| #ifndef _TRAU_FRAME_H |
| #define _TRAU_FRAME_H |
| /* TRAU frame handling according to GSM TS 08.60 */ |
| |
| /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| * 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 <http://www.gnu.org/licenses/>. |
| * |
| */ |
| |
| #include <stdint.h> |
| |
| /*! \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 { |
| uint8_t c_bits[MAX_C_BITS]; |
| uint8_t d_bits[MAX_D_BITS]; |
| uint8_t t_bits[MAX_T_BITS]; |
| uint8_t s_bits[MAX_S_BITS]; |
| uint8_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 0x07 /* 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 uint8_t *trau_bits); |
| int encode_trau_frame(uint8_t *trau_bits, const struct decoded_trau_frame *fr); |
| int trau_frame_up2down(struct decoded_trau_frame *fr); |
| |
| uint8_t *trau_idle_frame(void); |
| |
| /* }@ */ |
| |
| #endif /* _TRAU_FRAME_H */ |