| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * DCA compatible decoder | ||
| 3 | * Copyright (C) 2004 Gildas Bazin | ||
| 4 | * Copyright (C) 2004 Benjamin Zores | ||
| 5 | * Copyright (C) 2006 Benjamin Larsson | ||
| 6 | * Copyright (C) 2007 Konstantin Shishkov | ||
| 7 | * Copyright (C) 2016 foo86 | ||
| 8 | * | ||
| 9 | * This file is part of FFmpeg. | ||
| 10 | * | ||
| 11 | * FFmpeg is free software; you can redistribute it and/or | ||
| 12 | * modify it under the terms of the GNU Lesser General Public | ||
| 13 | * License as published by the Free Software Foundation; either | ||
| 14 | * version 2.1 of the License, or (at your option) any later version. | ||
| 15 | * | ||
| 16 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 19 | * Lesser General Public License for more details. | ||
| 20 | * | ||
| 21 | * You should have received a copy of the GNU Lesser General Public | ||
| 22 | * License along with FFmpeg; if not, write to the Free Software | ||
| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 24 | */ | ||
| 25 | |||
| 26 | #ifndef AVCODEC_DCA_H | ||
| 27 | #define AVCODEC_DCA_H | ||
| 28 | |||
| 29 | #include <stdint.h> | ||
| 30 | |||
| 31 | #include "libavutil/common.h" | ||
| 32 | #include "libavutil/intreadwrite.h" | ||
| 33 | |||
| 34 | #include "get_bits.h" | ||
| 35 | |||
| 36 | #define DCA_CORE_FRAME_HEADER_SIZE 18 | ||
| 37 | |||
| 38 | enum DCAParseError { | ||
| 39 | DCA_PARSE_ERROR_SYNC_WORD = -1, | ||
| 40 | DCA_PARSE_ERROR_DEFICIT_SAMPLES = -2, | ||
| 41 | DCA_PARSE_ERROR_PCM_BLOCKS = -3, | ||
| 42 | DCA_PARSE_ERROR_FRAME_SIZE = -4, | ||
| 43 | DCA_PARSE_ERROR_AMODE = -5, | ||
| 44 | DCA_PARSE_ERROR_SAMPLE_RATE = -6, | ||
| 45 | DCA_PARSE_ERROR_RESERVED_BIT = -7, | ||
| 46 | DCA_PARSE_ERROR_LFE_FLAG = -8, | ||
| 47 | DCA_PARSE_ERROR_PCM_RES = -9, | ||
| 48 | }; | ||
| 49 | |||
| 50 | typedef struct DCACoreFrameHeader { | ||
| 51 | uint8_t normal_frame; ///< Frame type | ||
| 52 | uint8_t deficit_samples; ///< Deficit sample count | ||
| 53 | uint8_t crc_present; ///< CRC present flag | ||
| 54 | uint8_t npcmblocks; ///< Number of PCM sample blocks | ||
| 55 | uint16_t frame_size; ///< Primary frame byte size | ||
| 56 | uint8_t audio_mode; ///< Audio channel arrangement | ||
| 57 | uint8_t sr_code; ///< Core audio sampling frequency | ||
| 58 | uint8_t br_code; ///< Transmission bit rate | ||
| 59 | uint8_t drc_present; ///< Embedded dynamic range flag | ||
| 60 | uint8_t ts_present; ///< Embedded time stamp flag | ||
| 61 | uint8_t aux_present; ///< Auxiliary data flag | ||
| 62 | uint8_t hdcd_master; ///< HDCD mastering flag | ||
| 63 | uint8_t ext_audio_type; ///< Extension audio descriptor flag | ||
| 64 | uint8_t ext_audio_present; ///< Extended coding flag | ||
| 65 | uint8_t sync_ssf; ///< Audio sync word insertion flag | ||
| 66 | uint8_t lfe_present; ///< Low frequency effects flag | ||
| 67 | uint8_t predictor_history; ///< Predictor history flag switch | ||
| 68 | uint8_t filter_perfect; ///< Multirate interpolator switch | ||
| 69 | uint8_t encoder_rev; ///< Encoder software revision | ||
| 70 | uint8_t copy_hist; ///< Copy history | ||
| 71 | uint8_t pcmr_code; ///< Source PCM resolution | ||
| 72 | uint8_t sumdiff_front; ///< Front sum/difference flag | ||
| 73 | uint8_t sumdiff_surround; ///< Surround sum/difference flag | ||
| 74 | uint8_t dn_code; ///< Dialog normalization / unspecified | ||
| 75 | } DCACoreFrameHeader; | ||
| 76 | |||
| 77 | enum DCASpeaker { | ||
| 78 | DCA_SPEAKER_C, DCA_SPEAKER_L, DCA_SPEAKER_R, DCA_SPEAKER_Ls, | ||
| 79 | DCA_SPEAKER_Rs, DCA_SPEAKER_LFE1, DCA_SPEAKER_Cs, DCA_SPEAKER_Lsr, | ||
| 80 | DCA_SPEAKER_Rsr, DCA_SPEAKER_Lss, DCA_SPEAKER_Rss, DCA_SPEAKER_Lc, | ||
| 81 | DCA_SPEAKER_Rc, DCA_SPEAKER_Lh, DCA_SPEAKER_Ch, DCA_SPEAKER_Rh, | ||
| 82 | DCA_SPEAKER_LFE2, DCA_SPEAKER_Lw, DCA_SPEAKER_Rw, DCA_SPEAKER_Oh, | ||
| 83 | DCA_SPEAKER_Lhs, DCA_SPEAKER_Rhs, DCA_SPEAKER_Chr, DCA_SPEAKER_Lhr, | ||
| 84 | DCA_SPEAKER_Rhr, DCA_SPEAKER_Cl, DCA_SPEAKER_Ll, DCA_SPEAKER_Rl, | ||
| 85 | DCA_SPEAKER_RSV1, DCA_SPEAKER_RSV2, DCA_SPEAKER_RSV3, DCA_SPEAKER_RSV4, | ||
| 86 | |||
| 87 | DCA_SPEAKER_COUNT | ||
| 88 | }; | ||
| 89 | |||
| 90 | enum DCASpeakerMask { | ||
| 91 | DCA_SPEAKER_MASK_C = 0x00000001, | ||
| 92 | DCA_SPEAKER_MASK_L = 0x00000002, | ||
| 93 | DCA_SPEAKER_MASK_R = 0x00000004, | ||
| 94 | DCA_SPEAKER_MASK_Ls = 0x00000008, | ||
| 95 | DCA_SPEAKER_MASK_Rs = 0x00000010, | ||
| 96 | DCA_SPEAKER_MASK_LFE1 = 0x00000020, | ||
| 97 | DCA_SPEAKER_MASK_Cs = 0x00000040, | ||
| 98 | DCA_SPEAKER_MASK_Lsr = 0x00000080, | ||
| 99 | DCA_SPEAKER_MASK_Rsr = 0x00000100, | ||
| 100 | DCA_SPEAKER_MASK_Lss = 0x00000200, | ||
| 101 | DCA_SPEAKER_MASK_Rss = 0x00000400, | ||
| 102 | DCA_SPEAKER_MASK_Lc = 0x00000800, | ||
| 103 | DCA_SPEAKER_MASK_Rc = 0x00001000, | ||
| 104 | DCA_SPEAKER_MASK_Lh = 0x00002000, | ||
| 105 | DCA_SPEAKER_MASK_Ch = 0x00004000, | ||
| 106 | DCA_SPEAKER_MASK_Rh = 0x00008000, | ||
| 107 | DCA_SPEAKER_MASK_LFE2 = 0x00010000, | ||
| 108 | DCA_SPEAKER_MASK_Lw = 0x00020000, | ||
| 109 | DCA_SPEAKER_MASK_Rw = 0x00040000, | ||
| 110 | DCA_SPEAKER_MASK_Oh = 0x00080000, | ||
| 111 | DCA_SPEAKER_MASK_Lhs = 0x00100000, | ||
| 112 | DCA_SPEAKER_MASK_Rhs = 0x00200000, | ||
| 113 | DCA_SPEAKER_MASK_Chr = 0x00400000, | ||
| 114 | DCA_SPEAKER_MASK_Lhr = 0x00800000, | ||
| 115 | DCA_SPEAKER_MASK_Rhr = 0x01000000, | ||
| 116 | DCA_SPEAKER_MASK_Cl = 0x02000000, | ||
| 117 | DCA_SPEAKER_MASK_Ll = 0x04000000, | ||
| 118 | DCA_SPEAKER_MASK_Rl = 0x08000000, | ||
| 119 | }; | ||
| 120 | |||
| 121 | #define DCA_SPEAKER_LAYOUT_MONO (DCA_SPEAKER_MASK_C) | ||
| 122 | #define DCA_SPEAKER_LAYOUT_STEREO (DCA_SPEAKER_MASK_L | DCA_SPEAKER_MASK_R) | ||
| 123 | #define DCA_SPEAKER_LAYOUT_2POINT1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_LFE1) | ||
| 124 | #define DCA_SPEAKER_LAYOUT_3_0 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_C) | ||
| 125 | #define DCA_SPEAKER_LAYOUT_2_1 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Cs) | ||
| 126 | #define DCA_SPEAKER_LAYOUT_3_1 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Cs) | ||
| 127 | #define DCA_SPEAKER_LAYOUT_2_2 (DCA_SPEAKER_LAYOUT_STEREO | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs) | ||
| 128 | #define DCA_SPEAKER_LAYOUT_5POINT0 (DCA_SPEAKER_LAYOUT_3_0 | DCA_SPEAKER_MASK_Ls | DCA_SPEAKER_MASK_Rs) | ||
| 129 | #define DCA_SPEAKER_LAYOUT_5POINT1 (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_LFE1) | ||
| 130 | #define DCA_SPEAKER_LAYOUT_7POINT0_WIDE (DCA_SPEAKER_LAYOUT_5POINT0 | DCA_SPEAKER_MASK_Lw | DCA_SPEAKER_MASK_Rw) | ||
| 131 | #define DCA_SPEAKER_LAYOUT_7POINT1_WIDE (DCA_SPEAKER_LAYOUT_7POINT0_WIDE | DCA_SPEAKER_MASK_LFE1) | ||
| 132 | |||
| 133 | #define DCA_HAS_STEREO(mask) \ | ||
| 134 | ((mask & DCA_SPEAKER_LAYOUT_STEREO) == DCA_SPEAKER_LAYOUT_STEREO) | ||
| 135 | |||
| 136 | enum DCASpeakerPair { | ||
| 137 | DCA_SPEAKER_PAIR_C = 0x0001, | ||
| 138 | DCA_SPEAKER_PAIR_LR = 0x0002, | ||
| 139 | DCA_SPEAKER_PAIR_LsRs = 0x0004, | ||
| 140 | DCA_SPEAKER_PAIR_LFE1 = 0x0008, | ||
| 141 | DCA_SPEAKER_PAIR_Cs = 0x0010, | ||
| 142 | DCA_SPEAKER_PAIR_LhRh = 0x0020, | ||
| 143 | DCA_SPEAKER_PAIR_LsrRsr = 0x0040, | ||
| 144 | DCA_SPEAKER_PAIR_Ch = 0x0080, | ||
| 145 | DCA_SPEAKER_PAIR_Oh = 0x0100, | ||
| 146 | DCA_SPEAKER_PAIR_LcRc = 0x0200, | ||
| 147 | DCA_SPEAKER_PAIR_LwRw = 0x0400, | ||
| 148 | DCA_SPEAKER_PAIR_LssRss = 0x0800, | ||
| 149 | DCA_SPEAKER_PAIR_LFE2 = 0x1000, | ||
| 150 | DCA_SPEAKER_PAIR_LhsRhs = 0x2000, | ||
| 151 | DCA_SPEAKER_PAIR_Chr = 0x4000, | ||
| 152 | DCA_SPEAKER_PAIR_LhrRhr = 0x8000 | ||
| 153 | }; | ||
| 154 | |||
| 155 | /** | ||
| 156 | * Return number of individual channels in DCASpeakerPair mask | ||
| 157 | */ | ||
| 158 | 7134 | static inline int ff_dca_count_chs_for_mask(unsigned int mask) | |
| 159 | { | ||
| 160 | 7134 | return av_popcount((mask & 0xffff) | ((mask & 0xae66) << 16)); | |
| 161 | } | ||
| 162 | |||
| 163 | enum DCARepresentationType { | ||
| 164 | DCA_REPR_TYPE_LtRt = 2, | ||
| 165 | DCA_REPR_TYPE_LhRh = 3 | ||
| 166 | }; | ||
| 167 | |||
| 168 | enum DCAExtensionMask { | ||
| 169 | DCA_CSS_CORE = 0x001, | ||
| 170 | DCA_CSS_XXCH = 0x002, | ||
| 171 | DCA_CSS_X96 = 0x004, | ||
| 172 | DCA_CSS_XCH = 0x008, | ||
| 173 | DCA_CSS_MASK = 0x00f, | ||
| 174 | DCA_EXSS_CORE = 0x010, | ||
| 175 | DCA_EXSS_XBR = 0x020, | ||
| 176 | DCA_EXSS_XXCH = 0x040, | ||
| 177 | DCA_EXSS_X96 = 0x080, | ||
| 178 | DCA_EXSS_LBR = 0x100, | ||
| 179 | DCA_EXSS_XLL = 0x200, | ||
| 180 | DCA_EXSS_RSV1 = 0x400, | ||
| 181 | DCA_EXSS_RSV2 = 0x800, | ||
| 182 | DCA_EXSS_MASK = 0xff0, | ||
| 183 | }; | ||
| 184 | |||
| 185 | enum DCADownMixType { | ||
| 186 | DCA_DMIX_TYPE_1_0, | ||
| 187 | DCA_DMIX_TYPE_LoRo, | ||
| 188 | DCA_DMIX_TYPE_LtRt, | ||
| 189 | DCA_DMIX_TYPE_3_0, | ||
| 190 | DCA_DMIX_TYPE_2_1, | ||
| 191 | DCA_DMIX_TYPE_2_2, | ||
| 192 | DCA_DMIX_TYPE_3_1, | ||
| 193 | |||
| 194 | DCA_DMIX_TYPE_COUNT | ||
| 195 | }; | ||
| 196 | |||
| 197 | extern const uint32_t ff_dca_sample_rates[16]; | ||
| 198 | extern const uint32_t ff_dca_sampling_freqs[16]; | ||
| 199 | extern const uint8_t ff_dca_freq_ranges[16]; | ||
| 200 | extern const uint8_t ff_dca_bits_per_sample[8]; | ||
| 201 | |||
| 202 | |||
| 203 | /** | ||
| 204 | * Convert bitstream to one representation based on sync marker | ||
| 205 | */ | ||
| 206 | int avpriv_dca_convert_bitstream(const uint8_t *src, int src_size, uint8_t *dst, | ||
| 207 | int max_size); | ||
| 208 | |||
| 209 | /** | ||
| 210 | * Parse and validate core frame header | ||
| 211 | * @param[out] h Pointer to struct where header info is written. | ||
| 212 | * @param[in] buf Pointer to the data buffer | ||
| 213 | * @param[in] size Size of the data buffer | ||
| 214 | * @return 0 on success, negative AVERROR code on failure | ||
| 215 | */ | ||
| 216 | int avpriv_dca_parse_core_frame_header(DCACoreFrameHeader *h, const uint8_t *buf, int size); | ||
| 217 | |||
| 218 | /** | ||
| 219 | * Parse and validate core frame header | ||
| 220 | * @param[out] h Pointer to struct where header info is written. | ||
| 221 | * @param[in] gbc BitContext containing the first 120 bits of the frame. | ||
| 222 | * @return 0 on success, negative DCA_PARSE_ERROR_ code on failure | ||
| 223 | */ | ||
| 224 | int ff_dca_parse_core_frame_header(DCACoreFrameHeader *h, GetBitContext *gb); | ||
| 225 | |||
| 226 | #endif /* AVCODEC_DCA_H */ | ||
| 227 |