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aacenc_is.h
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1 /*
2  * AAC encoder intensity stereo
3  * Copyright (C) 2015 Rostislav Pehlivanov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * AAC encoder Intensity Stereo
25  * @author Rostislav Pehlivanov ( atomnuker gmail com )
26  */
27 
28 #ifndef AVCODEC_AACENC_IS_H
29 #define AVCODEC_AACENC_IS_H
30 
31 #include "aacenc.h"
32 
33 /** Frequency in Hz for lower limit of intensity stereo **/
34 #define INT_STEREO_LOW_LIMIT 6100
35 
36 struct AACISError {
37  int pass; /* 1 if dist2 <= dist1 */
38  int phase; /* -1 or +1 */
39  float error; /* fabs(dist1 - dist2) */
40  float dist1; /* From original coeffs */
41  float dist2; /* From IS'd coeffs */
42  float ener01;
43 };
44 
46  int start, int w, int g, float ener0,
47  float ener1, float ener01,
48  int use_pcoeffs, int phase);
50 
51 #endif /* AVCODEC_AACENC_IS_H */
const char * s
Definition: avisynth_c.h:768
float dist2
Definition: aacenc_is.h:41
const char * g
Definition: vf_curves.c:112
void ff_aac_search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe)
Definition: aacenc_is.c:98
AAC encoder context.
Definition: aacenc.h:376
float ener01
Definition: aacenc_is.h:42
int pass
Definition: aacenc_is.h:37
float dist1
Definition: aacenc_is.h:40
float error
Definition: aacenc_is.h:39
int phase
Definition: aacenc_is.h:38
main external API structure.
Definition: avcodec.h:1502
channel element - generic struct for SCE/CPE/CCE/LFE
Definition: aac.h:275
void INT64 start
Definition: avisynth_c.h:690
struct AACISError ff_aac_is_encoding_err(AACEncContext *s, ChannelElement *cpe, int start, int w, int g, float ener0, float ener1, float ener01, int use_pcoeffs, int phase)
Definition: aacenc_is.c:33