ref: 921443ead81f109a6b588aa903a3ca5166f9f7e7
dir: /codec/api/svc/codec_api.h/
/*!
*@page License
*
* \copy
* Copyright (c) 2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef WELS_VIDEO_CODEC_SVC_API_H__
#define WELS_VIDEO_CODEC_SVC_API_H__
#ifndef __cplusplus
#if defined(_MSC_VER) && (_MSC_VER < 1800)
typedef unsigned char bool;
#else
#include <stdbool.h>
#endif
#endif
#include "codec_app_def.h"
#include "codec_def.h"
#if defined(_WIN32) || defined(__cdecl)
#define EXTAPI __cdecl
#else
#define EXTAPI
#endif
/**
* @file codec_api.h
*/
/**
* @page Overview
* * This page is for openh264 codec API usage.
* * For how to use the encoder,please refer to page UsageExampleForEncoder
* * For how to use the decoder,please refer to page UsageExampleForDecoder
* * For more detail about ISVEncoder,please refer to page ISVCEnoder
* * For more detail about ISVDecoder,please refer to page ISVCDecoder
*/
/**
* @page DecoderUsageExample
*
* @brief
* * An example for using the decoder for Decoding only or Parsing only
*
* Step 1:decoder declaration
* @code
*
* //decoder declaration
* ISVCDecoder *pSvcDecoder;
* //input: encoded bitstream start position; should include start code prefix
* unsigned char *pBuf =...;
* //input: encoded bit stream length; should include the size of start code prefix
* int iSize =...;
* //output: [0~2] for Y,U,V buffer for Decoding only
* unsigned char *pData[3] =...;
* //in-out: for Decoding only: declare and initialize the output buffer info, this should never co-exist with Parsing only
* SBufferInfo sDstBufInfo;
* memset(&sDstBufInfo, 0, sizeof(SBufferInfo));
* //in-out: for Parsing only: declare and initialize the output bitstream buffer info for parse only, this should never co-exist with Decoding only
* SParserBsInfo sDstParseInfo;
* memset(&sDstParseInfo, 0, sizeof(SParserBsInfo));
* sDstParseInfo.pDstBuff = new unsigned char[PARSE_SIZE]; //In Parsing only, allocate enough buffer to save transcoded bitstream for a frame
*
* @endcode
*
* Step 2:decoder creation
* @code
* CreateDecoder(pSvcDecoder);
* @endcode
*
* Step 3:declare required parameter, used to differentiate Decoding only and Parsing only
* @code
* SDecodingParam sDecParam = {0};
* sDecParam.sVideoProperty.eVideoBsType = VIDEO_BITSTREAM_AVC;
* //for Parsing only, the assignment is mandatory
* sDecParam.bParseOnly = true;
* @endcode
*
* Step 4:initialize the parameter and decoder context, allocate memory
* @code
* Initialize(&sDecParam);
* @endcode
*
* Step 5:do actual decoding process in slice level;
* this can be done in a loop until data ends
* @code
* //for Decoding only
* iRet = DecodeFrameNoDelay(pBuf, iSize, pData, &sDstBufInfo);
* //or
* iRet = DecodeFrame2(pBuf, iSize, pData, &sDstBufInfo);
* //for Parsing only
* iRet = DecodeParser(pBuf, iSize, &sDstParseInfo);
* //decode failed
* If (iRet != 0){
* RequestIDR or something like that.
* }
* //for Decoding only, pData can be used for render.
* if (sDstBufInfo.iBufferStatus==1){
* output pData[0], pData[1], pData[2];
* }
* //for Parsing only, sDstParseInfo can be used for, e.g., HW decoding
* if (sDstBufInfo.iNalNum > 0){
* Hardware decoding sDstParseInfo;
* }
* //no-delay decoding can be realized by directly calling DecodeFrameNoDelay(), which is the recommended usage.
* //no-delay decoding can also be realized by directly calling DecodeFrame2() again with NULL input, as in the following. In this case, decoder would immediately reconstruct the input data. This can also be used similarly for Parsing only. Consequent decoding error and output indication should also be considered as above.
* iRet = DecodeFrame2(NULL, 0, pData, &sDstBufInfo);
* judge iRet, sDstBufInfo.iBufferStatus ...
* @endcode
*
* Step 6:uninitialize the decoder and memory free
* @code
* Uninitialize();
* @endcode
*
* Step 7:destroy the decoder
* @code
* DestroyDecoder();
* @endcode
*
*/
/**
* @page EncoderUsageExample1
*
* @brief
* * An example for using encoder with basic parameter
*
* Step1:setup encoder
* @code
* int rv = WelsCreateSVCEncoder (&encoder_);
* ASSERT_EQ (0, rv);
* ASSERT_TRUE (encoder_ != NULL);
* @endcode
*
* Step2:initilize with basic parameter
* @code
* SEncParamBase param;
* memset (¶m, 0, sizeof (SEncParamBase));
* param.iUsageType = usageType;
* param.fMaxFrameRate = frameRate;
* param.iPicWidth = width;
* param.iPicHeight = height;
* param.iTargetBitrate = 5000000;
* encoder_->Initialize (¶m);
* @endcode
*
* Step3:set option, set option during encoding process
* @code
* encoder_->SetOption (ENCODER_OPTION_TRACE_LEVEL, &g_LevelSetting);
* int videoFormat = videoFormatI420;
* encoder_->SetOption (ENCODER_OPTION_DATAFORMAT, &videoFormat);
* @endcode
*
* Step4: encode and store ouput bistream
* @code
* int frameSize = width * height * 3 / 2;
* BufferedData buf;
* buf.SetLength (frameSize);
* ASSERT_TRUE (buf.Length() == (size_t)frameSize);
* SFrameBSInfo info;
* memset (&info, 0, sizeof (SFrameBSInfo));
* SSourcePicture pic;
* memset (&pic, 0, sizeof (SsourcePicture));
* pic.iPicWidth = width;
* pic.iPicHeight = height;
* pic.iColorFormat = videoFormatI420;
* pic.iStride[0] = pic.iPicWidth;
* pic.iStride[1] = pic.iStride[2] = pic.iPicWidth >> 1;
* pic.pData[0] = buf.data();
* pic.pData[1] = pic.pData[0] + width * height;
* pic.pData[2] = pic.pData[1] + (width * height >> 2);
* for(int num = 0;num<total_num;num++) {
* //prepare input data
* rv = encoder_->EncodeFrame (&pic, &info);
* ASSERT_TRUE (rv == cmResultSuccess);
* if (info.eFrameType != videoFrameTypeSkip && cbk != NULL) {
* //output bitstream
* }
* }
* @endcode
*
* Step5:teardown encoder
* @code
* if (encoder_) {
* encoder_->Uninitialize();
* WelsDestroySVCEncoder (encoder_);
* }
* @endcode
*
*/
/**
* @page EncoderUsageExample2
*
* @brief
* * An example for using the encoder with extension parameter.
* * The same operation on Step 1,3,4,5 with Example-1
*
* Step 2:initialize with extension parameter
* @code
* SEncParamExt param;
* encoder->GetDefaultParams (¶m);
* param.iUsageType = usageType;
* param.fMaxFrameRate = frameRate;
* param.iPicWidth = width;
* param.iPicHeight = height;
* param.iTargetBitrate = 5000000;
* param.bEnableDenoise = denoise;
* param.iSpatialLayerNum = layers;
* //SM_DYN_SLICE don't support multi-thread now
* if (sliceMode != SM_SINGLE_SLICE && sliceMode != SM_DYN_SLICE)
* param.iMultipleThreadIdc = 2;
*
* for (int i = 0; i < param.iSpatialLayerNum; i++) {
* param.sSpatialLayers[i].iVideoWidth = width >> (param.iSpatialLayerNum - 1 - i);
* param.sSpatialLayers[i].iVideoHeight = height >> (param.iSpatialLayerNum - 1 - i);
* param.sSpatialLayers[i].fFrameRate = frameRate;
* param.sSpatialLayers[i].iSpatialBitrate = param.iTargetBitrate;
*
* param.sSpatialLayers[i].sSliceCfg.uiSliceMode = sliceMode;
* if (sliceMode == SM_DYN_SLICE) {
* param.sSpatialLayers[i].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = 600;
* param.uiMaxNalSize = 1500;
* }
* }
* param.iTargetBitrate *= param.iSpatialLayerNum;
* encoder_->InitializeExt (¶m);
* int videoFormat = videoFormatI420;
* encoder_->SetOption (ENCODER_OPTION_DATAFORMAT, &videoFormat);
*
* @endcode
*/
#ifdef __cplusplus
/**
* @brief Endocder definition
*/
class ISVCEncoder {
public:
/**
* @brief Initialize the encoder
* @param pParam basic encoder parameter
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual int EXTAPI Initialize (const SEncParamBase* pParam) = 0;
/**
* @brief Initilaize encoder by using extension parameters.
* @param pParam extension parameter for encoder
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual int EXTAPI InitializeExt (const SEncParamExt* pParam) = 0;
/**
* @brief Get the default extension parameters.
* If you want to change some parameters of encoder, firstly you need to get the default encoding parameters,
* after that you can change part of parameters you want to.
* @param pParam extension parameter for encoder
* @return CM_RETURN: 0 - success; otherwise - failed;
* */
virtual int EXTAPI GetDefaultParams (SEncParamExt* pParam) = 0;
/// uninitialize the encoder
virtual int EXTAPI Uninitialize() = 0;
/**
* @brief Encode one frame
* @param kpSrcPic the pointer to the source luminance plane
* chrominance data:
* CbData = kpSrc + m_iMaxPicWidth * m_iMaxPicHeight;
* CrData = CbData + (m_iMaxPicWidth * m_iMaxPicHeight)/4;
* the application calling this interface needs to ensure the data validation between the location
* @param pBsInfo output bit stream
* @return 0 - success; otherwise -failed;
*/
virtual int EXTAPI EncodeFrame (const SSourcePicture* kpSrcPic, SFrameBSInfo* pBsInfo) = 0;
/**
* @brief Encode the parameters from output bit stream
* @param pBsInfo output bit stream
* @return 0 - success; otherwise - failed;
*/
virtual int EXTAPI EncodeParameterSets (SFrameBSInfo* pBsInfo) = 0;
/**
* @brief Force encoder to encoder frame as IDR if bIDR set as true
* @param bIDR true: force encoder to encode frame as IDR frame;false, return 1 and nothing to do
* @return 0 - success; otherwise - failed;
*/
virtual int EXTAPI ForceIntraFrame (bool bIDR) = 0;
/**
* @brief Set option for encoder, detail option type, please refer to enumurate ENCODER_OPTION.
* @param pOption option for encoder such as InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,...
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual int EXTAPI SetOption (ENCODER_OPTION eOptionId, void* pOption) = 0;
/**
* @brief Set option for encoder, detail option type, please refer to enumurate ENCODER_OPTION.
* @param pOption option for encoder such as InDataFormat, IDRInterval, SVC Encode Param, Frame Rate, Bitrate,...
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual int EXTAPI GetOption (ENCODER_OPTION eOptionId, void* pOption) = 0;
virtual ~ISVCEncoder() {}
};
/**
* @brief Decoder definition
*/
class ISVCDecoder {
public:
/**
* @brief Initilaize decoder
* @param pParam parameter for decoder
* @return 0 - success; otherwise - failed;
*/
virtual long EXTAPI Initialize (const SDecodingParam* pParam) = 0;
/// Uninitialize the decoder
virtual long EXTAPI Uninitialize() = 0;
/**
* @brief Decode one frame
* @param pSrc the h264 stream to be decoded
* @param iSrcLen the length of h264 stream
* @param ppDst buffer pointer of decoded data (YUV)
* @param pStride output stride
* @param iWidth output width
* @param iHeight output height
* @return 0 - success; otherwise -failed;
*/
virtual DECODING_STATE EXTAPI DecodeFrame (const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
int* pStride,
int& iWidth,
int& iHeight) = 0;
/**
* @brief For slice level DecodeFrameNoDelay() (4 parameters input),
* whatever the function return value is, the output data
* of I420 format will only be available when pDstInfo->iBufferStatus == 1,.
* This function will parse and reconstruct the input frame immediately if it is complete
* It is recommended as the main decoding function for H.264/AVC format input
* @param pSrc the h264 stream to be decoded
* @param iSrcLen the length of h264 stream
* @param ppDst buffer pointer of decoded data (YUV)
* @param pDstInfo information provided to API(width, height, etc.)
* @return 0 - success; otherwise -failed;
*/
virtual DECODING_STATE EXTAPI DecodeFrameNoDelay (const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
SBufferInfo* pDstInfo) = 0;
/**
* @brief For slice level DecodeFrame2() (4 parameters input),
* whatever the function return value is, the output data
* of I420 format will only be available when pDstInfo->iBufferStatus == 1,.
* (e.g., in multi-slice cases, only when the whole picture
* is completely reconstructed, this variable would be set equal to 1.)
* @param pSrc the h264 stream to be decoded
* @param iSrcLen the length of h264 stream
* @param ppDst buffer pointer of decoded data (YUV)
* @param pDstInfo information provided to API(width, height, etc.)
* @return 0 - success; otherwise -failed;
*/
virtual DECODING_STATE EXTAPI DecodeFrame2 (const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
SBufferInfo* pDstInfo) = 0;
/**
* @brief This function parse input bitstream only, and rewrite possible SVC syntax to AVC syntax
* @param pSrc the h264 stream to be decoded
* @param iSrcLen the length of h264 stream
* @param pDstInfo bit stream info
* @return 0 - success; otherwise -failed;
*/
virtual DECODING_STATE EXTAPI DecodeParser (const unsigned char* pSrc,
const int iSrcLen,
SParserBsInfo* pDstInfo) = 0;
/**
* @brief This API does not work for now!! This is for future use to support non-I420 color format output.
* @param pSrc the h264 stream to be decoded
* @param iSrcLen the length of h264 stream
* @param pDst buffer pointer of decoded data (YUV)
* @param iDstStride output stride
* @param iDstLen bit stream info
* @param iWidth output width
* @param iHeight output height
* @param iColorFormat output color format
* @return to do ...
*/
virtual DECODING_STATE EXTAPI DecodeFrameEx (const unsigned char* pSrc,
const int iSrcLen,
unsigned char* pDst,
int iDstStride,
int& iDstLen,
int& iWidth,
int& iHeight,
int& iColorFormat) = 0;
/**
* @brief Set option for decoder, detail option type, please refer to enumurate DECODER_OPTION.
* @param pOption option for decoder such as OutDataFormat, Eos Flag, EC method, ...
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual long EXTAPI SetOption (DECODER_OPTION eOptionId, void* pOption) = 0;
/**
* @brief Get option for decoder, detail option type, please refer to enumurate DECODER_OPTION.
* @param pOption option for decoder such as OutDataFormat, Eos Flag, EC method, ...
* @return CM_RETURN: 0 - success; otherwise - failed;
*/
virtual long EXTAPI GetOption (DECODER_OPTION eOptionId, void* pOption) = 0;
virtual ~ISVCDecoder() {}
};
extern "C"
{
#else
typedef struct ISVCEncoderVtbl ISVCEncoderVtbl;
typedef const ISVCEncoderVtbl* ISVCEncoder;
struct ISVCEncoderVtbl {
int (*Initialize) (ISVCEncoder*, const SEncParamBase* pParam);
int (*InitializeExt) (ISVCEncoder*, const SEncParamExt* pParam);
int (*GetDefaultParams) (ISVCEncoder*, SEncParamExt* pParam);
int (*Uninitialize) (ISVCEncoder*);
int (*EncodeFrame) (ISVCEncoder*, const SSourcePicture* kpSrcPic, SFrameBSInfo* pBsInfo);
int (*EncodeParameterSets) (ISVCEncoder*, 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*, const SDecodingParam* pParam);
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 (*DecodeFrameNoDelay) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
SBufferInfo* pDstInfo);
DECODING_STATE (*DecodeFrame2) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
unsigned char** ppDst,
SBufferInfo* pDstInfo);
DECODING_STATE (*DecodeParser) (ISVCDecoder*, const unsigned char* pSrc,
const int iSrcLen,
SParserBsInfo* 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
typedef void (*WelsTraceCallback) (void* ctx, int level, const char* string);
/** @brief Create encoder
* @param ppEncoder encoder
* @return 0 - success; otherwise - failed;
*/
int WelsCreateSVCEncoder (ISVCEncoder** ppEncoder);
/** @brief Destroy encoder
* @param pEncoder encoder
* @return void
*/
void WelsDestroySVCEncoder (ISVCEncoder* pEncoder);
/** @brief Get the capability of decoder
* @param pDecCapability decoder capability
* @return 0 - success; otherwise - failed;
*/
int WelsGetDecoderCapability (SDecoderCapability* pDecCapability);
/** @brief Create decoder
* @param ppDecoder decoder
* @return 0 - success; otherwise - failed;
*/
long WelsCreateDecoder (ISVCDecoder** ppDecoder);
/** @brief Destroy decoder
* @param pDecoder decoder
* @return void
*/
void WelsDestroyDecoder (ISVCDecoder* pDecoder);
/** @brief Get codec version
* Note, old versions of Mingw (GCC < 4.7) are buggy and use an
* incorrect/different ABI for calling this function, making it
* incompatible with MSVC builds.
* @return The linked codec version
*/
OpenH264Version WelsGetCodecVersion (void);
/** @brief Get codec version
* @param pVersion struct to fill in with the version
*/
void WelsGetCodecVersionEx (OpenH264Version *pVersion);
#ifdef __cplusplus
}
#endif
#endif//WELS_VIDEO_CODEC_SVC_API_H__