3
* Copyright (c) 2012 Paul B Mahol
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* This file is part of Libav.
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* Libav is free software; you can redistribute it and/or
8
* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* Libav is distributed in the hope that it will be useful,
13
* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15
* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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* TAK (Tom's lossless Audio Kompressor) decoder
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* @author Paul B Mahol
28
#include "libavutil/samplefmt.h"
35
#define MAX_SUBFRAMES 8 // max number of subframes per channel
36
#define MAX_PREDICTORS 256
38
typedef struct MCDParam {
39
int8_t present; // decorrelation parameter availability for this channel
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int8_t index; // index into array of decorrelation types
45
typedef struct TAKDecContext {
46
AVCodecContext *avctx; // parent AVCodecContext
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AVFrame frame; // AVFrame for decoded output
50
GetBitContext gb; // bitstream reader initialized to start at the current frame
53
int nb_samples; // number of samples in the current frame
54
uint8_t *decode_buffer;
55
unsigned int decode_buffer_size;
56
int32_t *decoded[TAK_MAX_CHANNELS]; // decoded samples for each channel
58
int8_t lpc_mode[TAK_MAX_CHANNELS];
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int8_t sample_shift[TAK_MAX_CHANNELS]; // shift applied to every sample in the channel
62
int8_t dmode; // channel decorrelation type in the current frame
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MCDParam mcdparams[TAK_MAX_CHANNELS]; // multichannel decorrelation parameters
67
unsigned int residues_buf_size;
70
static const int8_t mc_dmodes[] = { 1, 3, 4, 6, };
72
static const uint16_t predictor_sizes[] = {
73
4, 8, 12, 16, 24, 32, 48, 64, 80, 96, 128, 160, 192, 224, 256, 0,
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static const struct CParam {
83
{ 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 },
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{ 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 },
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{ 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D },
86
{ 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 },
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{ 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 },
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{ 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 },
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{ 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 },
90
{ 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 },
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{ 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 },
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{ 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 },
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{ 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 },
94
{ 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 },
95
{ 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 },
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{ 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 },
97
{ 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 },
98
{ 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 },
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{ 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 },
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{ 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 },
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{ 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 },
102
{ 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 },
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{ 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 },
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{ 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 },
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{ 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 },
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{ 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 },
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{ 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 },
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{ 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 },
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{ 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 },
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{ 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 },
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{ 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 },
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{ 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 },
113
{ 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 },
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{ 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 },
115
{ 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 },
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{ 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 },
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{ 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 },
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{ 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 },
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{ 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 },
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{ 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 },
121
{ 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 },
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{ 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 },
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{ 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 },
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{ 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 },
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{ 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 },
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{ 0x17, 0x0300000, 0x0300000, 0x0D00000, 0x1800000 },
127
{ 0x18, 0x0B00000, 0x0400000, 0x1C00000, 0x1900000 },
128
{ 0x18, 0x0600000, 0x0600000, 0x1A00000, 0x3000000 },
129
{ 0x19, 0x1600000, 0x0800000, 0x3800000, 0x3200000 },
130
{ 0x19, 0x0C00000, 0x0C00000, 0x3400000, 0x6000000 },
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{ 0x1A, 0x2C00000, 0x1000000, 0x7000000, 0x6400000 },
132
{ 0x1A, 0x1800000, 0x1800000, 0x6800000, 0xC000000 },
135
static av_cold void tak_init_static_data(AVCodec *codec)
140
static int set_bps_params(AVCodecContext *avctx)
142
switch (avctx->bits_per_coded_sample) {
144
avctx->sample_fmt = AV_SAMPLE_FMT_U8P;
147
avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
150
avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
153
av_log(avctx, AV_LOG_ERROR, "unsupported bits per sample: %d\n",
154
avctx->bits_per_coded_sample);
155
return AVERROR_INVALIDDATA;
157
avctx->bits_per_raw_sample = avctx->bits_per_coded_sample;
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static void set_sample_rate_params(AVCodecContext *avctx)
164
TAKDecContext *s = avctx->priv_data;
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int shift = 3 - (avctx->sample_rate / 11025);
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shift = FFMAX(0, shift);
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s->uval = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << shift;
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s->subframe_scale = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << 1;
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static av_cold int tak_decode_init(AVCodecContext *avctx)
173
TAKDecContext *s = avctx->priv_data;
175
ff_dsputil_init(&s->dsp, avctx);
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avcodec_get_frame_defaults(&s->frame);
179
avctx->coded_frame = &s->frame;
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set_sample_rate_params(avctx);
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return set_bps_params(avctx);
186
static void decode_lpc(int32_t *coeffs, int mode, int length)
195
for (i = 0; i < length - 1 >> 1; i++) {
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coeffs[1] += *coeffs;
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} else if (mode == 2) {
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int a2 = a1 + *coeffs;
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for (i = 0; i < length - 2 >> 1; i++) {
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int a3 = *coeffs + a1;
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} else if (mode == 3) {
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int a2 = a1 + *coeffs;
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for (i = 0; i < length - 3; i++) {
241
static int decode_segment(GetBitContext *gb, int mode, int32_t *decoded,
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memset(decoded, 0, len * sizeof(*decoded));
252
if (mode > FF_ARRAY_ELEMS(xcodes))
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return AVERROR_INVALIDDATA;
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code = xcodes[mode - 1];
256
for (i = 0; i < len; i++) {
257
int x = get_bits_long(gb, code.init);
258
if (x >= code.escape && get_bits1(gb)) {
260
if (x >= code.aescape) {
261
int scale = get_unary(gb, 1, 9);
263
int scale_bits = get_bits(gb, 3);
264
if (scale_bits > 0) {
265
if (scale_bits == 7) {
266
scale_bits += get_bits(gb, 5);
268
return AVERROR_INVALIDDATA;
270
scale = get_bits_long(gb, scale_bits) + 1;
271
x += code.scale * scale;
275
x += code.scale * scale - code.escape;
279
decoded[i] = (x >> 1) ^ -(x & 1);
285
static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
287
GetBitContext *gb = &s->gb;
290
if (length > s->nb_samples)
291
return AVERROR_INVALIDDATA;
295
int coding_mode[128];
297
wlength = length / s->uval;
299
rval = length - (wlength * s->uval);
301
if (rval < s->uval / 2)
306
if (wlength <= 1 || wlength > 128)
307
return AVERROR_INVALIDDATA;
309
coding_mode[0] = mode = get_bits(gb, 6);
311
for (i = 1; i < wlength; i++) {
312
int c = get_unary(gb, 1, 6);
316
mode = get_bits(gb, 6);
321
/* mode += sign ? (1 - c) : (c - 1) */
322
int sign = get_bits1(gb);
323
mode += (-sign ^ (c - 1)) + sign;
333
coding_mode[i] = mode;
337
while (i < wlength) {
340
mode = coding_mode[i];
342
if (i >= wlength - 1)
350
} while (coding_mode[i] == mode);
352
if ((ret = decode_segment(gb, mode, decoded, len)) < 0)
357
mode = get_bits(gb, 6);
358
if ((ret = decode_segment(gb, mode, decoded, length)) < 0)
365
static int get_bits_esc4(GetBitContext *gb)
368
return get_bits(gb, 4) + 1;
373
static void decode_filter_coeffs(TAKDecContext *s, int filter_order, int size,
374
int filter_quant, int16_t *filter)
376
GetBitContext *gb = &s->gb;
378
int filter_tmp[MAX_PREDICTORS];
379
int16_t predictors[MAX_PREDICTORS];
381
predictors[0] = get_sbits(gb, 10);
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predictors[1] = get_sbits(gb, 10);
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predictors[2] = get_sbits(gb, size) << (10 - size);
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predictors[3] = get_sbits(gb, size) << (10 - size);
385
if (filter_order > 4) {
386
int av_uninit(code_size);
387
int code_size_base = size - get_bits1(gb);
389
for (i = 4; i < filter_order; i++) {
391
code_size = code_size_base - get_bits(gb, 2);
392
predictors[i] = get_sbits(gb, code_size) << (10 - size);
396
filter_tmp[0] = predictors[0] << 6;
397
for (i = 1; i < filter_order; i++) {
398
int *p1 = &filter_tmp[0];
399
int *p2 = &filter_tmp[i - 1];
401
for (j = 0; j < (i + 1) / 2; j++) {
402
int tmp = *p1 + (predictors[i] * *p2 + 256 >> 9);
403
*p2 = *p2 + (predictors[i] * *p1 + 256 >> 9);
409
filter_tmp[i] = predictors[i] << 6;
412
a = 1 << (32 - (15 - filter_quant));
413
b = 1 << ((15 - filter_quant) - 1);
414
for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) {
415
filter[j] = a - ((filter_tmp[i] + b) >> (15 - filter_quant));
416
filter[i] = a - ((filter_tmp[j] + b) >> (15 - filter_quant));
420
static int decode_subframe(TAKDecContext *s, int32_t *decoded,
421
int subframe_size, int prev_subframe_size)
423
LOCAL_ALIGNED_16(int16_t, filter, [MAX_PREDICTORS]);
424
GetBitContext *gb = &s->gb;
426
int dshift, size, filter_quant, filter_order;
428
memset(filter, 0, MAX_PREDICTORS * sizeof(*filter));
431
return decode_residues(s, decoded, subframe_size);
433
filter_order = predictor_sizes[get_bits(gb, 4)];
435
if (prev_subframe_size > 0 && get_bits1(gb)) {
436
if (filter_order > prev_subframe_size)
437
return AVERROR_INVALIDDATA;
439
decoded -= filter_order;
440
subframe_size += filter_order;
442
if (filter_order > subframe_size)
443
return AVERROR_INVALIDDATA;
447
if (filter_order > subframe_size)
448
return AVERROR_INVALIDDATA;
450
lpc_mode = get_bits(gb, 2);
452
return AVERROR_INVALIDDATA;
454
if ((ret = decode_residues(s, decoded, filter_order)) < 0)
458
decode_lpc(decoded, lpc_mode, filter_order);
461
dshift = get_bits_esc4(gb);
462
size = get_bits1(gb) + 6;
466
filter_quant -= get_bits(gb, 3) + 1;
467
if (filter_quant < 3)
468
return AVERROR_INVALIDDATA;
471
decode_filter_coeffs(s, filter_order, size, filter_quant, filter);
473
if ((ret = decode_residues(s, &decoded[filter_order],
474
subframe_size - filter_order)) < 0)
477
av_fast_malloc(&s->residues, &s->residues_buf_size,
478
FFALIGN(subframe_size + 16, 16) * sizeof(*s->residues));
480
return AVERROR(ENOMEM);
481
memset(s->residues, 0, s->residues_buf_size);
483
for (i = 0; i < filter_order; i++)
484
s->residues[i] = *decoded++ >> dshift;
486
for (i = 0; i < subframe_size - filter_order; i++) {
487
int v = 1 << (filter_quant - 1);
489
v += s->dsp.scalarproduct_int16(&s->residues[i], filter,
490
FFALIGN(filter_order, 16));
492
v = (av_clip(v >> filter_quant, -8192, 8191) << dshift) - *decoded;
494
s->residues[filter_order + i] = v >> dshift;
502
static int decode_channel(TAKDecContext *s, int chan)
504
AVCodecContext *avctx = s->avctx;
505
GetBitContext *gb = &s->gb;
506
int32_t *decoded = s->decoded[chan];
507
int left = s->nb_samples - 1;
508
int i, prev, ret, nb_subframes;
509
int subframe_len[MAX_SUBFRAMES];
511
s->sample_shift[chan] = get_bits_esc4(gb);
512
if (s->sample_shift[chan] >= avctx->bits_per_coded_sample)
513
return AVERROR_INVALIDDATA;
515
/* NOTE: TAK 2.2.0 appears to set the sample value to 0 if
516
* bits_per_coded_sample - sample_shift is 1, but this produces
517
* non-bit-exact output. Reading the 1 bit using get_sbits() instead
518
* of skipping it produces bit-exact output. This has been reported
519
* to the TAK author. */
520
*decoded++ = get_sbits(gb,
521
avctx->bits_per_coded_sample -
522
s->sample_shift[chan]);
523
s->lpc_mode[chan] = get_bits(gb, 2);
524
nb_subframes = get_bits(gb, 3) + 1;
527
if (nb_subframes > 1) {
528
if (get_bits_left(gb) < (nb_subframes - 1) * 6)
529
return AVERROR_INVALIDDATA;
532
for (; i < nb_subframes - 1; i++) {
533
int subframe_end = get_bits(gb, 6) * s->subframe_scale;
534
if (subframe_end <= prev)
535
return AVERROR_INVALIDDATA;
536
subframe_len[i] = subframe_end - prev;
537
left -= subframe_len[i];
542
return AVERROR_INVALIDDATA;
544
subframe_len[i] = left;
547
for (i = 0; i < nb_subframes; i++) {
548
if ((ret = decode_subframe(s, decoded, subframe_len[i], prev)) < 0)
550
decoded += subframe_len[i];
551
prev = subframe_len[i];
557
static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
559
GetBitContext *gb = &s->gb;
560
int32_t *p1 = s->decoded[c1] + 1;
561
int32_t *p2 = s->decoded[c2] + 1;
566
case 1: /* left/side */
567
for (i = 0; i < length; i++) {
573
case 2: /* side/right */
574
for (i = 0; i < length; i++) {
580
case 3: /* side/mid */
581
for (i = 0; i < length; i++) {
589
case 4: /* side/left with scale factor */
590
FFSWAP(int32_t*, p1, p2);
591
case 5: /* side/right with scale factor */
592
dshift = get_bits_esc4(gb);
593
dfactor = get_sbits(gb, 10);
594
for (i = 0; i < length; i++) {
597
b = dfactor * (b >> dshift) + 128 >> 8 << dshift;
602
FFSWAP(int32_t*, p1, p2);
604
LOCAL_ALIGNED_16(int16_t, filter, [MAX_PREDICTORS]);
605
int length2, order_half, filter_order, dval1, dval2;
606
int av_uninit(code_size);
608
memset(filter, 0, MAX_PREDICTORS * sizeof(*filter));
611
return AVERROR_INVALIDDATA;
613
dshift = get_bits_esc4(gb);
614
filter_order = 8 << get_bits1(gb);
615
dval1 = get_bits1(gb);
616
dval2 = get_bits1(gb);
618
for (i = 0; i < filter_order; i++) {
620
code_size = 14 - get_bits(gb, 3);
621
filter[i] = get_sbits(gb, code_size);
624
order_half = filter_order / 2;
625
length2 = length - (filter_order - 1);
627
/* decorrelate beginning samples */
629
for (i = 0; i < order_half; i++) {
636
/* decorrelate ending samples */
638
for (i = length2 + order_half; i < length; i++) {
645
av_fast_malloc(&s->residues, &s->residues_buf_size,
646
FFALIGN(length + 16, 16) * sizeof(*s->residues));
648
return AVERROR(ENOMEM);
649
memset(s->residues, 0, s->residues_buf_size);
651
for (i = 0; i < length; i++)
652
s->residues[i] = p2[i] >> dshift;
656
for (i = 0; i < length2; i++) {
659
v += s->dsp.scalarproduct_int16(&s->residues[i], filter,
660
FFALIGN(filter_order, 16));
662
p1[i] = (av_clip(v >> 10, -8192, 8191) << dshift) - p1[i];
673
static int tak_decode_frame(AVCodecContext *avctx, void *data,
674
int *got_frame_ptr, AVPacket *pkt)
676
TAKDecContext *s = avctx->priv_data;
677
GetBitContext *gb = &s->gb;
678
int chan, i, ret, hsize;
680
if (pkt->size < TAK_MIN_FRAME_HEADER_BYTES)
681
return AVERROR_INVALIDDATA;
683
init_get_bits(gb, pkt->data, pkt->size * 8);
685
if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0)
688
if (s->ti.flags & TAK_FRAME_FLAG_HAS_METADATA) {
689
av_log_missing_feature(avctx, "frame metadata", 1);
690
return AVERROR_PATCHWELCOME;
693
hsize = get_bits_count(gb) / 8;
694
if (avctx->err_recognition & AV_EF_CRCCHECK) {
695
if (ff_tak_check_crc(pkt->data, hsize)) {
696
av_log(avctx, AV_LOG_ERROR, "CRC error\n");
697
return AVERROR_INVALIDDATA;
701
if (s->ti.codec != TAK_CODEC_MONO_STEREO &&
702
s->ti.codec != TAK_CODEC_MULTICHANNEL) {
703
av_log(avctx, AV_LOG_ERROR, "unsupported codec: %d\n", s->ti.codec);
704
return AVERROR_PATCHWELCOME;
706
if (s->ti.data_type) {
707
av_log(avctx, AV_LOG_ERROR,
708
"unsupported data type: %d\n", s->ti.data_type);
709
return AVERROR_INVALIDDATA;
711
if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) {
712
av_log(avctx, AV_LOG_ERROR,
713
"invalid number of channels: %d\n", s->ti.channels);
714
return AVERROR_INVALIDDATA;
716
if (s->ti.channels > 6) {
717
av_log(avctx, AV_LOG_ERROR,
718
"unsupported number of channels: %d\n", s->ti.channels);
719
return AVERROR_INVALIDDATA;
722
if (s->ti.frame_samples <= 0) {
723
av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n");
724
return AVERROR_INVALIDDATA;
727
if (s->ti.bps != avctx->bits_per_coded_sample) {
728
avctx->bits_per_coded_sample = s->ti.bps;
729
if ((ret = set_bps_params(avctx)) < 0)
732
if (s->ti.sample_rate != avctx->sample_rate) {
733
avctx->sample_rate = s->ti.sample_rate;
734
set_sample_rate_params(avctx);
737
avctx->channel_layout = s->ti.ch_layout;
738
avctx->channels = s->ti.channels;
740
s->nb_samples = s->ti.last_frame_samples ? s->ti.last_frame_samples
741
: s->ti.frame_samples;
743
s->frame.nb_samples = s->nb_samples;
744
if ((ret = ff_get_buffer(avctx, &s->frame)) < 0)
747
if (avctx->bits_per_coded_sample <= 16) {
748
int buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
750
AV_SAMPLE_FMT_S32P, 0);
751
av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size);
752
if (!s->decode_buffer)
753
return AVERROR(ENOMEM);
754
ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL,
755
s->decode_buffer, avctx->channels,
756
s->nb_samples, AV_SAMPLE_FMT_S32P, 0);
760
for (chan = 0; chan < avctx->channels; chan++)
761
s->decoded[chan] = (int32_t *)s->frame.extended_data[chan];
764
if (s->nb_samples < 16) {
765
for (chan = 0; chan < avctx->channels; chan++) {
766
int32_t *decoded = s->decoded[chan];
767
for (i = 0; i < s->nb_samples; i++)
768
decoded[i] = get_sbits(gb, avctx->bits_per_coded_sample);
771
if (s->ti.codec == TAK_CODEC_MONO_STEREO) {
772
for (chan = 0; chan < avctx->channels; chan++)
773
if (ret = decode_channel(s, chan))
776
if (avctx->channels == 2) {
778
// some kind of subframe length, but it seems to be unused
782
s->dmode = get_bits(gb, 3);
783
if (ret = decorrelate(s, 0, 1, s->nb_samples - 1))
786
} else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) {
790
chan = get_bits(gb, 4) + 1;
791
if (chan > avctx->channels)
792
return AVERROR_INVALIDDATA;
794
for (i = 0; i < chan; i++) {
795
int nbit = get_bits(gb, 4);
797
if (nbit >= avctx->channels)
798
return AVERROR_INVALIDDATA;
800
if (ch_mask & 1 << nbit)
801
return AVERROR_INVALIDDATA;
803
s->mcdparams[i].present = get_bits1(gb);
804
if (s->mcdparams[i].present) {
805
s->mcdparams[i].index = get_bits(gb, 2);
806
s->mcdparams[i].chan2 = get_bits(gb, 4);
807
if (s->mcdparams[i].index == 1) {
808
if ((nbit == s->mcdparams[i].chan2) ||
809
(ch_mask & 1 << s->mcdparams[i].chan2))
810
return AVERROR_INVALIDDATA;
812
ch_mask |= 1 << s->mcdparams[i].chan2;
813
} else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) {
814
return AVERROR_INVALIDDATA;
817
s->mcdparams[i].chan1 = nbit;
819
ch_mask |= 1 << nbit;
822
chan = avctx->channels;
823
for (i = 0; i < chan; i++) {
824
s->mcdparams[i].present = 0;
825
s->mcdparams[i].chan1 = i;
829
for (i = 0; i < chan; i++) {
830
if (s->mcdparams[i].present && s->mcdparams[i].index == 1)
831
if (ret = decode_channel(s, s->mcdparams[i].chan2))
834
if (ret = decode_channel(s, s->mcdparams[i].chan1))
837
if (s->mcdparams[i].present) {
838
s->dmode = mc_dmodes[s->mcdparams[i].index];
839
if (ret = decorrelate(s,
840
s->mcdparams[i].chan2,
841
s->mcdparams[i].chan1,
848
for (chan = 0; chan < avctx->channels; chan++) {
849
int32_t *decoded = s->decoded[chan];
851
if (s->lpc_mode[chan])
852
decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples);
854
if (s->sample_shift[chan] > 0)
855
for (i = 0; i < s->nb_samples; i++)
856
decoded[i] <<= s->sample_shift[chan];
862
if (get_bits_left(gb) < 0)
863
av_log(avctx, AV_LOG_DEBUG, "overread\n");
864
else if (get_bits_left(gb) > 0)
865
av_log(avctx, AV_LOG_DEBUG, "underread\n");
867
if (avctx->err_recognition & AV_EF_CRCCHECK) {
868
if (ff_tak_check_crc(pkt->data + hsize,
869
get_bits_count(gb) / 8 - hsize)) {
870
av_log(avctx, AV_LOG_ERROR, "CRC error\n");
871
return AVERROR_INVALIDDATA;
875
/* convert to output buffer */
876
switch (avctx->sample_fmt) {
877
case AV_SAMPLE_FMT_U8P:
878
for (chan = 0; chan < avctx->channels; chan++) {
879
uint8_t *samples = (uint8_t *)s->frame.extended_data[chan];
880
int32_t *decoded = s->decoded[chan];
881
for (i = 0; i < s->nb_samples; i++)
882
samples[i] = decoded[i] + 0x80;
885
case AV_SAMPLE_FMT_S16P:
886
for (chan = 0; chan < avctx->channels; chan++) {
887
int16_t *samples = (int16_t *)s->frame.extended_data[chan];
888
int32_t *decoded = s->decoded[chan];
889
for (i = 0; i < s->nb_samples; i++)
890
samples[i] = decoded[i];
893
case AV_SAMPLE_FMT_S32P:
894
for (chan = 0; chan < avctx->channels; chan++) {
895
int32_t *samples = (int32_t *)s->frame.extended_data[chan];
896
for (i = 0; i < s->nb_samples; i++)
903
*(AVFrame *)data = s->frame;
908
static av_cold int tak_decode_close(AVCodecContext *avctx)
910
TAKDecContext *s = avctx->priv_data;
912
av_freep(&s->decode_buffer);
913
av_freep(&s->residues);
918
AVCodec ff_tak_decoder = {
920
.type = AVMEDIA_TYPE_AUDIO,
921
.id = AV_CODEC_ID_TAK,
922
.priv_data_size = sizeof(TAKDecContext),
923
.init = tak_decode_init,
924
.init_static_data = tak_init_static_data,
925
.close = tak_decode_close,
926
.decode = tak_decode_frame,
927
.capabilities = CODEC_CAP_DR1,
928
.long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
929
.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
932
AV_SAMPLE_FMT_NONE },