Implement H264 codec in Objective-C classes.

Implement H264 codec in Objective-C classes.

Continues the work in https://codereview.webrtc.org/2966023002 but
moves the code in VideoToolbox/encoder and decoder into the
RTCVideoEncoder/Decoder Obj-C classes directly, removing one layer of
indirection. Before the RTCVideoEncoder was only a thin wrapper around
the C++ code.

The code in VideoToolbox/ is now mostly implemented in Obj-C style.

Also contains some general fixes for injectable video codecs that were
discovered along the way.

BUG=webrtc:7924

[andersc, 2017-07-11 13:55:24]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-11 13:55:30]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-11 13:58:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-11 13:58:02]

Dry run: Try jobs failed on following builders:
  linux_memcheck on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_memcheck/builds/9594)
  linux_tsan2 on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_tsan2/builds/24101)

[andersc, 2017-07-11 15:15:15]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-11 15:15:20]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-11 15:18:10]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-11 15:18:11]

Dry run: Try jobs failed on following builders:
  mac_asan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_asan/builds/26211)

[andersc, 2017-07-14 08:47:01]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 08:47:12]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 08:51:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 08:51:01]

Dry run: Try jobs failed on following builders:
  mac_asan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_asan/builds/26292)

[andersc, 2017-07-14 09:27:23]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 09:27:31]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 09:29:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 09:29:43]

Dry run: Try jobs failed on following builders:
  mac_asan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_asan/builds/26295)
  mac_compile_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_compile_dbg/builds/...)
  mac_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_rel/builds/27409)

[andersc, 2017-07-14 11:41:08]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 11:41:10]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 11:44:21]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 11:44:22]

Dry run: Try jobs failed on following builders:
  ios32_sim_ios9_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/ios32_sim_ios9_dbg/buil...)
  mac_asan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_asan/builds/26299)
  mac_compile_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_compile_dbg/builds/...)

[andersc, 2017-07-14 13:17:21]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 13:17:43]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 13:20:52]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 13:20:53]

Dry run: Try jobs failed on following builders:
  mac_asan on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_asan/builds/26307)
  mac_compile_dbg on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_compile_dbg/builds/...)
  mac_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_rel/builds/27421)

[andersc, 2017-07-14 13:27:26]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 13:27:32]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 13:39:41]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 13:39:42]

Dry run: Try jobs failed on following builders:
  mac_rel on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/mac_rel/builds/27422)

[andersc, 2017-07-14 13:51:43]

The CQ bit was checked by andersc@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-07-14 13:51:50]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-07-14 14:14:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-07-14 14:14:02]

Dry run: Try jobs failed on following builders:
  linux_baremetal on master.tryserver.webrtc (JOB_FAILED,
http://build.chromium.org/p/tryserver.webrtc/builders/linux_baremetal/builds/...)

[andersc, 2017-07-14 14:33:58]

Description was changed from

==========
Implement H264 codec in Objective-C classes.

Continues the work in https://codereview.webrtc.org/2966023002 but
moves the code in VideoToolbox/encoder and decoder into the
RTCVideoEncoder/Decoder Obj-C classes directly, removing one layer of
indirection. Before the RTCVideoEncoder was only a thin wrapper around
the C++ code.

The code in VideoToolbox/ is now mostly implemented in Obj-C style.

Also contains some general fixes for injectable video codecs that were
discovered along the way.

BUG=webrtc:7924
==========

to

==========
Implement H264 codec in Objective-C classes.

Continues the work in https://codereview.webrtc.org/2966023002 but
moves the code in VideoToolbox/encoder and decoder into the
RTCVideoEncoder/Decoder Obj-C classes directly, removing one layer of
indirection. Before the RTCVideoEncoder was only a thin wrapper around
the C++ code.

The code in VideoToolbox/ is now mostly implemented in Obj-C style.

Also contains some general fixes for injectable video codecs that were
discovered along the way.

BUG=webrtc:7924
==========

[andersc, 2017-07-14 14:33:59]

andersc@webrtc.org changed reviewers:
+ magjed@webrtc.org, tkchin@webrtc.org

[andersc, 2017-08-15 07:30:23]

This CL has been superseded by https://codereview.webrtc.org/2987413002/