andrewlewis b58daf8dc5 Reset start trim only if input was queued
Before this change we would reset the start trim to zero after initial
configuration (at the start of playback) and after seeking to any position. The
fact that no trimming was applied at the start of playback meant that after the
first period transition we'd see a mismatch between the next buffer timestamp
(equal to the duration of the period taking into account edits) and the duration
of audio submitted to the sink.

This change modifies the behavior so that we reset the start trim to zero only
if some audio was queued since configuration. This is incorrect in the case of
starting playback at a non-zero position, but fixes the common case of starting
at zero. As before, a later seek to any position is handled via a flush and
resets the trim as required.

Transitions from one period to the next are unaffected by this change.

One way to implement start trimming correctly would be to provide the input
buffer timestamp to the audio processors and only trim when handling audio from
the start of the stream, but that is a larger change so left for later.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=213828511
2018-09-21 12:39:19 +01:00
2018-09-21 12:39:09 +01:00
2017-10-19 18:10:27 +01:00
2018-08-13 14:02:51 +01:00
2018-09-06 13:47:59 +01:00
2016-08-31 15:25:25 +01:00
2016-08-08 11:53:22 +01:00
2014-06-16 12:56:04 +01:00
2015-10-27 21:03:16 +00:00
2014-06-16 12:56:04 +01:00
2018-02-27 13:57:18 +00:00
2018-08-06 17:26:23 +01:00

ExoPlayer

ExoPlayer is an application level media player for Android. It provides an alternative to Androids MediaPlayer API for playing audio and video both locally and over the Internet. ExoPlayer supports features not currently supported by Androids MediaPlayer API, including DASH and SmoothStreaming adaptive playbacks. Unlike the MediaPlayer API, ExoPlayer is easy to customize and extend, and can be updated through Play Store application updates.

Documentation

Using ExoPlayer

ExoPlayer modules can be obtained from JCenter. It's also possible to clone the repository and depend on the modules locally.

From JCenter

The easiest way to get started using ExoPlayer is to add it as a gradle dependency. You need to make sure you have the JCenter and Google repositories included in the build.gradle file in the root of your project:

repositories {
    jcenter()
    google()
}

Next add a dependency in the build.gradle file of your app module. The following will add a dependency to the full library:

implementation 'com.google.android.exoplayer:exoplayer:2.X.X'

where 2.X.X is your preferred version. Alternatively, you can depend on only the library modules that you actually need. For example the following will add dependencies on the Core, DASH and UI library modules, as might be required for an app that plays DASH content:

implementation 'com.google.android.exoplayer:exoplayer-core:2.X.X'
implementation 'com.google.android.exoplayer:exoplayer-dash:2.X.X'
implementation 'com.google.android.exoplayer:exoplayer-ui:2.X.X'

The available library modules are listed below. Adding a dependency to the full library is equivalent to adding dependencies on all of the library modules individually.

  • exoplayer-core: Core functionality (required).
  • exoplayer-dash: Support for DASH content.
  • exoplayer-hls: Support for HLS content.
  • exoplayer-smoothstreaming: Support for SmoothStreaming content.
  • exoplayer-ui: UI components and resources for use with ExoPlayer.

In addition to library modules, ExoPlayer has multiple extension modules that depend on external libraries to provide additional functionality. Some extensions are available from JCenter, whereas others must be built manually. Browse the extensions directory and their individual READMEs for details.

More information on the library and extension modules that are available from JCenter can be found on Bintray.

Locally

Cloning the repository and depending on the modules locally is required when using some ExoPlayer extension modules. It's also a suitable approach if you want to make local changes to ExoPlayer, or if you want to use a development branch.

First, clone the repository into a local directory and checkout the desired branch:

git clone https://github.com/google/ExoPlayer.git
git checkout release-v2

Next, add the following to your project's settings.gradle file, replacing path/to/exoplayer with the path to your local copy:

gradle.ext.exoplayerRoot = 'path/to/exoplayer'
gradle.ext.exoplayerModulePrefix = 'exoplayer-'
apply from: new File(gradle.ext.exoplayerRoot, 'core_settings.gradle')

You should now see the ExoPlayer modules appear as part of your project. You can depend on them as you would on any other local module, for example:

implementation project(':exoplayer-library-core')
implementation project(':exoplayer-library-dash')
implementation project(':exoplayer-library-ui')

Developing ExoPlayer

Project branches

  • Development work happens on the dev-v2 branch. Pull requests should normally be made to this branch.
  • The release-v2 branch holds the most recent release.

Using Android Studio

To develop ExoPlayer using Android Studio, simply open the ExoPlayer project in the root directory of the repository.

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