H.264 video codec support using OpenH264/FFmpeg

webrtc/modules/video_coding/codecs/h264/h264.gypi

Index: webrtc/modules/video_coding/codecs/h264/h264.gypi
diff --git a/webrtc/modules/video_coding/codecs/h264/h264.gypi b/webrtc/modules/video_coding/codecs/h264/h264.gypi
index a20865c3aaa55ceb414dfa5ce3c7981f6183a146..917118c96b70f47aa7907b0ffc8bda2be58d4ef7 100644
--- a/webrtc/modules/video_coding/codecs/h264/h264.gypi
+++ b/webrtc/modules/video_coding/codecs/h264/h264.gypi
@@ -15,6 +15,36 @@
       'target_name': 'webrtc_h264',
       'type': 'static_library',
       'conditions': [
+        ['use_openh264==1', {
+          'include_dirs': [
+            # TODO(hbos): proper OpenH264 dependency
+            '<(webrtc_root)/modules/video_coding/codecs/h264/openh264/codec/api/svc',
+            '<(webrtc_root)/modules/video_coding/codecs/h264/openh264/codec/common',
+            '<(webrtc_root)/modules/video_coding/codecs/h264/openh264/codec/encoder/core/inc',
+            '<(webrtc_root)/modules/video_coding/codecs/h264/openh264/codec/encoder/plus/inc',
+            '<(webrtc_root)/modules/video_coding/codecs/h264/openh264/codec/processing/interface',
+          ],
+          'link_settings': {
+            'libraries': [
+              # TODO(hbos): Add OpenH264 to third_party and update dependencies.

[stefan-webrtc, 2015/09/28 11:19:01]

Are we fixing this TODO before committing this CL?

[hbos, 2015/09/30 15:35:18]

Yes. I want to be able to build from source and run the trybots. But this may be
difficult and I wanted to kick off the review process before that to be able to
work in parallel.

[stefan-webrtc, 2015/10/01 08:19:30]

Acknowledged.

+              # OpenH264 library root directory
+              '-L<(webrtc_root)/modules/video_coding/codecs/h264/openh264',
+              # The library files '-lXXX' -> 'libXXX.a' inside OpenH264 directory
+              '-lcommon',
+              '-lconsole_common',
+              '-ldecoder',
+              '-lencoder',
+              '-lopenh264',
+              '-lprocessing',
+            ],
+          },
+          'sources': [
+            'h264_encoder_impl.cc',
+            'h264_encoder_impl.h',
+            'h264_decoder_impl.cc',
+            'h264_decoder_impl.h',
+          ],
+        }],
         ['OS=="ios"', {
           'dependencies': [
             'webrtc_h264_video_toolbox',