Integrate VDA with WebRTC.

content/common/gpu/media/exynos_video_decode_accelerator.h

Index: content/common/gpu/media/exynos_video_decode_accelerator.h
diff --git a/content/common/gpu/media/exynos_video_decode_accelerator.h b/content/common/gpu/media/exynos_video_decode_accelerator.h
index 0eb3299c018e4465313ed35c00a55994dc80e053..2c817a5803156f30ff4c83fa596598768652c6ce 100644
--- a/content/common/gpu/media/exynos_video_decode_accelerator.h
+++ b/content/common/gpu/media/exynos_video_decode_accelerator.h
@@ -85,12 +85,12 @@ class CONTENT_EXPORT ExynosVideoDecodeAccelerator :
  private:
   // These are rather subjectively tuned.
   enum {
-    kMfcInputBufferCount = 8,
+    kMfcInputBufferCount = 12,

[wuchengli, 2013/06/10 12:33:43]

Increasing the buffer counts has much better decode performance. But the root
cause is pegged GPU child thread . Let me know if I should revert this.

[Ami GONE FROM CHROMIUM, 2013/06/11 23:48:05]

These numbers are arbitrary (as l.86 says) so no need to revert this but IWBN to
check w/ sheu@ that he doesn't know of a reason these numbers are bad.

     kMfcInputBufferMaxSize = 512 * 1024,
-    kGscInputBufferCount = 4,
+    kGscInputBufferCount = 8,
     // Number of output buffers to use for each VDA stage above what's required
     // by the decoder (e.g. DPB size, in H264).
-    kDpbOutputBufferExtraCount = 3,
+    kDpbOutputBufferExtraCount = 8,

[Pawel Osciak, 2013/06/12 23:38:22]

This adds almost 42MB to our memory footprint for each 1080p video. While it's
not prohibitively high, we still have to address the performance problems anyway
and hopefully those will not be needed anymore then. We might consider holding
up on this particular change for now...

[sheu, 2013/06/13 01:24:26]

I can give you two buffers for free by removing
kGscOutputBufferExtraForSyncCount below (since we fixed our sync problems).

[wuchengli, 2013/06/13 10:28:07]

That's great. Will you do it? Or should I remove it in a separate CL?

     // We're continuing to have issues with synchronization between Mali 3D and
     // Exynos video decode, so we buffer this many extra GSC output buffers in
     // the GSC free output buffers queue, to add a safety margin.