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authorMatthias P. Braendli <matthias.braendli@mpb.li>2016-11-04 14:27:50 +0100
committerMatthias P. Braendli <matthias.braendli@mpb.li>2016-11-04 14:27:50 +0100
commit51491533a312884862849082b3507e49c1829d22 (patch)
tree09afd1164350517eeacb53254b33db4249b1e41b /src/input/Udp.cpp
parent7068a697b235f1ae05bc1a5cf93e7eeefbe7a1df (diff)
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Add new UDP input
Diffstat (limited to 'src/input/Udp.cpp')
-rw-r--r--src/input/Udp.cpp134
1 files changed, 134 insertions, 0 deletions
diff --git a/src/input/Udp.cpp b/src/input/Udp.cpp
new file mode 100644
index 0000000..e534a06
--- /dev/null
+++ b/src/input/Udp.cpp
@@ -0,0 +1,134 @@
+/*
+ Copyright (C) 2009 Her Majesty the Queen in Right of Canada (Communications
+ Research Center Canada)
+
+ Copyright (C) 2016
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+ */
+/*
+ This file is part of ODR-DabMux.
+
+ ODR-DabMux 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.
+
+ ODR-DabMux 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 ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "input/Udp.h"
+
+#include <stdexcept>
+#include <sstream>
+#include <string.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <errno.h>
+#include "utils.h"
+
+using namespace std;
+
+namespace Inputs {
+
+int Udp::open(const std::string& name)
+{
+ // Skip the udp:// part if it is present
+ const string endpoint = (name.substr(0, 6) == "udp://") ?
+ name.substr(6) : name;
+
+ // The endpoint should be address:port
+ const auto colon_pos = endpoint.find_first_of(":");
+ if (colon_pos == string::npos) {
+ stringstream ss;
+ ss << "'" << name <<
+ " is an invalid format for udp address: "
+ "expected [udp://]address:port";
+ throw invalid_argument(ss.str());
+ }
+
+ const auto address = endpoint.substr(0, colon_pos);
+ const auto port_str = endpoint.substr(colon_pos + 1);
+
+ const long port = strtol(port_str.c_str(), nullptr, 10);
+
+ if ((port == LONG_MIN or port == LONG_MAX) and errno == ERANGE) {
+ throw out_of_range("udp input: port out of range");
+ }
+ else if (port == 0 and errno != 0) {
+ stringstream ss;
+ ss << "udp input port parse error: " << strerror(errno);
+ throw invalid_argument(ss.str());
+ }
+
+ if (port == 0) {
+ throw out_of_range("can't use port number 0 in udp address");
+ }
+
+ if (m_sock.reinit(port, address) == -1) {
+ stringstream ss;
+ ss << "Could not init UDP socket: " << inetErrMsg;
+ throw runtime_error(ss.str());
+ }
+
+ if (m_sock.setBlocking(false) == -1) {
+ stringstream ss;
+ ss << "Could not set non-blocking UDP socket: " << inetErrMsg;
+ throw runtime_error(ss.str());
+ }
+
+ return 0;
+}
+
+int Udp::readFrame(void* buffer, int size)
+{
+ uint8_t* data = reinterpret_cast<uint8_t*>(buffer);
+
+ // Regardless of buffer contents, try receiving data.
+ UdpPacket packet;
+ int ret = m_sock.receive(packet);
+
+ if (ret == -1) {
+ stringstream ss;
+ ss << "Could not read from UDP socket: " << inetErrMsg;
+ throw runtime_error(ss.str());
+ }
+
+ std::copy(packet.getData(), packet.getData() + packet.getSize(),
+ back_inserter(m_buffer));
+
+ // Take data from the buffer if it contains enough data,
+ // in any case write the buffer
+ if (m_buffer.size() >= (size_t)size) {
+ std::copy(m_buffer.begin(), m_buffer.begin() + size, data);
+ }
+ else {
+ memset(data, 0x0, size);
+ }
+
+ return size;
+}
+
+int Udp::setBitrate(int bitrate)
+{
+ if (bitrate <= 0) {
+ etiLog.log(error, "Invalid bitrate (%i)\n", bitrate);
+ return -1;
+ }
+
+ return bitrate;
+}
+
+int Udp::close()
+{
+ return m_sock.close();
+}
+
+};