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Digital Speech Decoder - Florida Man Edition

This version of DSD is a flavor blend of szechyjs RTL branch and some of my own additions, along with a few tweaks from the LouisErigHerve branch as well. NXDN voice decoding is currently working a lot better, thanks to the latter, although I have yet to explore the expanded NXDN or DMR decoding he has laid out. That is a goal. I have also implemented a few more RTL options, including rtl device gain, PPM error, device index selection, squelch, VFO bandwidth, and a UDP remote that works like the old rtl_udp fork, although its currently limited to changing frequency and squelch. The goal is to integrate this project into EDACS-FM but I also want it to be its own standalone project.

alt text

Example Usage

padsp -m dsdfme -- ./dsd -fi -i rtl -o /dev/dsp -c 154.9875M -P -2 -D 1 -G 36 -L 25 -V 2 -U 6020 -Y 8

-i rtl to use rtl_fm 

-c Set frequency

-P set PPM error

-D set device index number

-G set device gain (0-49) (default = 0 Auto Gain)

-L set rtl squelch to 25

-V set RTL sample 'volume' multiplier

-U set UDP port for rtl_fm remote control

-Y 8 set rtl VFO bandwidth in kHz, (default = 48)(6, 8, 12, 16, 24, 48)

-W Monitor Source Audio (WIP!) (may or may not decode audio if this is on, depending on selected decode type and luck)
(Also, should be noted that depending on modulation, may sound extremely terrible)
(Currently causing Pulse Audio server to restart on Mint, but works in Arch)

Roadmap

The Current list of objectives include:

  1. Random Tinkering

  2. Implement Pulse Audio and Remove PortAudio and~ Remove OSS, Retain PortAudio as Optional

  3. Improve NXDN support

  4. More Concise Printouts - Ncurses

  5. Improve Monitor Source Audio (if #2 on list is up and working) Not currently playing well with Pulse Audio, need to re-evaluate

License

Copyright (C) 2010 DSD Author GPG Key ID: 0x3F1D7FD0 (74EF 430D F7F2 0A48 FCE6 F630 FAA2 635D 3F1D 7FD0)

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.