Added EncodedImage::GetBufferPaddingBytes.

webrtc/common_video/video_frame.cc

Index: webrtc/common_video/video_frame.cc
diff --git a/webrtc/common_video/video_frame.cc b/webrtc/common_video/video_frame.cc
index 8ccd821d090be4423917885a53ff9b715d4dfa27..3bf59a720cde8b9b19ed75ce52d64e5ca61e1367 100644
--- a/webrtc/common_video/video_frame.cc
+++ b/webrtc/common_video/video_frame.cc
@@ -19,6 +19,10 @@
 
 namespace webrtc {
 
+// TODO(hbos): The FFmpeg video decoder will require up to 8 bytes, update this
+// when the FFmpeg decoder is added.
+const size_t EncodedImage::kBufferPaddingBytesH264 = 0;
+
 bool EqualPlane(const uint8_t* data1,
                 const uint8_t* data2,
                 int stride,
@@ -242,4 +246,22 @@ bool VideoFrame::EqualsFrame(const VideoFrame& frame) const {
                     stride(kVPlane), half_width, half_height);
 }
 
+size_t EncodedImage::GetBufferPaddingBytes(VideoCodecType codec_type) {
+  switch (codec_type) {
+    case kVideoCodecVP8:
+    case kVideoCodecVP9:
+      return 0;
+    case kVideoCodecH264:
+      return kBufferPaddingBytesH264;
+    case kVideoCodecI420:
+    case kVideoCodecRED:
+    case kVideoCodecULPFEC:
+    case kVideoCodecGeneric:
+    case kVideoCodecUnknown:
+      return 0;
+  }
+  RTC_NOTREACHED();
+  return 0;
+}
+
 }  // namespace webrtc