From 5d965e80be2e6ab62bc82fb2e0d4d472153ad241 Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli (think)" <matthias@mpb.li>
Date: Sun, 10 Nov 2013 21:50:12 +0100
Subject: crc-dabmod: add ZeroMQ input module

---
 src/InputZeroMQReader.cpp | 135 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 src/InputZeroMQReader.cpp

(limited to 'src/InputZeroMQReader.cpp')

diff --git a/src/InputZeroMQReader.cpp b/src/InputZeroMQReader.cpp
new file mode 100644
index 0000000..e689e4c
--- /dev/null
+++ b/src/InputZeroMQReader.cpp
@@ -0,0 +1,135 @@
+/*
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
+   Her Majesty the Queen in Right of Canada (Communications Research
+   Center Canada)
+
+   Copyrigth (C) 2013
+   Matthias P. Braendli, matthias.braendli@mpb.li
+ */
+/*
+   This file is part of CRC-DADMOD.
+
+   CRC-DADMOD 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 of the
+   License, or (at your option) any later version.
+
+   CRC-DADMOD 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 CRC-DADMOD.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+#if defined(HAVE_INPUT_ZEROMQ)
+
+#include <string>
+#include <cstring>
+#include <cstdio>
+#include <stdint.h>
+#include <zmq.hpp>
+#include <boost/thread/thread.hpp>
+#include "porting.h"
+#include "InputReader.h"
+#include "PcDebug.h"
+
+#define MAX_QUEUE_SIZE 50
+
+int InputZeroMQReader::Open(std::string uri)
+{
+    uri_ = uri;
+    workerdata_.uri = uri;
+    // launch receiver thread
+    worker_.Start(&workerdata_);
+
+    return 0;
+}
+
+int InputZeroMQReader::GetNextFrame(void* buffer)
+{
+    zmq::message_t* incoming;
+    in_messages_.wait_and_pop(incoming);
+
+    size_t framesize = incoming->size();
+
+    // guarantee that we never will write more than 6144 bytes
+    if (framesize > 6144) {
+        fprintf(stderr, "ZeroMQ message too large: %zu!\n", framesize);
+        logger_.level(error) << "ZeroMQ message too large" << framesize;
+        return -1;
+    }
+
+    memcpy(buffer, incoming->data(), framesize);
+
+    delete incoming;
+
+    // pad to 6144 bytes
+    memset(&((uint8_t*)buffer)[framesize], 0x55, 6144 - framesize);
+
+
+    return 6144;
+}
+
+void InputZeroMQReader::PrintInfo()
+{
+    fprintf(stderr, "Input ZeroMQ:\n");
+    fprintf(stderr, "  Receiving from %s\n\n", uri_.c_str());
+}
+
+// ------------- Worker functions
+
+void InputZeroMQWorker::RecvProcess(struct InputZeroMQThreadData* workerdata)
+{
+    size_t queue_size = 0;
+
+    try {
+        subscriber.connect(workerdata->uri.c_str());
+
+        subscriber.setsockopt(ZMQ_SUBSCRIBE, NULL, 0); // subscribe to all messages
+
+        while (running)
+        {
+            zmq::message_t incoming;
+            subscriber.recv(&incoming);
+
+            if (queue_size < MAX_QUEUE_SIZE) {
+                zmq::message_t* holder = new zmq::message_t();
+                holder->move(&incoming); // move the message into the holder
+                queue_size = workerdata->in_messages->push(holder);
+            }
+            else
+            {
+                workerdata->in_messages->notify();
+                fprintf(stderr, "ZeroMQ message overfull: %zu elements !\n", queue_size);
+            }
+
+            if (queue_size < 5) {
+                fprintf(stderr, "ZeroMQ message underfull: %zu elements !\n", queue_size);
+            }
+        }
+    }
+    catch ( zmq::error_t err ) {
+        printf("ZeroMQ error in RecvProcess: '%s'\n", err.what());
+    }
+}
+
+void InputZeroMQWorker::Start(struct InputZeroMQThreadData* workerdata)
+{
+    running = true;
+    recv_thread = boost::thread(&InputZeroMQWorker::RecvProcess, this, workerdata);
+}
+
+void InputZeroMQWorker::Stop()
+{
+    subscriber.close();
+    running = false;
+}
+
+#endif
+
-- 
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