1 /*
2 * TAK decoder/demuxer common code
3 * Copyright (c) 2012 Paul B Mahol
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 /**
23 * @file
24 * TAK (Tom's lossless Audio Kompressor) decoder/demuxer common functions
25 */
26
27 #ifndef AVCODEC_TAK_H
28 #define AVCODEC_TAK_H
29
30 #include <stdint.h>
31
34
35 #define TAK_FORMAT_DATA_TYPE_BITS 3
36 #define TAK_FORMAT_SAMPLE_RATE_BITS 18
37 #define TAK_FORMAT_BPS_BITS 5
38 #define TAK_FORMAT_CHANNEL_BITS 4
39 #define TAK_FORMAT_VALID_BITS 5
40 #define TAK_FORMAT_CH_LAYOUT_BITS 6
41 #define TAK_SIZE_FRAME_DURATION_BITS 4
42 #define TAK_SIZE_SAMPLES_NUM_BITS 35
43 #define TAK_LAST_FRAME_POS_BITS 40
44 #define TAK_LAST_FRAME_SIZE_BITS 24
45 #define TAK_ENCODER_CODEC_BITS 6
46 #define TAK_ENCODER_PROFILE_BITS 4
47 #define TAK_ENCODER_VERSION_BITS 24
48 #define TAK_SAMPLE_RATE_MIN 6000
49 #define TAK_CHANNELS_MIN 1
51 #define TAK_FRAME_HEADER_FLAGS_BITS 3
52 #define TAK_FRAME_HEADER_SYNC_ID 0xA0FF
53 #define TAK_FRAME_HEADER_SYNC_ID_BITS 16
54 #define TAK_FRAME_HEADER_SAMPLE_COUNT_BITS 14
55 #define TAK_FRAME_HEADER_NO_BITS 21
56 #define TAK_FRAME_DURATION_QUANT_SHIFT 5
57 #define TAK_CRC24_BITS 24
58
59
60 #define TAK_FRAME_FLAG_IS_LAST 0x1
61 #define TAK_FRAME_FLAG_HAS_INFO 0x2
62 #define TAK_FRAME_FLAG_HAS_METADATA 0x4
63
64 #define TAK_MAX_CHANNELS (1 << TAK_FORMAT_CHANNEL_BITS)
65
66 #define TAK_MIN_FRAME_HEADER_BITS (TAK_FRAME_HEADER_SYNC_ID_BITS + \
67 TAK_FRAME_HEADER_FLAGS_BITS + \
68 TAK_FRAME_HEADER_NO_BITS + \
69 TAK_CRC24_BITS)
70
71 #define TAK_MIN_FRAME_HEADER_LAST_BITS (TAK_MIN_FRAME_HEADER_BITS + 2 + \
72 TAK_FRAME_HEADER_SAMPLE_COUNT_BITS)
73
74 #define TAK_ENCODER_BITS (TAK_ENCODER_CODEC_BITS + \
75 TAK_ENCODER_PROFILE_BITS)
76
77 #define TAK_SIZE_BITS (TAK_SIZE_SAMPLES_NUM_BITS + \
78 TAK_SIZE_FRAME_DURATION_BITS)
79
80 #define TAK_FORMAT_BITS (TAK_FORMAT_DATA_TYPE_BITS + \
81 TAK_FORMAT_SAMPLE_RATE_BITS + \
82 TAK_FORMAT_BPS_BITS + \
83 TAK_FORMAT_CHANNEL_BITS + 1 + \
84 TAK_FORMAT_VALID_BITS + 1 + \
85 TAK_FORMAT_CH_LAYOUT_BITS * \
86 TAK_MAX_CHANNELS)
87
88 #define TAK_STREAMINFO_BITS (TAK_ENCODER_BITS + \
89 TAK_SIZE_BITS + \
90 TAK_FORMAT_BITS)
91
92 #define TAK_MAX_FRAME_HEADER_BITS (TAK_MIN_FRAME_HEADER_LAST_BITS + \
93 TAK_STREAMINFO_BITS + 31)
94
95 #define TAK_STREAMINFO_BYTES ((TAK_STREAMINFO_BITS + 7) / 8)
96 #define TAK_MAX_FRAME_HEADER_BYTES ((TAK_MAX_FRAME_HEADER_BITS + 7) / 8)
97 #define TAK_MIN_FRAME_HEADER_BYTES ((TAK_MIN_FRAME_HEADER_BITS + 7) / 8)
98
102 };
103
113 };
114
126 };
127
141
143
144 /**
145 * Parse the Streaminfo metadata block.
146 * @param[out] s storage for parsed information
147 * @param[in] buf input buffer
148 * @param[in] size size of input buffer in bytes
149 * @return non-zero on error, 0 if OK
150 */
152
154
155 /**
156 * Validate and decode a frame header.
157 * @param avctx AVCodecContext to use as av_log() context
158 * @param[in] gb GetBitContext from which to read frame header
159 * @param[out] s frame information
160 * @param log_level_offset log level offset, can be used to silence
161 * error messages.
162 * @return non-zero on error, 0 if OK
163 */
166 #endif /* AVCODEC_TAK_H */