159 lines
3.4 KiB
C++
159 lines
3.4 KiB
C++
#if !defined(AFX_VIDEOCODEC_H_INCLUDED)
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#define AFX_VIDEOCODEC_H_INCLUDED
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#include <VFW.H>
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#pragma comment(lib,"Vfw32.lib")
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/*
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常用的编码器压缩比,程序使用M263编码
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0x64697663,1684633187,Cinepak Codec by Radius 76032 >> 1860
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0x32335649,842225225,Intel Indeo(R) Video R3.2 76032 >> 475
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0x56555949,1448433993,Intel IYUV codec 76032 >> 38016 放弃这个，压缩比太低
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0x4356534d,1129730893,Microsoft Video 1 76032 >> 3202
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0x3336324d,859189837,Microsoft H.263 Video Codec 76032 >> 663 对分辩率有要求
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0x33564d57,861293911,Microsoft Windows Media Video 9 76032 >> 196
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0x3234504d,842289229,Microsoft MPEG-4 Video Codec V2 76032 >> 349
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M263只支持176*144 352*288 (352*288 24彩的试验只支持biPlanes = 1)
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一段可以用的上的代码
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// 列举本机安装的解码器(CODEC)
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int EnumCodecs(int *fccHandler, char *strName)
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{
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static int i = 0;
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int nRet = 1;
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HIC hIC;
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ICINFO icInfo;
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if (fccHandler == NULL)
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return 0;
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if(!ICInfo(ICTYPE_VIDEO, i, &icInfo))
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{
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i = 0;
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return 0;
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}
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hIC = ICOpen(icInfo.fccType, icInfo.fccHandler, ICMODE_QUERY);
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if (hIC)
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{
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ICGetInfo(hIC, &icInfo, sizeof(icInfo));
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*fccHandler = icInfo.fccHandler;
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//由于得到的szDescription是UNICODE双字节字串，所以要转换为ASCII的
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if (strName != NULL)
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wcstombs(strName, icInfo.szDescription, 256);
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}
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else nRet = -1;
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ICClose(hIC);
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i++;
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return nRet;
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}
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Usage:
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int fccHandler;
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char strName[MAX_PATH];
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while(EnumCodecs(&fccHandler, strName))
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{
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printf("0x%x,%s\n", fccHandler, strName);
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}
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*/
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class CVideoCodec
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{
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COMPVARS m_cv;
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HIC m_hIC;
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BITMAPINFO* m_lpbmiInput;
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BITMAPINFO m_bmiOutput;
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public:
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bool InitCompressor(BITMAPINFO* lpbmi, DWORD fccHandler)
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{
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if (lpbmi == NULL)
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return false;
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m_lpbmiInput = lpbmi;
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ZeroMemory(&m_cv, sizeof(m_cv));
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m_cv.cbSize = sizeof(m_cv);
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m_cv.dwFlags = ICMF_COMPVARS_VALID;
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m_cv.hic = m_hIC;
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m_cv.fccType = ICTYPE_VIDEO;
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m_cv.fccHandler = fccHandler;
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m_cv.lpbiOut = NULL;
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m_cv.lKey = 10;
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m_cv.lDataRate = 6;
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m_cv.lQ = ICQUALITY_HIGH;
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m_hIC = ICOpen(ICTYPE_VIDEO, m_cv.fccHandler, ICMODE_COMPRESS | ICMODE_DECOMPRESS);
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if (m_hIC == NULL)
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{
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return false;
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}
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ICCompressGetFormat(m_hIC, m_lpbmiInput, &m_bmiOutput);
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// 向编码器发送验证
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ICSendMessage(m_hIC, 0x60c9, 0xf7329ace, 0xacdeaea2);
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m_cv.hic = m_hIC;
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m_cv.dwFlags = ICMF_COMPVARS_VALID;
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if (!ICSeqCompressFrameStart(&m_cv, m_lpbmiInput))
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{
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return false;
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}
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ICDecompressBegin(m_hIC, &m_bmiOutput , m_lpbmiInput);
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return true;
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}
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bool DecodeVideoData(BYTE *pin, int len, BYTE* pout, int *lenr,DWORD flag)
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{
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if(!pin || !pout ||!m_hIC)
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return false;
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if (ICDecompress(m_hIC, flag, &m_bmiOutput.bmiHeader, pin, &m_lpbmiInput->bmiHeader, pout) != ICERR_OK)
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return false;
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if (lenr) *lenr = m_lpbmiInput->bmiHeader.biSizeImage;
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return true;
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}
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bool EncodeVideoData(BYTE* pin, int len, BYTE* pout, int* lenr, bool* pKey)
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{
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BYTE *p;
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long s = 1;
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BOOL k = true;
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if ( !pin || !pout || len != (int)m_lpbmiInput->bmiHeader.biSizeImage || !m_hIC)
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return false;
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p = (BYTE*)ICSeqCompressFrame(&m_cv, 0, pin, &k, &s);
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if (!p) return false;
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if (lenr) *lenr = s;
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if (pKey) *pKey = k;
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CopyMemory(pout, p, s);
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return true;
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}
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CVideoCodec()
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{
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m_lpbmiInput = NULL;
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}
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virtual ~CVideoCodec()
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{
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// No init yet or init error
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if (m_hIC == NULL)
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return;
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ICDecompressEnd(m_hIC);
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ICSeqCompressFrameEnd(&m_cv);
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ICCompressorFree(&m_cv);
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ICClose(m_hIC);
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}
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};
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#endif // !defined(AFX_VIDEOCODEC_H_INCLUDED)
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