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65 lines
2.2 KiB
XML
65 lines
2.2 KiB
XML
<chapter id="chapter-allocation" xreflabel="Memory allocation">
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<title>Memory allocation</title>
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<para>
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Memory allocation and management is a very important topic in
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multimedia. High definition video uses many magabytes to store
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one single frame of video. It is important to reuse the memory
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when possible instead of constantly allocating and freeing
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the memory.
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</para>
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<para>
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Multimedia systems usually use special purpose chips, such as
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DSPs or GPUs to perform the heavy lifting (especially for video).
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These special purpose chips have usually strict requirements
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for the memory that they can operate on and how the memory
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is accessed.
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</para>
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<para>
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This chapter talks about the memory management features that
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&GStreamer; plugins can use. We will first talk about the
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lowlevel <classname>GstMemory</classname> object that manages
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access to a piece of memory. We then continue with
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<classname>GstBuffer</classname> that is used to exchange data
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between plugins (and the application) and that uses
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<classname>GstMemory</classname>. We talk about
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<classname>GstMeta</classname> that can be placed on buffers to
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give extra info about the buffer and its memory.
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For efficiently managing buffers of the same size, we take a
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look at <classname>GstBufferPool</classname>. To conclude this
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chapter we take a look at the GST_QUERY_ALLOCATION query that
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is used to negotiate memory management options between elements.
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</para>
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<sect1 id="section-allocation-memory" xreflabel="GstMemory">
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<title>GstMemory</title>
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<para>
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</para>
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</sect1>
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<sect1 id="section-allocation-buffer" xreflabel="GstBuffer">
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<title>GstBuffer</title>
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<para>
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</para>
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</sect1>
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<sect1 id="section-allocation-meta" xreflabel="GstMeta">
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<title>GstMeta</title>
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<para>
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</para>
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</sect1>
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<sect1 id="section-allocation-bufferpool" xreflabel="GstBufferPool">
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<title>GstBufferPool</title>
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<para>
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</para>
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</sect1>
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<sect1 id="section-allocation-query" xreflabel="GST_QUERY_ALLOCATION">
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<title>GST_QUERY_ALLOCATION</title>
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<para>
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</para>
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</sect1>
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</chapter>
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