libavcodec/aacsbr.h

   1 /*
   2  * AAC Spectral Band Replication function declarations
   3  * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
   4  * Copyright (c) 2010      Alex Converse <alex.converse@gmail.com>
   5  *
   6  * This file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * AAC Spectral Band Replication function declarations
  26  * @author Robert Swain ( rob opendot cl )
  27  */
  28
  29 #ifndef AVCODEC_AACSBR_H
  30 #define AVCODEC_AACSBR_H
  31
  32 #include "get_bits.h"
  33 #include "aac.h"
  34 #include "sbr.h"
  35
  36 /** Initialize SBR. */
  37 av_cold void ff_aac_sbr_init(void);
  38 /** Initialize one SBR context. */
  39 av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr);
  40 /** Close one SBR context. */
  41 av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr);
  42 /** Decode one SBR element. */
  43 int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr,
  44                             GetBitContext *gb, int crc, int cnt, int id_aac);
  45 /** Apply one SBR element to one AAC element. */
  46 void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
  47                   float* L, float *R);
  48
  49 #endif /* AVCODEC_AACSBR_H */