Merge pull request #108570 from ymarkus/soundmodem

soundmodem: init at 0.20

pkgs/applications/radio/soundmodem/default.nix

···
+{ stdenv, fetchurl, pkg-config, alsaLib, audiofile, gtk2, libxml2 }:
+
+stdenv.mkDerivation rec {
+  name = "soundmodem";
+  version = "0.20";
+
+  src = fetchurl {
+    url = "https://archive.org/download/${name}-${version}/${name}-${version}.tar.gz";
+    sha256 = "156l3wjnh5rcisxb42kcmlf74swf679v4xnj09zy5j74rd4h721z";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ alsaLib audiofile gtk2 libxml2 ];
+
+  patches = [ ./matFix.patch ];
+
+  doCheck = true;
+
+  meta = with stdenv.lib; {
+    description = "Audio based modem for ham radio supporting ax.25";
+    longDescription = ''
+      This software allows a standard PC soundcard to be used as a packet radio "modem". The whole processing is done on the main processor CPU.
+      Unlike previous packet radio modem software, this new release offers several new benefits:
+        - Now uses standard operating system sound drivers (OSS/Free under Linux, /dev/audio under Solaris and DirectSound under Windows), thus runs on all soundcards for which drivers for the desired operating system are available.
+        - No fixed relationship between bitrate, sampling rate, and modem parameters. Modems may be parametrized, and multiple modems may even run on the same audio channel!
+        - Usermode solution allows the use of MMX, VIS, Floating point and other media instruction sets to speed up computation.
+        - Cross platform builds from a single source code provides ubiquitous availability.
+    '';
+    #homepage = "http://gna.org/projects/soundmodem"; # official, but "Connection refused"
+    homepage = "http://soundmodem.vk4msl.id.au/";
+    downloadPage = "https://archive.org/download/${name}-${version}/${name}-${version}.tar.gz";
+    license = licenses.gpl2Only;
+    maintainers = with maintainers; [ ymarkus ];
+    platforms = platforms.all;
+  };
+}

pkgs/applications/radio/soundmodem/matFix.patch

···
+--- a/matlib/mat.hh	2003-01-06 23:47:26.000000000 +0100
++++ b/matlib/mat.copy.hh	2021-01-06 10:05:34.332415179 +0100
+@@ -91,7 +91,7 @@
+                 memcpy(c, r, d1 * d3 * sizeof(c[0]));
+ }
+
+-template<typename T> void mdet(const T *c, unsigned int d)
++template<typename T> int mdet(const T *c, unsigned int d)
+ {
+         T *c2;
+         unsigned int i, j, k, l;

pkgs/top-level/all-packages.nix

···
 
   snscrape = with python3Packages; toPythonApplication snscrape;
 
+  soundmodem = callPackage ../applications/radio/soundmodem {};
+
   soundOfSorting = callPackage ../misc/sound-of-sorting { };
 
   sourceAndTags = callPackage ../misc/source-and-tags {