1 files changed, 91 insertions, 0 deletions
diff --git a/libavfilter/vf_swapuv.c b/libavfilter/vf_swapuv.c
new file mode 100644
index 0000000000..e7e5e88abd
--- /dev/null
+++ b/libavfilter/vf_swapuv.c
@@ -0,0 +1,91 @@
+/*
+ * 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"
+#include "formats.h"
+#include "internal.h"
+#include "video.h"
+
+static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
+                                           int w, int h)
+{
+    AVFilterBufferRef *picref =
+        ff_default_get_video_buffer(link, perms, w, h);
+
+    FFSWAP(uint8_t*, picref->data[1], picref->data[2]);
+    FFSWAP(int, picref->linesize[1], picref->linesize[2]);
+
+    return picref;
+}
+
+static int filter_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)
+{
+    FFSWAP(uint8_t*, inpicref->data[1], inpicref->data[2]);
+    FFSWAP(int, inpicref->linesize[1], inpicref->linesize[2]);
+
+    return ff_filter_frame(link->dst->outputs[0], inpicref);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+    static const enum AVPixelFormat pix_fmts[] = {
+        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVA420P,
+        AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P,
+        AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
+        AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
+        AV_PIX_FMT_YUV411P,
+        AV_PIX_FMT_NONE,
+    };
+
+    ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+    return 0;
+}
+
+static const AVFilterPad swapuv_inputs[] = {
+    {
+        .name             = "default",
+        .type             = AVMEDIA_TYPE_VIDEO,
+        .get_video_buffer = get_video_buffer,
+        .filter_frame     = filter_frame,
+    },
+    { NULL }
+};
+
+static const AVFilterPad swapuv_outputs[] = {
+    {
+        .name = "default",
+        .type = AVMEDIA_TYPE_VIDEO,
+    },
+    { NULL }
+};
+
+AVFilter avfilter_vf_swapuv = {
+    .name      = "swapuv",
+    .description = NULL_IF_CONFIG_SMALL("Swap U and V components."),
+    .priv_size = 0,
+    .query_formats = query_formats,
+    .inputs        = swapuv_inputs,
+    .outputs       = swapuv_outputs,
+};