Ticket #1309: dca.c

File dca.c, 79.2 KB (added by K.Y.H, 14 years ago)
Line 
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/common.h"
30#include "libavutil/intmath.h"
31#include "libavutil/intreadwrite.h"
32#include "libavutil/mathematics.h"
33#include "libavutil/audioconvert.h"
34#include "avcodec.h"
35#include "dsputil.h"
36#include "fft.h"
37#include "get_bits.h"
38#include "put_bits.h"
39#include "dcadata.h"
40#include "dcahuff.h"
41#include "dca.h"
42#include "dca_parser.h"
43#include "synth_filter.h"
44#include "dcadsp.h"
45#include "fmtconvert.h"
46
47#if ARCH_ARM
48# include "arm/dca.h"
49#endif
50
51//#define TRACE
52
53#define DCA_PRIM_CHANNELS_MAX (7)
54#define DCA_SUBBANDS (64)
55#define DCA_ABITS_MAX (32) /* Should be 28 */
56#define DCA_SUBSUBFRAMES_MAX (4)
57#define DCA_SUBFRAMES_MAX (16)
58#define DCA_BLOCKS_MAX (16)
59#define DCA_LFE_MAX (3)
60#define DCA_CHSETS_MAX (4)
61#define DCA_CHSET_CHANS_MAX (8)
62
63enum DCAMode {
64 DCA_MONO = 0,
65 DCA_CHANNEL,
66 DCA_STEREO,
67 DCA_STEREO_SUMDIFF,
68 DCA_STEREO_TOTAL,
69 DCA_3F,
70 DCA_2F1R,
71 DCA_3F1R,
72 DCA_2F2R,
73 DCA_3F2R,
74 DCA_4F2R
75};
76
77/* these are unconfirmed but should be mostly correct */
78enum 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,
95};
96
97enum 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
108};
109
110/* -1 are reserved or unknown */
111static const int dca_ext_audio_descr_mask[] = {
112 DCA_EXT_XCH,
113 -1,
114 DCA_EXT_X96,
115 DCA_EXT_XCH | DCA_EXT_X96,
116 -1,
117 -1,
118 DCA_EXT_XXCH,
119 -1,
120};
121
122/* extensions that reside in core substream */
123#define DCA_CORE_EXTS (DCA_EXT_XCH | DCA_EXT_XXCH | DCA_EXT_X96)
124
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.
128 *
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
131 * OV -> center back
132 * All 2 channel configurations -> AV_CH_LAYOUT_STEREO
133 */
134static 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
144
145 AV_CH_LAYOUT_STEREO | AV_CH_FRONT_CENTER | AV_CH_SIDE_LEFT |
146 AV_CH_SIDE_RIGHT, ///< 5, C + L + R + SL + SR
147
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
150
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
153
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
157
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
161
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
165
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
169};
170
171static const int8_t dca_lfe_index[] = {
172 1, 2, 2, 2, 2, 3, 2, 3, 2, 3, 2, 3, 1, 3, 2, 3
173};
174
175static 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},
192};
193
194static 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},
211};
212
213static 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},
230};
231
232static 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},
249};
250
251#define DCA_DOLBY 101 /* FIXME */
252
253#define DCA_CHANNEL_BITS 6
254#define DCA_CHANNEL_MASK 0x3F
255
256#define DCA_LFE 0x80
257
258#define HEADER_SIZE 14
259
260#define DCA_MAX_FRAME_SIZE 16384
261#define DCA_MAX_EXSS_HEADER_SIZE 4096
262
263#define DCA_BUFFER_PADDING_SIZE 1024
264
265/** Bit allocation */
266typedef struct {
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
271} BitAlloc;
272
273static BitAlloc dca_bitalloc_index; ///< indexes for samples VLC select
274static BitAlloc dca_tmode; ///< transition mode VLCs
275static BitAlloc dca_scalefactor; ///< scalefactor VLCs
276static BitAlloc dca_smpl_bitalloc[11]; ///< samples VLCs
277
278static av_always_inline int get_bitalloc(GetBitContext *gb, BitAlloc *ba,
279 int idx)
280{
281 return get_vlc2(gb, ba->vlc[idx].table, ba->vlc[idx].bits, ba->wrap) +
282 ba->offset;
283}
284
285typedef struct {
286 AVCodecContext *avctx;
287 AVFrame frame;
288 /* Frame header */
289 int frame_type; ///< type of the current frame
290 int samples_deficit; ///< deficit sample count
291 int crc_present; ///< crc is present in the bitstream
292 int sample_blocks; ///< number of PCM sample blocks
293 int frame_size; ///< primary frame byte size
294 int amode; ///< audio channels arrangement
295 int sample_rate; ///< audio sampling rate
296 int bit_rate; ///< transmission bit rate
297 int bit_rate_index; ///< transmission bit rate index
298
299 int downmix; ///< embedded downmix enabled
300 int dynrange; ///< embedded dynamic range flag
301 int timestamp; ///< embedded time stamp flag
302 int aux_data; ///< auxiliary data flag
303 int hdcd; ///< source material is mastered in HDCD
304 int ext_descr; ///< extension audio descriptor flag
305 int ext_coding; ///< extended coding flag
306 int aspf; ///< audio sync word insertion flag
307 int lfe; ///< low frequency effects flag
308 int predictor_history; ///< predictor history flag
309 int header_crc; ///< header crc check bytes
310 int multirate_inter; ///< multirate interpolator switch
311 int version; ///< encoder software revision
312 int copy_history; ///< copy history
313 int source_pcm_res; ///< source pcm resolution
314 int front_sum; ///< front sum/difference flag
315 int surround_sum; ///< surround sum/difference flag
316 int dialog_norm; ///< dialog normalisation parameter
317
318 /* Primary audio coding header */
319 int subframes; ///< number of subframes
320 int total_channels; ///< number of channels including extensions
321 int prim_channels; ///< number of primary audio channels
322 int subband_activity[DCA_PRIM_CHANNELS_MAX]; ///< subband activity count
323 int vq_start_subband[DCA_PRIM_CHANNELS_MAX]; ///< high frequency vq start subband
324 int joint_intensity[DCA_PRIM_CHANNELS_MAX]; ///< joint intensity coding index
325 int transient_huffman[DCA_PRIM_CHANNELS_MAX]; ///< transient mode code book
326 int scalefactor_huffman[DCA_PRIM_CHANNELS_MAX]; ///< scale factor code book
327 int bitalloc_huffman[DCA_PRIM_CHANNELS_MAX]; ///< bit allocation quantizer select
328 int quant_index_huffman[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< quantization index codebook select
329 float scalefactor_adj[DCA_PRIM_CHANNELS_MAX][DCA_ABITS_MAX]; ///< scale factor adjustment
330
331 /* Primary audio coding side information */
332 int subsubframes[DCA_SUBFRAMES_MAX]; ///< number of subsubframes
333 int partial_samples[DCA_SUBFRAMES_MAX]; ///< partial subsubframe samples count
334 int prediction_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction mode (ADPCM used or not)
335 int prediction_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< prediction VQ coefs
336 int bitalloc[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< bit allocation index
337 int transition_mode[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< transition mode (transients)
338 int scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][2]; ///< scale factors (2 if transient)
339 int joint_huff[DCA_PRIM_CHANNELS_MAX]; ///< joint subband scale factors codebook
340 int joint_scale_factor[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< joint subband scale factors
341 int downmix_coef[DCA_PRIM_CHANNELS_MAX][2]; ///< stereo downmix coefficients
342 int dynrange_coef; ///< dynamic range coefficient
343
344 int high_freq_vq[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS]; ///< VQ encoded high frequency subbands
345
346 float lfe_data[2 * DCA_LFE_MAX * (DCA_BLOCKS_MAX + 4)]; ///< Low frequency effect data
347 int lfe_scale_factor;
348
349 /* Subband samples history (for ADPCM) */
350 DECLARE_ALIGNED(16, float, subband_samples_hist)[DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][4];
351 DECLARE_ALIGNED(32, float, subband_fir_hist)[DCA_PRIM_CHANNELS_MAX][512];
352 DECLARE_ALIGNED(32, float, subband_fir_noidea)[DCA_PRIM_CHANNELS_MAX][32];
353 int hist_index[DCA_PRIM_CHANNELS_MAX];
354 DECLARE_ALIGNED(32, float, raXin)[32];
355
356 int output; ///< type of output
357 float scale_bias; ///< output scale
358
359 DECLARE_ALIGNED(32, float, subband_samples)[DCA_BLOCKS_MAX][DCA_PRIM_CHANNELS_MAX][DCA_SUBBANDS][8];
360 DECLARE_ALIGNED(32, float, samples)[(DCA_PRIM_CHANNELS_MAX + 1) * 256];
361 const float *samples_chanptr[DCA_PRIM_CHANNELS_MAX + 1];
362
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
365
366 const int8_t *channel_order_tab; ///< channel reordering table, lfe and non lfe
367 GetBitContext gb;
368 /* Current position in DCA frame */
369 int current_subframe;
370 int current_subsubframe;
371
372 int core_ext_mask; ///< present extensions in the core substream
373
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
377
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
383
384 int profile;
385
386 int debug_flag; ///< used for suppressing repeated error messages output
387 DSPContext dsp;
388 FFTContext imdct;
389 SynthFilterContext synth;
390 DCADSPContext dcadsp;
391 FmtConvertContext fmt_conv;
392} DCAContext;
393
394static 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,
401};
402
403static av_cold void dca_init_vlcs(void)
404{
405 static int vlcs_initialized = 0;
406 int i, j, c = 14;
407 static VLC_TYPE dca_table[23622][2];
408
409 if (vlcs_initialized)
410 return;
411
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);
420 }
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);
429 }
430 dca_tmode.offset = 0;
431 dca_tmode.wrap = 1;
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,
436 tmode_bits[i], 1, 1,
437 tmode_codes[i], 2, 2, INIT_VLC_USE_NEW_STATIC);
438 }
439
440 for (i = 0; i < 10; i++)
441 for (j = 0; j < 7; j++) {
442 if (!bitalloc_codes[i][j])
443 break;
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];
448
449 init_vlc(&dca_smpl_bitalloc[i + 1].vlc[j], bitalloc_maxbits[i][j],
450 bitalloc_sizes[i],
451 bitalloc_bits[i][j], 1, 1,
452 bitalloc_codes[i][j], 2, 2, INIT_VLC_USE_NEW_STATIC);
453 c++;
454 }
455 vlcs_initialized = 1;
456}
457
458static inline void get_array(GetBitContext *gb, int *dst, int len, int bits)
459{
460 while (len--)
461 *dst++ = get_bits(gb, bits);
462}
463
464static int dca_parse_audio_coding_header(DCAContext *s, int base_channel)
465{
466 int i, j;
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 };
470
471 s->total_channels = get_bits(&s->gb, 3) + 1 + base_channel;
472 s->prim_channels = s->total_channels;
473
474 if (s->prim_channels > DCA_PRIM_CHANNELS_MAX)
475 s->prim_channels = DCA_PRIM_CHANNELS_MAX;
476
477
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;
482 }
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;
487 }
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);
492
493 /* Get codebooks quantization indexes */
494 if (!base_channel)
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]);
499
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;
504
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)];
509
510 if (s->crc_present) {
511 /* Audio header CRC check */
512 get_bits(&s->gb, 16);
513 }
514
515 s->current_subframe = 0;
516 s->current_subsubframe = 0;
517
518#ifdef TRACE
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");
542 }
543#endif
544
545 return 0;
546}
547
548static int dca_parse_frame_header(DCAContext *s)
549{
550 init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8);
551
552 /* Sync code */
553 skip_bits_long(&s->gb, 32);
554
555 /* Frame header */
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 = dca_sample_rates[get_bits(&s->gb, 4)];
565 if (!s->sample_rate)
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];
569 if (!s->bit_rate)
570 return AVERROR_INVALIDDATA;
571
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);
582
583 /* TODO: check CRC */
584 if (s->crc_present)
585 s->header_crc = get_bits(&s->gb, 16);
586
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);
594
595 /* FIXME: channels mixing levels */
596 s->output = s->amode;
597 if (s->lfe)
598 s->output |= DCA_LFE;
599
600#ifdef TRACE
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",
610 s->sample_rate);
611 av_log(s->avctx, AV_LOG_DEBUG, "bit rate: %i bits/s\n",
612 s->bit_rate);
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",
626 s->multirate_inter);
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");
636#endif
637
638 /* Primary audio coding header */
639 s->subframes = get_bits(&s->gb, 4) + 1;
640
641 return dca_parse_audio_coding_header(s, 0);
642}
643
644
645static inline int get_scale(GetBitContext *gb, int level, int value, int log2range)
646{
647 if (level < 5) {
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);
655 } else {
656 value = get_bits(gb, level + 1);
657 }
658 }
659 return value;
660}
661
662static int dca_subframe_header(DCAContext *s, int base_channel, int block_index)
663{
664 /* Primary audio coding side information */
665 int j, k;
666
667 if (get_bits_left(&s->gb) < 0)
668 return AVERROR_INVALIDDATA;
669
670 if (!base_channel) {
671 s->subsubframes[s->current_subframe] = get_bits(&s->gb, 2) + 1;
672 s->partial_samples[s->current_subframe] = get_bits(&s->gb, 3);
673 }
674
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);
678 }
679
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);
686 }
687 }
688 }
689
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;
701 } else {
702 s->bitalloc[j][k] =
703 get_bitalloc(&s->gb, &dca_bitalloc_index, s->bitalloc_huffman[j]);
704 }
705
706 if (s->bitalloc[j][k] > 26) {
707 // av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index [%i][%i] too big (%i)\n",
708 // j, k, s->bitalloc[j][k]);
709 return AVERROR_INVALIDDATA;
710 }
711 }
712 }
713
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]);
722 }
723 }
724 }
725
726 if (get_bits_left(&s->gb) < 0)
727 return AVERROR_INVALIDDATA;
728
729 for (j = base_channel; j < s->prim_channels; j++) {
730 const uint32_t *scale_table;
731 int scale_sum, log_size;
732
733 memset(s->scale_factor[j], 0,
734 s->subband_activity[j] * sizeof(s->scale_factor[0][0][0]) * 2);
735
736 if (s->scalefactor_huffman[j] == 6) {
737 scale_table = scale_factor_quant7;
738 log_size = 7;
739 } else {
740 scale_table = scale_factor_quant6;
741 log_size = 6;
742 }
743
744 /* When huffman coded, only the difference is encoded */
745 scale_sum = 0;
746
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];
751 }
752
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];
757 }
758 }
759 }
760
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);
766 }
767
768 if (get_bits_left(&s->gb) < 0)
769 return AVERROR_INVALIDDATA;
770
771 /* Scale factors for joint subband coding */
772 for (j = base_channel; j < s->prim_channels; j++) {
773 int source_channel;
774
775 /* Transmitted only if joint subband coding enabled */
776 if (s->joint_intensity[j] > 0) {
777 int scale = 0;
778 source_channel = s->joint_intensity[j] - 1;
779
780 /* When huffman coded, only the difference is encoded
781 * (is this valid as well for joint scales ???) */
782
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]; */
786 }
787
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;
792 }
793 }
794 }
795
796 /* Stereo downmix coefficients */
797 if (!base_channel && s->prim_channels > 2) {
798 if (s->downmix) {
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);
802 }
803 } else {
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;
809 }
810 for (j = base_channel; j < FFMIN(s->prim_channels, FF_ARRAY_ELEMS(dca_default_coeffs[am])); j++) {
811 s->downmix_coef[j][0] = dca_default_coeffs[am][j][0];
812 s->downmix_coef[j][1] = dca_default_coeffs[am][j][1];
813 }
814 }
815 }
816
817 /* Dynamic range coefficient */
818 if (!base_channel && s->dynrange)
819 s->dynrange_coef = get_bits(&s->gb, 8);
820
821 /* Side information CRC check word */
822 if (s->crc_present) {
823 get_bits(&s->gb, 16);
824 }
825
826 /*
827 * Primary audio data arrays
828 */
829
830 /* VQ encoded high frequency subbands */
831 for (j = base_channel; j < s->prim_channels; j++)
832 for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++)
833 /* 1 vector -> 32 samples */
834 s->high_freq_vq[j][k] = get_bits(&s->gb, 10);
835
836 /* Low frequency effect data */
837 if (!base_channel && s->lfe) {
838 int quant7;
839 /* LFE samples */
840 int lfe_samples = 2 * s->lfe * (4 + block_index);
841 int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]);
842 float lfe_scale;
843
844 for (j = lfe_samples; j < lfe_end_sample; j++) {
845 /* Signed 8 bits int */
846 s->lfe_data[j] = get_sbits(&s->gb, 8);
847 }
848
849 /* Scale factor index */
850 quant7 = get_bits(&s->gb, 8);
851 if (quant7 > 127) {
852 av_log_ask_for_sample(s->avctx, "LFEScaleIndex larger than 127\n");
853 return AVERROR_INVALIDDATA;
854 }
855 s->lfe_scale_factor = scale_factor_quant7[quant7];
856
857 /* Quantization step size * scale factor */
858 lfe_scale = 0.035 * s->lfe_scale_factor;
859
860 for (j = lfe_samples; j < lfe_end_sample; j++)
861 s->lfe_data[j] *= lfe_scale;
862 }
863
864#ifdef TRACE
865 av_log(s->avctx, AV_LOG_DEBUG, "subsubframes: %i\n",
866 s->subsubframes[s->current_subframe]);
867 av_log(s->avctx, AV_LOG_DEBUG, "partial samples: %i\n",
868 s->partial_samples[s->current_subframe]);
869
870 for (j = base_channel; j < s->prim_channels; j++) {
871 av_log(s->avctx, AV_LOG_DEBUG, "prediction mode:");
872 for (k = 0; k < s->subband_activity[j]; k++)
873 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->prediction_mode[j][k]);
874 av_log(s->avctx, AV_LOG_DEBUG, "\n");
875 }
876 for (j = base_channel; j < s->prim_channels; j++) {
877 for (k = 0; k < s->subband_activity[j]; k++)
878 av_log(s->avctx, AV_LOG_DEBUG,
879 "prediction coefs: %f, %f, %f, %f\n",
880 (float) adpcm_vb[s->prediction_vq[j][k]][0] / 8192,
881 (float) adpcm_vb[s->prediction_vq[j][k]][1] / 8192,
882 (float) adpcm_vb[s->prediction_vq[j][k]][2] / 8192,
883 (float) adpcm_vb[s->prediction_vq[j][k]][3] / 8192);
884 }
885 for (j = base_channel; j < s->prim_channels; j++) {
886 av_log(s->avctx, AV_LOG_DEBUG, "bitalloc index: ");
887 for (k = 0; k < s->vq_start_subband[j]; k++)
888 av_log(s->avctx, AV_LOG_DEBUG, "%2.2i ", s->bitalloc[j][k]);
889 av_log(s->avctx, AV_LOG_DEBUG, "\n");
890 }
891 for (j = base_channel; j < s->prim_channels; j++) {
892 av_log(s->avctx, AV_LOG_DEBUG, "Transition mode:");
893 for (k = 0; k < s->subband_activity[j]; k++)
894 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->transition_mode[j][k]);
895 av_log(s->avctx, AV_LOG_DEBUG, "\n");
896 }
897 for (j = base_channel; j < s->prim_channels; j++) {
898 av_log(s->avctx, AV_LOG_DEBUG, "Scale factor:");
899 for (k = 0; k < s->subband_activity[j]; k++) {
900 if (k >= s->vq_start_subband[j] || s->bitalloc[j][k] > 0)
901 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->scale_factor[j][k][0]);
902 if (k < s->vq_start_subband[j] && s->transition_mode[j][k])
903 av_log(s->avctx, AV_LOG_DEBUG, " %i(t)", s->scale_factor[j][k][1]);
904 }
905 av_log(s->avctx, AV_LOG_DEBUG, "\n");
906 }
907 for (j = base_channel; j < s->prim_channels; j++) {
908 if (s->joint_intensity[j] > 0) {
909 int source_channel = s->joint_intensity[j] - 1;
910 av_log(s->avctx, AV_LOG_DEBUG, "Joint scale factor index:\n");
911 for (k = s->subband_activity[j]; k < s->subband_activity[source_channel]; k++)
912 av_log(s->avctx, AV_LOG_DEBUG, " %i", s->joint_scale_factor[j][k]);
913 av_log(s->avctx, AV_LOG_DEBUG, "\n");
914 }
915 }
916 if (!base_channel && s->prim_channels > 2 && s->downmix) {
917 av_log(s->avctx, AV_LOG_DEBUG, "Downmix coeffs:\n");
918 for (j = 0; j < s->prim_channels; j++) {
919 av_log(s->avctx, AV_LOG_DEBUG, "Channel 0, %d = %f\n", j,
920 dca_downmix_coeffs[s->downmix_coef[j][0]]);
921 av_log(s->avctx, AV_LOG_DEBUG, "Channel 1, %d = %f\n", j,
922 dca_downmix_coeffs[s->downmix_coef[j][1]]);
923 }
924 av_log(s->avctx, AV_LOG_DEBUG, "\n");
925 }
926 for (j = base_channel; j < s->prim_channels; j++)
927 for (k = s->vq_start_subband[j]; k < s->subband_activity[j]; k++)
928 av_log(s->avctx, AV_LOG_DEBUG, "VQ index: %i\n", s->high_freq_vq[j][k]);
929 if (!base_channel && s->lfe) {
930 int lfe_samples = 2 * s->lfe * (4 + block_index);
931 int lfe_end_sample = 2 * s->lfe * (4 + block_index + s->subsubframes[s->current_subframe]);
932
933 av_log(s->avctx, AV_LOG_DEBUG, "LFE samples:\n");
934 for (j = lfe_samples; j < lfe_end_sample; j++)
935 av_log(s->avctx, AV_LOG_DEBUG, " %f", s->lfe_data[j]);
936 av_log(s->avctx, AV_LOG_DEBUG, "\n");
937 }
938#endif
939
940 return 0;
941}
942
943static void qmf_32_subbands(DCAContext *s, int chans,
944 float samples_in[32][8], float *samples_out,
945 float scale)
946{
947 const float *prCoeff;
948 int i;
949
950 int sb_act = s->subband_activity[chans];
951 int subindex;
952
953 scale *= sqrt(1 / 8.0);
954
955 /* Select filter */
956 if (!s->multirate_inter) /* Non-perfect reconstruction */
957 prCoeff = fir_32bands_nonperfect;
958 else /* Perfect reconstruction */
959 prCoeff = fir_32bands_perfect;
960
961 for (i = sb_act; i < 32; i++)
962 s->raXin[i] = 0.0;
963
964 /* Reconstructed channel sample index */
965 for (subindex = 0; subindex < 8; subindex++) {
966 /* Load in one sample from each subband and clear inactive subbands */
967 for (i = 0; i < sb_act; i++) {
968 unsigned sign = (i - 1) & 2;
969 uint32_t v = AV_RN32A(&samples_in[i][subindex]) ^ sign << 30;
970 AV_WN32A(&s->raXin[i], v);
971 }
972
973 s->synth.synth_filter_float(&s->imdct,
974 s->subband_fir_hist[chans],
975 &s->hist_index[chans],
976 s->subband_fir_noidea[chans], prCoeff,
977 samples_out, s->raXin, scale);
978 samples_out += 32;
979 }
980}
981
982static void lfe_interpolation_fir(DCAContext *s, int decimation_select,
983 int num_deci_sample, float *samples_in,
984 float *samples_out, float scale)
985{
986 /* samples_in: An array holding decimated samples.
987 * Samples in current subframe starts from samples_in[0],
988 * while samples_in[-1], samples_in[-2], ..., stores samples
989 * from last subframe as history.
990 *
991 * samples_out: An array holding interpolated samples
992 */
993
994 int decifactor;
995 const float *prCoeff;
996 int deciindex;
997
998 /* Select decimation filter */
999 if (decimation_select == 1) {
1000 decifactor = 64;
1001 prCoeff = lfe_fir_128;
1002 } else {
1003 decifactor = 32;
1004 prCoeff = lfe_fir_64;
1005 }
1006 /* Interpolation */
1007 for (deciindex = 0; deciindex < num_deci_sample; deciindex++) {
1008 s->dcadsp.lfe_fir(samples_out, samples_in, prCoeff, decifactor, scale);
1009 samples_in++;
1010 samples_out += 2 * decifactor;
1011 }
1012}
1013
1014/* downmixing routines */
1015#define MIX_REAR1(samples, si1, rs, coef) \
1016 samples[i] += samples[si1] * coef[rs][0]; \
1017 samples[i+256] += samples[si1] * coef[rs][1];
1018
1019#define MIX_REAR2(samples, si1, si2, rs, coef) \
1020 samples[i] += samples[si1] * coef[rs][0] + samples[si2] * coef[rs + 1][0]; \
1021 samples[i+256] += samples[si1] * coef[rs][1] + samples[si2] * coef[rs + 1][1];
1022
1023#define MIX_FRONT3(samples, coef) \
1024 t = samples[i + c]; \
1025 u = samples[i + l]; \
1026 v = samples[i + r]; \
1027 samples[i] = t * coef[0][0] + u * coef[1][0] + v * coef[2][0]; \
1028 samples[i+256] = t * coef[0][1] + u * coef[1][1] + v * coef[2][1];
1029
1030#define DOWNMIX_TO_STEREO(op1, op2) \
1031 for (i = 0; i < 256; i++) { \
1032 op1 \
1033 op2 \
1034 }
1035
1036static void dca_downmix(float *samples, int srcfmt,
1037 int downmix_coef[DCA_PRIM_CHANNELS_MAX][2],
1038 const int8_t *channel_mapping)
1039{
1040 int c, l, r, sl, sr, s;
1041 int i;
1042 float t, u, v;
1043 float coef[DCA_PRIM_CHANNELS_MAX][2];
1044
1045 for (i = 0; i < DCA_PRIM_CHANNELS_MAX; i++) {
1046 coef[i][0] = dca_downmix_coeffs[downmix_coef[i][0]];
1047 coef[i][1] = dca_downmix_coeffs[downmix_coef[i][1]];
1048 }
1049
1050 switch (srcfmt) {
1051 case DCA_MONO:
1052 case DCA_CHANNEL:
1053 case DCA_STEREO_TOTAL:
1054 case DCA_STEREO_SUMDIFF:
1055 case DCA_4F2R:
1056 av_log(NULL, 0, "Not implemented!\n");
1057 break;
1058 case DCA_STEREO:
1059 break;
1060 case DCA_3F:
1061 c = channel_mapping[0] * 256;
1062 l = channel_mapping[1] * 256;
1063 r = channel_mapping[2] * 256;
1064 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef), );
1065 break;
1066 case DCA_2F1R:
1067 s = channel_mapping[2] * 256;
1068 DOWNMIX_TO_STEREO(MIX_REAR1(samples, i + s, 2, coef), );
1069 break;
1070 case DCA_3F1R:
1071 c = channel_mapping[0] * 256;
1072 l = channel_mapping[1] * 256;
1073 r = channel_mapping[2] * 256;
1074 s = channel_mapping[3] * 256;
1075 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
1076 MIX_REAR1(samples, i + s, 3, coef));
1077 break;
1078 case DCA_2F2R:
1079 sl = channel_mapping[2] * 256;
1080 sr = channel_mapping[3] * 256;
1081 DOWNMIX_TO_STEREO(MIX_REAR2(samples, i + sl, i + sr, 2, coef), );
1082 break;
1083 case DCA_3F2R:
1084 c = channel_mapping[0] * 256;
1085 l = channel_mapping[1] * 256;
1086 r = channel_mapping[2] * 256;
1087 sl = channel_mapping[3] * 256;
1088 sr = channel_mapping[4] * 256;
1089 DOWNMIX_TO_STEREO(MIX_FRONT3(samples, coef),
1090 MIX_REAR2(samples, i + sl, i + sr, 3, coef));
1091 break;
1092 }
1093}
1094
1095
1096#ifndef decode_blockcodes
1097/* Very compact version of the block code decoder that does not use table
1098 * look-up but is slightly slower */
1099static int decode_blockcode(int code, int levels, int *values)
1100{
1101 int i;
1102 int offset = (levels - 1) >> 1;
1103
1104 for (i = 0; i < 4; i++) {
1105 int div = FASTDIV(code, levels);
1106 values[i] = code - offset - div * levels;
1107 code = div;
1108 }
1109
1110 return code;
1111}
1112
1113static int decode_blockcodes(int code1, int code2, int levels, int *values)
1114{
1115 return decode_blockcode(code1, levels, values) |
1116 decode_blockcode(code2, levels, values + 4);
1117}
1118#endif
1119
1120static const uint8_t abits_sizes[7] = { 7, 10, 12, 13, 15, 17, 19 };
1121static const uint8_t abits_levels[7] = { 3, 5, 7, 9, 13, 17, 25 };
1122
1123#ifndef int8x8_fmul_int32
1124static inline void int8x8_fmul_int32(float *dst, const int8_t *src, int scale)
1125{
1126 float fscale = scale / 16.0;
1127 int i;
1128 for (i = 0; i < 8; i++)
1129 dst[i] = src[i] * fscale;
1130}
1131#endif
1132
1133static int dca_subsubframe(DCAContext *s, int base_channel, int block_index)
1134{
1135 int k, l;
1136 int subsubframe = s->current_subsubframe;
1137
1138 const float *quant_step_table;
1139
1140 /* FIXME */
1141 float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index];
1142 LOCAL_ALIGNED_16(int, block, [8]);
1143
1144 /*
1145 * Audio data
1146 */
1147
1148 /* Select quantization step size table */
1149 if (s->bit_rate_index == 0x1f)
1150 quant_step_table = lossless_quant_d;
1151 else
1152 quant_step_table = lossy_quant_d;
1153
1154 for (k = base_channel; k < s->prim_channels; k++) {
1155 if (get_bits_left(&s->gb) < 0)
1156 return AVERROR_INVALIDDATA;
1157
1158 for (l = 0; l < s->vq_start_subband[k]; l++) {
1159 int m;
1160
1161 /* Select the mid-tread linear quantizer */
1162 int abits = s->bitalloc[k][l];
1163
1164 float quant_step_size = quant_step_table[abits];
1165
1166 /*
1167 * Determine quantization index code book and its type
1168 */
1169
1170 /* Select quantization index code book */
1171 int sel = s->quant_index_huffman[k][abits];
1172
1173 /*
1174 * Extract bits from the bit stream
1175 */
1176 if (!abits) {
1177 memset(subband_samples[k][l], 0, 8 * sizeof(subband_samples[0][0][0]));
1178 } else {
1179 /* Deal with transients */
1180 int sfi = s->transition_mode[k][l] && subsubframe >= s->transition_mode[k][l];
1181 float rscale = quant_step_size * s->scale_factor[k][l][sfi] *
1182 s->scalefactor_adj[k][sel];
1183
1184 if (abits >= 11 || !dca_smpl_bitalloc[abits].vlc[sel].table) {
1185 if (abits <= 7) {
1186 /* Block code */
1187 int block_code1, block_code2, size, levels, err;
1188
1189 size = abits_sizes[abits - 1];
1190 levels = abits_levels[abits - 1];
1191
1192 block_code1 = get_bits(&s->gb, size);
1193 block_code2 = get_bits(&s->gb, size);
1194 err = decode_blockcodes(block_code1, block_code2,
1195 levels, block);
1196 if (err) {
1197 av_log(s->avctx, AV_LOG_ERROR,
1198 "ERROR: block code look-up failed\n");
1199 return AVERROR_INVALIDDATA;
1200 }
1201 } else {
1202 /* no coding */
1203 for (m = 0; m < 8; m++)
1204 block[m] = get_sbits(&s->gb, abits - 3);
1205 }
1206 } else {
1207 /* Huffman coded */
1208 for (m = 0; m < 8; m++)
1209 block[m] = get_bitalloc(&s->gb,
1210 &dca_smpl_bitalloc[abits], sel);
1211 }
1212
1213 s->fmt_conv.int32_to_float_fmul_scalar(subband_samples[k][l],
1214 block, rscale, 8);
1215 }
1216
1217 /*
1218 * Inverse ADPCM if in prediction mode
1219 */
1220 if (s->prediction_mode[k][l]) {
1221 int n;
1222 for (m = 0; m < 8; m++) {
1223 for (n = 1; n <= 4; n++)
1224 if (m >= n)
1225 subband_samples[k][l][m] +=
1226 (adpcm_vb[s->prediction_vq[k][l]][n - 1] *
1227 subband_samples[k][l][m - n] / 8192);
1228 else if (s->predictor_history)
1229 subband_samples[k][l][m] +=
1230 (adpcm_vb[s->prediction_vq[k][l]][n - 1] *
1231 s->subband_samples_hist[k][l][m - n + 4] / 8192);
1232 }
1233 }
1234 }
1235
1236 /*
1237 * Decode VQ encoded high frequencies
1238 */
1239 for (l = s->vq_start_subband[k]; l < s->subband_activity[k]; l++) {
1240 /* 1 vector -> 32 samples but we only need the 8 samples
1241 * for this subsubframe. */
1242 int hfvq = s->high_freq_vq[k][l];
1243
1244 if (!s->debug_flag & 0x01) {
1245 av_log(s->avctx, AV_LOG_DEBUG,
1246 "Stream with high frequencies VQ coding\n");
1247 s->debug_flag |= 0x01;
1248 }
1249
1250 int8x8_fmul_int32(subband_samples[k][l],
1251 &high_freq_vq[hfvq][subsubframe * 8],
1252 s->scale_factor[k][l][0]);
1253 }
1254 }
1255
1256 /* Check for DSYNC after subsubframe */
1257 if (s->aspf || subsubframe == s->subsubframes[s->current_subframe] - 1) {
1258 if (0xFFFF == get_bits(&s->gb, 16)) { /* 0xFFFF */
1259#ifdef TRACE
1260 av_log(s->avctx, AV_LOG_DEBUG, "Got subframe DSYNC\n");
1261#endif
1262 } else {
1263 av_log(s->avctx, AV_LOG_ERROR, "Didn't get subframe DSYNC\n");
1264 }
1265 }
1266
1267 /* Backup predictor history for adpcm */
1268 for (k = base_channel; k < s->prim_channels; k++)
1269 for (l = 0; l < s->vq_start_subband[k]; l++)
1270 memcpy(s->subband_samples_hist[k][l],
1271 &subband_samples[k][l][4],
1272 4 * sizeof(subband_samples[0][0][0]));
1273
1274 return 0;
1275}
1276
1277static int dca_filter_channels(DCAContext *s, int block_index)
1278{
1279 float (*subband_samples)[DCA_SUBBANDS][8] = s->subband_samples[block_index];
1280 int k;
1281
1282 /* 32 subbands QMF */
1283 for (k = 0; k < s->prim_channels; k++) {
1284/* static float pcm_to_double[8] = { 32768.0, 32768.0, 524288.0, 524288.0,
1285 0, 8388608.0, 8388608.0 };*/
1286 qmf_32_subbands(s, k, subband_samples[k],
1287 &s->samples[256 * s->channel_order_tab[k]],
1288 M_SQRT1_2 * s->scale_bias /* pcm_to_double[s->source_pcm_res] */);
1289 }
1290
1291 /* Down mixing */
1292 if (s->avctx->request_channels == 2 && s->prim_channels > 2) {
1293 dca_downmix(s->samples, s->amode, s->downmix_coef, s->channel_order_tab);
1294 }
1295
1296 /* Generate LFE samples for this subsubframe FIXME!!! */
1297 if (s->output & DCA_LFE) {
1298 lfe_interpolation_fir(s, s->lfe, 2 * s->lfe,
1299 s->lfe_data + 2 * s->lfe * (block_index + 4),
1300 &s->samples[256 * dca_lfe_index[s->amode]],
1301 (1.0 / 256.0) * s->scale_bias);
1302 /* Outputs 20bits pcm samples */
1303 }
1304
1305 return 0;
1306}
1307
1308
1309static int dca_subframe_footer(DCAContext *s, int base_channel)
1310{
1311 int aux_data_count = 0, i;
1312
1313 /*
1314 * Unpack optional information
1315 */
1316
1317 /* presumably optional information only appears in the core? */
1318 if (!base_channel) {
1319 if (s->timestamp)
1320 skip_bits_long(&s->gb, 32);
1321
1322 if (s->aux_data)
1323 aux_data_count = get_bits(&s->gb, 6);
1324
1325 for (i = 0; i < aux_data_count; i++)
1326 get_bits(&s->gb, 8);
1327
1328 if (s->crc_present && (s->downmix || s->dynrange))
1329 get_bits(&s->gb, 16);
1330 }
1331
1332 return 0;
1333}
1334
1335/**
1336 * Decode a dca frame block
1337 *
1338 * @param s pointer to the DCAContext
1339 */
1340
1341static int dca_decode_block(DCAContext *s, int base_channel, int block_index)
1342{
1343 int ret;
1344
1345 /* Sanity check */
1346 if (s->current_subframe >= s->subframes) {
1347 av_log(s->avctx, AV_LOG_DEBUG, "check failed: %i>%i",
1348 s->current_subframe, s->subframes);
1349 return AVERROR_INVALIDDATA;
1350 }
1351
1352 if (!s->current_subsubframe) {
1353#ifdef TRACE
1354 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_header\n");
1355#endif
1356 /* Read subframe header */
1357 if ((ret = dca_subframe_header(s, base_channel, block_index)))
1358 return ret;
1359 }
1360
1361 /* Read subsubframe */
1362#ifdef TRACE
1363 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subsubframe\n");
1364#endif
1365 if ((ret = dca_subsubframe(s, base_channel, block_index)))
1366 return ret;
1367
1368 /* Update state */
1369 s->current_subsubframe++;
1370 if (s->current_subsubframe >= s->subsubframes[s->current_subframe]) {
1371 s->current_subsubframe = 0;
1372 s->current_subframe++;
1373 }
1374 if (s->current_subframe >= s->subframes) {
1375#ifdef TRACE
1376 av_log(s->avctx, AV_LOG_DEBUG, "DSYNC dca_subframe_footer\n");
1377#endif
1378 /* Read subframe footer */
1379 if ((ret = dca_subframe_footer(s, base_channel)))
1380 return ret;
1381 }
1382
1383 return 0;
1384}
1385
1386/**
1387 * Return the number of channels in an ExSS speaker mask (HD)
1388 */
1389static int dca_exss_mask2count(int mask)
1390{
1391 /* count bits that mean speaker pairs twice */
1392 return av_popcount(mask) +
1393 av_popcount(mask & (DCA_EXSS_CENTER_LEFT_RIGHT |
1394 DCA_EXSS_FRONT_LEFT_RIGHT |
1395 DCA_EXSS_FRONT_HIGH_LEFT_RIGHT |
1396 DCA_EXSS_WIDE_LEFT_RIGHT |
1397 DCA_EXSS_SIDE_LEFT_RIGHT |
1398 DCA_EXSS_SIDE_HIGH_LEFT_RIGHT |
1399 DCA_EXSS_SIDE_REAR_LEFT_RIGHT |
1400 DCA_EXSS_REAR_LEFT_RIGHT |
1401 DCA_EXSS_REAR_HIGH_LEFT_RIGHT));
1402}
1403
1404/**
1405 * Skip mixing coefficients of a single mix out configuration (HD)
1406 */
1407static void dca_exss_skip_mix_coeffs(GetBitContext *gb, int channels, int out_ch)
1408{
1409 int i;
1410
1411 for (i = 0; i < channels; i++) {
1412 int mix_map_mask = get_bits(gb, out_ch);
1413 int num_coeffs = av_popcount(mix_map_mask);
1414 skip_bits_long(gb, num_coeffs * 6);
1415 }
1416}
1417
1418/**
1419 * Parse extension substream asset header (HD)
1420 */
1421static int dca_exss_parse_asset_header(DCAContext *s)
1422{
1423 int header_pos = get_bits_count(&s->gb);
1424 int header_size;
1425 int channels = 0;
1426 int embedded_stereo = 0;
1427 int embedded_6ch = 0;
1428 int drc_code_present;
1429 int av_uninit(extensions_mask);
1430 int i, j;
1431
1432 if (get_bits_left(&s->gb) < 16)
1433 return -1;
1434
1435 /* We will parse just enough to get to the extensions bitmask with which
1436 * we can set the profile value. */
1437
1438 header_size = get_bits(&s->gb, 9) + 1;
1439 skip_bits(&s->gb, 3); // asset index
1440
1441 if (s->static_fields) {
1442 if (get_bits1(&s->gb))
1443 skip_bits(&s->gb, 4); // asset type descriptor
1444 if (get_bits1(&s->gb))
1445 skip_bits_long(&s->gb, 24); // language descriptor
1446
1447 if (get_bits1(&s->gb)) {
1448 /* How can one fit 1024 bytes of text here if the maximum value
1449 * for the asset header size field above was 512 bytes? */
1450 int text_length = get_bits(&s->gb, 10) + 1;
1451 if (get_bits_left(&s->gb) < text_length * 8)
1452 return -1;
1453 skip_bits_long(&s->gb, text_length * 8); // info text
1454 }
1455
1456 skip_bits(&s->gb, 5); // bit resolution - 1
1457 skip_bits(&s->gb, 4); // max sample rate code
1458 channels = get_bits(&s->gb, 8) + 1;
1459
1460 if (get_bits1(&s->gb)) { // 1-to-1 channels to speakers
1461 int spkr_remap_sets;
1462 int spkr_mask_size = 16;
1463 int num_spkrs[7];
1464
1465 if (channels > 2)
1466 embedded_stereo = get_bits1(&s->gb);
1467 if (channels > 6)
1468 embedded_6ch = get_bits1(&s->gb);
1469
1470 if (get_bits1(&s->gb)) {
1471 spkr_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
1472 skip_bits(&s->gb, spkr_mask_size); // spkr activity mask
1473 }
1474
1475 spkr_remap_sets = get_bits(&s->gb, 3);
1476
1477 for (i = 0; i < spkr_remap_sets; i++) {
1478 /* std layout mask for each remap set */
1479 num_spkrs[i] = dca_exss_mask2count(get_bits(&s->gb, spkr_mask_size));
1480 }
1481
1482 for (i = 0; i < spkr_remap_sets; i++) {
1483 int num_dec_ch_remaps = get_bits(&s->gb, 5) + 1;
1484 if (get_bits_left(&s->gb) < 0)
1485 return -1;
1486
1487 for (j = 0; j < num_spkrs[i]; j++) {
1488 int remap_dec_ch_mask = get_bits_long(&s->gb, num_dec_ch_remaps);
1489 int num_dec_ch = av_popcount(remap_dec_ch_mask);
1490 skip_bits_long(&s->gb, num_dec_ch * 5); // remap codes
1491 }
1492 }
1493
1494 } else {
1495 skip_bits(&s->gb, 3); // representation type
1496 }
1497 }
1498
1499 drc_code_present = get_bits1(&s->gb);
1500 if (drc_code_present)
1501 get_bits(&s->gb, 8); // drc code
1502
1503 if (get_bits1(&s->gb))
1504 skip_bits(&s->gb, 5); // dialog normalization code
1505
1506 if (drc_code_present && embedded_stereo)
1507 get_bits(&s->gb, 8); // drc stereo code
1508
1509 if (s->mix_metadata && get_bits1(&s->gb)) {
1510 skip_bits(&s->gb, 1); // external mix
1511 skip_bits(&s->gb, 6); // post mix gain code
1512
1513 if (get_bits(&s->gb, 2) != 3) // mixer drc code
1514 skip_bits(&s->gb, 3); // drc limit
1515 else
1516 skip_bits(&s->gb, 8); // custom drc code
1517
1518 if (get_bits1(&s->gb)) // channel specific scaling
1519 for (i = 0; i < s->num_mix_configs; i++)
1520 skip_bits_long(&s->gb, s->mix_config_num_ch[i] * 6); // scale codes
1521 else
1522 skip_bits_long(&s->gb, s->num_mix_configs * 6); // scale codes
1523
1524 for (i = 0; i < s->num_mix_configs; i++) {
1525 if (get_bits_left(&s->gb) < 0)
1526 return -1;
1527 dca_exss_skip_mix_coeffs(&s->gb, channels, s->mix_config_num_ch[i]);
1528 if (embedded_6ch)
1529 dca_exss_skip_mix_coeffs(&s->gb, 6, s->mix_config_num_ch[i]);
1530 if (embedded_stereo)
1531 dca_exss_skip_mix_coeffs(&s->gb, 2, s->mix_config_num_ch[i]);
1532 }
1533 }
1534
1535 switch (get_bits(&s->gb, 2)) {
1536 case 0: extensions_mask = get_bits(&s->gb, 12); break;
1537 case 1: extensions_mask = DCA_EXT_EXSS_XLL; break;
1538 case 2: extensions_mask = DCA_EXT_EXSS_LBR; break;
1539 case 3: extensions_mask = 0; /* aux coding */ break;
1540 }
1541
1542 /* not parsed further, we were only interested in the extensions mask */
1543
1544 if (get_bits_left(&s->gb) < 0)
1545 return -1;
1546
1547 if (get_bits_count(&s->gb) - header_pos > header_size * 8) {
1548 av_log(s->avctx, AV_LOG_WARNING, "Asset header size mismatch.\n");
1549 return -1;
1550 }
1551 skip_bits_long(&s->gb, header_pos + header_size * 8 - get_bits_count(&s->gb));
1552
1553 if (extensions_mask & DCA_EXT_EXSS_XLL)
1554 s->profile = FF_PROFILE_DTS_HD_MA;
1555 else if (extensions_mask & (DCA_EXT_EXSS_XBR | DCA_EXT_EXSS_X96 |
1556 DCA_EXT_EXSS_XXCH))
1557 s->profile = FF_PROFILE_DTS_HD_HRA;
1558
1559 if (!(extensions_mask & DCA_EXT_CORE))
1560 av_log(s->avctx, AV_LOG_WARNING, "DTS core detection mismatch.\n");
1561 if ((extensions_mask & DCA_CORE_EXTS) != s->core_ext_mask)
1562 av_log(s->avctx, AV_LOG_WARNING,
1563 "DTS extensions detection mismatch (%d, %d)\n",
1564 extensions_mask & DCA_CORE_EXTS, s->core_ext_mask);
1565
1566 return 0;
1567}
1568
1569static int dca_xbr_parse_frame(DCAContext *s)
1570{
1571 int scale_table_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS][2];
1572 int active_bands[DCA_CHSETS_MAX][DCA_CHSET_CHANS_MAX];
1573 int abits_high[DCA_CHSET_CHANS_MAX][DCA_SUBBANDS];
1574 int anctemp[DCA_CHSET_CHANS_MAX];
1575 int chset_fsize[DCA_CHSETS_MAX];
1576 int n_xbr_ch[DCA_CHSETS_MAX];
1577 int hdr_size, num_chsets, xbr_tmode, hdr_pos;
1578 int i, j, k, l, chset, chan_base;
1579 LOCAL_ALIGNED_16(int, block, [8]); // fixed by K.Y.H
1580
1581 av_log(s->avctx, AV_LOG_DEBUG, "DTS-XBR: decoding XBR extension\n");
1582
1583 /* get bit position of sync header */
1584 hdr_pos = get_bits_count(&s->gb) - 32;
1585
1586 hdr_size = get_bits(&s->gb, 6) + 1;
1587 num_chsets = get_bits(&s->gb, 2) + 1;
1588
1589 for(i = 0; i < num_chsets; i++)
1590 chset_fsize[i] = get_bits(&s->gb, 14) + 1;
1591
1592 xbr_tmode = get_bits1(&s->gb);
1593
1594 for(i = 0; i < num_chsets; i++) {
1595 n_xbr_ch[i] = get_bits(&s->gb, 3) + 1;
1596 k = get_bits(&s->gb, 2) + 5;
1597 for(j = 0; j < n_xbr_ch[i]; j++)
1598 active_bands[i][j] = get_bits(&s->gb, k) + 1;
1599 }
1600
1601 /* skip to the end of the header */
1602 i = get_bits_count(&s->gb);
1603 if(hdr_pos + hdr_size * 8 > i)
1604 skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i);
1605
1606 /* loop over the channel data sets */
1607 /* only decode as many channels as we've decoded base data for */
1608 for(chset = 0, chan_base = 0;
1609 chset < num_chsets && chan_base + n_xbr_ch[chset] <= s->prim_channels;
1610 chan_base += n_xbr_ch[chset++]) {
1611 int start_posn = get_bits_count(&s->gb);
1612 int subsubframe = 0;
1613 int subframe = 0;
1614
1615 /* loop over subframes */
1616 for (k = 0; k < (s->sample_blocks / 8); k++) {
1617 /* parse header if we're on first subsubframe of a block */
1618 if(subsubframe == 0) {
1619 /* Parse subframe header */
1620 for(i = 0; i < n_xbr_ch[chset]; i++) {
1621 anctemp[i] = get_bits(&s->gb, 2) + 2;
1622 }
1623
1624 for(i = 0; i < n_xbr_ch[chset]; i++) {
1625 get_array(&s->gb, abits_high[i], active_bands[chset][i], anctemp[i]);
1626 }
1627
1628 for(i = 0; i < n_xbr_ch[chset]; i++) {
1629 anctemp[i] = get_bits(&s->gb, 3);
1630 if(anctemp[i] < 1) {
1631 av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: SYNC ERROR\n");
1632 return AVERROR_INVALIDDATA;
1633 }
1634 }
1635
1636 /* generate scale factors */
1637 for(i = 0; i < n_xbr_ch[chset]; i++) {
1638 const uint32_t *scale_table;
1639 int nbits;
1640
1641 if (s->scalefactor_huffman[chan_base+i] == 6) {
1642 scale_table = scale_factor_quant7;
1643 } else {
1644 scale_table = scale_factor_quant6;
1645 }
1646
1647 nbits = anctemp[i];
1648
1649 for(j = 0; j < active_bands[chset][i]; j++) {
1650 if(abits_high[i][j] > 0) {
1651 scale_table_high[i][j][0] =
1652 scale_table[get_bits(&s->gb, nbits)];
1653
1654 if(xbr_tmode && s->transition_mode[i][j]) {
1655 scale_table_high[i][j][1] =
1656 scale_table[get_bits(&s->gb, nbits)];
1657 }
1658 }
1659 }
1660 }
1661 }
1662
1663 /* decode audio array for this block */
1664 for(i = 0; i < n_xbr_ch[chset]; i++) {
1665 for(j = 0; j < active_bands[chset][i]; j++) {
1666 const int xbr_abits = abits_high[i][j];
1667 const float quant_step_size = lossless_quant_d[xbr_abits];
1668 const int sfi = xbr_tmode && s->transition_mode[i][j] && subsubframe >= s->transition_mode[i][j];
1669 const float rscale = quant_step_size * scale_table_high[i][j][sfi];
1670 float *subband_samples = s->subband_samples[k][chan_base+i][j];
1671 //int block[8];
1672
1673 if(xbr_abits <= 0)
1674 continue;
1675
1676 if(xbr_abits > 7) {
1677 get_array(&s->gb, block, 8, xbr_abits - 3);
1678 } else {
1679 int block_code1, block_code2, size, levels, err;
1680
1681 size = abits_sizes[xbr_abits - 1];
1682 levels = abits_levels[xbr_abits - 1];
1683
1684 block_code1 = get_bits(&s->gb, size);
1685 block_code2 = get_bits(&s->gb, size);
1686 err = decode_blockcodes(block_code1, block_code2,
1687 levels, block);
1688 if (err) {
1689 av_log(s->avctx, AV_LOG_ERROR,
1690 "ERROR: DTS-XBR: block code look-up failed\n");
1691 return AVERROR_INVALIDDATA;
1692 }
1693 }
1694
1695 /* scale & sum into subband */
1696 for(l = 0; l < 8; l++)
1697 subband_samples[l] += (float)block[l] * rscale;
1698 }
1699 }
1700
1701 /* check DSYNC marker */
1702 if(s->aspf || subsubframe == s->subsubframes[subframe] - 1) {
1703 if(get_bits(&s->gb, 16) != 0xffff) {
1704 av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: Didn't get subframe DSYNC\n");
1705 return AVERROR_INVALIDDATA;
1706 }
1707 }
1708
1709 /* advance sub-sub-frame index */
1710 if(++subsubframe >= s->subsubframes[subframe]) {
1711 subsubframe = 0;
1712 subframe++;
1713 }
1714 }
1715
1716 /* skip to next channel set */
1717 i = get_bits_count(&s->gb);
1718 if(start_posn + chset_fsize[chset] * 8 != i) {
1719 j = start_posn + chset_fsize[chset] * 8 - i;
1720 if(j < 0 || j >= 8)
1721 av_log(s->avctx, AV_LOG_ERROR, "DTS-XBR: end of channel set,"
1722 " skipping further than expected (%d bits)\n", j);
1723 skip_bits_long(&s->gb, j);
1724 }
1725 }
1726
1727 return 0;
1728}
1729
1730/**
1731 * Parse extension substream header (HD)
1732 */
1733static void dca_exss_parse_header(DCAContext *s)
1734{
1735 int ss_index;
1736 int blownup;
1737 int num_audiop = 1;
1738 int num_assets = 1;
1739 int active_ss_mask[8];
1740 int i, j;
1741 int start_posn;
1742 int hdrsize;
1743 uint32_t mkr;
1744
1745 if (get_bits_left(&s->gb) < 52)
1746 return;
1747
1748 start_posn = get_bits_count(&s->gb) - 32;
1749
1750 skip_bits(&s->gb, 8); // user data
1751 ss_index = get_bits(&s->gb, 2);
1752
1753 blownup = get_bits1(&s->gb);
1754 hdrsize = get_bits(&s->gb, 8 + 4 * blownup) + 1; // header_size
1755 skip_bits(&s->gb, 16 + 4 * blownup); // hd_size
1756
1757 s->static_fields = get_bits1(&s->gb);
1758 if (s->static_fields) {
1759 skip_bits(&s->gb, 2); // reference clock code
1760 skip_bits(&s->gb, 3); // frame duration code
1761
1762 if (get_bits1(&s->gb))
1763 skip_bits_long(&s->gb, 36); // timestamp
1764
1765 /* a single stream can contain multiple audio assets that can be
1766 * combined to form multiple audio presentations */
1767
1768 num_audiop = get_bits(&s->gb, 3) + 1;
1769 if (num_audiop > 1) {
1770 av_log_ask_for_sample(s->avctx, "Multiple DTS-HD audio presentations.");
1771 /* ignore such streams for now */
1772 return;
1773 }
1774
1775 num_assets = get_bits(&s->gb, 3) + 1;
1776 if (num_assets > 1) {
1777 av_log_ask_for_sample(s->avctx, "Multiple DTS-HD audio assets.");
1778 /* ignore such streams for now */
1779 return;
1780 }
1781
1782 for (i = 0; i < num_audiop; i++)
1783 active_ss_mask[i] = get_bits(&s->gb, ss_index + 1);
1784
1785 for (i = 0; i < num_audiop; i++)
1786 for (j = 0; j <= ss_index; j++)
1787 if (active_ss_mask[i] & (1 << j))
1788 skip_bits(&s->gb, 8); // active asset mask
1789
1790 s->mix_metadata = get_bits1(&s->gb);
1791 if (s->mix_metadata) {
1792 int mix_out_mask_size;
1793
1794 skip_bits(&s->gb, 2); // adjustment level
1795 mix_out_mask_size = (get_bits(&s->gb, 2) + 1) << 2;
1796 s->num_mix_configs = get_bits(&s->gb, 2) + 1;
1797
1798 for (i = 0; i < s->num_mix_configs; i++) {
1799 int mix_out_mask = get_bits(&s->gb, mix_out_mask_size);
1800 s->mix_config_num_ch[i] = dca_exss_mask2count(mix_out_mask);
1801 }
1802 }
1803 }
1804
1805 for (i = 0; i < num_assets; i++)
1806 skip_bits_long(&s->gb, 16 + 4 * blownup); // asset size
1807
1808 for (i = 0; i < num_assets; i++) {
1809 if (dca_exss_parse_asset_header(s))
1810 return;
1811 }
1812
1813 /* not parsed further, we were only interested in the extensions mask
1814 * from the asset header */
1815
1816 if(num_assets > 0) {
1817 j = get_bits_count(&s->gb);
1818 if(start_posn + hdrsize * 8 > j)
1819 skip_bits_long(&s->gb, start_posn + hdrsize * 8 - j);
1820
1821 /* check first asset for XBR -- should also check extension mask! */
1822 mkr = get_bits_long(&s->gb, 32);
1823
1824 if(mkr == 0x655e315e)
1825 dca_xbr_parse_frame(s);
1826 }
1827}
1828
1829/**
1830 * Main frame decoding function
1831 * FIXME add arguments
1832 */
1833static int dca_decode_frame(AVCodecContext *avctx, void *data,
1834 int *got_frame_ptr, AVPacket *avpkt)
1835{
1836 const uint8_t *buf = avpkt->data;
1837 int buf_size = avpkt->size;
1838
1839 int lfe_samples;
1840 int num_core_channels = 0;
1841 int i, ret;
1842 float *samples_flt;
1843 int16_t *samples_s16;
1844 DCAContext *s = avctx->priv_data;
1845 int channels;
1846 int core_ss_end;
1847
1848
1849 s->xch_present = 0;
1850
1851 s->dca_buffer_size = ff_dca_convert_bitstream(buf, buf_size, s->dca_buffer,
1852 DCA_MAX_FRAME_SIZE + DCA_MAX_EXSS_HEADER_SIZE);
1853 if (s->dca_buffer_size == AVERROR_INVALIDDATA) {
1854 av_log(avctx, AV_LOG_ERROR, "Not a valid DCA frame\n");
1855 return AVERROR_INVALIDDATA;
1856 }
1857
1858 init_get_bits(&s->gb, s->dca_buffer, s->dca_buffer_size * 8);
1859 if ((ret = dca_parse_frame_header(s)) < 0) {
1860 //seems like the frame is corrupt, try with the next one
1861 return ret;
1862 }
1863 //set AVCodec values with parsed data
1864 avctx->sample_rate = s->sample_rate;
1865 avctx->bit_rate = s->bit_rate;
1866
1867 s->profile = FF_PROFILE_DTS;
1868
1869 for (i = 0; i < (s->sample_blocks / 8); i++) {
1870 if ((ret = dca_decode_block(s, 0, i))) {
1871 av_log(avctx, AV_LOG_ERROR, "error decoding block\n");
1872 return ret;
1873 }
1874 }
1875
1876 /* record number of core channels incase less than max channels are requested */
1877 num_core_channels = s->prim_channels;
1878
1879 if (s->ext_coding)
1880 s->core_ext_mask = dca_ext_audio_descr_mask[s->ext_descr];
1881 else
1882 s->core_ext_mask = 0;
1883
1884 core_ss_end = FFMIN(s->frame_size, s->dca_buffer_size) * 8;
1885
1886 /* only scan for extensions if ext_descr was unknown or indicated a
1887 * supported XCh extension */
1888 if (s->core_ext_mask < 0 || s->core_ext_mask & DCA_EXT_XCH) {
1889
1890 /* if ext_descr was unknown, clear s->core_ext_mask so that the
1891 * extensions scan can fill it up */
1892 s->core_ext_mask = FFMAX(s->core_ext_mask, 0);
1893
1894 /* extensions start at 32-bit boundaries into bitstream */
1895 skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
1896
1897 while (core_ss_end - get_bits_count(&s->gb) >= 32) {
1898 uint32_t bits = get_bits_long(&s->gb, 32);
1899
1900 switch (bits) {
1901 case 0x5a5a5a5a: {
1902 int ext_amode, xch_fsize;
1903
1904 s->xch_base_channel = s->prim_channels;
1905
1906 /* validate sync word using XCHFSIZE field */
1907 xch_fsize = show_bits(&s->gb, 10);
1908 if ((s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize) &&
1909 (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + xch_fsize + 1))
1910 continue;
1911
1912 /* skip length-to-end-of-frame field for the moment */
1913 skip_bits(&s->gb, 10);
1914
1915 s->core_ext_mask |= DCA_EXT_XCH;
1916
1917 /* extension amode(number of channels in extension) should be 1 */
1918 /* AFAIK XCh is not used for more channels */
1919 if ((ext_amode = get_bits(&s->gb, 4)) != 1) {
1920 av_log(avctx, AV_LOG_ERROR, "XCh extension amode %d not"
1921 " supported!\n", ext_amode);
1922 continue;
1923 }
1924
1925 /* much like core primary audio coding header */
1926 dca_parse_audio_coding_header(s, s->xch_base_channel);
1927
1928 for (i = 0; i < (s->sample_blocks / 8); i++)
1929 if ((ret = dca_decode_block(s, s->xch_base_channel, i))) {
1930 av_log(avctx, AV_LOG_ERROR, "error decoding XCh extension\n");
1931 continue;
1932 }
1933
1934 s->xch_present = 1;
1935 break;
1936 }
1937 case 0x47004a03:
1938 /* XXCh: extended channels */
1939 /* usually found either in core or HD part in DTS-HD HRA streams,
1940 * but not in DTS-ES which contains XCh extensions instead */
1941 s->core_ext_mask |= DCA_EXT_XXCH;
1942 break;
1943
1944 case 0x1d95f262: {
1945 int fsize96 = show_bits(&s->gb, 12) + 1;
1946 if (s->frame_size != (get_bits_count(&s->gb) >> 3) - 4 + fsize96)
1947 continue;
1948
1949 av_log(avctx, AV_LOG_DEBUG, "X96 extension found at %d bits\n",
1950 get_bits_count(&s->gb));
1951 skip_bits(&s->gb, 12);
1952 av_log(avctx, AV_LOG_DEBUG, "FSIZE96 = %d bytes\n", fsize96);
1953 av_log(avctx, AV_LOG_DEBUG, "REVNO = %d\n", get_bits(&s->gb, 4));
1954
1955 s->core_ext_mask |= DCA_EXT_X96;
1956 break;
1957 }
1958 }
1959
1960 skip_bits_long(&s->gb, (-get_bits_count(&s->gb)) & 31);
1961 }
1962 } else {
1963 /* no supported extensions, skip the rest of the core substream */
1964 skip_bits_long(&s->gb, core_ss_end - get_bits_count(&s->gb));
1965 }
1966
1967 if (s->core_ext_mask & DCA_EXT_X96)
1968 s->profile = FF_PROFILE_DTS_96_24;
1969 else if (s->core_ext_mask & (DCA_EXT_XCH | DCA_EXT_XXCH))
1970 s->profile = FF_PROFILE_DTS_ES;
1971
1972 /* check for ExSS (HD part) */
1973 if (s->dca_buffer_size - s->frame_size > 32 &&
1974 get_bits_long(&s->gb, 32) == DCA_HD_MARKER)
1975 dca_exss_parse_header(s);
1976
1977 avctx->profile = s->profile;
1978
1979 channels = s->prim_channels + !!s->lfe;
1980
1981 if (s->amode < 16) {
1982 avctx->channel_layout = dca_core_channel_layout[s->amode];
1983
1984 if (s->xch_present && (!avctx->request_channels ||
1985 avctx->request_channels > num_core_channels + !!s->lfe)) {
1986 avctx->channel_layout |= AV_CH_BACK_CENTER;
1987 if (s->lfe) {
1988 avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
1989 s->channel_order_tab = dca_channel_reorder_lfe_xch[s->amode];
1990 } else {
1991 s->channel_order_tab = dca_channel_reorder_nolfe_xch[s->amode];
1992 }
1993 } else {
1994 channels = num_core_channels + !!s->lfe;
1995 s->xch_present = 0; /* disable further xch processing */
1996 if (s->lfe) {
1997 avctx->channel_layout |= AV_CH_LOW_FREQUENCY;
1998 s->channel_order_tab = dca_channel_reorder_lfe[s->amode];
1999 } else
2000 s->channel_order_tab = dca_channel_reorder_nolfe[s->amode];
2001 }
2002
2003 if (channels > !!s->lfe &&
2004 s->channel_order_tab[channels - 1 - !!s->lfe] < 0)
2005 return AVERROR_INVALIDDATA;
2006
2007 if (avctx->request_channels == 2 && s->prim_channels > 2) {
2008 channels = 2;
2009 s->output = DCA_STEREO;
2010 avctx->channel_layout = AV_CH_LAYOUT_STEREO;
2011 }
2012 else if (avctx->request_channel_layout & AV_CH_LAYOUT_NATIVE) {
2013 static const int8_t dca_channel_order_native[9] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
2014 s->channel_order_tab = dca_channel_order_native;
2015 }
2016 } else {
2017 av_log(avctx, AV_LOG_ERROR, "Non standard configuration %d !\n", s->amode);
2018 return AVERROR_INVALIDDATA;
2019 }
2020
2021 if (avctx->channels != channels) {
2022 if (avctx->channels)
2023 av_log(avctx, AV_LOG_INFO, "Number of channels changed in DCA decoder (%d -> %d)\n", avctx->channels, channels);
2024 avctx->channels = channels;
2025 }
2026
2027 /* get output buffer */
2028 s->frame.nb_samples = 256 * (s->sample_blocks / 8);
2029 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
2030 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
2031 return ret;
2032 }
2033 samples_flt = (float *) s->frame.data[0];
2034 samples_s16 = (int16_t *) s->frame.data[0];
2035
2036 /* filter to get final output */
2037 for (i = 0; i < (s->sample_blocks / 8); i++) {
2038 dca_filter_channels(s, i);
2039
2040 /* If this was marked as a DTS-ES stream we need to subtract back- */
2041 /* channel from SL & SR to remove matrixed back-channel signal */
2042 if ((s->source_pcm_res & 1) && s->xch_present) {
2043 float *back_chan = s->samples + s->channel_order_tab[s->xch_base_channel] * 256;
2044 float *lt_chan = s->samples + s->channel_order_tab[s->xch_base_channel - 2] * 256;
2045 float *rt_chan = s->samples + s->channel_order_tab[s->xch_base_channel - 1] * 256;
2046 s->dsp.vector_fmac_scalar(lt_chan, back_chan, -M_SQRT1_2, 256);
2047 s->dsp.vector_fmac_scalar(rt_chan, back_chan, -M_SQRT1_2, 256);
2048 }
2049
2050 if (avctx->sample_fmt == AV_SAMPLE_FMT_FLT) {
2051 s->fmt_conv.float_interleave(samples_flt, s->samples_chanptr, 256,
2052 channels);
2053 samples_flt += 256 * channels;
2054 } else {
2055 s->fmt_conv.float_to_int16_interleave(samples_s16,
2056 s->samples_chanptr, 256,
2057 channels);
2058 samples_s16 += 256 * channels;
2059 }
2060 }
2061
2062 /* update lfe history */
2063 lfe_samples = 2 * s->lfe * (s->sample_blocks / 8);
2064 for (i = 0; i < 2 * s->lfe * 4; i++)
2065 s->lfe_data[i] = s->lfe_data[i + lfe_samples];
2066
2067 *got_frame_ptr = 1;
2068 *(AVFrame *) data = s->frame;
2069
2070 return buf_size;
2071}
2072
2073
2074
2075/**
2076 * DCA initialization
2077 *
2078 * @param avctx pointer to the AVCodecContext
2079 */
2080
2081static av_cold int dca_decode_init(AVCodecContext *avctx)
2082{
2083 DCAContext *s = avctx->priv_data;
2084 int i;
2085
2086 s->avctx = avctx;
2087 dca_init_vlcs();
2088
2089 ff_dsputil_init(&s->dsp, avctx);
2090 ff_mdct_init(&s->imdct, 6, 1, 1.0);
2091 ff_synth_filter_init(&s->synth);
2092 ff_dcadsp_init(&s->dcadsp);
2093 ff_fmt_convert_init(&s->fmt_conv, avctx);
2094
2095 for (i = 0; i < DCA_PRIM_CHANNELS_MAX + 1; i++)
2096 s->samples_chanptr[i] = s->samples + i * 256;
2097
2098 if (avctx->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
2099 avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
2100 s->scale_bias = 1.0 / 32768.0;
2101 } else {
2102 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
2103 s->scale_bias = 1.0;
2104 }
2105
2106 /* allow downmixing to stereo */
2107 if (avctx->channels > 0 && avctx->request_channels < avctx->channels &&
2108 avctx->request_channels == 2) {
2109 avctx->channels = avctx->request_channels;
2110 }
2111
2112 avcodec_get_frame_defaults(&s->frame);
2113 avctx->coded_frame = &s->frame;
2114
2115 return 0;
2116}
2117
2118static av_cold int dca_decode_end(AVCodecContext *avctx)
2119{
2120 DCAContext *s = avctx->priv_data;
2121 ff_mdct_end(&s->imdct);
2122 return 0;
2123}
2124
2125static const AVProfile profiles[] = {
2126 { FF_PROFILE_DTS, "DTS" },
2127 { FF_PROFILE_DTS_ES, "DTS-ES" },
2128 { FF_PROFILE_DTS_96_24, "DTS 96/24" },
2129 { FF_PROFILE_DTS_HD_HRA, "DTS-HD HRA" },
2130 { FF_PROFILE_DTS_HD_MA, "DTS-HD MA" },
2131 { FF_PROFILE_UNKNOWN },
2132};
2133
2134AVCodec ff_dca_decoder = {
2135 .name = "dca",
2136 .type = AVMEDIA_TYPE_AUDIO,
2137 .id = CODEC_ID_DTS,
2138 .priv_data_size = sizeof(DCAContext),
2139 .init = dca_decode_init,
2140 .decode = dca_decode_frame,
2141 .close = dca_decode_end,
2142 .long_name = NULL_IF_CONFIG_SMALL("DCA (DTS Coherent Acoustics)"),
2143 .capabilities = CODEC_CAP_CHANNEL_CONF | CODEC_CAP_DR1,
2144 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLT,
2145 AV_SAMPLE_FMT_S16,
2146 AV_SAMPLE_FMT_NONE },
2147 .profiles = NULL_IF_CONFIG_SMALL(profiles),
2148};