mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-14 04:16:35 +00:00
64 lines
2.6 KiB
Markdown
64 lines
2.6 KiB
Markdown
# iOS tutorial 5: A Complete media player
|
||
|
||
## Goal
|
||
|
||
![screenshot0]
|
||
![screenshot1]
|
||
|
||
This tutorial wants to be the “demo application” that showcases what can
|
||
be done with GStreamer on the iOS platform.
|
||
|
||
It is intended to be built and run, rather than analyzed for its
|
||
pedagogical value, since it adds very little GStreamer knowledge over
|
||
what has already been shown in [](tutorials/ios/a-basic-media-player.md).
|
||
|
||
It demonstrates the main functionality that a conventional media player
|
||
has, but it is not a complete application yet, therefore it has not been
|
||
uploaded to the AppStore.
|
||
|
||
## Introduction
|
||
|
||
The previous tutorial already implemented a basic media player. This one
|
||
simply adds a few finishing touches. In particular, it adds the
|
||
capability to choose the media to play, and disables the screensaver
|
||
during media playback.
|
||
|
||
These are not features directly related to GStreamer, and are therefore
|
||
outside the scope of these tutorials. Only a few implementation pointers
|
||
are given here.
|
||
|
||
## Selecting the media to play
|
||
|
||
A new `UIView` has been added, derived from `UITableViewController`
|
||
which shows a list of clips. When one is selected, the
|
||
`VideoViewController` from [](tutorials/ios/a-basic-media-player.md) appears
|
||
and its URI property is set to the URI of the selected clip.
|
||
|
||
The list of clips is populated from three sources: Media from the
|
||
device’s Photo library, Media from the application’s Documents folder
|
||
(accessible through iTunes file sharing) and a list of hardcoded
|
||
Internet addresses, selected to showcase different container and codec
|
||
formats, and a couple of bogus ones, to illustrate error reporting.
|
||
|
||
## Preventing the screen from turning off
|
||
|
||
While watching a movie, there is typically no user activity. After a
|
||
short period of such inactivity, iOS will dim the screen, and then turn
|
||
it off completely. To prevent this, the `idleTimerDisabled` property of
|
||
the `UIApplication` class is used. The application sets it to YES
|
||
(screen locking disabled) when the Play button is pressed, so the screen
|
||
is never turned off, and sets it back to NO when the Pause button is
|
||
pressed.
|
||
|
||
## Conclusion
|
||
|
||
This finishes the series of iOS tutorials. Each one of the preceding
|
||
tutorials has evolved on top of the previous one, showing how to
|
||
implement a particular set of features, and concluding in this Tutorial
|
||
5. The goal of Tutorial 5 is to build a complete media player which can
|
||
already be used to showcase the integration of GStreamer and iOS.
|
||
|
||
It has been a pleasure having you here, and see you soon!
|
||
|
||
[screenshot0]: images/tutorials/ios-a-complete-media-player-screenshot-0.png
|
||
[screenshot1]: images/tutorials/ios-a-complete-media-player-screenshot-1.png
|