Add 'nocrop' parameter

If this is set to true, direct rendering will always be used,
and no memcpy will take place, but it will retrurn the frame
with the aligned width and height, which may need cropping,
which constitutes a memcpy in vapoursynth.

If the image has to be cropped anyway, this function can provide
a speedup in the form of less memcpys.

Signed-off-by: Derek Buitenhuis <[email protected]>

vs/d2vsource.cpp

@@ -93,6 +93,8 @@ static void VS_CC d2vCreate(const VSMap *in, VSMap *out, void *userData, VSCore
     d2vData d;
     d2vData *data;
     string msg;
+    bool no_crop;
+    int err;
 
     d.d2v = d2vparse((char *)vsapi->propGetData(in, "input", 0, 0), msg);
     if (!d.d2v) {
@@ -128,6 +130,16 @@ static void VS_CC d2vCreate(const VSMap *in, VSMap *out, void *userData, VSCore
     data->aligned_width  = FFALIGN(data->vi.width, 16);
     data->aligned_height = FFALIGN(data->vi.height, 32);
 
+    /* See if nocrop is enabled, and set the width/height accordingly. */
+    no_crop = !!vsapi->propGetInt(in, "nocrop", 0, &err);
+    if (err)
+        no_crop = false;
+
+    if (no_crop) {
+        data->vi.width  = data->aligned_width;
+        data->vi.height = data->aligned_height;
+    }
+
     /*
      * Make our private data available to libavcodec, and
      * set our custom get/release_buffer funcs.
@@ -148,5 +160,5 @@ static void VS_CC d2vCreate(const VSMap *in, VSMap *out, void *userData, VSCore
 
 VS_EXTERNAL_API(void) VapourSynthPluginInit(VSConfigPlugin configFunc, VSRegisterFunction registerFunc, VSPlugin *plugin) {
     configFunc("com.sources.d2vsource", "d2v", "D2V Source", VAPOURSYNTH_API_VERSION, 1, plugin);
-    registerFunc("Source", "input:data;", d2vCreate, 0, plugin);
+    registerFunc("Source", "input:data;nocrop:int:opt;", d2vCreate, 0, plugin);
 }