Backed out changeset 992ad9a82996 (bug 1085175) for bustage on a CLOSED TREE

dom/media/MediaCache.cpp

@@ -1173,7 +1173,6 @@ MediaCache::Update()
       // Figure out where we should be reading from. It's the first
       // uncached byte after the current mStreamOffset.
       int64_t dataOffset = stream->GetCachedDataEndInternal(stream->mStreamOffset);
-      MOZ_ASSERT(dataOffset >= 0);
 
       // Compute where we'd actually seek to to read at readOffset
       int64_t desiredOffset = dataOffset;
@@ -1706,7 +1705,6 @@ MediaCacheStream::NotifyDataStarted(int64_t aOffset)
   ReentrantMonitorAutoEnter mon(gMediaCache->GetReentrantMonitor());
   NS_WARN_IF_FALSE(aOffset == mChannelOffset,
                    "Server is giving us unexpected offset");
-  MOZ_ASSERT(aOffset >= 0);
   mChannelOffset = aOffset;
   if (mStreamLength >= 0) {
     // If we started reading at a certain offset, then for sure
@@ -2136,28 +2134,23 @@ MediaCacheStream::Seek(int32_t aWhence, int64_t aOffset)
     return NS_ERROR_FAILURE;
 
   int64_t oldOffset = mStreamOffset;
-  int64_t newOffset = mStreamOffset;
   switch (aWhence) {
   case PR_SEEK_END:
     if (mStreamLength < 0)
       return NS_ERROR_FAILURE;
-    newOffset = mStreamLength + aOffset;
+    mStreamOffset = mStreamLength + aOffset;
     break;
   case PR_SEEK_CUR:
-    newOffset += aOffset;
+    mStreamOffset += aOffset;
     break;
   case PR_SEEK_SET:
-    newOffset = aOffset;
+    mStreamOffset = aOffset;
     break;
   default:
     NS_ERROR("Unknown whence");
     return NS_ERROR_FAILURE;
   }
 
-  if (newOffset < 0)
-    return NS_ERROR_FAILURE;
-  mStreamOffset = newOffset;
-
   CACHE_LOG(PR_LOG_DEBUG, ("Stream %p Seek to %lld", this, (long long)mStreamOffset));
   gMediaCache->NoteSeek(this, oldOffset);
 
@@ -2199,10 +2192,11 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
         break;
       }
       size = std::min(size, bytesRemaining);
-      // Clamp size until 64-bit file size issues are fixed.
+      // Clamp size until 64-bit file size issues (bug 500784) are fixed.
       size = std::min(size, int64_t(INT32_MAX));
     }
 
+    int32_t bytes;
     int32_t cacheBlock = streamBlock < mBlocks.Length() ? mBlocks[streamBlock] : -1;
     if (cacheBlock < 0) {
       // We don't have a complete cached block here.
@@ -2230,10 +2224,7 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
         // We can just use the data in mPartialBlockBuffer. In fact we should
         // use it rather than waiting for the block to fill and land in
         // the cache.
-        int64_t bytes = std::min<int64_t>(size, streamWithPartialBlock->mChannelOffset - mStreamOffset);
-        // Clamp bytes until 64-bit file size issues are fixed.
-        bytes = std::min(bytes, int64_t(INT32_MAX));
-        NS_ABORT_IF_FALSE(bytes >= 0 && bytes <= aCount, "Bytes out of range.");
+        bytes = std::min<int64_t>(size, streamWithPartialBlock->mChannelOffset - mStreamOffset);
         memcpy(aBuffer,
           reinterpret_cast<char*>(streamWithPartialBlock->mPartialBlockBuffer.get()) + offsetInStreamBlock, bytes);
         if (mCurrentMode == MODE_METADATA) {
@@ -2257,7 +2248,6 @@ MediaCacheStream::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
     gMediaCache->NoteBlockUsage(this, cacheBlock, mCurrentMode, TimeStamp::Now());
 
     int64_t offset = cacheBlock*BLOCK_SIZE + offsetInStreamBlock;
-    int32_t bytes;
     NS_ABORT_IF_FALSE(size >= 0 && size <= INT32_MAX, "Size out of range.");
     nsresult rv = gMediaCache->ReadCacheFile(offset, aBuffer + count, int32_t(size), &bytes);
     if (NS_FAILED(rv)) {
@@ -2294,7 +2284,9 @@ MediaCacheStream::ReadAt(int64_t aOffset, char* aBuffer,
 }
 
 nsresult
-MediaCacheStream::ReadFromCache(char* aBuffer, int64_t aOffset, int64_t aCount)
+MediaCacheStream::ReadFromCache(char* aBuffer,
+                                  int64_t aOffset,
+                                  int64_t aCount)
 {
   ReentrantMonitorAutoEnter mon(gMediaCache->GetReentrantMonitor());
   if (mClosed)
@@ -2316,7 +2308,7 @@ MediaCacheStream::ReadFromCache(char* aBuffer, int64_t aOffset, int64_t aCount)
         return NS_ERROR_FAILURE;
       }
       size = std::min(size, bytesRemaining);
-      // Clamp size until 64-bit file size issues are fixed.
+      // Clamp size until 64-bit file size issues (bug 500784) are fixed.
       size = std::min(size, int64_t(INT32_MAX));
     }
 
@@ -2327,10 +2319,7 @@ MediaCacheStream::ReadFromCache(char* aBuffer, int64_t aOffset, int64_t aCount)
       // We can just use the data in mPartialBlockBuffer. In fact we should
       // use it rather than waiting for the block to fill and land in
       // the cache.
-      // Clamp bytes until 64-bit file size issues are fixed.
-      int64_t toCopy = std::min<int64_t>(size, mChannelOffset - streamOffset);
-      bytes = std::min(toCopy, int64_t(INT32_MAX));
-      NS_ABORT_IF_FALSE(bytes >= 0 && bytes <= toCopy, "Bytes out of range.");
+      bytes = std::min<int64_t>(size, mChannelOffset - streamOffset);
       memcpy(aBuffer + count,
         reinterpret_cast<char*>(mPartialBlockBuffer.get()) + offsetInStreamBlock, bytes);
     } else {

media/libnestegg/include/nestegg-stdint.h

@@ -1,7 +1,6 @@
 #ifdef _WIN32
 typedef __int64 int64_t;
 typedef unsigned __int64 uint64_t;
-#define INT64_MAX 9223372036854775807LL
 #else
 #include <stdint.h>
 #endif

media/libnestegg/src/nestegg.c

@@ -2106,9 +2106,6 @@ nestegg_offset_seek(nestegg * ctx, uint64_t offset)
 {
   int r;
 
-  if (offset > INT64_MAX)
-    return -1;
-
   /* Seek and set up parser state for segment-level element (Cluster). */
   r = ne_io_seek(ctx->io, offset, NESTEGG_SEEK_SET);
   if (r != 0)