From 520626bcc203a15ec22ed7351204662a33a17ef5 Mon Sep 17 00:00:00 2001
From: Tom Rondeau <trondeau@vt.edu>
Date: Wed, 6 Mar 2013 09:54:14 -0500
Subject: blocks: moving message blocks to gr-blocks.
message_burst_source, message_source, message_sink, message_debug, message_strobe.
---
gr-blocks/lib/message_burst_source_impl.cc | 149 +++++++++++++++++++++++++++++
1 file changed, 149 insertions(+)
create mode 100644 gr-blocks/lib/message_burst_source_impl.cc
(limited to 'gr-blocks/lib/message_burst_source_impl.cc')
diff --git a/gr-blocks/lib/message_burst_source_impl.cc b/gr-blocks/lib/message_burst_source_impl.cc
new file mode 100644
index 0000000000..f3c90eda31
--- /dev/null
+++ b/gr-blocks/lib/message_burst_source_impl.cc
@@ -0,0 +1,149 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2012-2013 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "message_burst_source_impl.h"
+#include <gr_io_signature.h>
+#include <cstdio>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdexcept>
+#include <string.h>
+#include <gr_tags.h>
+
+namespace gr {
+ namespace blocks {
+
+ message_burst_source::sptr
+ message_burst_source::make(size_t itemsize, int msgq_limit)
+ {
+ return gnuradio::get_initial_sptr
+ (new message_burst_source_impl(itemsize, msgq_limit));
+ }
+
+ message_burst_source::sptr
+ message_burst_source::make(size_t itemsize, gr_msg_queue_sptr msgq)
+ {
+ return gnuradio::get_initial_sptr
+ (new message_burst_source_impl(itemsize, msgq));
+ }
+
+ message_burst_source_impl::message_burst_source_impl(size_t itemsize, int msgq_limit)
+ : gr_sync_block("message_burst_source",
+ gr_make_io_signature(0, 0, 0),
+ gr_make_io_signature(1, 1, itemsize)),
+ d_itemsize(itemsize), d_msgq(gr_make_msg_queue(msgq_limit)),
+ d_msg_offset(0), d_eof(false)
+ {
+ std::stringstream id;
+ id << name() << unique_id();
+ d_me = pmt::pmt_string_to_symbol(id.str());
+ }
+
+ message_burst_source_impl::message_burst_source_impl(size_t itemsize, gr_msg_queue_sptr msgq)
+ : gr_sync_block("message_burst_source",
+ gr_make_io_signature(0, 0, 0),
+ gr_make_io_signature(1, 1, itemsize)),
+ d_itemsize(itemsize), d_msgq(msgq),
+ d_msg_offset(0), d_eof(false)
+ {
+ std::stringstream id;
+ id << name() << unique_id();
+ d_me = pmt::pmt_string_to_symbol(id.str());
+ }
+
+ message_burst_source_impl::~message_burst_source_impl()
+ {
+ }
+
+ int
+ message_burst_source_impl::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ char *out = (char*)output_items[0];
+ int nn = 0;
+
+ uint64_t abs_sample_count = nitems_written(0);
+
+ while(nn < noutput_items) {
+ if(d_msg) {
+ //
+ // Consume whatever we can from the current message
+ //
+
+ int mm = std::min(noutput_items - nn,
+ (int)((d_msg->length() - d_msg_offset) / d_itemsize));
+ memcpy(out, &(d_msg->msg()[d_msg_offset]), mm * d_itemsize);
+
+ nn += mm;
+ out += mm * d_itemsize;
+ d_msg_offset += mm * d_itemsize;
+ assert(d_msg_offset <= d_msg->length());
+
+ if(d_msg_offset == d_msg->length()) {
+ if(d_msg->type() == 1) // type == 1 sets EOF
+ d_eof = true;
+ d_msg.reset();
+ //tag end of burst
+ add_item_tag(0, //stream ID
+ abs_sample_count+nn-1, //sample number
+ pmt::pmt_string_to_symbol("tx_eob"),
+ pmt::pmt_from_bool(1),
+ d_me); //block src id
+ }
+ }
+ else {
+ //
+ // No current message
+ //
+ if(d_msgq->empty_p() && nn > 0) { // no more messages in the queue, return what we've got
+ break;
+ }
+
+ if(d_eof)
+ return -1;
+
+ d_msg = d_msgq->delete_head(); // block, waiting for a message
+ d_msg_offset = 0;
+ //tag start of burst
+ add_item_tag(0, //stream ID
+ abs_sample_count+nn, //sample number
+ pmt::pmt_string_to_symbol("tx_sob"),
+ pmt::pmt_from_bool(1),
+ d_me); //block src id
+
+ if((d_msg->length() % d_itemsize) != 0)
+ throw std::runtime_error("msg length is not a multiple of d_itemsize");
+ }
+ }
+
+ return nn;
+ }
+
+ } /* namespace blocks */
+} /* namespace gr */
--
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