[1/4] HR support: Add autotools skeleton for libgsmhr

Not functional yet, just the autotools magic to make a library

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

Makefile.am

@@ -3,4 +3,10 @@ ACLOCAL_AMFLAGS = -I m4
 
 INCLUDES = $(all_includes) -I$(top_srcdir)/include
 
-SUBDIRS = src include
+SUBDIRS = include
+
+if ENABLE_GSMHR
+SUBDIRS += libgsmhr
+endif
+
+SUBDIRS += src

configure.ac

@@ -12,12 +12,39 @@ AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_FILES([
 	Makefile
 	src/Makefile
+	libgsmhr/Makefile
 	include/Makefile
 	include/gapk/Makefile
+	include/gsmhr/Makefile
 ])
 
+# Options
+AC_ARG_ENABLE(gsmhr,
+	[AS_HELP_STRING(
+		[--disable-gsmhr],
+		[Disable support for GSM HR codec using reference code]
+	)],
+	[enable_gsmhr=0], [enable_gsmhr=1])
+AM_CONDITIONAL(ENABLE_GSMHR, test "x$enable_gsmhr" = "x1")
+if test "x$enable_gsmhr" = "x1"; then
+	AC_DEFINE(HAVE_LIBGSMHR, 1, [Define to 1 if libgsmhr is available])
+fi
+
+# Check for -fvisibility support
+#  (The following test is taken from WebKit's webkit.m4)
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fvisibility=hidden "
+AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
+AC_COMPILE_IFELSE([char foo;],
+	[ AC_MSG_RESULT([yes])
+	  SYMBOL_VISIBILITY="-fvisibility=hidden"],
+	AC_MSG_RESULT([no]))
+CFLAGS="$saved_CFLAGS"
+AC_SUBST(SYMBOL_VISIBILITY)
+
 # Checks for programs.
 AC_PROG_CC
+AC_PROG_LIBTOOL
 
 # Checks for libraries.
  # libosmocore (codec module)

include/Makefile.am

@@ -1 +1,5 @@
 SUBDIRS = gapk
+
+if ENABLE_GSMHR
+SUBDIRS += gsmhr
+endif

include/gsmhr/Makefile.am

@@ -0,0 +1 @@
+noinst_HEADERS =	gsmhr.h

include/gsmhr/gsmhr.h

@@ -0,0 +1,40 @@
+/* HR (GSM 06.20) codec */
+
+/*
+ * This file is part of gapk (GSM Audio Pocket Knife).
+ *
+ * gapk is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * gapk is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gapk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GSM_HR_H__
+#define __GSM_HR_H__
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct gsmhr;
+
+struct gsmhr *gsmhr_init(void);
+void          gsmhr_exit(struct gsmhr *state);
+int           gsmhr_encode(struct gsmhr *state, int16_t *hr_params, const int16_t *pcm);
+int           gsmhr_decode(struct gsmhr *state, int16_t *pcm, const int16_t *hr_params);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __GSM_HR_H__ */

libgsmhr/Makefile.am

@@ -0,0 +1,7 @@
+INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)
+AM_CFLAGS = -fPIC -Wall ${SYMBOL_VISIBILITY}
+
+LIBVERSION=0:0:0
+
+lib_LTLIBRARIES = libgsmhr.la
+libgsmhr_la_SOURCES = libgsmhr.c

libgsmhr/libgsmhr.c

@@ -0,0 +1,55 @@
+/* HR (GSM 06.20) codec wrapper */
+
+/*
+ * This file is part of gapk (GSM Audio Pocket Knife).
+ *
+ * gapk is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * gapk is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with gapk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+
+#include <gsmhr/gsmhr.h>
+
+
+#define EXPORT __attribute__((visibility("default")))
+
+
+struct gsmhr {
+	int stub;
+};
+
+EXPORT struct gsmhr *
+gsmhr_init(void)
+{
+	return NULL;
+}
+
+EXPORT void
+gsmhr_exit(struct gsmhr *state)
+{
+	return;
+}
+
+EXPORT int
+gsmhr_encode(struct gsmhr *state, int16_t *hr_params, const int16_t *pcm)
+{
+	return 0;
+}
+
+EXPORT int
+gsmhr_decode(struct gsmhr *state, int16_t *pcm, const int16_t *hr_params)
+{
+	return 0;
+}