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| 1 // Copyright 2015 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. |
| 4 |
| 5 #ifndef MEDIA_FILTERS_LIBWEBM_MUXER_H_ |
| 6 #define MEDIA_FILTERS_LIBWEBM_MUXER_H_ |
| 7 |
| 8 #include "base/callback.h" |
| 9 #include "base/macros.h" |
| 10 #include "base/threading/thread_checker.h" |
| 11 #include "base/time/time.h" |
| 12 #include "media/base/media_export.h" |
| 13 #include "third_party/libwebm/source/mkvmuxer.hpp" |
| 14 #include "ui/gfx/geometry/size.h" |
| 15 |
| 16 namespace media { |
| 17 |
| 18 class MEDIA_EXPORT WebmMuxer : public mkvmuxer::IMkvWriter { |
| 19 public: |
| 20 typedef base::Callback<void(const char*, int, bool)> WriteDataCB; |
| 21 |
| 22 explicit WebmMuxer(const WriteDataCB& write_data_callback); |
| 23 ~WebmMuxer() override; |
| 24 |
| 25 void OnEncodedVideo(int track_index, |
| 26 const std::string& encoded_data, |
| 27 const base::TimeTicks& timestamp, |
| 28 bool keyframe, |
| 29 const gfx::Size& frame_size, |
| 30 double frame_rate); |
| 31 |
| 32 private: |
| 33 // Add a new video track when receiving the first frame. |
| 34 bool AddVideoTrack(const gfx::Size& frame_size, |
| 35 double frame_rate, |
| 36 int track_index_starting_from_one); |
| 37 |
| 38 // IMkvWriter interface. |
| 39 mkvmuxer::int32 Write(const void* buf, mkvmuxer::uint32 len) override; |
| 40 mkvmuxer::int64 Position() const override; |
| 41 mkvmuxer::int32 Position(mkvmuxer::int64 position) override; |
| 42 bool Seekable() const override; |
| 43 void ElementStartNotify(mkvmuxer::uint64 element_id, |
| 44 mkvmuxer::int64 position) override; |
| 45 |
| 46 // Used to DCHECK that we are called on the correct thread. |
| 47 base::ThreadChecker thread_checker_; |
| 48 |
| 49 // Callback to dump written data as being called by libwebm. |
| 50 const WriteDataCB write_data_callback_; |
| 51 |
| 52 // Class creation time. |
| 53 const base::TimeTicks time_start_; |
| 54 |
| 55 // Rolling counter of the position in bytes of the written goo. |
| 56 int64_t position_; |
| 57 |
| 58 std::vector<int> track_indexes_; |
| 59 |
| 60 // Owned pointer to the MkvMuxer active element. |
| 61 scoped_ptr<mkvmuxer::Segment> segment_; |
| 62 |
| 63 DISALLOW_COPY_AND_ASSIGN(WebmMuxer); |
| 64 }; |
| 65 |
| 66 } // namespace media |
| 67 |
| 68 #endif // MEDIA_FILTERS_LIBWEBM_MUXER_H_ |
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