CARPLAY版本整理
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MXC_A27-PCB4.5-270T/lib/faad2/libfaad/huffman.c
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559
MXC_A27-PCB4.5-270T/lib/faad2/libfaad/huffman.c
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/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program 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
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** The "appropriate copyright message" mentioned in section 2c of the GPLv2
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** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
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**
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** $Id: huffman.c,v 1.26 2007/11/01 12:33:30 menno Exp $
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**/
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#include "common.h"
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#include "structs.h"
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#include <stdlib.h>
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#ifdef ANALYSIS
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#include <stdio.h>
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#endif
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#include "bits.h"
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#include "huffman.h"
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#include "codebook/hcb.h"
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/* static function declarations */
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static INLINE void huffman_sign_bits(bitfile *ld, int16_t *sp, uint8_t len);
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static INLINE int16_t huffman_getescape(bitfile *ld, int16_t sp);
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static uint8_t huffman_2step_quad(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_2step_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_2step_pair(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_2step_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_binary_quad(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_binary_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_binary_pair(uint8_t cb, bitfile *ld, int16_t *sp);
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static uint8_t huffman_binary_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp);
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static int16_t huffman_codebook(uint8_t i);
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static void vcb11_check_LAV(uint8_t cb, int16_t *sp);
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int8_t huffman_scale_factor(bitfile *ld)
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{
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uint16_t offset = 0;
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while (hcb_sf[offset][1])
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{
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uint8_t b = faad_get1bit(ld
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DEBUGVAR(1,255,"huffman_scale_factor()"));
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offset += hcb_sf[offset][b];
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if (offset > 240)
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{
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/* printf("ERROR: offset into hcb_sf = %d >240!\n", offset); */
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return -1;
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}
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}
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return hcb_sf[offset][0];
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}
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hcb *hcb_table[] = {
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0, hcb1_1, hcb2_1, 0, hcb4_1, 0, hcb6_1, 0, hcb8_1, 0, hcb10_1, hcb11_1
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};
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hcb_2_quad *hcb_2_quad_table[] = {
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0, hcb1_2, hcb2_2, 0, hcb4_2, 0, 0, 0, 0, 0, 0, 0
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};
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hcb_2_pair *hcb_2_pair_table[] = {
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0, 0, 0, 0, 0, 0, hcb6_2, 0, hcb8_2, 0, hcb10_2, hcb11_2
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};
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hcb_bin_pair *hcb_bin_table[] = {
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0, 0, 0, 0, 0, hcb5, 0, hcb7, 0, hcb9, 0, 0
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};
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uint8_t hcbN[] = { 0, 5, 5, 0, 5, 0, 5, 0, 5, 0, 6, 5 };
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/* defines whether a huffman codebook is unsigned or not */
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/* Table 4.6.2 */
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uint8_t unsigned_cb[] = { 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0,
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/* codebook 16 to 31 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
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};
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int hcb_2_quad_table_size[] = { 0, 114, 86, 0, 185, 0, 0, 0, 0, 0, 0, 0 };
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int hcb_2_pair_table_size[] = { 0, 0, 0, 0, 0, 0, 126, 0, 83, 0, 210, 373 };
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int hcb_bin_table_size[] = { 0, 0, 0, 161, 0, 161, 0, 127, 0, 337, 0, 0 };
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static INLINE void huffman_sign_bits(bitfile *ld, int16_t *sp, uint8_t len)
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{
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uint8_t i;
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for (i = 0; i < len; i++)
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{
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if(sp[i])
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{
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if(faad_get1bit(ld
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DEBUGVAR(1,5,"huffman_sign_bits(): sign bit")) & 1)
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{
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sp[i] = -sp[i];
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}
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}
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}
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}
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static INLINE int16_t huffman_getescape(bitfile *ld, int16_t sp)
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{
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uint8_t neg, i;
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int16_t j;
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int16_t off;
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if (sp < 0)
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{
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if (sp != -16)
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return sp;
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neg = 1;
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} else {
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if (sp != 16)
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return sp;
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neg = 0;
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}
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for (i = 4; ; i++)
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{
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if (faad_get1bit(ld
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DEBUGVAR(1,6,"huffman_getescape(): escape size")) == 0)
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{
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break;
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}
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}
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off = (int16_t)faad_getbits(ld, i
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DEBUGVAR(1,9,"huffman_getescape(): escape"));
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j = off | (1<<i);
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if (neg)
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j = -j;
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return j;
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}
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static uint8_t huffman_2step_quad(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint32_t cw;
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uint16_t offset = 0;
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uint8_t extra_bits;
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cw = faad_showbits(ld, hcbN[cb]);
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offset = hcb_table[cb][cw].offset;
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extra_bits = hcb_table[cb][cw].extra_bits;
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if (extra_bits)
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{
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/* we know for sure it's more than hcbN[cb] bits long */
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faad_flushbits(ld, hcbN[cb]);
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offset += (uint16_t)faad_showbits(ld, extra_bits);
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faad_flushbits(ld, hcb_2_quad_table[cb][offset].bits - hcbN[cb]);
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} else {
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faad_flushbits(ld, hcb_2_quad_table[cb][offset].bits);
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}
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if (offset > hcb_2_quad_table_size[cb])
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{
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/* printf("ERROR: offset into hcb_2_quad_table = %d >%d!\n", offset,
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hcb_2_quad_table_size[cb]); */
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return 10;
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}
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sp[0] = hcb_2_quad_table[cb][offset].x;
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sp[1] = hcb_2_quad_table[cb][offset].y;
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sp[2] = hcb_2_quad_table[cb][offset].v;
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sp[3] = hcb_2_quad_table[cb][offset].w;
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return 0;
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}
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static uint8_t huffman_2step_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint8_t err = huffman_2step_quad(cb, ld, sp);
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huffman_sign_bits(ld, sp, QUAD_LEN);
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return err;
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}
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static uint8_t huffman_2step_pair(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint32_t cw;
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uint16_t offset = 0;
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uint8_t extra_bits;
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cw = faad_showbits(ld, hcbN[cb]);
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offset = hcb_table[cb][cw].offset;
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extra_bits = hcb_table[cb][cw].extra_bits;
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if (extra_bits)
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{
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/* we know for sure it's more than hcbN[cb] bits long */
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faad_flushbits(ld, hcbN[cb]);
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offset += (uint16_t)faad_showbits(ld, extra_bits);
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faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits - hcbN[cb]);
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} else {
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faad_flushbits(ld, hcb_2_pair_table[cb][offset].bits);
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}
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if (offset > hcb_2_pair_table_size[cb])
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{
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/* printf("ERROR: offset into hcb_2_pair_table = %d >%d!\n", offset,
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hcb_2_pair_table_size[cb]); */
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return 10;
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}
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sp[0] = hcb_2_pair_table[cb][offset].x;
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sp[1] = hcb_2_pair_table[cb][offset].y;
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return 0;
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}
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static uint8_t huffman_2step_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint8_t err = huffman_2step_pair(cb, ld, sp);
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huffman_sign_bits(ld, sp, PAIR_LEN);
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return err;
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}
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static uint8_t huffman_binary_quad(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint16_t offset = 0;
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while (!hcb3[offset].is_leaf)
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{
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uint8_t b = faad_get1bit(ld
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DEBUGVAR(1,255,"huffman_spectral_data():3"));
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offset += hcb3[offset].data[b];
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}
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if (offset > hcb_bin_table_size[cb])
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{
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/* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset,
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hcb_bin_table_size[cb]); */
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return 10;
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}
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sp[0] = hcb3[offset].data[0];
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sp[1] = hcb3[offset].data[1];
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sp[2] = hcb3[offset].data[2];
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sp[3] = hcb3[offset].data[3];
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return 0;
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}
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static uint8_t huffman_binary_quad_sign(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint8_t err = huffman_binary_quad(cb, ld, sp);
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huffman_sign_bits(ld, sp, QUAD_LEN);
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return err;
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}
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static uint8_t huffman_binary_pair(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint16_t offset = 0;
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while (!hcb_bin_table[cb][offset].is_leaf)
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{
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uint8_t b = faad_get1bit(ld
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DEBUGVAR(1,255,"huffman_spectral_data():9"));
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offset += hcb_bin_table[cb][offset].data[b];
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}
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if (offset > hcb_bin_table_size[cb])
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{
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/* printf("ERROR: offset into hcb_bin_table = %d >%d!\n", offset,
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hcb_bin_table_size[cb]); */
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return 10;
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}
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sp[0] = hcb_bin_table[cb][offset].data[0];
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sp[1] = hcb_bin_table[cb][offset].data[1];
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return 0;
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}
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static uint8_t huffman_binary_pair_sign(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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uint8_t err = huffman_binary_pair(cb, ld, sp);
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huffman_sign_bits(ld, sp, PAIR_LEN);
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return err;
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}
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static int16_t huffman_codebook(uint8_t i)
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{
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static const uint32_t data = 16428320;
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if (i == 0) return (int16_t)(data >> 16) & 0xFFFF;
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else return (int16_t)data & 0xFFFF;
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}
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static void vcb11_check_LAV(uint8_t cb, int16_t *sp)
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{
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static const uint16_t vcb11_LAV_tab[] = {
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16, 31, 47, 63, 95, 127, 159, 191, 223,
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255, 319, 383, 511, 767, 1023, 2047
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};
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uint16_t max = 0;
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if (cb < 16 || cb > 31)
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return;
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max = vcb11_LAV_tab[cb - 16];
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if ((abs(sp[0]) > max) || (abs(sp[1]) > max))
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{
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sp[0] = 0;
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sp[1] = 0;
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}
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}
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uint8_t huffman_spectral_data(uint8_t cb, bitfile *ld, int16_t *sp)
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{
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switch (cb)
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{
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case 1: /* 2-step method for data quadruples */
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case 2:
|
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return huffman_2step_quad(cb, ld, sp);
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case 3: /* binary search for data quadruples */
|
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return huffman_binary_quad_sign(cb, ld, sp);
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case 4: /* 2-step method for data quadruples */
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return huffman_2step_quad_sign(cb, ld, sp);
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case 5: /* binary search for data pairs */
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return huffman_binary_pair(cb, ld, sp);
|
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case 6: /* 2-step method for data pairs */
|
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return huffman_2step_pair(cb, ld, sp);
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case 7: /* binary search for data pairs */
|
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case 9:
|
||||
return huffman_binary_pair_sign(cb, ld, sp);
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case 8: /* 2-step method for data pairs */
|
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case 10:
|
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return huffman_2step_pair_sign(cb, ld, sp);
|
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case 12: {
|
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uint8_t err = huffman_2step_pair(11, ld, sp);
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||||
sp[0] = huffman_codebook(0); sp[1] = huffman_codebook(1);
|
||||
return err; }
|
||||
case 11:
|
||||
{
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uint8_t err = huffman_2step_pair_sign(11, ld, sp);
|
||||
sp[0] = huffman_getescape(ld, sp[0]);
|
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sp[1] = huffman_getescape(ld, sp[1]);
|
||||
return err;
|
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}
|
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#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:
|
||||
{
|
||||
uint8_t err = huffman_2step_pair_sign(11, ld, sp);
|
||||
sp[0] = huffman_getescape(ld, sp[0]);
|
||||
sp[1] = huffman_getescape(ld, sp[1]);
|
||||
|
||||
/* check LAV (Largest Absolute Value) */
|
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/* this finds errors in the ESCAPE signal */
|
||||
vcb11_check_LAV(cb, sp);
|
||||
|
||||
return err;
|
||||
}
|
||||
#endif
|
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default:
|
||||
/* Non existent codebook number, something went wrong */
|
||||
return 11;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
#ifdef ERROR_RESILIENCE
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||||
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/* Special version of huffman_spectral_data
|
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Will not read from a bitfile but a bits_t structure.
|
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Will keep track of the bits decoded and return the number of bits remaining.
|
||||
Do not read more than ld->len, return -1 if codeword would be longer */
|
||||
|
||||
int8_t huffman_spectral_data_2(uint8_t cb, bits_t *ld, int16_t *sp)
|
||||
{
|
||||
uint32_t cw;
|
||||
uint16_t offset = 0;
|
||||
uint8_t extra_bits;
|
||||
uint8_t i, vcb11 = 0;
|
||||
|
||||
|
||||
switch (cb)
|
||||
{
|
||||
case 1: /* 2-step method for data quadruples */
|
||||
case 2:
|
||||
case 4:
|
||||
|
||||
cw = showbits_hcr(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 */
|
||||
if ( flushbits_hcr(ld, hcbN[cb]) ) return -1;
|
||||
offset += (uint16_t)showbits_hcr(ld, extra_bits);
|
||||
if ( flushbits_hcr(ld, hcb_2_quad_table[cb][offset].bits - hcbN[cb]) ) return -1;
|
||||
} else {
|
||||
if ( flushbits_hcr(ld, hcb_2_quad_table[cb][offset].bits) ) return -1;
|
||||
}
|
||||
|
||||
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;
|
||||
break;
|
||||
|
||||
case 6: /* 2-step method for data pairs */
|
||||
case 8:
|
||||
case 10:
|
||||
case 11:
|
||||
/* 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:
|
||||
|
||||
if (cb >= 16)
|
||||
{
|
||||
/* store the virtual codebook */
|
||||
vcb11 = cb;
|
||||
cb = 11;
|
||||
}
|
||||
|
||||
cw = showbits_hcr(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 */
|
||||
if ( flushbits_hcr(ld, hcbN[cb]) ) return -1;
|
||||
offset += (uint16_t)showbits_hcr(ld, extra_bits);
|
||||
if ( flushbits_hcr(ld, hcb_2_pair_table[cb][offset].bits - hcbN[cb]) ) return -1;
|
||||
} else {
|
||||
if ( flushbits_hcr(ld, hcb_2_pair_table[cb][offset].bits) ) return -1;
|
||||
}
|
||||
sp[0] = hcb_2_pair_table[cb][offset].x;
|
||||
sp[1] = hcb_2_pair_table[cb][offset].y;
|
||||
break;
|
||||
|
||||
case 3: /* binary search for data quadruples */
|
||||
|
||||
while (!hcb3[offset].is_leaf)
|
||||
{
|
||||
uint8_t b;
|
||||
|
||||
if ( get1bit_hcr(ld, &b) ) return -1;
|
||||
offset += hcb3[offset].data[b];
|
||||
}
|
||||
|
||||
sp[0] = hcb3[offset].data[0];
|
||||
sp[1] = hcb3[offset].data[1];
|
||||
sp[2] = hcb3[offset].data[2];
|
||||
sp[3] = hcb3[offset].data[3];
|
||||
|
||||
break;
|
||||
|
||||
case 5: /* binary search for data pairs */
|
||||
case 7:
|
||||
case 9:
|
||||
|
||||
while (!hcb_bin_table[cb][offset].is_leaf)
|
||||
{
|
||||
uint8_t b;
|
||||
|
||||
if (get1bit_hcr(ld, &b) ) return -1;
|
||||
offset += hcb_bin_table[cb][offset].data[b];
|
||||
}
|
||||
|
||||
sp[0] = hcb_bin_table[cb][offset].data[0];
|
||||
sp[1] = hcb_bin_table[cb][offset].data[1];
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
/* decode sign bits */
|
||||
if (unsigned_cb[cb])
|
||||
{
|
||||
for(i = 0; i < ((cb < FIRST_PAIR_HCB) ? QUAD_LEN : PAIR_LEN); i++)
|
||||
{
|
||||
if(sp[i])
|
||||
{
|
||||
uint8_t b;
|
||||
if ( get1bit_hcr(ld, &b) ) return -1;
|
||||
if (b != 0) {
|
||||
sp[i] = -sp[i];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* decode huffman escape bits */
|
||||
if ((cb == ESC_HCB) || (cb >= 16))
|
||||
{
|
||||
uint8_t k;
|
||||
for (k = 0; k < 2; k++)
|
||||
{
|
||||
if ((sp[k] == 16) || (sp[k] == -16))
|
||||
{
|
||||
uint8_t neg, i;
|
||||
int32_t j;
|
||||
uint32_t off;
|
||||
|
||||
neg = (sp[k] < 0) ? 1 : 0;
|
||||
|
||||
for (i = 4; ; i++)
|
||||
{
|
||||
uint8_t b;
|
||||
if (get1bit_hcr(ld, &b))
|
||||
return -1;
|
||||
if (b == 0)
|
||||
break;
|
||||
}
|
||||
|
||||
if (getbits_hcr(ld, i, &off))
|
||||
return -1;
|
||||
j = off + (1<<i);
|
||||
sp[k] = (int16_t)((neg) ? -j : j);
|
||||
}
|
||||
}
|
||||
|
||||
if (vcb11 != 0)
|
||||
{
|
||||
/* check LAV (Largest Absolute Value) */
|
||||
/* this finds errors in the ESCAPE signal */
|
||||
vcb11_check_LAV(vcb11, sp);
|
||||
}
|
||||
}
|
||||
return ld->len;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
Reference in New Issue
Block a user