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1253 lines
41 KiB
1253 lines
41 KiB
/* |
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* WavPack lossless audio decoder |
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* Copyright (c) 2006,2011 Konstantin Shishkov |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* 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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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; 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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*/ |
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|
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#define BITSTREAM_READER_LE |
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|
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#include "libavutil/audioconvert.h" |
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#include "avcodec.h" |
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#include "get_bits.h" |
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#include "unary.h" |
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|
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/** |
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* @file |
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* WavPack lossless audio decoder |
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*/ |
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|
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#define WV_MONO 0x00000004 |
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#define WV_JOINT_STEREO 0x00000010 |
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#define WV_FALSE_STEREO 0x40000000 |
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|
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#define WV_HYBRID_MODE 0x00000008 |
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#define WV_HYBRID_SHAPE 0x00000008 |
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#define WV_HYBRID_BITRATE 0x00000200 |
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#define WV_HYBRID_BALANCE 0x00000400 |
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|
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#define WV_FLT_SHIFT_ONES 0x01 |
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#define WV_FLT_SHIFT_SAME 0x02 |
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#define WV_FLT_SHIFT_SENT 0x04 |
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#define WV_FLT_ZERO_SENT 0x08 |
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#define WV_FLT_ZERO_SIGN 0x10 |
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|
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enum WP_ID_Flags { |
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WP_IDF_MASK = 0x1F, |
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WP_IDF_IGNORE = 0x20, |
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WP_IDF_ODD = 0x40, |
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WP_IDF_LONG = 0x80 |
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}; |
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|
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enum WP_ID { |
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WP_ID_DUMMY = 0, |
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WP_ID_ENCINFO, |
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WP_ID_DECTERMS, |
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WP_ID_DECWEIGHTS, |
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WP_ID_DECSAMPLES, |
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WP_ID_ENTROPY, |
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WP_ID_HYBRID, |
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WP_ID_SHAPING, |
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WP_ID_FLOATINFO, |
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WP_ID_INT32INFO, |
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WP_ID_DATA, |
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WP_ID_CORR, |
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WP_ID_EXTRABITS, |
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WP_ID_CHANINFO |
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}; |
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|
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typedef struct SavedContext { |
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int offset; |
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int size; |
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int bits_used; |
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uint32_t crc; |
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} SavedContext; |
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|
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#define MAX_TERMS 16 |
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|
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typedef struct Decorr { |
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int delta; |
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int value; |
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int weightA; |
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int weightB; |
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int samplesA[8]; |
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int samplesB[8]; |
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} Decorr; |
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|
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typedef struct WvChannel { |
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int median[3]; |
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int slow_level, error_limit; |
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int bitrate_acc, bitrate_delta; |
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} WvChannel; |
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|
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typedef struct WavpackFrameContext { |
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AVCodecContext *avctx; |
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int frame_flags; |
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int stereo, stereo_in; |
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int joint; |
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uint32_t CRC; |
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GetBitContext gb; |
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int got_extra_bits; |
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uint32_t crc_extra_bits; |
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GetBitContext gb_extra_bits; |
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int data_size; // in bits |
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int samples; |
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int terms; |
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Decorr decorr[MAX_TERMS]; |
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int zero, one, zeroes; |
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int extra_bits; |
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int and, or, shift; |
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int post_shift; |
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int hybrid, hybrid_bitrate; |
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int hybrid_maxclip, hybrid_minclip; |
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int float_flag; |
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int float_shift; |
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int float_max_exp; |
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WvChannel ch[2]; |
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int pos; |
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SavedContext sc, extra_sc; |
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} WavpackFrameContext; |
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|
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#define WV_MAX_FRAME_DECODERS 14 |
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|
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typedef struct WavpackContext { |
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AVCodecContext *avctx; |
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AVFrame frame; |
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|
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WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS]; |
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int fdec_num; |
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|
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int multichannel; |
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int mkv_mode; |
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int block; |
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int samples; |
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int ch_offset; |
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} WavpackContext; |
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|
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// exponent table copied from WavPack source |
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static const uint8_t wp_exp2_table [256] = { |
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0x00, 0x01, 0x01, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x08, 0x09, 0x0a, 0x0b, |
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0x0b, 0x0c, 0x0d, 0x0e, 0x0e, 0x0f, 0x10, 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x15, 0x16, 0x16, |
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0x17, 0x18, 0x19, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1d, 0x1e, 0x1f, 0x20, 0x20, 0x21, 0x22, 0x23, |
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0x24, 0x24, 0x25, 0x26, 0x27, 0x28, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, |
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3a, 0x3b, 0x3c, 0x3d, |
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0x3e, 0x3f, 0x40, 0x41, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x48, 0x49, 0x4a, 0x4b, |
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0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, |
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0x5b, 0x5c, 0x5d, 0x5e, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
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0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
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0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8a, |
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0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, |
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0x9c, 0x9d, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, |
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0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, |
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0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc8, 0xc9, 0xca, 0xcb, 0xcd, 0xce, 0xcf, 0xd0, 0xd2, 0xd3, 0xd4, |
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0xd6, 0xd7, 0xd8, 0xd9, 0xdb, 0xdc, 0xdd, 0xde, 0xe0, 0xe1, 0xe2, 0xe4, 0xe5, 0xe6, 0xe8, 0xe9, |
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0xea, 0xec, 0xed, 0xee, 0xf0, 0xf1, 0xf2, 0xf4, 0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfc, 0xfd, 0xff |
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}; |
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|
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static const uint8_t wp_log2_table [] = { |
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0x00, 0x01, 0x03, 0x04, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x10, 0x11, 0x12, 0x14, 0x15, |
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0x16, 0x18, 0x19, 0x1a, 0x1c, 0x1d, 0x1e, 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2a, |
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0x2c, 0x2d, 0x2e, 0x2f, 0x31, 0x32, 0x33, 0x34, 0x36, 0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3d, 0x3e, |
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0x3f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4d, 0x4e, 0x4f, 0x50, 0x51, |
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0x52, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, |
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0x64, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x74, 0x75, |
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0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, |
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0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, |
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0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, |
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0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb2, |
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0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc0, |
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0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcb, 0xcc, 0xcd, 0xce, |
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0xcf, 0xd0, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd8, 0xd9, 0xda, 0xdb, |
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0xdc, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe4, 0xe5, 0xe6, 0xe7, 0xe7, |
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0xe8, 0xe9, 0xea, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xee, 0xef, 0xf0, 0xf1, 0xf1, 0xf2, 0xf3, 0xf4, |
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0xf4, 0xf5, 0xf6, 0xf7, 0xf7, 0xf8, 0xf9, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xff, 0xff |
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}; |
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|
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static av_always_inline int wp_exp2(int16_t val) |
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{ |
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int res, neg = 0; |
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|
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if (val < 0) { |
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val = -val; |
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neg = 1; |
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} |
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|
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res = wp_exp2_table[val & 0xFF] | 0x100; |
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val >>= 8; |
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res = (val > 9) ? (res << (val - 9)) : (res >> (9 - val)); |
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return neg ? -res : res; |
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} |
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|
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static av_always_inline int wp_log2(int32_t val) |
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{ |
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int bits; |
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|
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if (!val) |
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return 0; |
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if (val == 1) |
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return 256; |
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val += val >> 9; |
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bits = av_log2(val) + 1; |
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if (bits < 9) |
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return (bits << 8) + wp_log2_table[(val << (9 - bits)) & 0xFF]; |
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else |
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return (bits << 8) + wp_log2_table[(val >> (bits - 9)) & 0xFF]; |
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} |
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|
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#define LEVEL_DECAY(a) ((a + 0x80) >> 8) |
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|
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// macros for manipulating median values |
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#define GET_MED(n) ((c->median[n] >> 4) + 1) |
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#define DEC_MED(n) c->median[n] -= ((c->median[n] + (128 >> n) - 2) / (128 >> n)) * 2 |
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#define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> n) ) / (128 >> n)) * 5 |
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|
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// macros for applying weight |
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#define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \ |
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if (samples && in) { \ |
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if ((samples ^ in) < 0) { \ |
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weight -= delta; \ |
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if (weight < -1024) \ |
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weight = -1024; \ |
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} else { \ |
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weight += delta; \ |
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if (weight > 1024) \ |
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weight = 1024; \ |
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} \ |
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} |
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|
|
|
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static av_always_inline int get_tail(GetBitContext *gb, int k) |
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{ |
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int p, e, res; |
|
|
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if (k < 1) |
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return 0; |
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p = av_log2(k); |
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e = (1 << (p + 1)) - k - 1; |
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res = p ? get_bits(gb, p) : 0; |
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if (res >= e) |
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res = (res << 1) - e + get_bits1(gb); |
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return res; |
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} |
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|
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static void update_error_limit(WavpackFrameContext *ctx) |
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{ |
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int i, br[2], sl[2]; |
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|
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for (i = 0; i <= ctx->stereo_in; i++) { |
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ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; |
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br[i] = ctx->ch[i].bitrate_acc >> 16; |
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sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); |
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} |
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if (ctx->stereo_in && ctx->hybrid_bitrate) { |
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int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; |
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if (balance > br[0]) { |
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br[1] = br[0] << 1; |
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br[0] = 0; |
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} else if (-balance > br[0]) { |
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br[0] <<= 1; |
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br[1] = 0; |
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} else { |
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br[1] = br[0] + balance; |
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br[0] = br[0] - balance; |
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} |
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} |
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for (i = 0; i <= ctx->stereo_in; i++) { |
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if (ctx->hybrid_bitrate) { |
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if (sl[i] - br[i] > -0x100) |
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ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); |
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else |
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ctx->ch[i].error_limit = 0; |
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} else { |
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ctx->ch[i].error_limit = wp_exp2(br[i]); |
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} |
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} |
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} |
|
|
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static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, |
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int channel, int *last) |
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{ |
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int t, t2; |
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int sign, base, add, ret; |
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WvChannel *c = &ctx->ch[channel]; |
|
|
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*last = 0; |
|
|
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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) { |
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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 { |
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if (get_bits_left(gb) < 0) |
|
goto error; |
|
} |
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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)); |
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c->slow_level -= LEVEL_DECAY(c->slow_level); |
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return 0; |
|
} |
|
} |
|
} |
|
|
|
if (ctx->zero) { |
|
t = 0; |
|
ctx->zero = 0; |
|
} else { |
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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) { |
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if (get_bits_left(gb) < 0) |
|
goto error; |
|
t += t2; |
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} else { |
|
if (get_bits_left(gb) < t2 - 1) |
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goto error; |
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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 -1; |
|
} |
|
|
|
s = wc->fdec[block_no]; |
|
if (!s) { |
|
av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", block_no); |
|
return -1; |
|
} |
|
|
|
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) { |
|
*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->post_shift; |
|
s->hybrid_minclip = ((-1LL << (orig_bpp - 1))) >> s->post_shift; |
|
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 -1; |
|
} |
|
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 -1; |
|
} |
|
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 -1; |
|
} |
|
if (!got_weights) { |
|
av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n"); |
|
return -1; |
|
} |
|
if (!got_samples) { |
|
av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n"); |
|
return -1; |
|
} |
|
if (!got_entropy) { |
|
av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); |
|
return -1; |
|
} |
|
if (s->hybrid && !got_hybrid) { |
|
av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); |
|
return -1; |
|
} |
|
if (!got_bs) { |
|
av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); |
|
return -1; |
|
} |
|
if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLT) { |
|
av_log(avctx, AV_LOG_ERROR, "Float information not found\n"); |
|
return -1; |
|
} |
|
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 -1; |
|
|
|
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 -1; |
|
|
|
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; |
|
|
|
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(EINVAL); |
|
} |
|
|
|
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 -1; |
|
} |
|
if ((samplecount = wavpack_decode_block(avctx, s->block, |
|
s->frame.data[0], got_frame_ptr, |
|
buf, frame_size)) < 0) { |
|
wavpack_decode_flush(avctx); |
|
return -1; |
|
} |
|
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"), |
|
};
|
|
|