2 * AAC Spectral Band Replication function declarations
3 * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
4 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * AAC Spectral Band Replication function declarations
26 * @author Robert Swain ( rob opendot cl )
29 #ifndef AVCODEC_AACSBR_H
30 #define AVCODEC_AACSBR_H
36 #define ENVELOPE_ADJUSTMENT_OFFSET 2
37 #define NOISE_FLOOR_OFFSET 6
45 T_HUFFMAN_ENV_BAL_1_5DB,
46 F_HUFFMAN_ENV_BAL_1_5DB,
49 T_HUFFMAN_ENV_BAL_3_0DB,
50 F_HUFFMAN_ENV_BAL_3_0DB,
51 T_HUFFMAN_NOISE_3_0DB,
52 T_HUFFMAN_NOISE_BAL_3_0DB,
56 * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)
69 static const int8_t vlc_sbr_lav[10] =
70 { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 };
72 #define SBR_INIT_VLC_STATIC(num, size) \
73 INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \
74 sbr_tmp[num].sbr_bits , 1, 1, \
75 sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \
78 #define SBR_VLC_ROW(name) \
79 { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
81 /** Initialize SBR. */
82 void AAC_RENAME(ff_aac_sbr_init)(void);
83 /** Initialize one SBR context. */
84 void AAC_RENAME(ff_aac_sbr_ctx_init)(AACContext *ac, SpectralBandReplication *sbr);
85 /** Close one SBR context. */
86 void AAC_RENAME(ff_aac_sbr_ctx_close)(SpectralBandReplication *sbr);
87 /** Decode one SBR element. */
88 int AAC_RENAME(ff_decode_sbr_extension)(AACContext *ac, SpectralBandReplication *sbr,
89 GetBitContext *gb, int crc, int cnt, int id_aac);
90 /** Apply one SBR element to one AAC element. */
91 void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
92 INTFLOAT* L, INTFLOAT *R);
94 void ff_aacsbr_func_ptr_init_mips(AACSBRContext *c);
96 #endif /* AVCODEC_AACSBR_H */