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-rw-r--r--src/dabOutput/dabOutput.h18
-rw-r--r--src/dabOutput/dabOutputZMQ.cpp24
-rw-r--r--src/dabOutput/metadata.cpp70
-rw-r--r--src/dabOutput/metadata.h79
4 files changed, 184 insertions, 7 deletions
diff --git a/src/dabOutput/dabOutput.h b/src/dabOutput/dabOutput.h
index 2e5f489..58a2929 100644
--- a/src/dabOutput/dabOutput.h
+++ b/src/dabOutput/dabOutput.h
@@ -45,6 +45,7 @@
#ifdef HAVE_OUTPUT_ZEROMQ
# include "zmq.hpp"
#endif
+#include "dabOutput/metadata.h"
/** Configuration for EDI output */
@@ -89,6 +90,8 @@ class DabOutput
virtual ~DabOutput() {}
virtual std::string get_info() const = 0;
+
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) = 0;
};
// ----- used in File and Fifo outputs
@@ -117,6 +120,7 @@ class DabOutputFile : public DabOutput
return "file://" + filename_;
}
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) {}
protected:
/* Set ETI type according to filename, and return
* filename without the &type=foo part
@@ -176,6 +180,7 @@ class DabOutputRaw : public DabOutput
std::string get_info() const {
return "raw://" + filename_;
}
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) {}
private:
std::string filename_;
int socket_;
@@ -204,6 +209,7 @@ class DabOutputUdp : public DabOutput
std::string get_info() const {
return "udp://" + uri_;
}
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) {}
private:
// make sure we don't copy this output around
// the UdpPacket and UdpSocket do not support
@@ -228,7 +234,7 @@ class DabOutputTcp : public DabOutput
std::string get_info() const {
return "tcp://" + uri_;
}
-
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) {}
private:
std::string uri_;
@@ -246,6 +252,7 @@ class DabOutputSimul : public DabOutput
std::string get_info() const {
return "simul://" + name_;
}
+ virtual void setMetadata(std::shared_ptr<OutputMetadata> &md) {}
private:
std::string name_;
std::chrono::steady_clock::time_point startTime_;
@@ -286,6 +293,10 @@ struct zmq_dab_message_t
*/
uint8_t buf[NUM_FRAMES_PER_ZMQ_MESSAGE*6144];
+
+ /* The packet is then followed with metadata appended to it,
+ * according to dabOutput/metadata.h
+ */
};
#define ZMQ_DAB_MESSAGE_HEAD_LENGTH (4 + NUM_FRAMES_PER_ZMQ_MESSAGE*2)
@@ -316,8 +327,9 @@ class DabOutputZMQ : public DabOutput
int Open(const char* endpoint);
int Write(void* buffer, int size);
int Close();
- private:
+ void setMetadata(std::shared_ptr<OutputMetadata> &md);
+ private:
std::string endpoint_;
std::string zmq_proto_;
zmq::context_t zmq_context_; // handle for the zmq context
@@ -325,6 +337,8 @@ class DabOutputZMQ : public DabOutput
zmq_dab_message_t zmq_message;
int zmq_message_ix;
+
+ std::vector<std::shared_ptr<OutputMetadata> > meta_;
};
#endif
diff --git a/src/dabOutput/dabOutputZMQ.cpp b/src/dabOutput/dabOutputZMQ.cpp
index 6a9d669..582af80 100644
--- a/src/dabOutput/dabOutputZMQ.cpp
+++ b/src/dabOutput/dabOutputZMQ.cpp
@@ -88,19 +88,28 @@ int DabOutputZMQ::Write(void* buffer, int size)
if (zmq_message_ix == NUM_FRAMES_PER_ZMQ_MESSAGE) {
// Size of the header:
- int full_length = ZMQ_DAB_MESSAGE_HEAD_LENGTH;
+ size_t full_length = ZMQ_DAB_MESSAGE_HEAD_LENGTH;
for (int i = 0; i < NUM_FRAMES_PER_ZMQ_MESSAGE; i++) {
full_length += zmq_message.buflen[i];
}
- zmq_message_ix = 0;
+ vector<uint8_t> msg(full_length);
+ memcpy(msg.data(), (uint8_t*)&zmq_message, full_length);
+
+ // metadata gets appended at the end
+ for (const auto& md : meta_) {
+ vector<uint8_t> md_data(md->getLength());
+ md->write(md_data.data());
+
+ copy(md_data.begin(), md_data.end(), back_inserter(msg));
+ }
const int flags = 0;
- zmq_send(zmq_pub_sock_,
- (uint8_t*)&zmq_message,
- full_length, flags);
+ zmq_send(zmq_pub_sock_, msg.data(), msg.size(), flags);
+ meta_.clear();
+ zmq_message_ix = 0;
for (int i = 0; i < NUM_FRAMES_PER_ZMQ_MESSAGE; i++) {
zmq_message.buflen[i] = -1;
}
@@ -115,5 +124,10 @@ int DabOutputZMQ::Close()
return zmq_close(zmq_pub_sock_);
}
+void DabOutputZMQ::setMetadata(std::shared_ptr<OutputMetadata> &md)
+{
+ meta_.push_back(md);
+}
+
#endif
diff --git a/src/dabOutput/metadata.cpp b/src/dabOutput/metadata.cpp
new file mode 100644
index 0000000..6dfd65c
--- /dev/null
+++ b/src/dabOutput/metadata.cpp
@@ -0,0 +1,70 @@
+/*
+ Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
+ Right of Canada (Communications Research Center Canada)
+
+ Copyright (C) 2017
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+
+ The metadata support for the outputs.
+*/
+/*
+ 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 "dabOutput/metadata.h"
+#include <cstring>
+#include <arpa/inet.h>
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+template <typename T>
+size_t write_meta(output_metadata_id_e md, uint8_t *buf, T value)
+{
+ buf[0] = static_cast<uint8_t>(md);
+
+ const int16_t len_value = sizeof(T);
+
+ const uint16_t data_length = htons(len_value);
+ memcpy(buf + 1, &data_length, sizeof(data_length));
+
+ if (len_value == 1) {
+ buf[3] = value;
+ }
+ else if (len_value == 2) {
+ const uint16_t value = htons(value);
+ memcpy(buf + 3, &value, sizeof(value));
+ }
+ else if (len_value == 4) {
+ const uint32_t value = htons(value);
+ memcpy(buf + 3, &value, sizeof(value));
+ }
+
+ return 3 + len_value;
+}
+
+size_t OutputMetadataUTCO::write(uint8_t *buf)
+{
+ return write_meta(getId(), buf, utco);
+}
+
+size_t OutputMetadataEDITime::write(uint8_t *buf)
+{
+ return write_meta(getId(), buf, seconds);
+}
diff --git a/src/dabOutput/metadata.h b/src/dabOutput/metadata.h
new file mode 100644
index 0000000..e250938
--- /dev/null
+++ b/src/dabOutput/metadata.h
@@ -0,0 +1,79 @@
+/*
+ Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
+ Right of Canada (Communications Research Center Canada)
+
+ Copyright (C) 2017
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://www.opendigitalradio.org
+
+ The metadata support for the outputs.
+*/
+/*
+ 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/>.
+ */
+
+#pragma once
+#include "Log.h"
+
+/* Some outputs support additional metadata to be carried
+ * next to the main ETI stream. This metadata always has the
+ * following format:
+ * Field: | id | len | value |
+ * Length: 1 2 depending on id
+ *
+ * Multi-byte values are transmitted in network byte order.
+ */
+
+enum class output_metadata_id_e {
+ // TAI-UTC offset, value is int16_t.
+ utc_offset = 1,
+
+ /* EDI Time is the number of SI seconds since 2000-01-01 T 00:00:00 UTC.
+ * value is an uint32_t */
+ edi_time = 2,
+};
+
+struct OutputMetadata {
+ virtual output_metadata_id_e getId(void) const = 0;
+ virtual size_t getLength(void) const = 0;
+
+ /* Write the value in the metadata format to the buffer.
+ * Returns number of bytes written. The buffer buf needs
+ * to be large enough to contain the value;
+ */
+ virtual size_t write(uint8_t *buf) = 0;
+};
+
+struct OutputMetadataUTCO : public OutputMetadata {
+ explicit OutputMetadataUTCO(int16_t utco) : utco(utco) {}
+ output_metadata_id_e getId(void) const { return output_metadata_id_e::utc_offset; }
+ virtual size_t getLength(void) const { return 5; }
+ virtual size_t write(uint8_t *buf);
+
+ int16_t utco;
+};
+
+struct OutputMetadataEDITime : public OutputMetadata {
+ explicit OutputMetadataEDITime(uint32_t seconds) : seconds(seconds) {}
+ output_metadata_id_e getId(void) const { return output_metadata_id_e::edi_time; }
+ virtual size_t getLength(void) const { return 7; }
+ virtual size_t write(uint8_t *buf);
+
+ uint32_t seconds;
+
+};
+
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