lpcnet API function to return git hash

CMakeLists.txt

@@ -50,6 +50,29 @@ if(LPCNET_VERSION_PATCH)
 endif()
 message(STATUS "LPCNet version: ${LPCNET_VERSION}")
 
+#
+# Find the git hash if this is a working copy.
+#
+if(EXISTS ${CMAKE_SOURCE_DIR}/.git)
+    find_package(Git QUIET)
+    if(Git_FOUND)
+        execute_process(
+            COMMAND "${GIT_EXECUTABLE}" describe --always HEAD
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            RESULT_VARIABLE res
+            OUTPUT_VARIABLE FREEDV_HASH
+            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+        message(STATUS "freedv-gui current git hash: ${FREEDV_HASH}")
+        add_definitions(-DGIT_HASH="${FREEDV_HASH}")
+    else()
+        message(WARNING "Git not found. Can not determine current commit hash.")
+        add_definitions(-DGIT_HASH="Unknown")
+    endif()
+else()
+        add_definitions(-DGIT_HASH="None")
+endif()
+
 # Set default flags
 set(CMAKE_C_FLAGS "-Wall -W -Wextra -Wno-unused-function -O3 -g -I. -MD ${CMAKE_C_FLAGS} -DENABLE_ASSERTIONS")
 

src/lpcnet.c

@@ -274,3 +274,8 @@ void lpcnet_synthesize(LPCNetState *lpcnet, short *output, float *features, int
     start = 0;
 }
 
+static char git_hash[] = GIT_HASH;
+char *lpcnet_get_hash(void) {
+    return git_hash;
+}
+

src/lpcnet_freedv.h

@@ -16,5 +16,6 @@ void lpcnet_enc(LPCNetFreeDV *lf, short *pcm, char *frame);
 void lpcnet_dec(LPCNetFreeDV *lf, char *frame, short* pcm);
 int lpcnet_bits_per_frame(LPCNetFreeDV *lf);
 int lpcnet_samples_per_frame(LPCNetFreeDV *lf);
+char *lpcnet_get_hash(void);
 
 #endif