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- /*
- * AAC encoder intensity stereo
- * Copyright (C) 2015 Rostislav Pehlivanov
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
- /**
- * @file
- * AAC encoder Intensity Stereo
- * @author Rostislav Pehlivanov ( atomnuker gmail com )
- */
- #ifndef AVCODEC_AACENC_IS_H
- #define AVCODEC_AACENC_IS_H
- #include "aacenc.h"
- /** Frequency in Hz for lower limit of intensity stereo **/
- #define INT_STEREO_LOW_LIMIT 6100
- struct AACISError {
- int pass; /* 1 if dist2 <= dist1 */
- int phase; /* -1 or +1 */
- float error; /* fabs(dist1 - dist2) */
- float dist1; /* From original coeffs */
- float dist2; /* From IS'd coeffs */
- float ener01;
- };
- 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);
- void ff_aac_search_for_is(AACEncContext *s, AVCodecContext *avctx, ChannelElement *cpe);
- #endif /* AVCODEC_AACENC_IS_H */
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