| 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 | * |
| 8 | * This file is part of FFmpeg. |
| 9 | * |
| 10 | * FFmpeg is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU Lesser General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2.1 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * FFmpeg is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * Lesser General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU Lesser General Public |
| 21 | * License along with FFmpeg; if not, write to the Free Software |
| 22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 23 | */ |
| 24 | |
| 25 | #include <math.h> |
| 26 | #include <stddef.h> |
| 27 | #include <stdio.h> |
| 28 | |
| 29 | #include "libavutil/channel_layout.h" |
| 30 | #include "libavutil/common.h" |
| 31 | #include "libavutil/float_dsp.h" |
| 32 | #include "libavutil/internal.h" |
| 33 | #include "libavutil/intreadwrite.h" |
| 34 | #include "libavutil/mathematics.h" |
| 35 | #include "libavutil/opt.h" |
| 36 | #include "libavutil/samplefmt.h" |
| 37 | #include "avcodec.h" |
| 38 | #include "fft.h" |
| 39 | #include "get_bits.h" |
| 40 | #include "dcadata.h" |
| 41 | #include "dcahuff.h" |
| 42 | #include "dca.h" |
| 43 | #include "mathops.h" |
| 44 | #include "synth_filter.h" |
| 45 | #include "dcadsp.h" |
| 46 | #include "fmtconvert.h" |
| 47 | #include "internal.h" |
| 48 | |
| 49 | #if ARCH_ARM |
| 50 | # include "arm/dca.h" |
| 51 | #endif |
| 52 | |
| 53 | //#define TRACE |
| 54 | |
| 55 | #define DCA_PRIM_CHANNELS_MAX (7) |
| 56 | #define DCA_ABITS_MAX (32) /* Should be 28 */ |
| 57 | #define DCA_SUBSUBFRAMES_MAX (4) |
| 58 | #define DCA_SUBFRAMES_MAX (16) |
| 59 | #define DCA_BLOCKS_MAX (16) |
| 60 | #define DCA_LFE_MAX (3) |
| 61 | #define DCA_CHSETS_MAX (4) |
| 62 | #define DCA_CHSET_CHANS_MAX (8) |
| 63 | |
| 64 | enum DCAMode { |
| 65 | DCA_MONO = 0, |
| 66 | DCA_CHANNEL, |
| 67 | DCA_STEREO, |
| 68 | DCA_STEREO_SUMDIFF, |
| 69 | DCA_STEREO_TOTAL, |
| 70 | DCA_3F, |
| 71 | DCA_2F1R, |
| 72 | DCA_3F1R, |
| 73 | DCA_2F2R, |
| 74 | DCA_3F2R, |
| 75 | DCA_4F2R |
| 76 | }; |
| 77 | |
| 78 | /* these are unconfirmed but should be mostly correct */ |
| 79 | enum DCAExSSSpeakerMask { |
| 80 | DCA_EXSS_FRONT_CENTER = 0x0001, |
| 81 | DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002, |
| 82 | DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004, |
| 83 | DCA_EXSS_LFE = 0x0008, |
| 84 | DCA_EXSS_REAR_CENTER = 0x0010, |
| 85 | DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020, |
| 86 | DCA_EXSS_REAR_LEFT_RIGHT = 0x0040, |
| 87 | DCA_EXSS_FRONT_HIGH_CENTER = 0x0080, |
| 88 | DCA_EXSS_OVERHEAD = 0x0100, |
| 89 | DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200, |
| 90 | DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400, |
| 91 | DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800, |
| 92 | DCA_EXSS_LFE2 = 0x1000, |
| 93 | DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000, |
| 94 | DCA_EXSS_REAR_HIGH_CENTER = 0x4000, |
| 95 | DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000, |
| 96 | }; |
| 97 | |
| 98 | enum DCAXxchSpeakerMask { |
| 99 | DCA_XXCH_FRONT_CENTER = 0x0000001, |
| 100 | DCA_XXCH_FRONT_LEFT = 0x0000002, |
| 101 | DCA_XXCH_FRONT_RIGHT = 0x0000004, |
| 102 | DCA_XXCH_SIDE_REAR_LEFT = 0x0000008, |
| 103 | DCA_XXCH_SIDE_REAR_RIGHT = 0x0000010, |
| 104 | DCA_XXCH_LFE1 = 0x0000020, |
| 105 | DCA_XXCH_REAR_CENTER = 0x0000040, |
| 106 | DCA_XXCH_SURROUND_REAR_LEFT = 0x0000080, |
| 107 | DCA_XXCH_SURROUND_REAR_RIGHT = 0x0000100, |
| 108 | DCA_XXCH_SIDE_SURROUND_LEFT = 0x0000200, |
| 109 | DCA_XXCH_SIDE_SURROUND_RIGHT = 0x0000400, |
| 110 | DCA_XXCH_FRONT_CENTER_LEFT = 0x0000800, |
| 111 | DCA_XXCH_FRONT_CENTER_RIGHT = 0x0001000, |
| 112 | DCA_XXCH_FRONT_HIGH_LEFT = 0x0002000, |
| 113 | DCA_XXCH_FRONT_HIGH_CENTER = 0x0004000, |
| 114 | DCA_XXCH_FRONT_HIGH_RIGHT = 0x0008000, |
| 115 | DCA_XXCH_LFE2 = 0x0010000, |
| 116 | DCA_XXCH_SIDE_FRONT_LEFT = 0x0020000, |
| 117 | DCA_XXCH_SIDE_FRONT_RIGHT = 0x0040000, |
| 118 | DCA_XXCH_OVERHEAD = 0x0080000, |
| 119 | DCA_XXCH_SIDE_HIGH_LEFT = 0x0100000, |
| 120 | DCA_XXCH_SIDE_HIGH_RIGHT = 0x0200000, |
| 121 | DCA_XXCH_REAR_HIGH_CENTER = 0x0400000, |
| 122 | DCA_XXCH_REAR_HIGH_LEFT = 0x0800000, |
| 123 | DCA_XXCH_REAR_HIGH_RIGHT = 0x1000000, |
| 124 | DCA_XXCH_REAR_LOW_CENTER = 0x2000000, |
| 125 | DCA_XXCH_REAR_LOW_LEFT = 0x4000000, |
| 126 | DCA_XXCH_REAR_LOW_RIGHT = 0x8000000, |
| 127 | }; |
| 128 | |
| 129 | static const uint32_t map_xxch_to_native[28] = { |
| 130 | AV_CH_FRONT_CENTER, |
| 131 | AV_CH_FRONT_LEFT, |
| 132 | AV_CH_FRONT_RIGHT, |
| 133 | AV_CH_SIDE_LEFT, |
| 134 | AV_CH_SIDE_RIGHT, |
| 135 | AV_CH_LOW_FREQUENCY, |
| 136 | AV_CH_BACK_CENTER, |
| 137 | AV_CH_BACK_LEFT, |
| 138 | AV_CH_BACK_RIGHT, |
| 139 | AV_CH_SIDE_LEFT, /* side surround left -- dup sur side L */ |
| 140 | AV_CH_SIDE_RIGHT, /* side surround right -- dup sur side R */ |
| 141 | AV_CH_FRONT_LEFT_OF_CENTER, |
| 142 | AV_CH_FRONT_RIGHT_OF_CENTER, |
| 143 | AV_CH_TOP_FRONT_LEFT, |
| 144 | AV_CH_TOP_FRONT_CENTER, |
| 145 | AV_CH_TOP_FRONT_RIGHT, |
| 146 | AV_CH_LOW_FREQUENCY, /* lfe2 -- duplicate lfe1 position */ |
| 147 | AV_CH_FRONT_LEFT_OF_CENTER, /* side front left -- dup front cntr L */ |
| 148 | AV_CH_FRONT_RIGHT_OF_CENTER,/* side front right -- dup front cntr R */ |
| 149 | AV_CH_TOP_CENTER, /* overhead */ |
| 150 | AV_CH_TOP_FRONT_LEFT, /* side high left -- dup */ |
| 151 | AV_CH_TOP_FRONT_RIGHT, /* side high right -- dup */ |
| 152 | AV_CH_TOP_BACK_CENTER, |
| 153 | AV_CH_TOP_BACK_LEFT, |
| 154 | AV_CH_TOP_BACK_RIGHT, |
| 155 | AV_CH_BACK_CENTER, /* rear low center -- dup */ |
| 156 | AV_CH_BACK_LEFT, /* rear low left -- dup */ |
| 157 | AV_CH_BACK_RIGHT /* read low right -- dup */ |
| 158 | }; |
| 159 | |
| 160 | enum DCAExtensionMask { |
| 161 | DCA_EXT_CORE = 0x001, ///< core in core substream |
| 162 | DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream |
| 163 | DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream |
| 164 | DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream |
| 165 | DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream) |
| 166 | DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS |
| 167 | DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS |
| 168 | DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS |
| 169 | DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS |
| 170 | DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS |
| 171 | }; |
| 172 | |
| 173 | /* -1 are reserved or unknown */ |
| 174 | static const int dca_ext_audio_descr_mask[] = { |
| 175 | DCA_EXT_XCH, |
| 176 | -1, |
| 177 | DCA_EXT_X96, |
| 178 | DCA_EXT_XCH | DCA_EXT_X96, |
| 179 | -1, |
| 180 | -1, |
| 181 | DCA_EXT_XXCH, |
| 182 | -1, |
| 183 | }; |
| 184 | |
| 185 | /* extensions that reside in core substream */ |
| 186 | #define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96) |
| 187 | |
| 188 | /* Tables for mapping dts channel configurations to libavcodec multichannel api. |
| 189 | * Some compromises have been made for special configurations. Most configurations |
| 190 | * are never used so complete accuracy is not needed. |
| 191 | * |
| 192 | * L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead. |
| 193 | * S -> side, when both rear and back are configured move one of them to the side channel |
| 194 | * OV -> center back |
| 195 | * All 2 channel configurations -> AV_CH_LAYOUT_STEREO |
| 196 | */ |
| 197 | static const uint64_t dca_core_channel_layout[] = { |
| 198 | AV_CH_FRONT_CENTER, ///< 1, A |
| 199 | AV_CH_LAYOUT_STEREO, ///< 2, A + B (dual mono) |
| 200 | AV_CH_LAYOUT_STEREO, ///< 2, L + R (stereo) |
| 201 | AV_CH_LAYOUT_STEREO, ///< 2, (L + R) + (L - R) (sum-difference) |
| 202 | AV_CH_LAYOUT_STEREO, ///< 2, LT + RT (left and right total) |
| 203 | AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER, ///< 3, C + L + R |
| 204 | AV_CH_LAYOUT_STEREO | AV_CH_BACK_CENTER, ///< 3, L + R + S |
| 205 | AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 4, C + L + R + S |
| 206 | AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 4, L + R + SL + SR |
| 207 | |
| 208 | AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_SIDE_LEFT | |
| 209 | AV_CH_SIDE_RIGHT, ///< 5, C + L + R + SL + SR |
| 210 | |
| 211 | AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | |
| 212 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR |
| 213 | |
| 214 | AV_CH_LAYOUT_STEREO | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT | |
| 215 | AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 6, C + L + R + LR + RR + OV |
| 216 | |
| 217 | AV_CH_FRONT_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | |
| 218 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_BACK_CENTER | |
| 219 | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 6, CF + CR + LF + RF + LR + RR |
| 220 | |
| 221 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | |
| 222 | AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | |
| 223 | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR |
| 224 | |
| 225 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER | |
| 226 | AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT | |
| 227 | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2 + SR1 + SR2 |
| 228 | |
| 229 | AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER | |
| 230 | AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO | |
| 231 | AV_CH_SIDE_LEFT | AV_CH_BACK_CENTER | AV_CH_SIDE_RIGHT, ///< 8, CL + C + CR + L + R + SL + S + SR |
| 232 | }; |
| 233 | |
| 234 | static const int8_t dca_lfe_index[] = { |
| 235 | 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3 |
| 236 | }; |
| 237 | |
| 238 | static const int8_t dca_channel_reorder_lfe[][9] = { |
| 239 | { 0, -1, -1, -1, -1, -1, -1, -1, -1}, |
| 240 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 241 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 242 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 243 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 244 | { 2, 0, 1, -1, -1, -1, -1, -1, -1}, |
| 245 | { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| 246 | { 2, 0, 1, 4, -1, -1, -1, -1, -1}, |
| 247 | { 0, 1, 3, 4, -1, -1, -1, -1, -1}, |
| 248 | { 2, 0, 1, 4, 5, -1, -1, -1, -1}, |
| 249 | { 3, 4, 0, 1, 5, 6, -1, -1, -1}, |
| 250 | { 2, 0, 1, 4, 5, 6, -1, -1, -1}, |
| 251 | { 0, 6, 4, 5, 2, 3, -1, -1, -1}, |
| 252 | { 4, 2, 5, 0, 1, 6, 7, -1, -1}, |
| 253 | { 5, 6, 0, 1, 7, 3, 8, 4, -1}, |
| 254 | { 4, 2, 5, 0, 1, 6, 8, 7, -1}, |
| 255 | }; |
| 256 | |
| 257 | static const int8_t dca_channel_reorder_lfe_xch[][9] = { |
| 258 | { 0, 2, -1, -1, -1, -1, -1, -1, -1}, |
| 259 | { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| 260 | { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| 261 | { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| 262 | { 0, 1, 3, -1, -1, -1, -1, -1, -1}, |
| 263 | { 2, 0, 1, 4, -1, -1, -1, -1, -1}, |
| 264 | { 0, 1, 3, 4, -1, -1, -1, -1, -1}, |
| 265 | { 2, 0, 1, 4, 5, -1, -1, -1, -1}, |
| 266 | { 0, 1, 4, 5, 3, -1, -1, -1, -1}, |
| 267 | { 2, 0, 1, 5, 6, 4, -1, -1, -1}, |
| 268 | { 3, 4, 0, 1, 6, 7, 5, -1, -1}, |
| 269 | { 2, 0, 1, 4, 5, 6, 7, -1, -1}, |
| 270 | { 0, 6, 4, 5, 2, 3, 7, -1, -1}, |
| 271 | { 4, 2, 5, 0, 1, 7, 8, 6, -1}, |
| 272 | { 5, 6, 0, 1, 8, 3, 9, 4, 7}, |
| 273 | { 4, 2, 5, 0, 1, 6, 9, 8, 7}, |
| 274 | }; |
| 275 | |
| 276 | static const int8_t dca_channel_reorder_nolfe[][9] = { |
| 277 | { 0, -1, -1, -1, -1, -1, -1, -1, -1}, |
| 278 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 279 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 280 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 281 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 282 | { 2, 0, 1, -1, -1, -1, -1, -1, -1}, |
| 283 | { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| 284 | { 2, 0, 1, 3, -1, -1, -1, -1, -1}, |
| 285 | { 0, 1, 2, 3, -1, -1, -1, -1, -1}, |
| 286 | { 2, 0, 1, 3, 4, -1, -1, -1, -1}, |
| 287 | { 2, 3, 0, 1, 4, 5, -1, -1, -1}, |
| 288 | { 2, 0, 1, 3, 4, 5, -1, -1, -1}, |
| 289 | { 0, 5, 3, 4, 1, 2, -1, -1, -1}, |
| 290 | { 3, 2, 4, 0, 1, 5, 6, -1, -1}, |
| 291 | { 4, 5, 0, 1, 6, 2, 7, 3, -1}, |
| 292 | { 3, 2, 4, 0, 1, 5, 7, 6, -1}, |
| 293 | }; |
| 294 | |
| 295 | static const int8_t dca_channel_reorder_nolfe_xch[][9] = { |
| 296 | { 0, 1, -1, -1, -1, -1, -1, -1, -1}, |
| 297 | { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| 298 | { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| 299 | { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| 300 | { 0, 1, 2, -1, -1, -1, -1, -1, -1}, |
| 301 | { 2, 0, 1, 3, -1, -1, -1, -1, -1}, |
| 302 | { 0, 1, 2, 3, -1, -1, -1, -1, -1}, |
| 303 | { 2, 0, 1, 3, 4, -1, -1, -1, -1}, |
| 304 | { 0, 1, 3, 4, 2, -1, -1, -1, -1}, |
| 305 | { 2, 0, 1, 4, 5, 3, -1, -1, -1}, |
| 306 | { 2, 3, 0, 1, 5, 6, 4, -1, -1}, |
| 307 | { 2, 0, 1, 3, 4, 5, 6, -1, -1}, |
| 308 | { 0, 5, 3, 4, 1, 2, 6, -1, -1}, |
| 309 | { 3, 2, 4, 0, 1, 6, 7, 5, -1}, |
| 310 | { 4, 5, 0, 1, 7, 2, 8, 3, 6}, |
| 311 | { 3, 2, 4, 0, 1, 5, 8, 7, 6}, |
| 312 | }; |
| 313 | |
| 314 | #define DCA_DOLBY 101 /* FIXME */ |
| 315 | |
| 316 | #define DCA_CHANNEL_BITS 6 |
| 317 | #define DCA_CHANNEL_MASK 0x3F |
| 318 | |
| 319 | #define DCA_LFE 0x80 |
| 320 | |
| 321 | #define HEADER_SIZE 14 |
| 322 | |
| 323 | #define DCA_MAX_FRAME_SIZE 16384 |
| 324 | #define DCA_MAX_EXSS_HEADER_SIZE 4096 |
| 325 | |
| 326 | #define DCA_BUFFER_PADDING_SIZE 1024 |
| 327 | |
| 328 | #define DCA_NSYNCAUX 0x9A1105A0 |
| 329 | |
| 330 | /** Bit allocation */ |
| 331 | typedef struct { |
| 332 | int offset; ///< code values offset |
| 333 | int maxbits[8]; ///< max bits in VLC |
| 334 | int wrap; ///< wrap for get_vlc2() |
| 335 | VLC vlc[8]; ///< actual codes |
| 336 | } BitAlloc; |
| 337 | |
| 338 | static BitAlloc dca_bitalloc_index; ///< indexes for samples VLC select |
| 339 | static BitAlloc dca_tmode; ///< transition mode VLCs |
| 340 | static BitAlloc dca_scalefactor; ///< scalefactor VLCs |
| 341 | static BitAlloc dca_smpl_bitalloc[11]; ///< samples VLCs |
| 342 | |
| 343 | static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba, |
| 344 | int idx) |
| 345 | { |
| 346 | return get_vlc2(gb, ba->vlc[idx].table, ba->vlc[idx].bits, ba->wrap) + |
| 347 | ba->offset; |
| 348 | } |
| 349 | |
| 350 | typedef struct { |
| 351 | const AVClass *class; ///< class for AVOptions |
| 352 | AVCodecContext *avctx; |
| 353 | /* Frame header */ |
| 354 | int frame_type; ///< type of the current frame |
| 355 | int samples_deficit; ///< deficit sample count |
| 356 | int crc_present; ///< crc is present in the bitstream |
| 357 | int sample_blocks; ///< number of PCM sample blocks |
| 358 | int frame_size; ///< primary frame byte size |
| 359 | int amode; ///< audio channels arrangement |
| 360 | int sample_rate; ///< audio sampling rate |
| 361 | int bit_rate; ///< transmission bit rate |
| 362 | int bit_rate_index; ///< transmission bit rate index |
| 363 | |
| 364 | int dynrange; ///< embedded dynamic range flag |
| 365 | int timestamp; ///< embedded time stamp flag |
| 366 | int aux_data; ///< auxiliary data flag |
| 367 | int hdcd; ///< source material is mastered in HDCD |
| 368 | int ext_descr; ///< extension audio descriptor flag |
| 369 | int ext_coding; ///< extended coding flag |
| 370 | int aspf; ///< audio sync word insertion flag |
| 371 | int lfe; ///< low frequency effects flag |
| 372 | int predictor_history; ///< predictor history flag |
| 373 | int header_crc; ///< header crc check bytes |
| 374 | int multirate_inter; ///< multirate interpolator switch |
| 375 | int version; ///< encoder software revision |
| 376 | int copy_history; ///< copy history |
| 377 | int source_pcm_res; ///< source pcm resolution |
| 378 | int front_sum; ///< front sum/difference flag |
| 379 | int surround_sum; ///< surround sum/difference flag |
| 380 | int dialog_norm; ///< dialog normalisation parameter |
| 381 | |
| 382 | /* Primary audio coding header */ |
| 383 | int subframes; ///< number of subframes |
| 384 | int total_channels; ///< number of channels including extensions |
| 385 | int prim_channels; ///< number of primary audio channels |
| 386 | int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count |
| 387 | int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband |
| 388 | int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index |
| 389 | int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book |
| 390 | int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book |
| 391 | int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select |
| 392 | int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select |
| 393 | float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment |
| 394 | |
| 395 | /* Primary audio coding side information */ |
| 396 | int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes |
| 397 | int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count |
| 398 | int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not) |
| 399 | int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs |
| 400 | int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index |
| 401 | int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients) |
| 402 | int32_t scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2];///< scale factors (2 if transient) |
| 403 | int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook |
| 404 | int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors |
| 405 | float downmix_coef[DCA_PRIM_CHANNELS_MAX + 1][2]; ///< stereo downmix coefficients |
| 406 | int dynrange_coef; ///< dynamic range coefficient |
| 407 | |
| 408 | /* Core substream's embedded downmix coefficients (cf. ETSI TS 102 114 V1.4.1) |
| 409 | * Input: primary audio channels (incl. LFE if present) |
| 410 | * Output: downmix audio channels (up to 4, no LFE) */ |
| 411 | uint8_t core_downmix; ///< embedded downmix coefficients available |
| 412 | uint8_t core_downmix_amode; ///< audio channel arrangement of embedded downmix |
| 413 | uint16_t core_downmix_codes[DCA_PRIM_CHANNELS_MAX + 1][4]; ///< embedded downmix coefficients (9-bit codes) |
| 414 | |
| 415 | int32_t high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands |
| 416 | |
| 417 | float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data |
| 418 | int lfe_scale_factor; |
| 419 | |
| 420 | /* Subband samples history (for ADPCM) */ |
| 421 | DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4]; |
| 422 | DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512]; |
| 423 | DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32]; |
| 424 | int hist_index[DCA_PRIM_CHANNELS_MAX]; |
| 425 | DECLARE_ALIGNED(32, float, raXin)[32]; |
| 426 | |
| 427 | int output; ///< type of output |
| 428 | |
| 429 | DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8]; |
| 430 | float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1]; |
| 431 | float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1]; |
| 432 | uint8_t *extra_channels_buffer; |
| 433 | unsigned int extra_channels_buffer_size; |
| 434 | |
| 435 | uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE]; |
| 436 | int dca_buffer_size; ///< how much data is in the dca_buffer |
| 437 | |
| 438 | const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe |
| 439 | GetBitContext gb; |
| 440 | /* Current position in DCA frame */ |
| 441 | int current_subframe; |
| 442 | int current_subsubframe; |
| 443 | |
| 444 | int core_ext_mask; ///< present extensions in the core substream |
| 445 | |
| 446 | /* XCh extension information */ |
| 447 | int xch_present; ///< XCh extension present and valid |
| 448 | int xch_base_channel; ///< index of first (only) channel containing XCH data |
| 449 | int xch_disable; ///< whether the XCh extension should be decoded or not |
| 450 | |
| 451 | /* XXCH extension information */ |
| 452 | int xxch_chset; |
| 453 | int xxch_nbits_spk_mask; |
| 454 | uint32_t xxch_core_spkmask; |
| 455 | uint32_t xxch_spk_masks[4]; /* speaker masks, last element is core mask */ |
| 456 | int xxch_chset_nch[4]; |
| 457 | float xxch_dmix_sf[DCA_CHSETS_MAX]; |
| 458 | |
| 459 | uint32_t xxch_dmix_embedded; /* lower layer has mix pre-embedded, per chset */ |
| 460 | float xxch_dmix_coeff[DCA_PRIM_CHANNELS_MAX][32]; /* worst case sizing */ |
| 461 | |
| 462 | int8_t xxch_order_tab[32]; |
| 463 | int8_t lfe_index; |
| 464 | |
| 465 | /* ExSS header parser */ |
| 466 | int static_fields; ///< static fields present |
| 467 | int mix_metadata; ///< mixing metadata present |
| 468 | int num_mix_configs; ///< number of mix out configurations |
| 469 | int mix_config_num_ch[4]; ///< number of channels in each mix out configuration |
| 470 | |
| 471 | int profile; |
| 472 | |
| 473 | int debug_flag; ///< used for suppressing repeated error messages output |
| 474 | AVFloatDSPContext fdsp; |
| 475 | FFTContext imdct; |
| 476 | SynthFilterContext synth; |
| 477 | DCADSPContext dcadsp; |
| 478 | FmtConvertContext fmt_conv; |
| 479 | } DCAContext; |
| 480 | |
| 481 | static float dca_dmix_code(unsigned code); |
| 482 | |
| 483 | static const uint16_t dca_vlc_offs[] = { |
| 484 | 0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364, |
| 485 | 5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508, |
| 486 | 5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564, |
| 487 | 7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240, |
| 488 | 12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264, |
| 489 | 18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622, |
| 490 | }; |
| 491 | |
| 492 | static av_cold void dca_init_vlcs(void) |
| 493 | { |
| 494 | static int vlcs_initialized = 0; |
| 495 | int i, j, c = 14; |
| 496 | static VLC_TYPE dca_table[23622][2]; |
| 497 | |
| 498 | if (vlcs_initialized) |
| 499 | return; |
| 500 | |
| 501 | dca_bitalloc_index.offset = 1; |
| 502 | dca_bitalloc_index.wrap = 2; |
| 503 | for (i = 0; i < 5; i++) { |
| 504 | dca_bitalloc_index.vlc[i].table = &dca_table[dca_vlc_offs[i]]; |
| 505 | dca_bitalloc_index.vlc[i].table_allocated = dca_vlc_offs[i + 1] - dca_vlc_offs[i]; |
| 506 | init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12, |
| 507 | bitalloc_12_bits[i], 1, 1, |
| 508 | bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| 509 | } |
| 510 | dca_scalefactor.offset = -64; |
| 511 | dca_scalefactor.wrap = 2; |
| 512 | for (i = 0; i < 5; i++) { |
| 513 | dca_scalefactor.vlc[i].table = &dca_table[dca_vlc_offs[i + 5]]; |
| 514 | dca_scalefactor.vlc[i].table_allocated = dca_vlc_offs[i + 6] - dca_vlc_offs[i + 5]; |
| 515 | init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129, |
| 516 | scales_bits[i], 1, 1, |
| 517 | scales_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| 518 | } |
| 519 | dca_tmode.offset = 0; |
| 520 | dca_tmode.wrap = 1; |
| 521 | for (i = 0; i < 4; i++) { |
| 522 | dca_tmode.vlc[i].table = &dca_table[dca_vlc_offs[i + 10]]; |
| 523 | dca_tmode.vlc[i].table_allocated = dca_vlc_offs[i + 11] - dca_vlc_offs[i + 10]; |
| 524 | init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4, |
| 525 | tmode_bits[i], 1, 1, |
| 526 | tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| 527 | } |
| 528 | |
| 529 | for (i = 0; i < 10; i++) |
| 530 | for (j = 0; j < 7; j++) { |
| 531 | if (!bitalloc_codes[i][j]) |
| 532 | break; |
| 533 | dca_smpl_bitalloc[i + 1].offset = bitalloc_offsets[i]; |
| 534 | dca_smpl_bitalloc[i + 1].wrap = 1 + (j > 4); |
| 535 | dca_smpl_bitalloc[i + 1].vlc[j].table = &dca_table[dca_vlc_offs[c]]; |
| 536 | dca_smpl_bitalloc[i + 1].vlc[j].table_allocated = dca_vlc_offs[c + 1] - dca_vlc_offs[c]; |
| 537 | |
| 538 | init_vlc(&dca_smpl_bitalloc[i + 1].vlc[j], bitalloc_maxbits[i][j], |
| 539 | bitalloc_sizes[i], |
| 540 | bitalloc_bits[i][j], 1, 1, |
| 541 | bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC); |
| 542 | c++; |
| 543 | } |
| 544 | vlcs_initialized = 1; |
| 545 | } |
| 546 | |
| 547 | static inline void get_array(GetBitContext *gb, int *dst, int len, int bits) |
| 548 | { |
| 549 | while (len--) |
| 550 | *dst++ = get_bits(gb, bits); |
| 551 | } |
| 552 | |
| 553 | static inline int dca_xxch2index(DCAContext *s, int xxch_ch) |
| 554 | { |
| 555 | int i, base, mask; |
| 556 | |
| 557 | /* locate channel set containing the channel */ |
| 558 | for (i = -1, base = 0, mask = (s->xxch_core_spkmask & ~DCA_XXCH_LFE1); |
| 559 | i <= s->xxch_chset && !(mask & xxch_ch); mask = s->xxch_spk_masks[++i]) |
| 560 | base += av_popcount(mask); |
| 561 | |
| 562 | return base + av_popcount(mask & (xxch_ch - 1)); |
| 563 | } |
| 564 | |
| 565 | static int dca_parse_audio_coding_header(DCAContext *s, int base_channel, |
| 566 | int xxch) |
| 567 | { |
| 568 | int i, j; |
| 569 | static const float adj_table[4] = { 1.0, 1.1250, 1.2500, 1.4375 }; |
| 570 | static const int bitlen[11] = { 0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3 }; |
| 571 | static const int thr[11] = { 0, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7 }; |
| 572 | int hdr_pos = 0, hdr_size = 0; |
| 573 | float scale_factor; |
| 574 | int this_chans, acc_mask; |
| 575 | int embedded_downmix; |
| 576 | int nchans, mask[8]; |
| 577 | int coeff, ichan; |
| 578 | |
| 579 | /* xxch has arbitrary sized audio coding headers */ |
| 580 | if (xxch) { |
| 581 | hdr_pos = get_bits_count(&s->gb); |
| 582 | hdr_size = get_bits(&s->gb, 7) + 1; |
| 583 | } |
| 584 | |
| 585 | nchans = get_bits(&s->gb, 3) + 1; |
| 586 | s->total_channels = nchans + base_channel; |
| 587 | s->prim_channels = s->total_channels; |
| 588 | |
| 589 | /* obtain speaker layout mask & downmix coefficients for XXCH */ |
| 590 | if (xxch) { |
| 591 | acc_mask = s->xxch_core_spkmask; |
| 592 | |
| 593 | this_chans = get_bits(&s->gb, s->xxch_nbits_spk_mask - 6) << 6; |
| 594 | s->xxch_spk_masks[s->xxch_chset] = this_chans; |
| 595 | s->xxch_chset_nch[s->xxch_chset] = nchans; |
| 596 | |
| 597 | for (i = 0; i <= s->xxch_chset; i++) |
| 598 | acc_mask |= s->xxch_spk_masks[i]; |
| 599 | |
| 600 | /* check for downmixing information */ |
| 601 | if (get_bits1(&s->gb)) { |
| 602 | embedded_downmix = get_bits1(&s->gb); |
| 603 | coeff = get_bits(&s->gb, 6); |
| 604 | |
| 605 | if (coeff<1 || coeff>61) { |
| 606 | av_log(s->avctx, AV_LOG_ERROR, "6bit coeff %d is out of range\n", coeff); |
| 607 | return AVERROR_INVALIDDATA; |
| 608 | } |
| 609 | |
| 610 | scale_factor = -1.0f / dca_dmix_code((coeff<<2)-3); |
| 611 | |
| 612 | s->xxch_dmix_sf[s->xxch_chset] = scale_factor; |
| 613 | |
| 614 | for (i = base_channel; i < s->prim_channels; i++) { |
| 615 | mask[i] = get_bits(&s->gb, s->xxch_nbits_spk_mask); |
| 616 | } |
| 617 | |
| 618 | for (j = base_channel; j < s->prim_channels; j++) { |
| 619 | memset(s->xxch_dmix_coeff[j], 0, sizeof(s->xxch_dmix_coeff[0])); |
| 620 | s->xxch_dmix_embedded |= (embedded_downmix << j); |
| 621 | for (i = 0; i < s->xxch_nbits_spk_mask; i++) { |
| 622 | if (mask[j] & (1 << i)) { |
| 623 | if ((1 << i) == DCA_XXCH_LFE1) { |
| 624 | av_log(s->avctx, AV_LOG_WARNING, |
| 625 | "DCA-XXCH: dmix to LFE1 not supported.\n"); |
| 626 | continue; |
| 627 | } |
| 628 | |
| 629 | coeff = get_bits(&s->gb, 7); |
| 630 | ichan = dca_xxch2index(s, 1 << i); |
| 631 | if ((coeff&63)<1 || (coeff&63)>61) { |
| 632 | av_log(s->avctx, AV_LOG_ERROR, "7bit coeff %d is out of range\n", coeff); |
| 633 | return AVERROR_INVALIDDATA; |
| 634 | } |
| 635 | s->xxch_dmix_coeff[j][ichan] = dca_dmix_code((coeff<<2)-3); |
| 636 | } |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | } |
| 641 | |
| 642 | if (s->prim_channels > DCA_PRIM_CHANNELS_MAX) |
| 643 | s->prim_channels = DCA_PRIM_CHANNELS_MAX; |
| 644 | |
| 645 | |
| 646 | for (i = base_channel; i < s->prim_channels; i++) { |
| 647 | s->subband_activity[i] = get_bits(&s->gb, 5) + 2; |
| 648 | if (s->subband_activity[i] > DCA_SUBBANDS) |
| 649 | s->subband_activity[i] = DCA_SUBBANDS; |
| 650 | } |
| 651 | for (i = base_channel; i < s->prim_channels; i++) { |
| 652 | s->vq_start_subband[i] = get_bits(&s->gb, 5) + 1; |
| 653 | if (s->vq_start_subband[i] > DCA_SUBBANDS) |
| 654 | s->vq_start_subband[i] = DCA_SUBBANDS; |
| 655 | } |
| 656 | get_array(&s->gb, s->joint_intensity + base_channel, s->prim_channels - base_channel, 3); |
| 657 | get_array(&s->gb, s->transient_huffman + base_channel, s->prim_channels - base_channel, 2); |
| 658 | get_array(&s->gb, s->scalefactor_huffman + base_channel, s->prim_channels - base_channel, 3); |
| 659 | get_array(&s->gb, s->bitalloc_huffman + base_channel, s->prim_channels - base_channel, 3); |
| 660 | |
| 661 | /* Get codebooks quantization indexes */ |
| 662 | if (!base_channel) |
| 663 | memset(s->quant_index_huffman, 0, sizeof(s->quant_index_huffman)); |
| 664 | for (j = 1; j < 11; j++) |
| 665 | for (i = base_channel; i < s->prim_channels; i++) |
| 666 | s->quant_index_huffman[i][j] = get_bits(&s->gb, bitlen[j]); |
| 667 | |
| 668 | /* Get scale factor adjustment */ |
| 669 | for (j = 0; j < 11; j++) |
| 670 | for (i = base_channel; i < s->prim_channels; i++) |
| 671 | s->scalefactor_adj[i][j] = 1; |
| 672 | |
| 673 | for (j = 1; j < 11; j++) |
| 674 | for (i = base_channel; i < s->prim_channels; i++) |
| 675 | if (s->quant_index_huffman[i][j] < thr[j]) |
| 676 | s->scalefactor_adj[i][j] = adj_table[get_bits(&s->gb, 2)]; |
| 677 | |
| 678 | if (!xxch) { |
| 679 | if (s->crc_present) { |
| 680 | /* Audio header CRC check */ |
| 681 | get_bits(&s->gb, 16); |
| 682 | } |
| 683 | } else { |
| 684 | /* Skip to the end of the header, also ignore CRC if present */ |
| 685 | i = get_bits_count(&s->gb); |
| 686 | if (hdr_pos + 8 * hdr_size > i) |
| 687 | skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i); |
| 688 | } |
| 689 | |
| 690 | s->current_subframe = 0; |
| 691 | s->current_subsubframe = 0; |
| 692 | |
| 693 | #ifdef TRACE |
| 694 | av_log(s->avctx, AV_LOG_DEBUG, "subframes: %i\n", s->subframes); |
| 695 | av_log(s->avctx, AV_LOG_DEBUG, "prim channels: %i\n", s->prim_channels); |
| 696 | for (i = base_channel; i < s->prim_channels; i++) { |
| 697 | av_log(s->avctx, AV_LOG_DEBUG, "subband activity: %i\n", |
| 698 | s->subband_activity[i]); |
| 699 | av_log(s->avctx, AV_LOG_DEBUG, "vq start subband: %i\n", |
| 700 | s->vq_start_subband[i]); |
| 701 | av_log(s->avctx, AV_LOG_DEBUG, "joint intensity: %i\n", |
| 702 | s->joint_intensity[i]); |
| 703 | av_log(s->avctx, AV_LOG_DEBUG, "transient mode codebook: %i\n", |
| 704 | s->transient_huffman[i]); |
| 705 | av_log(s->avctx, AV_LOG_DEBUG, "scale factor codebook: %i\n", |
| 706 | s->scalefactor_huffman[i]); |
| 707 | av_log(s->avctx, AV_LOG_DEBUG, "bit allocation quantizer: %i\n", |
| 708 | s->bitalloc_huffman[i]); |
| 709 | av_log(s->avctx, AV_LOG_DEBUG, "quant index huff:"); |
| 710 | for (j = 0; j < 11; j++) |
| 711 | av_log(s->avctx, AV_LOG_DEBUG, " %i", s->quant_index_huffman[i][j]); |
| 712 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 713 | av_log(s->avctx, AV_LOG_DEBUG, "scalefac adj:"); |
| 714 | for (j = 0; j < 11; j++) |
| 715 | av_log(s->avctx, AV_LOG_DEBUG, " %1.3f", s->scalefactor_adj[i][j]); |
| 716 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 717 | } |
| 718 | #endif |
| 719 | |
| 720 | return 0; |
| 721 | } |
| 722 | |
| 723 | static int dca_parse_frame_header(DCAContext *s) |
| 724 | { |
| 725 | init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8); |
| 726 | |
| 727 | /* Sync code */ |
| 728 | skip_bits_long(&s->gb, 32); |
| 729 | |
| 730 | /* Frame header */ |
| 731 | s->frame_type = get_bits(&s->gb, 1); |
| 732 | s->samples_deficit = get_bits(&s->gb, 5) + 1; |
| 733 | s->crc_present = get_bits(&s->gb, 1); |
| 734 | s->sample_blocks = get_bits(&s->gb, 7) + 1; |
| 735 | s->frame_size = get_bits(&s->gb, 14) + 1; |
| 736 | if (s->frame_size < 95) |
| 737 | return AVERROR_INVALIDDATA; |
| 738 | s->amode = get_bits(&s->gb, 6); |
| 739 | s->sample_rate = avpriv_dca_sample_rates[get_bits(&s->gb, 4)]; |
| 740 | if (!s->sample_rate) |
| 741 | return AVERROR_INVALIDDATA; |
| 742 | s->bit_rate_index = get_bits(&s->gb, 5); |
| 743 | s->bit_rate = dca_bit_rates[s->bit_rate_index]; |
| 744 | if (!s->bit_rate) |
| 745 | return AVERROR_INVALIDDATA; |
| 746 | |
| 747 | skip_bits1(&s->gb); // always 0 (reserved, cf. ETSI TS 102 114 V1.4.1) |
| 748 | s->dynrange = get_bits(&s->gb, 1); |
| 749 | s->timestamp = get_bits(&s->gb, 1); |
| 750 | s->aux_data = get_bits(&s->gb, 1); |
| 751 | s->hdcd = get_bits(&s->gb, 1); |
| 752 | s->ext_descr = get_bits(&s->gb, 3); |
| 753 | s->ext_coding = get_bits(&s->gb, 1); |
| 754 | s->aspf = get_bits(&s->gb, 1); |
| 755 | s->lfe = get_bits(&s->gb, 2); |
| 756 | s->predictor_history = get_bits(&s->gb, 1); |
| 757 | |
| 758 | if (s->lfe > 2) { |
| 759 | s->lfe = 0; |
| 760 | av_log(s->avctx, AV_LOG_ERROR, "Invalid LFE value: %d\n", s->lfe); |
| 761 | return AVERROR_INVALIDDATA; |
| 762 | } |
| 763 | |
| 764 | /* TODO: check CRC */ |
| 765 | if (s->crc_present) |
| 766 | s->header_crc = get_bits(&s->gb, 16); |
| 767 | |
| 768 | s->multirate_inter = get_bits(&s->gb, 1); |
| 769 | s->version = get_bits(&s->gb, 4); |
| 770 | s->copy_history = get_bits(&s->gb, 2); |
| 771 | s->source_pcm_res = get_bits(&s->gb, 3); |
| 772 | s->front_sum = get_bits(&s->gb, 1); |
| 773 | s->surround_sum = get_bits(&s->gb, 1); |
| 774 | s->dialog_norm = get_bits(&s->gb, 4); |
| 775 | |
| 776 | /* FIXME: channels mixing levels */ |
| 777 | s->output = s->amode; |
| 778 | if (s->lfe) |
| 779 | s->output |= DCA_LFE; |
| 780 | |
| 781 | #ifdef TRACE |
| 782 | av_log(s->avctx, AV_LOG_DEBUG, "frame type: %i\n", s->frame_type); |
| 783 | av_log(s->avctx, AV_LOG_DEBUG, "samples deficit: %i\n", s->samples_deficit); |
| 784 | av_log(s->avctx, AV_LOG_DEBUG, "crc present: %i\n", s->crc_present); |
| 785 | av_log(s->avctx, AV_LOG_DEBUG, "sample blocks: %i (%i samples)\n", |
| 786 | s->sample_blocks, s->sample_blocks * 32); |
| 787 | av_log(s->avctx, AV_LOG_DEBUG, "frame size: %i bytes\n", s->frame_size); |
| 788 | av_log(s->avctx, AV_LOG_DEBUG, "amode: %i (%i channels)\n", |
| 789 | s->amode, dca_channels[s->amode]); |
| 790 | av_log(s->avctx, AV_LOG_DEBUG, "sample rate: %i Hz\n", |
| 791 | s->sample_rate); |
| 792 | av_log(s->avctx, AV_LOG_DEBUG, "bit rate: %i bits/s\n", |
| 793 | s->bit_rate); |
| 794 | av_log(s->avctx, AV_LOG_DEBUG, "dynrange: %i\n", s->dynrange); |
| 795 | av_log(s->avctx, AV_LOG_DEBUG, "timestamp: %i\n", s->timestamp); |
| 796 | av_log(s->avctx, AV_LOG_DEBUG, "aux_data: %i\n", s->aux_data); |
| 797 | av_log(s->avctx, AV_LOG_DEBUG, "hdcd: %i\n", s->hdcd); |
| 798 | av_log(s->avctx, AV_LOG_DEBUG, "ext descr: %i\n", s->ext_descr); |
| 799 | av_log(s->avctx, AV_LOG_DEBUG, "ext coding: %i\n", s->ext_coding); |
| 800 | av_log(s->avctx, AV_LOG_DEBUG, "aspf: %i\n", s->aspf); |
| 801 | av_log(s->avctx, AV_LOG_DEBUG, "lfe: %i\n", s->lfe); |
| 802 | av_log(s->avctx, AV_LOG_DEBUG, "predictor history: %i\n", |
| 803 | s->predictor_history); |
| 804 | av_log(s->avctx, AV_LOG_DEBUG, "header crc: %i\n", s->header_crc); |
| 805 | av_log(s->avctx, AV_LOG_DEBUG, "multirate inter: %i\n", |
| 806 | s->multirate_inter); |
| 807 | av_log(s->avctx, AV_LOG_DEBUG, "version number: %i\n", s->version); |
| 808 | av_log(s->avctx, AV_LOG_DEBUG, "copy history: %i\n", s->copy_history); |
| 809 | av_log(s->avctx, AV_LOG_DEBUG, |
| 810 | "source pcm resolution: %i (%i bits/sample)\n", |
| 811 | s->source_pcm_res, dca_bits_per_sample[s->source_pcm_res]); |
| 812 | av_log(s->avctx, AV_LOG_DEBUG, "front sum: %i\n", s->front_sum); |
| 813 | av_log(s->avctx, AV_LOG_DEBUG, "surround sum: %i\n", s->surround_sum); |
| 814 | av_log(s->avctx, AV_LOG_DEBUG, "dialog norm: %i\n", s->dialog_norm); |
| 815 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 816 | #endif |
| 817 | |
| 818 | /* Primary audio coding header */ |
| 819 | s->subframes = get_bits(&s->gb, 4) + 1; |
| 820 | |
| 821 | return dca_parse_audio_coding_header(s, 0, 0); |
| 822 | } |
| 823 | |
| 824 | |
| 825 | static inline int get_scale(GetBitContext *gb, int level, int value, int log2range) |
| 826 | { |
| 827 | if (level < 5) { |
| 828 | /* huffman encoded */ |
| 829 | value += get_bitalloc(gb, &dca_scalefactor, level); |
| 830 | value = av_clip(value, 0, (1 << log2range) - 1); |
| 831 | } else if (level < 8) { |
| 832 | if (level + 1 > log2range) { |
| 833 | skip_bits(gb, level + 1 - log2range); |
| 834 | value = get_bits(gb, log2range); |
| 835 | } else { |
| 836 | value = get_bits(gb, level + 1); |
| 837 | } |
| 838 | } |
| 839 | return value; |
| 840 | } |
| 841 | |
| 842 | static int dca_subframe_header(DCAContext *s, int base_channel, int block_index) |
| 843 | { |
| 844 | /* Primary audio coding side information */ |
| 845 | int j, k; |
| 846 | |
| 847 | if (get_bits_left(&s->gb) < 0) |
| 848 | return AVERROR_INVALIDDATA; |
| 849 | |
| 850 | if (!base_channel) { |
| 851 | s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1; |
| 852 | s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3); |
| 853 | } |
| 854 | |
| 855 | for (j = base_channel; j < s->prim_channels; j++) { |
| 856 | for (k = 0; k < s->subband_activity[j]; k++) |
| 857 | s->prediction_mode[j][k] = get_bits(&s->gb, 1); |
| 858 | } |
| 859 | |
| 860 | /* Get prediction codebook */ |
| 861 | for (j = base_channel; j < s->prim_channels; j++) { |
| 862 | for (k = 0; k < s->subband_activity[j]; k++) { |
| 863 | if (s->prediction_mode[j][k] > 0) { |
| 864 | /* (Prediction coefficient VQ address) */ |
| 865 | s->prediction_vq[j][k] = get_bits(&s->gb, 12); |
| 866 | } |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | /* Bit allocation index */ |
| 871 | for (j = base_channel; j < s->prim_channels; j++) { |
| 872 | for (k = 0; k < s->vq_start_subband[j]; k++) { |
| 873 | if (s->bitalloc_huffman[j] == 6) |
| 874 | s->bitalloc[j][k] = get_bits(&s->gb, 5); |
| 875 | else if (s->bitalloc_huffman[j] == 5) |
| 876 | s->bitalloc[j][k] = get_bits(&s->gb, 4); |
| 877 | else if (s->bitalloc_huffman[j] == 7) { |
| 878 | av_log(s->avctx, AV_LOG_ERROR, |
| 879 | "Invalid bit allocation index\n"); |
| 880 | return AVERROR_INVALIDDATA; |
| 881 | } else { |
| 882 | s->bitalloc[j][k] = |
| 883 | get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]); |
| 884 | } |
| 885 | |
| 886 | if (s->bitalloc[j][k] > 26) { |
| 887 | av_dlog(s->avctx, "bitalloc index [%i][%i] too big (%i)\n", |
| 888 | j, k, s->bitalloc[j][k]); |
| 889 | return AVERROR_INVALIDDATA; |
| 890 | } |
| 891 | } |
| 892 | } |
| 893 | |
| 894 | /* Transition mode */ |
| 895 | for (j = base_channel; j < s->prim_channels; j++) { |
| 896 | for (k = 0; k < s->subband_activity[j]; k++) { |
| 897 | s->transition_mode[j][k] = 0; |
| 898 | if (s->subsubframes[s->current_subframe] > 1 && |
| 899 | k < s->vq_start_subband[j] && s->bitalloc[j][k] > 0) { |
| 900 | s->transition_mode[j][k] = |
| 901 | get_bitalloc(&s->gb, &dca_tmode, s->transient_huffman[j]); |
| 902 | } |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | if (get_bits_left(&s->gb) < 0) |
| 907 | return AVERROR_INVALIDDATA; |
| 908 | |
| 909 | for (j = base_channel; j < s->prim_channels; j++) { |
| 910 | const uint32_t *scale_table; |
| 911 | int scale_sum, log_size; |
| 912 | |
| 913 | memset(s->scale_factor[j], 0, |
| 914 | s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2); |
| 915 | |
| 916 | if (s->scalefactor_huffman[j] == 6) { |
| 917 | scale_table = scale_factor_quant7; |
| 918 | log_size = 7; |
| 919 | } else { |
| 920 | scale_table = scale_factor_quant6; |
| 921 | log_size = 6; |
| 922 | } |
| 923 | |
| 924 | /* When huffman coded, only the difference is encoded */ |
| 925 | scale_sum = 0; |
| 926 | |
| 927 | for (k = 0; k < s->subband_activity[j]; k++) { |
| 928 | if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) { |
| 929 | scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); |
| 930 | s->scale_factor[j][k][0] = scale_table[scale_sum]; |
| 931 | } |
| 932 | |
| 933 | if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) { |
| 934 | /* Get second scale factor */ |
| 935 | scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size); |
| 936 | s->scale_factor[j][k][1] = scale_table[scale_sum]; |
| 937 | } |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | /* Joint subband scale factor codebook select */ |
| 942 | for (j = base_channel; j < s->prim_channels; j++) { |
| 943 | /* Transmitted only if joint subband coding enabled */ |
| 944 | if (s->joint_intensity[j] > 0) |
| 945 | s->joint_huff[j] = get_bits(&s->gb, 3); |
| 946 | } |
| 947 | |
| 948 | if (get_bits_left(&s->gb) < 0) |
| 949 | return AVERROR_INVALIDDATA; |
| 950 | |
| 951 | /* Scale factors for joint subband coding */ |
| 952 | for (j = base_channel; j < s->prim_channels; j++) { |
| 953 | int source_channel; |
| 954 | |
| 955 | /* Transmitted only if joint subband coding enabled */ |
| 956 | if (s->joint_intensity[j] > 0) { |
| 957 | int scale = 0; |
| 958 | source_channel = s->joint_intensity[j] - 1; |
| 959 | |
| 960 | /* When huffman coded, only the difference is encoded |
| 961 | * (is this valid as well for joint scales ???) */ |
| 962 | |
| 963 | for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) { |
| 964 | scale = get_scale(&s->gb, s->joint_huff[j], 64 /* bias */, 7); |
| 965 | s->joint_scale_factor[j][k] = scale; /*joint_scale_table[scale]; */ |
| 966 | } |
| 967 | |
| 968 | if (!(s->debug_flag & 0x02)) { |
| 969 | av_log(s->avctx, AV_LOG_DEBUG, |
| 970 | "Joint stereo coding not supported\n"); |
| 971 | s->debug_flag |= 0x02; |
| 972 | } |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /* Dynamic range coefficient */ |
| 977 | if (!base_channel && s->dynrange) |
| 978 | s->dynrange_coef = get_bits(&s->gb, 8); |
| 979 | |
| 980 | /* Side information CRC check word */ |
| 981 | if (s->crc_present) { |
| 982 | get_bits(&s->gb, 16); |
| 983 | } |
| 984 | |
| 985 | /* |
| 986 | * Primary audio data arrays |
| 987 | */ |
| 988 | |
| 989 | /* VQ encoded high frequency subbands */ |
| 990 | for (j = base_channel; j < s->prim_channels; j++) |
| 991 | for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) |
| 992 | /* 1 vector -> 32 samples */ |
| 993 | s->high_freq_vq[j][k] = get_bits(&s->gb, 10); |
| 994 | |
| 995 | /* Low frequency effect data */ |
| 996 | if (!base_channel && s->lfe) { |
| 997 | int quant7; |
| 998 | /* LFE samples */ |
| 999 | int lfe_samples = 2 * s->lfe * (4 + block_index); |
| 1000 | int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); |
| 1001 | float lfe_scale; |
| 1002 | |
| 1003 | for (j = lfe_samples; j < lfe_end_sample; j++) { |
| 1004 | /* Signed 8 bits int */ |
| 1005 | s->lfe_data[j] = get_sbits(&s->gb, 8); |
| 1006 | } |
| 1007 | |
| 1008 | /* Scale factor index */ |
| 1009 | quant7 = get_bits(&s->gb, 8); |
| 1010 | if (quant7 > 127) { |
| 1011 | avpriv_request_sample(s->avctx, "LFEScaleIndex larger than 127"); |
| 1012 | return AVERROR_INVALIDDATA; |
| 1013 | } |
| 1014 | s->lfe_scale_factor = scale_factor_quant7[quant7]; |
| 1015 | |
| 1016 | /* Quantization step size * scale factor */ |
| 1017 | lfe_scale = 0.035 * s->lfe_scale_factor; |
| 1018 | |
| 1019 | for (j = lfe_samples; j < lfe_end_sample; j++) |
| 1020 | s->lfe_data[j] *= lfe_scale; |
| 1021 | } |
| 1022 | |
| 1023 | #ifdef TRACE |
| 1024 | av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n", |
| 1025 | s->subsubframes[s->current_subframe]); |
| 1026 | av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n", |
| 1027 | s->partial_samples[s->current_subframe]); |
| 1028 | |
| 1029 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1030 | av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:"); |
| 1031 | for (k = 0; k < s->subband_activity[j]; k++) |
| 1032 | av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]); |
| 1033 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1034 | } |
| 1035 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1036 | for (k = 0; k < s->subband_activity[j]; k++) |
| 1037 | av_log(s->avctx, AV_LOG_DEBUG, |
| 1038 | "prediction coefs: %f, %f, %f, %f\n", |
| 1039 | (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192, |
| 1040 | (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192, |
| 1041 | (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192, |
| 1042 | (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192); |
| 1043 | } |
| 1044 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1045 | av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: "); |
| 1046 | for (k = 0; k < s->vq_start_subband[j]; k++) |
| 1047 | av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]); |
| 1048 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1049 | } |
| 1050 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1051 | av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:"); |
| 1052 | for (k = 0; k < s->subband_activity[j]; k++) |
| 1053 | av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]); |
| 1054 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1055 | } |
| 1056 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1057 | av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:"); |
| 1058 | for (k = 0; k < s->subband_activity[j]; k++) { |
| 1059 | if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) |
| 1060 | av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]); |
| 1061 | if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) |
| 1062 | av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]); |
| 1063 | } |
| 1064 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1065 | } |
| 1066 | for (j = base_channel; j < s->prim_channels; j++) { |
| 1067 | if (s->joint_intensity[j] > 0) { |
| 1068 | int source_channel = s->joint_intensity[j] - 1; |
| 1069 | av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n"); |
| 1070 | for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) |
| 1071 | av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]); |
| 1072 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1073 | } |
| 1074 | } |
| 1075 | for (j = base_channel; j < s->prim_channels; j++) |
| 1076 | for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++) |
| 1077 | av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]); |
| 1078 | if (!base_channel && s->lfe) { |
| 1079 | int lfe_samples = 2 * s->lfe * (4 + block_index); |
| 1080 | int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]); |
| 1081 | |
| 1082 | av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n"); |
| 1083 | for (j = lfe_samples; j < lfe_end_sample; j++) |
| 1084 | av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]); |
| 1085 | av_log(s->avctx, AV_LOG_DEBUG, "\n"); |
| 1086 | } |
| 1087 | #endif |
| 1088 | |
| 1089 | return 0; |
| 1090 | } |
| 1091 | |
| 1092 | static void qmf_32_subbands(DCAContext *s, int chans, |
| 1093 | float samples_in[32][8], float *samples_out, |
| 1094 | float scale) |
| 1095 | { |
| 1096 | const float *prCoeff; |
| 1097 | |
| 1098 | int sb_act = s->subband_activity[chans]; |
| 1099 | |
| 1100 | scale *= sqrt(1 / 8.0); |
| 1101 | |
| 1102 | /* Select filter */ |
| 1103 | if (!s->multirate_inter) /* Non-perfect reconstruction */ |
| 1104 | prCoeff = fir_32bands_nonperfect; |
| 1105 | else /* Perfect reconstruction */ |
| 1106 | prCoeff = fir_32bands_perfect; |
| 1107 | |
| 1108 | s->dcadsp.qmf_32_subbands(samples_in, sb_act, &s->synth, &s->imdct, |
| 1109 | s->subband_fir_hist[chans], |
| 1110 | &s->hist_index[chans], |
| 1111 | s->subband_fir_noidea[chans], prCoeff, |
| 1112 | samples_out, s->raXin, scale); |
| 1113 | } |
| 1114 | |
| 1115 | static void lfe_interpolation_fir(DCAContext *s, int decimation_select, |
| 1116 | int num_deci_sample, float *samples_in, |
| 1117 | float *samples_out) |
| 1118 | { |
| 1119 | /* samples_in: An array holding decimated samples. |
| 1120 | * Samples in current subframe starts from samples_in[0], |
| 1121 | * while samples_in[-1], samples_in[-2], ..., stores samples |
| 1122 | * from last subframe as history. |
| 1123 | * |
| 1124 | * samples_out: An array holding interpolated samples |
| 1125 | */ |
| 1126 | |
| 1127 | int idx; |
| 1128 | const float *prCoeff; |
| 1129 | int deciindex; |
| 1130 | |
| 1131 | /* Select decimation filter */ |
| 1132 | if (decimation_select == 1) { |
| 1133 | idx = 1; |
| 1134 | prCoeff = lfe_fir_128; |
| 1135 | } else { |
| 1136 | idx = 0; |
| 1137 | prCoeff = lfe_fir_64; |
| 1138 | } |
| 1139 | /* Interpolation */ |
| 1140 | for (deciindex = 0; deciindex < num_deci_sample; deciindex++) { |
| 1141 | s->dcadsp.lfe_fir[idx](samples_out, samples_in, prCoeff); |
| 1142 | samples_in++; |
| 1143 | samples_out += 2 * 32 * (1 + idx); |
| 1144 | } |
| 1145 | } |
| 1146 | |
| 1147 | /* downmixing routines */ |
| 1148 | #define MIX_REAR1(samples, s1, rs, coef) \ |
| 1149 | samples[0][i] += samples[s1][i] * coef[rs][0]; \ |
| 1150 | samples[1][i] += samples[s1][i] * coef[rs][1]; |
| 1151 | |
| 1152 | #define MIX_REAR2(samples, s1, s2, rs, coef) \ |
| 1153 | samples[0][i] += samples[s1][i] * coef[rs][0] + samples[s2][i] * coef[rs + 1][0]; \ |
| 1154 | samples[1][i] += samples[s1][i] * coef[rs][1] + samples[s2][i] * coef[rs + 1][1]; |
| 1155 | |
| 1156 | #define MIX_FRONT3(samples, coef) \ |
| 1157 | t = samples[c][i]; \ |
| 1158 | u = samples[l][i]; \ |
| 1159 | v = samples[r][i]; \ |
| 1160 | samples[0][i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \ |
| 1161 | samples[1][i] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1]; |
| 1162 | |
| 1163 | #define DOWNMIX_TO_STEREO(op1, op2) \ |
| 1164 | for (i = 0; i < 256; i++) { \ |
| 1165 | op1 \ |
| 1166 | op2 \ |
| 1167 | } |
| 1168 | |
| 1169 | static void dca_downmix(float **samples, int srcfmt, int lfe_present, |
| 1170 | float coef[DCA_PRIM_CHANNELS_MAX + 1][2], |
| 1171 | const int8_t *channel_mapping) |
| 1172 | { |
| 1173 | int c, l, r, sl, sr, s; |
| 1174 | int i; |
| 1175 | float t, u, v; |
| 1176 | |
| 1177 | switch (srcfmt) { |
| 1178 | case DCA_MONO: |
| 1179 | case DCA_4F2R: |
| 1180 | av_log(NULL, AV_LOG_ERROR, "Not implemented!\n"); |
| 1181 | break; |
| 1182 | case DCA_CHANNEL: |
| 1183 | case DCA_STEREO: |
| 1184 | case DCA_STEREO_TOTAL: |
| 1185 | case DCA_STEREO_SUMDIFF: |
| 1186 | break; |
| 1187 | case DCA_3F: |
| 1188 | c = channel_mapping[0]; |
| 1189 | l = channel_mapping[1]; |
| 1190 | r = channel_mapping[2]; |
| 1191 | DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), ); |
| 1192 | break; |
| 1193 | case DCA_2F1R: |
| 1194 | s = channel_mapping[2]; |
| 1195 | DOWNMIX_TO_STEREO(MIX_REAR1(samples, s, 2, coef), ); |
| 1196 | break; |
| 1197 | case DCA_3F1R: |
| 1198 | c = channel_mapping[0]; |
| 1199 | l = channel_mapping[1]; |
| 1200 | r = channel_mapping[2]; |
| 1201 | s = channel_mapping[3]; |
| 1202 | DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), |
| 1203 | MIX_REAR1(samples, s, 3, coef)); |
| 1204 | break; |
| 1205 | case DCA_2F2R: |
| 1206 | sl = channel_mapping[2]; |
| 1207 | sr = channel_mapping[3]; |
| 1208 | DOWNMIX_TO_STEREO(MIX_REAR2(samples, sl, sr, 2, coef), ); |
| 1209 | break; |
| 1210 | case DCA_3F2R: |
| 1211 | c = channel_mapping[0]; |
| 1212 | l = channel_mapping[1]; |
| 1213 | r = channel_mapping[2]; |
| 1214 | sl = channel_mapping[3]; |
| 1215 | sr = channel_mapping[4]; |
| 1216 | DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), |
| 1217 | MIX_REAR2(samples, sl, sr, 3, coef)); |
| 1218 | break; |
| 1219 | } |
| 1220 | if (lfe_present) { |
| 1221 | int lf_buf = dca_lfe_index[srcfmt]; |
| 1222 | int lf_idx = dca_channels [srcfmt]; |
| 1223 | for (i = 0; i < 256; i++) { |
| 1224 | samples[0][i] += samples[lf_buf][i] * coef[lf_idx][0]; |
| 1225 | samples[1][i] += samples[lf_buf][i] * coef[lf_idx][1]; |
| 1226 | } |
| 1227 | } |
| 1228 | } |
| 1229 | |
| 1230 | |
| 1231 | #ifndef decode_blockcodes |
| 1232 | /* Very compact version of the block code decoder that does not use table |
| 1233 | * look-up but is slightly slower */ |
| 1234 | static int decode_blockcode(int code, int levels, int32_t *values) |
| 1235 | { |
| 1236 | int i; |
| 1237 | int offset = (levels - 1) >> 1; |
| 1238 | |
| 1239 | for (i = 0; i < 4; i++) { |
| 1240 | int div = FASTDIV(code, levels); |
| 1241 | values[i] = code - offset - div * levels; |
| 1242 | code = div; |
| 1243 | } |
| 1244 | |
| 1245 | return code; |
| 1246 | } |
| 1247 | |
| 1248 | static int decode_blockcodes(int code1, int code2, int levels, int32_t *values) |
| 1249 | { |
| 1250 | return decode_blockcode(code1, levels, values) | |
| 1251 | decode_blockcode(code2, levels, values + 4); |
| 1252 | } |
| 1253 | #endif |
| 1254 | |
| 1255 | static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 }; |
| 1256 | static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 }; |
| 1257 | |
| 1258 | static int dca_subsubframe(DCAContext *s, int base_channel, int block_index) |
| 1259 | { |
| 1260 | int k, l; |
| 1261 | int subsubframe = s->current_subsubframe; |
| 1262 | |
| 1263 | const float *quant_step_table; |
| 1264 | |
| 1265 | /* FIXME */ |
| 1266 | float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; |
| 1267 | LOCAL_ALIGNED_16(int32_t, block, [8 * DCA_SUBBANDS]); |
| 1268 | |
| 1269 | /* |
| 1270 | * Audio data |
| 1271 | */ |
| 1272 | |
| 1273 | /* Select quantization step size table */ |
| 1274 | if (s->bit_rate_index == 0x1f) |
| 1275 | quant_step_table = lossless_quant_d; |
| 1276 | else |
| 1277 | quant_step_table = lossy_quant_d; |
| 1278 | |
| 1279 | for (k = base_channel; k < s->prim_channels; k++) { |
| 1280 | float rscale[DCA_SUBBANDS]; |
| 1281 | |
| 1282 | if (get_bits_left(&s->gb) < 0) |
| 1283 | return AVERROR_INVALIDDATA; |
| 1284 | |
| 1285 | for (l = 0; l < s->vq_start_subband[k]; l++) { |
| 1286 | int m; |
| 1287 | |
| 1288 | /* Select the mid-tread linear quantizer */ |
| 1289 | int abits = s->bitalloc[k][l]; |
| 1290 | |
| 1291 | float quant_step_size = quant_step_table[abits]; |
| 1292 | |
| 1293 | /* |
| 1294 | * Determine quantization index code book and its type |
| 1295 | */ |
| 1296 | |
| 1297 | /* Select quantization index code book */ |
| 1298 | int sel = s->quant_index_huffman[k][abits]; |
| 1299 | |
| 1300 | /* |
| 1301 | * Extract bits from the bit stream |
| 1302 | */ |
| 1303 | if (!abits) { |
| 1304 | rscale[l] = 0; |
| 1305 | memset(block + 8 * l, 0, 8 * sizeof(block[0])); |
| 1306 | } else { |
| 1307 | /* Deal with transients */ |
| 1308 | int sfi = s->transition_mode[k][l] && subsubframe >= s->transition_mode[k][l]; |
| 1309 | rscale[l] = quant_step_size * s->scale_factor[k][l][sfi] * |
| 1310 | s->scalefactor_adj[k][sel]; |
| 1311 | |
| 1312 | if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table) { |
| 1313 | if (abits <= 7) { |
| 1314 | /* Block code */ |
| 1315 | int block_code1, block_code2, size, levels, err; |
| 1316 | |
| 1317 | size = abits_sizes[abits - 1]; |
| 1318 | levels = abits_levels[abits - 1]; |
| 1319 | |
| 1320 | block_code1 = get_bits(&s->gb, size); |
| 1321 | block_code2 = get_bits(&s->gb, size); |
| 1322 | err = decode_blockcodes(block_code1, block_code2, |
| 1323 | levels, block + 8 * l); |
| 1324 | if (err) { |
| 1325 | av_log(s->avctx, AV_LOG_ERROR, |
| 1326 | "ERROR: block code look-up failed\n"); |
| 1327 | return AVERROR_INVALIDDATA; |
| 1328 | } |
| 1329 | } else { |
| 1330 | /* no coding */ |
| 1331 | for (m = 0; m < 8; m++) |
| 1332 | block[8 * l + m] = get_sbits(&s->gb, abits - 3); |
| 1333 | } |
| 1334 | } else { |
| 1335 | /* Huffman coded */ |
| 1336 | for (m = 0; m < 8; m++) |
| 1337 | block[8 * l + m] = get_bitalloc(&s->gb, |
| 1338 | &dca_smpl_bitalloc[abits], sel); |
| 1339 | } |
| 1340 | |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | s->fmt_conv.int32_to_float_fmul_array8(&s->fmt_conv, subband_samples[k][0], |
| 1345 | block, rscale, 8 * s->vq_start_subband[k]); |
| 1346 | |
| 1347 | for (l = 0; l < s->vq_start_subband[k]; l++) { |
| 1348 | int m; |
| 1349 | /* |
| 1350 | * Inverse ADPCM if in prediction mode |
| 1351 | */ |
| 1352 | if (s->prediction_mode[k][l]) { |
| 1353 | int n; |
| 1354 | if (s->predictor_history) |
| 1355 | subband_samples[k][l][0] += (adpcm_vb[s->prediction_vq[k][l]][0] * |
| 1356 | s->subband_samples_hist[k][l][3] + |
| 1357 | adpcm_vb[s->prediction_vq[k][l]][1] * |
| 1358 | s->subband_samples_hist[k][l][2] + |
| 1359 | adpcm_vb[s->prediction_vq[k][l]][2] * |
| 1360 | s->subband_samples_hist[k][l][1] + |
| 1361 | adpcm_vb[s->prediction_vq[k][l]][3] * |
| 1362 | s->subband_samples_hist[k][l][0]) * |
| 1363 | (1.0f / 8192); |
| 1364 | for (m = 1; m < 8; m++) { |
| 1365 | float sum = adpcm_vb[s->prediction_vq[k][l]][0] * |
| 1366 | subband_samples[k][l][m - 1]; |
| 1367 | for (n = 2; n <= 4; n++) |
| 1368 | if (m >= n) |
| 1369 | sum += adpcm_vb[s->prediction_vq[k][l]][n - 1] * |
| 1370 | subband_samples[k][l][m - n]; |
| 1371 | else if (s->predictor_history) |
| 1372 | sum += adpcm_vb[s->prediction_vq[k][l]][n - 1] * |
| 1373 | s->subband_samples_hist[k][l][m - n + 4]; |
| 1374 | subband_samples[k][l][m] += sum * (1.0f / 8192); |
| 1375 | } |
| 1376 | } |
| 1377 | } |
| 1378 | |
| 1379 | /* |
| 1380 | * Decode VQ encoded high frequencies |
| 1381 | */ |
| 1382 | if (s->subband_activity[k] > s->vq_start_subband[k]) { |
| 1383 | if (!(s->debug_flag & 0x01)) { |
| 1384 | av_log(s->avctx, AV_LOG_DEBUG, |
| 1385 | "Stream with high frequencies VQ coding\n"); |
| 1386 | s->debug_flag |= 0x01; |
| 1387 | } |
| 1388 | s->dcadsp.decode_hf(subband_samples[k], s->high_freq_vq[k], |
| 1389 | high_freq_vq, subsubframe * 8, |
| 1390 | s->scale_factor[k], s->vq_start_subband[k], |
| 1391 | s->subband_activity[k]); |
| 1392 | } |
| 1393 | } |
| 1394 | |
| 1395 | /* Check for DSYNC after subsubframe */ |
| 1396 | if (s->aspf || subsubframe == s->subsubframes[s->current_subframe] - 1) { |
| 1397 | if (0xFFFF == get_bits(&s->gb, 16)) { /* 0xFFFF */ |
| 1398 | #ifdef TRACE |
| 1399 | av_log(s->avctx, AV_LOG_DEBUG, "Got subframe DSYNC\n"); |
| 1400 | #endif |
| 1401 | } else { |
| 1402 | av_log(s->avctx, AV_LOG_ERROR, "Didn't get subframe DSYNC\n"); |
| 1403 | return AVERROR_INVALIDDATA; |
| 1404 | } |
| 1405 | } |
| 1406 | |
| 1407 | /* Backup predictor history for adpcm */ |
| 1408 | for (k = base_channel; k < s->prim_channels; k++) |
| 1409 | for (l = 0; l < s->vq_start_subband[k]; l++) |
| 1410 | AV_COPY128(s->subband_samples_hist[k][l], &subband_samples[k][l][4]); |
| 1411 | |
| 1412 | return 0; |
| 1413 | } |
| 1414 | |
| 1415 | static int dca_filter_channels(DCAContext *s, int block_index) |
| 1416 | { |
| 1417 | float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index]; |
| 1418 | int k; |
| 1419 | |
| 1420 | /* 32 subbands QMF */ |
| 1421 | for (k = 0; k < s->prim_channels; k++) { |
| 1422 | /* static float pcm_to_double[8] = { 32768.0, 32768.0, 524288.0, 524288.0, |
| 1423 | 0, 8388608.0, 8388608.0 };*/ |
| 1424 | if (s->channel_order_tab[k] >= 0) |
| 1425 | qmf_32_subbands(s, k, subband_samples[k], |
| 1426 | s->samples_chanptr[s->channel_order_tab[k]], |
| 1427 | M_SQRT1_2 / 32768.0 /* pcm_to_double[s->source_pcm_res] */); |
| 1428 | } |
| 1429 | |
| 1430 | /* Generate LFE samples for this subsubframe FIXME!!! */ |
| 1431 | if (s->lfe) { |
| 1432 | lfe_interpolation_fir(s, s->lfe, 2 * s->lfe, |
| 1433 | s->lfe_data + 2 * s->lfe * (block_index + 4), |
| 1434 | s->samples_chanptr[s->lfe_index]); |
| 1435 | /* Outputs 20bits pcm samples */ |
| 1436 | } |
| 1437 | |
| 1438 | /* Downmixing to Stereo */ |
| 1439 | if (s->prim_channels + !!s->lfe > 2 && |
| 1440 | s->avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| 1441 | dca_downmix(s->samples_chanptr, s->amode, !!s->lfe, s->downmix_coef, |
| 1442 | s->channel_order_tab); |
| 1443 | } |
| 1444 | |
| 1445 | return 0; |
| 1446 | } |
| 1447 | |
| 1448 | |
| 1449 | static int dca_subframe_footer(DCAContext *s, int base_channel) |
| 1450 | { |
| 1451 | int in, out, aux_data_count, aux_data_end, reserved; |
| 1452 | uint32_t nsyncaux; |
| 1453 | |
| 1454 | /* |
| 1455 | * Unpack optional information |
| 1456 | */ |
| 1457 | |
| 1458 | /* presumably optional information only appears in the core? */ |
| 1459 | if (!base_channel) { |
| 1460 | if (s->timestamp) |
| 1461 | skip_bits_long(&s->gb, 32); |
| 1462 | |
| 1463 | if (s->aux_data) { |
| 1464 | aux_data_count = get_bits(&s->gb, 6); |
| 1465 | |
| 1466 | // align (32-bit) |
| 1467 | skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| 1468 | |
| 1469 | aux_data_end = 8 * aux_data_count + get_bits_count(&s->gb); |
| 1470 | |
| 1471 | if ((nsyncaux = get_bits_long(&s->gb, 32)) != DCA_NSYNCAUX) { |
| 1472 | av_log(s->avctx, AV_LOG_ERROR, "nSYNCAUX mismatch %#"PRIx32"\n", |
| 1473 | nsyncaux); |
| 1474 | return AVERROR_INVALIDDATA; |
| 1475 | } |
| 1476 | |
| 1477 | if (get_bits1(&s->gb)) { // bAUXTimeStampFlag |
| 1478 | avpriv_request_sample(s->avctx, |
| 1479 | "Auxiliary Decode Time Stamp Flag"); |
| 1480 | // align (4-bit) |
| 1481 | skip_bits(&s->gb, (-get_bits_count(&s->gb)) & 4); |
| 1482 | // 44 bits: nMSByte (8), nMarker (4), nLSByte (28), nMarker (4) |
| 1483 | skip_bits_long(&s->gb, 44); |
| 1484 | } |
| 1485 | |
| 1486 | if ((s->core_downmix = get_bits1(&s->gb))) { |
| 1487 | int am = get_bits(&s->gb, 3); |
| 1488 | switch (am) { |
| 1489 | case 0: |
| 1490 | s->core_downmix_amode = DCA_MONO; |
| 1491 | break; |
| 1492 | case 1: |
| 1493 | s->core_downmix_amode = DCA_STEREO; |
| 1494 | break; |
| 1495 | case 2: |
| 1496 | s->core_downmix_amode = DCA_STEREO_TOTAL; |
| 1497 | break; |
| 1498 | case 3: |
| 1499 | s->core_downmix_amode = DCA_3F; |
| 1500 | break; |
| 1501 | case 4: |
| 1502 | s->core_downmix_amode = DCA_2F1R; |
| 1503 | break; |
| 1504 | case 5: |
| 1505 | s->core_downmix_amode = DCA_2F2R; |
| 1506 | break; |
| 1507 | case 6: |
| 1508 | s->core_downmix_amode = DCA_3F1R; |
| 1509 | break; |
| 1510 | default: |
| 1511 | av_log(s->avctx, AV_LOG_ERROR, |
| 1512 | "Invalid mode %d for embedded downmix coefficients\n", |
| 1513 | am); |
| 1514 | return AVERROR_INVALIDDATA; |
| 1515 | } |
| 1516 | for (out = 0; out < dca_channels[s->core_downmix_amode]; out++) { |
| 1517 | for (in = 0; in < s->prim_channels + !!s->lfe; in++) { |
| 1518 | uint16_t tmp = get_bits(&s->gb, 9); |
| 1519 | if ((tmp & 0xFF) > 241) { |
| 1520 | av_log(s->avctx, AV_LOG_ERROR, |
| 1521 | "Invalid downmix coefficient code %"PRIu16"\n", |
| 1522 | tmp); |
| 1523 | return AVERROR_INVALIDDATA; |
| 1524 | } |
| 1525 | s->core_downmix_codes[in][out] = tmp; |
| 1526 | } |
| 1527 | } |
| 1528 | } |
| 1529 | |
| 1530 | align_get_bits(&s->gb); // byte align |
| 1531 | skip_bits(&s->gb, 16); // nAUXCRC16 |
| 1532 | |
| 1533 | // additional data (reserved, cf. ETSI TS 102 114 V1.4.1) |
| 1534 | if ((reserved = (aux_data_end - get_bits_count(&s->gb))) < 0) { |
| 1535 | av_log(s->avctx, AV_LOG_ERROR, |
| 1536 | "Overread auxiliary data by %d bits\n", -reserved); |
| 1537 | return AVERROR_INVALIDDATA; |
| 1538 | } else if (reserved) { |
| 1539 | avpriv_request_sample(s->avctx, |
| 1540 | "Core auxiliary data reserved content"); |
| 1541 | skip_bits_long(&s->gb, reserved); |
| 1542 | } |
| 1543 | } |
| 1544 | |
| 1545 | if (s->crc_present && s->dynrange) |
| 1546 | get_bits(&s->gb, 16); |
| 1547 | } |
| 1548 | |
| 1549 | return 0; |
| 1550 | } |
| 1551 | |
| 1552 | /** |
| 1553 | * Decode a dca frame block |
| 1554 | * |
| 1555 | * @param s pointer to the DCAContext |
| 1556 | */ |
| 1557 | |
| 1558 | static int dca_decode_block(DCAContext *s, int base_channel, int block_index) |
| 1559 | { |
| 1560 | int ret; |
| 1561 | |
| 1562 | /* Sanity check */ |
| 1563 | if (s->current_subframe >= s->subframes) { |
| 1564 | av_log(s->avctx, AV_LOG_DEBUG, "check failed: %i>%i", |
| 1565 | s->current_subframe, s->subframes); |
| 1566 | return AVERROR_INVALIDDATA; |
| 1567 | } |
| 1568 | |
| 1569 | if (!s->current_subsubframe) { |
| 1570 | #ifdef TRACE |
| 1571 | av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_header\n"); |
| 1572 | #endif |
| 1573 | /* Read subframe header */ |
| 1574 | if ((ret = dca_subframe_header(s, base_channel, block_index))) |
| 1575 | return ret; |
| 1576 | } |
| 1577 | |
| 1578 | /* Read subsubframe */ |
| 1579 | #ifdef TRACE |
| 1580 | av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subsubframe\n"); |
| 1581 | #endif |
| 1582 | if ((ret = dca_subsubframe(s, base_channel, block_index))) |
| 1583 | return ret; |
| 1584 | |
| 1585 | /* Update state */ |
| 1586 | s->current_subsubframe++; |
| 1587 | if (s->current_subsubframe >= s->subsubframes[s->current_subframe]) { |
| 1588 | s->current_subsubframe = 0; |
| 1589 | s->current_subframe++; |
| 1590 | } |
| 1591 | if (s->current_subframe >= s->subframes) { |
| 1592 | #ifdef TRACE |
| 1593 | av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_footer\n"); |
| 1594 | #endif |
| 1595 | /* Read subframe footer */ |
| 1596 | if ((ret = dca_subframe_footer(s, base_channel))) |
| 1597 | return ret; |
| 1598 | } |
| 1599 | |
| 1600 | return 0; |
| 1601 | } |
| 1602 | |
| 1603 | /** |
| 1604 | * Return the number of channels in an ExSS speaker mask (HD) |
| 1605 | */ |
| 1606 | static int dca_exss_mask2count(int mask) |
| 1607 | { |
| 1608 | /* count bits that mean speaker pairs twice */ |
| 1609 | return av_popcount(mask) + |
| 1610 | av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT | |
| 1611 | DCA_EXSS_FRONT_LEFT_RIGHT | |
| 1612 | DCA_EXSS_FRONT_HIGH_LEFT_RIGHT | |
| 1613 | DCA_EXSS_WIDE_LEFT_RIGHT | |
| 1614 | DCA_EXSS_SIDE_LEFT_RIGHT | |
| 1615 | DCA_EXSS_SIDE_HIGH_LEFT_RIGHT | |
| 1616 | DCA_EXSS_SIDE_REAR_LEFT_RIGHT | |
| 1617 | DCA_EXSS_REAR_LEFT_RIGHT | |
| 1618 | DCA_EXSS_REAR_HIGH_LEFT_RIGHT)); |
| 1619 | } |
| 1620 | |
| 1621 | /** |
| 1622 | * Skip mixing coefficients of a single mix out configuration (HD) |
| 1623 | */ |
| 1624 | static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch) |
| 1625 | { |
| 1626 | int i; |
| 1627 | |
| 1628 | for (i = 0; i < channels; i++) { |
| 1629 | int mix_map_mask = get_bits(gb, out_ch); |
| 1630 | int num_coeffs = av_popcount(mix_map_mask); |
| 1631 | skip_bits_long(gb, num_coeffs * 6); |
| 1632 | } |
| 1633 | } |
| 1634 | |
| 1635 | /** |
| 1636 | * Parse extension substream asset header (HD) |
| 1637 | */ |
| 1638 | static int dca_exss_parse_asset_header(DCAContext *s) |
| 1639 | { |
| 1640 | int header_pos = get_bits_count(&s->gb); |
| 1641 | int header_size; |
| 1642 | int channels = 0; |
| 1643 | int embedded_stereo = 0; |
| 1644 | int embedded_6ch = 0; |
| 1645 | int drc_code_present; |
| 1646 | int av_uninit(extensions_mask); |
| 1647 | int i, j; |
| 1648 | |
| 1649 | if (get_bits_left(&s->gb) < 16) |
| 1650 | return -1; |
| 1651 | |
| 1652 | /* We will parse just enough to get to the extensions bitmask with which |
| 1653 | * we can set the profile value. */ |
| 1654 | |
| 1655 | header_size = get_bits(&s->gb, 9) + 1; |
| 1656 | skip_bits(&s->gb, 3); // asset index |
| 1657 | |
| 1658 | if (s->static_fields) { |
| 1659 | if (get_bits1(&s->gb)) |
| 1660 | skip_bits(&s->gb, 4); // asset type descriptor |
| 1661 | if (get_bits1(&s->gb)) |
| 1662 | skip_bits_long(&s->gb, 24); // language descriptor |
| 1663 | |
| 1664 | if (get_bits1(&s->gb)) { |
| 1665 | /* How can one fit 1024 bytes of text here if the maximum value |
| 1666 | * for the asset header size field above was 512 bytes? */ |
| 1667 | int text_length = get_bits(&s->gb, 10) + 1; |
| 1668 | if (get_bits_left(&s->gb) < text_length * 8) |
| 1669 | return -1; |
| 1670 | skip_bits_long(&s->gb, text_length * 8); // info text |
| 1671 | } |
| 1672 | |
| 1673 | skip_bits(&s->gb, 5); // bit resolution - 1 |
| 1674 | skip_bits(&s->gb, 4); // max sample rate code |
| 1675 | channels = get_bits(&s->gb, 8) + 1; |
| 1676 | |
| 1677 | if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers |
| 1678 | int spkr_remap_sets; |
| 1679 | int spkr_mask_size = 16; |
| 1680 | int num_spkrs[7]; |
| 1681 | |
| 1682 | if (channels > 2) |
| 1683 | embedded_stereo = get_bits1(&s->gb); |
| 1684 | if (channels > 6) |
| 1685 | embedded_6ch = get_bits1(&s->gb); |
| 1686 | |
| 1687 | if (get_bits1(&s->gb)) { |
| 1688 | spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2; |
| 1689 | skip_bits(&s->gb, spkr_mask_size); // spkr activity mask |
| 1690 | } |
| 1691 | |
| 1692 | spkr_remap_sets = get_bits(&s->gb, 3); |
| 1693 | |
| 1694 | for (i = 0; i < spkr_remap_sets; i++) { |
| 1695 | /* std layout mask for each remap set */ |
| 1696 | num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size)); |
| 1697 | } |
| 1698 | |
| 1699 | for (i = 0; i < spkr_remap_sets; i++) { |
| 1700 | int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1; |
| 1701 | if (get_bits_left(&s->gb) < 0) |
| 1702 | return -1; |
| 1703 | |
| 1704 | for (j = 0; j < num_spkrs[i]; j++) { |
| 1705 | int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps); |
| 1706 | int num_dec_ch = av_popcount(remap_dec_ch_mask); |
| 1707 | skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes |
| 1708 | } |
| 1709 | } |
| 1710 | |
| 1711 | } else { |
| 1712 | skip_bits(&s->gb, 3); // representation type |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | drc_code_present = get_bits1(&s->gb); |
| 1717 | if (drc_code_present) |
| 1718 | get_bits(&s->gb, 8); // drc code |
| 1719 | |
| 1720 | if (get_bits1(&s->gb)) |
| 1721 | skip_bits(&s->gb, 5); // dialog normalization code |
| 1722 | |
| 1723 | if (drc_code_present && embedded_stereo) |
| 1724 | get_bits(&s->gb, 8); // drc stereo code |
| 1725 | |
| 1726 | if (s->mix_metadata && get_bits1(&s->gb)) { |
| 1727 | skip_bits(&s->gb, 1); // external mix |
| 1728 | skip_bits(&s->gb, 6); // post mix gain code |
| 1729 | |
| 1730 | if (get_bits(&s->gb, 2) != 3) // mixer drc code |
| 1731 | skip_bits(&s->gb, 3); // drc limit |
| 1732 | else |
| 1733 | skip_bits(&s->gb, 8); // custom drc code |
| 1734 | |
| 1735 | if (get_bits1(&s->gb)) // channel specific scaling |
| 1736 | for (i = 0; i < s->num_mix_configs; i++) |
| 1737 | skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes |
| 1738 | else |
| 1739 | skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes |
| 1740 | |
| 1741 | for (i = 0; i < s->num_mix_configs; i++) { |
| 1742 | if (get_bits_left(&s->gb) < 0) |
| 1743 | return -1; |
| 1744 | dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]); |
| 1745 | if (embedded_6ch) |
| 1746 | dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]); |
| 1747 | if (embedded_stereo) |
| 1748 | dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]); |
| 1749 | } |
| 1750 | } |
| 1751 | |
| 1752 | switch (get_bits(&s->gb, 2)) { |
| 1753 | case 0: extensions_mask = get_bits(&s->gb, 12); break; |
| 1754 | case 1: extensions_mask = DCA_EXT_EXSS_XLL; break; |
| 1755 | case 2: extensions_mask = DCA_EXT_EXSS_LBR; break; |
| 1756 | case 3: extensions_mask = 0; /* aux coding */ break; |
| 1757 | } |
| 1758 | |
| 1759 | /* not parsed further, we were only interested in the extensions mask */ |
| 1760 | |
| 1761 | if (get_bits_left(&s->gb) < 0) |
| 1762 | return -1; |
| 1763 | |
| 1764 | if (get_bits_count(&s->gb) - header_pos > header_size * 8) { |
| 1765 | av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n"); |
| 1766 | return -1; |
| 1767 | } |
| 1768 | skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb)); |
| 1769 | |
| 1770 | if (extensions_mask & DCA_EXT_EXSS_XLL) |
| 1771 | s->profile = FF_PROFILE_DTS_HD_MA; |
| 1772 | else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 | |
| 1773 | DCA_EXT_EXSS_XXCH)) |
| 1774 | s->profile = FF_PROFILE_DTS_HD_HRA; |
| 1775 | |
| 1776 | if (!(extensions_mask & DCA_EXT_CORE)) |
| 1777 | av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n"); |
| 1778 | if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask) |
| 1779 | av_log(s->avctx, AV_LOG_WARNING, |
| 1780 | "DTS extensions detection mismatch (%d, %d)\n", |
| 1781 | extensions_mask & DCA_CORE_EXTS, s->core_ext_mask); |
| 1782 | |
| 1783 | return 0; |
| 1784 | } |
| 1785 | |
| 1786 | static int dca_xbr_parse_frame(DCAContext *s) |
| 1787 | { |
| 1788 | int scale_table_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS][2]; |
| 1789 | int active_bands[DCA_CHSETS_MAX][DCA_CHSET_CHANS_MAX]; |
| 1790 | int abits_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS]; |
| 1791 | int anctemp[DCA_CHSET_CHANS_MAX]; |
| 1792 | int chset_fsize[DCA_CHSETS_MAX]; |
| 1793 | int n_xbr_ch[DCA_CHSETS_MAX]; |
| 1794 | int hdr_size, num_chsets, xbr_tmode, hdr_pos; |
| 1795 | int i, j, k, l, chset, chan_base; |
| 1796 | |
| 1797 | av_log(s->avctx, AV_LOG_DEBUG, "DTS-XBR: decoding XBR extension\n"); |
| 1798 | |
| 1799 | /* get bit position of sync header */ |
| 1800 | hdr_pos = get_bits_count(&s->gb) - 32; |
| 1801 | |
| 1802 | hdr_size = get_bits(&s->gb, 6) + 1; |
| 1803 | num_chsets = get_bits(&s->gb, 2) + 1; |
| 1804 | |
| 1805 | for(i = 0; i < num_chsets; i++) |
| 1806 | chset_fsize[i] = get_bits(&s->gb, 14) + 1; |
| 1807 | |
| 1808 | xbr_tmode = get_bits1(&s->gb); |
| 1809 | |
| 1810 | for(i = 0; i < num_chsets; i++) { |
| 1811 | n_xbr_ch[i] = get_bits(&s->gb, 3) + 1; |
| 1812 | k = get_bits(&s->gb, 2) + 5; |
| 1813 | for(j = 0; j < n_xbr_ch[i]; j++) |
| 1814 | active_bands[i][j] = get_bits(&s->gb, k) + 1; |
| 1815 | } |
| 1816 | |
| 1817 | /* skip to the end of the header */ |
| 1818 | i = get_bits_count(&s->gb); |
| 1819 | if(hdr_pos + hdr_size * 8 > i) |
| 1820 | skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); |
| 1821 | |
| 1822 | /* loop over the channel data sets */ |
| 1823 | /* only decode as many channels as we've decoded base data for */ |
| 1824 | for(chset = 0, chan_base = 0; |
| 1825 | chset < num_chsets && chan_base + n_xbr_ch[chset] <= s->prim_channels; |
| 1826 | chan_base += n_xbr_ch[chset++]) { |
| 1827 | int start_posn = get_bits_count(&s->gb); |
| 1828 | int subsubframe = 0; |
| 1829 | int subframe = 0; |
| 1830 | |
| 1831 | /* loop over subframes */ |
| 1832 | for (k = 0; k < (s->sample_blocks / 8); k++) { |
| 1833 | /* parse header if we're on first subsubframe of a block */ |
| 1834 | if(subsubframe == 0) { |
| 1835 | /* Parse subframe header */ |
| 1836 | for(i = 0; i < n_xbr_ch[chset]; i++) { |
| 1837 | anctemp[i] = get_bits(&s->gb, 2) + 2; |
| 1838 | } |
| 1839 | |
| 1840 | for(i = 0; i < n_xbr_ch[chset]; i++) { |
| 1841 | get_array(&s->gb, abits_high[i], active_bands[chset][i], anctemp[i]); |
| 1842 | } |
| 1843 | |
| 1844 | for(i = 0; i < n_xbr_ch[chset]; i++) { |
| 1845 | anctemp[i] = get_bits(&s->gb, 3); |
| 1846 | if(anctemp[i] < 1) { |
| 1847 | av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: SYNC ERROR\n"); |
| 1848 | return AVERROR_INVALIDDATA; |
| 1849 | } |
| 1850 | } |
| 1851 | |
| 1852 | /* generate scale factors */ |
| 1853 | for(i = 0; i < n_xbr_ch[chset]; i++) { |
| 1854 | const uint32_t *scale_table; |
| 1855 | int nbits; |
| 1856 | |
| 1857 | if (s->scalefactor_huffman[chan_base+i] == 6) { |
| 1858 | scale_table = scale_factor_quant7; |
| 1859 | } else { |
| 1860 | scale_table = scale_factor_quant6; |
| 1861 | } |
| 1862 | |
| 1863 | nbits = anctemp[i]; |
| 1864 | |
| 1865 | for(j = 0; j < active_bands[chset][i]; j++) { |
| 1866 | if(abits_high[i][j] > 0) { |
| 1867 | scale_table_high[i][j][0] = |
| 1868 | scale_table[get_bits(&s->gb, nbits)]; |
| 1869 | |
| 1870 | if(xbr_tmode && s->transition_mode[i][j]) { |
| 1871 | scale_table_high[i][j][1] = |
| 1872 | scale_table[get_bits(&s->gb, nbits)]; |
| 1873 | } |
| 1874 | } |
| 1875 | } |
| 1876 | } |
| 1877 | } |
| 1878 | |
| 1879 | /* decode audio array for this block */ |
| 1880 | for(i = 0; i < n_xbr_ch[chset]; i++) { |
| 1881 | for(j = 0; j < active_bands[chset][i]; j++) { |
| 1882 | const int xbr_abits = abits_high[i][j]; |
| 1883 | const float quant_step_size = lossless_quant_d[xbr_abits]; |
| 1884 | const int sfi = xbr_tmode && s->transition_mode[i][j] && subsubframe >= s->transition_mode[i][j]; |
| 1885 | const float rscale = quant_step_size * scale_table_high[i][j][sfi]; |
| 1886 | float *subband_samples = s->subband_samples[k][chan_base+i][j]; |
| 1887 | int block[8]; |
| 1888 | |
| 1889 | if(xbr_abits <= 0) |
| 1890 | continue; |
| 1891 | |
| 1892 | if(xbr_abits > 7) { |
| 1893 | get_array(&s->gb, block, 8, xbr_abits - 3); |
| 1894 | } else { |
| 1895 | int block_code1, block_code2, size, levels, err; |
| 1896 | |
| 1897 | size = abits_sizes[xbr_abits - 1]; |
| 1898 | levels = abits_levels[xbr_abits - 1]; |
| 1899 | |
| 1900 | block_code1 = get_bits(&s->gb, size); |
| 1901 | block_code2 = get_bits(&s->gb, size); |
| 1902 | err = decode_blockcodes(block_code1, block_code2, |
| 1903 | levels, block); |
| 1904 | if (err) { |
| 1905 | av_log(s->avctx, AV_LOG_ERROR, |
| 1906 | "ERROR: DTS-XBR: block code look-up failed\n"); |
| 1907 | return AVERROR_INVALIDDATA; |
| 1908 | } |
| 1909 | } |
| 1910 | |
| 1911 | /* scale & sum into subband */ |
| 1912 | for(l = 0; l < 8; l++) |
| 1913 | subband_samples[l] += (float)block[l] * rscale; |
| 1914 | } |
| 1915 | } |
| 1916 | |
| 1917 | /* check DSYNC marker */ |
| 1918 | if(s->aspf || subsubframe == s->subsubframes[subframe] - 1) { |
| 1919 | if(get_bits(&s->gb, 16) != 0xffff) { |
| 1920 | av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: Didn't get subframe DSYNC\n"); |
| 1921 | return AVERROR_INVALIDDATA; |
| 1922 | } |
| 1923 | } |
| 1924 | |
| 1925 | /* advance sub-sub-frame index */ |
| 1926 | if(++subsubframe >= s->subsubframes[subframe]) { |
| 1927 | subsubframe = 0; |
| 1928 | subframe++; |
| 1929 | } |
| 1930 | } |
| 1931 | |
| 1932 | /* skip to next channel set */ |
| 1933 | i = get_bits_count(&s->gb); |
| 1934 | if(start_posn + chset_fsize[chset] * 8 != i) { |
| 1935 | j = start_posn + chset_fsize[chset] * 8 - i; |
| 1936 | if(j < 0 || j >= 8) |
| 1937 | av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: end of channel set," |
| 1938 | " skipping further than expected (%d bits)\n", j); |
| 1939 | skip_bits_long(&s->gb, j); |
| 1940 | } |
| 1941 | } |
| 1942 | |
| 1943 | return 0; |
| 1944 | } |
| 1945 | |
| 1946 | /* parse initial header for XXCH and dump details */ |
| 1947 | static int dca_xxch_decode_frame(DCAContext *s) |
| 1948 | { |
| 1949 | int hdr_size, spkmsk_bits, num_chsets, core_spk, hdr_pos; |
| 1950 | int i, chset, base_channel, chstart, fsize[8]; |
| 1951 | |
| 1952 | /* assume header word has already been parsed */ |
| 1953 | hdr_pos = get_bits_count(&s->gb) - 32; |
| 1954 | hdr_size = get_bits(&s->gb, 6) + 1; |
| 1955 | /*chhdr_crc =*/ skip_bits1(&s->gb); |
| 1956 | spkmsk_bits = get_bits(&s->gb, 5) + 1; |
| 1957 | num_chsets = get_bits(&s->gb, 2) + 1; |
| 1958 | |
| 1959 | for (i = 0; i < num_chsets; i++) |
| 1960 | fsize[i] = get_bits(&s->gb, 14) + 1; |
| 1961 | |
| 1962 | core_spk = get_bits(&s->gb, spkmsk_bits); |
| 1963 | s->xxch_core_spkmask = core_spk; |
| 1964 | s->xxch_nbits_spk_mask = spkmsk_bits; |
| 1965 | s->xxch_dmix_embedded = 0; |
| 1966 | |
| 1967 | /* skip to the end of the header */ |
| 1968 | i = get_bits_count(&s->gb); |
| 1969 | if (hdr_pos + hdr_size * 8 > i) |
| 1970 | skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); |
| 1971 | |
| 1972 | for (chset = 0; chset < num_chsets; chset++) { |
| 1973 | chstart = get_bits_count(&s->gb); |
| 1974 | base_channel = s->prim_channels; |
| 1975 | s->xxch_chset = chset; |
| 1976 | |
| 1977 | /* XXCH and Core headers differ, see 6.4.2 "XXCH Channel Set Header" vs. |
| 1978 | 5.3.2 "Primary Audio Coding Header", DTS Spec 1.3.1 */ |
| 1979 | dca_parse_audio_coding_header(s, base_channel, 1); |
| 1980 | |
| 1981 | /* decode channel data */ |
| 1982 | for (i = 0; i < (s->sample_blocks / 8); i++) { |
| 1983 | if (dca_decode_block(s, base_channel, i)) { |
| 1984 | av_log(s->avctx, AV_LOG_ERROR, |
| 1985 | "Error decoding DTS-XXCH extension\n"); |
| 1986 | continue; |
| 1987 | } |
| 1988 | } |
| 1989 | |
| 1990 | /* skip to end of this section */ |
| 1991 | i = get_bits_count(&s->gb); |
| 1992 | if (chstart + fsize[chset] * 8 > i) |
| 1993 | skip_bits_long(&s->gb, chstart + fsize[chset] * 8 - i); |
| 1994 | } |
| 1995 | s->xxch_chset = num_chsets; |
| 1996 | |
| 1997 | return 0; |
| 1998 | } |
| 1999 | |
| 2000 | /** |
| 2001 | * Parse extension substream header (HD) |
| 2002 | */ |
| 2003 | static void dca_exss_parse_header(DCAContext *s) |
| 2004 | { |
| 2005 | int asset_size[8]; |
| 2006 | int ss_index; |
| 2007 | int blownup; |
| 2008 | int num_audiop = 1; |
| 2009 | int num_assets = 1; |
| 2010 | int active_ss_mask[8]; |
| 2011 | int i, j; |
| 2012 | int start_posn; |
| 2013 | int hdrsize; |
| 2014 | uint32_t mkr; |
| 2015 | |
| 2016 | if (get_bits_left(&s->gb) < 52) |
| 2017 | return; |
| 2018 | |
| 2019 | start_posn = get_bits_count(&s->gb) - 32; |
| 2020 | |
| 2021 | skip_bits(&s->gb, 8); // user data |
| 2022 | ss_index = get_bits(&s->gb, 2); |
| 2023 | |
| 2024 | blownup = get_bits1(&s->gb); |
| 2025 | hdrsize = get_bits(&s->gb, 8 + 4 * blownup) + 1; // header_size |
| 2026 | skip_bits(&s->gb, 16 + 4 * blownup); // hd_size |
| 2027 | |
| 2028 | s->static_fields = get_bits1(&s->gb); |
| 2029 | if (s->static_fields) { |
| 2030 | skip_bits(&s->gb, 2); // reference clock code |
| 2031 | skip_bits(&s->gb, 3); // frame duration code |
| 2032 | |
| 2033 | if (get_bits1(&s->gb)) |
| 2034 | skip_bits_long(&s->gb, 36); // timestamp |
| 2035 | |
| 2036 | /* a single stream can contain multiple audio assets that can be |
| 2037 | * combined to form multiple audio presentations */ |
| 2038 | |
| 2039 | num_audiop = get_bits(&s->gb, 3) + 1; |
| 2040 | if (num_audiop > 1) { |
| 2041 | avpriv_request_sample(s->avctx, |
| 2042 | "Multiple DTS-HD audio presentations"); |
| 2043 | /* ignore such streams for now */ |
| 2044 | return; |
| 2045 | } |
| 2046 | |
| 2047 | num_assets = get_bits(&s->gb, 3) + 1; |
| 2048 | if (num_assets > 1) { |
| 2049 | avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets"); |
| 2050 | /* ignore such streams for now */ |
| 2051 | return; |
| 2052 | } |
| 2053 | |
| 2054 | for (i = 0; i < num_audiop; i++) |
| 2055 | active_ss_mask[i] = get_bits(&s->gb, ss_index + 1); |
| 2056 | |
| 2057 | for (i = 0; i < num_audiop; i++) |
| 2058 | for (j = 0; j <= ss_index; j++) |
| 2059 | if (active_ss_mask[i] & (1 << j)) |
| 2060 | skip_bits(&s->gb, 8); // active asset mask |
| 2061 | |
| 2062 | s->mix_metadata = get_bits1(&s->gb); |
| 2063 | if (s->mix_metadata) { |
| 2064 | int mix_out_mask_size; |
| 2065 | |
| 2066 | skip_bits(&s->gb, 2); // adjustment level |
| 2067 | mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2; |
| 2068 | s->num_mix_configs = get_bits(&s->gb, 2) + 1; |
| 2069 | |
| 2070 | for (i = 0; i < s->num_mix_configs; i++) { |
| 2071 | int mix_out_mask = get_bits(&s->gb, mix_out_mask_size); |
| 2072 | s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask); |
| 2073 | } |
| 2074 | } |
| 2075 | } |
| 2076 | |
| 2077 | av_assert0(num_assets > 0); // silence a warning |
| 2078 | |
| 2079 | for (i = 0; i < num_assets; i++) |
| 2080 | asset_size[i] = get_bits_long(&s->gb, 16 + 4 * blownup); |
| 2081 | |
| 2082 | for (i = 0; i < num_assets; i++) { |
| 2083 | if (dca_exss_parse_asset_header(s)) |
| 2084 | return; |
| 2085 | } |
| 2086 | |
| 2087 | /* not parsed further, we were only interested in the extensions mask |
| 2088 | * from the asset header */ |
| 2089 | |
| 2090 | j = get_bits_count(&s->gb); |
| 2091 | if (start_posn + hdrsize * 8 > j) |
| 2092 | skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j); |
| 2093 | |
| 2094 | for (i = 0; i < num_assets; i++) { |
| 2095 | start_posn = get_bits_count(&s->gb); |
| 2096 | mkr = get_bits_long(&s->gb, 32); |
| 2097 | |
| 2098 | /* parse extensions that we know about */ |
| 2099 | if (mkr == 0x655e315e) { |
| 2100 | dca_xbr_parse_frame(s); |
| 2101 | } else if (mkr == 0x47004a03) { |
| 2102 | dca_xxch_decode_frame(s); |
| 2103 | s->core_ext_mask |= DCA_EXT_XXCH; /* xxx use for chan reordering */ |
| 2104 | } else { |
| 2105 | av_log(s->avctx, AV_LOG_DEBUG, |
| 2106 | "DTS-ExSS: unknown marker = 0x%08x\n", mkr); |
| 2107 | } |
| 2108 | |
| 2109 | /* skip to end of block */ |
| 2110 | j = get_bits_count(&s->gb); |
| 2111 | if (start_posn + asset_size[i] * 8 > j) |
| 2112 | skip_bits_long(&s->gb, start_posn + asset_size[i] * 8 - j); |
| 2113 | } |
| 2114 | } |
| 2115 | |
| 2116 | static float dca_dmix_code(unsigned code) |
| 2117 | { |
| 2118 | int sign = (code >> 8) - 1; |
| 2119 | code &= 0xff; |
| 2120 | return ((dca_dmixtable[code] ^ sign) - sign) * (1.0 / (1 << 15)); |
| 2121 | } |
| 2122 | |
| 2123 | /** |
| 2124 | * Main frame decoding function |
| 2125 | * FIXME add arguments |
| 2126 | */ |
| 2127 | static int dca_decode_frame(AVCodecContext *avctx, void *data, |
| 2128 | int *got_frame_ptr, AVPacket *avpkt) |
| 2129 | { |
| 2130 | AVFrame *frame = data; |
| 2131 | const uint8_t *buf = avpkt->data; |
| 2132 | int buf_size = avpkt->size; |
| 2133 | int channel_mask; |
| 2134 | int channel_layout; |
| 2135 | int lfe_samples; |
| 2136 | int num_core_channels = 0; |
| 2137 | int i, ret; |
| 2138 | float **samples_flt; |
| 2139 | float *src_chan; |
| 2140 | float *dst_chan; |
| 2141 | DCAContext *s = avctx->priv_data; |
| 2142 | int core_ss_end; |
| 2143 | int channels, full_channels; |
| 2144 | float scale; |
| 2145 | int achan; |
| 2146 | int chset; |
| 2147 | int mask; |
| 2148 | int lavc; |
| 2149 | int posn; |
| 2150 | int j, k; |
| 2151 | int endch; |
| 2152 | |
| 2153 | s->xch_present = 0; |
| 2154 | |
| 2155 | s->dca_buffer_size = avpriv_dca_convert_bitstream(buf, buf_size, s->dca_buffer, |
| 2156 | DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE); |
| 2157 | if (s->dca_buffer_size == AVERROR_INVALIDDATA) { |
| 2158 | av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n"); |
| 2159 | return AVERROR_INVALIDDATA; |
| 2160 | } |
| 2161 | |
| 2162 | if ((ret = dca_parse_frame_header(s)) < 0) { |
| 2163 | //seems like the frame is corrupt, try with the next one |
| 2164 | return ret; |
| 2165 | } |
| 2166 | //set AVCodec values with parsed data |
| 2167 | avctx->sample_rate = s->sample_rate; |
| 2168 | avctx->bit_rate = s->bit_rate; |
| 2169 | |
| 2170 | s->profile = FF_PROFILE_DTS; |
| 2171 | |
| 2172 | for (i = 0; i < (s->sample_blocks / 8); i++) { |
| 2173 | if ((ret = dca_decode_block(s, 0, i))) { |
| 2174 | av_log(avctx, AV_LOG_ERROR, "error decoding block\n"); |
| 2175 | return ret; |
| 2176 | } |
| 2177 | } |
| 2178 | |
| 2179 | /* record number of core channels incase less than max channels are requested */ |
| 2180 | num_core_channels = s->prim_channels; |
| 2181 | |
| 2182 | if (s->prim_channels + !!s->lfe > 2 && |
| 2183 | avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| 2184 | /* Stereo downmix coefficients |
| 2185 | * |
| 2186 | * The decoder can only downmix to 2-channel, so we need to ensure |
| 2187 | * embedded downmix coefficients are actually targeting 2-channel. |
| 2188 | */ |
| 2189 | if (s->core_downmix && (s->core_downmix_amode == DCA_STEREO || |
| 2190 | s->core_downmix_amode == DCA_STEREO_TOTAL)) { |
| 2191 | for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| 2192 | /* Range checked earlier */ |
| 2193 | s->downmix_coef[i][0] = dca_dmix_code(s->core_downmix_codes[i][0]); |
| 2194 | s->downmix_coef[i][1] = dca_dmix_code(s->core_downmix_codes[i][1]); |
| 2195 | } |
| 2196 | s->output = s->core_downmix_amode; |
| 2197 | } else { |
| 2198 | int am = s->amode & DCA_CHANNEL_MASK; |
| 2199 | if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) { |
| 2200 | av_log(s->avctx, AV_LOG_ERROR, |
| 2201 | "Invalid channel mode %d\n", am); |
| 2202 | return AVERROR_INVALIDDATA; |
| 2203 | } |
| 2204 | if (num_core_channels + !!s->lfe > |
| 2205 | FF_ARRAY_ELEMS(dca_default_coeffs[0])) { |
| 2206 | avpriv_request_sample(s->avctx, "Downmixing %d channels", |
| 2207 | s->prim_channels + !!s->lfe); |
| 2208 | return AVERROR_PATCHWELCOME; |
| 2209 | } |
| 2210 | for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| 2211 | s->downmix_coef[i][0] = dca_default_coeffs[am][i][0]; |
| 2212 | s->downmix_coef[i][1] = dca_default_coeffs[am][i][1]; |
| 2213 | } |
| 2214 | } |
| 2215 | av_dlog(s->avctx, "Stereo downmix coeffs:\n"); |
| 2216 | for (i = 0; i < num_core_channels + !!s->lfe; i++) { |
| 2217 | av_dlog(s->avctx, "L, input channel %d = %f\n", i, |
| 2218 | s->downmix_coef[i][0]); |
| 2219 | av_dlog(s->avctx, "R, input channel %d = %f\n", i, |
| 2220 | s->downmix_coef[i][1]); |
| 2221 | } |
| 2222 | av_dlog(s->avctx, "\n"); |
| 2223 | } |
| 2224 | |
| 2225 | if (s->ext_coding) |
| 2226 | s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr]; |
| 2227 | else |
| 2228 | s->core_ext_mask = 0; |
| 2229 | |
| 2230 | core_ss_end = FFMIN(s->frame_size, s->dca_buffer_size) * 8; |
| 2231 | |
| 2232 | /* only scan for extensions if ext_descr was unknown or indicated a |
| 2233 | * supported XCh extension */ |
| 2234 | if (s->core_ext_mask < 0 || s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) { |
| 2235 | |
| 2236 | /* if ext_descr was unknown, clear s->core_ext_mask so that the |
| 2237 | * extensions scan can fill it up */ |
| 2238 | s->core_ext_mask = FFMAX(s->core_ext_mask, 0); |
| 2239 | |
| 2240 | /* extensions start at 32-bit boundaries into bitstream */ |
| 2241 | skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| 2242 | |
| 2243 | while (core_ss_end - get_bits_count(&s->gb) >= 32) { |
| 2244 | uint32_t bits = get_bits_long(&s->gb, 32); |
| 2245 | |
| 2246 | switch (bits) { |
| 2247 | case 0x5a5a5a5a: { |
| 2248 | int ext_amode, xch_fsize; |
| 2249 | |
| 2250 | s->xch_base_channel = s->prim_channels; |
| 2251 | |
| 2252 | /* validate sync word using XCHFSIZE field */ |
| 2253 | xch_fsize = show_bits(&s->gb, 10); |
| 2254 | if ((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) && |
| 2255 | (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1)) |
| 2256 | continue; |
| 2257 | |
| 2258 | /* skip length-to-end-of-frame field for the moment */ |
| 2259 | skip_bits(&s->gb, 10); |
| 2260 | |
| 2261 | s->core_ext_mask |= DCA_EXT_XCH; |
| 2262 | |
| 2263 | /* extension amode(number of channels in extension) should be 1 */ |
| 2264 | /* AFAIK XCh is not used for more channels */ |
| 2265 | if ((ext_amode = get_bits(&s->gb, 4)) != 1) { |
| 2266 | av_log(avctx, AV_LOG_ERROR, "XCh extension amode %d not" |
| 2267 | " supported!\n", ext_amode); |
| 2268 | continue; |
| 2269 | } |
| 2270 | |
| 2271 | if (s->xch_base_channel < 2) { |
| 2272 | avpriv_request_sample(avctx, "XCh with fewer than 2 base channels"); |
| 2273 | continue; |
| 2274 | } |
| 2275 | |
| 2276 | /* much like core primary audio coding header */ |
| 2277 | dca_parse_audio_coding_header(s, s->xch_base_channel, 0); |
| 2278 | |
| 2279 | for (i = 0; i < (s->sample_blocks / 8); i++) |
| 2280 | if ((ret = dca_decode_block(s, s->xch_base_channel, i))) { |
| 2281 | av_log(avctx, AV_LOG_ERROR, "error decoding XCh extension\n"); |
| 2282 | continue; |
| 2283 | } |
| 2284 | |
| 2285 | s->xch_present = 1; |
| 2286 | break; |
| 2287 | } |
| 2288 | case 0x47004a03: |
| 2289 | /* XXCh: extended channels */ |
| 2290 | /* usually found either in core or HD part in DTS-HD HRA streams, |
| 2291 | * but not in DTS-ES which contains XCh extensions instead */ |
| 2292 | s->core_ext_mask |= DCA_EXT_XXCH; |
| 2293 | dca_xxch_decode_frame(s); |
| 2294 | break; |
| 2295 | |
| 2296 | case 0x1d95f262: { |
| 2297 | int fsize96 = show_bits(&s->gb, 12) + 1; |
| 2298 | if (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + fsize96) |
| 2299 | continue; |
| 2300 | |
| 2301 | av_log(avctx, AV_LOG_DEBUG, "X96 extension found at %d bits\n", |
| 2302 | get_bits_count(&s->gb)); |
| 2303 | skip_bits(&s->gb, 12); |
| 2304 | av_log(avctx, AV_LOG_DEBUG, "FSIZE96 = %d bytes\n", fsize96); |
| 2305 | av_log(avctx, AV_LOG_DEBUG, "REVNO = %d\n", get_bits(&s->gb, 4)); |
| 2306 | |
| 2307 | s->core_ext_mask |= DCA_EXT_X96; |
| 2308 | break; |
| 2309 | } |
| 2310 | } |
| 2311 | |
| 2312 | skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31); |
| 2313 | } |
| 2314 | } else { |
| 2315 | /* no supported extensions, skip the rest of the core substream */ |
| 2316 | skip_bits_long(&s->gb, core_ss_end - get_bits_count(&s->gb)); |
| 2317 | } |
| 2318 | |
| 2319 | if (s->core_ext_mask & DCA_EXT_X96) |
| 2320 | s->profile = FF_PROFILE_DTS_96_24; |
| 2321 | else if (s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH)) |
| 2322 | s->profile = FF_PROFILE_DTS_ES; |
| 2323 | |
| 2324 | /* check for ExSS (HD part) */ |
| 2325 | if (s->dca_buffer_size - s->frame_size > 32 && |
| 2326 | get_bits_long(&s->gb, 32) == DCA_HD_MARKER) |
| 2327 | dca_exss_parse_header(s); |
| 2328 | |
| 2329 | avctx->profile = s->profile; |
| 2330 | |
| 2331 | full_channels = channels = s->prim_channels + !!s->lfe; |
| 2332 | |
| 2333 | /* If we have XXCH then the channel layout is managed differently */ |
| 2334 | /* note that XLL will also have another way to do things */ |
| 2335 | if (!(s->core_ext_mask & DCA_EXT_XXCH) |
| 2336 | || (s->core_ext_mask & DCA_EXT_XXCH && avctx->request_channels > 0 |
| 2337 | && avctx->request_channels |
| 2338 | < num_core_channels + !!s->lfe + s->xxch_chset_nch[0])) |
| 2339 | { /* xxx should also do MA extensions */ |
| 2340 | if (s->amode < 16) { |
| 2341 | avctx->channel_layout = dca_core_channel_layout[s->amode]; |
| 2342 | |
| 2343 | if (s->prim_channels + !!s->lfe > 2 && |
| 2344 | avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| 2345 | /* |
| 2346 | * Neither the core's auxiliary data nor our default tables contain |
| 2347 | * downmix coefficients for the additional channel coded in the XCh |
| 2348 | * extension, so when we're doing a Stereo downmix, don't decode it. |
| 2349 | */ |
| 2350 | s->xch_disable = 1; |
| 2351 | } |
| 2352 | |
| 2353 | #if FF_API_REQUEST_CHANNELS |
| 2354 | FF_DISABLE_DEPRECATION_WARNINGS |
| 2355 | if (s->xch_present && !s->xch_disable && |
| 2356 | (!avctx->request_channels || |
| 2357 | avctx->request_channels > num_core_channels + !!s->lfe)) { |
| 2358 | FF_ENABLE_DEPRECATION_WARNINGS |
| 2359 | #else |
| 2360 | if (s->xch_present && !s->xch_disable) { |
| 2361 | #endif |
| 2362 | avctx->channel_layout |= AV_CH_BACK_CENTER; |
| 2363 | if (s->lfe) { |
| 2364 | avctx->channel_layout |= AV_CH_LOW_FREQUENCY; |
| 2365 | s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode]; |
| 2366 | } else { |
| 2367 | s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode]; |
| 2368 | } |
| 2369 | if (s->channel_order_tab[s->xch_base_channel] < 0) |
| 2370 | return AVERROR_INVALIDDATA; |
| 2371 | } else { |
| 2372 | channels = num_core_channels + !!s->lfe; |
| 2373 | s->xch_present = 0; /* disable further xch processing */ |
| 2374 | if (s->lfe) { |
| 2375 | avctx->channel_layout |= AV_CH_LOW_FREQUENCY; |
| 2376 | s->channel_order_tab = dca_channel_reorder_lfe[s->amode]; |
| 2377 | } else |
| 2378 | s->channel_order_tab = dca_channel_reorder_nolfe[s->amode]; |
| 2379 | } |
| 2380 | |
| 2381 | if (channels > !!s->lfe && |
| 2382 | s->channel_order_tab[channels - 1 - !!s->lfe] < 0) |
| 2383 | return AVERROR_INVALIDDATA; |
| 2384 | |
| 2385 | if (av_get_channel_layout_nb_channels(avctx->channel_layout) != channels) { |
| 2386 | av_log(avctx, AV_LOG_ERROR, "Number of channels %d mismatches layout %d\n", channels, av_get_channel_layout_nb_channels(avctx->channel_layout)); |
| 2387 | return AVERROR_INVALIDDATA; |
| 2388 | } |
| 2389 | |
| 2390 | if (num_core_channels + !!s->lfe > 2 && |
| 2391 | avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) { |
| 2392 | channels = 2; |
| 2393 | s->output = s->prim_channels == 2 ? s->amode : DCA_STEREO; |
| 2394 | avctx->channel_layout = AV_CH_LAYOUT_STEREO; |
| 2395 | } |
| 2396 | else if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE) { |
| 2397 | static const int8_t dca_channel_order_native[9] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 }; |
| 2398 | s->channel_order_tab = dca_channel_order_native; |
| 2399 | } |
| 2400 | s->lfe_index = dca_lfe_index[s->amode]; |
| 2401 | } else { |
| 2402 | av_log(avctx, AV_LOG_ERROR, |
| 2403 | "Non standard configuration %d !\n", s->amode); |
| 2404 | return AVERROR_INVALIDDATA; |
| 2405 | } |
| 2406 | |
| 2407 | s->xxch_dmix_embedded = 0; |
| 2408 | } else { |
| 2409 | /* we only get here if an XXCH channel set can be added to the mix */ |
| 2410 | channel_mask = s->xxch_core_spkmask; |
| 2411 | |
| 2412 | if (avctx->request_channels > 0 |
| 2413 | && avctx->request_channels < s->prim_channels) { |
| 2414 | channels = num_core_channels + !!s->lfe; |
| 2415 | for (i = 0; i < s->xxch_chset && channels + s->xxch_chset_nch[i] |
| 2416 | <= avctx->request_channels; i++) { |
| 2417 | channels += s->xxch_chset_nch[i]; |
| 2418 | channel_mask |= s->xxch_spk_masks[i]; |
| 2419 | } |
| 2420 | } else { |
| 2421 | channels = s->prim_channels + !!s->lfe; |
| 2422 | for (i = 0; i < s->xxch_chset; i++) { |
| 2423 | channel_mask |= s->xxch_spk_masks[i]; |
| 2424 | } |
| 2425 | } |
| 2426 | |
| 2427 | /* Given the DTS spec'ed channel mask, generate an avcodec version */ |
| 2428 | channel_layout = 0; |
| 2429 | for (i = 0; i < s->xxch_nbits_spk_mask; ++i) { |
| 2430 | if (channel_mask & (1 << i)) { |
| 2431 | channel_layout |= map_xxch_to_native[i]; |
| 2432 | } |
| 2433 | } |
| 2434 | |
| 2435 | /* make sure that we have managed to get equivalent dts/avcodec channel |
| 2436 | * masks in some sense -- unfortunately some channels could overlap */ |
| 2437 | if (av_popcount(channel_mask) != av_popcount(channel_layout)) { |
| 2438 | av_log(avctx, AV_LOG_DEBUG, |
| 2439 | "DTS-XXCH: Inconsistent avcodec/dts channel layouts\n"); |
| 2440 | return AVERROR_INVALIDDATA; |
| 2441 | } |
| 2442 | |
| 2443 | avctx->channel_layout = channel_layout; |
| 2444 | |
| 2445 | if (!(avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE)) { |
| 2446 | /* Estimate DTS --> avcodec ordering table */ |
| 2447 | for (chset = -1, j = 0; chset < s->xxch_chset; ++chset) { |
| 2448 | mask = chset >= 0 ? s->xxch_spk_masks[chset] |
| 2449 | : s->xxch_core_spkmask; |
| 2450 | for (i = 0; i < s->xxch_nbits_spk_mask; i++) { |
| 2451 | if (mask & ~(DCA_XXCH_LFE1 | DCA_XXCH_LFE2) & (1 << i)) { |
| 2452 | lavc = map_xxch_to_native[i]; |
| 2453 | posn = av_popcount(channel_layout & (lavc - 1)); |
| 2454 | s->xxch_order_tab[j++] = posn; |
| 2455 | } |
| 2456 | } |
| 2457 | |
| 2458 | } |
| 2459 | |
| 2460 | s->lfe_index = av_popcount(channel_layout & (AV_CH_LOW_FREQUENCY-1)); |
| 2461 | } else { /* native ordering */ |
| 2462 | for (i = 0; i < channels; i++) |
| 2463 | s->xxch_order_tab[i] = i; |
| 2464 | |
| 2465 | s->lfe_index = channels - 1; |
| 2466 | } |
| 2467 | |
| 2468 | s->channel_order_tab = s->xxch_order_tab; |
| 2469 | } |
| 2470 | |
| 2471 | if (avctx->channels != channels) { |
| 2472 | if (avctx->channels) |
| 2473 | av_log(avctx, AV_LOG_INFO, "Number of channels changed in DCA decoder (%d -> %d)\n", avctx->channels, channels); |
| 2474 | avctx->channels = channels; |
| 2475 | } |
| 2476 | |
| 2477 | /* get output buffer */ |
| 2478 | frame->nb_samples = 256 * (s->sample_blocks / 8); |
| 2479 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 2480 | return ret; |
| 2481 | samples_flt = (float **)frame->extended_data; |
| 2482 | |
| 2483 | /* allocate buffer for extra channels if downmixing */ |
| 2484 | if (avctx->channels < full_channels) { |
| 2485 | ret = av_samples_get_buffer_size(NULL, full_channels - channels, |
| 2486 | frame->nb_samples, |
| 2487 | avctx->sample_fmt, 0); |
| 2488 | if (ret < 0) |
| 2489 | return ret; |
| 2490 | |
| 2491 | av_fast_malloc(&s->extra_channels_buffer, |
| 2492 | &s->extra_channels_buffer_size, ret); |
| 2493 | if (!s->extra_channels_buffer) |
| 2494 | return AVERROR(ENOMEM); |
| 2495 | |
| 2496 | ret = av_samples_fill_arrays((uint8_t **)s->extra_channels, NULL, |
| 2497 | s->extra_channels_buffer, |
| 2498 | full_channels - channels, |
| 2499 | frame->nb_samples, avctx->sample_fmt, 0); |
| 2500 | if (ret < 0) |
| 2501 | return ret; |
| 2502 | } |
| 2503 | |
| 2504 | /* filter to get final output */ |
| 2505 | for (i = 0; i < (s->sample_blocks / 8); i++) { |
| 2506 | int ch; |
| 2507 | |
| 2508 | for (ch = 0; ch < channels; ch++) |
| 2509 | s->samples_chanptr[ch] = samples_flt[ch] + i * 256; |
| 2510 | for (; ch < full_channels; ch++) |
| 2511 | s->samples_chanptr[ch] = s->extra_channels[ch - channels] + i * 256; |
| 2512 | |
| 2513 | dca_filter_channels(s, i); |
| 2514 | |
| 2515 | /* If this was marked as a DTS-ES stream we need to subtract back- */ |
| 2516 | /* channel from SL & SR to remove matrixed back-channel signal */ |
| 2517 | if ((s->source_pcm_res & 1) && s->xch_present) { |
| 2518 | float *back_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel]]; |
| 2519 | float *lt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 2]]; |
| 2520 | float *rt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 1]]; |
| 2521 | s->fdsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256); |
| 2522 | s->fdsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256); |
| 2523 | } |
| 2524 | |
| 2525 | /* If stream contains XXCH, we might need to undo an embedded downmix */ |
| 2526 | if (s->xxch_dmix_embedded) { |
| 2527 | /* Loop over channel sets in turn */ |
| 2528 | ch = num_core_channels; |
| 2529 | for (chset = 0; chset < s->xxch_chset; chset++) { |
| 2530 | endch = ch + s->xxch_chset_nch[chset]; |
| 2531 | mask = s->xxch_dmix_embedded; |
| 2532 | |
| 2533 | /* undo downmix */ |
| 2534 | for (j = ch; j < endch; j++) { |
| 2535 | if (mask & (1 << j)) { /* this channel has been mixed-out */ |
| 2536 | src_chan = s->samples_chanptr[s->channel_order_tab[j]]; |
| 2537 | for (k = 0; k < endch; k++) { |
| 2538 | achan = s->channel_order_tab[k]; |
| 2539 | scale = s->xxch_dmix_coeff[j][k]; |
| 2540 | if (scale != 0.0) { |
| 2541 | dst_chan = s->samples_chanptr[achan]; |
| 2542 | s->fdsp.vector_fmac_scalar(dst_chan, src_chan, |
| 2543 | -scale, 256); |
| 2544 | } |
| 2545 | } |
| 2546 | } |
| 2547 | } |
| 2548 | |
| 2549 | /* if a downmix has been embedded then undo the pre-scaling */ |
| 2550 | if ((mask & (1 << ch)) && s->xxch_dmix_sf[chset] != 1.0f) { |
| 2551 | scale = s->xxch_dmix_sf[chset]; |
| 2552 | |
| 2553 | for (j = 0; j < ch; j++) { |
| 2554 | src_chan = s->samples_chanptr[s->channel_order_tab[j]]; |
| 2555 | for (k = 0; k < 256; k++) |
| 2556 | src_chan[k] *= scale; |
| 2557 | } |
| 2558 | |
| 2559 | /* LFE channel is always part of core, scale if it exists */ |
| 2560 | if (s->lfe) { |
| 2561 | src_chan = s->samples_chanptr[s->lfe_index]; |
| 2562 | for (k = 0; k < 256; k++) |
| 2563 | src_chan[k] *= scale; |
| 2564 | } |
| 2565 | } |
| 2566 | |
| 2567 | ch = endch; |
| 2568 | } |
| 2569 | |
| 2570 | } |
| 2571 | } |
| 2572 | |
| 2573 | /* update lfe history */ |
| 2574 | lfe_samples = 2 * s->lfe * (s->sample_blocks / 8); |
| 2575 | for (i = 0; i < 2 * s->lfe * 4; i++) |
| 2576 | s->lfe_data[i] = s->lfe_data[i + lfe_samples]; |
| 2577 | |
| 2578 | /* AVMatrixEncoding |
| 2579 | * |
| 2580 | * DCA_STEREO_TOTAL (Lt/Rt) is equivalent to Dolby Surround */ |
| 2581 | ret = ff_side_data_update_matrix_encoding(frame, |
| 2582 | (s->output & ~DCA_LFE) == DCA_STEREO_TOTAL ? |
| 2583 | AV_MATRIX_ENCODING_DOLBY : AV_MATRIX_ENCODING_NONE); |
| 2584 | if (ret < 0) |
| 2585 | return ret; |
| 2586 | |
| 2587 | *got_frame_ptr = 1; |
| 2588 | |
| 2589 | return buf_size; |
| 2590 | } |
| 2591 | |
| 2592 | |
| 2593 | |
| 2594 | /** |
| 2595 | * DCA initialization |
| 2596 | * |
| 2597 | * @param avctx pointer to the AVCodecContext |
| 2598 | */ |
| 2599 | |
| 2600 | static av_cold int dca_decode_init(AVCodecContext *avctx) |
| 2601 | { |
| 2602 | DCAContext *s = avctx->priv_data; |
| 2603 | |
| 2604 | s->avctx = avctx; |
| 2605 | dca_init_vlcs(); |
| 2606 | |
| 2607 | avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT); |
| 2608 | ff_mdct_init(&s->imdct, 6, 1, 1.0); |
| 2609 | ff_synth_filter_init(&s->synth); |
| 2610 | ff_dcadsp_init(&s->dcadsp); |
| 2611 | ff_fmt_convert_init(&s->fmt_conv, avctx); |
| 2612 | |
| 2613 | avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; |
| 2614 | |
| 2615 | /* allow downmixing to stereo */ |
| 2616 | #if FF_API_REQUEST_CHANNELS |
| 2617 | FF_DISABLE_DEPRECATION_WARNINGS |
| 2618 | if (avctx->request_channels == 2) |
| 2619 | avctx->request_channel_layout = AV_CH_LAYOUT_STEREO; |
| 2620 | FF_ENABLE_DEPRECATION_WARNINGS |
| 2621 | #endif |
| 2622 | if (avctx->channels > 2 && |
| 2623 | avctx->request_channel_layout == AV_CH_LAYOUT_STEREO) |
| 2624 | avctx->channels = 2; |
| 2625 | |
| 2626 | return 0; |
| 2627 | } |
| 2628 | |
| 2629 | static av_cold int dca_decode_end(AVCodecContext *avctx) |
| 2630 | { |
| 2631 | DCAContext *s = avctx->priv_data; |
| 2632 | ff_mdct_end(&s->imdct); |
| 2633 | av_freep(&s->extra_channels_buffer); |
| 2634 | return 0; |
| 2635 | } |
| 2636 | |
| 2637 | static const AVProfile profiles[] = { |
| 2638 | { FF_PROFILE_DTS, "DTS" }, |
| 2639 | { FF_PROFILE_DTS_ES, "DTS-ES" }, |
| 2640 | { FF_PROFILE_DTS_96_24, "DTS 96/24" }, |
| 2641 | { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" }, |
| 2642 | { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" }, |
| 2643 | { FF_PROFILE_UNKNOWN }, |
| 2644 | }; |
| 2645 | |
| 2646 | static const AVOption options[] = { |
| 2647 | { "disable_xch", "disable decoding of the XCh extension", offsetof(DCAContext, xch_disable), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_AUDIO_PARAM }, |
| 2648 | { NULL }, |
| 2649 | }; |
| 2650 | |
| 2651 | static const AVClass dca_decoder_class = { |
| 2652 | .class_name = "DCA decoder", |
| 2653 | .item_name = av_default_item_name, |
| 2654 | .option = options, |
| 2655 | .version = LIBAVUTIL_VERSION_INT, |
| 2656 | .category = AV_CLASS_CATEGORY_DECODER, |
| 2657 | }; |
| 2658 | |
| 2659 | AVCodec ff_dca_decoder = { |
| 2660 | .name = "dca", |
| 2661 | .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"), |
| 2662 | .type = AVMEDIA_TYPE_AUDIO, |
| 2663 | .id = AV_CODEC_ID_DTS, |
| 2664 | .priv_data_size = sizeof(DCAContext), |
| 2665 | .init = dca_decode_init, |
| 2666 | .decode = dca_decode_frame, |
| 2667 | .close = dca_decode_end, |
| 2668 | .capabilities = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1, |
| 2669 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
| 2670 | AV_SAMPLE_FMT_NONE }, |
| 2671 | .profiles = NULL_IF_CONFIG_SMALL(profiles), |
| 2672 | .priv_class = &dca_decoder_class, |
| 2673 | }; |