read_major_sync(void *log, MLPHeaderInfo *mh, BitstreamContext *bc);
66 #endif /* AVCODEC_MLP_PARSER_H */