3 * Copyright (c) 2012 Paul B Mahol
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * TAK (Tom's lossless Audio Kompressor) decoder
25 * @author Paul B Mahol
28 #include "libavutil/internal.h"
29 #include "libavutil/samplefmt.h"
36 #define MAX_SUBFRAMES 8 // max number of subframes per channel
37 #define MAX_PREDICTORS 256
39 typedef struct MCDParam {
40 int8_t present; // decorrelation parameter availability for this channel
41 int8_t index; // index into array of decorrelation types
46 typedef struct TAKDecContext {
47 AVCodecContext *avctx; // parent AVCodecContext
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];
59 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
64 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,
76 static const struct CParam {
83 { 0x01, 0x0000001, 0x0000001, 0x0000003, 0x0000008 },
84 { 0x02, 0x0000003, 0x0000001, 0x0000007, 0x0000006 },
85 { 0x03, 0x0000005, 0x0000002, 0x000000E, 0x000000D },
86 { 0x03, 0x0000003, 0x0000003, 0x000000D, 0x0000018 },
87 { 0x04, 0x000000B, 0x0000004, 0x000001C, 0x0000019 },
88 { 0x04, 0x0000006, 0x0000006, 0x000001A, 0x0000030 },
89 { 0x05, 0x0000016, 0x0000008, 0x0000038, 0x0000032 },
90 { 0x05, 0x000000C, 0x000000C, 0x0000034, 0x0000060 },
91 { 0x06, 0x000002C, 0x0000010, 0x0000070, 0x0000064 },
92 { 0x06, 0x0000018, 0x0000018, 0x0000068, 0x00000C0 },
93 { 0x07, 0x0000058, 0x0000020, 0x00000E0, 0x00000C8 },
94 { 0x07, 0x0000030, 0x0000030, 0x00000D0, 0x0000180 },
95 { 0x08, 0x00000B0, 0x0000040, 0x00001C0, 0x0000190 },
96 { 0x08, 0x0000060, 0x0000060, 0x00001A0, 0x0000300 },
97 { 0x09, 0x0000160, 0x0000080, 0x0000380, 0x0000320 },
98 { 0x09, 0x00000C0, 0x00000C0, 0x0000340, 0x0000600 },
99 { 0x0A, 0x00002C0, 0x0000100, 0x0000700, 0x0000640 },
100 { 0x0A, 0x0000180, 0x0000180, 0x0000680, 0x0000C00 },
101 { 0x0B, 0x0000580, 0x0000200, 0x0000E00, 0x0000C80 },
102 { 0x0B, 0x0000300, 0x0000300, 0x0000D00, 0x0001800 },
103 { 0x0C, 0x0000B00, 0x0000400, 0x0001C00, 0x0001900 },
104 { 0x0C, 0x0000600, 0x0000600, 0x0001A00, 0x0003000 },
105 { 0x0D, 0x0001600, 0x0000800, 0x0003800, 0x0003200 },
106 { 0x0D, 0x0000C00, 0x0000C00, 0x0003400, 0x0006000 },
107 { 0x0E, 0x0002C00, 0x0001000, 0x0007000, 0x0006400 },
108 { 0x0E, 0x0001800, 0x0001800, 0x0006800, 0x000C000 },
109 { 0x0F, 0x0005800, 0x0002000, 0x000E000, 0x000C800 },
110 { 0x0F, 0x0003000, 0x0003000, 0x000D000, 0x0018000 },
111 { 0x10, 0x000B000, 0x0004000, 0x001C000, 0x0019000 },
112 { 0x10, 0x0006000, 0x0006000, 0x001A000, 0x0030000 },
113 { 0x11, 0x0016000, 0x0008000, 0x0038000, 0x0032000 },
114 { 0x11, 0x000C000, 0x000C000, 0x0034000, 0x0060000 },
115 { 0x12, 0x002C000, 0x0010000, 0x0070000, 0x0064000 },
116 { 0x12, 0x0018000, 0x0018000, 0x0068000, 0x00C0000 },
117 { 0x13, 0x0058000, 0x0020000, 0x00E0000, 0x00C8000 },
118 { 0x13, 0x0030000, 0x0030000, 0x00D0000, 0x0180000 },
119 { 0x14, 0x00B0000, 0x0040000, 0x01C0000, 0x0190000 },
120 { 0x14, 0x0060000, 0x0060000, 0x01A0000, 0x0300000 },
121 { 0x15, 0x0160000, 0x0080000, 0x0380000, 0x0320000 },
122 { 0x15, 0x00C0000, 0x00C0000, 0x0340000, 0x0600000 },
123 { 0x16, 0x02C0000, 0x0100000, 0x0700000, 0x0640000 },
124 { 0x16, 0x0180000, 0x0180000, 0x0680000, 0x0C00000 },
125 { 0x17, 0x0580000, 0x0200000, 0x0E00000, 0x0C80000 },
126 { 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 },
131 { 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;
162 static void set_sample_rate_params(AVCodecContext *avctx)
164 TAKDecContext *s = avctx->priv_data;
165 int shift = 3 - (avctx->sample_rate / 11025);
166 shift = FFMAX(0, shift);
167 s->uval = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << shift;
168 s->subframe_scale = FFALIGN(avctx->sample_rate + 511 >> 9, 4) << 1;
171 static av_cold int tak_decode_init(AVCodecContext *avctx)
173 TAKDecContext *s = avctx->priv_data;
175 ff_dsputil_init(&s->dsp, avctx);
179 set_sample_rate_params(avctx);
181 return set_bps_params(avctx);
184 static void decode_lpc(int32_t *coeffs, int mode, int length)
193 for (i = 0; i < length - 1 >> 1; i++) {
195 coeffs[1] += *coeffs;
201 } else if (mode == 2) {
203 int a2 = a1 + *coeffs;
207 for (i = 0; i < length - 2 >> 1; i++) {
208 int a3 = *coeffs + a1;
219 } else if (mode == 3) {
221 int a2 = a1 + *coeffs;
228 for (i = 0; i < length - 3; i++) {
239 static int decode_segment(GetBitContext *gb, int mode, int32_t *decoded,
246 memset(decoded, 0, len * sizeof(*decoded));
250 if (mode > FF_ARRAY_ELEMS(xcodes))
251 return AVERROR_INVALIDDATA;
252 code = xcodes[mode - 1];
254 for (i = 0; i < len; i++) {
255 int x = get_bits_long(gb, code.init);
256 if (x >= code.escape && get_bits1(gb)) {
258 if (x >= code.aescape) {
259 int scale = get_unary(gb, 1, 9);
261 int scale_bits = get_bits(gb, 3);
262 if (scale_bits > 0) {
263 if (scale_bits == 7) {
264 scale_bits += get_bits(gb, 5);
266 return AVERROR_INVALIDDATA;
268 scale = get_bits_long(gb, scale_bits) + 1;
269 x += code.scale * scale;
273 x += code.scale * scale - code.escape;
277 decoded[i] = (x >> 1) ^ -(x & 1);
283 static int decode_residues(TAKDecContext *s, int32_t *decoded, int length)
285 GetBitContext *gb = &s->gb;
288 if (length > s->nb_samples)
289 return AVERROR_INVALIDDATA;
293 int coding_mode[128];
295 wlength = length / s->uval;
297 rval = length - (wlength * s->uval);
299 if (rval < s->uval / 2)
304 if (wlength <= 1 || wlength > 128)
305 return AVERROR_INVALIDDATA;
307 coding_mode[0] = mode = get_bits(gb, 6);
309 for (i = 1; i < wlength; i++) {
310 int c = get_unary(gb, 1, 6);
314 mode = get_bits(gb, 6);
319 /* mode += sign ? (1 - c) : (c - 1) */
320 int sign = get_bits1(gb);
321 mode += (-sign ^ (c - 1)) + sign;
331 coding_mode[i] = mode;
335 while (i < wlength) {
338 mode = coding_mode[i];
340 if (i >= wlength - 1)
348 } while (coding_mode[i] == mode);
350 if ((ret = decode_segment(gb, mode, decoded, len)) < 0)
355 mode = get_bits(gb, 6);
356 if ((ret = decode_segment(gb, mode, decoded, length)) < 0)
363 static int get_bits_esc4(GetBitContext *gb)
366 return get_bits(gb, 4) + 1;
371 static void decode_filter_coeffs(TAKDecContext *s, int filter_order, int size,
372 int filter_quant, int16_t *filter)
374 GetBitContext *gb = &s->gb;
376 int filter_tmp[MAX_PREDICTORS];
377 int16_t predictors[MAX_PREDICTORS];
379 predictors[0] = get_sbits(gb, 10);
380 predictors[1] = get_sbits(gb, 10);
381 predictors[2] = get_sbits(gb, size) << (10 - size);
382 predictors[3] = get_sbits(gb, size) << (10 - size);
383 if (filter_order > 4) {
384 int av_uninit(code_size);
385 int code_size_base = size - get_bits1(gb);
387 for (i = 4; i < filter_order; i++) {
389 code_size = code_size_base - get_bits(gb, 2);
390 predictors[i] = get_sbits(gb, code_size) << (10 - size);
394 filter_tmp[0] = predictors[0] << 6;
395 for (i = 1; i < filter_order; i++) {
396 int *p1 = &filter_tmp[0];
397 int *p2 = &filter_tmp[i - 1];
399 for (j = 0; j < (i + 1) / 2; j++) {
400 int tmp = *p1 + (predictors[i] * *p2 + 256 >> 9);
401 *p2 = *p2 + (predictors[i] * *p1 + 256 >> 9);
407 filter_tmp[i] = predictors[i] << 6;
410 a = 1 << (32 - (15 - filter_quant));
411 b = 1 << ((15 - filter_quant) - 1);
412 for (i = 0, j = filter_order - 1; i < filter_order / 2; i++, j--) {
413 filter[j] = a - ((filter_tmp[i] + b) >> (15 - filter_quant));
414 filter[i] = a - ((filter_tmp[j] + b) >> (15 - filter_quant));
418 static int decode_subframe(TAKDecContext *s, int32_t *decoded,
419 int subframe_size, int prev_subframe_size)
421 LOCAL_ALIGNED_16(int16_t, filter, [MAX_PREDICTORS]);
422 GetBitContext *gb = &s->gb;
424 int dshift, size, filter_quant, filter_order;
426 memset(filter, 0, MAX_PREDICTORS * sizeof(*filter));
429 return decode_residues(s, decoded, subframe_size);
431 filter_order = predictor_sizes[get_bits(gb, 4)];
433 if (prev_subframe_size > 0 && get_bits1(gb)) {
434 if (filter_order > prev_subframe_size)
435 return AVERROR_INVALIDDATA;
437 decoded -= filter_order;
438 subframe_size += filter_order;
440 if (filter_order > subframe_size)
441 return AVERROR_INVALIDDATA;
445 if (filter_order > subframe_size)
446 return AVERROR_INVALIDDATA;
448 lpc_mode = get_bits(gb, 2);
450 return AVERROR_INVALIDDATA;
452 if ((ret = decode_residues(s, decoded, filter_order)) < 0)
456 decode_lpc(decoded, lpc_mode, filter_order);
459 dshift = get_bits_esc4(gb);
460 size = get_bits1(gb) + 6;
464 filter_quant -= get_bits(gb, 3) + 1;
465 if (filter_quant < 3)
466 return AVERROR_INVALIDDATA;
469 decode_filter_coeffs(s, filter_order, size, filter_quant, filter);
471 if ((ret = decode_residues(s, &decoded[filter_order],
472 subframe_size - filter_order)) < 0)
475 av_fast_malloc(&s->residues, &s->residues_buf_size,
476 FFALIGN(subframe_size + 16, 16) * sizeof(*s->residues));
478 return AVERROR(ENOMEM);
479 memset(s->residues, 0, s->residues_buf_size);
481 for (i = 0; i < filter_order; i++)
482 s->residues[i] = *decoded++ >> dshift;
484 for (i = 0; i < subframe_size - filter_order; i++) {
485 int v = 1 << (filter_quant - 1);
487 v += s->dsp.scalarproduct_int16(&s->residues[i], filter,
488 FFALIGN(filter_order, 16));
490 v = (av_clip(v >> filter_quant, -8192, 8191) << dshift) - *decoded;
492 s->residues[filter_order + i] = v >> dshift;
500 static int decode_channel(TAKDecContext *s, int chan)
502 AVCodecContext *avctx = s->avctx;
503 GetBitContext *gb = &s->gb;
504 int32_t *decoded = s->decoded[chan];
505 int left = s->nb_samples - 1;
506 int i, prev, ret, nb_subframes;
507 int subframe_len[MAX_SUBFRAMES];
509 s->sample_shift[chan] = get_bits_esc4(gb);
510 if (s->sample_shift[chan] >= avctx->bits_per_coded_sample)
511 return AVERROR_INVALIDDATA;
513 /* NOTE: TAK 2.2.0 appears to set the sample value to 0 if
514 * bits_per_coded_sample - sample_shift is 1, but this produces
515 * non-bit-exact output. Reading the 1 bit using get_sbits() instead
516 * of skipping it produces bit-exact output. This has been reported
517 * to the TAK author. */
518 *decoded++ = get_sbits(gb,
519 avctx->bits_per_coded_sample -
520 s->sample_shift[chan]);
521 s->lpc_mode[chan] = get_bits(gb, 2);
522 nb_subframes = get_bits(gb, 3) + 1;
525 if (nb_subframes > 1) {
526 if (get_bits_left(gb) < (nb_subframes - 1) * 6)
527 return AVERROR_INVALIDDATA;
530 for (; i < nb_subframes - 1; i++) {
531 int subframe_end = get_bits(gb, 6) * s->subframe_scale;
532 if (subframe_end <= prev)
533 return AVERROR_INVALIDDATA;
534 subframe_len[i] = subframe_end - prev;
535 left -= subframe_len[i];
540 return AVERROR_INVALIDDATA;
542 subframe_len[i] = left;
545 for (i = 0; i < nb_subframes; i++) {
546 if ((ret = decode_subframe(s, decoded, subframe_len[i], prev)) < 0)
548 decoded += subframe_len[i];
549 prev = subframe_len[i];
555 static int decorrelate(TAKDecContext *s, int c1, int c2, int length)
557 GetBitContext *gb = &s->gb;
558 int32_t *p1 = s->decoded[c1] + 1;
559 int32_t *p2 = s->decoded[c2] + 1;
564 case 1: /* left/side */
565 for (i = 0; i < length; i++) {
571 case 2: /* side/right */
572 for (i = 0; i < length; i++) {
578 case 3: /* side/mid */
579 for (i = 0; i < length; i++) {
587 case 4: /* side/left with scale factor */
588 FFSWAP(int32_t*, p1, p2);
589 case 5: /* side/right with scale factor */
590 dshift = get_bits_esc4(gb);
591 dfactor = get_sbits(gb, 10);
592 for (i = 0; i < length; i++) {
595 b = dfactor * (b >> dshift) + 128 >> 8 << dshift;
600 FFSWAP(int32_t*, p1, p2);
602 LOCAL_ALIGNED_16(int16_t, filter, [MAX_PREDICTORS]);
603 int length2, order_half, filter_order, dval1, dval2;
604 int av_uninit(code_size);
606 memset(filter, 0, MAX_PREDICTORS * sizeof(*filter));
609 return AVERROR_INVALIDDATA;
611 dshift = get_bits_esc4(gb);
612 filter_order = 8 << get_bits1(gb);
613 dval1 = get_bits1(gb);
614 dval2 = get_bits1(gb);
616 for (i = 0; i < filter_order; i++) {
618 code_size = 14 - get_bits(gb, 3);
619 filter[i] = get_sbits(gb, code_size);
622 order_half = filter_order / 2;
623 length2 = length - (filter_order - 1);
625 /* decorrelate beginning samples */
627 for (i = 0; i < order_half; i++) {
634 /* decorrelate ending samples */
636 for (i = length2 + order_half; i < length; i++) {
643 av_fast_malloc(&s->residues, &s->residues_buf_size,
644 FFALIGN(length + 16, 16) * sizeof(*s->residues));
646 return AVERROR(ENOMEM);
647 memset(s->residues, 0, s->residues_buf_size);
649 for (i = 0; i < length; i++)
650 s->residues[i] = p2[i] >> dshift;
654 for (i = 0; i < length2; i++) {
657 v += s->dsp.scalarproduct_int16(&s->residues[i], filter,
658 FFALIGN(filter_order, 16));
660 p1[i] = (av_clip(v >> 10, -8192, 8191) << dshift) - p1[i];
671 static int tak_decode_frame(AVCodecContext *avctx, void *data,
672 int *got_frame_ptr, AVPacket *pkt)
674 TAKDecContext *s = avctx->priv_data;
675 AVFrame *frame = data;
676 GetBitContext *gb = &s->gb;
677 int chan, i, ret, hsize;
679 if (pkt->size < TAK_MIN_FRAME_HEADER_BYTES)
680 return AVERROR_INVALIDDATA;
682 init_get_bits(gb, pkt->data, pkt->size * 8);
684 if ((ret = ff_tak_decode_frame_header(avctx, gb, &s->ti, 0)) < 0)
687 if (s->ti.flags & TAK_FRAME_FLAG_HAS_METADATA) {
688 av_log_missing_feature(avctx, "frame metadata", 1);
689 return AVERROR_PATCHWELCOME;
692 hsize = get_bits_count(gb) / 8;
693 if (avctx->err_recognition & AV_EF_CRCCHECK) {
694 if (ff_tak_check_crc(pkt->data, hsize)) {
695 av_log(avctx, AV_LOG_ERROR, "CRC error\n");
696 return AVERROR_INVALIDDATA;
700 if (s->ti.codec != TAK_CODEC_MONO_STEREO &&
701 s->ti.codec != TAK_CODEC_MULTICHANNEL) {
702 av_log(avctx, AV_LOG_ERROR, "unsupported codec: %d\n", s->ti.codec);
703 return AVERROR_PATCHWELCOME;
705 if (s->ti.data_type) {
706 av_log(avctx, AV_LOG_ERROR,
707 "unsupported data type: %d\n", s->ti.data_type);
708 return AVERROR_INVALIDDATA;
710 if (s->ti.codec == TAK_CODEC_MONO_STEREO && s->ti.channels > 2) {
711 av_log(avctx, AV_LOG_ERROR,
712 "invalid number of channels: %d\n", s->ti.channels);
713 return AVERROR_INVALIDDATA;
715 if (s->ti.channels > 6) {
716 av_log(avctx, AV_LOG_ERROR,
717 "unsupported number of channels: %d\n", s->ti.channels);
718 return AVERROR_INVALIDDATA;
721 if (s->ti.frame_samples <= 0) {
722 av_log(avctx, AV_LOG_ERROR, "unsupported/invalid number of samples\n");
723 return AVERROR_INVALIDDATA;
726 if (s->ti.bps != avctx->bits_per_coded_sample) {
727 avctx->bits_per_coded_sample = s->ti.bps;
728 if ((ret = set_bps_params(avctx)) < 0)
731 if (s->ti.sample_rate != avctx->sample_rate) {
732 avctx->sample_rate = s->ti.sample_rate;
733 set_sample_rate_params(avctx);
736 avctx->channel_layout = s->ti.ch_layout;
737 avctx->channels = s->ti.channels;
739 s->nb_samples = s->ti.last_frame_samples ? s->ti.last_frame_samples
740 : s->ti.frame_samples;
742 frame->nb_samples = s->nb_samples;
743 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
746 if (avctx->bits_per_coded_sample <= 16) {
747 int buf_size = av_samples_get_buffer_size(NULL, avctx->channels,
749 AV_SAMPLE_FMT_S32P, 0);
750 av_fast_malloc(&s->decode_buffer, &s->decode_buffer_size, buf_size);
751 if (!s->decode_buffer)
752 return AVERROR(ENOMEM);
753 ret = av_samples_fill_arrays((uint8_t **)s->decoded, NULL,
754 s->decode_buffer, avctx->channels,
755 s->nb_samples, AV_SAMPLE_FMT_S32P, 0);
759 for (chan = 0; chan < avctx->channels; chan++)
760 s->decoded[chan] = (int32_t *)frame->extended_data[chan];
763 if (s->nb_samples < 16) {
764 for (chan = 0; chan < avctx->channels; chan++) {
765 int32_t *decoded = s->decoded[chan];
766 for (i = 0; i < s->nb_samples; i++)
767 decoded[i] = get_sbits(gb, avctx->bits_per_coded_sample);
770 if (s->ti.codec == TAK_CODEC_MONO_STEREO) {
771 for (chan = 0; chan < avctx->channels; chan++)
772 if (ret = decode_channel(s, chan))
775 if (avctx->channels == 2) {
777 // some kind of subframe length, but it seems to be unused
781 s->dmode = get_bits(gb, 3);
782 if (ret = decorrelate(s, 0, 1, s->nb_samples - 1))
785 } else if (s->ti.codec == TAK_CODEC_MULTICHANNEL) {
789 chan = get_bits(gb, 4) + 1;
790 if (chan > avctx->channels)
791 return AVERROR_INVALIDDATA;
793 for (i = 0; i < chan; i++) {
794 int nbit = get_bits(gb, 4);
796 if (nbit >= avctx->channels)
797 return AVERROR_INVALIDDATA;
799 if (ch_mask & 1 << nbit)
800 return AVERROR_INVALIDDATA;
802 s->mcdparams[i].present = get_bits1(gb);
803 if (s->mcdparams[i].present) {
804 s->mcdparams[i].index = get_bits(gb, 2);
805 s->mcdparams[i].chan2 = get_bits(gb, 4);
806 if (s->mcdparams[i].index == 1) {
807 if ((nbit == s->mcdparams[i].chan2) ||
808 (ch_mask & 1 << s->mcdparams[i].chan2))
809 return AVERROR_INVALIDDATA;
811 ch_mask |= 1 << s->mcdparams[i].chan2;
812 } else if (!(ch_mask & 1 << s->mcdparams[i].chan2)) {
813 return AVERROR_INVALIDDATA;
816 s->mcdparams[i].chan1 = nbit;
818 ch_mask |= 1 << nbit;
821 chan = avctx->channels;
822 for (i = 0; i < chan; i++) {
823 s->mcdparams[i].present = 0;
824 s->mcdparams[i].chan1 = i;
828 for (i = 0; i < chan; i++) {
829 if (s->mcdparams[i].present && s->mcdparams[i].index == 1)
830 if (ret = decode_channel(s, s->mcdparams[i].chan2))
833 if (ret = decode_channel(s, s->mcdparams[i].chan1))
836 if (s->mcdparams[i].present) {
837 s->dmode = mc_dmodes[s->mcdparams[i].index];
838 if (ret = decorrelate(s,
839 s->mcdparams[i].chan2,
840 s->mcdparams[i].chan1,
847 for (chan = 0; chan < avctx->channels; chan++) {
848 int32_t *decoded = s->decoded[chan];
850 if (s->lpc_mode[chan])
851 decode_lpc(decoded, s->lpc_mode[chan], s->nb_samples);
853 if (s->sample_shift[chan] > 0)
854 for (i = 0; i < s->nb_samples; i++)
855 decoded[i] <<= s->sample_shift[chan];
861 if (get_bits_left(gb) < 0)
862 av_log(avctx, AV_LOG_DEBUG, "overread\n");
863 else if (get_bits_left(gb) > 0)
864 av_log(avctx, AV_LOG_DEBUG, "underread\n");
866 if (avctx->err_recognition & AV_EF_CRCCHECK) {
867 if (ff_tak_check_crc(pkt->data + hsize,
868 get_bits_count(gb) / 8 - hsize)) {
869 av_log(avctx, AV_LOG_ERROR, "CRC error\n");
870 return AVERROR_INVALIDDATA;
874 /* convert to output buffer */
875 switch (avctx->sample_fmt) {
876 case AV_SAMPLE_FMT_U8P:
877 for (chan = 0; chan < avctx->channels; chan++) {
878 uint8_t *samples = (uint8_t *)frame->extended_data[chan];
879 int32_t *decoded = s->decoded[chan];
880 for (i = 0; i < s->nb_samples; i++)
881 samples[i] = decoded[i] + 0x80;
884 case AV_SAMPLE_FMT_S16P:
885 for (chan = 0; chan < avctx->channels; chan++) {
886 int16_t *samples = (int16_t *)frame->extended_data[chan];
887 int32_t *decoded = s->decoded[chan];
888 for (i = 0; i < s->nb_samples; i++)
889 samples[i] = decoded[i];
892 case AV_SAMPLE_FMT_S32P:
893 for (chan = 0; chan < avctx->channels; chan++) {
894 int32_t *samples = (int32_t *)frame->extended_data[chan];
895 for (i = 0; i < s->nb_samples; i++)
906 static av_cold int tak_decode_close(AVCodecContext *avctx)
908 TAKDecContext *s = avctx->priv_data;
910 av_freep(&s->decode_buffer);
911 av_freep(&s->residues);
916 AVCodec ff_tak_decoder = {
918 .type = AVMEDIA_TYPE_AUDIO,
919 .id = AV_CODEC_ID_TAK,
920 .priv_data_size = sizeof(TAKDecContext),
921 .init = tak_decode_init,
922 .init_static_data = tak_init_static_data,
923 .close = tak_decode_close,
924 .decode = tak_decode_frame,
925 .capabilities = CODEC_CAP_DR1,
926 .long_name = NULL_IF_CONFIG_SMALL("TAK (Tom's lossless Audio Kompressor)"),
927 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_U8P,
930 AV_SAMPLE_FMT_NONE },