lavfi: add split filter from soc.

Some fixes by Stefano.
For detailed authorship see SOC repo

Signed-off-by: Anton Khirnov <anton@khirnov.net>

1 files changed, 66 insertions, 0 deletions

diff --git a/libavfilter/vf_split.c b/libavfilter/vf_split.c
new file mode 100644
index 0000000000..54fdd21588
--- /dev/null
+++ b/libavfilter/vf_split.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * Video splitter
+ */
+
+#include "avfilter.h"
+
+static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
+{
+    avfilter_start_frame(inlink->dst->outputs[0],
+                         avfilter_ref_buffer(picref, ~AV_PERM_WRITE));
+    avfilter_start_frame(inlink->dst->outputs[1],
+                         avfilter_ref_buffer(picref, ~AV_PERM_WRITE));
+}
+
+static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
+{
+    avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
+    avfilter_draw_slice(inlink->dst->outputs[1], y, h, slice_dir);
+}
+
+static void end_frame(AVFilterLink *inlink)
+{
+    avfilter_end_frame(inlink->dst->outputs[0]);
+    avfilter_end_frame(inlink->dst->outputs[1]);
+
+    avfilter_unref_buffer(inlink->cur_buf);
+}
+
+AVFilter avfilter_vf_split = {
+    .name      = "split",
+    .description = NULL_IF_CONFIG_SMALL("Pass on the input to two outputs."),
+
+    .inputs    = (AVFilterPad[]) {{ .name            = "default",
+                                    .type            = AVMEDIA_TYPE_VIDEO,
+                                    .get_video_buffer= avfilter_null_get_video_buffer,
+                                    .start_frame     = start_frame,
+                                    .draw_slice      = draw_slice,
+                                    .end_frame       = end_frame, },
+                                  { .name = NULL}},
+    .outputs   = (AVFilterPad[]) {{ .name            = "output1",
+                                    .type            = AVMEDIA_TYPE_VIDEO, },
+                                  { .name            = "output2",
+                                    .type            = AVMEDIA_TYPE_VIDEO, },
+                                  { .name = NULL}},
+};