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aacsbr.h
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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 {
53 };
54 
55 /**
56  * bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)
57  */
58 enum {
63 };
64 
65 enum {
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. */
83 /** Initialize one SBR context. */
85 /** Close one SBR context. */
87 /** Decode one SBR element. */
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 
95 
96 #endif /* AVCODEC_AACSBR_H */
static const int8_t vlc_sbr_lav[10]
Definition: aacsbr.h:69
Definition: aacsbr.h:59
Definition: aacsbr.h:61
Definition: aacsbr.h:60
float INTFLOAT
Definition: aac_defines.h:85
void ff_aacsbr_func_ptr_init_mips(AACSBRContext *c)
Definition: aacsbr_mips.c:611
bitstream reader API header.
void AAC_RENAME() ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, INTFLOAT *L, INTFLOAT *R)
Apply one SBR element to one AAC element.
Spectral Band Replication definitions and structures.
#define AAC_RENAME(x)
Definition: aac_defines.h:83
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int AAC_RENAME() ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr, GetBitContext *gb, int crc, int cnt, int id_aac)
Decode one SBR element.
void AAC_RENAME() ff_aac_sbr_ctx_close(SpectralBandReplication *sbr)
Close one SBR context.
AAC definitions and structures.
#define L(x)
Definition: vp56_arith.h:36
void AAC_RENAME() ff_aac_sbr_init(void)
Initialize SBR.
void AAC_RENAME() ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr)
Initialize one SBR context.
main AAC context
Definition: aac.h:293
static double c[64]
aacsbr functions pointers
Definition: sbr.h:120
Definition: aacsbr.h:62
Definition: vf_geq.c:46
Spectral Band Replication.
Definition: sbr.h:139