summaryrefslogtreecommitdiffstats
path: root/src/dabOutput/metadata.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/dabOutput/metadata.h')
-rw-r--r--src/dabOutput/metadata.h79
1 files changed, 79 insertions, 0 deletions
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;
+
+};
+