Cap the memory usage in FFMpegDemuxer.

media/base/decoder_buffer_queue_unittest.cc

 // Copyright (c) 2012 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/base/buffers.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/decoder_buffer_queue.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace media {
 
 static base::TimeDelta ToTimeDelta(int seconds) {
   if (seconds < 0)
     return kNoTimestamp();
   return base::TimeDelta::FromSeconds(seconds);
 }
 
 // Helper to create buffers with specified timestamp in seconds.
 //
 // Negative numbers will be converted to kNoTimestamp();
-static scoped_refptr<DecoderBuffer> CreateBuffer(int timestamp) {
-  scoped_refptr<DecoderBuffer> buffer = new DecoderBuffer(0);
+static scoped_refptr<DecoderBuffer> CreateBuffer(int timestamp, int size = 0) {
+  scoped_refptr<DecoderBuffer> buffer = new DecoderBuffer(size);
   buffer->set_timestamp(ToTimeDelta(timestamp));
   buffer->set_duration(ToTimeDelta(0));
   return buffer;
 }
 
 TEST(DecoderBufferQueueTest, IsEmpty) {
   DecoderBufferQueue queue;
   EXPECT_TRUE(queue.IsEmpty());
 
   queue.Push(CreateBuffer(0));
@@ skipping 95 matching lines @@
   queue.Pop();
   EXPECT_EQ(0, queue.Duration().InSeconds());
 
   queue.Pop();
   EXPECT_EQ(0, queue.Duration().InSeconds());
 
   queue.Pop();
   EXPECT_EQ(0, queue.Duration().InSeconds());
 }
 
+TEST(DecoderBufferQueueTest, Size) {
+  DecoderBufferQueue queue;
+  EXPECT_EQ(queue.data_size(), 0);
+
+  queue.Push(CreateBuffer(0, 1200));
+  EXPECT_EQ(queue.data_size(), 1200);
+
+  queue.Push(CreateBuffer(1, 1000));
+  EXPECT_EQ(queue.data_size(), 2200);
+
+  queue.Pop();
+  EXPECT_EQ(queue.data_size(), 1000);
+
+  queue.Push(CreateBuffer(2, 999));
+  queue.Push(CreateBuffer(3, 999));
+  EXPECT_EQ(queue.data_size(), 2998);
+
+  queue.Clear();
+  EXPECT_EQ(queue.data_size(), 0);
+
+  queue.Push(CreateBuffer(4, 1400));
+  EXPECT_EQ(queue.data_size(), 1400);
+}
+
 }  // namespace media