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Modified libstagefright to use legacy Qualcomm OMX IL libs on ICS for MSM7x27 SoCs

28th October 2012, 01:03 PM   |  #1  
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Hi, low-end devices users! I have good news for you

As you know, Qualcomm has ended support for their SoCs, based on ARMv6 core, and doesn't release OpenMax IL libraries for Android 4.0+. Someone was crying on Qualcomm's forum, someone try to understand, how to extend GB proprietaries to support new Google OMX extensions, but nobody try to modify libstagefright, and disable using new unimplemended functions...

I spent about a few weeks, learning stagefright architecture, and differents between GB and ICS OMX layers...and now I ready to show it to you

I have only ZTE Blade, and can make ROM only for it. You can download it here. In addition to worked hardware-accelerated video playback, and camcorder, it builded with Linaro GCC 4.7.1, and has a little UI speedup(if it not a placebo ). ROM based on KonstaT device tree, thanks him for it.
Oh, my Dropbox temporary blocked to public links. I upload ROM to letitbit too.

Modified framework's sources can be found on my github. Besides it, you need to add one global define to your device's - COMMON_GLOBAL_CFLAGS += -DQCOM_LEGACY_OMX

UPD: Patch already ported by XDA users! Read CM10 port thread.

UPD2: Please, if you want my help with integration problem, attach logcat at the time, when you try to use vide playback/camcorder. I can't help without any information.
This post can be helpful. Thanks to cougarcougar for it.

UPD3: Fixed playing videos in Browser, and non-fullscreen mode.

UPD4: Last important error on ICS is color banding on gradients in some videos. I think its not OMX work, that need something improvements in Surface rendering...

UPD5: You can use updated OMX from attachment, and my last changes in libstagefright to enable HW playback of AVI, DivX, WMA and RealMedia formats!
Big thanks to miroslav_mm for this research!
For RealMedia some kernel improvements needed. Look here for differents.
If you get a problems with new libs, you can try to still use your device oem libs. For get extended extractor working you need only add that:,, and

Important addition!
Devices based on MSM7x27 chips has two different versions of OMX libs.
"Old"(for froyo?) has an unknown padding between color components parts of returning buffer. I have fixed that for most videos, but some strange resolutions are still gets broken colors with green line on top.
"New" version are present in Samsung/LG devices, who has official Gingerbread ROMs. It returns correct buffer in dfferent color format(YV12, instead of NV21), but it laggy on VGA+ videos. Now don't know why. May be it convert resulting buffer to YV12 on CPU... I will try to understand it later.
I think you can use "old" libs from ZTE Blade on any device, because "new" libs work on ZTE Blade too.

PS: If you want to thanks/support my work - you know where you can find button for it.
Attached Files
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Last edited by Ganster41; 23rd November 2012 at 11:40 AM. Reason: Add some extra info about extended extractor
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28th October 2012, 03:15 PM   |  #2  
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Wow,you are doing an amazing work right there. Big hopes for our little MSM7x27 devices
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28th October 2012, 03:30 PM   |  #3  
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awesome work
testing on p350 now
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28th October 2012, 03:52 PM   |  #4  
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Huge awesomeness! not developing anymore or would have started building!
Good job
28th October 2012, 03:57 PM   |  #5  
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I have tested your build on my Blade
and this is the first time in history that our old armv6 device can play 800x480 videos on ICS!

hope the other dev can see this and works together to fix the remaining issues

keep up the good work!
Last edited by b3rvirus; 29th October 2012 at 11:13 PM.
28th October 2012, 04:13 PM   |  #6  
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Thanks a lot.
Video playback was the only thing that was keeping me away from ics
28th October 2012, 04:20 PM   |  #7  
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YOU ARE THE MAN!!!!!:thumbup::thumbup::thumbup::thumbup::thumb up::thumbup::thumbup::thumbup:

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28th October 2012, 05:06 PM   |  #8  
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28th October 2012, 05:27 PM   |  #9  
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Excellent good job.

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28th October 2012, 05:50 PM   |  #10  
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Now this is real development.
It‘s Legend! Wait for it! Dary!

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