lavfi: port libmpcodecs remove-logo filter

The code is based on the remove-logo filter in MPlayer/libmpcodecs, by
Robert Edele, relicensed to LGPL with consent of the author.

Address trac issue #249.

1 files changed, 38 insertions, 0 deletions

diff --git a/libavfilter/lswsutils.h b/libavfilter/lswsutils.h
new file mode 100644
index 0000000000..060048319e
--- /dev/null
+++ b/libavfilter/lswsutils.h
@@ -0,0 +1,38 @@
+/*
+ * 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
+ */
+
+/**
+ * @file
+ * Miscellaneous utilities which make use of the libswscale library
+ */
+
+#ifndef AVFILTER_LSWSUTILS_H
+#define AVFILTER_LSWSUTILS_H
+
+#include "libswscale/swscale.h"
+
+/**
+ * Scale image using libswscale.
+ */
+int ff_scale_image(uint8_t *dst_data[4], int dst_linesize[4],
+                   int dst_w, int dst_h, enum PixelFormat dst_pix_fmt,
+                   uint8_t *const src_data[4], int src_linesize[4],
+                   int src_w, int src_h, enum PixelFormat src_pix_fmt,
+                   void *log_ctx);
+
+#endif  /* AVFILTER_LSWSUTILS_H */