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When clips are buffering (either at the start of playback, or
during playback, when buffer levels drop due to e.g. CPU, file system
or network load), the backend receives notification from the MMF.
While buffering is ongoing, the backend periodically queries the
filling status and emits a signal.
Task-number: QTBUG-4660
Reviewed-by: Frans Englich
(cherry picked from commit bed33ac62d87073120d56ff75a3d2356c99c64ea)
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Because the MIME type of the stream cannot always be deduced from the
URL, we assume that it is a video stream. This is based on the
assumption that the video controllers will be capable of parsing
the container formats for audio-only, as well as video clips. Note
that this assumption may not hold on all devices.
Note that most implementations of the MMF client APIs do not support
HTTP streaming (a.k.a. progressive download). The backend has therefore
only been tested with RTSP streams - see the JIRA entry for further
details.
Task-number: QTBUG-4660
Reviewed-by: Frans Englich
(cherry picked from commit 3117e3a6a9c1bf95fc30ebee4d8d11b646cb7125)
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- Replaced VolumeObserver and VideoOutputObserver interfaces with
signals.
- Added signals for propagating changes in aspect ratio and scale mode
from VideoOutput to VideoPlayer.
- Removed VideoPlayer::getNativeWindowSystemHandles. Interaction with
window system is moved into VideoOutput, so that VideoPlayer is better
focussed on its main task: interacting with CVideoPlayerUtility.
- WId changes, resize and move events received by the VideoOutput
widget cause it to emit a videoWindowChanged signal. This is received
by the VideoPlayer, which triggers a call to updateVideoRect. The
main task of this function is to calculate the scale factors which are
provided to the MMF via CVideoPlayerUtility::SetScaleFactorL. Note
that:
i) This function must be called both before and after the call
to SetDisplayWindowL. For changes in aspect ratio or scale
mode, setting the scale mode after updating the display window
is sufficient. However, testing showed that, when switching in
or out of full-screen mode, two calls were necessary in order
to preserve the correct aspect ratio.
ii) The screen rectangle passed to the MMF is still the full
window extent; it is not the region in which video will
actually be rendered. The post-processor will fill in the
remainder of the window with a background colour (typically
black). If, on the other hand, we passed in the actual video
display rectangle, we would need to do this background painting
in the widget. This in turn would require a change to QtGui:
at present, we can only disable blitting on a per-widget basis
(by setting QWExtra::disableBlit). If we needed to paint the
borders of the video window, disableBlit would need to contain
the actual DSA region, rather than just a single boolean flag.
Task-number: QTBUG-5585
Reviewed-by: Frans Englich
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Task-number: QTBUG-4662
Reviewed-by: Frans Englich
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Errors reported via:
* the DummyPlayer didn't work due to it not doing the usual state
transitions/emission
* MediaObject::setSource() due to errors being emitted
before connections being set up.
* A general state bug.
Task-number: QTBUG-4752
Reviewed-by: Gareth Stockwell
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mmfphonon
Conflicts:
src/3rdparty/phonon/mmf/abstractplayer.cpp
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Volume changes made before playback starts are now correctly propagated.
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This brings tst_MediaObject to 15/7, from previously not running. Changes
involves:
* Skipping .qrc related tests
* Loading/mimetype detction from file:/ URIs
* State fixes
* As part of previous point, move state and error handling down in
AbstractPlayer.
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MediaObject deals with an AbstractPlayer, so make sure we have the signals
declared in that base class, instead of individually in each sub-class.
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Now loads, prepares and plays a clip, but the video is not visible because it's not yet wired up to a VideoWidget.
Video 'playback' can be tested using the demos/mediaplayer application, but the menus are not displayed properly, so a video clip filename must be hardcoded in main.cpp and passed to the MediaPlayer constructor.
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and AudioOutput
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AbstractMediaPlayer
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