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57 lines
1.7 KiB
Text
57 lines
1.7 KiB
Text
On Thu, Jan 08, 2004 at 04:10:00PM +0100, Julien MOUTTE wrote:
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>
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> Hi David,
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>
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> I'd like to implement bufferpools again in x[v]imagesink asap.. Could
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> you please point me to a template/doc on how to do that ?
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>
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> The best for me would be a simple testcase showing how to use the buffer
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> free methods to replace bufferpools.
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x[v]imagesink should call gst_pad_set_bufferalloc_function() on
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their sink pads with a bufferalloc implementation. This bufferalloc
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function is to allocate buffers that _peers_ will send _to_ that pad.
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A trivial version of a bufferalloc function, i.e., one that just
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allocates normal buffers:
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static GstBuffer *
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gst_ximagesink_sink_bufferalloc (GstPad *pad, guint64 offset, guint
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size)
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{
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GstBuffer *buffer;
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buffer = gst_buffer_new_and_alloc (size);
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GST_DATA_FREE_FUNC (data) = gst_ximagesink_buffer_free;
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GST_BUFFER_POOL_PRIVATE (data) = ximagesink; /* whatever */
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return buffer;
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}
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static void
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gst_ximagesink_buffer_free (GstData *data)
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{
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g_free (GST_BUFFER_DATA (data));
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}
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The hard part is going through each element, and every time it
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allocates a buffer using gst_buffer_new_and_alloc () that is then
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sent to a sink pad, the call should be replaced with
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gst_pad_alloc_buffer (sinkpad, offset, size).
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dave...
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-------------------------------------------------------
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