Harald Welte | 54bd94d | 2009-01-05 19:00:01 +0000 | [diff] [blame^] | 1 | #ifndef _SUBCH_DEMUX_H |
| 2 | #define _SUBCH_DEMUX_H |
| 3 | /* A E1 sub-channel demultiplexer with TRAU frame sync */ |
| 4 | |
| 5 | /* (C) 2009 by Harald Welte <laforge@gnumonks.org> |
| 6 | * All Rights Reserved |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <sys/types.h> |
| 25 | |
| 26 | #define NR_SUBCH 4 |
| 27 | #define TRAU_FRAME_SIZE 40 |
| 28 | #define TRAU_FRAME_BITS (TRAU_FRAME_SIZE*8) |
| 29 | |
| 30 | struct subch { |
| 31 | u_int8_t out_bitbuf[TRAU_FRAME_BITS]; |
| 32 | u_int8_t out_idx; /* next bit to be written in out_bitbuf */ |
| 33 | }; |
| 34 | |
| 35 | struct subch_demux { |
| 36 | u_int8_t chan_activ; |
| 37 | struct subch subch[NR_SUBCH]; |
| 38 | int (*out_cb)(struct subch_demux *dmx, int ch, u_int8_t *data, int len, |
| 39 | void *); |
| 40 | void *data; |
| 41 | }; |
| 42 | |
| 43 | int subch_demux_in(struct subch_demux *dmx, u_int8_t *data, int len); |
| 44 | int subch_demux_activate(struct subch_demux *dmx, int subch); |
| 45 | int subch_demux_deactivate(struct subch_demux *dmx, int subch); |
| 46 | #endif /* _SUBCH_DEMUX_H */ |