Add DSD (Digital Speech Decoder) support with mbelib WASM

.gitignore

@@ -37,4 +37,5 @@ Thumbs.db
 .cache
 *.tsbuildinfo
 *.tgz
-.claude
+.claude
+.emsdk

mbelib-wasm/build.sh

@@ -0,0 +1,51 @@
+#!/bin/bash
+# Build mbelib as WASM module for BrowSDR DSD decoder.
+#
+# Prerequisites: Emscripten SDK (emcc) must be in PATH.
+#   Install: https://emscripten.org/docs/getting_started/downloads.html
+#
+# Usage: cd mbelib-wasm && bash build.sh
+#
+# Output: ../public/lib/mbelib/mbelib.js + mbelib.wasm
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+OUT_DIR="$SCRIPT_DIR/../public/lib/mbelib"
+MBELIB_DIR="$SCRIPT_DIR/mbelib"
+
+# Clone mbelib if not present
+if [ ! -d "$MBELIB_DIR" ]; then
+    echo "Downloading mbelib source..."
+    curl -sL "https://github.com/szechyjs/mbelib/archive/9a04ed5c78176a9965f3d43f7aa1b1f5330e771f.tar.gz" | tar xz -C "$SCRIPT_DIR"
+    mv "$SCRIPT_DIR/mbelib-9a04ed5c78176a9965f3d43f7aa1b1f5330e771f" "$MBELIB_DIR"
+    echo "mbelib source downloaded."
+fi
+
+mkdir -p "$OUT_DIR"
+
+echo "Building mbelib WASM..."
+emcc -O3 \
+    -s WASM=1 \
+    -s MODULARIZE=1 \
+    -s EXPORT_NAME='MbelibModule' \
+    -s EXPORTED_FUNCTIONS='["_mbelib_init","_mbelib_reset","_mbelib_decode_ambe","_mbelib_decode_imbe","_mbelib_get_err_str","_mbelib_get_errs","_mbelib_get_errs2","_malloc","_free"]' \
+    -s EXPORTED_RUNTIME_METHODS='["ccall","cwrap","getValue","setValue","UTF8ToString","HEAPF32","HEAP8"]' \
+    -s ALLOW_MEMORY_GROWTH=1 \
+    -s INITIAL_MEMORY=1048576 \
+    -s ENVIRONMENT='web,worker' \
+    -s FILESYSTEM=0 \
+    -s ASSERTIONS=0 \
+    -I"$MBELIB_DIR" \
+    -o "$OUT_DIR/mbelib.js" \
+    "$SCRIPT_DIR/wrapper.c" \
+    "$MBELIB_DIR/ambe3600x2400.c" \
+    "$MBELIB_DIR/ambe3600x2450.c" \
+    "$MBELIB_DIR/ecc.c" \
+    "$MBELIB_DIR/imbe7100x4400.c" \
+    "$MBELIB_DIR/imbe7200x4400.c" \
+    "$MBELIB_DIR/mbelib.c"
+
+echo "Build complete: $OUT_DIR/mbelib.js + mbelib.wasm"
+echo "File sizes:"
+ls -lh "$OUT_DIR"/mbelib.*

mbelib-wasm/mbelib/.gitignore

@@ -0,0 +1,4 @@
+*.[ao]
+*.so*
+*.dylib
+build

mbelib-wasm/mbelib/.travis.yml

@@ -0,0 +1,13 @@
+language: c
+
+compiler:
+  - gcc
+
+before_script:
+  - mkdir build
+  - cd build
+  - cmake ..
+
+script:
+  - make
+  - make test

mbelib-wasm/mbelib/CHANGELOG

@@ -0,0 +1,52 @@
+1.3.0:
+	Initial DSTAR AMBE support
+	Fixed random number generator
+	Several bug fixes and optimizations
+
+1.2.5	Use CMake:
+	The cross platform building was getting hard to maintain,
+	removed Makefile in favor of CMake.
+
+1.2.4	Fixed bugs:
+	Makefile cleanup
+	Readme file improvements
+	fix golayMatrix
+	bug in imbe7100x4400
+
+1.2.3	Fixed bugs:
+	Cik array in mbe_decodeAmbe2250Parms was too small
+
+1.2.2	Fixed bugs:
+	uninitialized variable in SpectralAmpEnhance()
+
+1.2.1	New Features:
+
+	Improved unvoiced speech synthesis
+
+	Fixed bugs:
+	bug in spectralAmpEnhance()
+
+1.2	New features:
+	Support for imbe7100x4400 vocoder
+	Improved audio quality
+
+	Fixed bugs:
+	error in hamming ecc
+
+1.1	New features:
+	new synthesizer functions with floating point output buffer.
+	original short output buffer function stubs for compatibility.
+	audio gain and clipping is no longer done during synthesis
+	except within the compatibility functions.
+
+1.0.2	Fixed bugs:
+        fixed several problems in synthesizer causing clicks
+	reduced error -> repeat thresholds for reduced noise bursts
+	ambe3600x2250 now correctly handles "Silence" frames
+	ambe Tone and Erasure frames are now indicated with T and E in errorbars
+
+1.0.1	Fixed bugs: 
+	cur_mp->repeat was not being copied to prev_mp 
+	logic to check for bad mbe frames was incorrect
+
+1.0	First release

mbelib-wasm/mbelib/CMakeLists.txt

@@ -0,0 +1,56 @@
+project(mbe)
+cmake_minimum_required(VERSION 2.6)
+
+if(MSVC)
+    # needed for M_PI macro
+    add_definitions(-D_USE_MATH_DEFINES)
+endif()
+
+FILE(GLOB SRCS *.c)
+
+include_directories("${PROJECT_SOURCE_DIR}")
+
+ADD_LIBRARY(mbe-static STATIC ${SRCS})
+ADD_LIBRARY(mbe-shared SHARED ${SRCS})
+if(NOT WIN32)
+    TARGET_LINK_LIBRARIES(mbe-static m)
+    TARGET_LINK_LIBRARIES(mbe-shared m)
+endif()
+
+include(GNUInstallDirs)
+
+set_target_properties(mbe-static mbe-shared
+                      PROPERTIES
+                      OUTPUT_NAME mbe
+                      VERSION 1.3
+                      SOVERSION 1
+                      INSTALL_NAME_DIR ${CMAKE_INSTALL_FULL_LIBDIR}
+                      PUBLIC_HEADER "mbelib.h")
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/libmbe.pc.in"
+               "${CMAKE_CURRENT_BINARY_DIR}/libmbe.pc"
+               @ONLY)
+
+install(FILES "${CMAKE_CURRENT_BINARY_DIR}/libmbe.pc"
+        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+install(TARGETS mbe-static mbe-shared
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+
+# uninstall target
+configure_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+    IMMEDIATE @ONLY)
+
+add_custom_target(uninstall
+    COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
+
+option(DISABLE_TEST "Disable building of test framework." OFF)
+
+if (NOT DISABLE_TEST)
+    enable_testing()
+    add_subdirectory(test)
+endif()

mbelib-wasm/mbelib/COPYRIGHT

@@ -0,0 +1,14 @@
+Copyright (C) 2010 mbelib Author
+GPG Key ID: 0xEA5EFE2C (9E7A 5527 9CDC EBF7 BF1B  D772 4F98 E863 EA5E FE2C)
+
+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.

mbelib-wasm/mbelib/README.md

@@ -0,0 +1,28 @@
+[![Build Status](https://travis-ci.org/szechyjs/mbelib.png?branch=master)](https://travis-ci.org/szechyjs/mbelib)
+
+PATENT NOTICE
+
+    This source code is provided for educational purposes only.  It is
+    a written description of how certain voice encoding/decoding
+    algorythims could be implemented.  Executable objects compiled or 
+    derived from this package may be covered by one or more patents.
+    Readers are strongly advised to check for any patent restrictions or 
+    licencing requirements before compiling or using this source code.
+
+mbelib 1.3.0
+
+        mbelib supports the 7200x4400 bit/s codec used in P25 Phase 1,
+        the 7100x4400 bit/s codec used in ProVoice and the "Half Rate"
+        3600x2250 bit/s vocoder used in various radio systems.
+
+Example building instructions on Ubuntu:
+
+    sudo apt-get update
+    sudo apt-get install git make cmake # Update packages
+    git clone <URL of git repository>   # Something like: git@github.com:USERNAME/mbelib.git
+    cd mbelib                           # Move into source folder
+    mkdir build                         # Create build directory
+    cd build                            # Move to build directory
+    cmake ..                            # Create Makefile for current system
+    make                                # Compiles the library
+    sudo make install                   # Library is installed into computer