path: root/libavcodec/aacenc_pred.h (plain)
blob: aa305f45a5dc38530319f928e30bda6b715fcff3

1	/*
2	* AAC encoder main-type prediction
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 main-type prediction
25	* @author Rostislav Pehlivanov ( atomnuker gmail com )
26	*/
27
28	#ifndef AVCODEC_AACENC_PRED_H
29	#define AVCODEC_AACENC_PRED_H
30
31	#include "aacenc.h"
32
33	/* Every predictor group needs to get reset at least once in this many frames */
34	#define PRED_RESET_FRAME_MIN 240
35
36	/* Any frame with less than this amount of frames since last reset is ok */
37	#define PRED_RESET_MIN 64
38
39	/* Raise to filter any low frequency artifacts due to prediction */
40	#define PRED_SFB_START 10
41
42	void ff_aac_apply_main_pred(AACEncContext *s, SingleChannelElement *sce);
43	void ff_aac_adjust_common_pred(AACEncContext *s, ChannelElement *cpe);
44	void ff_aac_search_for_pred(AACEncContext *s, SingleChannelElement *sce);
45	void ff_aac_encode_main_pred(AACEncContext *s, SingleChannelElement *sce);
46
47	#endif /* AVCODEC_AACENC_PRED_H */
48