Update MuxerListeners to support multiple OnMediaStart/End

This is needed to support one file per representation per period where
there will be multiple content files generated.

Issue: #384

Change-Id: Ib7af750edf864d99075b8da4f3640217a5a94302

packager/media/event/hls_notify_muxer_listener.cc

@@ -44,7 +44,7 @@ void HlsNotifyMuxerListener::OnEncryptionInfoReady(
     const std::vector<uint8_t>& key_id,
     const std::vector<uint8_t>& iv,
     const std::vector<ProtectionSystemSpecificInfo>& key_system_infos) {
-  if (!media_started_) {
+  if (!stream_id_) {
     next_key_id_ = key_id;
     next_iv_ = iv;
     next_key_system_infos_ = key_system_infos;
@@ -53,13 +53,13 @@ void HlsNotifyMuxerListener::OnEncryptionInfoReady(
   }
   for (const ProtectionSystemSpecificInfo& info : key_system_infos) {
     const bool result = hls_notifier_->NotifyEncryptionUpdate(
-        stream_id_, key_id, info.system_id, iv, info.psshs);
+        stream_id_.value(), key_id, info.system_id, iv, info.psshs);
     LOG_IF(WARNING, !result) << "Failed to add encryption info.";
   }
 }
 
 void HlsNotifyMuxerListener::OnEncryptionStart() {
-  if (!media_started_) {
+  if (!stream_id_) {
     must_notify_encryption_start_ = true;
     return;
   }
@@ -71,7 +71,7 @@ void HlsNotifyMuxerListener::OnEncryptionStart() {
 
   for (const ProtectionSystemSpecificInfo& info : next_key_system_infos_) {
     const bool result = hls_notifier_->NotifyEncryptionUpdate(
-        stream_id_, next_key_id_, info.system_id, next_iv_, info.psshs);
+        stream_id_.value(), next_key_id_, info.system_id, next_iv_, info.psshs);
     LOG_IF(WARNING, !result) << "Failed to add encryption info";
   }
   next_key_id_.clear();
@@ -84,31 +84,36 @@ void HlsNotifyMuxerListener::OnMediaStart(const MuxerOptions& muxer_options,
                                           const StreamInfo& stream_info,
                                           uint32_t time_scale,
                                           ContainerType container_type) {
-  MediaInfo media_info;
+  std::unique_ptr<MediaInfo> media_info(new MediaInfo);
   if (!internal::GenerateMediaInfo(muxer_options, stream_info, time_scale,
-                                   container_type, &media_info)) {
+                                   container_type, media_info.get())) {
     LOG(ERROR) << "Failed to generate MediaInfo from input.";
     return;
   }
   if (protection_scheme_ != FOURCC_NULL) {
     internal::SetContentProtectionFields(protection_scheme_, next_key_id_,
-                                         next_key_system_infos_, &media_info);
+                                         next_key_system_infos_,
+                                         media_info.get());
   }
 
-  media_info_ = media_info;
+  // The content may be splitted into multiple files, but their MediaInfo
-  if (!media_info_.has_segment_template()) {
+  // should be compatible.
+  if (media_info_ &&
+      !internal::IsMediaInfoCompatible(*media_info, *media_info_)) {
+    LOG(WARNING) << "Incompatible MediaInfo " << media_info->ShortDebugString()
+                 << " vs " << media_info_->ShortDebugString()
+                 << ". The result manifest may not be playable.";
+  }
+  media_info_ = std::move(media_info);
+
+  if (!media_info_->has_segment_template()) {
     return;
   }
 
-  const bool result = hls_notifier_->NotifyNewStream(
+  if (!NotifyNewStream())
-      media_info, playlist_name_, ext_x_media_name_, ext_x_media_group_id_,
-      &stream_id_);
-  if (!result) {
-    LOG(WARNING) << "Failed to notify new stream.";
     return;
-  }
+  DCHECK(stream_id_);
 
-  media_started_ = true;
   if (must_notify_encryption_start_) {
     OnEncryptionStart();
   }
@@ -118,36 +123,35 @@ void HlsNotifyMuxerListener::OnSampleDurationReady(uint32_t sample_duration) {}
 
 void HlsNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
                                         float duration_seconds) {
+  DCHECK(media_info_);
   // TODO(kqyang): Should we just Flush here to avoid calling Flush explicitly?
   // Don't flush the notifier here. Flushing here would write all the playlists
   // before all Media Playlists are read. Which could cause problems
   // setting the correct EXT-X-TARGETDURATION.
-  if (media_info_.has_segment_template()) {
+  if (media_info_->has_segment_template()) {
     return;
   }
   if (media_ranges.init_range) {
-    shaka::Range* init_range = media_info_.mutable_init_range();
+    shaka::Range* init_range = media_info_->mutable_init_range();
     init_range->set_begin(media_ranges.init_range.value().start);
     init_range->set_end(media_ranges.init_range.value().end);
   }
   if (media_ranges.index_range) {
-    shaka::Range* index_range = media_info_.mutable_index_range();
+    shaka::Range* index_range = media_info_->mutable_index_range();
     index_range->set_begin(media_ranges.index_range.value().start);
     index_range->set_end(media_ranges.index_range.value().end);
   }
 
-  // TODO(rkuroiwa): Make this a method. This is the same as OnMediaStart().
+  if (!stream_id_) {
-  const bool result = hls_notifier_->NotifyNewStream(
+    if (!NotifyNewStream())
-      media_info_, playlist_name_, ext_x_media_name_, ext_x_media_group_id_,
+      return;
-      &stream_id_);
+    DCHECK(stream_id_);
-  if (!result) {
+  } else {
-    LOG(WARNING) << "Failed to notify new stream for VOD.";
+    // HLS is not interested in MediaInfo update.
-    return;
   }
 
   // TODO(rkuroiwa); Keep track of which (sub)segments are encrypted so that the
   // notification is sent right before the enecrypted (sub)segments.
-  media_started_ = true;
   if (must_notify_encryption_start_) {
     OnEncryptionStart();
   }
@@ -163,7 +167,7 @@ void HlsNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
           if (subsegment_index < num_subsegments) {
             const Range& range = subsegment_ranges[subsegment_index];
             hls_notifier_->NotifyNewSegment(
-                stream_id_, media_info_.media_file_name(),
+                stream_id_.value(), media_info_->media_file_name(),
                 event_info.segment_info.start_time,
                 event_info.segment_info.duration, range.start,
                 range.end + 1 - range.start);
@@ -175,14 +179,14 @@ void HlsNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
             const uint64_t segment_start_offset =
                 subsegment_ranges[subsegment_index].start;
             hls_notifier_->NotifyKeyFrame(
-                stream_id_, event_info.key_frame.timestamp,
+                stream_id_.value(), event_info.key_frame.timestamp,
                 segment_start_offset +
                     event_info.key_frame.start_offset_in_segment,
                 event_info.key_frame.size);
           }
           break;
         case EventInfoType::kCue:
-          hls_notifier_->NotifyCueEvent(stream_id_,
+          hls_notifier_->NotifyCueEvent(stream_id_.value(),
                                         event_info.cue_event_info.timestamp);
           break;
       }
@@ -194,13 +198,14 @@ void HlsNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
                    << event_info_.size() << ").";
     }
   }
+  event_info_.clear();
 }
 
 void HlsNotifyMuxerListener::OnNewSegment(const std::string& file_name,
                                           uint64_t start_time,
                                           uint64_t duration,
                                           uint64_t segment_file_size) {
-  if (!media_info_.has_segment_template()) {
+  if (!media_info_->has_segment_template()) {
     EventInfo event_info;
     event_info.type = EventInfoType::kSegment;
     event_info.segment_info = {start_time, duration, segment_file_size};
@@ -209,8 +214,8 @@ void HlsNotifyMuxerListener::OnNewSegment(const std::string& file_name,
     // For multisegment, it always starts from the beginning of the file.
     const size_t kStartingByteOffset = 0u;
     const bool result = hls_notifier_->NotifyNewSegment(
-        stream_id_, file_name, start_time, duration, kStartingByteOffset,
+        stream_id_.value(), file_name, start_time, duration,
-        segment_file_size);
+        kStartingByteOffset, segment_file_size);
     LOG_IF(WARNING, !result) << "Failed to add new segment.";
   }
 }
@@ -220,14 +225,14 @@ void HlsNotifyMuxerListener::OnKeyFrame(uint64_t timestamp,
                                         uint64_t size) {
   if (!iframes_only_)
     return;
-  if (!media_info_.has_segment_template()) {
+  if (!media_info_->has_segment_template()) {
     EventInfo event_info;
     event_info.type = EventInfoType::kKeyFrame;
     event_info.key_frame = {timestamp, start_byte_offset, size};
     event_info_.push_back(event_info);
   } else {
-    const bool result = hls_notifier_->NotifyKeyFrame(stream_id_, timestamp,
+    const bool result = hls_notifier_->NotifyKeyFrame(
-                                                      start_byte_offset, size);
+        stream_id_.value(), timestamp, start_byte_offset, size);
     LOG_IF(WARNING, !result) << "Failed to add new segment.";
   }
 }
@@ -235,15 +240,30 @@ void HlsNotifyMuxerListener::OnKeyFrame(uint64_t timestamp,
 void HlsNotifyMuxerListener::OnCueEvent(uint64_t timestamp,
                                         const std::string& cue_data) {
   // Not using |cue_data| at this moment.
-  if (!media_info_.has_segment_template()) {
+  if (!media_info_->has_segment_template()) {
     EventInfo event_info;
     event_info.type = EventInfoType::kCue;
     event_info.cue_event_info = {timestamp};
     event_info_.push_back(event_info);
   } else {
-    hls_notifier_->NotifyCueEvent(stream_id_, timestamp);
+    hls_notifier_->NotifyCueEvent(stream_id_.value(), timestamp);
   }
 }
 
+bool HlsNotifyMuxerListener::NotifyNewStream() {
+  DCHECK(media_info_);
+
+  uint32_t stream_id;
+  const bool result = hls_notifier_->NotifyNewStream(
+      *media_info_, playlist_name_, ext_x_media_name_, ext_x_media_group_id_,
+      &stream_id);
+  if (!result) {
+    LOG(WARNING) << "Failed to notify new stream for VOD.";
+    return false;
+  }
+  stream_id_ = stream_id;
+  return true;
+}
+
 }  // namespace media
 }  // namespace shaka

packager/media/event/hls_notify_muxer_listener.h

@@ -7,8 +7,10 @@
 #ifndef PACKAGER_MEDIA_EVENT_HLS_NOTIFY_MUXER_LISTENER_H_
 #define PACKAGER_MEDIA_EVENT_HLS_NOTIFY_MUXER_LISTENER_H_
 
+#include <memory>
 #include <string>
 
+#include "packager/base/optional.h"
 #include "packager/media/event/event_info.h"
 #include "packager/media/event/muxer_listener.h"
 #include "packager/mpd/base/media_info.pb.h"
@@ -71,14 +73,15 @@ class HlsNotifyMuxerListener : public MuxerListener {
   HlsNotifyMuxerListener(const HlsNotifyMuxerListener&) = delete;
   HlsNotifyMuxerListener& operator=(const HlsNotifyMuxerListener&) = delete;
 
+  bool NotifyNewStream();
+
   const std::string playlist_name_;
   const bool iframes_only_;
   const std::string ext_x_media_name_;
   const std::string ext_x_media_group_id_;
   hls::HlsNotifier* const hls_notifier_;
-  uint32_t stream_id_ = 0;
+  base::Optional<uint32_t> stream_id_;
 
-  bool media_started_ = false;
   bool must_notify_encryption_start_ = false;
   // Cached encryption info before OnMediaStart() is called.
   std::vector<uint8_t> next_key_id_;
@@ -88,7 +91,7 @@ class HlsNotifyMuxerListener : public MuxerListener {
 
   // MediaInfo passed to Notifier::OnNewStream(). Mainly for single segment
   // playlists.
-  MediaInfo media_info_;
+  std::unique_ptr<MediaInfo> media_info_;
   // Even information for delayed function calls (NotifyNewSegment and
   // NotifyCueEvent) after NotifyNewStream is called in OnMediaEnd. Only needed
   // for on-demand as the functions are called immediately in live mode.

packager/media/event/hls_notify_muxer_listener_unittest.cc

@@ -18,6 +18,7 @@ namespace media {
 
 using ::testing::_;
 using ::testing::Bool;
+using ::testing::InSequence;
 using ::testing::Return;
 using ::testing::StrEq;
 using ::testing::TestWithParam;
@@ -114,6 +115,23 @@ class HlsNotifyMuxerListenerTest : public ::testing::Test {
                   kDefaultGroupId,
                   &mock_notifier_) {}
 
+  MuxerListener::MediaRanges GetMediaRanges(
+      const std::vector<Range>& segment_ranges) {
+    MuxerListener::MediaRanges ranges;
+    // We don't care about init range and index range values.
+    Range init_range;
+    init_range.start = 0;
+    init_range.end = 100;
+    Range index_range;
+    index_range.start = 101;
+    index_range.end = 200;
+
+    ranges.init_range = init_range;
+    ranges.index_range = index_range;
+    ranges.subsegment_ranges = segment_ranges;
+    return ranges;
+  }
+
   MockHlsNotifier mock_notifier_;
   HlsNotifyMuxerListener listener_;
 };
@@ -289,12 +307,6 @@ TEST_F(HlsNotifyMuxerListenerTest, OnSampleDurationReady) {
   listener_.OnSampleDurationReady(2340);
 }
 
-// Make sure it doesn't crash.
-TEST_F(HlsNotifyMuxerListenerTest, OnMediaEnd) {
-  // None of these values matter, they are not used.
-  listener_.OnMediaEnd(MuxerListener::MediaRanges(), 0);
-}
-
 TEST_F(HlsNotifyMuxerListenerTest, OnNewSegmentAndCueEvent) {
   ON_CALL(mock_notifier_, NotifyNewStream(_, _, _, _, _))
       .WillByDefault(Return(true));
@@ -332,29 +344,60 @@ TEST_F(HlsNotifyMuxerListenerTest, NoSegmentTemplateOnMediaEnd) {
   listener_.OnCueEvent(kCueStartTime, "dummy cue data");
   listener_.OnNewSegment("filename.mp4", kSegmentStartTime, kSegmentDuration,
                          kSegmentSize);
-  MuxerListener::MediaRanges ranges;
-  Range init_range;
-  init_range.start = 0;
-  init_range.end = 100;
-  Range index_range;
-  index_range.start = 101;
-  index_range.end = 200;
-  // Only one segment range for this test.
-  std::vector<Range> segment_ranges;
-  Range segment_range;
-  segment_range.start = kSegmentStartOffset;
-  segment_range.end = kSegmentStartOffset + kSegmentSize - 1;
-  segment_ranges.push_back(segment_range);
-  ranges.init_range = init_range;
-  ranges.index_range = index_range;
-  ranges.subsegment_ranges = segment_ranges;
 
   EXPECT_CALL(mock_notifier_, NotifyCueEvent(_, kCueStartTime));
   EXPECT_CALL(
       mock_notifier_,
       NotifyNewSegment(_, StrEq("filename.mp4"), kSegmentStartTime,
                        kSegmentDuration, kSegmentStartOffset, kSegmentSize));
-  listener_.OnMediaEnd(ranges, 200000);
+  listener_.OnMediaEnd(
+      GetMediaRanges(
+          {{kSegmentStartOffset, kSegmentStartOffset + kSegmentSize - 1}}),
+      200000);
+}
+
+// Verify the event handling with multiple files, i.e. multiple OnMediaStart and
+// OnMediaEnd calls.
+TEST_F(HlsNotifyMuxerListenerTest, NoSegmentTemplateOnMediaEndTwice) {
+  VideoStreamInfoParameters video_params = GetDefaultVideoStreamInfoParams();
+  std::shared_ptr<StreamInfo> video_stream_info =
+      CreateVideoStreamInfo(video_params);
+  MuxerOptions muxer_options1;
+  muxer_options1.output_file_name = "filename1.mp4";
+  MuxerOptions muxer_options2 = muxer_options1;
+  muxer_options2.output_file_name = "filename2.mp4";
+
+  InSequence in_sequence;
+
+  // Event flow for first file.
+  listener_.OnMediaStart(muxer_options1, *video_stream_info, 90000,
+                         MuxerListener::kContainerMpeg2ts);
+  listener_.OnNewSegment("filename1.mp4", kSegmentStartTime, kSegmentDuration,
+                         kSegmentSize);
+  listener_.OnCueEvent(kCueStartTime, "dummy cue data");
+
+  EXPECT_CALL(mock_notifier_, NotifyNewStream(_, _, _, _, _))
+      .WillOnce(Return(true));
+  EXPECT_CALL(mock_notifier_, NotifyNewSegment(_, StrEq("filename1.mp4"),
+                                               kSegmentStartTime, _, _, _));
+  EXPECT_CALL(mock_notifier_, NotifyCueEvent(_, kCueStartTime));
+  listener_.OnMediaEnd(
+      GetMediaRanges(
+          {{kSegmentStartOffset, kSegmentStartOffset + kSegmentSize - 1}}),
+      200000);
+
+  // Event flow for second file.
+  listener_.OnMediaStart(muxer_options2, *video_stream_info, 90000,
+                         MuxerListener::kContainerMpeg2ts);
+  listener_.OnNewSegment("filename2.mp4", kSegmentStartTime + kSegmentDuration,
+                         kSegmentDuration, kSegmentSize);
+  EXPECT_CALL(mock_notifier_,
+              NotifyNewSegment(_, StrEq("filename2.mp4"),
+                               kSegmentStartTime + kSegmentDuration, _, _, _));
+  listener_.OnMediaEnd(
+      GetMediaRanges(
+          {{kSegmentStartOffset, kSegmentStartOffset + kSegmentSize - 1}}),
+      200000);
 }
 
 // Verify that when there is a mismatch in the number of calls to
@@ -374,35 +417,16 @@ TEST_F(HlsNotifyMuxerListenerTest,
 
   listener_.OnNewSegment("filename.mp4", kSegmentStartTime, kSegmentDuration,
                          kSegmentSize);
-  MuxerListener::MediaRanges ranges;
-  Range init_range;
-  init_range.start = 0;
-  init_range.end = 100;
-  Range index_range;
-  index_range.start = 101;
-  index_range.end = 200;
-  // Only one segment range for this test.
-  std::vector<Range> segment_ranges;
-
-  Range segment_range1;
-  segment_range1.start = kSegmentStartOffset;
-  segment_range1.end = kSegmentStartOffset + kSegmentSize - 1;
-  segment_ranges.push_back(segment_range1);
-
-  Range segment_range2;
-  segment_range2.start = segment_range1.end + 1;
-  segment_range2.end = segment_range2.start + 109823;
-  segment_ranges.push_back(segment_range2);
-
-  ranges.init_range = init_range;
-  ranges.index_range = index_range;
-  ranges.subsegment_ranges = segment_ranges;
-
   EXPECT_CALL(
       mock_notifier_,
       NotifyNewSegment(_, StrEq("filename.mp4"), kSegmentStartTime,
                        kSegmentDuration, kSegmentStartOffset, kSegmentSize));
-  listener_.OnMediaEnd(ranges, 200000);
+  listener_.OnMediaEnd(
+      GetMediaRanges(
+          {{kSegmentStartOffset, kSegmentStartOffset + kSegmentSize - 1},
+           {kSegmentStartOffset + kSegmentSize,
+            kSegmentStartOffset + kSegmentSize * 2 - 1}}),
+      200000);
 }
 
 class HlsNotifyMuxerListenerKeyFrameTest : public TestWithParam<bool> {

packager/media/event/mpd_notify_muxer_listener.cc

@@ -20,7 +20,7 @@ namespace shaka {
 namespace media {
 
 MpdNotifyMuxerListener::MpdNotifyMuxerListener(MpdNotifier* mpd_notifier)
-    : mpd_notifier_(mpd_notifier), notification_id_(0), is_encrypted_(false) {
+    : mpd_notifier_(mpd_notifier), is_encrypted_(false) {
   DCHECK(mpd_notifier);
   DCHECK(mpd_notifier->dash_profile() == DashProfile::kOnDemand ||
          mpd_notifier->dash_profile() == DashProfile::kLive);
@@ -43,12 +43,14 @@ void MpdNotifyMuxerListener::OnEncryptionInfoReady(
     is_encrypted_ = true;
     return;
   }
+  if (!notification_id_)
+    return;
   DCHECK_EQ(protection_scheme, protection_scheme_);
 
   for (const ProtectionSystemSpecificInfo& info : key_system_info) {
-    std::string drm_uuid = internal::CreateUUIDString(info.system_id);
+    const std::string drm_uuid = internal::CreateUUIDString(info.system_id);
     bool updated = mpd_notifier_->NotifyEncryptionUpdate(
-        notification_id_, drm_uuid, key_id, info.psshs);
+        notification_id_.value(), drm_uuid, key_id, info.psshs);
     LOG_IF(WARNING, !updated) << "Failed to update encryption info.";
   }
 }
@@ -75,11 +77,21 @@ void MpdNotifyMuxerListener::OnMediaStart(
                                          key_system_info_, media_info.get());
   }
 
+  // The content may be splitted into multiple files, but their MediaInfo
+  // should be compatible.
+  if (media_info_ &&
+      !internal::IsMediaInfoCompatible(*media_info, *media_info_)) {
+    LOG(WARNING) << "Incompatible MediaInfo \n"
+                 << media_info->ShortDebugString() << "\n vs \n"
+                 << media_info_->ShortDebugString()
+                 << "\nThe result manifest may not be playable.";
+  }
+  media_info_ = std::move(media_info);
+
   if (mpd_notifier_->dash_profile() == DashProfile::kLive) {
-    // TODO(kqyang): Check return result.
+    if (!NotifyNewContainer())
-    mpd_notifier_->NotifyNewContainer(*media_info, &notification_id_);
+      return;
-  } else {
+    DCHECK(notification_id_);
-    media_info_ = std::move(media_info);
   }
 }
 
@@ -88,7 +100,8 @@ void MpdNotifyMuxerListener::OnMediaStart(
 void MpdNotifyMuxerListener::OnSampleDurationReady(
     uint32_t sample_duration) {
   if (mpd_notifier_->dash_profile() == DashProfile::kLive) {
-    mpd_notifier_->NotifySampleDuration(notification_id_, sample_duration);
+    mpd_notifier_->NotifySampleDuration(notification_id_.value(),
+                                        sample_duration);
     return;
   }
 
@@ -126,16 +139,21 @@ void MpdNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
     return;
   }
 
-  uint32_t id;
+  if (notification_id_) {
-  // TODO(kqyang): Check return result.
+    mpd_notifier_->NotifyMediaInfoUpdate(notification_id_.value(),
-  mpd_notifier_->NotifyNewContainer(*media_info_, &id);
+                                         *media_info_);
+  } else {
+    if (!NotifyNewContainer())
+      return;
+    DCHECK(notification_id_);
+  }
   // TODO(rkuroiwa): Use media_ranges.subsegment_ranges instead of caching the
   // subsegments.
   for (const auto& event_info : event_info_) {
     switch (event_info.type) {
       case EventInfoType::kSegment:
         mpd_notifier_->NotifyNewSegment(
-            id, event_info.segment_info.start_time,
+            notification_id_.value(), event_info.segment_info.start_time,
             event_info.segment_info.duration,
             event_info.segment_info.segment_file_size);
         break;
@@ -143,7 +161,8 @@ void MpdNotifyMuxerListener::OnMediaEnd(const MediaRanges& media_ranges,
         // NO-OP for DASH.
         break;
       case EventInfoType::kCue:
-        mpd_notifier_->NotifyCueEvent(id, event_info.cue_event_info.timestamp);
+        mpd_notifier_->NotifyCueEvent(notification_id_.value(),
+                                      event_info.cue_event_info.timestamp);
         break;
     }
   }
@@ -156,9 +175,8 @@ void MpdNotifyMuxerListener::OnNewSegment(const std::string& file_name,
                                           uint64_t duration,
                                           uint64_t segment_file_size) {
   if (mpd_notifier_->dash_profile() == DashProfile::kLive) {
-    // TODO(kqyang): Check return result.
+    mpd_notifier_->NotifyNewSegment(notification_id_.value(), start_time,
-    mpd_notifier_->NotifyNewSegment(
+                                    duration, segment_file_size);
-        notification_id_, start_time, duration, segment_file_size);
     if (mpd_notifier_->mpd_type() == MpdType::kDynamic)
       mpd_notifier_->Flush();
   } else {
@@ -179,7 +197,7 @@ void MpdNotifyMuxerListener::OnCueEvent(uint64_t timestamp,
                                         const std::string& cue_data) {
   // Not using |cue_data| at this moment.
   if (mpd_notifier_->dash_profile() == DashProfile::kLive) {
-    mpd_notifier_->NotifyCueEvent(notification_id_, timestamp);
+    mpd_notifier_->NotifyCueEvent(notification_id_.value(), timestamp);
   } else {
     EventInfo event_info;
     event_info.type = EventInfoType::kCue;
@@ -188,5 +206,15 @@ void MpdNotifyMuxerListener::OnCueEvent(uint64_t timestamp,
   }
 }
 
+bool MpdNotifyMuxerListener::NotifyNewContainer() {
+  uint32_t notification_id;
+  if (!mpd_notifier_->NotifyNewContainer(*media_info_, &notification_id)) {
+    LOG(ERROR) << "Failed to notify MpdNotifier.";
+    return false;
+  }
+  notification_id_ = notification_id;
+  return true;
+}
+
 }  // namespace media
 }  // namespace shaka

packager/media/event/mpd_notify_muxer_listener.h

@@ -12,6 +12,7 @@
 #include <memory>
 #include <vector>
 
+#include "packager/base/optional.h"
 #include "packager/media/base/muxer_options.h"
 #include "packager/media/event/event_info.h"
 #include "packager/media/event/muxer_listener.h"
@@ -60,8 +61,10 @@ class MpdNotifyMuxerListener : public MuxerListener {
   MpdNotifyMuxerListener(const MpdNotifyMuxerListener&) = delete;
   MpdNotifyMuxerListener& operator=(const MpdNotifyMuxerListener&) = delete;
 
+  bool NotifyNewContainer();
+
   MpdNotifier* const mpd_notifier_ = nullptr;
-  uint32_t notification_id_ = 0;
+  base::Optional<uint32_t> notification_id_;
   std::unique_ptr<MediaInfo> media_info_;
 
   bool is_encrypted_ = false;

packager/media/event/mpd_notify_muxer_listener_unittest.cc

@@ -23,6 +23,7 @@
 
 using ::testing::_;
 using ::testing::InSequence;
+using ::testing::Return;
 
 namespace shaka {
 
@@ -91,6 +92,11 @@ class MpdNotifyMuxerListenerTest : public ::testing::TestWithParam<MpdType> {
   std::unique_ptr<MockMpdNotifier> notifier_;
 };
 
+MATCHER_P(EqualsProto, message, "") {
+  *result_listener << arg.ShortDebugString();
+  return ::google::protobuf::util::MessageDifferencer::Equals(arg, message);
+}
+
 MATCHER_P(ExpectMediaInfoEq, expected_text_format, "") {
   const MediaInfo expected = ConvertToMediaInfo(expected_text_format);
   *result_listener << arg.ShortDebugString();
@@ -112,7 +118,8 @@ TEST_F(MpdNotifyMuxerListenerTest, VodClearContent) {
   ::testing::Mock::VerifyAndClearExpectations(notifier_.get());
 
   EXPECT_CALL(*notifier_, NotifyNewContainer(
-                              ExpectMediaInfoEq(kExpectedDefaultMediaInfo), _));
+                              ExpectMediaInfoEq(kExpectedDefaultMediaInfo), _))
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_, Flush());
   FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
 }
@@ -177,7 +184,8 @@ TEST_F(MpdNotifyMuxerListenerTest, VodEncryptedContent) {
   ::testing::Mock::VerifyAndClearExpectations(notifier_.get());
 
   EXPECT_CALL(*notifier_,
-              NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _));
+              NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _))
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_, Flush());
   FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
 }
@@ -224,7 +232,8 @@ TEST_F(MpdNotifyMuxerListenerTest, VodOnSampleDurationReady) {
   ::testing::Mock::VerifyAndClearExpectations(notifier_.get());
 
   EXPECT_CALL(*notifier_,
-              NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _));
+              NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _))
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_, Flush());
   FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
 }
@@ -258,7 +267,8 @@ TEST_F(MpdNotifyMuxerListenerTest, VodOnNewSegment) {
 
   InSequence s;
   EXPECT_CALL(*notifier_, NotifyNewContainer(
-                              ExpectMediaInfoEq(kExpectedDefaultMediaInfo), _));
+                              ExpectMediaInfoEq(kExpectedDefaultMediaInfo), _))
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_,
               NotifyNewSegment(_, kStartTime1, kDuration1, kSegmentFileSize1));
   EXPECT_CALL(*notifier_, NotifyCueEvent(_, kStartTime2));
@@ -268,6 +278,69 @@ TEST_F(MpdNotifyMuxerListenerTest, VodOnNewSegment) {
   FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
 }
 
+// Verify the event handling with multiple files, i.e. multiple OnMediaStart and
+// OnMediaEnd calls.
+TEST_F(MpdNotifyMuxerListenerTest, VodMultipleFiles) {
+  SetupForVod();
+  MuxerOptions muxer_options1;
+  SetDefaultMuxerOptions(&muxer_options1);
+  muxer_options1.output_file_name = "test_output1.mp4";
+  MuxerOptions muxer_options2 = muxer_options1;
+  muxer_options2.output_file_name = "test_output2.mp4";
+
+  MediaInfo expected_media_info1 =
+      ConvertToMediaInfo(kExpectedDefaultMediaInfo);
+  expected_media_info1.set_media_file_name("test_output1.mp4");
+  MediaInfo expected_media_info2 = expected_media_info1;
+  expected_media_info2.set_media_file_name("test_output2.mp4");
+
+  VideoStreamInfoParameters video_params = GetDefaultVideoStreamInfoParams();
+  std::shared_ptr<StreamInfo> video_stream_info =
+      CreateVideoStreamInfo(video_params);
+
+  const uint64_t kStartTime1 = 0u;
+  const uint64_t kDuration1 = 1000u;
+  const uint64_t kSegmentFileSize1 = 29812u;
+  const uint64_t kStartTime2 = 1001u;
+  const uint64_t kDuration2 = 3787u;
+  const uint64_t kSegmentFileSize2 = 83743u;
+
+  // Expectation for first file before OnMediaEnd.
+  EXPECT_CALL(*notifier_, NotifyNewContainer(_, _)).Times(0);
+  EXPECT_CALL(*notifier_, NotifyNewSegment(_, _, _, _)).Times(0);
+  listener_->OnMediaStart(muxer_options1, *video_stream_info,
+                          kDefaultReferenceTimeScale,
+                          MuxerListener::kContainerMp4);
+  listener_->OnNewSegment("", kStartTime1, kDuration1, kSegmentFileSize1);
+  listener_->OnCueEvent(kStartTime2, "dummy cue data");
+  ::testing::Mock::VerifyAndClearExpectations(notifier_.get());
+
+  // Expectation for first file OnMediaEnd.
+  InSequence s;
+  EXPECT_CALL(*notifier_,
+              NotifyNewContainer(EqualsProto(expected_media_info1), _))
+      .WillOnce(Return(true));
+  EXPECT_CALL(*notifier_,
+              NotifyNewSegment(_, kStartTime1, kDuration1, kSegmentFileSize1));
+  EXPECT_CALL(*notifier_, NotifyCueEvent(_, kStartTime2));
+  EXPECT_CALL(*notifier_, Flush());
+  FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
+
+  // Expectation for second file before OnMediaEnd.
+  listener_->OnMediaStart(muxer_options2, *video_stream_info,
+                          kDefaultReferenceTimeScale,
+                          MuxerListener::kContainerMp4);
+  listener_->OnNewSegment("", kStartTime2, kDuration2, kSegmentFileSize2);
+
+  // Expectation for second file OnMediaEnd.
+  EXPECT_CALL(*notifier_,
+              NotifyMediaInfoUpdate(_, EqualsProto(expected_media_info2)));
+  EXPECT_CALL(*notifier_,
+              NotifyNewSegment(_, kStartTime2, kDuration2, kSegmentFileSize2));
+  EXPECT_CALL(*notifier_, Flush());
+  FireOnMediaEndWithParams(GetDefaultOnMediaEndParams());
+}
+
 // Live without key rotation. Note that OnEncryptionInfoReady() is called before
 // OnMediaStart() but no more calls.
 TEST_P(MpdNotifyMuxerListenerTest, LiveNoKeyRotation) {
@@ -314,7 +387,7 @@ TEST_P(MpdNotifyMuxerListenerTest, LiveNoKeyRotation) {
   EXPECT_CALL(*notifier_, NotifyEncryptionUpdate(_, _, _, _)).Times(0);
   EXPECT_CALL(*notifier_,
               NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _))
-      .Times(1);
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_,
               NotifyNewSegment(_, kStartTime1, kDuration1, kSegmentFileSize1));
   // Flush should only be called once in OnMediaEnd.
@@ -385,7 +458,7 @@ TEST_P(MpdNotifyMuxerListenerTest, LiveWithKeyRotation) {
   InSequence s;
   EXPECT_CALL(*notifier_,
               NotifyNewContainer(ExpectMediaInfoEq(kExpectedMediaInfo), _))
-      .Times(1);
+      .WillOnce(Return(true));
   EXPECT_CALL(*notifier_, NotifyEncryptionUpdate(_, _, _, _)).Times(1);
   EXPECT_CALL(*notifier_,
               NotifyNewSegment(_, kStartTime1, kDuration1, kSegmentFileSize1));

packager/media/event/muxer_listener_internal.cc

@@ -6,6 +6,7 @@
 
 #include "packager/media/event/muxer_listener_internal.h"
 
+#include <google/protobuf/util/message_differencer.h>
 #include <math.h>
 
 #include "packager/base/logging.h"
@@ -19,6 +20,8 @@
 #include "packager/media/codecs/ec3_audio_util.h"
 #include "packager/mpd/base/media_info.pb.h"
 
+using ::google::protobuf::util::MessageDifferencer;
+
 namespace shaka {
 namespace media {
 namespace internal {
@@ -176,6 +179,19 @@ bool GenerateMediaInfo(const MuxerOptions& muxer_options,
   return true;
 }
 
+bool IsMediaInfoCompatible(const MediaInfo& media_info1,
+                           const MediaInfo& media_info2) {
+  return media_info1.reference_time_scale() ==
+             media_info2.reference_time_scale() &&
+         media_info1.container_type() == media_info2.container_type() &&
+         MessageDifferencer::Equals(media_info1.video_info(),
+                                    media_info2.video_info()) &&
+         MessageDifferencer::Equals(media_info1.audio_info(),
+                                    media_info2.audio_info()) &&
+         MessageDifferencer::Equals(media_info1.text_info(),
+                                    media_info2.text_info());
+}
+
 bool SetVodInformation(const MuxerListener::MediaRanges& media_ranges,
                        float duration_seconds,
                        MediaInfo* media_info) {

packager/media/event/muxer_listener_internal.h

@@ -33,6 +33,11 @@ bool GenerateMediaInfo(const MuxerOptions& muxer_options,
                        MuxerListener::ContainerType container_type,
                        MediaInfo* media_info);
 
+/// @return True if @a media_info1 and @a media_info2 are compatible. MediaInfos
+///         are considered to be compatible if codec and container are the same.
+bool IsMediaInfoCompatible(const MediaInfo& media_info1,
+                           const MediaInfo& media_info2);
+
 /// @param[in,out] media_info points to the MediaInfo object to be filled.
 /// @return true on success, false otherwise.
 bool SetVodInformation(const MuxerListener::MediaRanges& media_ranges,

packager/mpd/base/mock_mpd_notifier.h

@@ -37,10 +37,8 @@ class MockMpdNotifier : public MpdNotifier {
                     const std::string& drm_uuid,
                     const std::vector<uint8_t>& new_key_id,
                     const std::vector<uint8_t>& new_pssh));
-  MOCK_METHOD2(
+  MOCK_METHOD2(NotifyMediaInfoUpdate,
-      AddContentProtectionElement,
+               bool(uint32_t container_id, const MediaInfo& media_info));
-      bool(uint32_t container_id,
-           const ContentProtectionElement& content_protection_element));
   MOCK_METHOD0(Flush, bool());
 };
 

packager/mpd/base/mpd_notifier.h

@@ -92,6 +92,13 @@ class MpdNotifier {
                                       const std::vector<uint8_t>& new_key_id,
                                       const std::vector<uint8_t>& new_pssh) = 0;
 
+  /// @param container_id Container ID obtained from calling
+  ///        NotifyNewContainer().
+  /// @param media_info is the new MediaInfo. Note that codec related
+  ///        information cannot be updated.
+  virtual bool NotifyMediaInfoUpdate(uint32_t container_id,
+                                     const MediaInfo& media_info) = 0;
+
   /// Call this method to force a flush. Implementations might not write out
   /// the MPD to a stream (file, stdout, etc.) when the MPD is updated, this
   /// forces a flush.

packager/mpd/base/representation.cc

@@ -286,7 +286,7 @@ xml::scoped_xml_ptr<xmlNode> Representation::GetXml() {
 
   if (HasVODOnlyFields(media_info_) &&
       !representation.AddVODOnlyInfo(media_info_)) {
-    LOG(ERROR) << "Failed to add VOD segment info.";
+    LOG(ERROR) << "Failed to add VOD info.";
     return xml::scoped_xml_ptr<xmlNode>();
   }
 

packager/mpd/base/representation.h

@@ -145,6 +145,8 @@ class Representation {
   /// @return ID number for <Representation>.
   uint32_t id() const { return id_; }
 
+  void set_media_info(const MediaInfo& media_info) { media_info_ = media_info; }
+
  protected:
   /// @param media_info is a MediaInfo containing information on the media.
   ///        @a media_info.bandwidth is required for 'static' profile. If @a

packager/mpd/base/simple_mpd_notifier.cc

@@ -165,6 +165,22 @@ bool SimpleMpdNotifier::NotifyEncryptionUpdate(
   return true;
 }
 
+bool SimpleMpdNotifier::NotifyMediaInfoUpdate(uint32_t container_id,
+                                              const MediaInfo& media_info) {
+  base::AutoLock auto_lock(lock_);
+  auto it = representation_map_.find(container_id);
+  if (it == representation_map_.end()) {
+    LOG(ERROR) << "Unexpected container_id: " << container_id;
+    return false;
+  }
+
+  MediaInfo adjusted_media_info(media_info);
+  MpdBuilder::MakePathsRelativeToMpd(output_path_, &adjusted_media_info);
+
+  it->second->set_media_info(adjusted_media_info);
+  return true;
+}
+
 bool SimpleMpdNotifier::Flush() {
   base::AutoLock auto_lock(lock_);
   return WriteMpdToFile(output_path_, mpd_builder_.get());

packager/mpd/base/simple_mpd_notifier.h

@@ -47,6 +47,8 @@ class SimpleMpdNotifier : public MpdNotifier {
                               const std::string& drm_uuid,
                               const std::vector<uint8_t>& new_key_id,
                               const std::vector<uint8_t>& new_pssh) override;
+  bool NotifyMediaInfoUpdate(uint32_t container_id,
+                             const MediaInfo& media_info) override;
   bool Flush() override;
   /// @}