Add test tool to validate API

Makefile.am

@@ -1,5 +1,5 @@
 AUTOMAKE_OPTIONS = foreign
-SUBDIRS = src
+SUBDIRS = src tools
 EXTRA_DIST = doxygen/libklbars.doxyconf doxygen/include
 
 docs:

configure.ac

@@ -39,7 +39,7 @@ AC_TYPE_UINT8_T
 # Checks for library functions.
 AC_CHECK_FUNCS([memset strrchr])
 
-AC_CONFIG_FILES([Makefile src/Makefile])
+AC_CONFIG_FILES([Makefile src/Makefile tools/Makefile])
 AC_OUTPUT
 
 # Add debug support

tools/Makefile.am

@@ -0,0 +1,20 @@
+
+AUTOMAKE_OPTIONS = foreign
+
+CFLAGS += -Wall -DVERSION=\"$(VERSION)\" -DPROG="\"$(PACKAGE)\"" -D_FILE_OFFSET_BITS=64 -O3 \
+	-I$(top_srcdir)/src \
+	-L$(top_builddir)/src/.libs -lpthread -lklbars
+
+if DEBUG
+	CFLAGS += -g
+endif
+
+CXXFLAGS = $(CFLAGS)
+
+SRC  = klbars-test.c
+
+bin_PROGRAMS  = klbars_test
+
+klbars_test_SOURCES = $(SRC)
+
+libklbars_noinst_includedir = $(includedir)

tools/klbars-test.c

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <libklbars/klbars.h>
+
+int main()
+{
+  struct kl_colorbar_context osd_ctx;
+  int width=640, height=480;
+  unsigned char *buf;
+
+  /* Use the custom V210 stride required by the Decklink stack */
+  int rowWidth = ((width + 47) / 48) * 128;
+  fprintf(stderr, "row stride is %d\n", rowWidth);
+
+  buf = malloc(rowWidth * height);
+  memset(buf, 0, rowWidth * height);
+  kl_colorbar_init(&osd_ctx, width, height, KL_COLORBAR_10BIT);
+  kl_colorbar_fill_colorbars(&osd_ctx);
+  kl_colorbar_finalize(&osd_ctx, buf, rowWidth);
+
+  for (int i = 0; i < 32; i++) {
+    printf("%02x ", buf[i]);
+  }
+  printf("\n");
+
+  int fd = open("foo.yuv", O_WRONLY | O_TRUNC | O_CREAT, 0644);
+  write(fd, buf, rowWidth * height);
+  close(fd);
+
+  kl_colorbar_free(&osd_ctx);
+  return 0;
+}