Upstream version 7.36.149.0

[platform/framework/web/crosswalk.git] / src / media / base / stream_parser.h

diff --git a/src/media/base/stream_parser.h b/src/media/base/stream_parser.h
index 39dbc34..398e8e0 100644 (file)
--- a/src/media/base/stream_parser.h
+++ b/src/media/base/stream_parser.h
@@ -8,6 +8,7 @@
 #include <deque>
 #include <map>
 #include <string>
+#include <vector>
 
 #include "base/callback_forward.h"
 #include "base/memory/ref_counted.h"
@@ -28,22 +29,47 @@ class MEDIA_EXPORT StreamParser {
  public:
   typedef std::deque<scoped_refptr<StreamParserBuffer> > BufferQueue;
 
-  // Map of text track number to the track configuration.
-  typedef std::map<int, TextTrackConfig> TextTrackConfigMap;
+  // Range of |TrackId| is dependent upon stream parsers. It is currently
+  // the key for the buffer's text track config in the applicable
+  // TextTrackConfigMap (which is passed in StreamParser::NewConfigCB), or
+  // 0 for other media types that currently allow at most one track.
+  // WebMTracksParser uses -1 as an invalid text track number.
+  // TODO(wolenetz/acolwell): Change to size_type while fixing stream parsers to
+  // emit validated track configuration and buffer vectors rather than max 1
+  // audio, max 1 video, and N text tracks in a map keyed by
+  // bytestream-specific-ranged track numbers. See http://crbug.com/341581.
+  typedef int TrackId;
 
-  // Map of text track number to decode-timestamp-ordered buffers for the track.
-  typedef std::map<int, const BufferQueue> TextBufferQueueMap;
+  // Map of text track ID to the track configuration.
+  typedef std::map<TrackId, TextTrackConfig> TextTrackConfigMap;
 
-  StreamParser();
-  virtual ~StreamParser();
+  // Map of text track ID to decode-timestamp-ordered buffers for the track.
+  typedef std::map<TrackId, const BufferQueue> TextBufferQueueMap;
+
+  // Stream parameters passed in InitCB.
+  struct InitParameters {
+    InitParameters(base::TimeDelta duration);
+
+    // Stream duration.
+    base::TimeDelta duration;
+
+    // Indicates the source time associated with presentation timestamp 0. A
+    // null Time is returned if no mapping to Time exists.
+    base::Time timeline_offset;
+
+    // Indicates that timestampOffset should be updated based on the earliest
+    // end timestamp (audio or video) provided during each NewBuffersCB.
+    bool auto_update_timestamp_offset;
+
+    // Indicates live stream.
+    Demuxer::Liveness liveness;
+  };
 
   // Indicates completion of parser initialization.
-  // First parameter - Indicates initialization success. Set to true if
-  //                   initialization was successful. False if an error
-  //                   occurred.
-  // Second parameter -  Indicates the stream duration. Only contains a valid
-  //                     value if the first parameter is true.
-  typedef base::Callback<void(bool, base::TimeDelta)> InitCB;
+  //   success - True if initialization was successful.
+  //   params - Stream parameters, in case of successful initialization.
+  typedef base::Callback<void(bool success,
+                              const InitParameters& params)> InitCB;
 
   // Indicates when new stream configurations have been parsed.
   // First parameter - The new audio configuration. If the config is not valid
@@ -83,6 +109,9 @@ class MEDIA_EXPORT StreamParser {
   typedef base::Callback<void(const std::string&,
                               const std::vector<uint8>&)> NeedKeyCB;
 
+  StreamParser();
+  virtual ~StreamParser();
+
   // Initializes the parser with necessary callbacks. Must be called before any
   // data is passed to Parse(). |init_cb| will be called once enough data has
   // been parsed to determine the initial stream configurations, presentation
@@ -111,6 +140,23 @@ class MEDIA_EXPORT StreamParser {
   DISALLOW_COPY_AND_ASSIGN(StreamParser);
 };
 
+// Appends to |merged_buffers| the provided buffers in decode-timestamp order.
+// Any previous contents of |merged_buffers| is assumed to have lower
+// decode timestamps versus the provided buffers. All provided buffer queues
+// are assumed to already be in decode-timestamp order.
+// Returns false if any of the provided audio/video/text buffers are found
+// to not be in decode timestamp order, or have a decode timestamp less than
+// the last buffer, if any, in |merged_buffers|. Partial results may exist
+// in |merged_buffers| in this case. Returns true on success.
+// No validation of media type within the various buffer queues is done here.
+// TODO(wolenetz/acolwell): Merge incrementally in parsers to eliminate
+// subtle issues with tie-breaking. See http://crbug.com/338484.
+MEDIA_EXPORT bool MergeBufferQueues(
+    const StreamParser::BufferQueue& audio_buffers,
+    const StreamParser::BufferQueue& video_buffers,
+    const StreamParser::TextBufferQueueMap& text_buffers,
+    StreamParser::BufferQueue* merged_buffers);
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_STREAM_PARSER_H_