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52 lines
1.9 KiB
52 lines
1.9 KiB
15 years ago
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/*
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* AAC Spectral Band Replication function declarations
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* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
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* Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file libavcodec/aacsbr.h
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* AAC Spectral Band Replication function declarations
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* @author Robert Swain ( rob opendot cl )
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*/
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#ifndef AVCODEC_AACSBR_H
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#define AVCODEC_AACSBR_H
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#include "get_bits.h"
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#include "aac.h"
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#include "sbr.h"
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/** Initialize SBR. */
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av_cold void ff_aac_sbr_init(void);
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/** Initialize one SBR context. */
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av_cold void ff_aac_sbr_ctx_init(SpectralBandReplication *sbr);
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/** Close one SBR context. */
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av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr);
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/** Decode one SBR element. */
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int ff_decode_sbr_extension(AACContext *ac, SpectralBandReplication *sbr,
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GetBitContext *gb, int crc, int cnt, int id_aac);
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/** Dequantized all channels in one SBR element. */
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void ff_sbr_dequant(AACContext *ac, SpectralBandReplication *sbr, int id_aac);
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/** Apply dequantized SBR to a single AAC channel. */
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void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int ch,
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const float* in, float* out);
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#endif /* AVCODEC_AACSBR_H */
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