| /* |
| * WavPack lossless audio decoder |
| * Copyright (c) 2006,2011 Konstantin Shishkov |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #define BITSTREAM_READER_LE |
| |
| #include "libavutil/audioconvert.h" |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "unary.h" |
| |
| /** |
| * @file |
| * WavPack lossless audio decoder |
| */ |
| |
| #define WV_MONO 0x00000004 |
| #define WV_JOINT_STEREO 0x00000010 |
| #define WV_FALSE_STEREO 0x40000000 |
| |
| #define WV_HYBRID_MODE 0x00000008 |
| #define WV_HYBRID_SHAPE 0x00000008 |
| #define WV_HYBRID_BITRATE 0x00000200 |
| #define WV_HYBRID_BALANCE 0x00000400 |
| |
| #define WV_FLT_SHIFT_ONES 0x01 |
| #define WV_FLT_SHIFT_SAME 0x02 |
| #define WV_FLT_SHIFT_SENT 0x04 |
| #define WV_FLT_ZERO_SENT 0x08 |
| #define WV_FLT_ZERO_SIGN 0x10 |
| |
| enum WP_ID_Flags { |
| WP_IDF_MASK = 0x1F, |
| WP_IDF_IGNORE = 0x20, |
| WP_IDF_ODD = 0x40, |
| WP_IDF_LONG = 0x80 |
| }; |
| |
| enum WP_ID { |
| WP_ID_DUMMY = 0, |
| WP_ID_ENCINFO, |
| WP_ID_DECTERMS, |
| WP_ID_DECWEIGHTS, |
| WP_ID_DECSAMPLES, |
| WP_ID_ENTROPY, |
| WP_ID_HYBRID, |
| WP_ID_SHAPING, |
| WP_ID_FLOATINFO, |
| WP_ID_INT32INFO, |
| WP_ID_DATA, |
| WP_ID_CORR, |
| WP_ID_EXTRABITS, |
| WP_ID_CHANINFO |
| }; |
| |
| typedef struct SavedContext { |
| int offset; |
| int size; |
| int bits_used; |
| uint32_t crc; |
| } SavedContext; |
| |
| #define MAX_TERMS 16 |
| |
| typedef struct Decorr { |
| int delta; |
| int value; |
| int weightA; |
| int weightB; |
| int samplesA[8]; |
| int samplesB[8]; |
| } Decorr; |
| |
| typedef struct WvChannel { |
| int median[3]; |
| int slow_level, error_limit; |
| int bitrate_acc, bitrate_delta; |
| } WvChannel; |
| |
| typedef struct WavpackFrameContext { |
| AVCodecContext *avctx; |
| int frame_flags; |
| int stereo, stereo_in; |
| int joint; |
| uint32_t CRC; |
| GetBitContext gb; |
| int got_extra_bits; |
| uint32_t crc_extra_bits; |
| GetBitContext gb_extra_bits; |
| int data_size; // in bits |
| int samples; |
| int terms; |
| Decorr decorr[MAX_TERMS]; |
| int zero, one, zeroes; |
| int extra_bits; |
| int and, or, shift; |
| int post_shift; |
| int hybrid, hybrid_bitrate; |
| int hybrid_maxclip, hybrid_minclip; |
| int float_flag; |
| int float_shift; |
| int float_max_exp; |
| WvChannel ch[2]; |
| int pos; |
| SavedContext sc, extra_sc; |
| } WavpackFrameContext; |
| |
| #define WV_MAX_FRAME_DECODERS 14 |
| |
| typedef struct WavpackContext { |
| AVCodecContext *avctx; |
| AVFrame frame; |
| |
| WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS]; |
| int fdec_num; |
| |
| int multichannel; |
| int mkv_mode; |
| int block; |
| int samples; |
| int ch_offset; |
| } WavpackContext; |
| |
| // exponent table copied from WavPack source |
| static const uint8_t wp_exp2_table [256] = { |
| 0x00, 0x01, 0x01, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x08, 0x09, 0x0a, 0x0b, |
| 0x0b, 0x0c, 0x0d, 0x0e, 0x0e, 0x0f, 0x10, 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x15, 0x16, 0x16, |
| 0x17, 0x18, 0x19, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1d, 0x1e, 0x1f, 0x20, 0x20, 0x21, 0x22, 0x23, |
| 0x24, 0x24, 0x25, 0x26, 0x27, 0x28, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, |
| 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3a, 0x3b, 0x3c, 0x3d, |
| 0x3e, 0x3f, 0x40, 0x41, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x48, 0x49, 0x4a, 0x4b, |
| 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, |
| 0x5b, 0x5c, 0x5d, 0x5e, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
| 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
| 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8a, |
| 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, |
| 0x9c, 0x9d, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, |
| 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, |
| 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc8, 0xc9, 0xca, 0xcb, 0xcd, 0xce, 0xcf, 0xd0, 0xd2, 0xd3, 0xd4, |
| 0xd6, 0xd7, 0xd8, 0xd9, 0xdb, 0xdc, 0xdd, 0xde, 0xe0, 0xe1, 0xe2, 0xe4, 0xe5, 0xe6, 0xe8, 0xe9, |
| 0xea, 0xec, 0xed, 0xee, 0xf0, 0xf1, 0xf2, 0xf4, 0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfc, 0xfd, 0xff |
| }; |
| |
| static const uint8_t wp_log2_table [] = { |
| 0x00, 0x01, 0x03, 0x04, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x10, 0x11, 0x12, 0x14, 0x15, |
| 0x16, 0x18, 0x19, 0x1a, 0x1c, 0x1d, 0x1e, 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2a, |
| 0x2c, 0x2d, 0x2e, 0x2f, 0x31, 0x32, 0x33, 0x34, 0x36, 0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3d, 0x3e, |
| 0x3f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4d, 0x4e, 0x4f, 0x50, 0x51, |
| 0x52, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, |
| 0x64, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x74, 0x75, |
| 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, |
| 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, |
| 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, |
| 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb2, |
| 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc0, |
| 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcb, 0xcc, 0xcd, 0xce, |
| 0xcf, 0xd0, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd8, 0xd9, 0xda, 0xdb, |
| 0xdc, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe4, 0xe5, 0xe6, 0xe7, 0xe7, |
| 0xe8, 0xe9, 0xea, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xee, 0xef, 0xf0, 0xf1, 0xf1, 0xf2, 0xf3, 0xf4, |
| 0xf4, 0xf5, 0xf6, 0xf7, 0xf7, 0xf8, 0xf9, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xff, 0xff |
| }; |
| |
| static av_always_inline int wp_exp2(int16_t val) |
| { |
| int res, neg = 0; |
| |
| if (val < 0) { |
| val = -val; |
| neg = 1; |
| } |
| |
| res = wp_exp2_table[val & 0xFF] | 0x100; |
| val >>= 8; |
| res = (val > 9) ? (res << (val - 9)) : (res >> (9 - val)); |
| return neg ? -res : res; |
| } |
| |
| static av_always_inline int wp_log2(int32_t val) |
| { |
| int bits; |
| |
| if (!val) |
| return 0; |
| if (val == 1) |
| return 256; |
| val += val >> 9; |
| bits = av_log2(val) + 1; |
| if (bits < 9) |
| return (bits << 8) + wp_log2_table[(val << (9 - bits)) & 0xFF]; |
| else |
| return (bits << 8) + wp_log2_table[(val >> (bits - 9)) & 0xFF]; |
| } |
| |
| #define LEVEL_DECAY(a) ((a + 0x80) >> 8) |
| |
| // macros for manipulating median values |
| #define GET_MED(n) ((c->median[n] >> 4) + 1) |
| #define DEC_MED(n) c->median[n] -= ((c->median[n] + (128 >> n) - 2) / (128 >> n)) * 2 |
| #define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> n) ) / (128 >> n)) * 5 |
| |
| // macros for applying weight |
| #define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \ |
| if (samples && in) { \ |
| if ((samples ^ in) < 0) { \ |
| weight -= delta; \ |
| if (weight < -1024) \ |
| weight = -1024; \ |
| } else { \ |
| weight += delta; \ |
| if (weight > 1024) \ |
| weight = 1024; \ |
| } \ |
| } |
| |
| |
| static av_always_inline int get_tail(GetBitContext *gb, int k) |
| { |
| int p, e, res; |
| |
| if (k < 1) |
| return 0; |
| p = av_log2(k); |
| e = (1 << (p + 1)) - k - 1; |
| res = p ? get_bits(gb, p) : 0; |
| if (res >= e) |
| res = (res << 1) - e + get_bits1(gb); |
| return res; |
| } |
| |
| static void update_error_limit(WavpackFrameContext *ctx) |
| { |
| int i, br[2], sl[2]; |
| |
| for (i = 0; i <= ctx->stereo_in; i++) { |
| ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; |
| br[i] = ctx->ch[i].bitrate_acc >> 16; |
| sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); |
| } |
| if (ctx->stereo_in && ctx->hybrid_bitrate) { |
| int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; |
| if (balance > br[0]) { |
| br[1] = br[0] << 1; |
| br[0] = 0; |
| } else if (-balance > br[0]) { |
| br[0] <<= 1; |
| br[1] = 0; |
| } else { |
| br[1] = br[0] + balance; |
| br[0] = br[0] - balance; |
| } |
| } |
| for (i = 0; i <= ctx->stereo_in; i++) { |
| if (ctx->hybrid_bitrate) { |
| if (sl[i] - br[i] > -0x100) |
| ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); |
| else |
| ctx->ch[i].error_limit = 0; |
| } else { |
| ctx->ch[i].error_limit = wp_exp2(br[i]); |
| } |
| } |
| } |
| |
| static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, |
| int channel, int *last) |
| { |
| int t, t2; |
| int sign, base, add, ret; |
| WvChannel *c = &ctx->ch[channel]; |
| |
| *last = 0; |
| |
| if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) && |
| !ctx->zero && !ctx->one) { |
| if (ctx->zeroes) { |
| ctx->zeroes--; |
| if (ctx->zeroes) { |
| c->slow_level -= LEVEL_DECAY(c->slow_level); |
| return 0; |
| } |
| } else { |
| t = get_unary_0_33(gb); |
| if (t >= 2) { |
| if (get_bits_left(gb) < t - 1) |
| goto error; |
| t = get_bits(gb, t - 1) | (1 << (t-1)); |
| } else { |
| if (get_bits_left(gb) < 0) |
| goto error; |
| } |
| ctx->zeroes = t; |
| if (ctx->zeroes) { |
| memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median)); |
| memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median)); |
| c->slow_level -= LEVEL_DECAY(c->slow_level); |
| return 0; |
| } |
| } |
| } |
| |
| if (ctx->zero) { |
| t = 0; |
| ctx->zero = 0; |
| } else { |
| t = get_unary_0_33(gb); |
| if (get_bits_left(gb) < 0) |
| goto error; |
| if (t == 16) { |
| t2 = get_unary_0_33(gb); |
| if (t2 < 2) { |
| if (get_bits_left(gb) < 0) |
| goto error; |
| t += t2; |
| } else { |
| if (get_bits_left(gb) < t2 - 1) |
| goto error; |
| t += get_bits(gb, t2 - 1) | (1 << (t2 - 1)); |
| } |
| } |
| |
| if (ctx->one) { |
| ctx->one = t & 1; |
| t = (t >> 1) + 1; |
| } else { |
| ctx->one = t & 1; |
| t >>= 1; |
| } |
| ctx->zero = !ctx->one; |
| } |
| |
| if (ctx->hybrid && !channel) |
| update_error_limit(ctx); |
| |
| if (!t) { |
| base = 0; |
| add = GET_MED(0) - 1; |
| DEC_MED(0); |
| } else if (t == 1) { |
| base = GET_MED(0); |
| add = GET_MED(1) - 1; |
| INC_MED(0); |
| DEC_MED(1); |
| } else if (t == 2) { |
| base = GET_MED(0) + GET_MED(1); |
| add = GET_MED(2) - 1; |
| INC_MED(0); |
| INC_MED(1); |
| DEC_MED(2); |
| } else { |
| base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2); |
| add = GET_MED(2) - 1; |
| INC_MED(0); |
| INC_MED(1); |
| INC_MED(2); |
| } |
| if (!c->error_limit) { |
| ret = base + get_tail(gb, add); |
| if (get_bits_left(gb) <= 0) |
| goto error; |
| } else { |
| int mid = (base * 2 + add + 1) >> 1; |
| while (add > c->error_limit) { |
| if (get_bits_left(gb) <= 0) |
| goto error; |
| if (get_bits1(gb)) { |
| add -= (mid - base); |
| base = mid; |
| } else |
| add = mid - base - 1; |
| mid = (base * 2 + add + 1) >> 1; |
| } |
| ret = mid; |
| } |
| sign = get_bits1(gb); |
| if (ctx->hybrid_bitrate) |
| c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level); |
| return sign ? ~ret : ret; |
| |
| error: |
| *last = 1; |
| return 0; |
| } |
| |
| static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, |
| int S) |
| { |
| int bit; |
| |
| if (s->extra_bits){ |
| S <<= s->extra_bits; |
| |
| if (s->got_extra_bits && get_bits_left(&s->gb_extra_bits) >= s->extra_bits) { |
| S |= get_bits(&s->gb_extra_bits, s->extra_bits); |
| *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16); |
| } |
| } |
| |
| bit = (S & s->and) | s->or; |
| bit = ((S + bit) << s->shift) - bit; |
| |
| if (s->hybrid) |
| bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip); |
| |
| return bit << s->post_shift; |
| } |
| |
| static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S) |
| { |
| union { |
| float f; |
| uint32_t u; |
| } value; |
| |
| int sign; |
| int exp = s->float_max_exp; |
| |
| if (s->got_extra_bits) { |
| const int max_bits = 1 + 23 + 8 + 1; |
| const int left_bits = get_bits_left(&s->gb_extra_bits); |
| |
| if (left_bits + 8 * FF_INPUT_BUFFER_PADDING_SIZE < max_bits) |
| return 0.0; |
| } |
| |
| if (S) { |
| S <<= s->float_shift; |
| sign = S < 0; |
| if (sign) |
| S = -S; |
| if (S >= 0x1000000) { |
| if (s->got_extra_bits && get_bits1(&s->gb_extra_bits)) |
| S = get_bits(&s->gb_extra_bits, 23); |
| else |
| S = 0; |
| exp = 255; |
| } else if (exp) { |
| int shift = 23 - av_log2(S); |
| exp = s->float_max_exp; |
| if (exp <= shift) |
| shift = --exp; |
| exp -= shift; |
| |
| if (shift) { |
| S <<= shift; |
| if ((s->float_flag & WV_FLT_SHIFT_ONES) || |
| (s->got_extra_bits && (s->float_flag & WV_FLT_SHIFT_SAME) && |
| get_bits1(&s->gb_extra_bits))) { |
| S |= (1 << shift) - 1; |
| } else if (s->got_extra_bits && |
| (s->float_flag & WV_FLT_SHIFT_SENT)) { |
| S |= get_bits(&s->gb_extra_bits, shift); |
| } |
| } |
| } else { |
| exp = s->float_max_exp; |
| } |
| S &= 0x7fffff; |
| } else { |
| sign = 0; |
| exp = 0; |
| if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) { |
| if (get_bits1(&s->gb_extra_bits)) { |
| S = get_bits(&s->gb_extra_bits, 23); |
| if (s->float_max_exp >= 25) |
| exp = get_bits(&s->gb_extra_bits, 8); |
| sign = get_bits1(&s->gb_extra_bits); |
| } else { |
| if (s->float_flag & WV_FLT_ZERO_SIGN) |
| sign = get_bits1(&s->gb_extra_bits); |
| } |
| } |
| } |
| |
| *crc = *crc * 27 + S * 9 + exp * 3 + sign; |
| |
| value.u = (sign << 31) | (exp << 23) | S; |
| return value.f; |
| } |
| |
| static void wv_reset_saved_context(WavpackFrameContext *s) |
| { |
| s->pos = 0; |
| s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF; |
| } |
| |
| static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb, |
| void *dst, const int type) |
| { |
| int i, j, count = 0; |
| int last, t; |
| int A, B, L, L2, R, R2; |
| int pos = s->pos; |
| uint32_t crc = s->sc.crc; |
| uint32_t crc_extra_bits = s->extra_sc.crc; |
| int16_t *dst16 = dst; |
| int32_t *dst32 = dst; |
| float *dstfl = dst; |
| const int channel_pad = s->avctx->channels - 2; |
| |
| s->one = s->zero = s->zeroes = 0; |
| do { |
| L = wv_get_value(s, gb, 0, &last); |
| if (last) |
| break; |
| R = wv_get_value(s, gb, 1, &last); |
| if (last) |
| break; |
| for (i = 0; i < s->terms; i++) { |
| t = s->decorr[i].value; |
| if (t > 0) { |
| if (t > 8) { |
| if (t & 1) { |
| A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
| B = 2 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]; |
| } else { |
| A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
| B = (3 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1; |
| } |
| s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
| s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0]; |
| j = 0; |
| } else { |
| A = s->decorr[i].samplesA[pos]; |
| B = s->decorr[i].samplesB[pos]; |
| j = (pos + t) & 7; |
| } |
| if (type != AV_SAMPLE_FMT_S16) { |
| L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
| R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10); |
| } else { |
| L2 = L + ((s->decorr[i].weightA * A + 512) >> 10); |
| R2 = R + ((s->decorr[i].weightB * B + 512) >> 10); |
| } |
| if (A && L) s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
| if (B && R) s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta; |
| s->decorr[i].samplesA[j] = L = L2; |
| s->decorr[i].samplesB[j] = R = R2; |
| } else if (t == -1) { |
| if (type != AV_SAMPLE_FMT_S16) |
| L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10); |
| else |
| L2 = L + ((s->decorr[i].weightA * s->decorr[i].samplesA[0] + 512) >> 10); |
| UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L); |
| L = L2; |
| if (type != AV_SAMPLE_FMT_S16) |
| R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10); |
| else |
| R2 = R + ((s->decorr[i].weightB * L2 + 512) >> 10); |
| UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R); |
| R = R2; |
| s->decorr[i].samplesA[0] = R; |
| } else { |
| if (type != AV_SAMPLE_FMT_S16) |
| R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10); |
| else |
| R2 = R + ((s->decorr[i].weightB * s->decorr[i].samplesB[0] + 512) >> 10); |
| UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R); |
| R = R2; |
| |
| if (t == -3) { |
| R2 = s->decorr[i].samplesA[0]; |
| s->decorr[i].samplesA[0] = R; |
| } |
| |
| if (type != AV_SAMPLE_FMT_S16) |
| L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10); |
| else |
| L2 = L + ((s->decorr[i].weightA * R2 + 512) >> 10); |
| UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L); |
| L = L2; |
| s->decorr[i].samplesB[0] = L; |
| } |
| } |
| pos = (pos + 1) & 7; |
| if (s->joint) |
| L += (R -= (L >> 1)); |
| crc = (crc * 3 + L) * 3 + R; |
| |
| if (type == AV_SAMPLE_FMT_FLT) { |
| *dstfl++ = wv_get_value_float(s, &crc_extra_bits, L); |
| *dstfl++ = wv_get_value_float(s, &crc_extra_bits, R); |
| dstfl += channel_pad; |
| } else if (type == AV_SAMPLE_FMT_S32) { |
| *dst32++ = wv_get_value_integer(s, &crc_extra_bits, L); |
| *dst32++ = wv_get_value_integer(s, &crc_extra_bits, R); |
| dst32 += channel_pad; |
| } else { |
| *dst16++ = wv_get_value_integer(s, &crc_extra_bits, L); |
| *dst16++ = wv_get_value_integer(s, &crc_extra_bits, R); |
| dst16 += channel_pad; |
| } |
| count++; |
| } while (!last && count < s->samples); |
| |
| wv_reset_saved_context(s); |
| if (crc != s->CRC) { |
| av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); |
| return -1; |
| } |
| if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) { |
| av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); |
| return -1; |
| } |
| |
| return count * 2; |
| } |
| |
| static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, |
| void *dst, const int type) |
| { |
| int i, j, count = 0; |
| int last, t; |
| int A, S, T; |
| int pos = s->pos; |
| uint32_t crc = s->sc.crc; |
| uint32_t crc_extra_bits = s->extra_sc.crc; |
| int16_t *dst16 = dst; |
| int32_t *dst32 = dst; |
| float *dstfl = dst; |
| const int channel_stride = s->avctx->channels; |
| |
| s->one = s->zero = s->zeroes = 0; |
| do { |
| T = wv_get_value(s, gb, 0, &last); |
| S = 0; |
| if (last) |
| break; |
| for (i = 0; i < s->terms; i++) { |
| t = s->decorr[i].value; |
| if (t > 8) { |
| if (t & 1) |
| A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
| else |
| A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
| s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
| j = 0; |
| } else { |
| A = s->decorr[i].samplesA[pos]; |
| j = (pos + t) & 7; |
| } |
| if (type != AV_SAMPLE_FMT_S16) |
| S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
| else |
| S = T + ((s->decorr[i].weightA * A + 512) >> 10); |
| if (A && T) |
| s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
| s->decorr[i].samplesA[j] = T = S; |
| } |
| pos = (pos + 1) & 7; |
| crc = crc * 3 + S; |
| |
| if (type == AV_SAMPLE_FMT_FLT) { |
| *dstfl = wv_get_value_float(s, &crc_extra_bits, S); |
| dstfl += channel_stride; |
| } else if (type == AV_SAMPLE_FMT_S32) { |
| *dst32 = wv_get_value_integer(s, &crc_extra_bits, S); |
| dst32 += channel_stride; |
| } else { |
| *dst16 = wv_get_value_integer(s, &crc_extra_bits, S); |
| dst16 += channel_stride; |
| } |
| count++; |
| } while (!last && count < s->samples); |
| |
| wv_reset_saved_context(s); |
| if (crc != s->CRC) { |
| av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); |
| return -1; |
| } |
| if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) { |
| av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); |
| return -1; |
| } |
| |
| return count; |
| } |
| |
| static av_cold int wv_alloc_frame_context(WavpackContext *c) |
| { |
| |
| if (c->fdec_num == WV_MAX_FRAME_DECODERS) |
| return -1; |
| |
| c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec)); |
| if (!c->fdec[c->fdec_num]) |
| return -1; |
| c->fdec_num++; |
| c->fdec[c->fdec_num - 1]->avctx = c->avctx; |
| wv_reset_saved_context(c->fdec[c->fdec_num - 1]); |
| |
| return 0; |
| } |
| |
| static av_cold int wavpack_decode_init(AVCodecContext *avctx) |
| { |
| WavpackContext *s = avctx->priv_data; |
| |
| s->avctx = avctx; |
| if (avctx->bits_per_coded_sample <= 16) |
| avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| else |
| avctx->sample_fmt = AV_SAMPLE_FMT_S32; |
| if (avctx->channels <= 2 && !avctx->channel_layout) |
| avctx->channel_layout = (avctx->channels == 2) ? AV_CH_LAYOUT_STEREO : |
| AV_CH_LAYOUT_MONO; |
| |
| s->multichannel = avctx->channels > 2; |
| /* lavf demuxer does not provide extradata, Matroska stores 0x403 |
| there, use this to detect decoding mode for multichannel */ |
| s->mkv_mode = 0; |
| if (s->multichannel && avctx->extradata && avctx->extradata_size == 2) { |
| int ver = AV_RL16(avctx->extradata); |
| if (ver >= 0x402 && ver <= 0x410) |
| s->mkv_mode = 1; |
| } |
| |
| s->fdec_num = 0; |
| |
| avcodec_get_frame_defaults(&s->frame); |
| avctx->coded_frame = &s->frame; |
| |
| return 0; |
| } |
| |
| static av_cold int wavpack_decode_end(AVCodecContext *avctx) |
| { |
| WavpackContext *s = avctx->priv_data; |
| int i; |
| |
| for (i = 0; i < s->fdec_num; i++) |
| av_freep(&s->fdec[i]); |
| s->fdec_num = 0; |
| |
| return 0; |
| } |
| |
| static int wavpack_decode_block(AVCodecContext *avctx, int block_no, |
| void *data, int *got_frame_ptr, |
| const uint8_t *buf, int buf_size) |
| { |
| WavpackContext *wc = avctx->priv_data; |
| WavpackFrameContext *s; |
| void *samples = data; |
| int samplecount; |
| int got_terms = 0, got_weights = 0, got_samples = 0, |
| got_entropy = 0, got_bs = 0, got_float = 0, got_hybrid = 0; |
| const uint8_t *orig_buf = buf; |
| const uint8_t *buf_end = buf + buf_size; |
| int i, j, id, size, ssize, weights, t; |
| int bpp, chan, chmask, orig_bpp; |
| |
| if (buf_size == 0) { |
| *got_frame_ptr = 0; |
| return 0; |
| } |
| |
| if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| s = wc->fdec[block_no]; |
| if (!s) { |
| av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", block_no); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr)); |
| memset(s->ch, 0, sizeof(s->ch)); |
| s->extra_bits = 0; |
| s->and = s->or = s->shift = 0; |
| s->got_extra_bits = 0; |
| |
| if (!wc->mkv_mode) { |
| s->samples = AV_RL32(buf); buf += 4; |
| if (s->samples != wc->samples) |
| return AVERROR_INVALIDDATA; |
| |
| if (!s->samples) { |
| *got_frame_ptr = 0; |
| return 0; |
| } |
| } else { |
| s->samples = wc->samples; |
| } |
| s->frame_flags = AV_RL32(buf); buf += 4; |
| bpp = av_get_bytes_per_sample(avctx->sample_fmt); |
| samples = (uint8_t*)samples + bpp * wc->ch_offset; |
| orig_bpp = ((s->frame_flags & 0x03) + 1) << 3; |
| |
| s->stereo = !(s->frame_flags & WV_MONO); |
| s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo; |
| s->joint = s->frame_flags & WV_JOINT_STEREO; |
| s->hybrid = s->frame_flags & WV_HYBRID_MODE; |
| s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; |
| s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f); |
| s->hybrid_maxclip = (( 1LL << (orig_bpp - 1)) - 1); |
| s->hybrid_minclip = ((-1LL << (orig_bpp - 1))); |
| s->CRC = AV_RL32(buf); buf += 4; |
| if (wc->mkv_mode) |
| buf += 4; //skip block size; |
| |
| wc->ch_offset += 1 + s->stereo; |
| |
| // parse metadata blocks |
| while (buf < buf_end) { |
| id = *buf++; |
| size = *buf++; |
| if (id & WP_IDF_LONG) { |
| size |= (*buf++) << 8; |
| size |= (*buf++) << 16; |
| } |
| size <<= 1; // size is specified in words |
| ssize = size; |
| if (id & WP_IDF_ODD) |
| size--; |
| if (size < 0) { |
| av_log(avctx, AV_LOG_ERROR, "Got incorrect block %02X with size %i\n", id, size); |
| break; |
| } |
| if (buf + ssize > buf_end) { |
| av_log(avctx, AV_LOG_ERROR, "Block size %i is out of bounds\n", size); |
| break; |
| } |
| if (id & WP_IDF_IGNORE) { |
| buf += ssize; |
| continue; |
| } |
| switch (id & WP_IDF_MASK) { |
| case WP_ID_DECTERMS: |
| if (size > MAX_TERMS) { |
| av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n"); |
| s->terms = 0; |
| buf += ssize; |
| continue; |
| } |
| s->terms = size; |
| for (i = 0; i < s->terms; i++) { |
| s->decorr[s->terms - i - 1].value = (*buf & 0x1F) - 5; |
| s->decorr[s->terms - i - 1].delta = *buf >> 5; |
| buf++; |
| } |
| got_terms = 1; |
| break; |
| case WP_ID_DECWEIGHTS: |
| if (!got_terms) { |
| av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
| continue; |
| } |
| weights = size >> s->stereo_in; |
| if (weights > MAX_TERMS || weights > s->terms) { |
| av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n"); |
| buf += ssize; |
| continue; |
| } |
| for (i = 0; i < weights; i++) { |
| t = (int8_t)(*buf++); |
| s->decorr[s->terms - i - 1].weightA = t << 3; |
| if (s->decorr[s->terms - i - 1].weightA > 0) |
| s->decorr[s->terms - i - 1].weightA += |
| (s->decorr[s->terms - i - 1].weightA + 64) >> 7; |
| if (s->stereo_in) { |
| t = (int8_t)(*buf++); |
| s->decorr[s->terms - i - 1].weightB = t << 3; |
| if (s->decorr[s->terms - i - 1].weightB > 0) |
| s->decorr[s->terms - i - 1].weightB += |
| (s->decorr[s->terms - i - 1].weightB + 64) >> 7; |
| } |
| } |
| got_weights = 1; |
| break; |
| case WP_ID_DECSAMPLES: |
| if (!got_terms) { |
| av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
| continue; |
| } |
| t = 0; |
| for (i = s->terms - 1; (i >= 0) && (t < size); i--) { |
| if (s->decorr[i].value > 8) { |
| s->decorr[i].samplesA[0] = wp_exp2(AV_RL16(buf)); buf += 2; |
| s->decorr[i].samplesA[1] = wp_exp2(AV_RL16(buf)); buf += 2; |
| if (s->stereo_in) { |
| s->decorr[i].samplesB[0] = wp_exp2(AV_RL16(buf)); buf += 2; |
| s->decorr[i].samplesB[1] = wp_exp2(AV_RL16(buf)); buf += 2; |
| t += 4; |
| } |
| t += 4; |
| } else if (s->decorr[i].value < 0) { |
| s->decorr[i].samplesA[0] = wp_exp2(AV_RL16(buf)); buf += 2; |
| s->decorr[i].samplesB[0] = wp_exp2(AV_RL16(buf)); buf += 2; |
| t += 4; |
| } else { |
| for (j = 0; j < s->decorr[i].value; j++) { |
| s->decorr[i].samplesA[j] = wp_exp2(AV_RL16(buf)); buf += 2; |
| if (s->stereo_in) { |
| s->decorr[i].samplesB[j] = wp_exp2(AV_RL16(buf)); buf += 2; |
| } |
| } |
| t += s->decorr[i].value * 2 * (s->stereo_in + 1); |
| } |
| } |
| got_samples = 1; |
| break; |
| case WP_ID_ENTROPY: |
| if (size != 6 * (s->stereo_in + 1)) { |
| av_log(avctx, AV_LOG_ERROR, "Entropy vars size should be %i, " |
| "got %i", 6 * (s->stereo_in + 1), size); |
| buf += ssize; |
| continue; |
| } |
| for (j = 0; j <= s->stereo_in; j++) { |
| for (i = 0; i < 3; i++) { |
| s->ch[j].median[i] = wp_exp2(AV_RL16(buf)); |
| buf += 2; |
| } |
| } |
| got_entropy = 1; |
| break; |
| case WP_ID_HYBRID: |
| if (s->hybrid_bitrate) { |
| for (i = 0; i <= s->stereo_in; i++) { |
| s->ch[i].slow_level = wp_exp2(AV_RL16(buf)); |
| buf += 2; |
| size -= 2; |
| } |
| } |
| for (i = 0; i < (s->stereo_in + 1); i++) { |
| s->ch[i].bitrate_acc = AV_RL16(buf) << 16; |
| buf += 2; |
| size -= 2; |
| } |
| if (size > 0) { |
| for (i = 0; i < (s->stereo_in + 1); i++) { |
| s->ch[i].bitrate_delta = wp_exp2((int16_t)AV_RL16(buf)); |
| buf += 2; |
| } |
| } else { |
| for (i = 0; i < (s->stereo_in + 1); i++) |
| s->ch[i].bitrate_delta = 0; |
| } |
| got_hybrid = 1; |
| break; |
| case WP_ID_INT32INFO: |
| if (size != 4) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid INT32INFO, size = %i, sent_bits = %i\n", size, *buf); |
| buf += ssize; |
| continue; |
| } |
| if (buf[0]) |
| s->extra_bits = buf[0]; |
| else if (buf[1]) |
| s->shift = buf[1]; |
| else if (buf[2]){ |
| s->and = s->or = 1; |
| s->shift = buf[2]; |
| } else if(buf[3]) { |
| s->and = 1; |
| s->shift = buf[3]; |
| } |
| /* original WavPack decoder forces 32-bit lossy sound to be treated |
| * as 24-bit one in order to have proper clipping |
| */ |
| if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) { |
| s->post_shift += 8; |
| s->shift -= 8; |
| s->hybrid_maxclip >>= 8; |
| s->hybrid_minclip >>= 8; |
| } |
| buf += 4; |
| break; |
| case WP_ID_FLOATINFO: |
| if (size != 4) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid FLOATINFO, size = %i\n", size); |
| buf += ssize; |
| continue; |
| } |
| s->float_flag = buf[0]; |
| s->float_shift = buf[1]; |
| s->float_max_exp = buf[2]; |
| buf += 4; |
| got_float = 1; |
| break; |
| case WP_ID_DATA: |
| s->sc.offset = buf - orig_buf; |
| s->sc.size = size * 8; |
| init_get_bits(&s->gb, buf, size * 8); |
| s->data_size = size * 8; |
| buf += size; |
| got_bs = 1; |
| break; |
| case WP_ID_EXTRABITS: |
| if (size <= 4) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n", |
| size); |
| buf += size; |
| continue; |
| } |
| s->extra_sc.offset = buf - orig_buf; |
| s->extra_sc.size = size * 8; |
| init_get_bits(&s->gb_extra_bits, buf, size * 8); |
| s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32); |
| buf += size; |
| s->got_extra_bits = 1; |
| break; |
| case WP_ID_CHANINFO: |
| if (size <= 1) { |
| av_log(avctx, AV_LOG_ERROR, "Insufficient channel information\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| chan = *buf++; |
| switch (size - 2) { |
| case 0: chmask = *buf; break; |
| case 1: chmask = AV_RL16(buf); break; |
| case 2: chmask = AV_RL24(buf); break; |
| case 3: chmask = AV_RL32(buf); break; |
| case 5: |
| chan |= (buf[1] & 0xF) << 8; |
| chmask = AV_RL24(buf + 2); |
| break; |
| default: |
| av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n", |
| size); |
| chan = avctx->channels; |
| chmask = avctx->channel_layout; |
| } |
| if (chan != avctx->channels) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Block reports total %d channels, " |
| "decoder believes it's %d channels\n", |
| chan, avctx->channels); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!avctx->channel_layout) |
| avctx->channel_layout = chmask; |
| buf += size - 1; |
| break; |
| default: |
| buf += size; |
| } |
| if (id & WP_IDF_ODD) |
| buf++; |
| } |
| |
| if (!got_terms) { |
| av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!got_weights) { |
| av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!got_samples) { |
| av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!got_entropy) { |
| av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->hybrid && !got_hybrid) { |
| av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!got_bs) { |
| av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLT) { |
| av_log(avctx, AV_LOG_ERROR, "Float information not found\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLT) { |
| const int size = get_bits_left(&s->gb_extra_bits); |
| const int wanted = s->samples * s->extra_bits << s->stereo_in; |
| if (size < wanted) { |
| av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n"); |
| s->got_extra_bits = 0; |
| } |
| } |
| |
| if (s->stereo_in) { |
| if (avctx->sample_fmt == AV_SAMPLE_FMT_S16) |
| samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_S16); |
| else if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) |
| samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_S32); |
| else |
| samplecount = wv_unpack_stereo(s, &s->gb, samples, AV_SAMPLE_FMT_FLT); |
| |
| if (samplecount < 0) |
| return samplecount; |
| |
| samplecount >>= 1; |
| } else { |
| const int channel_stride = avctx->channels; |
| |
| if (avctx->sample_fmt == AV_SAMPLE_FMT_S16) |
| samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_S16); |
| else if (avctx->sample_fmt == AV_SAMPLE_FMT_S32) |
| samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_S32); |
| else |
| samplecount = wv_unpack_mono(s, &s->gb, samples, AV_SAMPLE_FMT_FLT); |
| |
| if (samplecount < 0) |
| return samplecount; |
| |
| if (s->stereo && avctx->sample_fmt == AV_SAMPLE_FMT_S16) { |
| int16_t *dst = (int16_t*)samples + 1; |
| int16_t *src = (int16_t*)samples; |
| int cnt = samplecount; |
| while (cnt--) { |
| *dst = *src; |
| src += channel_stride; |
| dst += channel_stride; |
| } |
| } else if (s->stereo && avctx->sample_fmt == AV_SAMPLE_FMT_S32) { |
| int32_t *dst = (int32_t*)samples + 1; |
| int32_t *src = (int32_t*)samples; |
| int cnt = samplecount; |
| while (cnt--) { |
| *dst = *src; |
| src += channel_stride; |
| dst += channel_stride; |
| } |
| } else if (s->stereo) { |
| float *dst = (float*)samples + 1; |
| float *src = (float*)samples; |
| int cnt = samplecount; |
| while (cnt--) { |
| *dst = *src; |
| src += channel_stride; |
| dst += channel_stride; |
| } |
| } |
| } |
| |
| *got_frame_ptr = 1; |
| |
| return samplecount * bpp; |
| } |
| |
| static void wavpack_decode_flush(AVCodecContext *avctx) |
| { |
| WavpackContext *s = avctx->priv_data; |
| int i; |
| |
| for (i = 0; i < s->fdec_num; i++) |
| wv_reset_saved_context(s->fdec[i]); |
| } |
| |
| static int wavpack_decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame_ptr, AVPacket *avpkt) |
| { |
| WavpackContext *s = avctx->priv_data; |
| const uint8_t *buf = avpkt->data; |
| int buf_size = avpkt->size; |
| int frame_size, ret, frame_flags; |
| int samplecount = 0; |
| |
| if (avpkt->size < 12 + s->multichannel * 4) |
| return AVERROR_INVALIDDATA; |
| |
| s->block = 0; |
| s->ch_offset = 0; |
| |
| /* determine number of samples */ |
| if (s->mkv_mode) { |
| s->samples = AV_RL32(buf); buf += 4; |
| frame_flags = AV_RL32(buf); |
| } else { |
| if (s->multichannel) { |
| s->samples = AV_RL32(buf + 4); |
| frame_flags = AV_RL32(buf + 8); |
| } else { |
| s->samples = AV_RL32(buf); |
| frame_flags = AV_RL32(buf + 4); |
| } |
| } |
| if (s->samples <= 0) { |
| av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n", |
| s->samples); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (frame_flags & 0x80) { |
| avctx->sample_fmt = AV_SAMPLE_FMT_FLT; |
| } else if ((frame_flags & 0x03) <= 1) { |
| avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| } else { |
| avctx->sample_fmt = AV_SAMPLE_FMT_S32; |
| } |
| |
| /* get output buffer */ |
| s->frame.nb_samples = s->samples; |
| if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) { |
| av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); |
| return ret; |
| } |
| |
| while (buf_size > 0) { |
| if (!s->multichannel) { |
| frame_size = buf_size; |
| } else { |
| if (!s->mkv_mode) { |
| frame_size = AV_RL32(buf) - 12; buf += 4; buf_size -= 4; |
| } else { |
| if (buf_size < 12) //MKV files can have zero flags after last block |
| break; |
| frame_size = AV_RL32(buf + 8) + 12; |
| } |
| } |
| if (frame_size < 0 || frame_size > buf_size) { |
| av_log(avctx, AV_LOG_ERROR, "Block %d has invalid size (size %d " |
| "vs. %d bytes left)\n", s->block, frame_size, buf_size); |
| wavpack_decode_flush(avctx); |
| return AVERROR_INVALIDDATA; |
| } |
| if ((samplecount = wavpack_decode_block(avctx, s->block, |
| s->frame.data[0], got_frame_ptr, |
| buf, frame_size)) < 0) { |
| wavpack_decode_flush(avctx); |
| return samplecount; |
| } |
| s->block++; |
| buf += frame_size; buf_size -= frame_size; |
| } |
| |
| if (*got_frame_ptr) |
| *(AVFrame *)data = s->frame; |
| |
| return avpkt->size; |
| } |
| |
| AVCodec ff_wavpack_decoder = { |
| .name = "wavpack", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .id = CODEC_ID_WAVPACK, |
| .priv_data_size = sizeof(WavpackContext), |
| .init = wavpack_decode_init, |
| .close = wavpack_decode_end, |
| .decode = wavpack_decode_frame, |
| .flush = wavpack_decode_flush, |
| .capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1, |
| .long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
| }; |
