avfilter/vf_idet: MMX/MMXEXT/SSE2 implementation of idet's filter_line()

integration by Neil Birkbeck, with help from Vitor Sessak.
core SSE2 loop by Skal (pascal.massimino@gmail.com)

Reviewed-by: Clément Bœsch <u@pkh.me>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 58 insertions, 0 deletions

diff --git a/libavfilter/vf_idet.h b/libavfilter/vf_idet.h
new file mode 100644
index 0000000000..3820e94e18
--- /dev/null
+++ b/libavfilter/vf_idet.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
+ */
+
+#ifndef AVFILTER_IDET_H
+#define AVFILTER_IDET_H
+
+#include "libavutil/pixdesc.h"
+#include "avfilter.h"
+
+#define HIST_SIZE 4
+
+typedef enum {
+    TFF,
+    BFF,
+    PROGRSSIVE,
+    UNDETERMINED,
+} Type;
+
+typedef struct {
+    const AVClass *class;
+    float interlace_threshold;
+    float progressive_threshold;
+
+    Type last_type;
+    int prestat[4];
+    int poststat[4];
+
+    uint8_t history[HIST_SIZE];
+
+    AVFrame *cur;
+    AVFrame *next;
+    AVFrame *prev;
+    int (*filter_line)(const uint8_t *prev, const uint8_t *cur, const uint8_t *next, int w);
+
+    const AVPixFmtDescriptor *csp;
+} IDETContext;
+
+void ff_idet_init_x86(IDETContext *idet);
+
+/* main fall-back for left-over */
+int ff_idet_filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w);
+
+#endif