Multi reader/writer cache/buffer

media/blink/buffered_resource_loader.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 "media/blink/buffered_resource_loader.h"
 
 #include "base/bits.h"
 #include "base/callback_helpers.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 209 matching lines @@
     int64 position,
     int read_size,
     uint8* buffer,
     const ReadCB& read_cb) {
   DCHECK(start_cb_.is_null());
   DCHECK(read_cb_.is_null());
   DCHECK(!read_cb.is_null());
   DCHECK(buffer);
   DCHECK_GT(read_size, 0);
 
+  DVLOG(2) << "READ " << read_size << " @ " << position;
+
   // Save the parameter of reading.
   read_cb_ = read_cb;
   read_position_ = position;
   read_size_ = read_size;
   read_buffer_ = buffer;
 
   // Reads should immediately fail if the loader also failed.
   if (loader_failed_) {
     DoneRead(kFailed, 0);
     return;
@@ skipping 567 matching lines @@
 
 void BufferedResourceLoader::Log() {
   media_log_->AddEvent(
       media_log_->CreateBufferedExtentsChangedEvent(
           offset_ - buffer_.backward_bytes(),
           offset_,
           offset_ + buffer_.forward_bytes()));
 }
 
 }  // namespace media