2 * WavPack lossless audio decoder
3 * Copyright (c) 2006,2011 Konstantin Shishkov
5 * This file is part of FFmpeg.
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.
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.
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
22 #define BITSTREAM_READER_LE
24 #include "libavutil/channel_layout.h"
30 #include "bytestream.h"
35 * WavPack lossless audio decoder
38 typedef struct SavedContext {
45 typedef struct WavpackFrameContext {
46 AVCodecContext *avctx;
48 int stereo, stereo_in;
53 uint32_t crc_extra_bits;
54 GetBitContext gb_extra_bits;
55 int data_size; // in bits
58 Decorr decorr[MAX_TERMS];
59 int zero, one, zeroes;
63 int hybrid, hybrid_bitrate;
64 int hybrid_maxclip, hybrid_minclip;
70 SavedContext sc, extra_sc;
71 } WavpackFrameContext;
73 #define WV_MAX_FRAME_DECODERS 14
75 typedef struct WavpackContext {
76 AVCodecContext *avctx;
78 WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS];
86 #define LEVEL_DECAY(a) (((a) + 0x80) >> 8)
88 static av_always_inline int get_tail(GetBitContext *gb, int k)
95 e = (1 << (p + 1)) - k - 1;
96 res = p ? get_bits(gb, p) : 0;
98 res = (res << 1) - e + get_bits1(gb);
102 static void update_error_limit(WavpackFrameContext *ctx)
106 for (i = 0; i <= ctx->stereo_in; i++) {
107 ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta;
108 br[i] = ctx->ch[i].bitrate_acc >> 16;
109 sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level);
111 if (ctx->stereo_in && ctx->hybrid_bitrate) {
112 int balance = (sl[1] - sl[0] + br[1] + 1) >> 1;
113 if (balance > br[0]) {
116 } else if (-balance > br[0]) {
120 br[1] = br[0] + balance;
121 br[0] = br[0] - balance;
124 for (i = 0; i <= ctx->stereo_in; i++) {
125 if (ctx->hybrid_bitrate) {
126 if (sl[i] - br[i] > -0x100)
127 ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100);
129 ctx->ch[i].error_limit = 0;
131 ctx->ch[i].error_limit = wp_exp2(br[i]);
136 static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
137 int channel, int *last)
140 int sign, base, add, ret;
141 WvChannel *c = &ctx->ch[channel];
145 if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) &&
146 !ctx->zero && !ctx->one) {
150 c->slow_level -= LEVEL_DECAY(c->slow_level);
154 t = get_unary_0_33(gb);
156 if (get_bits_left(gb) < t - 1)
158 t = get_bits_long(gb, t - 1) | (1 << (t - 1));
160 if (get_bits_left(gb) < 0)
165 memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median));
166 memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median));
167 c->slow_level -= LEVEL_DECAY(c->slow_level);
177 t = get_unary_0_33(gb);
178 if (get_bits_left(gb) < 0)
181 t2 = get_unary_0_33(gb);
183 if (get_bits_left(gb) < 0)
187 if (get_bits_left(gb) < t2 - 1)
189 t += get_bits_long(gb, t2 - 1) | (1 << (t2 - 1));
200 ctx->zero = !ctx->one;
203 if (ctx->hybrid && !channel)
204 update_error_limit(ctx);
208 add = GET_MED(0) - 1;
212 add = GET_MED(1) - 1;
216 base = GET_MED(0) + GET_MED(1);
217 add = GET_MED(2) - 1;
222 base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2);
223 add = GET_MED(2) - 1;
228 if (!c->error_limit) {
229 if (add >= 0x2000000U) {
230 av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add);
233 ret = base + get_tail(gb, add);
234 if (get_bits_left(gb) <= 0)
237 int mid = (base * 2 + add + 1) >> 1;
238 while (add > c->error_limit) {
239 if (get_bits_left(gb) <= 0)
245 add = mid - base - 1;
246 mid = (base * 2 + add + 1) >> 1;
250 sign = get_bits1(gb);
251 if (ctx->hybrid_bitrate)
252 c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level);
253 return sign ? ~ret : ret;
256 ret = get_bits_left(gb);
258 av_log(ctx->avctx, AV_LOG_ERROR, "Too few bits (%d) left\n", ret);
264 static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc,
272 if (s->got_extra_bits &&
273 get_bits_left(&s->gb_extra_bits) >= s->extra_bits) {
274 S |= get_bits_long(&s->gb_extra_bits, s->extra_bits);
275 *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16);
279 bit = (S & s->and) | s->or;
280 bit = ((S + bit) << s->shift) - bit;
283 bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip);
285 return bit << s->post_shift;
288 static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S)
296 int exp = s->float_max_exp;
298 if (s->got_extra_bits) {
299 const int max_bits = 1 + 23 + 8 + 1;
300 const int left_bits = get_bits_left(&s->gb_extra_bits);
302 if (left_bits + 8 * AV_INPUT_BUFFER_PADDING_SIZE < max_bits)
307 S <<= s->float_shift;
311 if (S >= 0x1000000) {
312 if (s->got_extra_bits && get_bits1(&s->gb_extra_bits))
313 S = get_bits(&s->gb_extra_bits, 23);
318 int shift = 23 - av_log2(S);
319 exp = s->float_max_exp;
326 if ((s->float_flag & WV_FLT_SHIFT_ONES) ||
327 (s->got_extra_bits &&
328 (s->float_flag & WV_FLT_SHIFT_SAME) &&
329 get_bits1(&s->gb_extra_bits))) {
330 S |= (1 << shift) - 1;
331 } else if (s->got_extra_bits &&
332 (s->float_flag & WV_FLT_SHIFT_SENT)) {
333 S |= get_bits(&s->gb_extra_bits, shift);
337 exp = s->float_max_exp;
343 if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) {
344 if (get_bits1(&s->gb_extra_bits)) {
345 S = get_bits(&s->gb_extra_bits, 23);
346 if (s->float_max_exp >= 25)
347 exp = get_bits(&s->gb_extra_bits, 8);
348 sign = get_bits1(&s->gb_extra_bits);
350 if (s->float_flag & WV_FLT_ZERO_SIGN)
351 sign = get_bits1(&s->gb_extra_bits);
356 *crc = *crc * 27 + S * 9 + exp * 3 + sign;
358 value.u = (sign << 31) | (exp << 23) | S;
362 static void wv_reset_saved_context(WavpackFrameContext *s)
365 s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF;
368 static inline int wv_check_crc(WavpackFrameContext *s, uint32_t crc,
369 uint32_t crc_extra_bits)
372 av_log(s->avctx, AV_LOG_ERROR, "CRC error\n");
373 return AVERROR_INVALIDDATA;
375 if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) {
376 av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n");
377 return AVERROR_INVALIDDATA;
383 static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb,
384 void *dst_l, void *dst_r, const int type)
388 int A, B, L, L2, R, R2;
390 uint32_t crc = s->sc.crc;
391 uint32_t crc_extra_bits = s->extra_sc.crc;
392 int16_t *dst16_l = dst_l;
393 int16_t *dst16_r = dst_r;
394 int32_t *dst32_l = dst_l;
395 int32_t *dst32_r = dst_r;
396 float *dstfl_l = dst_l;
397 float *dstfl_r = dst_r;
399 s->one = s->zero = s->zeroes = 0;
401 L = wv_get_value(s, gb, 0, &last);
404 R = wv_get_value(s, gb, 1, &last);
407 for (i = 0; i < s->terms; i++) {
408 t = s->decorr[i].value;
412 A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
413 B = 2 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1];
415 A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
416 B = (3 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1;
418 s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
419 s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0];
422 A = s->decorr[i].samplesA[pos];
423 B = s->decorr[i].samplesB[pos];
426 if (type != AV_SAMPLE_FMT_S16P) {
427 L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10);
428 R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10);
430 L2 = L + ((s->decorr[i].weightA * A + 512) >> 10);
431 R2 = R + ((s->decorr[i].weightB * B + 512) >> 10);
434 s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta;
436 s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta;
437 s->decorr[i].samplesA[j] = L = L2;
438 s->decorr[i].samplesB[j] = R = R2;
439 } else if (t == -1) {
440 if (type != AV_SAMPLE_FMT_S16P)
441 L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10);
443 L2 = L + ((s->decorr[i].weightA * s->decorr[i].samplesA[0] + 512) >> 10);
444 UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L);
446 if (type != AV_SAMPLE_FMT_S16P)
447 R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10);
449 R2 = R + ((s->decorr[i].weightB * L2 + 512) >> 10);
450 UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R);
452 s->decorr[i].samplesA[0] = R;
454 if (type != AV_SAMPLE_FMT_S16P)
455 R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10);
457 R2 = R + ((s->decorr[i].weightB * s->decorr[i].samplesB[0] + 512) >> 10);
458 UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R);
462 R2 = s->decorr[i].samplesA[0];
463 s->decorr[i].samplesA[0] = R;
466 if (type != AV_SAMPLE_FMT_S16P)
467 L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10);
469 L2 = L + ((s->decorr[i].weightA * R2 + 512) >> 10);
470 UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L);
472 s->decorr[i].samplesB[0] = L;
476 if (type == AV_SAMPLE_FMT_S16P) {
477 if (FFABS(L) + FFABS(R) > (1<<19)) {
478 av_log(s->avctx, AV_LOG_ERROR, "sample %d %d too large\n", L, R);
479 return AVERROR_INVALIDDATA;
485 L += (R -= (L >> 1));
486 crc = (crc * 3 + L) * 3 + R;
488 if (type == AV_SAMPLE_FMT_FLTP) {
489 *dstfl_l++ = wv_get_value_float(s, &crc_extra_bits, L);
490 *dstfl_r++ = wv_get_value_float(s, &crc_extra_bits, R);
491 } else if (type == AV_SAMPLE_FMT_S32P) {
492 *dst32_l++ = wv_get_value_integer(s, &crc_extra_bits, L);
493 *dst32_r++ = wv_get_value_integer(s, &crc_extra_bits, R);
495 *dst16_l++ = wv_get_value_integer(s, &crc_extra_bits, L);
496 *dst16_r++ = wv_get_value_integer(s, &crc_extra_bits, R);
499 } while (!last && count < s->samples);
501 wv_reset_saved_context(s);
503 if (last && count < s->samples) {
504 int size = av_get_bytes_per_sample(type);
505 memset((uint8_t*)dst_l + count*size, 0, (s->samples-count)*size);
506 memset((uint8_t*)dst_r + count*size, 0, (s->samples-count)*size);
509 if ((s->avctx->err_recognition & AV_EF_CRCCHECK) &&
510 wv_check_crc(s, crc, crc_extra_bits))
511 return AVERROR_INVALIDDATA;
516 static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb,
517 void *dst, const int type)
523 uint32_t crc = s->sc.crc;
524 uint32_t crc_extra_bits = s->extra_sc.crc;
525 int16_t *dst16 = dst;
526 int32_t *dst32 = dst;
529 s->one = s->zero = s->zeroes = 0;
531 T = wv_get_value(s, gb, 0, &last);
535 for (i = 0; i < s->terms; i++) {
536 t = s->decorr[i].value;
539 A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1];
541 A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1;
542 s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0];
545 A = s->decorr[i].samplesA[pos];
548 if (type != AV_SAMPLE_FMT_S16P)
549 S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10);
551 S = T + ((s->decorr[i].weightA * A + 512) >> 10);
553 s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta;
554 s->decorr[i].samplesA[j] = T = S;
559 if (type == AV_SAMPLE_FMT_FLTP) {
560 *dstfl++ = wv_get_value_float(s, &crc_extra_bits, S);
561 } else if (type == AV_SAMPLE_FMT_S32P) {
562 *dst32++ = wv_get_value_integer(s, &crc_extra_bits, S);
564 *dst16++ = wv_get_value_integer(s, &crc_extra_bits, S);
567 } while (!last && count < s->samples);
569 wv_reset_saved_context(s);
571 if (last && count < s->samples) {
572 int size = av_get_bytes_per_sample(type);
573 memset((uint8_t*)dst + count*size, 0, (s->samples-count)*size);
576 if (s->avctx->err_recognition & AV_EF_CRCCHECK) {
577 int ret = wv_check_crc(s, crc, crc_extra_bits);
578 if (ret < 0 && s->avctx->err_recognition & AV_EF_EXPLODE)
585 static av_cold int wv_alloc_frame_context(WavpackContext *c)
587 if (c->fdec_num == WV_MAX_FRAME_DECODERS)
590 c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec));
591 if (!c->fdec[c->fdec_num])
594 c->fdec[c->fdec_num - 1]->avctx = c->avctx;
595 wv_reset_saved_context(c->fdec[c->fdec_num - 1]);
601 static int init_thread_copy(AVCodecContext *avctx)
603 WavpackContext *s = avctx->priv_data;
609 static av_cold int wavpack_decode_init(AVCodecContext *avctx)
611 WavpackContext *s = avctx->priv_data;
620 static av_cold int wavpack_decode_end(AVCodecContext *avctx)
622 WavpackContext *s = avctx->priv_data;
625 for (i = 0; i < s->fdec_num; i++)
626 av_freep(&s->fdec[i]);
632 static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
633 AVFrame *frame, const uint8_t *buf, int buf_size)
635 WavpackContext *wc = avctx->priv_data;
636 ThreadFrame tframe = { .f = frame };
637 WavpackFrameContext *s;
639 void *samples_l = NULL, *samples_r = NULL;
641 int got_terms = 0, got_weights = 0, got_samples = 0,
642 got_entropy = 0, got_bs = 0, got_float = 0, got_hybrid = 0;
643 int i, j, id, size, ssize, weights, t;
644 int bpp, chan = 0, chmask = 0, orig_bpp, sample_rate = 0;
647 if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) {
648 av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n");
649 return AVERROR_INVALIDDATA;
652 s = wc->fdec[block_no];
654 av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n",
656 return AVERROR_INVALIDDATA;
659 memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr));
660 memset(s->ch, 0, sizeof(s->ch));
662 s->and = s->or = s->shift = 0;
663 s->got_extra_bits = 0;
665 bytestream2_init(&gb, buf, buf_size);
667 s->samples = bytestream2_get_le32(&gb);
668 if (s->samples != wc->samples) {
669 av_log(avctx, AV_LOG_ERROR, "Mismatching number of samples in "
670 "a sequence: %d and %d\n", wc->samples, s->samples);
671 return AVERROR_INVALIDDATA;
673 s->frame_flags = bytestream2_get_le32(&gb);
674 bpp = av_get_bytes_per_sample(avctx->sample_fmt);
675 orig_bpp = ((s->frame_flags & 0x03) + 1) << 3;
676 multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK;
678 s->stereo = !(s->frame_flags & WV_MONO);
679 s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo;
680 s->joint = s->frame_flags & WV_JOINT_STEREO;
681 s->hybrid = s->frame_flags & WV_HYBRID_MODE;
682 s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE;
683 s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f);
684 s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1);
685 s->hybrid_minclip = ((-1LL << (orig_bpp - 1)));
686 s->CRC = bytestream2_get_le32(&gb);
688 // parse metadata blocks
689 while (bytestream2_get_bytes_left(&gb)) {
690 id = bytestream2_get_byte(&gb);
691 size = bytestream2_get_byte(&gb);
692 if (id & WP_IDF_LONG) {
693 size |= (bytestream2_get_byte(&gb)) << 8;
694 size |= (bytestream2_get_byte(&gb)) << 16;
696 size <<= 1; // size is specified in words
701 av_log(avctx, AV_LOG_ERROR,
702 "Got incorrect block %02X with size %i\n", id, size);
705 if (bytestream2_get_bytes_left(&gb) < ssize) {
706 av_log(avctx, AV_LOG_ERROR,
707 "Block size %i is out of bounds\n", size);
710 switch (id & WP_IDF_MASK) {
712 if (size > MAX_TERMS) {
713 av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n");
715 bytestream2_skip(&gb, ssize);
719 for (i = 0; i < s->terms; i++) {
720 uint8_t val = bytestream2_get_byte(&gb);
721 s->decorr[s->terms - i - 1].value = (val & 0x1F) - 5;
722 s->decorr[s->terms - i - 1].delta = val >> 5;
726 case WP_ID_DECWEIGHTS:
728 av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n");
731 weights = size >> s->stereo_in;
732 if (weights > MAX_TERMS || weights > s->terms) {
733 av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n");
734 bytestream2_skip(&gb, ssize);
737 for (i = 0; i < weights; i++) {
738 t = (int8_t)bytestream2_get_byte(&gb);
739 s->decorr[s->terms - i - 1].weightA = t << 3;
740 if (s->decorr[s->terms - i - 1].weightA > 0)
741 s->decorr[s->terms - i - 1].weightA +=
742 (s->decorr[s->terms - i - 1].weightA + 64) >> 7;
744 t = (int8_t)bytestream2_get_byte(&gb);
745 s->decorr[s->terms - i - 1].weightB = t << 3;
746 if (s->decorr[s->terms - i - 1].weightB > 0)
747 s->decorr[s->terms - i - 1].weightB +=
748 (s->decorr[s->terms - i - 1].weightB + 64) >> 7;
753 case WP_ID_DECSAMPLES:
755 av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n");
759 for (i = s->terms - 1; (i >= 0) && (t < size); i--) {
760 if (s->decorr[i].value > 8) {
761 s->decorr[i].samplesA[0] =
762 wp_exp2(bytestream2_get_le16(&gb));
763 s->decorr[i].samplesA[1] =
764 wp_exp2(bytestream2_get_le16(&gb));
767 s->decorr[i].samplesB[0] =
768 wp_exp2(bytestream2_get_le16(&gb));
769 s->decorr[i].samplesB[1] =
770 wp_exp2(bytestream2_get_le16(&gb));
774 } else if (s->decorr[i].value < 0) {
775 s->decorr[i].samplesA[0] =
776 wp_exp2(bytestream2_get_le16(&gb));
777 s->decorr[i].samplesB[0] =
778 wp_exp2(bytestream2_get_le16(&gb));
781 for (j = 0; j < s->decorr[i].value; j++) {
782 s->decorr[i].samplesA[j] =
783 wp_exp2(bytestream2_get_le16(&gb));
785 s->decorr[i].samplesB[j] =
786 wp_exp2(bytestream2_get_le16(&gb));
789 t += s->decorr[i].value * 2 * (s->stereo_in + 1);
795 if (size != 6 * (s->stereo_in + 1)) {
796 av_log(avctx, AV_LOG_ERROR,
797 "Entropy vars size should be %i, got %i.\n",
798 6 * (s->stereo_in + 1), size);
799 bytestream2_skip(&gb, ssize);
802 for (j = 0; j <= s->stereo_in; j++)
803 for (i = 0; i < 3; i++) {
804 s->ch[j].median[i] = wp_exp2(bytestream2_get_le16(&gb));
809 if (s->hybrid_bitrate) {
810 for (i = 0; i <= s->stereo_in; i++) {
811 s->ch[i].slow_level = wp_exp2(bytestream2_get_le16(&gb));
815 for (i = 0; i < (s->stereo_in + 1); i++) {
816 s->ch[i].bitrate_acc = bytestream2_get_le16(&gb) << 16;
820 for (i = 0; i < (s->stereo_in + 1); i++) {
821 s->ch[i].bitrate_delta =
822 wp_exp2((int16_t)bytestream2_get_le16(&gb));
825 for (i = 0; i < (s->stereo_in + 1); i++)
826 s->ch[i].bitrate_delta = 0;
830 case WP_ID_INT32INFO: {
833 av_log(avctx, AV_LOG_ERROR,
834 "Invalid INT32INFO, size = %i\n",
836 bytestream2_skip(&gb, ssize - 4);
839 bytestream2_get_buffer(&gb, val, 4);
841 av_log(avctx, AV_LOG_ERROR,
842 "Invalid INT32INFO, extra_bits = %d (> 32)\n", val[0]);
845 s->extra_bits = val[0];
855 /* original WavPack decoder forces 32-bit lossy sound to be treated
856 * as 24-bit one in order to have proper clipping */
857 if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) {
860 s->hybrid_maxclip >>= 8;
861 s->hybrid_minclip >>= 8;
865 case WP_ID_FLOATINFO:
867 av_log(avctx, AV_LOG_ERROR,
868 "Invalid FLOATINFO, size = %i\n", size);
869 bytestream2_skip(&gb, ssize);
872 s->float_flag = bytestream2_get_byte(&gb);
873 s->float_shift = bytestream2_get_byte(&gb);
874 s->float_max_exp = bytestream2_get_byte(&gb);
876 bytestream2_skip(&gb, 1);
879 s->sc.offset = bytestream2_tell(&gb);
880 s->sc.size = size * 8;
881 if ((ret = init_get_bits8(&s->gb, gb.buffer, size)) < 0)
883 s->data_size = size * 8;
884 bytestream2_skip(&gb, size);
887 case WP_ID_EXTRABITS:
889 av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n",
891 bytestream2_skip(&gb, size);
894 s->extra_sc.offset = bytestream2_tell(&gb);
895 s->extra_sc.size = size * 8;
896 if ((ret = init_get_bits8(&s->gb_extra_bits, gb.buffer, size)) < 0)
898 s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32);
899 bytestream2_skip(&gb, size);
900 s->got_extra_bits = 1;
904 av_log(avctx, AV_LOG_ERROR,
905 "Insufficient channel information\n");
906 return AVERROR_INVALIDDATA;
908 chan = bytestream2_get_byte(&gb);
911 chmask = bytestream2_get_byte(&gb);
914 chmask = bytestream2_get_le16(&gb);
917 chmask = bytestream2_get_le24(&gb);
920 chmask = bytestream2_get_le32(&gb);
923 size = bytestream2_get_byte(&gb);
924 if (avctx->channels != size)
925 av_log(avctx, AV_LOG_WARNING, "%i channels signalled"
926 " instead of %i.\n", size, avctx->channels);
927 chan |= (bytestream2_get_byte(&gb) & 0xF) << 8;
928 chmask = bytestream2_get_le16(&gb);
931 av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n",
933 chan = avctx->channels;
934 chmask = avctx->channel_layout;
937 case WP_ID_SAMPLE_RATE:
939 av_log(avctx, AV_LOG_ERROR, "Invalid custom sample rate.\n");
940 return AVERROR_INVALIDDATA;
942 sample_rate = bytestream2_get_le24(&gb);
945 bytestream2_skip(&gb, size);
948 bytestream2_skip(&gb, 1);
952 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n");
953 return AVERROR_INVALIDDATA;
956 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n");
957 return AVERROR_INVALIDDATA;
960 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n");
961 return AVERROR_INVALIDDATA;
964 av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n");
965 return AVERROR_INVALIDDATA;
967 if (s->hybrid && !got_hybrid) {
968 av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n");
969 return AVERROR_INVALIDDATA;
972 av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n");
973 return AVERROR_INVALIDDATA;
975 if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLTP) {
976 av_log(avctx, AV_LOG_ERROR, "Float information not found\n");
977 return AVERROR_INVALIDDATA;
979 if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLTP) {
980 const int size = get_bits_left(&s->gb_extra_bits);
981 const int wanted = s->samples * s->extra_bits << s->stereo_in;
983 av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n");
984 s->got_extra_bits = 0;
988 if (!wc->ch_offset) {
989 int sr = (s->frame_flags >> 23) & 0xf;
992 av_log(avctx, AV_LOG_ERROR, "Custom sample rate missing.\n");
993 return AVERROR_INVALIDDATA;
995 avctx->sample_rate = sample_rate;
997 avctx->sample_rate = wv_rates[sr];
1001 avctx->channels = chan;
1003 avctx->channel_layout = chmask;
1005 avctx->channels = s->stereo ? 2 : 1;
1006 avctx->channel_layout = s->stereo ? AV_CH_LAYOUT_STEREO :
1010 /* get output buffer */
1011 frame->nb_samples = s->samples + 1;
1012 if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0)
1014 frame->nb_samples = s->samples;
1017 if (wc->ch_offset + s->stereo >= avctx->channels) {
1018 av_log(avctx, AV_LOG_WARNING, "Too many channels coded in a packet.\n");
1019 return (avctx->err_recognition & AV_EF_EXPLODE) ? AVERROR_INVALIDDATA : 0;
1022 samples_l = frame->extended_data[wc->ch_offset];
1024 samples_r = frame->extended_data[wc->ch_offset + 1];
1026 wc->ch_offset += 1 + s->stereo;
1029 ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt);
1033 ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt);
1038 memcpy(samples_r, samples_l, bpp * s->samples);
1044 static void wavpack_decode_flush(AVCodecContext *avctx)
1046 WavpackContext *s = avctx->priv_data;
1049 for (i = 0; i < s->fdec_num; i++)
1050 wv_reset_saved_context(s->fdec[i]);
1053 static int wavpack_decode_frame(AVCodecContext *avctx, void *data,
1054 int *got_frame_ptr, AVPacket *avpkt)
1056 WavpackContext *s = avctx->priv_data;
1057 const uint8_t *buf = avpkt->data;
1058 int buf_size = avpkt->size;
1059 AVFrame *frame = data;
1060 int frame_size, ret, frame_flags;
1062 if (avpkt->size <= WV_HEADER_SIZE)
1063 return AVERROR_INVALIDDATA;
1068 /* determine number of samples */
1069 s->samples = AV_RL32(buf + 20);
1070 frame_flags = AV_RL32(buf + 24);
1071 if (s->samples <= 0 || s->samples > WV_MAX_SAMPLES) {
1072 av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n",
1074 return AVERROR_INVALIDDATA;
1077 if (frame_flags & 0x80) {
1078 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1079 } else if ((frame_flags & 0x03) <= 1) {
1080 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
1082 avctx->sample_fmt = AV_SAMPLE_FMT_S32P;
1083 avctx->bits_per_raw_sample = ((frame_flags & 0x03) + 1) << 3;
1086 while (buf_size > 0) {
1087 if (buf_size <= WV_HEADER_SIZE)
1089 frame_size = AV_RL32(buf + 4) - 12;
1092 if (frame_size <= 0 || frame_size > buf_size) {
1093 av_log(avctx, AV_LOG_ERROR,
1094 "Block %d has invalid size (size %d vs. %d bytes left)\n",
1095 s->block, frame_size, buf_size);
1096 wavpack_decode_flush(avctx);
1097 return AVERROR_INVALIDDATA;
1099 if ((ret = wavpack_decode_block(avctx, s->block,
1100 frame, buf, frame_size)) < 0) {
1101 wavpack_decode_flush(avctx);
1106 buf_size -= frame_size;
1109 if (s->ch_offset != avctx->channels) {
1110 av_log(avctx, AV_LOG_ERROR, "Not enough channels coded in a packet.\n");
1111 return AVERROR_INVALIDDATA;
1119 AVCodec ff_wavpack_decoder = {
1121 .long_name = NULL_IF_CONFIG_SMALL("WavPack"),
1122 .type = AVMEDIA_TYPE_AUDIO,
1123 .id = AV_CODEC_ID_WAVPACK,
1124 .priv_data_size = sizeof(WavpackContext),
1125 .init = wavpack_decode_init,
1126 .close = wavpack_decode_end,
1127 .decode = wavpack_decode_frame,
1128 .flush = wavpack_decode_flush,
1129 .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy),
1130 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,