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webrtc/sdk/android
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Magnus Jedvert 9514071500 Android: Support externally aligned timestamps 
This support is needed if there is a big delay between the creation of
frames and the time they are delivered to the WebRTC C++ layer in
AndroidVideoTrackSource. This is the case if e.g. some heavy video
processing is applied to the frames that takes a couple of hundred
milliseconds. Currently, timestamps coming from Android video sources
are aligned to rtc::TimeMicros() once they reach the WebRTC C++ layer in
AndroidVideoTrackSource. At this point, we "forget" any latency that
might occur before this point, and audio/video sync consequently
suffers.

Bug: webrtc:9991
Change-Id: I7b1aaca9a60a978b9195dd5e5eed4779a0055607
Reviewed-on: https://webrtc-review.googlesource.com/c/110783
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25654}
2018-11-15 11:41:06 +00:00
..
api/org/webrtc Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
instrumentationtests Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
native_api Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
native_unittests Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
src Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
tests/src/org/webrtc Revert "Run robolectric tests for Android on several Android API versions" 2018-11-12 12:30:06 +00:00
AndroidManifest.xml Moving src/webrtc into src/. 2017-09-15 04:25:06 +00:00
BUILD.gn Android: Support externally aligned timestamps 2018-11-15 11:41:06 +00:00
OWNERS Android: Add henrika@ as owner of audio code 2018-03-21 09:59:18 +00:00
PRESUBMIT.py Moving src/webrtc into src/. 2017-09-15 04:25:06 +00:00
README Updating android/README. 2018-03-01 20:22:48 +00:00

README 

This directory holds a Java implementation of the webrtc::PeerConnection API, as
well as the JNI glue C++ code that lets the Java implementation reuse the C++
implementation of the same API.

To build the Java API and related tests, make sure you have a WebRTC checkout
with Android specific parts. This can be used for linux development as well by
configuring gn appropriately, as it is a superset of the webrtc checkout:
fetch --nohooks webrtc_android
gclient sync

You also must generate GN projects with:
--args='target_os="android" target_cpu="arm"'

More information on getting the code, compiling and running the AppRTCMobile
app can be found at:
https://webrtc.org/native-code/android/

To use the Java API, start by looking at the public interface of
org.webrtc.PeerConnection{,Factory} and the org.webrtc.PeerConnectionTest.

To understand the implementation of the API, see the native code in src/jni/pc/.