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Diffstat (limited to 'gr-digital/include/digital_framer_sink_1.h')
| -rw-r--r-- | gr-digital/include/digital_framer_sink_1.h | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/gr-digital/include/digital_framer_sink_1.h b/gr-digital/include/digital_framer_sink_1.h deleted file mode 100644 index bb82bf5a7..000000000 --- a/gr-digital/include/digital_framer_sink_1.h +++ /dev/null @@ -1,107 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2005,2006,2012 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio 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 3, or (at your option) - * any later version. - * - * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, - * Boston, MA 02110-1301, USA. - */ - -#ifndef INCLUDED_GR_FRAMER_SINK_1_H -#define INCLUDED_GR_FRAMER_SINK_1_H - -#include <digital_api.h> -#include <gr_sync_block.h> -#include <gr_msg_queue.h> - -class digital_framer_sink_1; -typedef boost::shared_ptr<digital_framer_sink_1> digital_framer_sink_1_sptr; - -DIGITAL_API digital_framer_sink_1_sptr -digital_make_framer_sink_1(gr_msg_queue_sptr target_queue); - -/*! - * \brief Given a stream of bits and access_code flags, assemble packets. - * \ingroup sink_blk - * - * input: stream of bytes from gr_correlate_access_code_bb - * output: none. Pushes assembled packet into target queue - * - * The framer expects a fixed length header of 2 16-bit shorts - * containing the payload length, followed by the payload. If the - * 2 16-bit shorts are not identical, this packet is ignored. Better - * algs are welcome. - * - * The input data consists of bytes that have two bits used. - * Bit 0, the LSB, contains the data bit. - * Bit 1 if set, indicates that the corresponding bit is the - * the first bit of the packet. That is, this bit is the first - * one after the access code. - */ -class DIGITAL_API digital_framer_sink_1 : public gr_sync_block -{ - friend DIGITAL_API digital_framer_sink_1_sptr - digital_make_framer_sink_1(gr_msg_queue_sptr target_queue); - - private: - enum state_t {STATE_SYNC_SEARCH, STATE_HAVE_SYNC, STATE_HAVE_HEADER}; - - static const int MAX_PKT_LEN = 4096; - static const int HEADERBITLEN = 32; - - gr_msg_queue_sptr d_target_queue; // where to send the packet when received - state_t d_state; - unsigned int d_header; // header bits - int d_headerbitlen_cnt; // how many so far - - unsigned char d_packet[MAX_PKT_LEN]; // assembled payload - unsigned char d_packet_byte; // byte being assembled - int d_packet_byte_index; // which bit of d_packet_byte we're working on - int d_packetlen; // length of packet - int d_packet_whitener_offset; // offset into whitener string to use - int d_packetlen_cnt; // how many so far - - protected: - digital_framer_sink_1(gr_msg_queue_sptr target_queue); - - void enter_search(); - void enter_have_sync(); - void enter_have_header(int payload_len, int whitener_offset); - - bool header_ok() - { - // confirm that two copies of header info are identical - return ((d_header >> 16) ^ (d_header & 0xffff)) == 0; - } - - void header_payload(int *len, int *offset) - { - // header consists of two 16-bit shorts in network byte order - // payload length is lower 12 bits - // whitener offset is upper 4 bits - *len = (d_header >> 16) & 0x0fff; - *offset = (d_header >> 28) & 0x000f; - } - - public: - ~digital_framer_sink_1(); - - int work(int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items); -}; - -#endif /* INCLUDED_GR_FRAMER_SINK_1_H */ |