VapourSynth.h

/*
* Copyright (c) 2012-2014 Fredrik Mellbin
*
* This file is part of VapourSynth.
*
* VapourSynth 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.
*
* VapourSynth 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 VapourSynth; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#ifndef VAPOURSYNTH_H
#define VAPOURSYNTH_H

#include <stdint.h>

#define VAPOURSYNTH_API_VERSION 3

/* Convenience for C++ users. */
#ifdef __cplusplus
#    define VS_EXTERN_C extern "C"
#else
#    define VS_EXTERN_C
#endif

#if defined(_WIN32) && !defined(_WIN64)
#    define VS_CC __stdcall
#else
#    define VS_CC
#endif

/* And now for some symbol hide-and-seek... */
#if defined(_WIN32) /* Windows being special */
#    define VS_EXTERNAL_API(ret) VS_EXTERN_C __declspec(dllexport) ret VS_CC
#elif defined(__GNUC__) && __GNUC__ >= 4
#    define VS_EXTERNAL_API(ret) VS_EXTERN_C __attribute__((visibility("default"))) ret VS_CC
#else
#    define VS_EXTERNAL_API(ret) VS_EXTERN_C ret VS_CC
#endif

#if !defined(VS_CORE_EXPORTS) && defined(_WIN32)
#    define VS_API(ret) VS_EXTERN_C __declspec(dllimport) ret VS_CC
#else
#    define VS_API(ret) VS_EXTERNAL_API(ret)
#endif

typedef struct VSFrameRef VSFrameRef;
typedef struct VSNodeRef VSNodeRef;
typedef struct VSCore VSCore;
typedef struct VSPlugin VSPlugin;
typedef struct VSNode VSNode;
typedef struct VSFuncRef VSFuncRef;
typedef struct VSMap VSMap;
typedef struct VSAPI VSAPI;
typedef struct VSFrameContext VSFrameContext;

typedef enum VSColorFamily {
    /* all planar formats */
    cmGray   = 1000000,
    cmRGB    = 2000000,
    cmYUV    = 3000000,
    cmYCoCg  = 4000000,
    /* special for compatibility */
    cmCompat = 9000000
} VSColorFamily;

typedef enum VSSampleType {
    stInteger = 0,
    stFloat = 1
} VSSampleType;

/* The +10 is so people won't be using the constants interchangably "by accident" */
typedef enum VSPresetFormat {
    pfNone = 0,

    pfGray8 = cmGray + 10,
    pfGray16,

    pfGrayH,
    pfGrayS,

    pfYUV420P8 = cmYUV + 10,
    pfYUV422P8,
    pfYUV444P8,
    pfYUV410P8,
    pfYUV411P8,
    pfYUV440P8,

    pfYUV420P9,
    pfYUV422P9,
    pfYUV444P9,

    pfYUV420P10,
    pfYUV422P10,
    pfYUV444P10,

    pfYUV420P16,
    pfYUV422P16,
    pfYUV444P16,

    pfYUV444PH,
    pfYUV444PS,

    pfRGB24 = cmRGB + 10,
    pfRGB27,
    pfRGB30,
    pfRGB48,

    pfRGBH,
    pfRGBS,

    /* special for compatibility, if you implement these in any filter I'll personally kill you */
    /* I'll also change their ids around to break your stuff regularly */
    pfCompatBGR32 = cmCompat + 10,
    pfCompatYUY2
} VSPresetFormat;

typedef enum VSFilterMode {
    fmParallel = 100, /* completely parallel execution */
    fmParallelRequests = 200, /* for filters that are serial in nature but can request one or more frames they need in advance */
    fmUnordered = 300, /* for filters that modify their internal state every request */
    fmSerial = 400 /* for source filters and compatibility with other filtering architectures */
} VSFilterMode;

typedef struct VSFormat {
    char name[32];
    int id;
    int colorFamily; /* see VSColorFamily */
    int sampleType; /* see VSSampleType */
    int bitsPerSample; /* number of significant bits */
    int bytesPerSample; /* actual storage is always in a power of 2 and the smallest possible that can fit the number of bits used per sample */

    int subSamplingW; /* log2 subsampling factor, applied to second and third plane */
    int subSamplingH;

    int numPlanes; /* implicit from colorFamily */
} VSFormat;

typedef enum VSNodeFlags {
    nfNoCache = 1,
    nfIsCache = 2
} VSNodeFlags;

typedef enum VSPropTypes {
    ptUnset = 'u',
    ptInt = 'i',
    ptFloat = 'f',
    ptData = 's',
    ptNode = 'c',
    ptFrame = 'v',
    ptFunction = 'm'
} VSPropTypes;

typedef enum VSGetPropErrors {
    peUnset = 1,
    peType  = 2,
    peIndex = 4
} VSGetPropErrors;

typedef enum VSPropAppendMode {
    paReplace = 0,
    paAppend  = 1,
    paTouch   = 2
} VSPropAppendMode;

typedef struct VSCoreInfo {
    const char *versionString;
    int core;
    int api;
    int numThreads;
    int64_t maxFramebufferSize;
    int64_t usedFramebufferSize;
} VSCoreInfo;

typedef struct VSVideoInfo {
    const VSFormat *format;
    int64_t fpsNum;
    int64_t fpsDen;
    int width;
    int height;
    int numFrames;
    int flags;
} VSVideoInfo;

typedef enum VSActivationReason {
    arInitial = 0,
    arFrameReady = 1,
    arAllFramesReady = 2,
    arError = -1
} VSActivationReason;

typedef enum VSMessageType {
    mtDebug = 0,
    mtWarning = 1,
    mtCritical = 2,
    mtFatal = 3
} VSMessageType;

/* core function typedefs */
typedef const VSAPI *(VS_CC *VSGetVapourSynthAPI)(int version);
typedef VSCore *(VS_CC *VSCreateCore)(int threads);
typedef void (VS_CC *VSFreeCore)(VSCore *core);
typedef const VSCoreInfo *(VS_CC *VSGetCoreInfo)(VSCore *core);

/* function/filter typedefs */
typedef void (VS_CC *VSPublicFunction)(const VSMap *in, VSMap *out, void *userData, VSCore *core, const VSAPI *vsapi);
typedef void (VS_CC *VSFreeFuncData)(void *userData);
typedef void (VS_CC *VSFilterInit)(VSMap *in, VSMap *out, void **instanceData, VSNode *node, VSCore *core, const VSAPI *vsapi);
typedef const VSFrameRef *(VS_CC *VSFilterGetFrame)(int n, int activationReason, void **instanceData, void **frameData, VSFrameContext *frameCtx, VSCore *core, const VSAPI *vsapi);
typedef int (VS_CC *VSGetOutputIndex)(VSFrameContext *frameCtx);
typedef void (VS_CC *VSFilterFree)(void *instanceData, VSCore *core, const VSAPI *vsapi);
typedef void (VS_CC *VSRegisterFunction)(const char *name, const char *args, VSPublicFunction argsFunc, void *functionData, VSPlugin *plugin);
typedef void (VS_CC *VSCreateFilter)(const VSMap *in, VSMap *out, const char *name, VSFilterInit init, VSFilterGetFrame getFrame, VSFilterFree free, int filterMode, int flags, void *instanceData, VSCore *core);
typedef VSMap *(VS_CC *VSInvoke)(VSPlugin *plugin, const char *name, const VSMap *args);
typedef void (VS_CC *VSSetError)(VSMap *map, const char *errorMessage);
typedef const char *(VS_CC *VSGetError)(const VSMap *map);
typedef void (VS_CC *VSSetFilterError)(const char *errorMessage, VSFrameContext *frameCtx);

typedef const VSFormat *(VS_CC *VSGetFormatPreset)(int id, VSCore *core);
typedef const VSFormat *(VS_CC *VSRegisterFormat)(int colorFamily, int sampleType, int bitsPerSample, int subSamplingW, int subSamplingH, VSCore *core);

/* frame and clip handling */
typedef void (VS_CC *VSFrameDoneCallback)(void *userData, const VSFrameRef *f, int n, VSNodeRef *, const char *errorMsg);
typedef void (VS_CC *VSGetFrameAsync)(int n, VSNodeRef *node, VSFrameDoneCallback callback, void *userData);
typedef const VSFrameRef *(VS_CC *VSGetFrame)(int n, VSNodeRef *node, char *errorMsg, int bufSize);
typedef void (VS_CC *VSRequestFrameFilter)(int n, VSNodeRef *node, VSFrameContext *frameCtx);
typedef const VSFrameRef *(VS_CC *VSGetFrameFilter)(int n, VSNodeRef *node, VSFrameContext *frameCtx);
typedef const VSFrameRef *(VS_CC *VSCloneFrameRef)(const VSFrameRef *f);
typedef VSNodeRef *(VS_CC *VSCloneNodeRef)(VSNodeRef *node);
typedef VSFuncRef *(VS_CC *VSCloneFuncRef)(VSFuncRef *f);
typedef void (VS_CC *VSFreeFrame)(const VSFrameRef *f);
typedef void (VS_CC *VSFreeNode)(VSNodeRef *node);
typedef void (VS_CC *VSFreeFunc)(VSFuncRef *f);
typedef VSFrameRef *(VS_CC *VSNewVideoFrame)(const VSFormat *format, int width, int height, const VSFrameRef *propSrc, VSCore *core);
typedef VSFrameRef *(VS_CC *VSNewVideoFrame2)(const VSFormat *format, int width, int height, const VSFrameRef **planeSrc, const int *planes, const VSFrameRef *propSrc, VSCore *core);
typedef VSFrameRef *(VS_CC *VSCopyFrame)(const VSFrameRef *f, VSCore *core);
typedef void (VS_CC *VSCopyFrameProps)(const VSFrameRef *src, VSFrameRef *dst, VSCore *core);
typedef int (VS_CC *VSGetStride)(const VSFrameRef *f, int plane);
typedef const uint8_t *(VS_CC *VSGetReadPtr)(const VSFrameRef *f, int plane);
typedef uint8_t *(VS_CC *VSGetWritePtr)(VSFrameRef *f, int plane);

/* property access */
typedef const VSVideoInfo *(VS_CC *VSGetVideoInfo)(VSNodeRef *node);
typedef void (VS_CC *VSSetVideoInfo)(const VSVideoInfo *vi, int numOutputs, VSNode *node);
typedef const VSFormat *(VS_CC *VSGetFrameFormat)(const VSFrameRef *f);
typedef int (VS_CC *VSGetFrameWidth)(const VSFrameRef *f, int plane);
typedef int (VS_CC *VSGetFrameHeight)(const VSFrameRef *f, int plane);
typedef const VSMap *(VS_CC *VSGetFramePropsRO)(const VSFrameRef *f);
typedef VSMap *(VS_CC *VSGetFramePropsRW)(VSFrameRef *f);
typedef int (VS_CC *VSPropNumKeys)(const VSMap *map);
typedef const char *(VS_CC *VSPropGetKey)(const VSMap *map, int index);
typedef int (VS_CC *VSPropNumElements)(const VSMap *map, const char *key);
typedef char(VS_CC *VSPropGetType)(const VSMap *map, const char *key);

typedef VSMap *(VS_CC *VSCreateMap)(void);
typedef void (VS_CC *VSFreeMap)(VSMap *map);
typedef void (VS_CC *VSClearMap)(VSMap *map);

typedef int64_t (VS_CC *VSPropGetInt)(const VSMap *map, const char *key, int index, int *error);
typedef double(VS_CC *VSPropGetFloat)(const VSMap *map, const char *key, int index, int *error);
typedef const char *(VS_CC *VSPropGetData)(const VSMap *map, const char *key, int index, int *error);
typedef int (VS_CC *VSPropGetDataSize)(const VSMap *map, const char *key, int index, int *error);
typedef VSNodeRef *(VS_CC *VSPropGetNode)(const VSMap *map, const char *key, int index, int *error);
typedef const VSFrameRef *(VS_CC *VSPropGetFrame)(const VSMap *map, const char *key, int index, int *error);
typedef VSFuncRef *(VS_CC *VSPropGetFunc)(const VSMap *map, const char *key, int index, int *error);

typedef int (VS_CC *VSPropDeleteKey)(VSMap *map, const char *key);
typedef int (VS_CC *VSPropSetInt)(VSMap *map, const char *key, int64_t i, int append);
typedef int (VS_CC *VSPropSetFloat)(VSMap *map, const char *key, double d, int append);
typedef int (VS_CC *VSPropSetData)(VSMap *map, const char *key, const char *data, int size, int append);
typedef int (VS_CC *VSPropSetNode)(VSMap *map, const char *key, VSNodeRef *node, int append);
typedef int (VS_CC *VSPropSetFrame)(VSMap *map, const char *key, const VSFrameRef *f, int append);
typedef int (VS_CC *VSPropSetFunc)(VSMap *map, const char *key, VSFuncRef *func, int append);

/* mixed */
typedef void (VS_CC *VSConfigPlugin)(const char *identifier, const char *defaultNamespace, const char *name, int apiVersion, int readonly, VSPlugin *plugin);
typedef void (VS_CC *VSInitPlugin)(VSConfigPlugin configFunc, VSRegisterFunction registerFunc, VSPlugin *plugin);

typedef VSPlugin *(VS_CC *VSGetPluginById)(const char *identifier, VSCore *core);
typedef VSPlugin *(VS_CC *VSGetPluginByNs)(const char *ns, VSCore *core);

typedef VSMap *(VS_CC *VSGetPlugins)(VSCore *core);
typedef VSMap *(VS_CC *VSGetFunctions)(VSPlugin *plugin);

typedef void (VS_CC *VSCallFunc)(VSFuncRef *func, const VSMap *in, VSMap *out, VSCore *core, const VSAPI *vsapi); /* core and vsapi arguments are completely ignored, they only remain to preserve ABI */
typedef VSFuncRef *(VS_CC *VSCreateFunc)(VSPublicFunction func, void *userData, VSFreeFuncData free, VSCore *core, const VSAPI *vsapi);

typedef void (VS_CC *VSQueryCompletedFrame)(VSNodeRef **node, int *n, VSFrameContext *frameCtx);
typedef void (VS_CC *VSReleaseFrameEarly)(VSNodeRef *node, int n, VSFrameContext *frameCtx);

typedef int64_t (VS_CC *VSSetMaxCacheSize)(int64_t bytes, VSCore *core);
typedef int (VS_CC *VSSetThreadCount)(int threads, VSCore *core);

typedef void (VS_CC *VSMessageHandler)(int msgType, const char *msg, void *userData);
typedef void (VS_CC *VSSetMessageHandler)(VSMessageHandler handler, void *userData);

typedef const char *(VS_CC *VSGetPluginPath)(const VSPlugin *plugin);

struct VSAPI {
    VSCreateCore createCore;
    VSFreeCore freeCore;
    VSGetCoreInfo getCoreInfo;

    VSCloneFrameRef cloneFrameRef;
    VSCloneNodeRef cloneNodeRef;
    VSCloneFuncRef cloneFuncRef;

    VSFreeFrame freeFrame;
    VSFreeNode freeNode;
    VSFreeFunc freeFunc;

    VSNewVideoFrame newVideoFrame;
    VSCopyFrame copyFrame;
    VSCopyFrameProps copyFrameProps;

    VSRegisterFunction registerFunction;
    VSGetPluginById getPluginById;
    VSGetPluginByNs getPluginByNs;
    VSGetPlugins getPlugins;
    VSGetFunctions getFunctions;
    VSCreateFilter createFilter;
    VSSetError setError; /* use to signal errors outside filter getframe functions */
    VSGetError getError; /* use to query errors, returns 0 if no error */
    VSSetFilterError setFilterError; /* use to signal errors in the filter getframe function */
    VSInvoke invoke; /* may not be used inside a filter's getframe method */

    VSGetFormatPreset getFormatPreset; /* threadsafe */
    VSRegisterFormat registerFormat; /* threadsafe */

    VSGetFrame getFrame; /* do never use inside a filter's getframe function, for external applications using the core as a library or for requesting frames in a filter constructor */
    VSGetFrameAsync getFrameAsync; /* do never use inside a filter's getframe function, for external applications using the core as a library or for requesting frames in a filter constructor */
    VSGetFrameFilter getFrameFilter; /* only use inside a filter's getframe function */
    VSRequestFrameFilter requestFrameFilter; /* only use inside a filter's getframe function */
    VSQueryCompletedFrame queryCompletedFrame; /* only use inside a filter's getframe function */
    VSReleaseFrameEarly releaseFrameEarly; /* only use inside a filter's getframe function */

    VSGetStride getStride;
    VSGetReadPtr getReadPtr;
    VSGetWritePtr getWritePtr;

    VSCreateFunc createFunc;
    VSCallFunc callFunc;

    /* property access functions */
    VSCreateMap createMap;
    VSFreeMap freeMap;
    VSClearMap clearMap;

    VSGetVideoInfo getVideoInfo;
    VSSetVideoInfo setVideoInfo;
    VSGetFrameFormat getFrameFormat;
    VSGetFrameWidth getFrameWidth;
    VSGetFrameHeight getFrameHeight;
    VSGetFramePropsRO getFramePropsRO;
    VSGetFramePropsRW getFramePropsRW;

    VSPropNumKeys propNumKeys;
    VSPropGetKey propGetKey;
    VSPropNumElements propNumElements;
    VSPropGetType propGetType;
    VSPropGetInt propGetInt;
    VSPropGetFloat propGetFloat;
    VSPropGetData propGetData;
    VSPropGetDataSize propGetDataSize;
    VSPropGetNode propGetNode;
    VSPropGetFrame propGetFrame;
    VSPropGetFunc propGetFunc;

    VSPropDeleteKey propDeleteKey;
    VSPropSetInt propSetInt;
    VSPropSetFloat propSetFloat;
    VSPropSetData propSetData;
    VSPropSetNode propSetNode;
    VSPropSetFrame propSetFrame;
    VSPropSetFunc propSetFunc;

    VSSetMaxCacheSize setMaxCacheSize;
    VSGetOutputIndex getOutputIndex;
    VSNewVideoFrame2 newVideoFrame2;

    VSSetMessageHandler setMessageHandler;
    VSSetThreadCount setThreadCount;

    VSGetPluginPath getPluginPath;
};

VS_API(const VSAPI *) getVapourSynthAPI(int version);

#endif /* VAPOURSYNTH_H */