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magiK · Joined: 09 Apr 2006 Posts: 22

I guess the demo disc was good for something after all :)
The archive contains the sceMpeg lib stubs, the PMF Player module and a test app. Binaries for fw 1.5 are included as well. All the info was obtained by disassembly and sniffing with PSPLINK, but some things are still missing, like finding the resolution of the movie.
The test app will try to play a file named 'movie.pmf' from the root of the memory stick. It has no GUI but if someone wants to make one, fell free to do so.
A PMF file is actually some sort of MPEG-2 Program Stream containing AVC video and ATRAC3 audio elementary streams, yet all the MPEG-2 multiplexers I've tried seem to produce incompatible streams. Some PMF files have chapter information in their headers and some of the applications I've looked at show traces of a 'psmf' library that is used to interpret that information.

http://www.hypermagik.com/dl/pmfplayer10.rar

dot_blank · Joined: 28 Sep 2005 Posts: 498 Location: Brasil

very very nice :D
although your comments on some of the
prototypes are not exact and some even dont
show what return values are ...some have unknown
arguments but they do not say what to set as for
default ...but the test app works great thanx for
this very much ...im already using to playback
pmfs :)
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moonlight · Joined: 26 Oct 2005 Posts: 567

Good job!!

I was in the process of reversing the usage of the libmpeg, but i was having a lot of problems, it wasn't being as easy as the atrac3 one.

You have saved me a lot of time!!

I hope to see the stubs and headers soon in the pspsdk :)

jonny · Joined: 22 Sep 2005 Posts: 351

wow great!

do you think we'll be able to get rid of the pmf format?

i was looking at

SceInt32 sceMpegAvcDecode(SceMpeg* Mpeg, SceMpegAu* pAu, SceInt32 iFrameWidth, ScePVoid pBuffer, SceInt32* iInit);

the only dependency from the pmf format seems the pAu parameter, maybe it's possible to fill it manually (maybe one of the fields is a pointer to raw frame data (there are too many "maybe" atm ... :))
(i can already mux avc in the pmp container and read raw video frames data ... do you understand where i'm trying to go? :)

many months ago i've made some tests in order to generate pmf files, but seems hard.
i was able to demux the video easly, but the pmf header, the audio and (iirc) additional obscure data muxed in the file make the pmf hard to generate.
(i should have the demuxer still around if someone want to take a look at how data is mixed in the pmf)

moonlight · Joined: 26 Oct 2005 Posts: 567

I've done a very simple gui for the player, based on the atrac3 player sample gui.

http://www.megaupload.com/?d=49PLOGXC

It's a bit lame, since it restarts itself after a file is played to avoid memory problems, but better than nothing ;)

Xcarecrow · Joined: 23 Jan 2006 Posts: 7

Now only a pmf encoder is needed, and the perfect format pmf is ready. Best resolution, no 333mhz clock (to save battery), best quality, perfect.

magiK · Joined: 09 Apr 2006 Posts: 22

moonlight · Joined: 26 Oct 2005 Posts: 567

Perfect. We are closer to play our own AVC files 480x272 using the native psp functions :)

jonny · Joined: 22 Sep 2005 Posts: 351

!!!

starting making experiments :)

TyRaNiD · Joined: 18 Jan 2004 Posts: 918

Magik, I am guessing the trick is in the name, that dmac function is copying data from SC (system controller i.e. the main cpu) to ME and that destination address is perfectly valid for the ME.

magiK · Joined: 09 Apr 2006 Posts: 22

Further investigation showed that the stream must also contain buffering_period and pic_timing SEIs. I think that the Elecard's and MainConcept's AVC encoders are the only ones that output those SEIs into the stream. You can grab the Elecard encoder pack from here and use GraphEdit to create a compatible AVC stream. You should set the encoder to Main profile, Level 3, no b-frames, one reference frame and access unit delimiters enabled.

xxxstarmanxxx · Joined: 05 Jan 2006 Posts: 84

Hi magiK -

I'm getting very interested in where this is going over the last couple of days.

I just spent a couple of hours trying some graphs on a source file - but i'm not getting anywhere at the mo.

Have you successfully managed to reproduce a stream using graphedit?

If so - could you post your graph for me to do some testing with???

All the best

J.

magiK · Joined: 09 Apr 2006 Posts: 22

xxxstarmanxxx: Take a look at this image (the scaler is resizing to 480x272).
A stream using those settings is decoded by the PSP at around 180 frames per second.

hroo772 · Joined: 11 Jul 2005 Posts: 4

dot_blank · Joined: 28 Sep 2005 Posts: 498 Location: Brasil

magik: thanx for those settings :)
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xxxstarmanxxx · Joined: 05 Jan 2006 Posts: 84

jonny · Joined: 22 Sep 2005 Posts: 351

@xxxstarmanxxx:
you should use the sink filter to produce a raw stream, avcdecme.rar posted some messages above will play it.

@magiK:
you've done an amazing work, i'm really really impressed, i start thinking you have a sort of magic cap hidden somewhere :)

xxxstarmanxxx · Joined: 05 Jan 2006 Posts: 84

jonny · Joined: 22 Sep 2005 Posts: 351

@magiK:

i'm getting some troubles :)
i'm doing tests with clips (the length of each clip is around 10 mins)
i'm encoding using the exact graph you posted (i'm only changing the bitrate in the 512-1024 range)
i get crashes, every clip crashes always at the same point (the point changes from clip to clip)
do you have an idea of what could be the cause?

i use this to test:
http://www.megaupload.com/?d=0P7PZTXP
i've only changed the code a bit to handle big files (my code looks quite ugly ^^)

(@xxxstarmanxxx: place the clips in ms0:/test.264 if you want to try some clips)

kaveman · Joined: 15 Jan 2006 Posts: 30

whoa! amazing work guys!

xxxstarmanxxx · Joined: 05 Jan 2006 Posts: 84

Thanks for info Jonny -

I managed to get my head around pspdev/cyywin/psptoolchain and compile it.

I much prefer encoding more!............LOL

Jonny - I seem to be having success with mainconcept h264AVC encoder rather than the elecard encoder (although they look and perform identically in the graph from what I can see).

I'm using mainconcept encoder in graphedit - bitrate control mode = constant quant.

The file buffers from the memory card (pause/resume) - but the luma/chroma performance is extremely good!!!!

Great stuff guys! - I cant wait for more coding with this!

J.

magiK · Joined: 09 Apr 2006 Posts: 22

Here's a modified version of the x264 encoder. It adds some kind of buffering_period and pic_timing SEIs to the stream. They're not 100% valid but it seems to work anyway. I use the following settings for testing:
x264 --crf 25 -A all --level 3 --pictiming --aud --no-psnr --thread-input --progress --output out.264 in.avs

jonny · Joined: 22 Sep 2005 Posts: 351

magiK · Joined: 09 Apr 2006 Posts: 22

xxxstarmanxxx · Joined: 05 Jan 2006 Posts: 84

Hi all -

Here's a test.264 encode from my latest tests

Blade Trinity Trailer 264 - quant - 14.2mb
Download

Quality overall is quite good - however heavy blocking on section that have no detail.

This also pauses while it reads from the memorystick.

File was encoder using the quantisizer setting in mainconcept encoder.

All the best

J

digihoe · Joined: 14 May 2005 Posts: 108

jonny · Joined: 22 Sep 2005 Posts: 351

@magiK:
thanks for the info (i'll probably use h264_parse for the first tests :)
about the random crashes, i've still not found a solution :(
it seems something related to CopyAu2Me.
some stuffs i've noticed:
- if the clip is fully loaded in memory (so up to 21MB), there are no crashes
- CopyAu2Me seems to transfer more than iSize. seems that, if there is not enough "next frames data" after B+iSize, the app crashes (this will also explain why loading the full clip in memory work)

hroo772 · Joined: 11 Jul 2005 Posts: 4

I was wondering if you guys have taken a look at the PMP sourcecode to see the way the PMP player buffers its video from the memory stick? Just to see if this would prevent the video from lagging whenever the buffer runs out.

Raphael · Joined: 17 Jan 2006 Posts: 646 Location: Germany

If you look closer, jonny actually is the one developing PMPMOD (you meant that one, right?), so he knows best about the buffering involved :)

PS: magiK, you're really great, I'd vote this the best finding of the year in homebrew dev :)

jonny · Joined: 22 Sep 2005 Posts: 351

the purpose of the code i've posted is to identify the cause of random crashes (by crash i mean the psp freeze and the app no more respond)
every comment (about the code i've posted) not focusing on the resolution of this problem is really superfluous (having smooth playback is not the purpose and not the problem here)