iOS HW H264 support.

talk/build/common.gypi

 #
 # libjingle
 # Copyright 2012 Google Inc.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
 #
 #  1. Redistributions of source code must retain the above copyright notice,
 #     this list of conditions and the following disclaimer.
 #  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 33 matching lines @@
     'build_icu%': 1,
     'build_json%': 1,
     'build_libsrtp%': 1,
     'build_libyuv%': 1,
     'build_usrsctp%': 1,
     # Make it possible to provide custom locations for some libraries.
     'libyuv_dir%': '<(DEPTH)/third_party/libyuv',
 
     # Disable this to skip building source requiring GTK.
     'use_gtk%': 1,
+
+    # Enable this to use HW H.264 encoder/decoder on iOS/Mac peerconnections.

[pbos-webrtc, 2015/06/23 19:15:17]

PeerConnections (or remove peerconnections).

[tkchin_webrtc, 2015/06/24 23:21:14]

Done.

+    # Enabling this may break interop with Android clients that support H264.
+    'use_objc_h264%': 0,
   },
   'target_defaults': {
     'include_dirs': [
       '<(DEPTH)',
       '../..',
       '../../third_party',
       '../../third_party/webrtc',
       '../../webrtc',
     ],
     'defines': [
@@ skipping 68 matching lines @@
           'IOS',
           'WEBRTC_MAC',
           'WEBRTC_IOS',
         ],
       }],
       ['OS=="ios" or (OS=="mac" and target_arch!="ia32")', {
         'defines': [
           'CARBON_DEPRECATED=YES',
         ],
       }],
+      ['OS=="ios" and (use_objc_h264==1)', {
+        'defines': [
+          'WEBRTC_OBJC_H264',
+        ],
+      }],
       ['os_posix==1', {
         'configurations': {
           'Debug_Base': {
             'defines': [
               # Chromium's build/common.gypi defines this for all posix _except_
               # for ios & mac.  We want it there as well, e.g. because ASSERT
               # and friends trigger off of it.
               '_DEBUG',
             ],
           },
         },
         'defines': [
           'HASH_NAMESPACE=__gnu_cxx',
           'WEBRTC_POSIX',
           'DISABLE_DYNAMIC_CAST',
           # The POSIX standard says we have to define this.
           '_REENTRANT',
         ],
       }],
     ],
   }, # target_defaults
 }