Add UMA reporting for RTCVideoDecoder.

content/renderer/media/rtc_video_decoder.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/rtc_video_decoder.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop_proxy.h"
+#include "base/metrics/histogram.h"
 #include "base/safe_numerics.h"
 #include "base/stl_util.h"
 #include "base/task_runner_util.h"
 #include "content/child/child_thread.h"
 #include "content/renderer/media/native_handle_impl.h"
 #include "media/base/bind_to_loop.h"
 #include "media/filters/gpu_video_accelerator_factories.h"
 #include "third_party/webrtc/common_video/interface/texture_video_frame.h"
 #include "third_party/webrtc/system_wrappers/interface/ref_count.h"
 
@@ skipping 143 matching lines @@
     return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
   }
   // Create some shared memory if the queue is empty.
   if (available_shm_segments_.size() == 0) {
     vda_loop_proxy_->PostTask(FROM_HERE,
                               base::Bind(&RTCVideoDecoder::CreateSHM,
                                          weak_this_,
                                          kMaxInFlightDecodes,
                                          kSharedMemorySegmentBytes));
   }
+  UMA_HISTOGRAM_BOOLEAN("Media.RTCVideoDecoderInitDecode", true);

[Ami GONE FROM CHROMIUM, 2013/09/11 17:27:35]

Do you want also want a false log somewhere to indicate attempt+failure for HW
decode?

[Ami GONE FROM CHROMIUM, 2013/09/11 17:27:35]

You'll also need to edit histograms.xml if you want to see this on the UMA
dashboard.

[wuchengli, 2013/09/13 07:38:23]

Done.

[wuchengli, 2013/09/13 07:38:23]

Done. I didn't use enumeration for InitDecode because success/fail is enough.

I also added Media.RTCVideoDecoderError for errors from VDA.

   return WEBRTC_VIDEO_CODEC_OK;
 }
 
 int32_t RTCVideoDecoder::Decode(
     const webrtc::EncodedImage& inputImage,
     bool missingFrames,
     const webrtc::RTPFragmentationHeader* /*fragmentation*/,
     const webrtc::CodecSpecificInfo* /*codecSpecificInfo*/,
     int64_t /*renderTimeMs*/) {
   DVLOG(3) << "Decode";
@@ skipping 557 matching lines @@
       continue;
     *timestamp = it->timestamp;
     *width = it->width;
     *height = it->height;
     return;
   }
   NOTREACHED() << "Missing bitstream buffer id: " << bitstream_buffer_id;
 }
 
 }  // namespace content