[EXPERIMENTAL] Generic stereo codec with index header sending merged frames

webrtc/modules/video_coding/encoded_frame.cc

Index: webrtc/modules/video_coding/encoded_frame.cc
diff --git a/webrtc/modules/video_coding/encoded_frame.cc b/webrtc/modules/video_coding/encoded_frame.cc
index ec7f560755d71c7acb0738341b1e09efe359e828..b73cc674d78d673a9d031e246798a2f50c71a427 100644
--- a/webrtc/modules/video_coding/encoded_frame.cc
+++ b/webrtc/modules/video_coding/encoded_frame.cc
@@ -8,6 +8,7 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
+#include "webrtc/base/logging.h"
 #include "webrtc/modules/video_coding/include/video_coding_defines.h"
 #include "webrtc/modules/video_coding/encoded_frame.h"
 #include "webrtc/modules/video_coding/generic_encoder.h"
@@ -193,7 +194,19 @@ void VCMEncodedFrame::CopyCodecSpecific(const RTPVideoHeader* header) {
         _codecSpecificInfo.codecType = kVideoCodecH264;
         break;
       }
+      case kRtpVideoStereo: {
+        RTPVideoHeader modified_header = *header;
+        modified_header.codec = kRtpVideoVp9;
+        CopyCodecSpecific(&modified_header);
+        _codecSpecificInfo.codecType = kVideoCodecStereo;
+        _codecSpecificInfo.stereoInfo.stereoCodecType = kVideoCodecVP9;
+        _codecSpecificInfo.stereoInfo.num_frames = 1;
+        _codecSpecificInfo.stereoInfo.encoded_images[0] =
+            header->stereoInfo.encoded_images[0];
+        break;
+      }
       default: {
+        RTC_NOTREACHED();
         _codecSpecificInfo.codecType = kVideoCodecUnknown;
         break;
       }