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a16577d985
This is essentially a MS GSM decoder extension that supports more sampling rates and lower bitrates. Signed-off-by: Anton Khirnov <anton@khirnov.net>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
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* gsm 06.10 decoder data
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* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVCODEC_GSMDEC_DATA_H
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#define AVCODEC_GSMDEC_DATA_H
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#include <stdint.h>
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#include "avcodec.h"
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typedef struct GSMContext {
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// Contains first 120 elements from the previous frame
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// (used by long_term_synth according to the "lag"),
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// then in the following 160 elements the current
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// frame is constructed.
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int16_t ref_buf[280];
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int v[9];
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int lar[2][8];
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int lar_idx;
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int msr;
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} GSMContext;
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extern const uint16_t ff_gsm_long_term_gain_tab[4];
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extern const int16_t ff_gsm_dequant_tab[64][8];
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extern const int* const ff_gsm_apcm_bits[][4];
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#endif /* AVCODEC_GSMDEC_DATA_H */
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