66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
#ifndef _TRAU_FRAME_H
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#define _TRAU_FRAME_H
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/* TRAU frame handling according to GSM TS 08.60 */
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/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#include <sys/types.h>
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/* 21 for FR/EFR, 25 for AMR, 15 for OM, 15 for data, 13 for E-data, 21 idle */
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#define MAX_C_BITS 25
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/* 260 for FR/EFR, 256 for AMR, 264 for OM, 288 for E-data */
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#define MAX_D_BITS 288
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/* for all speech frames */
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#define MAX_T_BITS 4
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/* for OM */
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#define MAX_S_BITS 6
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/* for E-data */
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#define MAX_M_BITS 2
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struct decoded_trau_frame {
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u_int8_t c_bits[MAX_C_BITS];
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u_int8_t d_bits[MAX_D_BITS];
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u_int8_t t_bits[MAX_T_BITS];
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u_int8_t s_bits[MAX_S_BITS];
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u_int8_t m_bits[MAX_M_BITS];
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};
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#define TRAU_FT_FR_UP 0x02 /* 0 0 0 1 0 - 3.5.1.1.1 */
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#define TRAU_FT_FR_DOWN 0x1c /* 1 1 1 0 0 - 3.5.1.1.1 */
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#define TRAU_FT_EFR 0x1a /* 1 1 0 1 0 - 3.5.1.1.1 */
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#define TRAU_FT_AMR 0x06 /* 0 0 1 1 0 - 3.5.1.2 */
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#define TRAU_FT_OM_UP 0x07 /* 0 0 1 0 1 - 3.5.2 */
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#define TRAU_FT_OM_DOWN 0x1b /* 1 1 0 1 1 - 3.5.2 */
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#define TRAU_FT_DATA_UP 0x08 /* 0 1 0 0 0 - 3.5.3 */
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#define TRAU_FT_DATA_DOWN 0x16 /* 1 0 1 1 0 - 3.5.3 */
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#define TRAU_FT_D145_SYNC 0x14 /* 1 0 1 0 0 - 3.5.3 */
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#define TRAU_FT_EDATA 0x1f /* 1 1 1 1 1 - 3.5.4 */
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#define TRAU_FT_IDLE_UP 0x10 /* 1 0 0 0 0 - 3.5.5 */
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#define TRAU_FT_IDLE_DOWN 0x0e /* 0 1 1 1 0 - 3.5.5 */
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int decode_trau_frame(struct decoded_trau_frame *fr, const u_int8_t *trau_bits);
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int encode_trau_frame(u_int8_t *trau_bits, const struct decoded_trau_frame *fr);
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int trau_frame_up2down(struct decoded_trau_frame *fr);
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u_int8_t *trau_idle_frame(void);
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#endif /* _TRAU_FRAME_H */
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