C++ vdrefptr::asStream方法代码示例

VDPosition guiPositionHandleCommand(WPARAM wParam, IVDPositionControl *pc) {
	if (!inputVideo)
		return -1;

	IVDStreamSource *pVSS = inputVideo->asStream();
	switch(HIWORD(wParam)) {
		case PCN_START:
			pc->SetPosition(pVSS->getStart());
			return pVSS->getStart();
		case PCN_BACKWARD:
			{
				VDPosition pos = pc->GetPosition();

				if (pos > pVSS->getStart()) {
					pc->SetPosition(pos - 1);
					return pos - 1;
				}
			}
			break;
		case PCN_FORWARD:
			{
				VDPosition pos = pc->GetPosition();

				if (pos < pVSS->getEnd()) {
					pc->SetPosition(pos + 1);
					return pos + 1;
				}
			}
			break;
		case PCN_END:
			pc->SetPosition(pVSS->getEnd());
			return pVSS->getEnd();

		case PCN_KEYPREV:
			{
				VDPosition lSample = inputVideo->prevKey(pc->GetPosition());

				if (lSample < 0) lSample = pVSS->getStart();

				pc->SetPosition(lSample);
				return lSample;
			}
			break;
		case PCN_KEYNEXT:
			{
				VDPosition lSample = inputVideo->nextKey(pc->GetPosition());

				if (lSample < 0) lSample = pVSS->getEnd();

				pc->SetPosition(lSample);
				return lSample;
			}
			break;
	}

	return -1;
}

void guiPositionInitFromStream(IVDPositionControl *pc) {
	if (!inputVideo) return;

	IVDStreamSource *pVSS = inputVideo->asStream();
	const VDFraction videoRate(pVSS->getRate());

	pc->SetRange(pVSS->getStart(), pVSS->getEnd());
	pc->SetFrameRate(videoRate);
}

void AppendAVI(const wchar_t *pszFile) {
	if (inputAVI) {
		IVDStreamSource *pVSS = inputVideo->asStream();
		VDPosition lTail = pVSS->getEnd();

		if (inputAVI->Append(pszFile)) {
			g_project->BeginTimelineUpdate();
			FrameSubset& s = g_project->GetTimeline().GetSubset();

			s.insert(s.end(), FrameSubsetNode(lTail, pVSS->getEnd() - lTail, false, 0));
			g_project->EndTimelineUpdate();
		}
	}
}

void guiPositionBlit(HWND hWndClipping, VDPosition lFrame, int w, int h) {
	if (lFrame<0) return;
	try {
		BITMAPINFOHEADER *dcf;

		if (!inputVideo)
			SendMessage(hWndClipping, CCM_BLITFRAME2, 0, (LPARAM)NULL);
		else {
			dcf = (BITMAPINFOHEADER *)inputVideo->getDecompressedFormat();

			IVDStreamSource *pVSS = inputVideo->asStream();
			if (lFrame < pVSS->getStart() || lFrame >= pVSS->getEnd())
				SendMessage(hWndClipping, CCM_BLITFRAME2, 0, (LPARAM)NULL);
			else {
				Pixel32 *tmpmem;
				const void *pFrame = inputVideo->getFrame(lFrame);

				int dch = abs(dcf->biHeight);

				if (w>0 && h>0 && w!=dcf->biWidth && h != dch && (tmpmem = new Pixel32[((w+1)&~1)*h + ((dcf->biWidth+1)&~1)*dch])) {
					VBitmap vbt(tmpmem, w, h, 32);
					VBitmap vbs(tmpmem+((w+1)&~1)*h, dcf->biWidth, dch, 32);

					VBitmap srcbm((void *)pFrame, dcf);
					vbs.BitBlt(0, 0, &srcbm, 0, 0, -1, -1);
					vbt.StretchBltBilinearFast(0, 0, w, h, &vbs, 0, 0, vbs.w, vbs.h);

					VDPixmap px(VDAsPixmap(vbt));

					SendMessage(hWndClipping, CCM_BLITFRAME2, 0, (LPARAM)&px);

					delete[] tmpmem;
				} else
					SendMessage(hWndClipping, CCM_BLITFRAME2, 0, (LPARAM)&inputVideo->getTargetFormat());
			}
		}

	} catch(const MyError&) {
		_RPT0(0,"Exception!!!\n");
	}
}

void AppendAVIAutoscan(const wchar_t *pszFile) {
	wchar_t buf[MAX_PATH];
	wchar_t *s = buf, *t;
	int count = 0;

	if (!inputAVI)
		return;

	IVDStreamSource *pVSS = inputVideo->asStream();
	VDPosition originalCount = pVSS->getEnd();

	wcscpy(buf, pszFile);

	t = VDFileSplitExt(VDFileSplitPath(s));

	if (t>buf)
		--t;

	try {
		for(;;) {
			if (!VDDoesPathExist(buf))
				break;
			
			if (!inputAVI->Append(buf))
				break;

			++count;

			s = t;

			for(;;) {
				if (s<buf || !isdigit(*s)) {
					memmove(s+2, s+1, sizeof(wchar_t) * wcslen(s));
					s[1] = L'1';
					++t;
				} else {
					if (*s == L'9') {
						*s-- = L'0';
						continue;
					}
					++*s;
				}
				break;
			}
		}
	} catch(const MyError& e) {
		// if the first segment failed, turn the warning into an error
		if (!count)
			throw;

		// log append errors, but otherwise eat them
		VDLog(kVDLogWarning, VDTextAToW(e.gets()));
	}

	guiSetStatus("Appended %d segments (stopped at \"%s\")", 255, count, VDTextWToA(buf).c_str());

	if (count) {
		FrameSubset& s = g_project->GetTimeline().GetSubset();
		g_project->BeginTimelineUpdate();
		s.insert(s.end(), FrameSubsetNode(originalCount, pVSS->getEnd() - originalCount, false, 0));
		g_project->EndTimelineUpdate();
	}
}