Bug 1062666 - Add a debug-only dump method to MediaSource for debugging issues with appended data. r=cajbir

content/media/mediasource/MediaSource.cpp

@@ -507,6 +507,20 @@ MediaSource::InitializationEvent()
   }
 }
 
+#if defined(DEBUG)
+void
+MediaSource::Dump(const char* aPath)
+{
+  char buf[255];
+  PR_snprintf(buf, sizeof(buf), "%s/mediasource-%p", aPath, this);
+  PR_MkDir(buf, 0700);
+
+  if (mSourceBuffers) {
+    mSourceBuffers->Dump(buf);
+  }
+}
+#endif
+
 nsPIDOMWindow*
 MediaSource::GetParentObject() const
 {

content/media/mediasource/MediaSource.h

@@ -98,6 +98,12 @@ public:
   // initialization.
   void QueueInitializationEvent();
 
+#if defined(DEBUG)
+  // Dump the contents of each SourceBuffer to a series of files under aPath.
+  // aPath must exist.  Debug only, invoke from your favourite debugger.
+  void Dump(const char* aPath);
+#endif
+
 private:
   ~MediaSource();
 

content/media/mediasource/ResourceQueue.h

@@ -134,6 +134,23 @@ public:
     return size;
   }
 
+#if defined(DEBUG)
+  void Dump(const char* aPath) {
+    for (uint32_t i = 0; i < uint32_t(GetSize()); ++i) {
+      ResourceItem* item = ResourceAt(i);
+
+      char buf[255];
+      PR_snprintf(buf, sizeof(buf), "%s/%08u.bin", aPath, i);
+      FILE* fp = fopen(buf, "wb");
+      if (!fp) {
+        return;
+      }
+      fwrite(item->mData.Elements(), item->mData.Length(), 1, fp);
+      fclose(fp);
+    }
+  }
+#endif
+
 private:
   ResourceItem* ResourceAt(uint32_t aIndex) const {
     return static_cast<ResourceItem*>(ObjectAt(aIndex));
@@ -173,6 +190,5 @@ private:
   uint64_t mOffset;
 };
 
-
 } // namespace mozilla
 #endif /* MOZILLA_RESOURCEQUEUE_H_ */

content/media/mediasource/SourceBuffer.cpp

@@ -1,3 +1,4 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -687,6 +688,16 @@ SourceBuffer::Evict(double aStart, double aEnd)
   mTrackBuffer->EvictBefore(evictTime);
 }
 
+#if defined(DEBUG)
+void
+SourceBuffer::Dump(const char* aPath)
+{
+  if (mTrackBuffer) {
+    mTrackBuffer->Dump(aPath);
+  }
+}
+#endif
+
 NS_IMPL_CYCLE_COLLECTION_INHERITED(SourceBuffer, DOMEventTargetHelper,
                                    mMediaSource)
 

content/media/mediasource/SourceBuffer.h

@@ -109,6 +109,10 @@ public:
   double GetBufferedStart();
   double GetBufferedEnd();
 
+#if defined(DEBUG)
+  void Dump(const char* aPath);
+#endif
+
 private:
   ~SourceBuffer();
 

content/media/mediasource/SourceBufferDecoder.cpp

@@ -1,3 +1,4 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this

content/media/mediasource/SourceBufferList.cpp

@@ -167,6 +167,16 @@ SourceBufferList::QueueAsyncSimpleEvent(const char* aName)
   NS_DispatchToMainThread(event);
 }
 
+#if defined(DEBUG)
+void
+SourceBufferList::Dump(const char* aPath)
+{
+  for (uint32_t i = 0; i < mSourceBuffers.Length(); ++i) {
+    mSourceBuffers[i]->Dump(aPath);
+  }
+}
+#endif
+
 SourceBufferList::SourceBufferList(MediaSource* aMediaSource)
   : DOMEventTargetHelper(aMediaSource->GetParentObject())
   , mMediaSource(aMediaSource)

content/media/mediasource/SourceBufferList.h

@@ -79,6 +79,10 @@ public:
   // Returns the highest end time of any of the Sourcebuffers.
   double GetHighestBufferedEndTime();
 
+#if defined(DEBUG)
+  void Dump(const char* aPath);
+#endif
+
 private:
   ~SourceBufferList();
 

content/media/mediasource/SourceBufferResource.h

@@ -120,6 +120,12 @@ public:
   // Remove data from resource before the given offset.
   void EvictBefore(uint64_t aOffset);
 
+#if defined(DEBUG)
+  void Dump(const char* aPath) {
+    mInputBuffer.Dump(aPath);
+  }
+#endif
+
 private:
   ~SourceBufferResource();
   nsresult SeekInternal(int64_t aOffset);

content/media/mediasource/TrackBuffer.cpp

@@ -1,3 +1,4 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -19,6 +20,11 @@
 #include "nsThreadUtils.h"
 #include "prlog.h"
 
+#if defined(DEBUG)
+#include <sys/stat.h>
+#include <sys/types.h>
+#endif
+
 struct JSContext;
 class JSObject;
 
@@ -349,4 +355,22 @@ TrackBuffer::Decoders()
   return mInitializedDecoders;
 }
 
+#if defined(DEBUG)
+void
+TrackBuffer::Dump(const char* aPath)
+{
+  char path[255];
+  PR_snprintf(path, sizeof(path), "%s/trackbuffer-%p", aPath, this);
+  PR_MkDir(path, 0700);
+
+  for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
+    char buf[255];
+    PR_snprintf(buf, sizeof(buf), "%s/reader-%p", path, mDecoders[i]->GetReader());
+    PR_MkDir(buf, 0700);
+
+    mDecoders[i]->GetResource()->Dump(buf);
+  }
+}
+#endif
+
 } // namespace mozilla

content/media/mediasource/TrackBuffer.h

@@ -82,6 +82,10 @@ public:
   // TODO: Refactor to a cleaner interface between TrackBuffer and MediaSourceReader.
   const nsTArray<nsRefPtr<SourceBufferDecoder>>& Decoders();
 
+#if defined(DEBUG)
+  void Dump(const char* aPath);
+#endif
+
 private:
   ~TrackBuffer();