Hello Matt, yes you're right, the VirtualAddress parameter does point to the audio data. I was just confused, because when you change the audio data, the device does not play your changes. The changes rest probably in Cash and are not written through to the memory where the DMA accesses to. Markus. > -----Message d'origine----- > De : wdmaudiodev-bounce@xxxxxxxxxxxxx > [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]De la part de Matt Gonzalez > Envoyé : mercredi 28 juin 2006 07:51 > À : wdmaudiodev@xxxxxxxxxxxxx > Objet : [wdmaudiodev] Re: GetMapping VirtualAddress > > > The VirtualAddress parameter does point to the audio data; I've used > that parameter myself to access and preprocess the audio data > directly. > > Matt > > > bollinger@xxxxxxxx wrote: > > Hello! > > > > In my WavePCI driver I tried to debug the audio data coming from > > GetMapping(). > > I accessed the VirtualAddress = kernel-mode virtual-memory > address of > > the mapping. > > > > As I wondered about the contents of the audio data I tried to > > RtlZeroMemory the data > > with no result : the original file is played. > > Is this a cashing problem or where does the VirtualAddress > point to ? > > > > Markus. > > ****************** > > WDMAUDIODEV addresses: > Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx > Subscribe: > mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe > Unsubscribe: > mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe > Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx > > URL to WDMAUDIODEV page: > http://www.wdmaudiodev.com/ > > ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.com/
