Update media duration if data is appended after the previous duration

media/filters/chunk_demuxer_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 "base/bind.h"
 #include "media/base/audio_decoder_config.h"
 #include "media/base/decoder_buffer.h"
 #include "media/base/mock_callback.h"
 #include "media/base/mock_demuxer_host.h"
 #include "media/base/test_data_util.h"
@@ skipping 2112 matching lines @@
 TEST_F(ChunkDemuxerTest, TestTimestampOffsetMidParse) {
   ASSERT_TRUE(InitDemuxer(true, true, false));
 
   scoped_ptr<Cluster> cluster = GenerateCluster(0, 2);
   // Append only part of the cluster data.
   ASSERT_TRUE(AppendData(cluster->data(), cluster->size() - 13));
 
   // Setting a timestamp should fail because we're in the middle of a cluster.
   ASSERT_FALSE(demuxer_->SetTimestampOffset(kSourceId, 25));
 }
+
+TEST_F(ChunkDemuxerTest, TestDurationChange) {
+  ASSERT_TRUE(InitDemuxer(true, true, false));
+
+  // Add data leading up to the currently set duration.
+  scoped_ptr<Cluster> first_cluster = GenerateCluster(
+      kDefaultDuration().InMilliseconds() - kAudioBlockDuration,
+      kDefaultDuration().InMilliseconds() - kVideoBlockDuration, 2);
+  ASSERT_TRUE(AppendData(first_cluster->data(), first_cluster->size()));
+
+  // Now add data past the duration and expect a new duration to be signalled.
+  scoped_ptr<Cluster> second_cluster = GenerateCluster(
+      kDefaultDuration().InMilliseconds(), 4);
+  EXPECT_CALL(host_, SetDuration(
+      kDefaultDuration() + base::TimeDelta::FromMilliseconds(
+          kAudioBlockDuration * 2)));

[vrk (LEFT CHROMIUM), 2012/07/28 01:42:06]

These values here and below are a bit weird... probably best if I explain in
person on Monday :)

+  ASSERT_TRUE(AppendData(second_cluster->data(), second_cluster->size()));
+}
+
+TEST_F(ChunkDemuxerTest, TestDurationChangeTimestampOffset) {
+  ASSERT_TRUE(InitDemuxer(true, true, false));
+
+  ASSERT_TRUE(demuxer_->SetTimestampOffset(kSourceId,
+                                           kDefaultDuration().InSecondsF()));
+  scoped_ptr<Cluster> cluster = GenerateCluster(0, 4);
+
+  EXPECT_CALL(host_, SetDuration(
+      kDefaultDuration() + base::TimeDelta::FromMilliseconds(
+          kAudioBlockDuration * 2)));
+  ASSERT_TRUE(AppendData(cluster->data(), cluster->size()));
+}
+
 }  // namespace media