alsaequal: init at 0.6

Co-Authored-By: Doron Behar <doron.behar@gmail.com>

pkgs/tools/audio/alsaequal/caps_9.x.patch

@@ -0,0 +1,21 @@
+--- ./ctl_equal.c
++++ ./ctl_equal.c
+@@ -167,7 +167,7 @@
+ 	snd_ctl_equal_t *equal;
+ 	const char *controls = ".alsaequal.bin";
+ 	const char *library = "/usr/lib/ladspa/caps.so";
+-	const char *module = "Eq";
++	const char *module = "Eq10";
+ 	long channels = 2;
+ 	const char *sufix = " Playback Volume";
+ 	int err, i, index;
+--- ./pcm_equal.c
++++ ./pcm_equal.c
+@@ -151,7 +151,7 @@
+ 	snd_config_t *sconf = NULL;
+ 	const char *controls = ".alsaequal.bin";
+ 	const char *library = "/usr/lib/ladspa/caps.so";
+-	const char *module = "Eq";
++	const char *module = "Eq10";
+ 	long channels = 2;
+ 	int err;

pkgs/tools/audio/alsaequal/default.nix

@@ -0,0 +1,42 @@
+{ stdenv, fetchurl
+, alsaLib, caps
+}:
+
+stdenv.mkDerivation rec {
+  name = "alsaequal";
+  version = "0.6";
+
+  src = fetchurl {
+    url = "https://thedigitalmachine.net/tools/alsaequal-${version}.tar.bz2";
+    sha256 = "1w3g9q5z3nrn3mwdhaq6zsg0jila8d102dgwgrhj9vfx58apsvli";
+  };
+
+  buildInputs = [ alsaLib ];
+
+  makeFlags = [ "DESTDIR=$(out)" ];
+
+  # Borrowed from Arch Linux's AUR
+  patches = [
+    # Adds executable permissions to resulting libraries
+    # and changes their destination directory from "usr/lib/alsa-lib" to "lib/alsa-lib" to better align with nixpkgs filesystem hierarchy.
+    ./makefile.patch
+    # Fixes control port check, which resulted in false error.
+    ./false_error.patch
+    # Fixes name change of an "Eq" to "Eq10" method in version 9 of caps library.
+    ./caps_9.x.patch
+  ];
+
+  postPatch = ''
+    sed -i 's#/usr/lib/ladspa/caps\.so#${caps}/lib/ladspa/caps\.so#g' ctl_equal.c pcm_equal.c
+  '';
+
+  preInstall = ''
+    mkdir -p "$out/lib/alsa-lib"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Real-time adjustable equalizer plugin for ALSA";
+    homepage = "https://thedigitalmachine.net/alsaequal.html";
+    license = licenses.gpl2;
+  };
+}

pkgs/tools/audio/alsaequal/false_error.patch

@@ -0,0 +1,13 @@
+--- ./ctl_equal.c
++++ ./ctl_equal.c
+@@ -263,8 +263,8 @@
+ 	for(i = 0; i < equal->num_input_controls; i++) {
+ 		if(equal->control_data->control[i].type == LADSPA_CNTRL_INPUT) {
+ 			index = equal->control_data->control[i].index;
+-			if(equal->klass->PortDescriptors[index] !=
+-					(LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL)) {
++			if(equal->klass->PortDescriptors[index] &
++					(LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL) == 0) {
+ 				SNDERR("Problem with control file %s, %d.", controls, index);
+ 				return -1;
+ 			}

pkgs/tools/audio/alsaequal/makefile.patch

@@ -0,0 +1,13 @@
+--- ./Makefile
++++ ./Makefile
+@@ -45,8 +45,8 @@
+
+ install: all
+ 	@echo Installing...
+-	$(Q)install -m 644 $(SND_PCM_BIN) ${DESTDIR}/usr/lib/alsa-lib/
+-	$(Q)install -m 644 $(SND_CTL_BIN) ${DESTDIR}/usr/lib/alsa-lib/
++	$(Q)install -m 755 $(SND_PCM_BIN) ${DESTDIR}/lib/alsa-lib/
++	$(Q)install -m 755 $(SND_CTL_BIN) ${DESTDIR}/lib/alsa-lib/
+
+ uninstall:
+ 	@echo Un-installing...

pkgs/top-level/all-packages.nix

@@ -521,6 +521,8 @@ in
   acoustidFingerprinter = callPackage ../tools/audio/acoustid-fingerprinter {
     ffmpeg = ffmpeg_2;
   };
+  
+  alsaequal = callPackage ../tools/audio/alsaequal { };
 
   acpica-tools = callPackage ../tools/system/acpica-tools { };