mirror of https://git.ffmpeg.org/ffmpeg.git
1243 lines
41 KiB
C
1243 lines
41 KiB
C
/*
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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 Libav.
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*
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* Libav 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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* Libav 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 Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define BITSTREAM_READER_LE
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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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* @file
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* WavPack lossless audio decoder
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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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#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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#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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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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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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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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#define MAX_TERMS 16
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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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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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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, hybrid_maxclip;
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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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#define WV_MAX_FRAME_DECODERS 14
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typedef struct WavpackContext {
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AVCodecContext *avctx;
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AVFrame frame;
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WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS];
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int fdec_num;
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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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// 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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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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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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if (val < 0) {
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val = -val;
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neg = 1;
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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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static av_always_inline int wp_log2(int32_t val)
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{
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int bits;
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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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#define LEVEL_DECAY(a) ((a + 0x80) >> 8)
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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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// 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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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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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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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) &&
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!ctx->zero && !ctx->one) {
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if (ctx->zeroes) {
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ctx->zeroes--;
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if (ctx->zeroes) {
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c->slow_level -= LEVEL_DECAY(c->slow_level);
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return 0;
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}
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} else {
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t = get_unary_0_33(gb);
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if (t >= 2) {
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if (get_bits_left(gb) < t - 1)
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goto error;
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t = get_bits(gb, t - 1) | (1 << (t-1));
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} else {
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if (get_bits_left(gb) < 0)
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goto error;
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}
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ctx->zeroes = t;
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if (ctx->zeroes) {
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memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median));
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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;
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}
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}
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}
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|
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if (ctx->zero) {
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t = 0;
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ctx->zero = 0;
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} else {
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t = get_unary_0_33(gb);
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if (get_bits_left(gb) < 0)
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goto error;
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if (t == 16) {
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t2 = get_unary_0_33(gb);
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if (t2 < 2) {
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if (get_bits_left(gb) < 0)
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goto error;
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t += t2;
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} else {
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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));
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}
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}
|
|
|
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if (ctx->one) {
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ctx->one = t & 1;
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t = (t >> 1) + 1;
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} else {
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ctx->one = t & 1;
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t >>= 1;
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}
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ctx->zero = !ctx->one;
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}
|
|
|
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if (ctx->hybrid && !channel)
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update_error_limit(ctx);
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|
|
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if (!t) {
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base = 0;
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add = GET_MED(0) - 1;
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DEC_MED(0);
|
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} else if (t == 1) {
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base = GET_MED(0);
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add = GET_MED(1) - 1;
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INC_MED(0);
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DEC_MED(1);
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} else if (t == 2) {
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base = GET_MED(0) + GET_MED(1);
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|
add = GET_MED(2) - 1;
|
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INC_MED(0);
|
|
INC_MED(1);
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DEC_MED(2);
|
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} else {
|
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base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2);
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add = GET_MED(2) - 1;
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INC_MED(0);
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INC_MED(1);
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INC_MED(2);
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}
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if (!c->error_limit) {
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ret = base + get_tail(gb, add);
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if (get_bits_left(gb) <= 0)
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goto error;
|
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} else {
|
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int mid = (base * 2 + add + 1) >> 1;
|
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while (add > c->error_limit) {
|
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if (get_bits_left(gb) <= 0)
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goto error;
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if (get_bits1(gb)) {
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add -= (mid - base);
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base = mid;
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} else
|
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add = mid - base - 1;
|
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mid = (base * 2 + add + 1) >> 1;
|
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}
|
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ret = mid;
|
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}
|
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sign = get_bits1(gb);
|
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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) << s->post_shift;
|
|
|
|
if (s->hybrid)
|
|
bit = av_clip(bit, -s->hybrid_maxclip - 1, s->hybrid_maxclip);
|
|
|
|
return bit;
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
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->hybrid_maxclip = (1LL << ((((s->frame_flags & 0x03) + 1) << 3) - 1)) - 1;
|
|
s->post_shift = 8 * (bpp - 1 - (s->frame_flags & 0x03)) +
|
|
((s->frame_flags >> 13) & 0x1f);
|
|
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];
|
|
}
|
|
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"),
|
|
};
|