From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/libfaad/codebook/hcb.h | 142 ++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 lib/rbcodec/codecs/libfaad/codebook/hcb.h (limited to 'lib/rbcodec/codecs/libfaad/codebook/hcb.h') diff --git a/lib/rbcodec/codecs/libfaad/codebook/hcb.h b/lib/rbcodec/codecs/libfaad/codebook/hcb.h new file mode 100644 index 0000000000..eaefdbf437 --- /dev/null +++ b/lib/rbcodec/codecs/libfaad/codebook/hcb.h @@ -0,0 +1,142 @@ +/* +** 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. +** +** $Id$ +**/ + +#ifndef __HCB_H__ +#define __HCB_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +/* + * Optimal huffman decoding for AAC taken from: + * "SELECTING AN OPTIMAL HUFFMAN DECODER FOR AAC" by + * VLADIMIR Z. MESAROVIC , RAGHUNATH RAO, MIROSLAV V. DOKIC, and SACHIN DEO + * AES paper 5436 + * + * 2 methods are used for huffman decoding: + * - binary search + * - 2-step table lookup + * + * The choice of the "optimal" method is based on the fact that if the + * memory size for the Two-step is exorbitantly high then the decision + * is Binary search for that codebook. However, for marginally more memory + * size, if Twostep outperforms even the best case of Binary then the + * decision is Two-step for that codebook. + * + * The following methods are used for the different tables. + * codebook "optimal" method + * HCB_1 2-Step + * HCB_2 2-Step + * HCB_3 Binary + * HCB_4 2-Step + * HCB_5 Binary + * HCB_6 2-Step + * HCB_7 Binary + * HCB_8 2-Step + * HCB_9 Binary + * HCB_10 2-Step + * HCB_11 2-Step + * HCB_SF Binary + * + */ + + +#define ZERO_HCB 0 +#define FIRST_PAIR_HCB 5 +#define ESC_HCB 11 +#define QUAD_LEN 4 +#define PAIR_LEN 2 +#define NOISE_HCB 13 +#define INTENSITY_HCB2 14 +#define INTENSITY_HCB 15 + +/* 1st step table */ +typedef struct +{ + uint8_t offset; + uint8_t extra_bits; +} hcb; + +/* 2nd step table with quadruple data */ +typedef struct +{ + uint8_t bits; + int8_t x; + int8_t y; +} hcb_2_pair; + +typedef struct +{ + uint8_t bits; + int8_t x; + int8_t y; + int8_t v; + int8_t w; +} hcb_2_quad; + +/* binary search table */ +typedef struct +{ + uint8_t is_leaf; + int8_t data[4]; +} hcb_bin_quad; + +typedef struct +{ + uint8_t is_leaf; + int8_t data[2]; +} hcb_bin_pair; + +hcb *hcb_table[]; +hcb_2_quad *hcb_2_quad_table[]; +hcb_2_pair *hcb_2_pair_table[]; +hcb_bin_pair *hcb_bin_table[]; +uint8_t hcbN[]; +uint8_t unsigned_cb[]; +int hcb_2_quad_table_size[]; +int hcb_2_pair_table_size[]; +int hcb_bin_table_size[]; + +#include "codebook/hcb_1.h" +#include "codebook/hcb_2.h" +#include "codebook/hcb_3.h" +#include "codebook/hcb_4.h" +#include "codebook/hcb_5.h" +#include "codebook/hcb_6.h" +#include "codebook/hcb_7.h" +#include "codebook/hcb_8.h" +#include "codebook/hcb_9.h" +#include "codebook/hcb_10.h" +#include "codebook/hcb_11.h" +#include "codebook/hcb_sf.h" + + +#ifdef __cplusplus +} +#endif +#endif -- cgit v1.2.3