sdk/filter_skeleton.c

   1 //////////////////////////////////////////
   2 // This file contains a simple filter
   3 // skeleton you can use to get started.
   4 // With no changes it simply passes
   5 // frames through.
   6
   7 #include "VapourSynth.h"
   8 #include "VapourSynth.h"
   9
  10 typedef struct {
  11     const VSNodeRef *node;
  12     VSVideoInfo *vi;
  13 } FilterData;
  14
  15 static void VS_CC filterInit(VSMap *in, VSMap *out, void **instanceData, VSNode *node, VSCore *core, const VSAPI *vsapi) {
  16     FilterData *d = (FilterData *) * instanceData;
  17     vsapi->setVideoInfo(d->vi, node);
  18 }
  19
  20 static const VSFrameRef *VS_CC filterGetFrame(int n, int activationReason, void **instanceData, void **frameData, VSFrameContext *frameCtx, VSCore *core, const VSAPI *vsapi) {
  21     FilterData *d = (FilterData *) * instanceData;
  22
  23     if (activationReason == arInitial) {
  24         vsapi->requestFrameFilter(n, d->node, frameCtx);
  25     } else if (activationReason == arAllFramesReady) {
  26         const VSFrameRef *frame = vsapi->getFrameFilter(n, d->node, frameCtx);
  27
  28         // your code here...
  29
  30         return frame;
  31     }
  32
  33     return 0;
  34 }
  35
  36 static void VS_CC filterFree(void *instanceData, VSCore *core, const VSAPI *vsapi) {
  37     FilterData *d = (FilterData *)instanceData;
  38     vsapi->freeNode(d->node);
  39     free(d);
  40 }
  41
  42 static void VS_CC filterCreate(const VSMap *in, VSMap *out, void *userData, VSCore *core, const VSAPI *vsapi) {
  43     FilterData d;
  44     FilterData *data;
  45     const VSNodeRef *cref;
  46
  47     d.node = vsapi->propGetNode(in, "clip", 0, 0);
  48     d.vi = vsapi->getVideoInfo(d.node);
  49
  50     data = malloc(sizeof(d));
  51     *data = d;
  52
  53     cref = vsapi->createFilter(in, out, "Filter", filterInit, filterGetFrame, filterFree, fmParallel, 0, data, core);
  54     vsapi->propSetNode(out, "clip", cref, 0);
  55     vsapi->freeNode(cref);
  56     return;
  57 }
  58
  59 //////////////////////////////////////////
  60 // Init
  61
  62 void VS_CC filterlibInitialize(VSConfigPlugin configFunc, VSRegisterFunction registerFunc, VSPlugin *plugin) {
  63     configFunc("com.example.filter", "filter", "VapourSynth Filter Skeleton", VAPOURSYNTH_API_VERSION, 1, plugin);
  64     registerFunc("Filter", "clip:clip;", filterCreate, 0, plugin);
  65 }