On 12/2/2011 2:11 AM, Liam Girdwood wrote:
Fwiw, I'm looking at a similar channel mapping problem here for dyanmic PCM and have the start of some working code. Basically I want to be able to specify which channels from each PCM device are routed through each DAI and DAPM widget.
Would you mind sharing the use case you have in mind? It is not clear to me how your design proposal correlate to the problem I have in hand. It looks to me that you are trying to address shuffling of pcm channels correct me if I am wrong. For example, 5.1 content is composed with certain speaker allocation in mind but the actual speaker allocation is different. So, through the approach you are proposing, software can rearrange the pcm channels according to actual speaker allocation.
My problem has more to do with ability to form PCM device at run-time by grouping available slimbus ports at the CPU side and CODEC side after knowing number of channels required. Furthermore, the CODEC I am working on does not allow all mic inputs going to all audio interface capture ports. Unless application can provide the mic input it is interested before initiation of capture stream, it is hard to utilize very slimbus port on the CODEC. Do you have work in progress code on gitorious.org? Perhaps, I can take a look to understand more about your proposed design and see what I can leverage.
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