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Original commit message from CVS: * configure.ac: * examples/Makefile.am: * examples/pwg/Makefile.am: * examples/pwg/extract.pl: Enable building the PWG examples. * docs/pwg/advanced-interfaces.xml: Add URI interface stub. * docs/pwg/advanced-types.xml: * docs/pwg/other-autoplugger.xml: * docs/pwg/appendix-porting.xml: * docs/pwg/pwg.xml: Add porting guide (mostly stubs), remove autoplugging (see ADM). * docs/pwg/building-boiler.xml: * docs/pwg/building-chainfn.xml: * docs/pwg/building-pads.xml: * docs/pwg/building-props.xml: * docs/pwg/building-state.xml: * docs/pwg/building-testapp.xml: Update the building-*.xml parts for 0.9 changes. All examples code blocks compile in examples/pwg/*.
37 lines
1.5 KiB
XML
37 lines
1.5 KiB
XML
<chapter id="chapter-porting">
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<title>Porting 0.8 plug-ins to 0.9</title>
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<para>
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This section of the appendix will discuss shortly what changes to
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plugins will be needed to quickly and conveniently port most
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applications from &GStreamer;-0.8 to &GStreamer;-0.9, with references
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to the relevant sections in this Plugin Writer's Guide where needed.
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With this list, it should be possible to port most plugins to
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&GStreamer;-0.9 in less than a day.
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</para>
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<sect1 id="section-porting-objects">
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<title>List of changes</title>
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<itemizedlist>
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<listitem>
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<para>
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Most functions returning an object or an object property have
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been changed to return its own reference rather than a constant
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reference of the one owned by the object itself. The reason for
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this change is primarily threadsafety. This means, effectively,
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that return values of functions such as
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<function>gst_element_get_pad ()</function>,
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<function>gst_pad_get_name ()</function> and many more like these
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have to be free'ed or unreferenced after use. Check the API
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references of each function to know for sure whether return
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values should be free'ed or not.
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</para>
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</listitem>
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<listitem>
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<para>
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base classes, async capsnego (caps-on-buffer), async for sinks,
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bytestream dead / pull_range, direct scheduling, etc.
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</para>
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</listitem>
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</itemizedlist>
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</sect1>
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</chapter>
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