[gst-embedded] GStreamer on mobile devices and "out of memory" handling

[Stefan Kost]

hi,

Martin Olsson wrote:
> Hi,
>
> I'm aware of the sane arguments for not adding explicit OOM handling to most apps (i.e. http://0pointer.de/blog/projects/on-oom.html etc).
> However, I'm working with various mobile devices, sometimes with no virtual memory or peculiar OOM killers. Further, my app is the "main application" on the device
> meaning that if it's killed there is no more GUI making a reboot the only way out. So I need to handle OOM gracefully in this app and I have
> good mechanisms for doing that.
>
> I'm looking for a video/audio playback solution for this application and I'd love to use GStreamer, and ideally without maintaining a GStreamer/GLib
> fork so I'd like to avoid making changes to g_malloc etc.
>
> Has anything like this been done before? Is there any GStreamer forks for mobile devices? Is there any other media playback framework that is
> more suited for mobile devices? Can you recommend any particular approach to this problem?
>   
What we do in gstreamer for it is to use g_try_malloc when doing
allocations where the size is based on input data. There might be places
where this is not done. Also objects are allocated using g_slice and
would terminate the app if you run out of memory.

If you get termination on low memory, it would be a good idea to check
the backtrace and file a bug if the code is using g_malloc for data.

Stefan

> So far what I was thinking was maybe I could use setjmp/longjmp to jump out of a modified g_malloc up through the stack to the point where my
> application calls into GStreamer but this of course requires changes to g_malloc (though maybe not so big changes).
>
>
>
> 		Martin
>
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