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redsea changelog

1.0 (2024-06-27)

  • New features:
    • Add support for Enhanced RadioText (eRT)
    • Add support for Long PS in Group 15A (#104)
    • Add runtime option --no-fec for disabling error correction
  • UX changes:
    • Breaking: Print a warning to stderr if the raw MPX input sample rate is not specified (breaks the previous silent assumption of 171 kHz)
    • Improve error reporting in general
    • Add --output hex (same as --output-hex) to mirror --input hex
  • Fixes:
    • Fix detection of invalid date/time (timestamps >2000 years ago)
    • Noise resistance improvements (#106):
      • Require three (instead of two) repeats of a new PI before accepting it
      • Require three (instead of two) synchronization pulses before locking
  • Maintainability:
    • Migrate build system from autotools to meson (#90)
    • Switch from patched, packaged-in JsonCPP to external nlohmann-json (#109)
      • Breaking: The order of some JSON elements has changed (insertion order instead of alphabetical)
    • Add automated CI builds for macOS, Windows (MSYS2/MinGW + Cygwin), Ubuntu-latest, Debian Buster
    • Add Debian packaging (#101)
    • Add basic Catch2 unit tests (#84)
    • Add .clang-format (not automated)
    • Remove unmaintained build options for non-liquid, non-TMC builds
    • Fix compiler warnings, issues identified via static analysis, and other code cleanup

0.21 (2024-01-26)

  • Add support for decoding LTCC and LTECC in TMC (#80)
  • Add support for decoding RDS output from the TEF6686 tuner (#89)
  • Add support for Alternative Frequencies Method B (#88)
  • Breaking: Change the name of the field alt_kilohertz to either alt_frequencies_a or alt_frequencies_b. The type of data sent by these methods differs. When --show-partial is set, the AF list will be in partial_alt_frequencies regardless of method.
  • Add option --input / -i to specify the stdin input format (bits, hex, mpx, tef). The old options will still work.
  • Fix automake script on Windows (#81)
  • Fix compatibility with current liquid-dsp (#78)
  • Fix output for UTF-8 encoded TMC location tables (#82)
  • Fix clock_time displaying wrong date around midnight (#83)
  • Fix misinterpretation of the Decoder Identification bits (#87)
  • Fix decoding of RadioText for stations that don't use string terminators (#77)
  • Fix an off-by-one bug in the RadioText decoder that sometimes caused missing characters at the end of messages
  • Fix runaway PLL after digital silence by clamping the phase error (#94)

0.20 (2021-03-08)

  • Recognize more ODAs and features - thanks Andreas Mikula
  • Add support for PTY names (group 10A)
  • Add partial support for DAB cross-referencing (ODA 0x0093)
  • Add support for raw broadcaster data in EON (variant 15)
  • Add support for transparent data channels (groups 5A, 5B)
  • Add support for fractional seconds in the rx timestamp format (%f).
  • Add support for TMC tuning info variant 8
  • Add buffer delay compensation to rx timestamps. Timestamps aim to represent the time the PCM samples were read in.
  • Place some JSON fields in the beginning of the line for easier visual inspection (pi, group, ps...)
  • Print raw ODA data if the application is not supported

0.19 (2020-04-06)

  • Add option --show-raw (-R) for including the raw group data as a hex string in the JSON output
  • Print usage help if there are non-option arguments on the command line
  • Fix uninitialized block error rate values on some systems
  • Update jsoncpp from 1.8.1 to 1.8.4 to fix some warnings

0.18 (2019-05-19)

  • Add support for loading multiple TMC location databases by specifying --loctable more than once.
  • Sample rate can also be specified as -r 171k instead of -r 171000.
  • Fix a crash if the input audio file couldn't be loaded.
  • Print usage help instead of error message when stdin is empty.
  • Speed up loading of TMC location database.
  • Improve block sync detection by ignoring spurious sync pulses.
  • Fine-tune filter bandwidths for better sensitivity, based on test runs.
  • At EOF, process the last partially received group.
  • Remove character codetables G1 and G2 since they don't appear in the latest RDS standard any more.
  • Clean up code to ensure maintainability. Redsea now requires a compiler that supports C++14.

0.17.1 (2018-06-08)

  • Fix: Return exit value 0 if --version or --help was requested
  • Don't open stdout for libsndfile unless --feed-through was specified, otherwise json can't be written (this may break the feed-through on Linux temporarily)

0.17.0 (2018-06-05)

  • Change the type of the JSON field for TMC message urgency, from integer (0, 1, 2) to string ("none", "U", "X")
  • Speed improvements by avoiding a few extraneous buffer copies internally

0.16.0 (2018-03-27)

  • Add support for multi-channel signals (--channels) - libsndfile is now a required dependency
  • Speed improvements:
    • By using a lookup table instead of sinf/cosf to generate the mix-down sinusoid
    • By only using one mix-down operation instead of two

0.15.0 (2018-01-31)

  • Add prog_item_number field containing the raw Program Item Number
  • Add partial_alt_kilohertz field containing an incomplete list of alternative frequencies when the --show-partial option is used
  • Add configure option --without-macports to disable directory checks when cross-compiling
  • Reduce write calls to output JSON stream using a stringstream (#56)
  • Remove an old shell script that launches rtl_fm - instead, there is a mention of rtl_fm usage in the readme and wiki

0.14.1 (2017-12-08)

  • Change the callsign object name to callsign_uncertain when a station's PI code begins with a 1
  • Fix UTC+14 getting marked as invalid (it's the time zone in Kiribati)
  • Fix syntax errors in schema

0.14.0 (2017-11-14)

  • Add support for decoding call sign letters from North American (RBDS) stations - activated by the -u switch

0.13.0 (2017-09-19)

  • Change the JSON structure in radiotext_plus: RT+ tags are now displayed as an array of objects with content-type and data:
"radiotext_plus":{
  "tags":[
    {"content-type":"item.artist",
     "data":"SeeB feat. Neev"},
    {"content-type":"item.title",
     "data":"Breathe"}
  ]
}
  • Change the way frequencies are displayed for better machine readability, from "frequency":"87.9 MHz" to "kilohertz":87900
  • Update jsoncpp from version 1.7.7 to 1.8.1

0.12.0 (2017-07-22)

  • Add support for time-of-demodulation timestamps (-t, --timestamp)
  • Add support for average block error rate (BLER) estimation (-E, --bler)
  • Change the long option for -b to --input-bits and fix the incorrect option in the usage help

0.11.0 (2017-04-17)

  • Add support for TMC alternative frequencies (tuning info variant 6)
  • Add support for TMC gap parameter and enhanced mode (3A group variant 1)
  • Change JSON schema for TMC: encryption_id is now under system_info
  • Change PLL bandwidth and lowpass cutoff frequency to improve noise performance
  • Change resampler anti-alias cutoff frequency to allow for lower sample rates
  • Fix missing zero-padding in PIN time string
  • Fix uninitialized PI field occasionally getting printed when the actual PI is missed
  • Fix some names not getting read properly from the location database
  • Fix grammar in some TMC event descriptions
  • Fix potentially uninitialized data printout when a type 6B group was not fully received
  • Fix potentially uninitialized RadioText+ tags when the group was not fully received
  • Fix spurious printouts of "version B" groups when the C' offset was not seen

0.10.0 (2017-04-03)

  • Add support for non-default sample rates (-r option) using an internal resampler
  • Add support for reading audio files (libsndfile dependency, can be disabled)

0.9.2 (2017-03-30)

  • Fix location table info being sometimes printed into the wrong stream
  • Fix conflicting compiler optimization flags

0.9.1 (2017-02-11)

  • Add support for type 14B EON groups
  • Change rtl-rx.sh to run redsea installed in $PATH

0.9.0 (2016-12-15)

  • Add support for Decoder Identification (DI)
  • Add support for auxiliary character code tables (G1 and G2)
  • Add support for TMC location tables (--loctable DIR), adds iconv dependency
  • Add schema to specify JSON output format
  • Fix UTC time zone being displayed as "-00:00"
  • Fix PS strings getting trimmed

0.8.1 (2016-12-02)

  • Add option -p or --show-partial to display PS and RadioText before completely received (disabled by default)
  • Add support for EON variant 4 (alternative frequencies for other networks)
  • Add support for LF/MF alternative frequencies
  • Add support for frequency quantifiers in TMC
  • Change the way alternative frequencies are printed (87.9 becomes "87.9 MHz") to allow for LF/MF frequencies
  • Fix radiotext decoding for group 2B, thanks Anonymous
  • Fix empty hex group printout at EOF

0.8.0 (2016-11-23)

  • Add option -e to echo stdin to stdout and print the decoded output to stderr
  • Use jsoncpp for JSON serialization
  • Change the order of JSON keys (alphabetical instead of PI first) because of jsoncpp

0.7.6 (2016-10-02)

  • Add partial_radiotext and partial_ps fields that show RadioText and PS before they're fully received
  • Add support for partially received 15B groups
  • Better algorithm for biphase symbol decoding, improves performance with noisy signals
  • Fix unnecessary sync drops
  • Print all received hex blocks even if the beginning of the group was missed
  • Try to decode the group even if PI was missed once

0.7.5 (2016-09-30)

  • Adjust filter parameters to get a slightly better signal in noisy conditions
  • Don't correct bit errors longer than 2 bits
  • Fix incorrect formatting of negative local time offset with half-hours
  • Fix incorrect JSON formatting in TMC Other Network output
  • Fix potential JSON error by escaping the backslash character in PS, RT
  • Don't print PIN with invalid clock time

0.7.4 (2016-09-25)

  • Add partial support for 15B groups (Fast basic tuning and switching information)
  • Add support for "speech/music" flag
  • Add support for TMC Other Network info
  • Add ./configure option --without-liquid to compile without liquid-dsp and demodulation support
  • Add ./autogen.sh to generate ./configure
  • Change TMC disable flag to a ./configure option as well, --disable-tmc
  • Change JSON booleans from strings ("true") to plain booleans (true)
  • Change JSON format of all TMC location table and service ID numbers from hex strings ("0x1F") to plain numbers (31)
  • Fix PLL implementation, now actually locks onto a frequency

0.7.3 (2016-09-20)

  • Compile all TMC text data in to the executable - no external files (#26)
  • Add compile-time flag to disable TMC support, as the above can take some time
  • Add option -u to use North American (RBDS) program type names
  • Fix TMC message not showing until the next one is received (#21)
  • Fix spelling of program type names (no title case or 16-character limit)
  • Fix high error rate in the beginning of reception by increasing AGC bandwidth
  • Change format of alternate frequencies from string to numbers
  • Change format of TMC location table number from hex string to number

0.7.2 (2016-09-18)

  • Apply burst error correction to check bits as well
  • Fix off-by-one errors in RadioText+ caused by RT characters being converted to UTF-8, thanks flux242
  • Fix most cases of RadioText+ fields containing segments from a previous RT message
  • Fix bogus {"pi":"0x0000"} printout at EOF
  • Don't print empty or incomplete TMC messages
  • Use "debug" JSON object instead of C-style comments for debug information
  • Warn if TMC data files couldn't be opened

0.7.1 (2016-09-17)

  • Fixed broken JSON output in 3A groups, thanks flux242

0.7.0 (2016-09-16)

  • First numbered release!