idct: Split off Xvid IDCT

The Xvid IDCT is only required to decode some Xvid-encoded MPEG-4 files,
so there is no point in having it as an unconditional part of idctdsp.

1 files changed, 29 insertions, 0 deletions

diff --git a/libavcodec/xvididct.h b/libavcodec/xvididct.h
new file mode 100644
index 0000000000..a688bc8c0e
--- /dev/null
+++ b/libavcodec/xvididct.h
@@ -0,0 +1,29 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_XVIDIDCT_H
+#define AVCODEC_XVIDIDCT_H
+
+#include "avcodec.h"
+#include "idctdsp.h"
+
+void ff_xvididct_init(IDCTDSPContext *c, AVCodecContext *avctx);
+
+void ff_xvididct_init_x86(IDCTDSPContext *c);
+
+#endif /* AVCODEC_XVIDIDCT_H */