1 files changed, 58 insertions, 0 deletions
diff --git a/libavfilter/interlace.h b/libavfilter/interlace.h
new file mode 100644
index 0000000000..44f1e06b39
--- /dev/null
+++ b/libavfilter/interlace.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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ * progressive to interlaced content filter, inspired by heavy debugging of
+ * tinterlace filter.
+ */
+
+#ifndef AVFILTER_INTERLACE_H
+#define AVFILTER_INTERLACE_H
+
+#include "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/opt.h"
+
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+enum ScanMode {
+    MODE_TFF = 0,
+    MODE_BFF = 1,
+};
+
+enum FieldType {
+    FIELD_UPPER = 0,
+    FIELD_LOWER = 1,
+};
+
+typedef struct InterlaceContext {
+    const AVClass *class;
+    enum ScanMode scan;    // top or bottom field first scanning
+    int lowpass;           // enable or disable low pass filterning
+    AVFrame *cur, *next;   // the two frames from which the new one is obtained
+    void (*lowpass_line)(uint8_t *dstp, ptrdiff_t linesize, const uint8_t *srcp,
+                         const uint8_t *srcp_above, const uint8_t *srcp_below);
+} InterlaceContext;
+
+void ff_interlace_init_x86(InterlaceContext *interlace);
+
+#endif /* AVFILTER_INTERLACE_H */