GStreamer::Message(3) Lightweight objects to signal the application of pipeline events

DESCRIPTION

The various nmessage types are represented as subclasses:
GStreamer::Message::EOS
GStreamer::Message::Error
GStreamer::Message::Warning
GStreamer::Message::Info
GStreamer::Message::Tag
GStreamer::Message::Buffering
GStreamer::Message::StateChanged
GStreamer::Message::StateDirty
GStreamer::Message::StepDone
GStreamer::Message::ClockProvide
GStreamer::Message::ClockLost
GStreamer::Message::NewClock
GStreamer::Message::StructureChange
GStreamer::Message::StreamStatus
GStreamer::Message::Application
GStreamer::Message::Element
GStreamer::Message::SegmentStart
GStreamer::Message::SegmentDone
GStreamer::Message::Duration
GStreamer::Message::Latency [0.10.12]
GStreamer::Message::AsyncStart [0.10.13]
GStreamer::Message::AsyncDone [0.10.13]

To create a new message, you call the constructor of the corresponding class.

To check if a message is of a certain type, use the & operator on the type method: 

  if ($message -> type & "error") {
    # ...
  }
  elsif ($message -> type & "eos") {
    # ...
  }

To get to the content of a message, call the corresponding accessor: 

  if ($message -> type & "state-changed") {
    my $old_state = $message -> old_state;
    my $new_state = $message -> new_state;
    my $pending = $message -> pending;
    # ...
  }
  elsif ($message -> type & "segment-done") {
    my $format = $message -> format;
    my $position = $message -> position;
    # ...
  }

METHODS

object = $message->src

structure = $message->get_structure

64 bit unsigned = $message->timestamp

messagetype = $message->type

ENUMS AND FLAGS

flags GStreamer::MessageType

  • 'unknown' / 'GST_MESSAGE_UNKNOWN'
  • 'eos' / 'GST_MESSAGE_EOS'
  • 'error' / 'GST_MESSAGE_ERROR'
  • 'warning' / 'GST_MESSAGE_WARNING'
  • 'info' / 'GST_MESSAGE_INFO'
  • 'tag' / 'GST_MESSAGE_TAG'
  • 'buffering' / 'GST_MESSAGE_BUFFERING'
  • 'state-changed' / 'GST_MESSAGE_STATE_CHANGED'
  • 'state-dirty' / 'GST_MESSAGE_STATE_DIRTY'
  • 'step-done' / 'GST_MESSAGE_STEP_DONE'
  • 'clock-provide' / 'GST_MESSAGE_CLOCK_PROVIDE'
  • 'clock-lost' / 'GST_MESSAGE_CLOCK_LOST'
  • 'new-clock' / 'GST_MESSAGE_NEW_CLOCK'
  • 'structure-change' / 'GST_MESSAGE_STRUCTURE_CHANGE'
  • 'stream-status' / 'GST_MESSAGE_STREAM_STATUS'
  • 'application' / 'GST_MESSAGE_APPLICATION'
  • 'element' / 'GST_MESSAGE_ELEMENT'
  • 'segment-start' / 'GST_MESSAGE_SEGMENT_START'
  • 'segment-done' / 'GST_MESSAGE_SEGMENT_DONE'
  • 'duration' / 'GST_MESSAGE_DURATION'
  • 'latency' / 'GST_MESSAGE_LATENCY'
  • 'async-start' / 'GST_MESSAGE_ASYNC_START'
  • 'async-done' / 'GST_MESSAGE_ASYNC_DONE'
  • 'request-state' / 'GST_MESSAGE_REQUEST_STATE'
  • 'step-start' / 'GST_MESSAGE_STEP_START'
  • 'qos' / 'GST_MESSAGE_QOS'
  • 'progress' / 'GST_MESSAGE_PROGRESS'
  • 'any' / 'GST_MESSAGE_ANY'

COPYRIGHT

Copyright (C) 2005-2011 by the gtk2-perl team.

This software is licensed under the LGPL. See GStreamer for a full notice.

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