blob: dd8b66c7bbc874439703701e0d3efb54a36ae3ca
| 1 | /* |
| 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> |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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 |
| 21 | */ |
| 22 | |
| 23 | /** |
| 24 | * @file |
| 25 | * AAC Spectral Band Replication function declarations |
| 26 | * @author Robert Swain ( rob opendot cl ) |
| 27 | */ |
| 28 | |
| 29 | #ifndef AVCODEC_AACSBR_H |
| 30 | #define AVCODEC_AACSBR_H |
| 31 | |
| 32 | #include "get_bits.h" |
| 33 | #include "aac.h" |
| 34 | #include "sbr.h" |
| 35 | |
| 36 | #define ENVELOPE_ADJUSTMENT_OFFSET 2 |
| 37 | #define NOISE_FLOOR_OFFSET 6 |
| 38 | |
| 39 | /** |
| 40 | * SBR VLC tables |
| 41 | */ |
| 42 | enum { |
| 43 | T_HUFFMAN_ENV_1_5DB, |
| 44 | F_HUFFMAN_ENV_1_5DB, |
| 45 | T_HUFFMAN_ENV_BAL_1_5DB, |
| 46 | F_HUFFMAN_ENV_BAL_1_5DB, |
| 47 | T_HUFFMAN_ENV_3_0DB, |
| 48 | F_HUFFMAN_ENV_3_0DB, |
| 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, |
| 53 | }; |
| 54 | |
| 55 | /** |
| 56 | * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98) |
| 57 | */ |
| 58 | enum { |
| 59 | FIXFIX, |
| 60 | FIXVAR, |
| 61 | VARFIX, |
| 62 | VARVAR, |
| 63 | }; |
| 64 | |
| 65 | enum { |
| 66 | EXTENSION_ID_PS = 2, |
| 67 | }; |
| 68 | |
| 69 | static const int8_t vlc_sbr_lav[10] = |
| 70 | { 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 }; |
| 71 | |
| 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, \ |
| 76 | size) |
| 77 | |
| 78 | #define SBR_VLC_ROW(name) \ |
| 79 | { name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) } |
| 80 | |
| 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, int id_aac); |
| 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); |
| 93 | |
| 94 | void ff_aacsbr_func_ptr_init_mips(AACSBRContext *c); |
| 95 | |
| 96 | #endif /* AVCODEC_AACSBR_H */ |
| 97 |