Reland: Make more media APIs aware of |delay| and |delay_timestamp|

media/audio/audio_output_controller.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_
 #define MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_
 
 #include <stdint.h>
 #include <memory>
 #include <set>
@@ skipping 70 matching lines @@
   };
 
   // A synchronous reader interface used by AudioOutputController for
   // synchronous reading.
   // TODO(crogers): find a better name for this class and the Read() method
   // now that it can handle synchronized I/O.
   class SyncReader {
    public:
     virtual ~SyncReader() {}
 
-    // Notify the synchronous reader the number of bytes in the
-    // AudioOutputController not yet played. This is used by SyncReader to
-    // prepare more data and perform synchronization. Also inform about if any
-    // frames has been skipped by the renderer (typically the OS). The renderer
-    // source can handle this appropriately depending on the type of source. An
-    // ordinary file playout would ignore this.
-    virtual void UpdatePendingBytes(uint32_t bytes,
-                                    uint32_t frames_skipped) = 0;
+    // This is used by SyncReader to prepare more data and perform
+    // synchronization. Also inform about output delay at a certain moment and
+    // if any frames have been skipped by the renderer (typically the OS). The
+    // renderer source can handle this appropriately depending on the type of
+    // source. An ordinary file playout would ignore this.
+    virtual void RequestMoreData(base::TimeDelta delay,
+                                 base::TimeTicks delay_timestamp,
+                                 int prior_frames_skipped) = 0;
 
     // Attempts to completely fill |dest|, zeroing |dest| if the request can not
     // be fulfilled (due to timeout).
     virtual void Read(AudioBus* dest) = 0;
 
     // Close this synchronous reader.
     virtual void Close() = 0;
   };
 
   // Factory method for creating an AudioOutputController.
@@ skipping 175 matching lines @@
   // be accessed while |error_lock_| is held.
   bool ignore_errors_during_stop_close_;
   base::Lock error_lock_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputController);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_CONTROLLER_H_