2 * AAC encoder intensity stereo
3 * Copyright (C) 2015 Rostislav Pehlivanov
5 * This file is part of FFmpeg.
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.
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.
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
24 * AAC encoder Intensity Stereo
25 * @author Rostislav Pehlivanov ( atomnuker gmail com )
28 #ifndef AVCODEC_AACENC_IS_H
29 #define AVCODEC_AACENC_IS_H
33 /** Frequency in Hz for lower limit of intensity stereo **/
34 #define INT_STEREO_LOW_LIMIT 6100
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 */
45 struct AACISError ff_aac_is_encoding_err(AACEncContext *s, ChannelElement *cpe,
46 int start, int w, int g, float ener0,
47 float ener1, float ener01,
48 int use_pcoeffs, int phase);
49 void ff_aac_search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
51 #endif /* AVCODEC_AACENC_IS_H */