lavfi: port MP swapuv filter

(cherry picked from commit fa35d880aab1d3ef2b828cae640e43d370e8f0c2)

Conflicts:

	Changelog
	libavfilter/version.h

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

6 files changed, 101 insertions, 1 deletions

diff --git a/Changelog b/Changelog
index 464ba958c9..a22b9d76f8 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,8 @@ version next:
 
 version 0.10.1
 
+- swapuv filter
+
 - Several bugs and crashes have been fixed in the following codecs: AAC,
   AC-3, ADPCM, AMR (both NB and WB), ATRAC3, CAVC, Cook, camstudio, DCA,
   DPCM, DSI CIN, DV, EA TGQ, FLAC, fraps, G.722 (both encoder and
diff --git a/doc/filters.texi b/doc/filters.texi
index 7d008bc736..43eec40d16 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -2549,6 +2549,9 @@ For example:
 will create two separate outputs from the same input, one cropped and
 one padded.
 
+@section swapuv
+Swap U & V plane.
+
 @section thumbnail
 Select the most representative frame in a given sequence of consecutive frames.
 
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 01a1316434..82407e2593 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -85,6 +85,7 @@ OBJS-$(CONFIG_SETTB_FILTER)                  += vf_settb.o
 OBJS-$(CONFIG_SHOWINFO_FILTER)               += vf_showinfo.o
 OBJS-$(CONFIG_SLICIFY_FILTER)                += vf_slicify.o
 OBJS-$(CONFIG_SPLIT_FILTER)                  += vf_split.o
+OBJS-$(CONFIG_SWAPUV_FILTER)                 += vf_swapuv.o
 OBJS-$(CONFIG_THUMBNAIL_FILTER)              += vf_thumbnail.o
 OBJS-$(CONFIG_TINTERLACE_FILTER)             += vf_tinterlace.o
 OBJS-$(CONFIG_TRANSPOSE_FILTER)              += vf_transpose.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 8286d4d21b..ef99298cb6 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -93,6 +93,7 @@ void avfilter_register_all(void)
     REGISTER_FILTER (SHOWINFO,    showinfo,    vf);
     REGISTER_FILTER (SLICIFY,     slicify,     vf);
     REGISTER_FILTER (SPLIT,       split,       vf);
+    REGISTER_FILTER (SWAPUV,      swapuv,      vf);
     REGISTER_FILTER (THUMBNAIL,   thumbnail,   vf);
     REGISTER_FILTER (TINTERLACE,  tinterlace,  vf);
     REGISTER_FILTER (TRANSPOSE,   transpose,   vf);
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 60e496dcc0..cd8bd95037 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,7 +29,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  2
-#define LIBAVFILTER_VERSION_MINOR 60
+#define LIBAVFILTER_VERSION_MINOR 61
 #define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
diff --git a/libavfilter/vf_swapuv.c b/libavfilter/vf_swapuv.c
new file mode 100644
index 0000000000..317485b2f9
--- /dev/null
+++ b/libavfilter/vf_swapuv.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ * swap UV filter
+ */
+
+#include "avfilter.h"
+
+static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
+                                           int w, int h)
+{
+    AVFilterBufferRef *picref =
+        avfilter_default_get_video_buffer(link, perms, w, h);
+    uint8_t *tmp;
+    int tmp2;
+
+    tmp             = picref->data[2];
+    picref->data[2] = picref->data[1];
+    picref->data[1] = tmp;
+
+    tmp2                = picref->linesize[2];
+    picref->linesize[2] = picref->linesize[1];
+    picref->linesize[1] = tmp2;
+
+    return picref;
+}
+
+static void start_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)
+{
+    AVFilterBufferRef *outpicref = avfilter_ref_buffer(inpicref, ~0);
+
+    outpicref->data[1] = inpicref->data[2];
+    outpicref->data[2] = inpicref->data[1];
+
+    outpicref->linesize[1] = inpicref->linesize[2];
+    outpicref->linesize[2] = inpicref->linesize[1];
+
+    avfilter_start_frame(link->dst->outputs[0], outpicref);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+    static const enum PixelFormat pix_fmts[] = {
+        PIX_FMT_YUV420P, PIX_FMT_YUVJ420P, PIX_FMT_YUVA420P,
+        PIX_FMT_YUV444P, PIX_FMT_YUVJ444P,
+        PIX_FMT_YUV440P, PIX_FMT_YUVJ440P,
+        PIX_FMT_YUV422P, PIX_FMT_YUVJ422P,
+        PIX_FMT_YUV411P,
+        PIX_FMT_NONE,
+    };
+
+    avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts));
+    return 0;
+}
+
+AVFilter avfilter_vf_swapuv = {
+    .name      = "swapuv",
+    .description = NULL_IF_CONFIG_SMALL("Swap U and V components."),
+    .priv_size = 0,
+    .query_formats = query_formats,
+
+    .inputs = (const AVFilterPad[]) {
+        { .name             = "default",
+          .type             = AVMEDIA_TYPE_VIDEO,
+          .get_video_buffer = get_video_buffer,
+          .start_frame      = start_frame, },
+        { .name = NULL }
+    },
+    .outputs = (const AVFilterPad[]) {
+        { .name             = "default",
+          .type             = AVMEDIA_TYPE_VIDEO, },
+        { .name             = NULL }
+    },
+};