Add libavcore.

The new library is meant to contain the core multimedia utilities for
FFmpeg, to make them shareable between more libav* libraries.

See thread:
Subject: [FFmpeg-devel] [RFC] New library for shared non-generic libav* utils
Date: Fri, 9 Jul 2010 01:07:40 +0200

Originally committed as revision 24393 to svn://svn.ffmpeg.org/ffmpeg/trunk

4 files changed, 112 insertions, 0 deletions

diff --git a/libavcore/Makefile b/libavcore/Makefile
new file mode 100644
index 0000000000..c5140c4ecd
--- /dev/null
+++ b/libavcore/Makefile
@@ -0,0 +1,9 @@
+include $(SUBDIR)../config.mak
+
+NAME = avcore
+
+HEADERS = avcore.h                                                      \
+
+OBJS = utils.o                                                          \
+
+include $(SUBDIR)../subdir.mak
diff --git a/libavcore/avcore.h b/libavcore/avcore.h
new file mode 100644
index 0000000000..2c803b9bb5
--- /dev/null
+++ b/libavcore/avcore.h
@@ -0,0 +1,58 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCORE_AVCORE_H
+#define AVCORE_AVCORE_H
+
+/**
+ * @file
+ * shared media utilities for the libav* libraries
+ */
+
+#include <libavutil/avutil.h>
+
+#define LIBAVCORE_VERSION_MAJOR  0
+#define LIBAVCORE_VERSION_MINOR  0
+#define LIBAVCORE_VERSION_MICRO  0
+
+#define LIBAVCORE_VERSION_INT   AV_VERSION_INT(LIBAVCORE_VERSION_MAJOR, \
+                                               LIBAVCORE_VERSION_MINOR, \
+                                               LIBAVCORE_VERSION_MICRO)
+#define LIBAVCORE_VERSION       AV_VERSION(LIBAVCORE_VERSION_MAJOR,     \
+                                           LIBAVCORE_VERSION_MINOR,     \
+                                           LIBAVCORE_VERSION_MICRO)
+#define LIBAVCORE_BUILD         LIBAVCORE_VERSION_INT
+
+#define LIBAVCORE_IDENT         "Lavcore" AV_STRINGIFY(LIBAVCORE_VERSION)
+
+/**
+ * Return the LIBAVCORE_VERSION_INT constant.
+ */
+unsigned avcore_version(void);
+
+/**
+ * Return the libavcore build-time configuration.
+ */
+const char *avcore_configuration(void);
+
+/**
+ * Return the libavcore license.
+ */
+const char *avcore_license(void);
+
+#endif /* AVCORE_AVCORE_H */
diff --git a/libavcore/libavcore.v b/libavcore/libavcore.v
new file mode 100644
index 0000000000..dc84cc4965
--- /dev/null
+++ b/libavcore/libavcore.v
@@ -0,0 +1,4 @@
+LIBAVCORE_$MAJOR {
+        global: av_*; ff_*; avcore*;
+        local: *;
+};
diff --git a/libavcore/utils.c b/libavcore/utils.c
new file mode 100644
index 0000000000..8350a9bcad
--- /dev/null
+++ b/libavcore/utils.c
@@ -0,0 +1,41 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "config.h"
+#include "avcore.h"
+
+/**
+ * @file
+ * various utility functions
+ */
+
+unsigned avcore_version(void)
+{
+    return LIBAVCORE_VERSION_INT;
+}
+
+const char *avcore_configuration(void)
+{
+    return FFMPEG_CONFIGURATION;
+}
+
+const char *avcore_license(void)
+{
+#define LICENSE_PREFIX "libavcore license: "
+    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
+}