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baseparse: provide some more initial frame metadata in parse_frame
... and document accordingly.
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1 changed files with 9 additions and 2 deletions
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@ -93,7 +93,10 @@
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* frame contents and setting the caps, and buffer metadata (e.g.
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* buffer timestamp and duration, or keyframe if applicable).
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* (although the latter can also be done by GstBaseParse if it is
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* appropriately configured, see below).
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* appropriately configured, see below). Frame is provided with
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* timestamp derived from upstream (as much as generally possible),
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* duration obtained form configuration (see below), and offset
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* if meaningful (in pull mode).
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* </para></listitem>
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* <listitem><para>
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* Finally the buffer can be pushed downstream and parsing loop starts
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@ -1469,6 +1472,9 @@ gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
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GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET (buffer),
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GST_BUFFER_SIZE (buffer));
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/* use default handler to provide initial (upstream) metadata */
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gst_base_parse_parse_frame (parse, frame);
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/* store offset as it might get overwritten */
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offset = GST_BUFFER_OFFSET (buffer);
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ret = klass->parse_frame (parse, frame);
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@ -1504,7 +1510,8 @@ gst_base_parse_handle_and_push_frame (GstBaseParse * parse,
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}
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}
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/* re-use default handler to add missing metadata as-much-as-possible */
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/* again use default handler to add missing metadata;
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* we may have new information on frame properties */
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gst_base_parse_parse_frame (parse, frame);
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if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer) &&
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GST_BUFFER_DURATION_IS_VALID (buffer)) {
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