[wdmaudiodev] Re: Does MSVAD support only 1 Microphone/Output Stream
- From: Vipin Kumar <vipin@xxxxxxxxxxxxxx>
- To: wdmaudiodev@xxxxxxxxxxxxx
- Date: Fri, 13 Feb 2009 11:23:24 +0530
Hi,
Thanks for your reply.
i don't want kmixer to mix, since it's my responsibility to supply
different data to different process.
However, we can identify streams using
CMiniportWaveCyclicStreamMSVAD::CopyFrom and passing this as a pointer(
this value is the same NewStream & CopyFrom) , and thus we can supply
different data to different stream.
But the only problem is that copyFrom Bytecount is more than the Framesize
. why ?? Is there a bug or glitch in kmixer .
can Someone from MS light up the Situation i am facing.
Thanks for your help in advance.
Regards,
Vipin
On Fri, Feb 13, 2009 at 10:59 AM, swapnil kamble <swap.kamble@xxxxxxxxx>wrote:
> Hi Vipin,
>
> However, if MAX_OUTPUT_STREAMS = 1 , i don't get the
>> CMiniportWaveCyclic::NewStream call because kmixer knows that i support
>> only a single stream, so it will supply cached data ( which is same to both
>> the Sound recorder instances)
>
>
> If you keep it to 1 then KMixer will mix all stream before reaching to
> driver. and Without calling NewStream again send the data to driver as if it
> is coming from one stream only. But remember I am talking this only in case
> DirectSound Renderer devices.
>
>
>> Also, i couldn't understand "Your "Directsound:MSVAD Wave" will support
>> the multiple streams with the help of kmixer. " , if i understand it right,
>> then kmixer will supply cached data instead of making a new stream. Please
>> clarify.
>>
> For your testing purpose open graphedit tool. You will find DirectSound
> device in Audio Renderer Category. Try with that.
>
>>
>> yes, it's crystal clear in 1-to-1 case. Since i am feeding data from a
>> usermode application.
>
> Do you play it in real-time ? Or you store it in a file ?
>
>
>
>
>>
>>
>> On Thu, Feb 12, 2009 at 6:35 PM, swapnil kamble <swap.kamble@xxxxxxxxx>wrote:
>>
>>> Hi,
>>> There is no need to modify MAX_OUTPUT_STREAMS. Keep it to one. Your
>>> "Directsound:MSVAD Wave" will support the multiple streams with the help of
>>> kmixer. So ultimately one stream only but surely will serve your purpose. I
>>> want to know the quality of audio that you are getting. Is it crystal clear
>>> for one to one case ?
>>>
>>>
>>>
>>> On Thu, Feb 12, 2009 at 6:12 PM, Vipin Kumar <vipin@xxxxxxxxxxxxxx>wrote:
>>>
>>>> Hi,
>>>> i am using MSVAD simple as my base for supporting 20 virtual
>>>> microphone streams ( however, only 1 device is there, different streams are
>>>> given different data based on session ID).
>>>>
>>>> However, the moment i change MAX_OUTPUT_STREAMS in SIMPLE.H from
>>>> it's default value 1 to say 2 or 3, everything starts getting garbled,
>>>>
>>>>
>>>> the request CMiniportWaveCyclicStreamMSVAD::CopyFrom which triggers at
>>>> 10 ms means 22050 Hz, 16 bit mono , equals 441 bytes per 10 ms ( when
>>>> MAX_OUTPUT_STREAMS = 1)
>>>>
>>>>
>>>> becomes 660 bytes and sometimes 662 bytes, ( when MAX_OUTPUT_STREAMS
>>>> is greater than 1)
>>>>
>>>>
>>>> my only question is,
>>>> (i) What am i doing wrong.( i have confirmed my results 5 times
>>>> in a row, by interchanging the MAX_OUTPUT_STREAMS to 4 and vice versa ) &
>>>> everytime i got the same results.
>>>> (ii) How to do it ( support multiple capture streams);
>>>>
>>>>
>>>> here's 1 windbg log with MAX_OUTPUT_STREAMS set to 4
>>>>
>>>> MSVAD: New Format: 22050
>>>> CMiniportWaveCyclic::NewStream Stream
>>>> Timer Interval 10 Frame Size 441
>>>> MSVAD: KSSTATE_PAUSE
>>>> MSVAD: KSSTATE_RUN
>>>> 660
>>>> 662
>>>> 660
>>>> 662
>>>> 660
>>>> 662
>>>> 660
>>>> 662
>>>> 660
>>>> 662
>>>> 660
>>>>
>>>> Let me know your ideas/ solution
>>>>
>>>> Thanks.
>>>>
>>>> Regards.
>>>> Vipin
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> ...Swapnil
>>>
>>> || Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
>>> || Hare Rama Hare Rama Rama Rama Hare Hare ||
>>>
>>
>>
>
>
> --
> ...Swapnil
>
> || Hare Krishna Hare Krishna Krishna Krishna Hare Hare ||
> || Hare Rama Hare Rama Rama Rama Hare Hare ||
>
Other related posts:
