1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef MEDIA_FILTERS_FRAME_PROCESSOR_H_
6 #define MEDIA_FILTERS_FRAME_PROCESSOR_H_
8 #include "base/basictypes.h"
9 #include "base/callback_forward.h"
10 #include "base/time/time.h"
11 #include "media/base/media_export.h"
12 #include "media/base/stream_parser.h"
13 #include "media/filters/frame_processor_base.h"
17 // Helper class that implements Media Source Extension's coded frame processing
19 class MEDIA_EXPORT FrameProcessor : public FrameProcessorBase {
21 typedef base::Callback<void(base::TimeDelta)> UpdateDurationCB;
22 explicit FrameProcessor(const UpdateDurationCB& update_duration_cb);
23 virtual ~FrameProcessor();
25 // FrameProcessorBase implementation
26 virtual void SetSequenceMode(bool sequence_mode) OVERRIDE;
27 virtual bool ProcessFrames(const StreamParser::BufferQueue& audio_buffers,
28 const StreamParser::BufferQueue& video_buffers,
29 const StreamParser::TextBufferQueueMap& text_map,
30 base::TimeDelta append_window_start,
31 base::TimeDelta append_window_end,
32 bool* new_media_segment,
33 base::TimeDelta* timestamp_offset) OVERRIDE;
36 // Helper that processes one frame with the coded frame processing algorithm.
37 // Returns false on error or true on success.
38 bool ProcessFrame(scoped_refptr<StreamParserBuffer> frame,
39 base::TimeDelta append_window_start,
40 base::TimeDelta append_window_end,
41 base::TimeDelta* timestamp_offset,
42 bool* new_media_segment);
44 // Sets the need random access point flag on all track buffers to true.
45 void SetAllTrackBuffersNeedRandomAccessPoint();
47 // Tracks the MSE coded frame processing variable of same name. It stores the
48 // highest coded frame end timestamp across all coded frames in the current
49 // coded frame group. It is set to 0 when the SourceBuffer object is created
50 // and gets updated by ProcessFrames().
51 base::TimeDelta group_end_timestamp_;
53 UpdateDurationCB update_duration_cb_;
55 DISALLOW_COPY_AND_ASSIGN(FrameProcessor);
60 #endif // MEDIA_FILTERS_FRAME_PROCESSOR_H_