Forward frame polling in videodecodersoftwarefallbackwrapper.

Forward frame polling in videodecodersoftwarefallbackwrapper.


Deliver video frames on Android, on the decode thread.

VideoCoding
* Adding a method for polling for frames on Android only until the capture implementation takes care of this (longer term plan).

CodecDatabase
* Add an accessor for the current decoder
* Use std::unique_ptr<> for ownership.
* Remove "Release()" and "ReleaseDecoder()". Instead just delete.
* Remove |friend| relationship between CodecDatabase and VCMGenericDecoder.

VCMDecodedFrameCallback
* DCHECKs for thread correctness.
* Remove |lock_| now that a threading model has been established and verified.

VCMGenericDecoder
* All methods now have thread checks.
* Variable access associated with thread checkers.

VideoReceiver
* Added two notification methods, DecoderThreadStarting() and DecoderThreadStopped()
  * Allows us to establish a period when the decoder thread is not running and it is safe to modify variables such as callbacks, that are only read when the decoder thread is running.
  * Allows us to DCHECK thread guarantees.
  * Allows synchronizing callbacks from the module process thread and have them only active while the decoder thread is running.
  * The above, allows us to establish two modes for the thread, single-threaded-mutable and multi-threaded-const.
  * Using that knowledge, we can remove |receive_crit_| as well as locking for a number of member variables.

MediaCodecVideoDecoder
* Removed frame polling code from this class, since this is now done from the root thread function in VideoReceiveStream.

VideoReceiveStream
* On Android: Polls for decoded frames every 10ms (same interval as previously in MediaCodecVideoDecoder)
* [Un]Registers the |video_receiver_| with the module thread only around the time the decoder thread is started/stopped.
* Notifies the receiver of start/stop events of the decoder thread.
* Changed the decoder thread to use the new PlatformThread callback type.

BUG=webrtc:7361, 695438
patch from issue 2764573002 at patchset 20001 (http://crrev.com/2764573002#ps20001)

[sakal, 2017-03-22 12:57:32]

Patchset #1 (id:1) has been deleted

[sakal, 2017-03-22 12:57:39]

Patchset #1 (id:20001) has been deleted

[sakal, 2017-03-22 12:59:28]

Description was changed from

==========
Fix


Deliver video frames on Android, on the decode thread.

VideoCoding
* Adding a method for polling for frames on Android only until the capture
implementation takes care of this (longer term plan).

CodecDatabase
* Add an accessor for the current decoder
* Use std::unique_ptr<> for ownership.
* Remove "Release()" and "ReleaseDecoder()". Instead just delete.
* Remove |friend| relationship between CodecDatabase and VCMGenericDecoder.

VCMDecodedFrameCallback
* DCHECKs for thread correctness.
* Remove |lock_| now that a threading model has been established and verified.

VCMGenericDecoder
* All methods now have thread checks.
* Variable access associated with thread checkers.

VideoReceiver
* Added two notification methods, DecoderThreadStarting() and
DecoderThreadStopped()
  * Allows us to establish a period when the decoder thread is not running and
it is safe to modify variables such as callbacks, that are only read when the
decoder thread is running.
  * Allows us to DCHECK thread guarantees.
  * Allows synchronizing callbacks from the module process thread and have them
only active while the decoder thread is running.
  * The above, allows us to establish two modes for the thread,
single-threaded-mutable and multi-threaded-const.
  * Using that knowledge, we can remove |receive_crit_| as well as locking for a
number of member variables.

MediaCodecVideoDecoder
* Removed frame polling code from this class, since this is now done from the
root thread function in VideoReceiveStream.

VideoReceiveStream
* On Android: Polls for decoded frames every 10ms (same interval as previously
in MediaCodecVideoDecoder)
* [Un]Registers the |video_receiver_| with the module thread only around the
time the decoder thread is started/stopped.
* Notifies the receiver of start/stop events of the decoder thread.
* Changed the decoder thread to use the new PlatformThread callback type.

BUG=webrtc:7361, 695438

patch from issue 2764573002 at patchset 20001
(http://crrev.com/2764573002#ps20001)
==========

to

==========
Forward frame polling in videodecodersoftwarefallbackwrapper.


Deliver video frames on Android, on the decode thread.

VideoCoding
* Adding a method for polling for frames on Android only until the capture
implementation takes care of this (longer term plan).

CodecDatabase
* Add an accessor for the current decoder
* Use std::unique_ptr<> for ownership.
* Remove "Release()" and "ReleaseDecoder()". Instead just delete.
* Remove |friend| relationship between CodecDatabase and VCMGenericDecoder.

VCMDecodedFrameCallback
* DCHECKs for thread correctness.
* Remove |lock_| now that a threading model has been established and verified.

VCMGenericDecoder
* All methods now have thread checks.
* Variable access associated with thread checkers.

VideoReceiver
* Added two notification methods, DecoderThreadStarting() and
DecoderThreadStopped()
  * Allows us to establish a period when the decoder thread is not running and
it is safe to modify variables such as callbacks, that are only read when the
decoder thread is running.
  * Allows us to DCHECK thread guarantees.
  * Allows synchronizing callbacks from the module process thread and have them
only active while the decoder thread is running.
  * The above, allows us to establish two modes for the thread,
single-threaded-mutable and multi-threaded-const.
  * Using that knowledge, we can remove |receive_crit_| as well as locking for a
number of member variables.

MediaCodecVideoDecoder
* Removed frame polling code from this class, since this is now done from the
root thread function in VideoReceiveStream.

VideoReceiveStream
* On Android: Polls for decoded frames every 10ms (same interval as previously
in MediaCodecVideoDecoder)
* [Un]Registers the |video_receiver_| with the module thread only around the
time the decoder thread is started/stopped.
* Notifies the receiver of start/stop events of the decoder thread.
* Changed the decoder thread to use the new PlatformThread callback type.

BUG=webrtc:7361, 695438

patch from issue 2764573002 at patchset 20001
(http://crrev.com/2764573002#ps20001)
==========