GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/takdec.c Lines: 353 525 67.2 %
Date: 2021-01-22 05:18:52 Branches: 180 327 55.0 %

Line Branch Exec Source
1
/*
2
 * TAK decoder
3
 * Copyright (c) 2012 Paul B Mahol
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21
22
/**
23
 * @file
24
 * TAK (Tom's lossless Audio Kompressor) decoder
25
 * @author Paul B Mahol
26
 */
27
28
#include "libavutil/internal.h"
29
#include "libavutil/mem_internal.h"
30
#include "libavutil/samplefmt.h"
31
32
#define BITSTREAM_READER_LE
33
#include "audiodsp.h"
34
#include "thread.h"
35
#include "avcodec.h"
36
#include "internal.h"
37
#include "unary.h"
38
#include "tak.h"
39
#include "takdsp.h"
40
41
#define MAX_SUBFRAMES     8                         ///< max number of subframes per channel
42
#define MAX_PREDICTORS  256
43
44
typedef struct MCDParam {
45
    int8_t present;                                 ///< decorrelation parameter availability for this channel
46
    int8_t index;                                   ///< index into array of decorrelation types
47
    int8_t chan1;
48
    int8_t chan2;
49
} MCDParam;
50
51
typedef struct TAKDecContext {
52
    AVCodecContext *avctx;                          ///< parent AVCodecContext
53
    AudioDSPContext adsp;
54
    TAKDSPContext   tdsp;
55
    TAKStreamInfo   ti;
56
    GetBitContext   gb;                             ///< bitstream reader initialized to start at the current frame
57
58
    int             uval;
59
    int             nb_samples;                     ///< number of samples in the current frame
60
    uint8_t        *decode_buffer;
61
    unsigned int    decode_buffer_size;
62
    int32_t        *decoded[TAK_MAX_CHANNELS];      ///< decoded samples for each channel
63
64
    int8_t          lpc_mode[TAK_MAX_CHANNELS];
65
    int8_t          sample_shift[TAK_MAX_CHANNELS]; ///< shift applied to every sample in the channel
66
    int16_t         predictors[MAX_PREDICTORS];
67
    int             nb_subframes;                   ///< number of subframes in the current frame
68
    int16_t         subframe_len[MAX_SUBFRAMES];    ///< subframe length in samples
69
    int             subframe_scale;
70
71
    int8_t          dmode;                          ///< channel decorrelation type in the current frame
72
73
    MCDParam        mcdparams[TAK_MAX_CHANNELS];    ///< multichannel decorrelation parameters
74
75
    int8_t          coding_mode[128];
76
    DECLARE_ALIGNED(16, int16_t, filter)[MAX_PREDICTORS];
77
    DECLARE_ALIGNED(16, int16_t, residues)[544];
78
} TAKDecContext;
79
80
static const int8_t mc_dmodes[] = { 1, 3, 4, 6, };
81
82
static const uint16_t predictor_sizes[] = {
83
    4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0,
84
};
85
86
static const struct CParam {
87
    int init;
88
    int escape;
89
    int scale;
90
    int aescape;
91
    int bias;
92
} xcodes[50] = {
93
    { 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 },
94
    { 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 },
95
    { 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D },
96
    { 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 },
97
    { 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 },
98
    { 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 },
99
    { 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 },
100
    { 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 },
101
    { 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 },
102
    { 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 },
103
    { 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 },
104
    { 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 },
105
    { 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 },
106
    { 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 },
107
    { 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 },
108
    { 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 },
109
    { 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 },
110
    { 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 },
111
    { 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 },
112
    { 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 },
113
    { 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 },
114
    { 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 },
115
    { 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 },
116
    { 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 },
117
    { 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 },
118
    { 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 },
119
    { 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 },
120
    { 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 },
121
    { 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 },
122
    { 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 },
123
    { 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 },
124
    { 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 },
125
    { 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 },
126
    { 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 },
127
    { 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 },
128
    { 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 },
129
    { 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 },
130
    { 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 },
131
    { 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 },
132
    { 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 },
133
    { 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 },
134
    { 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 },
135
    { 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 },
136
    { 0x17, 0x0300000, 0x0300000, 0x0D00000, 0x1800000 },
137
    { 0x18, 0x0B00000, 0x0400000, 0x1C00000, 0x1900000 },
138
    { 0x18, 0x0600000, 0x0600000, 0x1A00000, 0x3000000 },
139
    { 0x19, 0x1600000, 0x0800000, 0x3800000, 0x3200000 },
140
    { 0x19, 0x0C00000, 0x0C00000, 0x3400000, 0x6000000 },
141
    { 0x1A, 0x2C00000, 0x1000000, 0x7000000, 0x6400000 },
142
    { 0x1A, 0x1800000, 0x1800000, 0x6800000, 0xC000000 },
143
};
144
145
41
static int set_bps_params(AVCodecContext *avctx)
146
{
147

41
    switch (avctx->bits_per_raw_sample) {
148
    case 8:
149
        avctx->sample_fmt = AV_SAMPLE_FMT_U8P;
150
        break;
151
41
    case 16:
152
41
        avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
153
41
        break;
154
    case 24:
155
        avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
156
        break;
157
    default:
158
        av_log(avctx, AV_LOG_ERROR, "invalid/unsupported bits per sample: %d\n",
159
               avctx->bits_per_raw_sample);
160
        return AVERROR_INVALIDDATA;
161
    }
162
163
41
    return 0;
164
}
165
166
2
static void set_sample_rate_params(AVCodecContext *avctx)
167
{
168
2
    TAKDecContext *s  = avctx->priv_data;
169
    int shift;
170
171
2
    if (avctx->sample_rate < 11025) {
172
        shift = 3;
173
2
    } else if (avctx->sample_rate < 22050) {
174
        shift = 2;
175
2
    } else if (avctx->sample_rate < 44100) {
176
        shift = 1;
177
    } else {
178
2
        shift = 0;
179
    }
180
2
    s->uval           = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << shift;
181
2
    s->subframe_scale = FFALIGN(avctx->sample_rate + 511LL >> 9, 4) << 1;
182
2
}
183
184
2
static av_cold int tak_decode_init(AVCodecContext *avctx)
185
{
186
2
    TAKDecContext *s = avctx->priv_data;
187
188
2
    ff_audiodsp_init(&s->adsp);
189
2
    ff_takdsp_init(&s->tdsp);
190
191
2
    s->avctx = avctx;
192
2
    avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
193
194
2
    set_sample_rate_params(avctx);
195
196
2
    return set_bps_params(avctx);
197
}
198
199
124
static void decode_lpc(int32_t *coeffs, int mode, int length)
200
{
201
    int i;
202
203
124
    if (length < 2)
204
        return;
205
206
124
    if (mode == 1) {
207
117
        unsigned a1 = *coeffs++;
208
431176
        for (i = 0; i < length - 1 >> 1; i++) {
209
431059
            *coeffs   += a1;
210
431059
            coeffs[1] += (unsigned)*coeffs;
211
431059
            a1         = coeffs[1];
212
431059
            coeffs    += 2;
213
        }
214
117
        if (length - 1 & 1)
215
39
            *coeffs += a1;
216
7
    } else if (mode == 2) {
217
7
        unsigned a1    = coeffs[1];
218
7
        unsigned a2    = a1 + *coeffs;
219
7
        coeffs[1] = a2;
220
7
        if (length > 2) {
221
7
            coeffs += 2;
222
258
            for (i = 0; i < length - 2 >> 1; i++) {
223
251
                unsigned a3    = *coeffs + a1;
224
251
                unsigned a4    = a3 + a2;
225
251
                *coeffs   = a4;
226
251
                a1        = coeffs[1] + a3;
227
251
                a2        = a1 + a4;
228
251
                coeffs[1] = a2;
229
251
                coeffs   += 2;
230
            }
231
7
            if (length & 1)
232
                *coeffs += a1 + a2;
233
        }
234
    } else if (mode == 3) {
235
        unsigned a1    = coeffs[1];
236
        unsigned a2    = a1 + *coeffs;
237
        coeffs[1] = a2;
238
        if (length > 2) {
239
            unsigned a3  = coeffs[2];
240
            unsigned a4  = a3 + a1;
241
            unsigned a5  = a4 + a2;
242
            coeffs[2] = a5;
243
            coeffs += 3;
244
            for (i = 0; i < length - 3; i++) {
245
                a3     += *coeffs;
246
                a4     += a3;
247
                a5     += a4;
248
                *coeffs = a5;
249
                coeffs++;
250
            }
251
        }
252
    }
253
}
254
255
3970
static int decode_segment(TAKDecContext *s, int8_t mode, int32_t *decoded, int len)
256
{
257
    struct CParam code;
258
3970
    GetBitContext *gb = &s->gb;
259
    int i;
260
261
3970
    if (!mode) {
262
        memset(decoded, 0, len * sizeof(*decoded));
263
        return 0;
264
    }
265
266
3970
    if (mode > FF_ARRAY_ELEMS(xcodes))
267
        return AVERROR_INVALIDDATA;
268
3970
    code = xcodes[mode - 1];
269
270
863842
    for (i = 0; i < len; i++) {
271
859872
        unsigned x = get_bits_long(gb, code.init);
272

859872
        if (x >= code.escape && get_bits1(gb)) {
273
186781
            x |= 1 << code.init;
274
186781
            if (x >= code.aescape) {
275
138466
                unsigned scale = get_unary(gb, 1, 9);
276
138466
                if (scale == 9) {
277
164
                    int scale_bits = get_bits(gb, 3);
278
164
                    if (scale_bits > 0) {
279
109
                        if (scale_bits == 7) {
280
                            scale_bits += get_bits(gb, 5);
281
                            if (scale_bits > 29)
282
                                return AVERROR_INVALIDDATA;
283
                        }
284
109
                        scale = get_bits_long(gb, scale_bits) + 1;
285
109
                        x    += code.scale * scale;
286
                    }
287
164
                    x += code.bias;
288
                } else
289
138302
                    x += code.scale * scale - code.escape;
290
            } else
291
48315
                x -= code.escape;
292
        }
293
859872
        decoded[i] = (x >> 1) ^ -(x & 1);
294
    }
295
296
3970
    return 0;
297
}
298
299
346
static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
300
{
301
346
    GetBitContext *gb = &s->gb;
302
    int i, mode, ret;
303
304
346
    if (length > s->nb_samples)
305
        return AVERROR_INVALIDDATA;
306
307
346
    if (get_bits1(gb)) {
308
        int wlength, rval;
309
310
252
        wlength = length / s->uval;
311
312
252
        rval = length - (wlength * s->uval);
313
314
252
        if (rval < s->uval / 2)
315
210
            rval += s->uval;
316
        else
317
42
            wlength++;
318
319

252
        if (wlength <= 1 || wlength > 128)
320
            return AVERROR_INVALIDDATA;
321
322
252
        s->coding_mode[0] = mode = get_bits(gb, 6);
323
324
9051
        for (i = 1; i < wlength; i++) {
325
8799
            int c = get_unary(gb, 1, 6);
326
327

8799
            switch (c) {
328
            case 6:
329
                mode = get_bits(gb, 6);
330
                break;
331
238
            case 5:
332
            case 4:
333
            case 3: {
334
                /* mode += sign ? (1 - c) : (c - 1) */
335
238
                int sign = get_bits1(gb);
336
238
                mode    += (-sign ^ (c - 1)) + sign;
337
238
                break;
338
            }
339
1625
            case 2:
340
1625
                mode++;
341
1625
                break;
342
1761
            case 1:
343
1761
                mode--;
344
1761
                break;
345
            }
346
8799
            s->coding_mode[i] = mode;
347
        }
348
349
252
        i = 0;
350
4128
        while (i < wlength) {
351
3876
            int len = 0;
352
353
3876
            mode = s->coding_mode[i];
354
            do {
355
9051
                if (i >= wlength - 1)
356
252
                    len += rval;
357
                else
358
8799
                    len += s->uval;
359
9051
                i++;
360
361
9051
                if (i == wlength)
362
252
                    break;
363
8799
            } while (s->coding_mode[i] == mode);
364
365
3876
            if ((ret = decode_segment(s, mode, decoded, len)) < 0)
366
                return ret;
367
3876
            decoded += len;
368
        }
369
    } else {
370
94
        mode = get_bits(gb, 6);
371
94
        if ((ret = decode_segment(s, mode, decoded, length)) < 0)
372
            return ret;
373
    }
374
375
346
    return 0;
376
}
377
378
382
static int get_bits_esc4(GetBitContext *gb)
379
{
380
382
    if (get_bits1(gb))
381
25
        return get_bits(gb, 4) + 1;
382
    else
383
357
        return 0;
384
}
385
386
268
static int decode_subframe(TAKDecContext *s, int32_t *decoded,
387
                           int subframe_size, int prev_subframe_size)
388
{
389
268
    GetBitContext *gb = &s->gb;
390
268
    int x, y, i, j, ret = 0;
391
    int dshift, size, filter_quant, filter_order;
392
    int tfilter[MAX_PREDICTORS];
393
394
268
    if (!get_bits1(gb))
395
        return decode_residues(s, decoded, subframe_size);
396
397
268
    filter_order = predictor_sizes[get_bits(gb, 4)];
398
399

268
    if (prev_subframe_size > 0 && get_bits1(gb)) {
400
190
        if (filter_order > prev_subframe_size)
401
            return AVERROR_INVALIDDATA;
402
403
190
        decoded       -= filter_order;
404
190
        subframe_size += filter_order;
405
406
190
        if (filter_order > subframe_size)
407
            return AVERROR_INVALIDDATA;
408
    } else {
409
        int lpc_mode;
410
411
78
        if (filter_order > subframe_size)
412
            return AVERROR_INVALIDDATA;
413
414
78
        lpc_mode = get_bits(gb, 2);
415
78
        if (lpc_mode > 2)
416
            return AVERROR_INVALIDDATA;
417
418
78
        if ((ret = decode_residues(s, decoded, filter_order)) < 0)
419
            return ret;
420
421
78
        if (lpc_mode)
422
46
            decode_lpc(decoded, lpc_mode, filter_order);
423
    }
424
425
268
    dshift = get_bits_esc4(gb);
426
268
    size   = get_bits1(gb) + 6;
427
428
268
    filter_quant = 10;
429
268
    if (get_bits1(gb)) {
430
        filter_quant -= get_bits(gb, 3) + 1;
431
        if (filter_quant < 3)
432
            return AVERROR_INVALIDDATA;
433
    }
434
435
268
    s->predictors[0] = get_sbits(gb, 10);
436
268
    s->predictors[1] = get_sbits(gb, 10);
437
268
    s->predictors[2] = get_sbits(gb, size) * (1 << (10 - size));
438
268
    s->predictors[3] = get_sbits(gb, size) * (1 << (10 - size));
439
268
    if (filter_order > 4) {
440
245
        int tmp = size - get_bits1(gb);
441
442
9113
        for (i = 4; i < filter_order; i++) {
443
8868
            if (!(i & 3))
444
2217
                x = tmp - get_bits(gb, 2);
445
8868
            s->predictors[i] = get_sbits(gb, x) * (1 << (10 - size));
446
        }
447
    }
448
449
268
    tfilter[0] = s->predictors[0] * 64;
450
9940
    for (i = 1; i < filter_order; i++) {
451
9672
        uint32_t *p1 = &tfilter[0];
452
9672
        uint32_t *p2 = &tfilter[i - 1];
453
454
216180
        for (j = 0; j < (i + 1) / 2; j++) {
455
206508
            x     = *p1 + ((int32_t)(s->predictors[i] * *p2 + 256) >> 9);
456
206508
            *p2  += (int32_t)(s->predictors[i] * *p1 + 256) >> 9;
457
206508
            *p1++ = x;
458
206508
            p2--;
459
        }
460
461
9672
        tfilter[i] = s->predictors[i] * 64;
462
    }
463
464
268
    x = 1 << (32 - (15 - filter_quant));
465
268
    y = 1 << ((15 - filter_quant) - 1);
466
5238
    for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) {
467
4970
        s->filter[j] = x - ((tfilter[i] + y) >> (15 - filter_quant));
468
4970
        s->filter[i] = x - ((tfilter[j] + y) >> (15 - filter_quant));
469
    }
470
471
268
    if ((ret = decode_residues(s, &decoded[filter_order],
472
                               subframe_size - filter_order)) < 0)
473
        return ret;
474
475
10208
    for (i = 0; i < filter_order; i++)
476
9940
        s->residues[i] = *decoded++ >> dshift;
477
478
268
    y    = FF_ARRAY_ELEMS(s->residues) - filter_order;
479
268
    x    = subframe_size - filter_order;
480
2160
    while (x > 0) {
481
1892
        int tmp = FFMIN(y, x);
482
483
857832
        for (i = 0; i < tmp; i++) {
484
855940
            int v = 1 << (filter_quant - 1);
485
486
855940
            if (filter_order & -16)
487
703880
                v += (unsigned)s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
488
                                                 filter_order & -16);
489
1351472
            for (j = filter_order & -16; j < filter_order; j += 4) {
490
495532
                v += s->residues[i + j + 3] * (unsigned)s->filter[j + 3] +
491
495532
                     s->residues[i + j + 2] * (unsigned)s->filter[j + 2] +
492
495532
                     s->residues[i + j + 1] * (unsigned)s->filter[j + 1] +
493
495532
                     s->residues[i + j    ] * (unsigned)s->filter[j    ];
494
            }
495
855940
            v = (av_clip_intp2(v >> filter_quant, 13) * (1 << dshift)) - (unsigned)*decoded;
496
855940
            *decoded++ = v;
497
855940
            s->residues[filter_order + i] = v >> dshift;
498
        }
499
500
1892
        x -= tmp;
501
1892
        if (x > 0)
502
1624
            memcpy(s->residues, &s->residues[y], 2 * filter_order);
503
    }
504
505
268
    emms_c();
506
507
268
    return 0;
508
}
509
510
78
static int decode_channel(TAKDecContext *s, int chan)
511
{
512
78
    AVCodecContext *avctx = s->avctx;
513
78
    GetBitContext *gb     = &s->gb;
514
78
    int32_t *decoded      = s->decoded[chan];
515
78
    int left              = s->nb_samples - 1;
516
78
    int i = 0, ret, prev = 0;
517
518
78
    s->sample_shift[chan] = get_bits_esc4(gb);
519
78
    if (s->sample_shift[chan] >= avctx->bits_per_raw_sample)
520
        return AVERROR_INVALIDDATA;
521
522
78
    *decoded++ = get_sbits(gb, avctx->bits_per_raw_sample - s->sample_shift[chan]);
523
78
    s->lpc_mode[chan] = get_bits(gb, 2);
524
78
    s->nb_subframes   = get_bits(gb, 3) + 1;
525
526
78
    if (s->nb_subframes > 1) {
527
69
        if (get_bits_left(gb) < (s->nb_subframes - 1) * 6)
528
            return AVERROR_INVALIDDATA;
529
530
259
        for (; i < s->nb_subframes - 1; i++) {
531
190
            int v = get_bits(gb, 6);
532
533
190
            s->subframe_len[i] = (v - prev) * s->subframe_scale;
534
190
            if (s->subframe_len[i] <= 0)
535
                return AVERROR_INVALIDDATA;
536
537
190
            left -= s->subframe_len[i];
538
190
            prev  = v;
539
        }
540
541
69
        if (left <= 0)
542
            return AVERROR_INVALIDDATA;
543
    }
544
78
    s->subframe_len[i] = left;
545
546
78
    prev = 0;
547
346
    for (i = 0; i < s->nb_subframes; i++) {
548
268
        if ((ret = decode_subframe(s, decoded, s->subframe_len[i], prev)) < 0)
549
            return ret;
550
268
        decoded += s->subframe_len[i];
551
268
        prev     = s->subframe_len[i];
552
    }
553
554
78
    return 0;
555
}
556
557
39
static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
558
{
559
39
    GetBitContext *gb = &s->gb;
560
39
    int32_t *p1       = s->decoded[c1] + (s->dmode > 5);
561
39
    int32_t *p2       = s->decoded[c2] + (s->dmode > 5);
562
39
    int32_t bp1       = p1[0];
563
39
    int32_t bp2       = p2[0];
564
    int i;
565
    int dshift, dfactor;
566
567
39
    length += s->dmode < 6;
568
569


39
    switch (s->dmode) {
570
1
    case 1: /* left/side */
571
1
        s->tdsp.decorrelate_ls(p1, p2, length);
572
1
        break;
573
    case 2: /* side/right */
574
        s->tdsp.decorrelate_sr(p1, p2, length);
575
        break;
576
2
    case 3: /* side/mid */
577
2
        s->tdsp.decorrelate_sm(p1, p2, length);
578
2
        break;
579
4
    case 4: /* side/left with scale factor */
580
4
        FFSWAP(int32_t*, p1, p2);
581
4
        FFSWAP(int32_t, bp1, bp2);
582
6
    case 5: /* side/right with scale factor */
583
6
        dshift  = get_bits_esc4(gb);
584
6
        dfactor = get_sbits(gb, 10);
585
6
        s->tdsp.decorrelate_sf(p1, p2, length, dshift, dfactor);
586
6
        break;
587
13
    case 6:
588
13
        FFSWAP(int32_t*, p1, p2);
589
30
    case 7: {
590
        int length2, order_half, filter_order, dval1, dval2;
591
        int tmp, x, code_size;
592
593
30
        if (length < 256)
594
            return AVERROR_INVALIDDATA;
595
596
30
        dshift       = get_bits_esc4(gb);
597
30
        filter_order = 8 << get_bits1(gb);
598
30
        dval1        = get_bits1(gb);
599
30
        dval2        = get_bits1(gb);
600
601
366
        for (i = 0; i < filter_order; i++) {
602
336
            if (!(i & 3))
603
84
                code_size = 14 - get_bits(gb, 3);
604
336
            s->filter[i] = get_sbits(gb, code_size);
605
        }
606
607
30
        order_half = filter_order / 2;
608
30
        length2    = length - (filter_order - 1);
609
610
        /* decorrelate beginning samples */
611
30
        if (dval1) {
612
141
            for (i = 0; i < order_half; i++) {
613
120
                int32_t a = p1[i];
614
120
                int32_t b = p2[i];
615
120
                p1[i]     = a + b;
616
            }
617
        }
618
619
        /* decorrelate ending samples */
620
30
        if (dval2) {
621
96
            for (i = length2 + order_half; i < length; i++) {
622
78
                int32_t a = p1[i];
623
78
                int32_t b = p2[i];
624
78
                p1[i]     = a + b;
625
            }
626
        }
627
628
629
366
        for (i = 0; i < filter_order; i++)
630
336
            s->residues[i] = *p2++ >> dshift;
631
632
30
        p1 += order_half;
633
30
        x = FF_ARRAY_ELEMS(s->residues) - filter_order;
634
660
        for (; length2 > 0; length2 -= tmp) {
635
630
            tmp = FFMIN(length2, x);
636
637
331014
            for (i = 0; i < tmp - (tmp == length2); i++)
638
330384
                s->residues[filter_order + i] = *p2++ >> dshift;
639
640
331044
            for (i = 0; i < tmp; i++) {
641
330414
                int v = 1 << 9;
642
643
330414
                if (filter_order == 16) {
644
132108
                    v += s->adsp.scalarproduct_int16(&s->residues[i], s->filter,
645
                                                     filter_order);
646
                } else {
647
198306
                    v += s->residues[i + 7] * s->filter[7] +
648
198306
                         s->residues[i + 6] * s->filter[6] +
649
198306
                         s->residues[i + 5] * s->filter[5] +
650
198306
                         s->residues[i + 4] * s->filter[4] +
651
198306
                         s->residues[i + 3] * s->filter[3] +
652
198306
                         s->residues[i + 2] * s->filter[2] +
653
198306
                         s->residues[i + 1] * s->filter[1] +
654
198306
                         s->residues[i    ] * s->filter[0];
655
                }
656
657
330414
                v = av_clip_intp2(v >> 10, 13) * (1U << dshift) - *p1;
658
330414
                *p1++ = v;
659
            }
660
661
630
            memmove(s->residues, &s->residues[tmp], 2 * filter_order);
662
        }
663
664
30
        emms_c();
665
30
        break;
666
    }
667
    }
668
669

39
    if (s->dmode > 0 && s->dmode < 6) {
670
9
        p1[0] = bp1;
671
9
        p2[0] = bp2;
672
    }
673
674
39
    return 0;
675
}
676
677
39
static int tak_decode_frame(AVCodecContext *avctx, void *data,
678
                            int *got_frame_ptr, AVPacket *pkt)
679
{
680
39
    TAKDecContext *s  = avctx->priv_data;
681
39
    AVFrame *frame    = data;
682
39
    ThreadFrame tframe = { .f = data };
683
39
    GetBitContext *gb = &s->gb;
684
    int chan, i, ret, hsize;
685
686
39
    if (pkt->size < TAK_MIN_FRAME_HEADER_BYTES)
687
        return AVERROR_INVALIDDATA;
688
689
39
    if ((ret = init_get_bits8(gb, pkt->data, pkt->size)) < 0)
690
        return ret;
691
692
39
    if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0)
693
        return ret;
694
695
39
    hsize = get_bits_count(gb) / 8;
696
39
    if (avctx->err_recognition & (AV_EF_CRCCHECK|AV_EF_COMPLIANT)) {
697
        if (ff_tak_check_crc(pkt->data, hsize)) {
698
            av_log(avctx, AV_LOG_ERROR, "CRC error\n");
699
            if (avctx->err_recognition & AV_EF_EXPLODE)
700
                return AVERROR_INVALIDDATA;
701
        }
702
    }
703
704
39
    if (s->ti.codec != TAK_CODEC_MONO_STEREO &&
705
        s->ti.codec != TAK_CODEC_MULTICHANNEL) {
706
        avpriv_report_missing_feature(avctx, "TAK codec type %d", s->ti.codec);
707
        return AVERROR_PATCHWELCOME;
708
    }
709
39
    if (s->ti.data_type) {
710
        av_log(avctx, AV_LOG_ERROR,
711
               "unsupported data type: %d\n", s->ti.data_type);
712
        return AVERROR_INVALIDDATA;
713
    }
714

39
    if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) {
715
        av_log(avctx, AV_LOG_ERROR,
716
               "invalid number of channels: %d\n", s->ti.channels);
717
        return AVERROR_INVALIDDATA;
718
    }
719
39
    if (s->ti.channels > 6) {
720
        av_log(avctx, AV_LOG_ERROR,
721
               "unsupported number of channels: %d\n", s->ti.channels);
722
        return AVERROR_INVALIDDATA;
723
    }
724
725
39
    if (s->ti.frame_samples <= 0) {
726
        av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n");
727
        return AVERROR_INVALIDDATA;
728
    }
729
730
39
    avctx->bits_per_raw_sample = s->ti.bps;
731
39
    if ((ret = set_bps_params(avctx)) < 0)
732
        return ret;
733
39
    if (s->ti.sample_rate != avctx->sample_rate) {
734
        avctx->sample_rate = s->ti.sample_rate;
735
        set_sample_rate_params(avctx);
736
    }
737
39
    if (s->ti.ch_layout)
738
        avctx->channel_layout = s->ti.ch_layout;
739
39
    avctx->channels = s->ti.channels;
740
741
78
    s->nb_samples = s->ti.last_frame_samples ? s->ti.last_frame_samples
742
39
                                             : s->ti.frame_samples;
743
744
39
    frame->nb_samples = s->nb_samples;
745
39
    if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
746
        return ret;
747
39
    ff_thread_finish_setup(avctx);
748
749
39
    if (avctx->bits_per_raw_sample <= 16) {
750
39
        int buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
751
                                                  s->nb_samples,
752
                                                  AV_SAMPLE_FMT_S32P, 0);
753
39
        if (buf_size < 0)
754
            return buf_size;
755
39
        av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size);
756
39
        if (!s->decode_buffer)
757
            return AVERROR(ENOMEM);
758
39
        ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL,
759
39
                                     s->decode_buffer, avctx->channels,
760
                                     s->nb_samples, AV_SAMPLE_FMT_S32P, 0);
761
39
        if (ret < 0)
762
            return ret;
763
    } else {
764
        for (chan = 0; chan < avctx->channels; chan++)
765
            s->decoded[chan] = (int32_t *)frame->extended_data[chan];
766
    }
767
768
39
    if (s->nb_samples < 16) {
769
        for (chan = 0; chan < avctx->channels; chan++) {
770
            int32_t *decoded = s->decoded[chan];
771
            for (i = 0; i < s->nb_samples; i++)
772
                decoded[i] = get_sbits(gb, avctx->bits_per_raw_sample);
773
        }
774
    } else {
775
39
        if (s->ti.codec == TAK_CODEC_MONO_STEREO) {
776
117
            for (chan = 0; chan < avctx->channels; chan++)
777
78
                if (ret = decode_channel(s, chan))
778
                    return ret;
779
780
39
            if (avctx->channels == 2) {
781
39
                s->nb_subframes = get_bits(gb, 1) + 1;
782
39
                if (s->nb_subframes > 1) {
783
                    s->subframe_len[1] = get_bits(gb, 6);
784
                }
785
786
39
                s->dmode = get_bits(gb, 3);
787
39
                if (ret = decorrelate(s, 0, 1, s->nb_samples - 1))
788
                    return ret;
789
            }
790
        } else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) {
791
            if (get_bits1(gb)) {
792
                int ch_mask = 0;
793
794
                chan = get_bits(gb, 4) + 1;
795
                if (chan > avctx->channels)
796
                    return AVERROR_INVALIDDATA;
797
798
                for (i = 0; i < chan; i++) {
799
                    int nbit = get_bits(gb, 4);
800
801
                    if (nbit >= avctx->channels)
802
                        return AVERROR_INVALIDDATA;
803
804
                    if (ch_mask & 1 << nbit)
805
                        return AVERROR_INVALIDDATA;
806
807
                    s->mcdparams[i].present = get_bits1(gb);
808
                    if (s->mcdparams[i].present) {
809
                        s->mcdparams[i].index = get_bits(gb, 2);
810
                        s->mcdparams[i].chan2 = get_bits(gb, 4);
811
                        if (s->mcdparams[i].chan2 >= avctx->channels) {
812
                            av_log(avctx, AV_LOG_ERROR,
813
                                   "invalid channel 2 (%d) for %d channel(s)\n",
814
                                   s->mcdparams[i].chan2, avctx->channels);
815
                            return AVERROR_INVALIDDATA;
816
                        }
817
                        if (s->mcdparams[i].index == 1) {
818
                            if ((nbit == s->mcdparams[i].chan2) ||
819
                                (ch_mask & 1 << s->mcdparams[i].chan2))
820
                                return AVERROR_INVALIDDATA;
821
822
                            ch_mask |= 1 << s->mcdparams[i].chan2;
823
                        } else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) {
824
                            return AVERROR_INVALIDDATA;
825
                        }
826
                    }
827
                    s->mcdparams[i].chan1 = nbit;
828
829
                    ch_mask |= 1 << nbit;
830
                }
831
            } else {
832
                chan = avctx->channels;
833
                for (i = 0; i < chan; i++) {
834
                    s->mcdparams[i].present = 0;
835
                    s->mcdparams[i].chan1   = i;
836
                }
837
            }
838
839
            for (i = 0; i < chan; i++) {
840
                if (s->mcdparams[i].present && s->mcdparams[i].index == 1)
841
                    if (ret = decode_channel(s, s->mcdparams[i].chan2))
842
                        return ret;
843
844
                if (ret = decode_channel(s, s->mcdparams[i].chan1))
845
                    return ret;
846
847
                if (s->mcdparams[i].present) {
848
                    s->dmode = mc_dmodes[s->mcdparams[i].index];
849
                    if (ret = decorrelate(s,
850
                                          s->mcdparams[i].chan2,
851
                                          s->mcdparams[i].chan1,
852
                                          s->nb_samples - 1))
853
                        return ret;
854
                }
855
            }
856
        }
857
858
117
        for (chan = 0; chan < avctx->channels; chan++) {
859
78
            int32_t *decoded = s->decoded[chan];
860
861
78
            if (s->lpc_mode[chan])
862
78
                decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples);
863
864
78
            if (s->sample_shift[chan] > 0)
865
                for (i = 0; i < s->nb_samples; i++)
866
                    decoded[i] *= 1U << s->sample_shift[chan];
867
        }
868
    }
869
870
39
    align_get_bits(gb);
871
39
    skip_bits(gb, 24);
872
39
    if (get_bits_left(gb) < 0)
873
        av_log(avctx, AV_LOG_DEBUG, "overread\n");
874
39
    else if (get_bits_left(gb) > 0)
875
        av_log(avctx, AV_LOG_DEBUG, "underread\n");
876
877
39
    if (avctx->err_recognition & (AV_EF_CRCCHECK | AV_EF_COMPLIANT)) {
878
        if (ff_tak_check_crc(pkt->data + hsize,
879
                             get_bits_count(gb) / 8 - hsize)) {
880
            av_log(avctx, AV_LOG_ERROR, "CRC error\n");
881
            if (avctx->err_recognition & AV_EF_EXPLODE)
882
                return AVERROR_INVALIDDATA;
883
        }
884
    }
885
886
    /* convert to output buffer */
887

39
    switch (avctx->sample_fmt) {
888
    case AV_SAMPLE_FMT_U8P:
889
        for (chan = 0; chan < avctx->channels; chan++) {
890
            uint8_t *samples = (uint8_t *)frame->extended_data[chan];
891
            int32_t *decoded = s->decoded[chan];
892
            for (i = 0; i < s->nb_samples; i++)
893
                samples[i] = decoded[i] + 0x80U;
894
        }
895
        break;
896
39
    case AV_SAMPLE_FMT_S16P:
897
117
        for (chan = 0; chan < avctx->channels; chan++) {
898
78
            int16_t *samples = (int16_t *)frame->extended_data[chan];
899
78
            int32_t *decoded = s->decoded[chan];
900
860028
            for (i = 0; i < s->nb_samples; i++)
901
859950
                samples[i] = decoded[i];
902
        }
903
39
        break;
904
    case AV_SAMPLE_FMT_S32P:
905
        for (chan = 0; chan < avctx->channels; chan++) {
906
            int32_t *samples = (int32_t *)frame->extended_data[chan];
907
            for (i = 0; i < s->nb_samples; i++)
908
                samples[i] *= 1U << 8;
909
        }
910
        break;
911
    }
912
913
39
    *got_frame_ptr = 1;
914
915
39
    return pkt->size;
916
}
917
918
#if HAVE_THREADS
919
static int update_thread_context(AVCodecContext *dst,
920
                                 const AVCodecContext *src)
921
{
922
    TAKDecContext *tsrc = src->priv_data;
923
    TAKDecContext *tdst = dst->priv_data;
924
925
    if (dst == src)
926
        return 0;
927
    memcpy(&tdst->ti, &tsrc->ti, sizeof(TAKStreamInfo));
928
    return 0;
929
}
930
#endif
931
932
2
static av_cold int tak_decode_close(AVCodecContext *avctx)
933
{
934
2
    TAKDecContext *s = avctx->priv_data;
935
936
2
    av_freep(&s->decode_buffer);
937
938
2
    return 0;
939
}
940
941
AVCodec ff_tak_decoder = {
942
    .name             = "tak",
943
    .long_name        = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
944
    .type             = AVMEDIA_TYPE_AUDIO,
945
    .id               = AV_CODEC_ID_TAK,
946
    .priv_data_size   = sizeof(TAKDecContext),
947
    .init             = tak_decode_init,
948
    .close            = tak_decode_close,
949
    .decode           = tak_decode_frame,
950
    .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context),
951
    .capabilities     = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | AV_CODEC_CAP_CHANNEL_CONF,
952
    .sample_fmts      = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
953
                                                        AV_SAMPLE_FMT_S16P,
954
                                                        AV_SAMPLE_FMT_S32P,
955
                                                        AV_SAMPLE_FMT_NONE },
956
};