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I'm writing an ALSA driver using no pci or isa preallocation memory (i'm using snd_pcm_lib_preallocate_pages_for_all). I've some questions according to the alsa mecanism to transfert datas. I'm using ALSA 0.9.6 when i send a wav file to the /dev/audio0 file: dd if=ring.wav of=/dev/audio0 In my ops function, i've added: snd_....._playback_copy(snd_pcm_substream_t *substream, int channel, snd_pcm_uframes_t pos, void* src, snd_pcm_uframes_t count) 1) Why the src pointer doesn't point to the data source (the ring.wav data) when this function is called by ALSA. 2) why the count parameter is always 200? is it possible to change this offset in order to copy more data? 3) it seams more complicated to manage memory than using pci or isa preallocation. Could i use one of these structure ethen if i don't have ISA or PCI bus/dma on my board? Thanks in advance. Mathieu Rondonneau ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
