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76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
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/*---------------------------------------------------------------------------*\
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FILE........: freedv_data_channel.h
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AUTHOR......: Jeroen Vreeken
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DATE CREATED: 03 March 2016
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Data channel for ethernet like packets in freedv VHF frames.
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Currently designed for-
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* 2 control bits per frame
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* 4 byte counter bits per frame
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* 64 bits of data per frame
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2016 Jeroen Vreeken
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All rights reserved.
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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 Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _FREEDV_DATA_CHANNEL_H
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#define _FREEDV_DATA_CHANNEL_H
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#include <stdlib.h>
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#define FREEDV_DATA_CHANNEL_PACKET_MAX 2048
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namespace FreeDV
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{
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typedef void (*freedv_data_callback_rx)(void *, unsigned char *packet, size_t size);
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typedef void (*freedv_data_callback_tx)(void *, unsigned char *packet, size_t *size);
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struct freedv_data_channel {
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freedv_data_callback_rx cb_rx;
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void *cb_rx_state;
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freedv_data_callback_tx cb_tx;
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void *cb_tx_state;
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unsigned char rx_header[8];
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unsigned char packet_rx[FREEDV_DATA_CHANNEL_PACKET_MAX + 2];
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int packet_rx_cnt;
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unsigned char tx_header[8];
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unsigned char packet_tx[FREEDV_DATA_CHANNEL_PACKET_MAX + 2];
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int packet_tx_cnt;
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size_t packet_tx_size;
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};
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struct freedv_data_channel *freedv_data_channel_create(void);
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void freedv_data_channel_destroy(struct freedv_data_channel *fdc);
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void freedv_data_set_cb_rx(struct freedv_data_channel *fdc, freedv_data_callback_rx cb, void *state);
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void freedv_data_set_cb_tx(struct freedv_data_channel *fdc, freedv_data_callback_tx cb, void *state);
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void freedv_data_channel_rx_frame(struct freedv_data_channel *fdc, unsigned char *data, size_t size, int from_bit, int bcast_bit, int crc_bit, int end_bits);
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void freedv_data_channel_tx_frame(struct freedv_data_channel *fdc, unsigned char *data, size_t size, int *from_bit, int *bcast_bit, int *crc_bit, int *end_bits);
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void freedv_data_set_header(struct freedv_data_channel *fdc, unsigned char *header);
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int freedv_data_get_n_tx_frames(struct freedv_data_channel *fdc, size_t size);
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} // FreeDV
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#endif /* _FREEDV_DATA_CHANNEL_H */
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