/* * AAC Spectral Band Replication function declarations * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * AAC Spectral Band Replication function declarations * @author Robert Swain ( rob opendot cl ) */ #ifndef AVCODEC_AACSBR_H #define AVCODEC_AACSBR_H #include "get_bits.h" #include "aac.h" #include "sbr.h" #define ENVELOPE_ADJUSTMENT_OFFSET 2 #define NOISE_FLOOR_OFFSET FIXR(6.0f) /** * SBR VLC tables */ enum { T_HUFFMAN_ENV_1_5DB, F_HUFFMAN_ENV_1_5DB, T_HUFFMAN_ENV_BAL_1_5DB, F_HUFFMAN_ENV_BAL_1_5DB, T_HUFFMAN_ENV_3_0DB, F_HUFFMAN_ENV_3_0DB, T_HUFFMAN_ENV_BAL_3_0DB, F_HUFFMAN_ENV_BAL_3_0DB, T_HUFFMAN_NOISE_3_0DB, T_HUFFMAN_NOISE_BAL_3_0DB, }; /** * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) */ enum { FIXFIX, FIXVAR, VARFIX, VARVAR, }; enum { EXTENSION_ID_PS = 2, }; static const int8_t vlc_sbr_lav[10] = { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 }; #define SBR_INIT_VLC_STATIC(num, size) \ INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \ sbr_tmp[num].sbr_bits , 1, 1, \ sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \ size) #define SBR_VLC_ROW(name) \ { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) } /** Initialize SBR. */ void AAC_RENAME(ff_aac_sbr_init)(void); /** Initialize one SBR context. */ void AAC_RENAME(ff_aac_sbr_ctx_init)(AACContext *ac, SpectralBandReplication *sbr); /** Close one SBR context. */ void AAC_RENAME(ff_aac_sbr_ctx_close)(SpectralBandReplication *sbr); /** Decode one SBR element. */ int AAC_RENAME(ff_decode_sbr_extension)(AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, int crc, int cnt, int id_aac); /** Apply one SBR element to one AAC element. */ void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int id_aac, INTFLOAT* L, INTFLOAT *R); void ff_aacsbr_func_ptr_init_mips(AACSBRContext *c); #endif /* AVCODEC_AACSBR_H */