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41e35c334b
The goal of this tracer is to measure the processing latency between a src and a sink. In push mode, the time was read after the chain function have returned. As the amount of time we wait to get synched is reverse to the amount of latency the source introduced, the result was quite surprising. This patch moves the latency calculation in the pre-push hook. When there is no processing in a a pipeline (e.g. fakesrc ! fakesink), the latency will now be 0 as it's supposed to. For pull mode, the code was already correct. When GstBaseSink operate in pull mode, the processing time is done durring the pull, so pull-post is the right hook. The synchronization will happen after the pull has ended. Note that GstBaseSink rarely operate in pull mode. https://bugzilla.gnome.org/show_bug.cgi?id=788431 |
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