From 32063c433915b8dddd143a951ad90ae901ac1b38 Mon Sep 17 00:00:00 2001 From: arpi Date: Sat, 30 Aug 2003 22:30:28 +0000 Subject: libfaad2 v2.0rc1 imported git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10726 b3059339-0415-0410-9bf9-f77b7e298cf2 --- libfaad2/huffman.h | 350 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 350 insertions(+) create mode 100644 libfaad2/huffman.h (limited to 'libfaad2/huffman.h') diff --git a/libfaad2/huffman.h b/libfaad2/huffman.h new file mode 100644 index 0000000000..09079bd877 --- /dev/null +++ b/libfaad2/huffman.h @@ -0,0 +1,350 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003 M. Bakker, Ahead Software 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. +** +** Commercial non-GPL licensing of this software is possible. +** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. +** +** $Id: huffman.h,v 1.13 2003/07/29 08:20:12 menno Exp $ +**/ + +#ifndef __HUFFMAN_H__ +#define __HUFFMAN_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include +#ifdef ANALYSIS +#include +#endif +#include "bits.h" +#include "codebook/hcb.h" + + +static INLINE int8_t huffman_scale_factor(bitfile *ld) +{ + uint16_t offset = 0; + + while (hcb_sf[offset][1]) + { + uint8_t b = faad_get1bit(ld + DEBUGVAR(1,255,"huffman_scale_factor()")); + offset += hcb_sf[offset][b]; + + if (offset > 240) + { + /* printf("ERROR: offset into hcb_sf = %d >240!\n", offset); */ + return -1; + } + } + + return hcb_sf[offset][0]; +} + + +hcb *hcb_table[] = { + 0, hcb1_1, hcb2_1, 0, hcb4_1, 0, hcb6_1, 0, hcb8_1, 0, hcb10_1, hcb11_1 +}; + +hcb_2_quad *hcb_2_quad_table[] = { + 0, hcb1_2, hcb2_2, 0, hcb4_2, 0, 0, 0, 0, 0, 0, 0 +}; + +hcb_2_pair *hcb_2_pair_table[] = { + 0, 0, 0, 0, 0, 0, hcb6_2, 0, hcb8_2, 0, hcb10_2, hcb11_2 +}; + +hcb_bin_pair *hcb_bin_table[] = { + 0, 0, 0, 0, 0, hcb5, 0, hcb7, 0, hcb9, 0, 0 +}; + +uint8_t hcbN[] = { 0, 5, 5, 0, 5, 0, 5, 0, 5, 0, 6, 5 }; + +/* defines whether a huffman codebook is unsigned or not */ +/* Table 4.6.2 */ +uint8_t unsigned_cb[] = { 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, + /* codebook 16 to 31 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 +}; + +int hcb_2_quad_table_size[] = { 0, 114, 86, 0, 185, 0, 0, 0, 0, 0, 0, 0 }; +int hcb_2_pair_table_size[] = { 0, 0, 0, 0, 0, 0, 126, 0, 83, 0, 210, 373 }; +int hcb_bin_table_size[] = { 0, 0, 0, 161, 0, 161, 0, 127, 0, 337, 0, 0 }; + +static INLINE void huffman_sign_bits(bitfile *ld, int16_t *sp, uint8_t len) +{ + uint8_t i; + + for(i = 0; i < len; i++) + { + if(sp[i]) + { + if(faad_get1bit(ld + DEBUGVAR(1,5,"huffman_sign_bits(): sign bit")) & 1) + { + sp[i] = -sp[i]; + } + } + } +} + +static INLINE int16_t huffman_getescape(bitfile *ld, int16_t sp) +{ + uint8_t neg, i; + int16_t j; + int32_t off; + + if (sp < 0) { + if(sp != -16) + return sp; + neg = 1; + } else { + if(sp != 16) + return sp; + neg = 0; + } + + for (i = 4; ; i++) + { + if (faad_get1bit(ld + DEBUGVAR(1,6,"huffman_getescape(): escape size")) == 0) + { + break; + } + } + + off = faad_getbits(ld, i + DEBUGVAR(1,9,"huffman_getescape(): escape")); + + j = off + (1< hcb_2_quad_table_size[cb]) + { + /* printf("ERROR: offset into hcb_2_quad_table = %d >%d!\n", offset, + hcb_2_quad_table_size[cb]); */ + return 10; + } + + sp[0] = hcb_2_quad_table[cb][offset].x; + sp[1] = hcb_2_quad_table[cb][offset].y; + sp[2] = hcb_2_quad_table[cb][offset].v; + sp[3] = hcb_2_quad_table[cb][offset].w; + + return 0; +} + +static uint8_t huffman_2step_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint8_t err = huffman_2step_quad(cb, ld, sp); + huffman_sign_bits(ld, sp, QUAD_LEN); + + return err; +} + +static uint8_t huffman_2step_pair(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint32_t cw; + uint16_t offset = 0; + uint8_t extra_bits; + + cw = faad_showbits(ld, hcbN[cb]); + offset = hcb_table[cb][cw].offset; + extra_bits = hcb_table[cb][cw].extra_bits; + + if (extra_bits) + { + /* we know for sure it's more than hcbN[cb] bits long */ + faad_flushbits(ld, hcbN[cb]); + offset += (uint16_t)faad_showbits(ld, extra_bits); + faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits - hcbN[cb]); + } else { + faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits); + } + + if (offset > hcb_2_pair_table_size[cb]) + { + /* printf("ERROR: offset into hcb_2_pair_table = %d >%d!\n", offset, + hcb_2_pair_table_size[cb]); */ + return 10; + } + + sp[0] = hcb_2_pair_table[cb][offset].x; + sp[1] = hcb_2_pair_table[cb][offset].y; + + return 0; +} + +static huffman_2step_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint8_t err = huffman_2step_pair(cb, ld, sp); + huffman_sign_bits(ld, sp, PAIR_LEN); + + return err; +} + +static uint8_t huffman_binary_quad(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint16_t offset = 0; + + while (!hcb3[offset].is_leaf) + { + uint8_t b = faad_get1bit(ld + DEBUGVAR(1,255,"huffman_spectral_data():3")); + offset += hcb3[offset].data[b]; + } + + if (offset > hcb_bin_table_size[cb]) + { + /* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset, + hcb_bin_table_size[cb]); */ + return 10; + } + + sp[0] = hcb3[offset].data[0]; + sp[1] = hcb3[offset].data[1]; + sp[2] = hcb3[offset].data[2]; + sp[3] = hcb3[offset].data[3]; + + return 0; +} + +static uint8_t huffman_binary_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint8_t err = huffman_binary_quad(cb, ld, sp); + huffman_sign_bits(ld, sp, QUAD_LEN); + + return err; +} + +static uint8_t huffman_binary_pair(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint16_t offset = 0; + + while (!hcb_bin_table[cb][offset].is_leaf) + { + uint8_t b = faad_get1bit(ld + DEBUGVAR(1,255,"huffman_spectral_data():9")); + offset += hcb_bin_table[cb][offset].data[b]; + } + + if (offset > hcb_bin_table_size[cb]) + { + /* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset, + hcb_bin_table_size[cb]); */ + return 10; + } + + sp[0] = hcb_bin_table[cb][offset].data[0]; + sp[1] = hcb_bin_table[cb][offset].data[1]; + + return 0; +} + +static uint8_t huffman_binary_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp) +{ + uint8_t err = huffman_binary_pair(cb, ld, sp); + huffman_sign_bits(ld, sp, PAIR_LEN); + + return err; +} + +static int16_t huffman_codebook(uint8_t i) +{ + static const uint32_t data = 16428320; + if (i == 0) return (int16_t)(data >> 16) & 0xFFFF; + else return (int16_t)data & 0xFFFF; +} + +static INLINE uint8_t huffman_spectral_data(uint8_t cb, bitfile *ld, int16_t *sp) +{ + switch (cb) + { + case 1: /* 2-step method for data quadruples */ + case 2: + return huffman_2step_quad(cb, ld, sp); + case 3: /* binary search for data quadruples */ + return huffman_binary_quad_sign(cb, ld, sp); + case 4: /* 2-step method for data quadruples */ + return huffman_2step_quad_sign(cb, ld, sp); + case 5: /* binary search for data pairs */ + return huffman_binary_pair(cb, ld, sp); + case 6: /* 2-step method for data pairs */ + return huffman_2step_pair(cb, ld, sp); + case 7: /* binary search for data pairs */ + case 9: + return huffman_binary_pair_sign(cb, ld, sp); + case 8: /* 2-step method for data pairs */ + case 10: + return huffman_2step_pair_sign(cb, ld, sp); + case 12: { + uint8_t err = huffman_2step_quad(1, ld, sp); + sp[0] = huffman_codebook(0); sp[1] = huffman_codebook(1); + return err; } + case 11: +#ifdef ERROR_RESILIENCE + /* VCB11 uses codebook 11 */ + case 16: case 17: case 18: case 19: case 20: case 21: case 22: case 23: + case 24: case 25: case 26: case 27: case 28: case 29: case 30: case 31: + /* TODO: If ER is used, some extra error checking should be done */ +#endif + { + uint8_t err = huffman_2step_pair_sign(11, ld, sp); + sp[0] = huffman_getescape(ld, sp[0]); + sp[1] = huffman_getescape(ld, sp[1]); + return err; + } + default: + /* Non existent codebook number, something went wrong */ + return 11; + } + + return 0; +} + +#ifdef __cplusplus +} +#endif +#endif -- cgit v1.2.3