1 files changed, 92 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_harddup.c b/libavfilter/libmpcodecs/vf_harddup.c
new file mode 100644
index 0000000..5b6c2ff
--- /dev/null
+++ b/libavfilter/libmpcodecs/vf_harddup.c
@@ -0,0 +1,92 @@
+/*
+ * This file is part of MPlayer.
+ *
+ * MPlayer 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.
+ *
+ * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "config.h"
+#include "mp_msg.h"
+
+#include "img_format.h"
+#include "mp_image.h"
+#include "vf.h"
+
+struct vf_priv_s {
+    mp_image_t *last_mpi;
+};
+
+static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
+{
+    mp_image_t *dmpi;
+
+    vf->priv->last_mpi = mpi;
+
+    dmpi = vf_get_image(vf->next, mpi->imgfmt,
+        MP_IMGTYPE_EXPORT, 0, mpi->width, mpi->height);
+
+    dmpi->planes[0] = mpi->planes[0];
+    dmpi->stride[0] = mpi->stride[0];
+    if (dmpi->flags&MP_IMGFLAG_PLANAR) {
+        dmpi->planes[1] = mpi->planes[1];
+        dmpi->stride[1] = mpi->stride[1];
+        dmpi->planes[2] = mpi->planes[2];
+        dmpi->stride[2] = mpi->stride[2];
+    }
+
+    return vf_next_put_image(vf, dmpi, pts);
+}
+
+static int control(struct vf_instance *vf, int request, void* data)
+{
+    switch (request) {
+    case VFCTRL_DUPLICATE_FRAME:
+        if (!vf->priv->last_mpi) break;
+        // This is a huge hack. We assume nothing
+        // has been called earlier in the filter chain
+        // since the last put_image. This is reasonable
+        // because we're handling a duplicate frame!
+        if (put_image(vf, vf->priv->last_mpi, MP_NOPTS_VALUE))
+            return CONTROL_TRUE;
+        break;
+    }
+    return vf_next_control(vf, request, data);
+}
+
+static void uninit(struct vf_instance *vf)
+{
+    free(vf->priv);
+}
+
+static int vf_open(vf_instance_t *vf, char *args)
+{
+    vf->put_image = put_image;
+    vf->control = control;
+    vf->uninit = uninit;
+    vf->priv = calloc(1, sizeof(struct vf_priv_s));
+    return 1;
+}
+
+const vf_info_t vf_info_harddup = {
+    "resubmit duplicate frames for encoding",
+    "harddup",
+    "Rich Felker",
+    "",
+    vf_open,
+    NULL
+};