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
8 * This file is part of Libav.
10 * Libav 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.
15 * Libav 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.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with Libav; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/samplefmt.h"
44 #include "synth_filter.h"
46 #include "fmtconvert.h"
55 #define DCA_PRIM_CHANNELS_MAX (7)
56 #define DCA_SUBBANDS (32)
57 #define DCA_ABITS_MAX (32) /* Should be 28 */
58 #define DCA_SUBSUBFRAMES_MAX (4)
59 #define DCA_SUBFRAMES_MAX (16)
60 #define DCA_BLOCKS_MAX (16)
61 #define DCA_LFE_MAX (3)
77 /* these are unconfirmed but should be mostly correct */
78 enum DCAExSSSpeakerMask {
79 DCA_EXSS_FRONT_CENTER = 0x0001,
80 DCA_EXSS_FRONT_LEFT_RIGHT = 0x0002,
81 DCA_EXSS_SIDE_REAR_LEFT_RIGHT = 0x0004,
82 DCA_EXSS_LFE = 0x0008,
83 DCA_EXSS_REAR_CENTER = 0x0010,
84 DCA_EXSS_FRONT_HIGH_LEFT_RIGHT = 0x0020,
85 DCA_EXSS_REAR_LEFT_RIGHT = 0x0040,
86 DCA_EXSS_FRONT_HIGH_CENTER = 0x0080,
87 DCA_EXSS_OVERHEAD = 0x0100,
88 DCA_EXSS_CENTER_LEFT_RIGHT = 0x0200,
89 DCA_EXSS_WIDE_LEFT_RIGHT = 0x0400,
90 DCA_EXSS_SIDE_LEFT_RIGHT = 0x0800,
91 DCA_EXSS_LFE2 = 0x1000,
92 DCA_EXSS_SIDE_HIGH_LEFT_RIGHT = 0x2000,
93 DCA_EXSS_REAR_HIGH_CENTER = 0x4000,
94 DCA_EXSS_REAR_HIGH_LEFT_RIGHT = 0x8000,
97 enum DCAExtensionMask {
98 DCA_EXT_CORE = 0x001, ///< core in core substream
99 DCA_EXT_XXCH = 0x002, ///< XXCh channels extension in core substream
100 DCA_EXT_X96 = 0x004, ///< 96/24 extension in core substream
101 DCA_EXT_XCH = 0x008, ///< XCh channel extension in core substream
102 DCA_EXT_EXSS_CORE = 0x010, ///< core in ExSS (extension substream)
103 DCA_EXT_EXSS_XBR = 0x020, ///< extended bitrate extension in ExSS
104 DCA_EXT_EXSS_XXCH = 0x040, ///< XXCh channels extension in ExSS
105 DCA_EXT_EXSS_X96 = 0x080, ///< 96/24 extension in ExSS
106 DCA_EXT_EXSS_LBR = 0x100, ///< low bitrate component in ExSS
107 DCA_EXT_EXSS_XLL = 0x200, ///< lossless extension in ExSS
110 /* -1 are reserved or unknown */
111 static const int dca_ext_audio_descr_mask[] = {
115 DCA_EXT_XCH | DCA_EXT_X96,
122 /* extensions that reside in core substream */
123 #define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)
125 /* Tables for mapping dts channel configurations to libavcodec multichannel api.
126 * Some compromises have been made for special configurations. Most configurations
127 * are never used so complete accuracy is not needed.
129 * L = left, R = right, C = center, S = surround, F = front, R = rear, T = total, OV = overhead.
130 * S -> side, when both rear and back are configured move one of them to the side channel
132 * All 2 channel configurations -> AV_CH_LAYOUT_STEREO
134 static const uint64_t dca_core_channel_layout[] = {
135 AV_CH_FRONT_CENTER, ///< 1, A
136 AV_CH_LAYOUT_STEREO, ///< 2, A + B (dual mono)
137 AV_CH_LAYOUT_STEREO, ///< 2, L + R (stereo)
138 AV_CH_LAYOUT_STEREO, ///< 2, (L + R) + (L - R) (sum-difference)
139 AV_CH_LAYOUT_STEREO, ///< 2, LT + RT (left and right total)
140 AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER, ///< 3, C + L + R
141 AV_CH_LAYOUT_STEREO | AV_CH_BACK_CENTER, ///< 3, L + R + S
142 AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 4, C + L + R + S
143 AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 4, L + R + SL + SR
145 AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_SIDE_LEFT |
146 AV_CH_SIDE_RIGHT, ///< 5, C + L + R + SL + SR
148 AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT |
149 AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER, ///< 6, CL + CR + L + R + SL + SR
151 AV_CH_LAYOUT_STEREO | AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT |
152 AV_CH_FRONT_CENTER | AV_CH_BACK_CENTER, ///< 6, C + L + R + LR + RR + OV
154 AV_CH_FRONT_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER |
155 AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_BACK_CENTER |
156 AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 6, CF + CR + LF + RF + LR + RR
158 AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER |
159 AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO |
160 AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT, ///< 7, CL + C + CR + L + R + SL + SR
162 AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER |
163 AV_CH_LAYOUT_STEREO | AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT |
164 AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT, ///< 8, CL + CR + L + R + SL1 + SL2 + SR1 + SR2
166 AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_CENTER |
167 AV_CH_FRONT_RIGHT_OF_CENTER | AV_CH_LAYOUT_STEREO |
168 AV_CH_SIDE_LEFT | AV_CH_BACK_CENTER | AV_CH_SIDE_RIGHT, ///< 8, CL + C + CR + L + R + SL + S + SR
171 static const int8_t dca_lfe_index[] = {
172 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3
175 static const int8_t dca_channel_reorder_lfe[][9] = {
176 { 0, -1, -1, -1, -1, -1, -1, -1, -1},
177 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
178 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
179 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
180 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
181 { 2, 0, 1, -1, -1, -1, -1, -1, -1},
182 { 0, 1, 3, -1, -1, -1, -1, -1, -1},
183 { 2, 0, 1, 4, -1, -1, -1, -1, -1},
184 { 0, 1, 3, 4, -1, -1, -1, -1, -1},
185 { 2, 0, 1, 4, 5, -1, -1, -1, -1},
186 { 3, 4, 0, 1, 5, 6, -1, -1, -1},
187 { 2, 0, 1, 4, 5, 6, -1, -1, -1},
188 { 0, 6, 4, 5, 2, 3, -1, -1, -1},
189 { 4, 2, 5, 0, 1, 6, 7, -1, -1},
190 { 5, 6, 0, 1, 7, 3, 8, 4, -1},
191 { 4, 2, 5, 0, 1, 6, 8, 7, -1},
194 static const int8_t dca_channel_reorder_lfe_xch[][9] = {
195 { 0, 2, -1, -1, -1, -1, -1, -1, -1},
196 { 0, 1, 3, -1, -1, -1, -1, -1, -1},
197 { 0, 1, 3, -1, -1, -1, -1, -1, -1},
198 { 0, 1, 3, -1, -1, -1, -1, -1, -1},
199 { 0, 1, 3, -1, -1, -1, -1, -1, -1},
200 { 2, 0, 1, 4, -1, -1, -1, -1, -1},
201 { 0, 1, 3, 4, -1, -1, -1, -1, -1},
202 { 2, 0, 1, 4, 5, -1, -1, -1, -1},
203 { 0, 1, 4, 5, 3, -1, -1, -1, -1},
204 { 2, 0, 1, 5, 6, 4, -1, -1, -1},
205 { 3, 4, 0, 1, 6, 7, 5, -1, -1},
206 { 2, 0, 1, 4, 5, 6, 7, -1, -1},
207 { 0, 6, 4, 5, 2, 3, 7, -1, -1},
208 { 4, 2, 5, 0, 1, 7, 8, 6, -1},
209 { 5, 6, 0, 1, 8, 3, 9, 4, 7},
210 { 4, 2, 5, 0, 1, 6, 9, 8, 7},
213 static const int8_t dca_channel_reorder_nolfe[][9] = {
214 { 0, -1, -1, -1, -1, -1, -1, -1, -1},
215 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
216 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
217 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
218 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
219 { 2, 0, 1, -1, -1, -1, -1, -1, -1},
220 { 0, 1, 2, -1, -1, -1, -1, -1, -1},
221 { 2, 0, 1, 3, -1, -1, -1, -1, -1},
222 { 0, 1, 2, 3, -1, -1, -1, -1, -1},
223 { 2, 0, 1, 3, 4, -1, -1, -1, -1},
224 { 2, 3, 0, 1, 4, 5, -1, -1, -1},
225 { 2, 0, 1, 3, 4, 5, -1, -1, -1},
226 { 0, 5, 3, 4, 1, 2, -1, -1, -1},
227 { 3, 2, 4, 0, 1, 5, 6, -1, -1},
228 { 4, 5, 0, 1, 6, 2, 7, 3, -1},
229 { 3, 2, 4, 0, 1, 5, 7, 6, -1},
232 static const int8_t dca_channel_reorder_nolfe_xch[][9] = {
233 { 0, 1, -1, -1, -1, -1, -1, -1, -1},
234 { 0, 1, 2, -1, -1, -1, -1, -1, -1},
235 { 0, 1, 2, -1, -1, -1, -1, -1, -1},
236 { 0, 1, 2, -1, -1, -1, -1, -1, -1},
237 { 0, 1, 2, -1, -1, -1, -1, -1, -1},
238 { 2, 0, 1, 3, -1, -1, -1, -1, -1},
239 { 0, 1, 2, 3, -1, -1, -1, -1, -1},
240 { 2, 0, 1, 3, 4, -1, -1, -1, -1},
241 { 0, 1, 3, 4, 2, -1, -1, -1, -1},
242 { 2, 0, 1, 4, 5, 3, -1, -1, -1},
243 { 2, 3, 0, 1, 5, 6, 4, -1, -1},
244 { 2, 0, 1, 3, 4, 5, 6, -1, -1},
245 { 0, 5, 3, 4, 1, 2, 6, -1, -1},
246 { 3, 2, 4, 0, 1, 6, 7, 5, -1},
247 { 4, 5, 0, 1, 7, 2, 8, 3, 6},
248 { 3, 2, 4, 0, 1, 5, 8, 7, 6},
251 #define DCA_DOLBY 101 /* FIXME */
253 #define DCA_CHANNEL_BITS 6
254 #define DCA_CHANNEL_MASK 0x3F
258 #define HEADER_SIZE 14
260 #define DCA_MAX_FRAME_SIZE 16384
261 #define DCA_MAX_EXSS_HEADER_SIZE 4096
263 #define DCA_BUFFER_PADDING_SIZE 1024
265 /** Bit allocation */
267 int offset; ///< code values offset
268 int maxbits[8]; ///< max bits in VLC
269 int wrap; ///< wrap for get_vlc2()
270 VLC vlc[8]; ///< actual codes
273 static BitAlloc dca_bitalloc_index; ///< indexes for samples VLC select
274 static BitAlloc dca_tmode; ///< transition mode VLCs
275 static BitAlloc dca_scalefactor; ///< scalefactor VLCs
276 static BitAlloc dca_smpl_bitalloc[11]; ///< samples VLCs
278 static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba,
281 return get_vlc2(gb, ba->vlc[idx].table, ba->vlc[idx].bits, ba->wrap) +
286 AVCodecContext *avctx;
288 int frame_type; ///< type of the current frame
289 int samples_deficit; ///< deficit sample count
290 int crc_present; ///< crc is present in the bitstream
291 int sample_blocks; ///< number of PCM sample blocks
292 int frame_size; ///< primary frame byte size
293 int amode; ///< audio channels arrangement
294 int sample_rate; ///< audio sampling rate
295 int bit_rate; ///< transmission bit rate
296 int bit_rate_index; ///< transmission bit rate index
298 int downmix; ///< embedded downmix enabled
299 int dynrange; ///< embedded dynamic range flag
300 int timestamp; ///< embedded time stamp flag
301 int aux_data; ///< auxiliary data flag
302 int hdcd; ///< source material is mastered in HDCD
303 int ext_descr; ///< extension audio descriptor flag
304 int ext_coding; ///< extended coding flag
305 int aspf; ///< audio sync word insertion flag
306 int lfe; ///< low frequency effects flag
307 int predictor_history; ///< predictor history flag
308 int header_crc; ///< header crc check bytes
309 int multirate_inter; ///< multirate interpolator switch
310 int version; ///< encoder software revision
311 int copy_history; ///< copy history
312 int source_pcm_res; ///< source pcm resolution
313 int front_sum; ///< front sum/difference flag
314 int surround_sum; ///< surround sum/difference flag
315 int dialog_norm; ///< dialog normalisation parameter
317 /* Primary audio coding header */
318 int subframes; ///< number of subframes
319 int total_channels; ///< number of channels including extensions
320 int prim_channels; ///< number of primary audio channels
321 int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count
322 int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband
323 int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index
324 int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book
325 int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book
326 int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select
327 int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select
328 float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment
330 /* Primary audio coding side information */
331 int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes
332 int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count
333 int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not)
334 int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs
335 int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index
336 int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients)
337 int scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]; ///< scale factors (2 if transient)
338 int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook
339 int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors
340 int downmix_coef[DCA_PRIM_CHANNELS_MAX][2]; ///< stereo downmix coefficients
341 int dynrange_coef; ///< dynamic range coefficient
343 int high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands
345 float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data
346 int lfe_scale_factor;
348 /* Subband samples history (for ADPCM) */
349 DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4];
350 DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512];
351 DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32];
352 int hist_index[DCA_PRIM_CHANNELS_MAX];
353 DECLARE_ALIGNED(32, float, raXin)[32];
355 int output; ///< type of output
357 DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8];
358 float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1];
359 float *extra_channels[DCA_PRIM_CHANNELS_MAX + 1];
360 uint8_t *extra_channels_buffer;
361 unsigned int extra_channels_buffer_size;
363 uint8_t dca_buffer[DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE + DCA_BUFFER_PADDING_SIZE];
364 int dca_buffer_size; ///< how much data is in the dca_buffer
366 const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe
368 /* Current position in DCA frame */
369 int current_subframe;
370 int current_subsubframe;
372 int core_ext_mask; ///< present extensions in the core substream
374 /* XCh extension information */
375 int xch_present; ///< XCh extension present and valid
376 int xch_base_channel; ///< index of first (only) channel containing XCH data
378 /* ExSS header parser */
379 int static_fields; ///< static fields present
380 int mix_metadata; ///< mixing metadata present
381 int num_mix_configs; ///< number of mix out configurations
382 int mix_config_num_ch[4]; ///< number of channels in each mix out configuration
386 int debug_flag; ///< used for suppressing repeated error messages output
387 AVFloatDSPContext fdsp;
389 SynthFilterContext synth;
390 DCADSPContext dcadsp;
391 FmtConvertContext fmt_conv;
394 static const uint16_t dca_vlc_offs[] = {
395 0, 512, 640, 768, 1282, 1794, 2436, 3080, 3770, 4454, 5364,
396 5372, 5380, 5388, 5392, 5396, 5412, 5420, 5428, 5460, 5492, 5508,
397 5572, 5604, 5668, 5796, 5860, 5892, 6412, 6668, 6796, 7308, 7564,
398 7820, 8076, 8620, 9132, 9388, 9910, 10166, 10680, 11196, 11726, 12240,
399 12752, 13298, 13810, 14326, 14840, 15500, 16022, 16540, 17158, 17678, 18264,
400 18796, 19352, 19926, 20468, 21472, 22398, 23014, 23622,
403 static av_cold void dca_init_vlcs(void)
405 static int vlcs_initialized = 0;
407 static VLC_TYPE dca_table[23622][2];
409 if (vlcs_initialized)
412 dca_bitalloc_index.offset = 1;
413 dca_bitalloc_index.wrap = 2;
414 for (i = 0; i < 5; i++) {
415 dca_bitalloc_index.vlc[i].table = &dca_table[dca_vlc_offs[i]];
416 dca_bitalloc_index.vlc[i].table_allocated = dca_vlc_offs[i + 1] - dca_vlc_offs[i];
417 init_vlc(&dca_bitalloc_index.vlc[i], bitalloc_12_vlc_bits[i], 12,
418 bitalloc_12_bits[i], 1, 1,
419 bitalloc_12_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
421 dca_scalefactor.offset = -64;
422 dca_scalefactor.wrap = 2;
423 for (i = 0; i < 5; i++) {
424 dca_scalefactor.vlc[i].table = &dca_table[dca_vlc_offs[i + 5]];
425 dca_scalefactor.vlc[i].table_allocated = dca_vlc_offs[i + 6] - dca_vlc_offs[i + 5];
426 init_vlc(&dca_scalefactor.vlc[i], SCALES_VLC_BITS, 129,
427 scales_bits[i], 1, 1,
428 scales_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
430 dca_tmode.offset = 0;
432 for (i = 0; i < 4; i++) {
433 dca_tmode.vlc[i].table = &dca_table[dca_vlc_offs[i + 10]];
434 dca_tmode.vlc[i].table_allocated = dca_vlc_offs[i + 11] - dca_vlc_offs[i + 10];
435 init_vlc(&dca_tmode.vlc[i], tmode_vlc_bits[i], 4,
437 tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
440 for (i = 0; i < 10; i++)
441 for (j = 0; j < 7; j++) {
442 if (!bitalloc_codes[i][j])
444 dca_smpl_bitalloc[i + 1].offset = bitalloc_offsets[i];
445 dca_smpl_bitalloc[i + 1].wrap = 1 + (j > 4);
446 dca_smpl_bitalloc[i + 1].vlc[j].table = &dca_table[dca_vlc_offs[c]];
447 dca_smpl_bitalloc[i + 1].vlc[j].table_allocated = dca_vlc_offs[c + 1] - dca_vlc_offs[c];
449 init_vlc(&dca_smpl_bitalloc[i + 1].vlc[j], bitalloc_maxbits[i][j],
451 bitalloc_bits[i][j], 1, 1,
452 bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
455 vlcs_initialized = 1;
458 static inline void get_array(GetBitContext *gb, int *dst, int len, int bits)
461 *dst++ = get_bits(gb, bits);
464 static int dca_parse_audio_coding_header(DCAContext *s, int base_channel)
467 static const float adj_table[4] = { 1.0, 1.1250, 1.2500, 1.4375 };
468 static const int bitlen[11] = { 0, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3 };
469 static const int thr[11] = { 0, 1, 3, 3, 3, 3, 7, 7, 7, 7, 7 };
471 s->total_channels = get_bits(&s->gb, 3) + 1 + base_channel;
472 s->prim_channels = s->total_channels;
474 if (s->prim_channels > DCA_PRIM_CHANNELS_MAX)
475 s->prim_channels = DCA_PRIM_CHANNELS_MAX;
478 for (i = base_channel; i < s->prim_channels; i++) {
479 s->subband_activity[i] = get_bits(&s->gb, 5) + 2;
480 if (s->subband_activity[i] > DCA_SUBBANDS)
481 s->subband_activity[i] = DCA_SUBBANDS;
483 for (i = base_channel; i < s->prim_channels; i++) {
484 s->vq_start_subband[i] = get_bits(&s->gb, 5) + 1;
485 if (s->vq_start_subband[i] > DCA_SUBBANDS)
486 s->vq_start_subband[i] = DCA_SUBBANDS;
488 get_array(&s->gb, s->joint_intensity + base_channel, s->prim_channels - base_channel, 3);
489 get_array(&s->gb, s->transient_huffman + base_channel, s->prim_channels - base_channel, 2);
490 get_array(&s->gb, s->scalefactor_huffman + base_channel, s->prim_channels - base_channel, 3);
491 get_array(&s->gb, s->bitalloc_huffman + base_channel, s->prim_channels - base_channel, 3);
493 /* Get codebooks quantization indexes */
495 memset(s->quant_index_huffman, 0, sizeof(s->quant_index_huffman));
496 for (j = 1; j < 11; j++)
497 for (i = base_channel; i < s->prim_channels; i++)
498 s->quant_index_huffman[i][j] = get_bits(&s->gb, bitlen[j]);
500 /* Get scale factor adjustment */
501 for (j = 0; j < 11; j++)
502 for (i = base_channel; i < s->prim_channels; i++)
503 s->scalefactor_adj[i][j] = 1;
505 for (j = 1; j < 11; j++)
506 for (i = base_channel; i < s->prim_channels; i++)
507 if (s->quant_index_huffman[i][j] < thr[j])
508 s->scalefactor_adj[i][j] = adj_table[get_bits(&s->gb, 2)];
510 if (s->crc_present) {
511 /* Audio header CRC check */
512 get_bits(&s->gb, 16);
515 s->current_subframe = 0;
516 s->current_subsubframe = 0;
519 av_log(s->avctx, AV_LOG_DEBUG, "subframes: %i\n", s->subframes);
520 av_log(s->avctx, AV_LOG_DEBUG, "prim channels: %i\n", s->prim_channels);
521 for (i = base_channel; i < s->prim_channels; i++) {
522 av_log(s->avctx, AV_LOG_DEBUG, "subband activity: %i\n",
523 s->subband_activity[i]);
524 av_log(s->avctx, AV_LOG_DEBUG, "vq start subband: %i\n",
525 s->vq_start_subband[i]);
526 av_log(s->avctx, AV_LOG_DEBUG, "joint intensity: %i\n",
527 s->joint_intensity[i]);
528 av_log(s->avctx, AV_LOG_DEBUG, "transient mode codebook: %i\n",
529 s->transient_huffman[i]);
530 av_log(s->avctx, AV_LOG_DEBUG, "scale factor codebook: %i\n",
531 s->scalefactor_huffman[i]);
532 av_log(s->avctx, AV_LOG_DEBUG, "bit allocation quantizer: %i\n",
533 s->bitalloc_huffman[i]);
534 av_log(s->avctx, AV_LOG_DEBUG, "quant index huff:");
535 for (j = 0; j < 11; j++)
536 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->quant_index_huffman[i][j]);
537 av_log(s->avctx, AV_LOG_DEBUG, "\n");
538 av_log(s->avctx, AV_LOG_DEBUG, "scalefac adj:");
539 for (j = 0; j < 11; j++)
540 av_log(s->avctx, AV_LOG_DEBUG, " %1.3f", s->scalefactor_adj[i][j]);
541 av_log(s->avctx, AV_LOG_DEBUG, "\n");
548 static int dca_parse_frame_header(DCAContext *s)
550 init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8);
553 skip_bits_long(&s->gb, 32);
556 s->frame_type = get_bits(&s->gb, 1);
557 s->samples_deficit = get_bits(&s->gb, 5) + 1;
558 s->crc_present = get_bits(&s->gb, 1);
559 s->sample_blocks = get_bits(&s->gb, 7) + 1;
560 s->frame_size = get_bits(&s->gb, 14) + 1;
561 if (s->frame_size < 95)
562 return AVERROR_INVALIDDATA;
563 s->amode = get_bits(&s->gb, 6);
564 s->sample_rate = avpriv_dca_sample_rates[get_bits(&s->gb, 4)];
566 return AVERROR_INVALIDDATA;
567 s->bit_rate_index = get_bits(&s->gb, 5);
568 s->bit_rate = dca_bit_rates[s->bit_rate_index];
570 return AVERROR_INVALIDDATA;
572 s->downmix = get_bits(&s->gb, 1);
573 s->dynrange = get_bits(&s->gb, 1);
574 s->timestamp = get_bits(&s->gb, 1);
575 s->aux_data = get_bits(&s->gb, 1);
576 s->hdcd = get_bits(&s->gb, 1);
577 s->ext_descr = get_bits(&s->gb, 3);
578 s->ext_coding = get_bits(&s->gb, 1);
579 s->aspf = get_bits(&s->gb, 1);
580 s->lfe = get_bits(&s->gb, 2);
581 s->predictor_history = get_bits(&s->gb, 1);
583 /* TODO: check CRC */
585 s->header_crc = get_bits(&s->gb, 16);
587 s->multirate_inter = get_bits(&s->gb, 1);
588 s->version = get_bits(&s->gb, 4);
589 s->copy_history = get_bits(&s->gb, 2);
590 s->source_pcm_res = get_bits(&s->gb, 3);
591 s->front_sum = get_bits(&s->gb, 1);
592 s->surround_sum = get_bits(&s->gb, 1);
593 s->dialog_norm = get_bits(&s->gb, 4);
595 /* FIXME: channels mixing levels */
596 s->output = s->amode;
598 s->output |= DCA_LFE;
601 av_log(s->avctx, AV_LOG_DEBUG, "frame type: %i\n", s->frame_type);
602 av_log(s->avctx, AV_LOG_DEBUG, "samples deficit: %i\n", s->samples_deficit);
603 av_log(s->avctx, AV_LOG_DEBUG, "crc present: %i\n", s->crc_present);
604 av_log(s->avctx, AV_LOG_DEBUG, "sample blocks: %i (%i samples)\n",
605 s->sample_blocks, s->sample_blocks * 32);
606 av_log(s->avctx, AV_LOG_DEBUG, "frame size: %i bytes\n", s->frame_size);
607 av_log(s->avctx, AV_LOG_DEBUG, "amode: %i (%i channels)\n",
608 s->amode, dca_channels[s->amode]);
609 av_log(s->avctx, AV_LOG_DEBUG, "sample rate: %i Hz\n",
611 av_log(s->avctx, AV_LOG_DEBUG, "bit rate: %i bits/s\n",
613 av_log(s->avctx, AV_LOG_DEBUG, "downmix: %i\n", s->downmix);
614 av_log(s->avctx, AV_LOG_DEBUG, "dynrange: %i\n", s->dynrange);
615 av_log(s->avctx, AV_LOG_DEBUG, "timestamp: %i\n", s->timestamp);
616 av_log(s->avctx, AV_LOG_DEBUG, "aux_data: %i\n", s->aux_data);
617 av_log(s->avctx, AV_LOG_DEBUG, "hdcd: %i\n", s->hdcd);
618 av_log(s->avctx, AV_LOG_DEBUG, "ext descr: %i\n", s->ext_descr);
619 av_log(s->avctx, AV_LOG_DEBUG, "ext coding: %i\n", s->ext_coding);
620 av_log(s->avctx, AV_LOG_DEBUG, "aspf: %i\n", s->aspf);
621 av_log(s->avctx, AV_LOG_DEBUG, "lfe: %i\n", s->lfe);
622 av_log(s->avctx, AV_LOG_DEBUG, "predictor history: %i\n",
623 s->predictor_history);
624 av_log(s->avctx, AV_LOG_DEBUG, "header crc: %i\n", s->header_crc);
625 av_log(s->avctx, AV_LOG_DEBUG, "multirate inter: %i\n",
627 av_log(s->avctx, AV_LOG_DEBUG, "version number: %i\n", s->version);
628 av_log(s->avctx, AV_LOG_DEBUG, "copy history: %i\n", s->copy_history);
629 av_log(s->avctx, AV_LOG_DEBUG,
630 "source pcm resolution: %i (%i bits/sample)\n",
631 s->source_pcm_res, dca_bits_per_sample[s->source_pcm_res]);
632 av_log(s->avctx, AV_LOG_DEBUG, "front sum: %i\n", s->front_sum);
633 av_log(s->avctx, AV_LOG_DEBUG, "surround sum: %i\n", s->surround_sum);
634 av_log(s->avctx, AV_LOG_DEBUG, "dialog norm: %i\n", s->dialog_norm);
635 av_log(s->avctx, AV_LOG_DEBUG, "\n");
638 /* Primary audio coding header */
639 s->subframes = get_bits(&s->gb, 4) + 1;
641 return dca_parse_audio_coding_header(s, 0);
645 static inline int get_scale(GetBitContext *gb, int level, int value, int log2range)
648 /* huffman encoded */
649 value += get_bitalloc(gb, &dca_scalefactor, level);
650 value = av_clip(value, 0, (1 << log2range) - 1);
651 } else if (level < 8) {
652 if (level + 1 > log2range) {
653 skip_bits(gb, level + 1 - log2range);
654 value = get_bits(gb, log2range);
656 value = get_bits(gb, level + 1);
662 static int dca_subframe_header(DCAContext *s, int base_channel, int block_index)
664 /* Primary audio coding side information */
667 if (get_bits_left(&s->gb) < 0)
668 return AVERROR_INVALIDDATA;
671 s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1;
672 s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3);
675 for (j = base_channel; j < s->prim_channels; j++) {
676 for (k = 0; k < s->subband_activity[j]; k++)
677 s->prediction_mode[j][k] = get_bits(&s->gb, 1);
680 /* Get prediction codebook */
681 for (j = base_channel; j < s->prim_channels; j++) {
682 for (k = 0; k < s->subband_activity[j]; k++) {
683 if (s->prediction_mode[j][k] > 0) {
684 /* (Prediction coefficient VQ address) */
685 s->prediction_vq[j][k] = get_bits(&s->gb, 12);
690 /* Bit allocation index */
691 for (j = base_channel; j < s->prim_channels; j++) {
692 for (k = 0; k < s->vq_start_subband[j]; k++) {
693 if (s->bitalloc_huffman[j] == 6)
694 s->bitalloc[j][k] = get_bits(&s->gb, 5);
695 else if (s->bitalloc_huffman[j] == 5)
696 s->bitalloc[j][k] = get_bits(&s->gb, 4);
697 else if (s->bitalloc_huffman[j] == 7) {
698 av_log(s->avctx, AV_LOG_ERROR,
699 "Invalid bit allocation index\n");
700 return AVERROR_INVALIDDATA;
703 get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]);
706 if (s->bitalloc[j][k] > 26) {
707 av_dlog(s->avctx, "bitalloc index [%i][%i] too big (%i)\n",
708 j, k, s->bitalloc[j][k]);
709 return AVERROR_INVALIDDATA;
714 /* Transition mode */
715 for (j = base_channel; j < s->prim_channels; j++) {
716 for (k = 0; k < s->subband_activity[j]; k++) {
717 s->transition_mode[j][k] = 0;
718 if (s->subsubframes[s->current_subframe] > 1 &&
719 k < s->vq_start_subband[j] && s->bitalloc[j][k] > 0) {
720 s->transition_mode[j][k] =
721 get_bitalloc(&s->gb, &dca_tmode, s->transient_huffman[j]);
726 if (get_bits_left(&s->gb) < 0)
727 return AVERROR_INVALIDDATA;
729 for (j = base_channel; j < s->prim_channels; j++) {
730 const uint32_t *scale_table;
731 int scale_sum, log_size;
733 memset(s->scale_factor[j], 0,
734 s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2);
736 if (s->scalefactor_huffman[j] == 6) {
737 scale_table = scale_factor_quant7;
740 scale_table = scale_factor_quant6;
744 /* When huffman coded, only the difference is encoded */
747 for (k = 0; k < s->subband_activity[j]; k++) {
748 if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0) {
749 scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size);
750 s->scale_factor[j][k][0] = scale_table[scale_sum];
753 if (k < s->vq_start_subband[j] && s->transition_mode[j][k]) {
754 /* Get second scale factor */
755 scale_sum = get_scale(&s->gb, s->scalefactor_huffman[j], scale_sum, log_size);
756 s->scale_factor[j][k][1] = scale_table[scale_sum];
761 /* Joint subband scale factor codebook select */
762 for (j = base_channel; j < s->prim_channels; j++) {
763 /* Transmitted only if joint subband coding enabled */
764 if (s->joint_intensity[j] > 0)
765 s->joint_huff[j] = get_bits(&s->gb, 3);
768 if (get_bits_left(&s->gb) < 0)
769 return AVERROR_INVALIDDATA;
771 /* Scale factors for joint subband coding */
772 for (j = base_channel; j < s->prim_channels; j++) {
775 /* Transmitted only if joint subband coding enabled */
776 if (s->joint_intensity[j] > 0) {
778 source_channel = s->joint_intensity[j] - 1;
780 /* When huffman coded, only the difference is encoded
781 * (is this valid as well for joint scales ???) */
783 for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++) {
784 scale = get_scale(&s->gb, s->joint_huff[j], 64 /* bias */, 7);
785 s->joint_scale_factor[j][k] = scale; /*joint_scale_table[scale]; */
788 if (!(s->debug_flag & 0x02)) {
789 av_log(s->avctx, AV_LOG_DEBUG,
790 "Joint stereo coding not supported\n");
791 s->debug_flag |= 0x02;
796 /* Stereo downmix coefficients */
797 if (!base_channel && s->prim_channels > 2) {
799 for (j = base_channel; j < s->prim_channels; j++) {
800 s->downmix_coef[j][0] = get_bits(&s->gb, 7);
801 s->downmix_coef[j][1] = get_bits(&s->gb, 7);
804 int am = s->amode & DCA_CHANNEL_MASK;
805 if (am >= FF_ARRAY_ELEMS(dca_default_coeffs)) {
806 av_log(s->avctx, AV_LOG_ERROR,
807 "Invalid channel mode %d\n", am);
808 return AVERROR_INVALIDDATA;
810 if (s->prim_channels > FF_ARRAY_ELEMS(dca_default_coeffs[0])) {
811 avpriv_request_sample(s->avctx, "Downmixing %d channels",
813 return AVERROR_PATCHWELCOME;
816 for (j = base_channel; j < s->prim_channels; j++) {
817 s->downmix_coef[j][0] = dca_default_coeffs[am][j][0];
818 s->downmix_coef[j][1] = dca_default_coeffs[am][j][1];
823 /* Dynamic range coefficient */
824 if (!base_channel && s->dynrange)
825 s->dynrange_coef = get_bits(&s->gb, 8);
827 /* Side information CRC check word */
828 if (s->crc_present) {
829 get_bits(&s->gb, 16);
833 * Primary audio data arrays
836 /* VQ encoded high frequency subbands */
837 for (j = base_channel; j < s->prim_channels; j++)
838 for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++)
839 /* 1 vector -> 32 samples */
840 s->high_freq_vq[j][k] = get_bits(&s->gb, 10);
842 /* Low frequency effect data */
843 if (!base_channel && s->lfe) {
845 int lfe_samples = 2 * s->lfe * (4 + block_index);
846 int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]);
849 for (j = lfe_samples; j < lfe_end_sample; j++) {
850 /* Signed 8 bits int */
851 s->lfe_data[j] = get_sbits(&s->gb, 8);
854 /* Scale factor index */
855 skip_bits(&s->gb, 1);
856 s->lfe_scale_factor = scale_factor_quant7[get_bits(&s->gb, 7)];
858 /* Quantization step size * scale factor */
859 lfe_scale = 0.035 * s->lfe_scale_factor;
861 for (j = lfe_samples; j < lfe_end_sample; j++)
862 s->lfe_data[j] *= lfe_scale;
866 av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n",
867 s->subsubframes[s->current_subframe]);
868 av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n",
869 s->partial_samples[s->current_subframe]);
871 for (j = base_channel; j < s->prim_channels; j++) {
872 av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:");
873 for (k = 0; k < s->subband_activity[j]; k++)
874 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]);
875 av_log(s->avctx, AV_LOG_DEBUG, "\n");
877 for (j = base_channel; j < s->prim_channels; j++) {
878 for (k = 0; k < s->subband_activity[j]; k++)
879 av_log(s->avctx, AV_LOG_DEBUG,
880 "prediction coefs: %f, %f, %f, %f\n",
881 (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192,
882 (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192,
883 (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192,
884 (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192);
886 for (j = base_channel; j < s->prim_channels; j++) {
887 av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: ");
888 for (k = 0; k < s->vq_start_subband[j]; k++)
889 av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]);
890 av_log(s->avctx, AV_LOG_DEBUG, "\n");
892 for (j = base_channel; j < s->prim_channels; j++) {
893 av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:");
894 for (k = 0; k < s->subband_activity[j]; k++)
895 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]);
896 av_log(s->avctx, AV_LOG_DEBUG, "\n");
898 for (j = base_channel; j < s->prim_channels; j++) {
899 av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:");
900 for (k = 0; k < s->subband_activity[j]; k++) {
901 if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0)
902 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]);
903 if (k < s->vq_start_subband[j] && s->transition_mode[j][k])
904 av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]);
906 av_log(s->avctx, AV_LOG_DEBUG, "\n");
908 for (j = base_channel; j < s->prim_channels; j++) {
909 if (s->joint_intensity[j] > 0) {
910 int source_channel = s->joint_intensity[j] - 1;
911 av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n");
912 for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++)
913 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]);
914 av_log(s->avctx, AV_LOG_DEBUG, "\n");
917 if (!base_channel && s->prim_channels > 2 && s->downmix) {
918 av_log(s->avctx, AV_LOG_DEBUG, "Downmix coeffs:\n");
919 for (j = 0; j < s->prim_channels; j++) {
920 av_log(s->avctx, AV_LOG_DEBUG, "Channel 0, %d = %f\n", j,
921 dca_downmix_coeffs[s->downmix_coef[j][0]]);
922 av_log(s->avctx, AV_LOG_DEBUG, "Channel 1, %d = %f\n", j,
923 dca_downmix_coeffs[s->downmix_coef[j][1]]);
925 av_log(s->avctx, AV_LOG_DEBUG, "\n");
927 for (j = base_channel; j < s->prim_channels; j++)
928 for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++)
929 av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]);
930 if (!base_channel && s->lfe) {
931 int lfe_samples = 2 * s->lfe * (4 + block_index);
932 int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]);
934 av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n");
935 for (j = lfe_samples; j < lfe_end_sample; j++)
936 av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]);
937 av_log(s->avctx, AV_LOG_DEBUG, "\n");
944 static void qmf_32_subbands(DCAContext *s, int chans,
945 float samples_in[32][8], float *samples_out,
948 const float *prCoeff;
950 int sb_act = s->subband_activity[chans];
952 scale *= sqrt(1 / 8.0);
955 if (!s->multirate_inter) /* Non-perfect reconstruction */
956 prCoeff = fir_32bands_nonperfect;
957 else /* Perfect reconstruction */
958 prCoeff = fir_32bands_perfect;
960 s->dcadsp.qmf_32_subbands(samples_in, sb_act, &s->synth, &s->imdct,
961 s->subband_fir_hist[chans],
962 &s->hist_index[chans],
963 s->subband_fir_noidea[chans], prCoeff,
964 samples_out, s->raXin, scale);
967 static void lfe_interpolation_fir(DCAContext *s, int decimation_select,
968 int num_deci_sample, float *samples_in,
969 float *samples_out, float scale)
971 /* samples_in: An array holding decimated samples.
972 * Samples in current subframe starts from samples_in[0],
973 * while samples_in[-1], samples_in[-2], ..., stores samples
974 * from last subframe as history.
976 * samples_out: An array holding interpolated samples
980 const float *prCoeff;
983 /* Select decimation filter */
984 if (decimation_select == 1) {
986 prCoeff = lfe_fir_128;
989 prCoeff = lfe_fir_64;
992 for (deciindex = 0; deciindex < num_deci_sample; deciindex++) {
993 s->dcadsp.lfe_fir(samples_out, samples_in, prCoeff, decifactor, scale);
995 samples_out += 2 * decifactor;
999 /* downmixing routines */
1000 #define MIX_REAR1(samples, s1, rs, coef) \
1001 samples[0][i] += samples[s1][i] * coef[rs][0]; \
1002 samples[1][i] += samples[s1][i] * coef[rs][1];
1004 #define MIX_REAR2(samples, s1, s2, rs, coef) \
1005 samples[0][i] += samples[s1][i] * coef[rs][0] + samples[s2][i] * coef[rs + 1][0]; \
1006 samples[1][i] += samples[s1][i] * coef[rs][1] + samples[s2][i] * coef[rs + 1][1];
1008 #define MIX_FRONT3(samples, coef) \
1009 t = samples[c][i]; \
1010 u = samples[l][i]; \
1011 v = samples[r][i]; \
1012 samples[0][i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \
1013 samples[1][i] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1];
1015 #define DOWNMIX_TO_STEREO(op1, op2) \
1016 for (i = 0; i < 256; i++) { \
1021 static void dca_downmix(float **samples, int srcfmt,
1022 int downmix_coef[DCA_PRIM_CHANNELS_MAX][2],
1023 const int8_t *channel_mapping)
1025 int c, l, r, sl, sr, s;
1028 float coef[DCA_PRIM_CHANNELS_MAX][2];
1030 for (i = 0; i < DCA_PRIM_CHANNELS_MAX; i++) {
1031 coef[i][0] = dca_downmix_coeffs[downmix_coef[i][0]];
1032 coef[i][1] = dca_downmix_coeffs[downmix_coef[i][1]];
1038 case DCA_STEREO_TOTAL:
1039 case DCA_STEREO_SUMDIFF:
1041 av_log(NULL, 0, "Not implemented!\n");
1046 c = channel_mapping[0];
1047 l = channel_mapping[1];
1048 r = channel_mapping[2];
1049 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), );
1052 s = channel_mapping[2];
1053 DOWNMIX_TO_STEREO(MIX_REAR1(samples, s, 2, coef), );
1056 c = channel_mapping[0];
1057 l = channel_mapping[1];
1058 r = channel_mapping[2];
1059 s = channel_mapping[3];
1060 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
1061 MIX_REAR1(samples, s, 3, coef));
1064 sl = channel_mapping[2];
1065 sr = channel_mapping[3];
1066 DOWNMIX_TO_STEREO(MIX_REAR2(samples, sl, sr, 2, coef), );
1069 c = channel_mapping[0];
1070 l = channel_mapping[1];
1071 r = channel_mapping[2];
1072 sl = channel_mapping[3];
1073 sr = channel_mapping[4];
1074 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
1075 MIX_REAR2(samples, sl, sr, 3, coef));
1081 #ifndef decode_blockcodes
1082 /* Very compact version of the block code decoder that does not use table
1083 * look-up but is slightly slower */
1084 static int decode_blockcode(int code, int levels, int32_t *values)
1087 int offset = (levels - 1) >> 1;
1089 for (i = 0; i < 4; i++) {
1090 int div = FASTDIV(code, levels);
1091 values[i] = code - offset - div * levels;
1098 static int decode_blockcodes(int code1, int code2, int levels, int32_t *values)
1100 return decode_blockcode(code1, levels, values) |
1101 decode_blockcode(code2, levels, values + 4);
1105 static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 };
1106 static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 };
1108 #ifndef int8x8_fmul_int32
1109 static inline void int8x8_fmul_int32(float *dst, const int8_t *src, int scale)
1111 float fscale = scale / 16.0;
1113 for (i = 0; i < 8; i++)
1114 dst[i] = src[i] * fscale;
1118 static int dca_subsubframe(DCAContext *s, int base_channel, int block_index)
1121 int subsubframe = s->current_subsubframe;
1123 const float *quant_step_table;
1126 float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index];
1127 LOCAL_ALIGNED_16(int32_t, block, [8 * DCA_SUBBANDS]);
1133 /* Select quantization step size table */
1134 if (s->bit_rate_index == 0x1f)
1135 quant_step_table = lossless_quant_d;
1137 quant_step_table = lossy_quant_d;
1139 for (k = base_channel; k < s->prim_channels; k++) {
1140 float rscale[DCA_SUBBANDS];
1142 if (get_bits_left(&s->gb) < 0)
1143 return AVERROR_INVALIDDATA;
1145 for (l = 0; l < s->vq_start_subband[k]; l++) {
1148 /* Select the mid-tread linear quantizer */
1149 int abits = s->bitalloc[k][l];
1151 float quant_step_size = quant_step_table[abits];
1154 * Determine quantization index code book and its type
1157 /* Select quantization index code book */
1158 int sel = s->quant_index_huffman[k][abits];
1161 * Extract bits from the bit stream
1165 memset(block + 8 * l, 0, 8 * sizeof(block[0]));
1167 /* Deal with transients */
1168 int sfi = s->transition_mode[k][l] && subsubframe >= s->transition_mode[k][l];
1169 rscale[l] = quant_step_size * s->scale_factor[k][l][sfi] *
1170 s->scalefactor_adj[k][sel];
1172 if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table) {
1175 int block_code1, block_code2, size, levels, err;
1177 size = abits_sizes[abits - 1];
1178 levels = abits_levels[abits - 1];
1180 block_code1 = get_bits(&s->gb, size);
1181 block_code2 = get_bits(&s->gb, size);
1182 err = decode_blockcodes(block_code1, block_code2,
1183 levels, block + 8 * l);
1185 av_log(s->avctx, AV_LOG_ERROR,
1186 "ERROR: block code look-up failed\n");
1187 return AVERROR_INVALIDDATA;
1191 for (m = 0; m < 8; m++)
1192 block[8 * l + m] = get_sbits(&s->gb, abits - 3);
1196 for (m = 0; m < 8; m++)
1197 block[8 * l + m] = get_bitalloc(&s->gb,
1198 &dca_smpl_bitalloc[abits], sel);
1204 s->fmt_conv.int32_to_float_fmul_array8(&s->fmt_conv, subband_samples[k][0],
1205 block, rscale, 8 * s->vq_start_subband[k]);
1207 for (l = 0; l < s->vq_start_subband[k]; l++) {
1210 * Inverse ADPCM if in prediction mode
1212 if (s->prediction_mode[k][l]) {
1214 for (m = 0; m < 8; m++) {
1215 for (n = 1; n <= 4; n++)
1217 subband_samples[k][l][m] +=
1218 (adpcm_vb[s->prediction_vq[k][l]][n - 1] *
1219 subband_samples[k][l][m - n] / 8192);
1220 else if (s->predictor_history)
1221 subband_samples[k][l][m] +=
1222 (adpcm_vb[s->prediction_vq[k][l]][n - 1] *
1223 s->subband_samples_hist[k][l][m - n + 4] / 8192);
1229 * Decode VQ encoded high frequencies
1231 for (l = s->vq_start_subband[k]; l < s->subband_activity[k]; l++) {
1232 /* 1 vector -> 32 samples but we only need the 8 samples
1233 * for this subsubframe. */
1234 int hfvq = s->high_freq_vq[k][l];
1236 if (!s->debug_flag & 0x01) {
1237 av_log(s->avctx, AV_LOG_DEBUG,
1238 "Stream with high frequencies VQ coding\n");
1239 s->debug_flag |= 0x01;
1242 int8x8_fmul_int32(subband_samples[k][l],
1243 &high_freq_vq[hfvq][subsubframe * 8],
1244 s->scale_factor[k][l][0]);
1248 /* Check for DSYNC after subsubframe */
1249 if (s->aspf || subsubframe == s->subsubframes[s->current_subframe] - 1) {
1250 if (0xFFFF == get_bits(&s->gb, 16)) { /* 0xFFFF */
1252 av_log(s->avctx, AV_LOG_DEBUG, "Got subframe DSYNC\n");
1255 av_log(s->avctx, AV_LOG_ERROR, "Didn't get subframe DSYNC\n");
1256 return AVERROR_INVALIDDATA;
1260 /* Backup predictor history for adpcm */
1261 for (k = base_channel; k < s->prim_channels; k++)
1262 for (l = 0; l < s->vq_start_subband[k]; l++)
1263 memcpy(s->subband_samples_hist[k][l],
1264 &subband_samples[k][l][4],
1265 4 * sizeof(subband_samples[0][0][0]));
1270 static int dca_filter_channels(DCAContext *s, int block_index)
1272 float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index];
1275 /* 32 subbands QMF */
1276 for (k = 0; k < s->prim_channels; k++) {
1277 /* static float pcm_to_double[8] = { 32768.0, 32768.0, 524288.0, 524288.0,
1278 0, 8388608.0, 8388608.0 };*/
1279 if (s->channel_order_tab[k] >= 0)
1280 qmf_32_subbands(s, k, subband_samples[k],
1281 s->samples_chanptr[s->channel_order_tab[k]],
1282 M_SQRT1_2 / 32768.0 /* pcm_to_double[s->source_pcm_res] */);
1286 if (s->avctx->request_channels == 2 && s->prim_channels > 2) {
1287 dca_downmix(s->samples_chanptr, s->amode, s->downmix_coef, s->channel_order_tab);
1290 /* Generate LFE samples for this subsubframe FIXME!!! */
1291 if (s->output & DCA_LFE) {
1292 lfe_interpolation_fir(s, s->lfe, 2 * s->lfe,
1293 s->lfe_data + 2 * s->lfe * (block_index + 4),
1294 s->samples_chanptr[dca_lfe_index[s->amode]],
1295 1.0 / (256.0 * 32768.0));
1296 /* Outputs 20bits pcm samples */
1303 static int dca_subframe_footer(DCAContext *s, int base_channel)
1305 int aux_data_count = 0, i;
1308 * Unpack optional information
1311 /* presumably optional information only appears in the core? */
1312 if (!base_channel) {
1314 skip_bits_long(&s->gb, 32);
1317 aux_data_count = get_bits(&s->gb, 6);
1319 for (i = 0; i < aux_data_count; i++)
1320 get_bits(&s->gb, 8);
1322 if (s->crc_present && (s->downmix || s->dynrange))
1323 get_bits(&s->gb, 16);
1330 * Decode a dca frame block
1332 * @param s pointer to the DCAContext
1335 static int dca_decode_block(DCAContext *s, int base_channel, int block_index)
1340 if (s->current_subframe >= s->subframes) {
1341 av_log(s->avctx, AV_LOG_DEBUG, "check failed: %i>%i",
1342 s->current_subframe, s->subframes);
1343 return AVERROR_INVALIDDATA;
1346 if (!s->current_subsubframe) {
1348 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_header\n");
1350 /* Read subframe header */
1351 if ((ret = dca_subframe_header(s, base_channel, block_index)))
1355 /* Read subsubframe */
1357 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subsubframe\n");
1359 if ((ret = dca_subsubframe(s, base_channel, block_index)))
1363 s->current_subsubframe++;
1364 if (s->current_subsubframe >= s->subsubframes[s->current_subframe]) {
1365 s->current_subsubframe = 0;
1366 s->current_subframe++;
1368 if (s->current_subframe >= s->subframes) {
1370 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_footer\n");
1372 /* Read subframe footer */
1373 if ((ret = dca_subframe_footer(s, base_channel)))
1381 * Return the number of channels in an ExSS speaker mask (HD)
1383 static int dca_exss_mask2count(int mask)
1385 /* count bits that mean speaker pairs twice */
1386 return av_popcount(mask) +
1387 av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT |
1388 DCA_EXSS_FRONT_LEFT_RIGHT |
1389 DCA_EXSS_FRONT_HIGH_LEFT_RIGHT |
1390 DCA_EXSS_WIDE_LEFT_RIGHT |
1391 DCA_EXSS_SIDE_LEFT_RIGHT |
1392 DCA_EXSS_SIDE_HIGH_LEFT_RIGHT |
1393 DCA_EXSS_SIDE_REAR_LEFT_RIGHT |
1394 DCA_EXSS_REAR_LEFT_RIGHT |
1395 DCA_EXSS_REAR_HIGH_LEFT_RIGHT));
1399 * Skip mixing coefficients of a single mix out configuration (HD)
1401 static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch)
1405 for (i = 0; i < channels; i++) {
1406 int mix_map_mask = get_bits(gb, out_ch);
1407 int num_coeffs = av_popcount(mix_map_mask);
1408 skip_bits_long(gb, num_coeffs * 6);
1413 * Parse extension substream asset header (HD)
1415 static int dca_exss_parse_asset_header(DCAContext *s)
1417 int header_pos = get_bits_count(&s->gb);
1420 int embedded_stereo = 0;
1421 int embedded_6ch = 0;
1422 int drc_code_present;
1423 int extensions_mask;
1426 if (get_bits_left(&s->gb) < 16)
1429 /* We will parse just enough to get to the extensions bitmask with which
1430 * we can set the profile value. */
1432 header_size = get_bits(&s->gb, 9) + 1;
1433 skip_bits(&s->gb, 3); // asset index
1435 if (s->static_fields) {
1436 if (get_bits1(&s->gb))
1437 skip_bits(&s->gb, 4); // asset type descriptor
1438 if (get_bits1(&s->gb))
1439 skip_bits_long(&s->gb, 24); // language descriptor
1441 if (get_bits1(&s->gb)) {
1442 /* How can one fit 1024 bytes of text here if the maximum value
1443 * for the asset header size field above was 512 bytes? */
1444 int text_length = get_bits(&s->gb, 10) + 1;
1445 if (get_bits_left(&s->gb) < text_length * 8)
1447 skip_bits_long(&s->gb, text_length * 8); // info text
1450 skip_bits(&s->gb, 5); // bit resolution - 1
1451 skip_bits(&s->gb, 4); // max sample rate code
1452 channels = get_bits(&s->gb, 8) + 1;
1454 if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers
1455 int spkr_remap_sets;
1456 int spkr_mask_size = 16;
1460 embedded_stereo = get_bits1(&s->gb);
1462 embedded_6ch = get_bits1(&s->gb);
1464 if (get_bits1(&s->gb)) {
1465 spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
1466 skip_bits(&s->gb, spkr_mask_size); // spkr activity mask
1469 spkr_remap_sets = get_bits(&s->gb, 3);
1471 for (i = 0; i < spkr_remap_sets; i++) {
1472 /* std layout mask for each remap set */
1473 num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size));
1476 for (i = 0; i < spkr_remap_sets; i++) {
1477 int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1;
1478 if (get_bits_left(&s->gb) < 0)
1481 for (j = 0; j < num_spkrs[i]; j++) {
1482 int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps);
1483 int num_dec_ch = av_popcount(remap_dec_ch_mask);
1484 skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes
1489 skip_bits(&s->gb, 3); // representation type
1493 drc_code_present = get_bits1(&s->gb);
1494 if (drc_code_present)
1495 get_bits(&s->gb, 8); // drc code
1497 if (get_bits1(&s->gb))
1498 skip_bits(&s->gb, 5); // dialog normalization code
1500 if (drc_code_present && embedded_stereo)
1501 get_bits(&s->gb, 8); // drc stereo code
1503 if (s->mix_metadata && get_bits1(&s->gb)) {
1504 skip_bits(&s->gb, 1); // external mix
1505 skip_bits(&s->gb, 6); // post mix gain code
1507 if (get_bits(&s->gb, 2) != 3) // mixer drc code
1508 skip_bits(&s->gb, 3); // drc limit
1510 skip_bits(&s->gb, 8); // custom drc code
1512 if (get_bits1(&s->gb)) // channel specific scaling
1513 for (i = 0; i < s->num_mix_configs; i++)
1514 skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes
1516 skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes
1518 for (i = 0; i < s->num_mix_configs; i++) {
1519 if (get_bits_left(&s->gb) < 0)
1521 dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]);
1523 dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]);
1524 if (embedded_stereo)
1525 dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]);
1529 switch (get_bits(&s->gb, 2)) {
1530 case 0: extensions_mask = get_bits(&s->gb, 12); break;
1531 case 1: extensions_mask = DCA_EXT_EXSS_XLL; break;
1532 case 2: extensions_mask = DCA_EXT_EXSS_LBR; break;
1533 case 3: extensions_mask = 0; /* aux coding */ break;
1536 /* not parsed further, we were only interested in the extensions mask */
1538 if (get_bits_left(&s->gb) < 0)
1541 if (get_bits_count(&s->gb) - header_pos > header_size * 8) {
1542 av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n");
1545 skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb));
1547 if (extensions_mask & DCA_EXT_EXSS_XLL)
1548 s->profile = FF_PROFILE_DTS_HD_MA;
1549 else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 |
1551 s->profile = FF_PROFILE_DTS_HD_HRA;
1553 if (!(extensions_mask & DCA_EXT_CORE))
1554 av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n");
1555 if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask)
1556 av_log(s->avctx, AV_LOG_WARNING,
1557 "DTS extensions detection mismatch (%d, %d)\n",
1558 extensions_mask & DCA_CORE_EXTS, s->core_ext_mask);
1564 * Parse extension substream header (HD)
1566 static void dca_exss_parse_header(DCAContext *s)
1572 int active_ss_mask[8];
1575 if (get_bits_left(&s->gb) < 52)
1578 skip_bits(&s->gb, 8); // user data
1579 ss_index = get_bits(&s->gb, 2);
1581 blownup = get_bits1(&s->gb);
1582 skip_bits(&s->gb, 8 + 4 * blownup); // header_size
1583 skip_bits(&s->gb, 16 + 4 * blownup); // hd_size
1585 s->static_fields = get_bits1(&s->gb);
1586 if (s->static_fields) {
1587 skip_bits(&s->gb, 2); // reference clock code
1588 skip_bits(&s->gb, 3); // frame duration code
1590 if (get_bits1(&s->gb))
1591 skip_bits_long(&s->gb, 36); // timestamp
1593 /* a single stream can contain multiple audio assets that can be
1594 * combined to form multiple audio presentations */
1596 num_audiop = get_bits(&s->gb, 3) + 1;
1597 if (num_audiop > 1) {
1598 avpriv_request_sample(s->avctx,
1599 "Multiple DTS-HD audio presentations");
1600 /* ignore such streams for now */
1604 num_assets = get_bits(&s->gb, 3) + 1;
1605 if (num_assets > 1) {
1606 avpriv_request_sample(s->avctx, "Multiple DTS-HD audio assets");
1607 /* ignore such streams for now */
1611 for (i = 0; i < num_audiop; i++)
1612 active_ss_mask[i] = get_bits(&s->gb, ss_index + 1);
1614 for (i = 0; i < num_audiop; i++)
1615 for (j = 0; j <= ss_index; j++)
1616 if (active_ss_mask[i] & (1 << j))
1617 skip_bits(&s->gb, 8); // active asset mask
1619 s->mix_metadata = get_bits1(&s->gb);
1620 if (s->mix_metadata) {
1621 int mix_out_mask_size;
1623 skip_bits(&s->gb, 2); // adjustment level
1624 mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
1625 s->num_mix_configs = get_bits(&s->gb, 2) + 1;
1627 for (i = 0; i < s->num_mix_configs; i++) {
1628 int mix_out_mask = get_bits(&s->gb, mix_out_mask_size);
1629 s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask);
1634 for (i = 0; i < num_assets; i++)
1635 skip_bits_long(&s->gb, 16 + 4 * blownup); // asset size
1637 for (i = 0; i < num_assets; i++) {
1638 if (dca_exss_parse_asset_header(s))
1642 /* not parsed further, we were only interested in the extensions mask
1643 * from the asset header */
1647 * Main frame decoding function
1648 * FIXME add arguments
1650 static int dca_decode_frame(AVCodecContext *avctx, void *data,
1651 int *got_frame_ptr, AVPacket *avpkt)
1653 AVFrame *frame = data;
1654 const uint8_t *buf = avpkt->data;
1655 int buf_size = avpkt->size;
1658 int num_core_channels = 0;
1660 float **samples_flt;
1661 DCAContext *s = avctx->priv_data;
1662 int channels, full_channels;
1668 s->dca_buffer_size = ff_dca_convert_bitstream(buf, buf_size, s->dca_buffer,
1669 DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE);
1670 if (s->dca_buffer_size == AVERROR_INVALIDDATA) {
1671 av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n");
1672 return AVERROR_INVALIDDATA;
1675 init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8);
1676 if ((ret = dca_parse_frame_header(s)) < 0) {
1677 //seems like the frame is corrupt, try with the next one
1680 //set AVCodec values with parsed data
1681 avctx->sample_rate = s->sample_rate;
1682 avctx->bit_rate = s->bit_rate;
1684 s->profile = FF_PROFILE_DTS;
1686 for (i = 0; i < (s->sample_blocks / 8); i++) {
1687 if ((ret = dca_decode_block(s, 0, i))) {
1688 av_log(avctx, AV_LOG_ERROR, "error decoding block\n");
1693 /* record number of core channels incase less than max channels are requested */
1694 num_core_channels = s->prim_channels;
1697 s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr];
1699 s->core_ext_mask = 0;
1701 core_ss_end = FFMIN(s->frame_size, s->dca_buffer_size) * 8;
1703 /* only scan for extensions if ext_descr was unknown or indicated a
1704 * supported XCh extension */
1705 if (s->core_ext_mask < 0 || s->core_ext_mask & DCA_EXT_XCH) {
1707 /* if ext_descr was unknown, clear s->core_ext_mask so that the
1708 * extensions scan can fill it up */
1709 s->core_ext_mask = FFMAX(s->core_ext_mask, 0);
1711 /* extensions start at 32-bit boundaries into bitstream */
1712 skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
1714 while (core_ss_end - get_bits_count(&s->gb) >= 32) {
1715 uint32_t bits = get_bits_long(&s->gb, 32);
1719 int ext_amode, xch_fsize;
1721 s->xch_base_channel = s->prim_channels;
1723 /* validate sync word using XCHFSIZE field */
1724 xch_fsize = show_bits(&s->gb, 10);
1725 if ((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) &&
1726 (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1))
1729 /* skip length-to-end-of-frame field for the moment */
1730 skip_bits(&s->gb, 10);
1732 s->core_ext_mask |= DCA_EXT_XCH;
1734 /* extension amode(number of channels in extension) should be 1 */
1735 /* AFAIK XCh is not used for more channels */
1736 if ((ext_amode = get_bits(&s->gb, 4)) != 1) {
1737 av_log(avctx, AV_LOG_ERROR, "XCh extension amode %d not"
1738 " supported!\n", ext_amode);
1742 /* much like core primary audio coding header */
1743 dca_parse_audio_coding_header(s, s->xch_base_channel);
1745 for (i = 0; i < (s->sample_blocks / 8); i++)
1746 if ((ret = dca_decode_block(s, s->xch_base_channel, i))) {
1747 av_log(avctx, AV_LOG_ERROR, "error decoding XCh extension\n");
1755 /* XXCh: extended channels */
1756 /* usually found either in core or HD part in DTS-HD HRA streams,
1757 * but not in DTS-ES which contains XCh extensions instead */
1758 s->core_ext_mask |= DCA_EXT_XXCH;
1762 int fsize96 = show_bits(&s->gb, 12) + 1;
1763 if (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + fsize96)
1766 av_log(avctx, AV_LOG_DEBUG, "X96 extension found at %d bits\n",
1767 get_bits_count(&s->gb));
1768 skip_bits(&s->gb, 12);
1769 av_log(avctx, AV_LOG_DEBUG, "FSIZE96 = %d bytes\n", fsize96);
1770 av_log(avctx, AV_LOG_DEBUG, "REVNO = %d\n", get_bits(&s->gb, 4));
1772 s->core_ext_mask |= DCA_EXT_X96;
1777 skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
1780 /* no supported extensions, skip the rest of the core substream */
1781 skip_bits_long(&s->gb, core_ss_end - get_bits_count(&s->gb));
1784 if (s->core_ext_mask & DCA_EXT_X96)
1785 s->profile = FF_PROFILE_DTS_96_24;
1786 else if (s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH))
1787 s->profile = FF_PROFILE_DTS_ES;
1789 /* check for ExSS (HD part) */
1790 if (s->dca_buffer_size - s->frame_size > 32 &&
1791 get_bits_long(&s->gb, 32) == DCA_HD_MARKER)
1792 dca_exss_parse_header(s);
1794 avctx->profile = s->profile;
1796 full_channels = channels = s->prim_channels + !!s->lfe;
1798 if (s->amode < 16) {
1799 avctx->channel_layout = dca_core_channel_layout[s->amode];
1801 if (s->xch_present && (!avctx->request_channels ||
1802 avctx->request_channels > num_core_channels + !!s->lfe)) {
1803 avctx->channel_layout |= AV_CH_BACK_CENTER;
1805 avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
1806 s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode];
1808 s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
1811 channels = num_core_channels + !!s->lfe;
1812 s->xch_present = 0; /* disable further xch processing */
1814 avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
1815 s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
1817 s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
1820 if (channels > !!s->lfe &&
1821 s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
1822 return AVERROR_INVALIDDATA;
1824 if (avctx->request_channels == 2 && s->prim_channels > 2) {
1826 s->output = DCA_STEREO;
1827 avctx->channel_layout = AV_CH_LAYOUT_STEREO;
1830 av_log(avctx, AV_LOG_ERROR, "Non standard configuration %d !\n", s->amode);
1831 return AVERROR_INVALIDDATA;
1833 avctx->channels = channels;
1835 /* get output buffer */
1836 frame->nb_samples = 256 * (s->sample_blocks / 8);
1837 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
1838 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1841 samples_flt = (float **)frame->extended_data;
1843 /* allocate buffer for extra channels if downmixing */
1844 if (avctx->channels < full_channels) {
1845 ret = av_samples_get_buffer_size(NULL, full_channels - channels,
1847 avctx->sample_fmt, 0);
1851 av_fast_malloc(&s->extra_channels_buffer,
1852 &s->extra_channels_buffer_size, ret);
1853 if (!s->extra_channels_buffer)
1854 return AVERROR(ENOMEM);
1856 ret = av_samples_fill_arrays((uint8_t **)s->extra_channels, NULL,
1857 s->extra_channels_buffer,
1858 full_channels - channels,
1859 frame->nb_samples, avctx->sample_fmt, 0);
1864 /* filter to get final output */
1865 for (i = 0; i < (s->sample_blocks / 8); i++) {
1868 for (ch = 0; ch < channels; ch++)
1869 s->samples_chanptr[ch] = samples_flt[ch] + i * 256;
1870 for (; ch < full_channels; ch++)
1871 s->samples_chanptr[ch] = s->extra_channels[ch - channels] + i * 256;
1873 dca_filter_channels(s, i);
1875 /* If this was marked as a DTS-ES stream we need to subtract back- */
1876 /* channel from SL & SR to remove matrixed back-channel signal */
1877 if ((s->source_pcm_res & 1) && s->xch_present) {
1878 float *back_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel]];
1879 float *lt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 2]];
1880 float *rt_chan = s->samples_chanptr[s->channel_order_tab[s->xch_base_channel - 1]];
1881 s->fdsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256);
1882 s->fdsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256);
1886 /* update lfe history */
1887 lfe_samples = 2 * s->lfe * (s->sample_blocks / 8);
1888 for (i = 0; i < 2 * s->lfe * 4; i++)
1889 s->lfe_data[i] = s->lfe_data[i + lfe_samples];
1899 * DCA initialization
1901 * @param avctx pointer to the AVCodecContext
1904 static av_cold int dca_decode_init(AVCodecContext *avctx)
1906 DCAContext *s = avctx->priv_data;
1911 avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
1912 ff_mdct_init(&s->imdct, 6, 1, 1.0);
1913 ff_synth_filter_init(&s->synth);
1914 ff_dcadsp_init(&s->dcadsp);
1915 ff_fmt_convert_init(&s->fmt_conv, avctx);
1917 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1919 /* allow downmixing to stereo */
1920 if (avctx->channels > 0 && avctx->request_channels < avctx->channels &&
1921 avctx->request_channels == 2) {
1922 avctx->channels = avctx->request_channels;
1928 static av_cold int dca_decode_end(AVCodecContext *avctx)
1930 DCAContext *s = avctx->priv_data;
1931 ff_mdct_end(&s->imdct);
1932 av_freep(&s->extra_channels_buffer);
1936 static const AVProfile profiles[] = {
1937 { FF_PROFILE_DTS, "DTS" },
1938 { FF_PROFILE_DTS_ES, "DTS-ES" },
1939 { FF_PROFILE_DTS_96_24, "DTS 96/24" },
1940 { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" },
1941 { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" },
1942 { FF_PROFILE_UNKNOWN },
1945 AVCodec ff_dca_decoder = {
1947 .type = AVMEDIA_TYPE_AUDIO,
1948 .id = AV_CODEC_ID_DTS,
1949 .priv_data_size = sizeof(DCAContext),
1950 .init = dca_decode_init,
1951 .decode = dca_decode_frame,
1952 .close = dca_decode_end,
1953 .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
1954 .capabilities = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1,
1955 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1956 AV_SAMPLE_FMT_NONE },
1957 .profiles = NULL_IF_CONFIG_SMALL(profiles),