| #ifndef _SUBCH_DEMUX_H |
| #define _SUBCH_DEMUX_H |
| /* A E1 sub-channel demultiplexer with TRAU frame sync */ |
| |
| /* (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 General Public License as published by |
| * the Free Software Foundation; either version 2 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| |
| #include <sys/types.h> |
| |
| #define NR_SUBCH 4 |
| #define TRAU_FRAME_SIZE 40 |
| #define TRAU_FRAME_BITS (TRAU_FRAME_SIZE*8) |
| |
| struct subch { |
| u_int8_t out_bitbuf[TRAU_FRAME_BITS]; |
| u_int8_t out_idx; /* next bit to be written in out_bitbuf */ |
| }; |
| |
| struct subch_demux { |
| u_int8_t chan_activ; |
| struct subch subch[NR_SUBCH]; |
| int (*out_cb)(struct subch_demux *dmx, int ch, u_int8_t *data, int len, |
| void *); |
| void *data; |
| }; |
| |
| int subch_demux_init(struct subch_demux *dmx); |
| int subch_demux_in(struct subch_demux *dmx, u_int8_t *data, int len); |
| int subch_demux_activate(struct subch_demux *dmx, int subch); |
| int subch_demux_deactivate(struct subch_demux *dmx, int subch); |
| #endif /* _SUBCH_DEMUX_H */ |