Re: windows media player ocx control doesnt play midi files even though the media player plays it.why?

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So you mean to say that the only way is to write my own dshow filter?
And while testing my sample app i found that my device plays midi
"sometimes" using wmp ocx. I have a qtek 9100, motoq and qtek jasjar.
All have windows mobile 5 and wmp 10 in these devices play midi.

I find that motoq plays "midi" "always" using wmp ocx while qtek jasjar
and qtek 9100 play midi "sometimes". I know its difficult to fathom the
word "sometimes" but as a developer its difficult to debug and find why
this happens. I am clueless.. And writing my own dshow filter is
difficult as it may take more time and introduce more problems... :(

Any other alternatives is welcome. Has someone got this kind of problem
earlier??
Damon Barry [MSFT] wrote:
The DirectShow documentation for CE 5.0 is at:
http://msdn.microsoft.com/library/en-us/wcemultimedia5/html/_wce50oriDirectShow.asp?frame=true

...and more specifically there's documentation about writing DirectShow
filters at:
http://msdn.microsoft.com/library/en-us/wcemultimedia5/html/wce50conWritingDirectShowFilters.asp?frame=true

I don't know what sample filters are available with Windows Mobile, but with
CE 5.0 there are a few, including
public\directx\sdk\samples\dshow\Filters\dump, which you could use as a
starting point. But I'm guessing that a MIDI filter will not be an easy
undertaking. I'm sure there are 3rd-party filters out there although I
don't know names.

Damon
--

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"bhushan" <mailtovb@xxxxxxxxx> wrote in message
news:1158815356.669978.178550@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
So you mean to say that i may have to write my own dshow midi
filter?And even if i write it then how will ocx pick up my filter and
play midi?Can u send me any pointers on how to write a dshow filter and
register it with wmp ocx so that ocx can play midi??Or is there any
third party dshow filter that goes well along with wmp ocx which i can
register with wmp ocx and play midi?

-Bhushan.

Damon Barry [MSFT] wrote:
You may have the goal of using just the OCX for all formats, but I don't
think WMP 10 Mobile had that goal. I'm pretty sure they're using DShow
for
some formats and proprietary pipelines for other formats. Furthermore, I
don't think MIDI is officially supported on Windows Mobile 5--the fact
that
you're successfully playing a particular MIDI file on a particular device
may be a stroke of good luck, nothing more.

If you want to use the OCX for MIDI playback then you'll need to create
or
license a DirectShow MIDI filter.

--Damon
--

This posting is provided "AS IS" with no warranties, and confers no
rights.

"bhushan" <mailtovb@xxxxxxxxx> wrote in message
news:1158727034.774034.160850@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,
But arent WMP and WMP ocx using the same set of filters?be it dshow or
someother one..Suppose i use waveapi then will i be able to play mp3
files?I will try playing midi with waveapi and tell the result..But i
would like to use something generic that will play mp3,midi and wav.
The point is be it mp3,wav or midi i would like to use wmp entirely or
waveapi entirely.

-bhushan.

Damon Barry [MSFT] wrote:
I don't think WMP on Windows Mobile uses the OCX for MIDI playback.
If
they
have a DShow filter for MIDI then you'd think the OCX would pick it up
and
use it, but they may be creating a different pipeline altogether for
MIDI.
This isn't an area I know a lot about though.

Can you play the MIDI file through the WAVEAPI?
--

This posting is provided "AS IS" with no warranties, and confers no
rights.

"bhushan" <mailtovb@xxxxxxxxx> wrote in message
news:1158650007.557802.126620@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Hi,
I am experimenting on an application that plays midi,mp3 files. And
i
am using windows media player ocx control for this purpose. My ocx
control plays mp3 files and wma files but not midi files. So i tried
to
play the midi file using windows media player and it was able to
play
it well. I use media player 10 in windows mobile 5. The code snippet
is..

CComptr<IWMPPlayer> m_spWMPplayer;
..creating a instance of windows media player and after that i say
HRESULT hr = m_spWMPplayer->put_url(filename);

i get s_false when i play midi files but i get s_ok when i play mp3
files or wma files...The device that i use is a qtek9100 ppc which
plays midi in windows media player..

Any pointers in this regard will be appreciated.

Bhushan.




.

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