Windows Media Player 11 SDK About CD Ripping
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About CD Ripping
The Windows Media Player 11 SDK introduces new functionality for copying audio tracks from CDs to the user's computer. This process is called ripping.
When you rip audio tracks by using the Windows Media Player SDK interfaces, the resulting music tracks are created by using the settings that the user defined in the Windows Media Player Options dialog box.
To enumerate the CD drives on the user's computer, use the IWMPCdromCollection interface. You retrieve a pointer to this interface by calling IWMPCore::get_cdromCollection. By using the count and item methods, you can iterate the collection to retrieve an IWMPCdrom interface pointer for each CD drive on the user's computer. The IWMPCdrom interface represents an individual CD drive. Before you begin ripping a CD, you must first call QueryInterface through an IWMPCdrom pointer to retrieve a pointer to the IWMPCdromRip interface.
To start the ripping operation, simply call IWMPCdromRip::startRip. You can monitor the progress of the ripping operation by periodically calling IWMPCdromRip::get_ripProgress. This method retrieves a progress value for the entire ripping operation. The value retrieved is a number that represents the percentage of ripping completed. You can monitor the state of the ripping operation by periodically calling IWMPCdromRip::get_ripState. This method retrieves a WMPRipState enumeration value that indicates whether the operation is in progress or stopped. You can also monitor the state of the ripping operation by handling the IWMPEvents3::CdromRipStateChange event. You should be careful to compare the IWMPCdromRip pointer (provided by the event) to the pointer that represents your ripping operation to ensure that the event was raised by your operation. You can stop the ripping operation by calling IWMPCdromRip::stopRip.
To receive error notifications about a ripping operation, you can handle the IWMPEvents3::CdromRipMediaError event. Like CdromRipStateChange, this event provides an IWMPCdromRip interface pointer that represents the ripping operation that raised the event. The event also provides an IDispatch pointer that represents the media item that raised the event. You can call QueryInterface through this pointer to retrieve an IWMPMedia pointer.
See Also
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