Hi, thanks! That really sounds like I can update my game (Morzyn) in the near future to activate sound again.
But I have a question regarding volume behavior: You wrote: "Unless volume or category is explicitly set for the classes, all follow system media volume (changed with the hardware volume keys)." I like to fade the game main menu music (mp3) in and out. So I use an animation on the volume property of my Audio-QML-Object. So I set the volume explicitely from 100% to 0% (fade out) and from 0% to 100% (fade in). When system volume is eg. about 30%, does that mean that my menu music "global" volume fades from 30% to 0% or from 100% to 0%? 30% to 0% would be correct in my opinion...it also does so on Windows and Android. For the SoundEffects (wav) I don't change the volume. So they should be 30% (following system volume). BR Martin > Date: Thu, 3 Jul 2014 13:57:36 +0300 > From: juho.hamalai...@tieto.com > To: devel@lists.sailfishos.org > Subject: [SailfishDevel] Updates to resource policy implementation in > QtMultimedia (update8) > > Updates to resource policy implementation in QtMultimedia > ========================================================= > > In next update (update8) there will be QtMultimedia with updates to the > resource policy implementation. The goal of these resource policy > implementation changes is to allow easier and simpler use of Qt/QML > audio APIs while behind the scene playing nicely with the system > resource manager. > > There are three types of Qt classes for audio handling with resource > policy implementation, > * QMediaPlayer [1] > * QSoundEffect [2] > * QAudioOutput [3] > > There are two QML types for use with resource policy implementation > * Audio [4] > * SoundEffect [5] > > In real life applications only QAudioOutput functionality changes > noticeably (QAudioOutput didn't have any resource policy support > previously), QMediaPlayer has already resource policy support and > QSoundEffect resource policy support is improved. > > QMediaPlayer / Audio > ==================== > > This class is meant for playing longer audio files, for example if > implementing media player or background music for game. > > When QMediaPlayer object is created, it will automatically connect to > the resource manager in the background and is immediately ready to use. > When setting the object to playing state, QMediaPlayer internally tries > to acquire resources for the application, and if resources are aqcuired, > playback starts immediately. Otherwise playback will stall. When > QMediaPlayer is in end of media or set to paused or stopped, after 2 > second timeout the object will release resources it has acquired. > > QSoundEffect / SoundEffect > ========================== > > This class is meant for playing short sound effects, for example > application UI clicks or other notifications, game sounds, etc. All > sound effect type sounds are mixed on top of other sounds, so there can > be media player playing music while sound effects are played. > > When QSoundEffect object is created, it will automatically connect to > the resource manager in the background and is immediately ready to use. > When higher priority application is active (voice call, ringtone), > calling play for the object does nothing. When no higher priority > applications are active, or media player object is active, sound effect > is played. > > QAudioOutput > ============ > > This class is meant for example when audio data is streamed. > > When QAudioOutput object is created, it will automatically connect to > the resource manager in the background and is immediately ready to use. > When setting the object to playing state, QAudioOutput internally > tries to acquire resources for the application, and if resources are > aqcuired, playback starts immediately. Otherwise playback will stall. > When QAudioOutput is set to paused or stopped state, after 2 second > timeout the object will release resources it has acquired. > > Notes for both QMediaPlayer and QAudioOutput > ============================================ > > User needs to follow state changed signals from the object, since the > change can happen even without interaction with the application itself. > (Other application acquires resources, voice call acquires resources) > > Only one media player or audio output object can be in playing state at > given time. Last object acquiring resources gets the resources. > > Short note about volume behavior > ================================ > > Unless volume or category is explicitly set for the classes, all follow > system media volume (changed with the hardware volume keys). > > > [1] http://doc.qt.digia.com/qt-5.1/qtmultimedia/qmediaplayer.html > [2] http://doc.qt.digia.com/qt-5.1/qtmultimedia/qsoundeffect.html > [3] http://doc.qt.digia.com/qt-5.1/qtmultimedia/qaudiooutput.html > [4] http://doc.qt.digia.com/qt-5.1/qtmultimedia/qml-qtmultimedia5-audio.html > [5] > http://doc.qt.digia.com/qt-5.1/qtmultimedia/qml-qtmultimedia5-soundeffect.html > > > Regards, > Juho Hämäläinen / jusa_ > > _______________________________________________ > SailfishOS.org Devel mailing list > To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org _______________________________________________ SailfishOS.org Devel mailing list To unsubscribe, please send a mail to devel-unsubscr...@lists.sailfishos.org
