545 files changed, 230976 insertions, 0 deletions
diff --git a/audio_codec/libfaad/bits.h b/audio_codec/libfaad/bits.h new file mode 100644 index 0000000..b63dd23 --- a/dev/null +++ b/audio_codec/libfaad/bits.h @@ -0,0 +1,446 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +** +** Any non-GPL usage of this software or parts of this software is strictly +** forbidden. +** +** The "appropriate copyright message" mentioned in section 2c of the GPLv2 +** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com" +** +** Commercial non-GPL licensing of this software is possible. +** For more info contact Nero AG through Mpeg4AAClicense@nero.com. +** +** $Id: bits.h,v 1.45 2007/11/01 12:33:29 menno Exp $ +**/ + +#ifndef __BITS_H__ +#define __BITS_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "analysis.h" +#ifdef ANALYSIS +#include <stdio.h> +#endif + +#define BYTE_NUMBIT 8 +#define BYTE_NUMBIT_LD 3 + //#define bit2byte(a) ((a+7)/BYTE_NUMBIT) +#define bit2byte(a) ((a+7)>>BYTE_NUMBIT_LD) + + typedef struct _bitfile { + /* bit input */ + uint32_t bufa; + uint32_t bufb; + uint32_t bits_left; + uint32_t buffer_size; /* size of the buffer in bytes */ + uint32_t bytes_left; + uint8_t error; + uint32_t *tail; + uint32_t *start; + const void *buffer; + } bitfile; + + +#if 0 + static uint32_t const bitmask[] = { + 0x0, 0x1, 0x3, 0x7, 0xF, 0x1F, 0x3F, 0x7F, 0xFF, 0x1FF, + 0x3FF, 0x7FF, 0xFFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF, + 0x1FFFF, 0x3FFFF, 0x7FFFF, 0xFFFFF, 0x1FFFFF, 0x3FFFFF, + 0x7FFFFF, 0xFFFFFF, 0x1FFFFFF, 0x3FFFFFF, 0x7FFFFFF, + 0xFFFFFFF, 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF + /* added bitmask 32, correct?!?!?! */ + , 0xFFFFFFFF + }; +#endif + + void faad_initbits(bitfile *ld, const void *buffer, const uint32_t buffer_size); + void faad_endbits(bitfile *ld); + void faad_initbits_rev(bitfile *ld, void *buffer, + uint32_t bits_in_buffer); + uint8_t faad_byte_align(bitfile *ld); + uint32_t faad_get_processed_bits(bitfile *ld); + void faad_flushbits_ex(bitfile *ld, uint32_t bits); + void faad_rewindbits(bitfile *ld); + void faad_resetbits(bitfile *ld, int bits); + uint8_t *faad_getbitbuffer(bitfile *ld, uint32_t bits + DEBUGDEC); +#ifdef DRM + void *faad_origbitbuffer(bitfile *ld); + uint32_t faad_origbitbuffer_size(bitfile *ld); +#endif + + /* circumvent memory alignment errors on ARM */ + static INLINE uint32_t getdword(void *mem) + { + uint32_t tmp; +#ifndef ARCH_IS_BIG_ENDIAN + ((uint8_t*)&tmp)[0] = ((uint8_t*)mem)[3]; + ((uint8_t*)&tmp)[1] = ((uint8_t*)mem)[2]; + ((uint8_t*)&tmp)[2] = ((uint8_t*)mem)[1]; + ((uint8_t*)&tmp)[3] = ((uint8_t*)mem)[0]; +#else + ((uint8_t*)&tmp)[0] = ((uint8_t*)mem)[0]; + ((uint8_t*)&tmp)[1] = ((uint8_t*)mem)[1]; + ((uint8_t*)&tmp)[2] = ((uint8_t*)mem)[2]; + ((uint8_t*)&tmp)[3] = ((uint8_t*)mem)[3]; +#endif + + return tmp; + } + + /* reads only n bytes from the stream instead of the standard 4 */ + static /*INLINE*/ uint32_t getdword_n(void *mem, int n) + { + uint32_t tmp = 0; +#ifndef ARCH_IS_BIG_ENDIAN + switch (n) { + case 3: + ((uint8_t*)&tmp)[1] = ((uint8_t*)mem)[2]; + case 2: + ((uint8_t*)&tmp)[2] = ((uint8_t*)mem)[1]; + case 1: + ((uint8_t*)&tmp)[3] = ((uint8_t*)mem)[0]; + default: + break; + } +#else + switch (n) { + case 3: + ((uint8_t*)&tmp)[2] = ((uint8_t*)mem)[2]; + case 2: + ((uint8_t*)&tmp)[1] = ((uint8_t*)mem)[1]; + case 1: + ((uint8_t*)&tmp)[0] = ((uint8_t*)mem)[0]; + default: + break; + } +#endif + + return tmp; + } + + static INLINE uint32_t faad_showbits(bitfile *ld, uint32_t bits) + { + if (bits <= ld->bits_left) { + //return (ld->bufa >> (ld->bits_left - bits)) & bitmask[bits]; + return (ld->bufa << (32 - ld->bits_left)) >> (32 - bits); + } + + bits -= ld->bits_left; + //return ((ld->bufa & bitmask[ld->bits_left]) << bits) | (ld->bufb >> (32 - bits)); + return ((ld->bufa & ((1 << ld->bits_left) - 1)) << bits) | (ld->bufb >> (32 - bits)); + } + + static INLINE void faad_flushbits(bitfile *ld, uint32_t bits) + { + /* do nothing if error */ + if (ld->error != 0) { + return; + } + + if (bits < ld->bits_left) { + ld->bits_left -= bits; + } else { + faad_flushbits_ex(ld, bits); + } + } + + /* return next n bits (right adjusted) */ + static /*INLINE*/ uint32_t faad_getbits(bitfile *ld, uint32_t n DEBUGDEC) + { + uint32_t ret; + + if (n == 0) { + return 0; + } + + ret = faad_showbits(ld, n); + faad_flushbits(ld, n); + +#ifdef ANALYSIS + if (print) { + fprintf(stdout, "%4d %2d bits, val: %4d, variable: %d %s\n", dbg_count++, n, ret, var, dbg); + } +#endif + + return ret; + } + + static INLINE uint8_t faad_get1bit(bitfile *ld DEBUGDEC) + { + uint8_t r; + + if (ld->bits_left > 0) { + ld->bits_left--; + r = (uint8_t)((ld->bufa >> ld->bits_left) & 1); + return r; + } + + /* bits_left == 0 */ +#if 0 + r = (uint8_t)(ld->bufb >> 31); + faad_flushbits_ex(ld, 1); +#else + r = (uint8_t)faad_getbits(ld, 1); +#endif + return r; + } + + /* reversed bitreading routines */ + static INLINE uint32_t faad_showbits_rev(bitfile *ld, uint32_t bits) + { + uint8_t i; + uint32_t B = 0; + + if (bits <= ld->bits_left) { + for (i = 0; i < bits; i++) { + if (ld->bufa & (1 << (i + (32 - ld->bits_left)))) { + B |= (1 << (bits - i - 1)); + } + } + return B; + } else { + for (i = 0; i < ld->bits_left; i++) { + if (ld->bufa & (1 << (i + (32 - ld->bits_left)))) { + B |= (1 << (bits - i - 1)); + } + } + for (i = 0; i < bits - ld->bits_left; i++) { + if (ld->bufb & (1 << (i + (32 - ld->bits_left)))) { + B |= (1 << (bits - ld->bits_left - i - 1)); + } + } + return B; + } + } + + static INLINE void faad_flushbits_rev(bitfile *ld, uint32_t bits) + { + /* do nothing if error */ + if (ld->error != 0) { + return; + } + + if (bits < ld->bits_left) { + ld->bits_left -= bits; + } else { + uint32_t tmp; + + ld->bufa = ld->bufb; + tmp = getdword(ld->start); + ld->bufb = tmp; + ld->start--; + ld->bits_left += (32 - bits); + + if (ld->bytes_left < 4) { + ld->error = 1; + ld->bytes_left = 0; + } else { + ld->bytes_left -= 4; + } + // if (ld->bytes_left == 0) + // ld->no_more_reading = 1; + } + } + + static /*INLINE*/ uint32_t faad_getbits_rev(bitfile *ld, uint32_t n + DEBUGDEC) + { + uint32_t ret; + + if (n == 0) { + return 0; + } + + ret = faad_showbits_rev(ld, n); + faad_flushbits_rev(ld, n); + +#ifdef ANALYSIS + if (print) { + fprintf(stdout, "%4d %2d bits, val: %4d, variable: %d %s\n", dbg_count++, n, ret, var, dbg); + } +#endif + + return ret; + } + +#ifdef DRM + /* CRC lookup table for G8 polynome in DRM standard */ + static const uint8_t crc_table_G8[256] = { + 0x0, 0x1d, 0x3a, 0x27, 0x74, 0x69, 0x4e, 0x53, + 0xe8, 0xf5, 0xd2, 0xcf, 0x9c, 0x81, 0xa6, 0xbb, + 0xcd, 0xd0, 0xf7, 0xea, 0xb9, 0xa4, 0x83, 0x9e, + 0x25, 0x38, 0x1f, 0x2, 0x51, 0x4c, 0x6b, 0x76, + 0x87, 0x9a, 0xbd, 0xa0, 0xf3, 0xee, 0xc9, 0xd4, + 0x6f, 0x72, 0x55, 0x48, 0x1b, 0x6, 0x21, 0x3c, + 0x4a, 0x57, 0x70, 0x6d, 0x3e, 0x23, 0x4, 0x19, + 0xa2, 0xbf, 0x98, 0x85, 0xd6, 0xcb, 0xec, 0xf1, + 0x13, 0xe, 0x29, 0x34, 0x67, 0x7a, 0x5d, 0x40, + 0xfb, 0xe6, 0xc1, 0xdc, 0x8f, 0x92, 0xb5, 0xa8, + 0xde, 0xc3, 0xe4, 0xf9, 0xaa, 0xb7, 0x90, 0x8d, + 0x36, 0x2b, 0xc, 0x11, 0x42, 0x5f, 0x78, 0x65, + 0x94, 0x89, 0xae, 0xb3, 0xe0, 0xfd, 0xda, 0xc7, + 0x7c, 0x61, 0x46, 0x5b, 0x8, 0x15, 0x32, 0x2f, + 0x59, 0x44, 0x63, 0x7e, 0x2d, 0x30, 0x17, 0xa, + 0xb1, 0xac, 0x8b, 0x96, 0xc5, 0xd8, 0xff, 0xe2, + 0x26, 0x3b, 0x1c, 0x1, 0x52, 0x4f, 0x68, 0x75, + 0xce, 0xd3, 0xf4, 0xe9, 0xba, 0xa7, 0x80, 0x9d, + 0xeb, 0xf6, 0xd1, 0xcc, 0x9f, 0x82, 0xa5, 0xb8, + 0x3, 0x1e, 0x39, 0x24, 0x77, 0x6a, 0x4d, 0x50, + 0xa1, 0xbc, 0x9b, 0x86, 0xd5, 0xc8, 0xef, 0xf2, + 0x49, 0x54, 0x73, 0x6e, 0x3d, 0x20, 0x7, 0x1a, + 0x6c, 0x71, 0x56, 0x4b, 0x18, 0x5, 0x22, 0x3f, + 0x84, 0x99, 0xbe, 0xa3, 0xf0, 0xed, 0xca, 0xd7, + 0x35, 0x28, 0xf, 0x12, 0x41, 0x5c, 0x7b, 0x66, + 0xdd, 0xc0, 0xe7, 0xfa, 0xa9, 0xb4, 0x93, 0x8e, + 0xf8, 0xe5, 0xc2, 0xdf, 0x8c, 0x91, 0xb6, 0xab, + 0x10, 0xd, 0x2a, 0x37, 0x64, 0x79, 0x5e, 0x43, + 0xb2, 0xaf, 0x88, 0x95, 0xc6, 0xdb, 0xfc, 0xe1, + 0x5a, 0x47, 0x60, 0x7d, 0x2e, 0x33, 0x14, 0x9, + 0x7f, 0x62, 0x45, 0x58, 0xb, 0x16, 0x31, 0x2c, + 0x97, 0x8a, 0xad, 0xb0, 0xe3, 0xfe, 0xd9, 0xc4, + }; + + static uint8_t faad_check_CRC(bitfile *ld, uint16_t len) + { + int bytes, rem; + unsigned int CRC; + unsigned int r = 255; /* Initialize to all ones */ + + /* CRC polynome used x^8 + x^4 + x^3 + x^2 +1 */ +#define GPOLY 0435 + + faad_rewindbits(ld); + + CRC = (unsigned int) ~faad_getbits(ld, 8 + DEBUGVAR(1, 999, "faad_check_CRC(): CRC")) & 0xFF; /* CRC is stored inverted */ + + bytes = len >> 3; + rem = len & 0x7; + + for (; bytes > 0; bytes--) { + r = crc_table_G8[(r ^ faad_getbits(ld, 8 DEBUGVAR(1, 998, ""))) & 0xFF]; + } + for (; rem > 0; rem--) { + r = ((r << 1) ^(((faad_get1bit(ld + DEBUGVAR(1, 998, "")) & 1) ^((r >> 7) & 1)) * GPOLY)) & 0xFF; + } + + if (r != CRC) + // if (0) + { + return 28; + } else { + return 0; + } + } + + static uint8_t tabFlipbits[256] = { + 0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240, + 8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248, + 4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244, + 12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252, + 2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, + 10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, + 6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, + 14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254, + 1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241, + 9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249, + 5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245, + 13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, + 3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, + 11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, + 7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247, + 15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255 + }; +#endif + +#ifdef ERROR_RESILIENCE + + /* Modified bit reading functions for HCR */ + + typedef struct { + /* bit input */ + uint32_t bufa; + uint32_t bufb; + int8_t len; + } bits_t; + + + static INLINE uint32_t showbits_hcr(bits_t *ld, uint8_t bits) + { + if (bits == 0) { + return 0; + } + if (ld->len <= 32) { + /* huffman_spectral_data_2 needs to read more than may be available, bits maybe + > ld->len, deliver 0 than */ + if (ld->len >= bits) { + return ((ld->bufa >> (ld->len - bits)) & (0xFFFFFFFF >> (32 - bits))); + } else { + return ((ld->bufa << (bits - ld->len)) & (0xFFFFFFFF >> (32 - bits))); + } + } else { + if ((ld->len - bits) < 32) { + return ((ld->bufb & (0xFFFFFFFF >> (64 - ld->len))) << (bits - ld->len + 32)) | + (ld->bufa >> (ld->len - bits)); + } else { + return ((ld->bufb >> (ld->len - bits - 32)) & (0xFFFFFFFF >> (32 - bits))); + } + } + } + + /* return 1 if position is outside of buffer, 0 otherwise */ + static INLINE int8_t flushbits_hcr(bits_t *ld, uint8_t bits) + { + ld->len -= bits; + + if (ld->len < 0) { + ld->len = 0; + return 1; + } else { + return 0; + } + } + + static INLINE int8_t getbits_hcr(bits_t *ld, uint8_t n, uint32_t *result) + { + *result = showbits_hcr(ld, n); + return flushbits_hcr(ld, n); + } + + static INLINE int8_t get1bit_hcr(bits_t *ld, uint8_t *result) + { + uint32_t res; + int8_t ret; + + ret = getbits_hcr(ld, 1, &res); + *result = (int8_t)(res & 1); + return ret; + } + +#endif + + +#ifdef __cplusplus +} +#endif +#endif |