display size/aspect adjusting filter

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@10007 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 66 insertions, 0 deletions

diff --git a/libmpcodecs/vf_dsize.c b/libmpcodecs/vf_dsize.c
new file mode 100644
index 0000000000..7806dc81d3
--- /dev/null
+++ b/libmpcodecs/vf_dsize.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <inttypes.h>
+
+#include "../config.h"
+#include "../mp_msg.h"
+
+#include "img_format.h"
+#include "mp_image.h"
+#include "vf.h"
+
+struct vf_priv_s {
+	int w, h;
+	float aspect;
+};
+
+static int config(struct vf_instance_s* vf,
+	int width, int height, int d_width, int d_height,
+	unsigned int flags, unsigned int outfmt)
+{
+	if (vf->priv->w && vf->priv->h) {
+		d_width = vf->priv->w;
+		d_height = vf->priv->h;
+	} else {
+		if (vf->priv->aspect * height > width) {
+			d_width = height * vf->priv->aspect;
+			d_height = height;
+		} else {
+			d_height = width / vf->priv->aspect;
+			d_width = width;
+		}
+	}
+	return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
+}
+
+static int open(vf_instance_t *vf, char* args)
+{
+	vf->config = config;
+	vf->draw_slice = vf_next_draw_slice;
+	//vf->default_caps = 0;
+	vf->priv = calloc(sizeof(struct vf_priv_s), 1);
+	vf->priv->aspect = 4.0/3.0;
+	if (args) {
+		if (strchr(args, '/')) {
+			int w, h;
+			sscanf(args, "%d/%d", &w, &h);
+			vf->priv->aspect = (float)w/h;
+		} else if (strchr(args, '.')) {
+			sscanf(args, "%f", &vf->priv->aspect);
+		} else {
+			sscanf(args, "%d:%d", &vf->priv->w, &vf->priv->h);
+		}
+	}
+	return 1;
+}
+
+vf_info_t vf_info_dsize = {
+    "reset displaysize/aspect",
+    "dsize",
+    "Rich Felker",
+    "",
+    open,
+    NULL
+};
+