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Add a public C API to the library

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Add a struct that matches the C++ interface vtable.

This requires that the C++ interface methods are declared to use
the same calling convention as normal C functions, and that the
C struct exactly matches the layout and ordering of the C++
virtual table - MSVC seemed to reorder methods if there were
overloaded methods.
This commit is contained in:
Martin Storsjö 2014-01-21 16:12:57 +02:00
parent dd0db820fc
commit 043575ffb0
3 changed files with 131 additions and 64 deletions
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131
codec/api/svc/codec_api.h
View File

@ -36,36 +36,43 @@
#include "codec_app_def.h" #include "codec_app_def.h"
#include "codec_def.h" #include "codec_def.h"
#if defined(_WIN32) || defined(__cdecl)
#define EXTAPI __cdecl
#else
#define EXTAPI
#endif
#ifdef __cplusplus
class ISVCEncoder { class ISVCEncoder {
public: public:
/* /*
* return: CM_RETURN: 0 - success; otherwise - failed; * return: CM_RETURN: 0 - success; otherwise - failed;
*/ */
virtual int Initialize (SVCEncodingParam* pParam, const INIT_TYPE kiInitType = INIT_TYPE_PARAMETER_BASED) = 0; virtual int EXTAPI Initialize (SVCEncodingParam* pParam, const INIT_TYPE kiInitType = INIT_TYPE_PARAMETER_BASED) = 0;
virtual int Initialize2 (void* pParam, const INIT_TYPE kiInitType = INIT_TYPE_CONFIG_BASED) = 0; virtual int EXTAPI Initialize2 (void* pParam, const INIT_TYPE kiInitType = INIT_TYPE_CONFIG_BASED) = 0;
virtual int Uninitialize() = 0; virtual int EXTAPI Uninitialize() = 0;
/* /*
* return: EVideoFrameType [IDR: videoFrameTypeIDR; P: videoFrameTypeP; ERROR: videoFrameTypeInvalid] * return: EVideoFrameType [IDR: videoFrameTypeIDR; P: videoFrameTypeP; ERROR: videoFrameTypeInvalid]
*/ */
virtual int EncodeFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo) = 0; virtual int EXTAPI EncodeFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo) = 0;
virtual int EncodeFrame2 (const SSourcePicture** kppSrcPicList, int nSrcPicNum, SFrameBSInfo* pBsInfo) = 0; virtual int EXTAPI EncodeFrame2 (const SSourcePicture** kppSrcPicList, int nSrcPicNum, SFrameBSInfo* pBsInfo) = 0;
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int EncodeParameterSets (SFrameBSInfo* pBsInfo) = 0; virtual int EXTAPI EncodeParameterSets (SFrameBSInfo* pBsInfo) = 0;
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int PauseFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo) = 0; virtual int EXTAPI PauseFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo) = 0;
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int ForceIntraFrame (bool bIDR) = 0; virtual int EXTAPI ForceIntraFrame (bool bIDR) = 0;
/************************************************************************ /************************************************************************
* InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,.. * InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,..
@ -73,58 +80,118 @@ class ISVCEncoder {
/* /*
* return: CM_RETURN: 0 - success; otherwise - failed; * return: CM_RETURN: 0 - success; otherwise - failed;
*/ */
virtual int SetOption (ENCODER_OPTION eOptionId, void* pOption) = 0; virtual int EXTAPI SetOption (ENCODER_OPTION eOptionId, void* pOption) = 0;
virtual int GetOption (ENCODER_OPTION eOptionId, void* pOption) = 0; virtual int EXTAPI GetOption (ENCODER_OPTION eOptionId, void* pOption) = 0;
}; };
class ISVCDecoder { class ISVCDecoder {
public: public:
virtual long Initialize (void* pParam, const INIT_TYPE iInitType) = 0; virtual long EXTAPI Initialize (void* pParam, const INIT_TYPE iInitType) = 0;
virtual long Uninitialize() = 0; virtual long EXTAPI Uninitialize() = 0;
virtual DECODING_STATE DecodeFrame (const unsigned char* pSrc, virtual DECODING_STATE EXTAPI DecodeFrame (const unsigned char* pSrc,
const int iSrcLen, const int iSrcLen,
unsigned char** ppDst, unsigned char** ppDst,
int* pStride, int* pStride,
int& iWidth, int& iWidth,
int& iHeight) = 0; int& iHeight) = 0;
/* /*
* src must be 4 byte aligned, recommend 16 byte aligned. the available src size must be multiple of 4. * src must be 4 byte aligned, recommend 16 byte aligned. the available src size must be multiple of 4.
*/ */
virtual DECODING_STATE DecodeFrame2 (const unsigned char* pSrc, virtual DECODING_STATE EXTAPI DecodeFrame2 (const unsigned char* pSrc,
const int iSrcLen, const int iSrcLen,
void** ppDst, void** ppDst,
SBufferInfo* pDstInfo) = 0; SBufferInfo* pDstInfo) = 0;
/* /*
* src must be 4 byte aligned, recommend 16 byte aligned. the available src size must be multiple of 4. * src must be 4 byte aligned, recommend 16 byte aligned. the available src size must be multiple of 4.
* this API does not work for now!! This is for future use to support non-I420 color format output. * this API does not work for now!! This is for future use to support non-I420 color format output.
*/ */
virtual DECODING_STATE DecodeFrameEx (const unsigned char* pSrc, virtual DECODING_STATE EXTAPI DecodeFrameEx (const unsigned char* pSrc,
const int iSrcLen, const int iSrcLen,
unsigned char* pDst, unsigned char* pDst,
int iDstStride, int iDstStride,
int& iDstLen, int& iDstLen,
int& iWidth, int& iWidth,
int& iHeight, int& iHeight,
int& iColorFormat) = 0; int& iColorFormat) = 0;
/************************************************************************* /*************************************************************************
* OutDataFormat * OutDataFormat
*************************************************************************/ *************************************************************************/
virtual long SetOption (DECODER_OPTION eOptionId, void* pOption) = 0; virtual long EXTAPI SetOption (DECODER_OPTION eOptionId, void* pOption) = 0;
virtual long GetOption (DECODER_OPTION eOptionId, void* pOption) = 0; virtual long EXTAPI GetOption (DECODER_OPTION eOptionId, void* pOption) = 0;
}; };
extern "C" extern "C"
{ {
#else
typedef struct ISVCEncoderVtbl ISVCEncoderVtbl;
typedef const ISVCEncoderVtbl* ISVCEncoder;
struct ISVCEncoderVtbl {
int (*Initialize) (ISVCEncoder*, SVCEncodingParam* pParam, const INIT_TYPE kiInitType);
int (*Initialize2) (ISVCEncoder*, void* pParam, const INIT_TYPE kiInitType);
int (*Uninitialize) (ISVCEncoder*);
int (*EncodeFrame) (ISVCEncoder*, const unsigned char* kpSrc, SFrameBSInfo* pBsInfo);
int (*EncodeFrame2) (ISVCEncoder*, const SSourcePicture** kppSrcPicList, int nSrcPicNum, SFrameBSInfo* pBsInfo);
int (*EncodeParameterSets) (ISVCEncoder*, SFrameBSInfo* pBsInfo);
int (*PauseFrame) (ISVCEncoder*, const unsigned char* kpSrc, SFrameBSInfo* pBsInfo);
int (*ForceIntraFrame) (ISVCEncoder*, bool bIDR);
int (*SetOption) (ISVCEncoder*, ENCODER_OPTION eOptionId, void* pOption);
int (*GetOption) (ISVCEncoder*, ENCODER_OPTION eOptionId, void* pOption);
};
typedef struct ISVCDecoderVtbl ISVCDecoderVtbl;
typedef const ISVCDecoderVtbl* ISVCDecoder;
struct ISVCDecoderVtbl {
long (*Initialize) (ISVCDecoder*, void* pParam, const INIT_TYPE iInitType);
long (*Uninitialize) (ISVCDecoder*);
DECODING_STATE (*DecodeFrame) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
int* pStride,
int* iWidth,
int* iHeight);
DECODING_STATE (*DecodeFrame2) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
void** ppDst,
SBufferInfo* pDstInfo);
DECODING_STATE (*DecodeFrameEx) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
unsigned char* pDst,
int iDstStride,
int* iDstLen,
int* iWidth,
int* iHeight,
int* iColorFormat);
long (*SetOption) (ISVCDecoder*, DECODER_OPTION eOptionId, void* pOption);
long (*GetOption) (ISVCDecoder*, DECODER_OPTION eOptionId, void* pOption);
};
#endif
int CreateSVCEncoder (ISVCEncoder** ppEncoder); int CreateSVCEncoder (ISVCEncoder** ppEncoder);
void DestroySVCEncoder (ISVCEncoder* pEncoder); void DestroySVCEncoder (ISVCEncoder* pEncoder);
long CreateDecoder (ISVCDecoder** ppDecoder); long CreateDecoder (ISVCDecoder** ppDecoder);
void DestroyDecoder (ISVCDecoder* pDecoder); void DestroyDecoder (ISVCDecoder* pDecoder);
#ifdef __cplusplus
} }
#endif
#endif//WELS_VIDEO_CODEC_SVC_API_H__ #endif//WELS_VIDEO_CODEC_SVC_API_H__

44
codec/decoder/plus/inc/welsDecoderExt.h
View File

@ -59,8 +59,8 @@ class CWelsDecoder : public ISVCDecoder {
CWelsDecoder (void_t); CWelsDecoder (void_t);
virtual ~CWelsDecoder(); virtual ~CWelsDecoder();
virtual long Initialize (void_t* pParam, const INIT_TYPE keInitType); virtual long EXTAPI Initialize (void_t* pParam, const INIT_TYPE keInitType);
virtual long Uninitialize(); virtual long EXTAPI Uninitialize();
/*************************************************************************** /***************************************************************************
* Description: * Description:
@ -74,28 +74,28 @@ virtual long Uninitialize();
* *
* return: if decode frame success return 0, otherwise corresponding error returned. * return: if decode frame success return 0, otherwise corresponding error returned.
***************************************************************************/ ***************************************************************************/
virtual DECODING_STATE DecodeFrame (const unsigned char* kpSrc, virtual DECODING_STATE EXTAPI DecodeFrame (const unsigned char* kpSrc,
const int kiSrcLen, const int kiSrcLen,
unsigned char** ppDst, unsigned char** ppDst,
int* pStride, int* pStride,
int& iWidth, int& iWidth,
int& iHeight); int& iHeight);
virtual DECODING_STATE DecodeFrame2 (const unsigned char* kpSrc, virtual DECODING_STATE EXTAPI DecodeFrame2 (const unsigned char* kpSrc,
const int kiSrcLen, const int kiSrcLen,
void_t** ppDst, void_t** ppDst,
SBufferInfo* pDstInfo); SBufferInfo* pDstInfo);
virtual DECODING_STATE DecodeFrameEx (const unsigned char* kpSrc, virtual DECODING_STATE EXTAPI DecodeFrameEx (const unsigned char* kpSrc,
const int kiSrcLen, const int kiSrcLen,
unsigned char* pDst, unsigned char* pDst,
int iDstStride, int iDstStride,
int& iDstLen, int& iDstLen,
int& iWidth, int& iWidth,
int& iHeight, int& iHeight,
int& color_format); int& color_format);
virtual long SetOption (DECODER_OPTION eOptID, void_t* pOption); virtual long EXTAPI SetOption (DECODER_OPTION eOptID, void_t* pOption);
virtual long GetOption (DECODER_OPTION eOptID, void_t* pOption); virtual long EXTAPI GetOption (DECODER_OPTION eOptID, void_t* pOption);
private: private:
PWelsDecoderContext m_pDecContext; PWelsDecoderContext m_pDecContext;

20
codec/encoder/plus/inc/welsEncoderExt.h
View File

@ -65,31 +65,31 @@ class CWelsH264SVCEncoder : public ISVCEncoder {
/* /*
* return: CM_RETURN: 0 - success; otherwise - failed; * return: CM_RETURN: 0 - success; otherwise - failed;
*/ */
virtual int Initialize (SVCEncodingParam* argv, const INIT_TYPE init_type); virtual int EXTAPI Initialize (SVCEncodingParam* argv, const INIT_TYPE init_type);
virtual int Initialize2 (void* argv, const INIT_TYPE init_type); virtual int EXTAPI Initialize2 (void* argv, const INIT_TYPE init_type);
virtual int Uninitialize(); virtual int EXTAPI Uninitialize();
/* /*
* return: EVideoFrameType [IDR: videoFrameTypeIDR; P: videoFrameTypeP; ERROR: videoFrameTypeInvalid] * return: EVideoFrameType [IDR: videoFrameTypeIDR; P: videoFrameTypeP; ERROR: videoFrameTypeInvalid]
*/ */
virtual int EncodeFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo); virtual int EXTAPI EncodeFrame (const unsigned char* kpSrc, SFrameBSInfo* pBsInfo);
virtual int EncodeFrame2 (const SSourcePicture** kppSrcPicList, int nSrcPicNum, SFrameBSInfo* pBsInfo); virtual int EXTAPI EncodeFrame2 (const SSourcePicture** kppSrcPicList, int nSrcPicNum, SFrameBSInfo* pBsInfo);
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int EncodeParameterSets (SFrameBSInfo* pBsInfo); virtual int EXTAPI EncodeParameterSets (SFrameBSInfo* pBsInfo);
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int PauseFrame (const unsigned char* pSrc, SFrameBSInfo* pBsInfo); virtual int EXTAPI PauseFrame (const unsigned char* pSrc, SFrameBSInfo* pBsInfo);
/* /*
* return: 0 - success; otherwise - failed; * return: 0 - success; otherwise - failed;
*/ */
virtual int ForceIntraFrame (bool bIDR); virtual int EXTAPI ForceIntraFrame (bool bIDR);
/************************************************************************ /************************************************************************
* InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,.. * InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,..
@ -97,8 +97,8 @@ class CWelsH264SVCEncoder : public ISVCEncoder {
/* /*
* return: CM_RETURN: 0 - success; otherwise - failed; * return: CM_RETURN: 0 - success; otherwise - failed;
*/ */
virtual int SetOption (ENCODER_OPTION opt_id, void* option); virtual int EXTAPI SetOption (ENCODER_OPTION opt_id, void* option);
virtual int GetOption (ENCODER_OPTION opt_id, void* option); virtual int EXTAPI GetOption (ENCODER_OPTION opt_id, void* option);
private: private:
sWelsEncCtx* m_pEncContext; sWelsEncCtx* m_pEncContext;