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getNumberofPics

Declaration

extern "C" status_t getNumberofPics(int &);

Description

This function must be implemented in the plugin. This function accepts a single int which should be set to the number of images there are in the camera available for download. The function returns a status_t error code to indicate the success of the operation. Any of the status_t error codes can be used, but it is suggested that you stick to using B_NO_ERROR for success and B_ERROR for failure.

Example Implementation - Kodak DC210 Plugin

status_t getNumberofPics(int &number) { //Number of bytes per packet int len = 256; unsigned char *buffer = new unsigned char[256]; //Ask the camera for it's status information, from which we //can obtain the number of images in the camera ComPort->Write("\x7F\x00\x00\x00\x00\x00\x00\x1A",8); ComPort->Read(buffer,1); while (buffer[0] == 0xf0) ComPort->Read(buffer,1); if (buffer[0] == 0xe2) return(B_ERROR); else if (buffer[0] == 0xd1) { ComPort->Read(buffer,1); //Read in a packet of data from the camera receivepacket(buffer,len, true); number = (buffer[56] << 8) + buffer[57]; ComPort->Read(buffer,1); while (buffer[0] == 0xf0) ComPort->Read(buffer,1); //Check for busy byte if (buffer[0] == 0x00) { snooze(50000); return(B_NO_ERROR); } else return(B_ERROR); } else return(B_ERROR); }