#ifndef _TRAU_FRAME_H #define _TRAU_FRAME_H /* TRAU frame handling according to GSM TS 08.60 */ /* (C) 2009 by Harald Welte * All Rights Reserved * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . * */ #include #include /*! \defgroup trau_frame TRAU frame handling * @{ * * \file trau_frame.h */ /*! \brief Maximum number of C-bits in a TRAU frame: * 21 for FR/EFR, 25 for AMR, 15 for OM, 15 for data, 13 for E-data, 21 idle */ #define MAX_C_BITS 25 /*! \brief Maximum number of D-bits in a TRAU frame: * 260 for FR/EFR, 256 for AMR, 264 for OM, 288 for E-data */ #define MAX_D_BITS 288 /*! \brief Maximum number of T-bits in a TRAU frame for all speech frames */ #define MAX_T_BITS 4 /*! \brief Maximum number of S-bits in a TRAU frame for OM */ #define MAX_S_BITS 6 /*! \brief Maximum number of M-bits in a TRAU frame for E-data */ #define MAX_M_BITS 2 /*! \brief a decoded TRAU frame, extracted C/D/T/S/M bits */ struct decoded_trau_frame { ubit_t c_bits[MAX_C_BITS]; ubit_t d_bits[MAX_D_BITS]; ubit_t t_bits[MAX_T_BITS]; ubit_t s_bits[MAX_S_BITS]; ubit_t m_bits[MAX_M_BITS]; }; #define TRAU_FT_FR_UP 0x02 /* 0 0 0 1 0 - 3.5.1.1.1 */ #define TRAU_FT_FR_DOWN 0x1c /* 1 1 1 0 0 - 3.5.1.1.1 */ #define TRAU_FT_EFR 0x1a /* 1 1 0 1 0 - 3.5.1.1.1 */ #define TRAU_FT_AMR 0x06 /* 0 0 1 1 0 - 3.5.1.2 */ #define TRAU_FT_OM_UP 0x05 /* 0 0 1 0 1 - 3.5.2 */ #define TRAU_FT_OM_DOWN 0x1b /* 1 1 0 1 1 - 3.5.2 */ #define TRAU_FT_DATA_UP 0x08 /* 0 1 0 0 0 - 3.5.3 */ #define TRAU_FT_DATA_DOWN 0x16 /* 1 0 1 1 0 - 3.5.3 */ #define TRAU_FT_D145_SYNC 0x14 /* 1 0 1 0 0 - 3.5.3 */ #define TRAU_FT_EDATA 0x1f /* 1 1 1 1 1 - 3.5.4 */ #define TRAU_FT_IDLE_UP 0x10 /* 1 0 0 0 0 - 3.5.5 */ #define TRAU_FT_IDLE_DOWN 0x0e /* 0 1 1 1 0 - 3.5.5 */ int decode_trau_frame(struct decoded_trau_frame *fr, const ubit_t *trau_bits); int encode_trau_frame(ubit_t *trau_bits, const struct decoded_trau_frame *fr); int trau_frame_up2down(struct decoded_trau_frame *fr); ubit_t *trau_idle_frame(void); /* }@ */ #endif /* _TRAU_FRAME_H */