On Wed, Aug 27, 2014 at 12:45 PM, Daniel Mack <[email protected]> wrote:
> On 08/27/2014 09:07 AM, Jassi Brar wrote:
>> On Wed, Aug 27, 2014 at 12:20 PM, Daniel Mack <[email protected]> wrote:
>
>>> Hmm? The first USB_XFERS packets will only contain zeros, and we're only
>>> preparing those here. For every successive packet, the length is
>>> recalculated and the audio material is copied in accordingly before the
>>> requets is requeued. What buffers should overlap here?
>>>
>> For 44100/2/S16, req_len is 176 or 44 frames. But we need to send 45
>> frames in a packet occasionally.
>>
>> req[0]->buf = rbuf + 0 and req[1]->buf = rbuf + 176.
>
> No. req[0]->buf = rbuf + 0 and req[1]->buf = rbuf + max_psize.
>
You patch does
- req->length = prm->max_psize;
+ req->length = req_len;
Or did you send the wrong version of patch?
where req_len is calculated as
req_len = rate / uac2->p_interval;
Clearly for 44.1/2/S16, req_len evaluates to 176.
-jassi
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