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255 lines
6.3 KiB
HTML
255 lines
6.3 KiB
HTML
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<meta http-equiv=Content-Type content="text/html; charset=windows-1252">
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<meta name=Generator content="Microsoft Word 10 (filtered)">
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<title>Here is some sample code for how to change cameras using the DG_CONTROL
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/ DAT_FILESYSTEM operations</title>
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</head>
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<body lang=EN-US>
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<div class=Section1>
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<p class=MsoPlainText style='margin-right:224.25pt'>Here is some sample code
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for how to change cameras using the DG_CONTROL / DAT_FILESYSTEM operations.</p>
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<p class=MsoPlainText style='margin-right:224.25pt'> </p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText>TW_FILESYSTEM fs;</p>
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<p class=MsoPlainText>TW_STR255 cameraname[3];</p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText>// For loop used to discover available cameras...</p>
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<p class=MsoPlainText>memset(cameraname,0,sizeof(cameraname));</p>
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<p class=MsoPlainText>for (rc = (*pDSM_Entry)</p>
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<p class=MsoPlainText> (&AppId,&SourceId,</p>
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<p class=MsoPlainText> DG_CONTROL,</p>
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<p class=MsoPlainText> DAT_FILESYSTEM,</p>
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<p class=MsoPlainText> MSG_GETFIRSTFILE,(TW_MEMREF)&fs);</p>
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<p class=MsoPlainText> rc == TWRC_SUCCESS;</p>
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<p class=MsoPlainText> rc = (*pDSM_Entry)</p>
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<p class=MsoPlainText> (&AppId,&SourceId,</p>
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<p class=MsoPlainText> DG_CONTROL,</p>
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<p class=MsoPlainText> DAT_FILESYSTEM,</p>
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<p class=MsoPlainText> MSG_GETNEXTFILE,(TW_MEMREF)&fs)) {</p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText> // This is the combined front / rear camera...</p>
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<p class=MsoPlainText> // In each case, just take the first one we find...</p>
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<p class=MsoPlainText> if (fs.FileType == TWFY_CAMERA) {</p>
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<p class=MsoPlainText> if (!cameraname[0][0])
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strcpy(cameraname[0],fs.OutputName);</p>
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<p class=MsoPlainText> // This is the front camera...</p>
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<p class=MsoPlainText> } else if (fs.FileType == TWFY_CAMERA_TOP) {</p>
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<p class=MsoPlainText> if (!cameraname[1][0])
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strcpy(cameraname[1],fs.OutputName);</p>
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<p class=MsoPlainText> // This is the rear camera...</p>
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<p class=MsoPlainText> } else if (fs.FileType == TWFY_CAMERA_BOTTOM) {</p>
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<p class=MsoPlainText> if (!cameraname[2][0])
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strcpy(cameraname[2],fs.OutputName);</p>
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<p class=MsoPlainText> }</p>
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<p class=MsoPlainText>}</p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText>// Change to the front camera...</p>
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<p class=MsoPlainText>strcpy(fs.InputName,cameraname[1]);</p>
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<p class=MsoPlainText>rc = (*pDSM_Entry)</p>
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<p class=MsoPlainText> (&AppId,&SourceId,</p>
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<p class=MsoPlainText> DG_CONTROL,</p>
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<p class=MsoPlainText> DAT_FILESYSTEM,</p>
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<p class=MsoPlainText> MSG_CHANGEDIRECTORY,(TW_MEMREF)&fs);</p>
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<p class=MsoPlainText>// Set some front capabilities, like ICAP_CONTRAST</p>
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<p class=MsoPlainText>...</p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText>// Change to the rear camera...</p>
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<p class=MsoPlainText>strcpy(fs.InputName,cameraname[2]);</p>
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<p class=MsoPlainText>rc = (*pDSM_Entry)</p>
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<p class=MsoPlainText> (&AppId,&SourceId,</p>
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<p class=MsoPlainText> DG_CONTROL,</p>
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<p class=MsoPlainText> DAT_FILESYSTEM,</p>
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<p class=MsoPlainText> MSG_CHANGEDIRECTORY,(TW_MEMREF)&fs);</p>
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<p class=MsoPlainText>// Set some rear capabilities, like ICAP_CONTRAST</p>
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<p class=MsoPlainText>...</p>
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<p class=MsoPlainText> </p>
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<p class=MsoPlainText>// Change back to the combined camera (have to do</p>
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<p class=MsoPlainText>// this before scanning starts, but can also do</p>
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<p class=MsoPlainText>// this to simultaneously change front and rear</p>
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<p class=MsoPlainText>// values). Note that this is the default camera</p>
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<p class=MsoPlainText>// when the Source is first started...</p>
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<p class=MsoPlainText>strcpy(fs.InputName,cameraname[0]);</p>
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<p class=MsoPlainText>rc = (*pDSM_Entry)</p>
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<p class=MsoPlainText> (&AppId,&SourceId,</p>
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<p class=MsoPlainText> DG_CONTROL,</p>
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<p class=MsoPlainText> DAT_FILESYSTEM,</p>
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<p class=MsoPlainText> MSG_CHANGEDIRECTORY,(TW_MEMREF)&fs);</p>
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<p class=MsoPlainText>...</p>
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</div>
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</body>
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