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Diffstat (limited to 'libavcodec/aacenc_pred.h')
-rw-r--r-- | libavcodec/aacenc_pred.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libavcodec/aacenc_pred.h b/libavcodec/aacenc_pred.h new file mode 100644 index 0000000000..dc93c827fc --- /dev/null +++ b/libavcodec/aacenc_pred.h @@ -0,0 +1,51 @@ +/* + * AAC encoder main-type prediction + * 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 main prediction + * @author Rostislav Pehlivanov ( atomnuker gmail com ) + */ + +#ifndef AVCODEC_AACENC_PRED_H +#define AVCODEC_AACENC_PRED_H + +#include "aacenc.h" + +/* Every predictor group needs to get reset at least once in this many frames */ +#define PRED_RESET_FRAME_MIN 240 + +/* Any frame with less than this amount of frames since last reset is ok */ +#define PRED_RESET_MIN 128 + +/* Raise to filter any low frequency artifacts due to prediction */ +#define PRED_SFB_START 10 + +/* Offset for the number of bits to encode normal coefficients */ +#define PRICE_OFFSET 440 + +void apply_main_pred(AACEncContext *s, SingleChannelElement *sce); +void update_main_pred(AACEncContext *s, SingleChannelElement *sce, ChannelElement *cpe); +void adjust_common_prediction(AACEncContext *s, ChannelElement *cpe); +void search_for_pred(AACEncContext *s, SingleChannelElement *sce); +void encode_main_pred(AACEncContext *s, SingleChannelElement *sce); + +#endif /* AVCODEC_AACENC_PRED_H */ |