Add 5.6.0 changelog.

Change-Id: I1e7ad9b663db94d2986277c92abf574f6380e44d
Reviewed-by: Christian Stromme <christian.stromme@theqtcompany.com>

dist/changes-5.6.0

@@ -0,0 +1,138 @@
+Qt 5.6 introduces many new features and improvements as well as bugfixes
+over the 5.5.x series. For more details, refer to the online documentation
+included in this distribution. The documentation is also available online:
+
+  http://doc.qt.io/qt-5.6
+
+The Qt version 5.6 series is binary compatible with the 5.5.x series.
+Applications compiled for 5.5 will continue to run with 5.6.
+
+Some of the changes listed in this file include issue tracking numbers
+corresponding to tasks in the Qt Bug Tracker:
+
+  http://bugreports.qt.io/
+
+Each of these identifiers can be entered in the bug tracker to obtain more
+information about a particular change.
+
+****************************************************************************
+*                   Important Behavior Changes                             *
+****************************************************************************
+
+ - QAudioOutput now transitions to IdleState instead of ActiveState when
+   calling resume() in push mode. This was already the documented behavior
+   but in practice, it was not respected on any platform. See QTBUG-50390.
+
+ - DirectShow is now the default backend on all desktop versions of Windows,
+   regardless of the compiler used. The Windows Media Foundation backend
+   (WMF) can be re-enabled by configuring Qt with the -wmf-backend option.
+   See QTBUG-45597.
+
+****************************************************************************
+*                          Library                                         *
+****************************************************************************
+
+QtMultimedia
+------------
+
+ - Added new Playlist QML type.
+
+ - Audio Engine QML types
+   * All types can now be created dynamically and added to the engine
+     using new 'add' functions.
+
+ - MediaPlayer, Audio and Video (QML):
+   * Added new audio role API.
+   * Added playlist support.
+
+ - QMediaPlayer:
+   * Added new audio role API.
+
+ - [QTBUG-49838] Fixed crash when playing very short WAV files with
+   QSoundEffect.
+
+****************************************************************************
+*                      Platform Specific Changes                           *
+****************************************************************************
+
+Android
+-------
+
+ - QAudioOutput: improved detection of the default buffer size and sample
+   rate.
+ - [QTBUG-35416] Camera QVideoFrames can now me mapped when retrieved using
+   QAbstractVideoSurface or QVideoProbe.
+ - [QTBUG-37837] Fixed crash when recording the camera on specific devices.
+ - [QTBUG-46491] Fixed media player blocking the UI when loading a media.
+ - [QTBUG-49134] Fixed crash when starting the camera on specific devices.
+ - [QTBUG-50282] Fixed QAudioRecorder crashing when trying to start it
+   with invalid settings.
+
+iOS / OS X
+----------
+
+ - Greatly improved performance of displaying camera frames using the QML
+   VideoOutput type on iOS.
+ - Camera capture previews from the imageCaptured() signal are now in higher
+   resolutions.
+ - QMediaPlayer::isSeekable() (and QML counterpart) now correctly reports
+   the seekable status.
+ - QAudioRecorder::setVolume() is now functional.
+ - [QTBUG-45570] Fixed media player playback rate not working when set
+   before calling play().
+ - [QTBUG-48057] Media player now correctly seeks as soon as playback starts
+   when the position is changed before calling play().
+ - [QTBUG-48154] Fixed media player volume not working when set before
+   loading a media.
+ - [QTBUG-49170] It is not necessary anymore to set a viewfinder on a
+   QCamera to be able to query the supported viewfinder settings.
+ - [QTBUG-49170] Fixed QCamera ignoring the resolution set in
+   QCameraViewfinderSettings.
+
+Linux
+-----
+
+ - QCameraImageProcessing is now functional.
+ - [QTBUG-49531] Fixed QMediaPlayer not being able to play the same resource
+   file more than once.
+
+QNX
+---
+
+ - QAudioRecorder::setVolume() is now functional.
+ - [QTBUG-49668] Fixed 'loops' property not working for Audio, Video and
+   MediaPlayer QML types.
+
+Windows
+-------
+
+ - [QTBUG-45593] The DirectShow backend now supports HW-accelerated video
+   decoding.
+ - The QML MediaPlayer and Video types previously supported HW-accelerated
+   video decoding only when using the ANGLE OpenGL implementation. It now
+   works with desktop OpenGL as well.
+ - QAudioRecorder::setVolume() is now functional.
+ - QCameraImageProcessing is now functional.
+ - Fixed media player volume not working when set before a media is loaded.
+ - Fixed QVideoFrame::startTime() not returning any value.
+ - Fixed seek requests never being processed when QMediaPlayer::setPosition()
+   is called while the media is not playing.
+
+WinRT
+-----
+
+ - Improved camera support: focus, focus lock and video probe APIs are now
+   functional.
+ - [QTBUG-47465] Fixed camera viewfinder aspect ratio.
+ - [QTBUG-47809] Fixed camera frames being upside down after switching
+   between front and back cameras.
+ - [QTBUG-48331][QTBUG-49660] Fixed camera viewfinder frames not being
+   displayed on the Lumia 930 and 1520.
+ - [QTBUG-48534] Fixed QCamera::searchAndLock() blocking the UI.
+ - [QTBUG-48569] Fixed crash when resuming an application that uses the
+   camera.
+ - [QTBUG-48672] Fixed crash when mapping camera frames after the camera
+   has stopped.
+ - [QTBUG-49236] Fixed playback of local files.
+ - [QTBUG-49347] Fixed crash when the application is suspended while
+   a camera focus lock is in progress.