| // Copyright 2014 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_FILTERS_FRAME_PROCESSOR_H_ |
| #define MEDIA_FILTERS_FRAME_PROCESSOR_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/callback_forward.h" |
| #include "base/time/time.h" |
| #include "media/base/media_export.h" |
| #include "media/base/stream_parser.h" |
| #include "media/filters/frame_processor_base.h" |
| |
| namespace media { |
| |
| // Helper class that implements Media Source Extension's coded frame processing |
| // algorithm. |
| class MEDIA_EXPORT FrameProcessor : public FrameProcessorBase { |
| public: |
| typedef base::Callback<void(base::TimeDelta)> UpdateDurationCB; |
| explicit FrameProcessor(const UpdateDurationCB& update_duration_cb); |
| virtual ~FrameProcessor(); |
| |
| // FrameProcessorBase implementation |
| virtual void SetSequenceMode(bool sequence_mode) OVERRIDE; |
| virtual bool ProcessFrames(const StreamParser::BufferQueue& audio_buffers, |
| const StreamParser::BufferQueue& video_buffers, |
| const StreamParser::TextBufferQueueMap& text_map, |
| base::TimeDelta append_window_start, |
| base::TimeDelta append_window_end, |
| bool* new_media_segment, |
| base::TimeDelta* timestamp_offset) OVERRIDE; |
| |
| private: |
| // Helper that processes one frame with the coded frame processing algorithm. |
| // Returns false on error or true on success. |
| bool ProcessFrame(scoped_refptr<StreamParserBuffer> frame, |
| base::TimeDelta append_window_start, |
| base::TimeDelta append_window_end, |
| base::TimeDelta* timestamp_offset, |
| bool* new_media_segment); |
| |
| // Sets the need random access point flag on all track buffers to true. |
| void SetAllTrackBuffersNeedRandomAccessPoint(); |
| |
| // Tracks the MSE coded frame processing variable of same name. It stores the |
| // highest coded frame end timestamp across all coded frames in the current |
| // coded frame group. It is set to 0 when the SourceBuffer object is created |
| // and gets updated by ProcessFrames(). |
| base::TimeDelta group_end_timestamp_; |
| |
| UpdateDurationCB update_duration_cb_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FrameProcessor); |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_FILTERS_FRAME_PROCESSOR_H_ |