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-rw-r--r--m4/as-ffmpeg.m499
1 files changed, 99 insertions, 0 deletions
diff --git a/m4/as-ffmpeg.m4 b/m4/as-ffmpeg.m4
new file mode 100644
index 00000000..612224c8
--- /dev/null
+++ b/m4/as-ffmpeg.m4
@@ -0,0 +1,99 @@
+# CFLAGS and library paths for FFMPEG
+# taken from Autostar Sandbox, http://autostars.sourceforge.net/
+
+dnl Usage:
+dnl AM_PATH_FFMPEG([MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+dnl FIXME: version checking does not work currently
+dnl
+dnl Example:
+dnl AM_PATH_FFMPEG(0.4.6, , AC_MSG_ERROR([*** FFMPEG >= 0.4.6 not installed))
+dnl
+dnl Defines FFMPEG_LIBS
+dnl FIXME: should define FFMPEG_VERSION
+dnl
+
+AC_DEFUN(AM_PATH_FFMPEG,
+[
+ dnl allow for specification of a source path (for uninstalled)
+ AC_ARG_WITH(ffmpeg-source,
+ AC_HELP_STRING([--with-ffmpeg-source=DIR],
+ [Directory where FFmpeg source is (optional)]),
+ ffmpeg_source="$withval", ffmpeg_source="")
+
+ dnl save CFLAGS and LIBS here
+ CFLAGS_save=$CFLAGS
+ LIBS_save=$LIBS
+ if test "x$ffmpeg_source" != "x"; then
+ dnl uninstalled FFmpeg copy
+ AC_MSG_NOTICE([Looking for FFmpeg source in $ffmpeg_source])
+ CFLAGS="-I$ffmpeg_source/libav -I$ffmpeg_source/libavcodec"
+ LIBS="-L$ffmpeg_source/libav -L$ffmpeg_source/libavcodec"
+ AC_DEFINE_UNQUOTED(HAVE_FFMPEG_UNINSTALLED, 1,
+ [defined if we compile against uninstalled FFmpeg])
+ FFMPEG_COMMON_INCLUDE="#include <common.h>"
+ else
+ FFMPEG_COMMON_INCLUDE="#include <ffmpeg/common.h>"
+ fi
+
+ dnl check for libavcodec
+ AC_CHECK_LIB(avcodec, avcodec_init, HAVE_FFMPEG=yes, HAVE_FFMPEG=no)
+
+ dnl check for avcodec.h and avformat.h
+ if test "x$ffmpeg_source" != "x"; then
+ dnl uninstalled
+ AC_CHECK_HEADER(avcodec.h, , HAVE_FFMPEG=no, [/* only compile */])
+ AC_CHECK_HEADER(avformat.h, , HAVE_FFMPEG=no, [/* only compile */])
+ else
+ AC_CHECK_HEADER(ffmpeg/avcodec.h, , HAVE_FFMPEG=no)
+ AC_CHECK_HEADER(ffmpeg/avformat.h, , HAVE_FFMPEG=no)
+ fi
+
+dnl now check if it's sufficiently new
+
+ AC_LANG_SAVE()
+ AC_LANG_C()
+
+ dnl FIXME: we use strcmp, which we know is going to break if ffmpeg ever uses
+ dnl two digits for any of their version numbers. It makes the test so much
+ dnl easier though so let's ignore that
+ AC_TRY_RUN([
+$FFMPEG_COMMON_INCLUDE
+#include <stdio.h>
+#include <string.h>
+
+int
+main ()
+{
+ if (strcmp (FFMPEG_VERSION, "$1") == -1)
+ {
+ fprintf (stderr,
+ "ERROR: your copy of ffmpeg is too old (%s)\n", FFMPEG_VERSION);
+ return 1;
+ }
+ else
+ return 0;
+}
+], , HAVE_FFMPEG=no)
+
+dnl now do the actual "do we have it ?" test
+ if test "x$HAVE_FFMPEG" = "xyes"; then
+ FFMPEG_LIBS="$LIBS -lavcodec -lavformat"
+ FFMPEG_CFLAGS="$CFLAGS"
+ AC_MSG_NOTICE(we have ffmpeg)
+ dnl execute what we have to because it's found
+ ifelse([$2], , :, [$2])
+ else
+ FFMPEG_LIBS=""
+ FFMPEG_CFLAGS=""
+ dnl execute what we have to because it's not found
+ ifelse([$3], , :, [$3])
+ fi
+
+dnl make variables available
+ AC_SUBST(FFMPEG_LIBS)
+ AC_SUBST(FFMPEG_CFLAGS)
+ AC_SUBST(HAVE_FFMPEG)
+ AC_LANG_RESTORE()
+ CFLAGS=$CFLAGS_save
+ LIBS=$LIBS_save
+])