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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 #include "media/filters/webm_muxer.h" |
| 6 |
| 7 #include "base/time/time.h" |
| 8 |
| 9 namespace media { |
| 10 |
| 11 WebmMuxer::WebmMuxer(const WriteDataCB& write_data_callback) |
| 12 : write_data_callback_(write_data_callback), |
| 13 time_start_(base::TimeTicks::Now()), |
| 14 position_(0), |
| 15 segment_(new mkvmuxer::Segment()) { |
| 16 DVLOG(3) << __FUNCTION__; |
| 17 DCHECK(thread_checker_.CalledOnValidThread()); |
| 18 segment_->Init(this); |
| 19 segment_->set_mode(mkvmuxer::Segment::kLive); |
| 20 |
| 21 // DateUTC is specified in nanoseconds from 0:00 on January 1st, 2001. |
| 22 base::Time::Exploded millennium_exploded = {}; |
| 23 millennium_exploded.year = 2001; |
| 24 millennium_exploded.month = 1; |
| 25 millennium_exploded.day_of_month = 1; |
| 26 segment_->GetSegmentInfo()->set_date_utc( |
| 27 (base::Time::Now() - base::Time::FromUTCExploded(millennium_exploded)) |
| 28 .InMicroseconds() * |
| 29 base::Time::kNanosecondsPerMicrosecond); |
| 30 |
| 31 mkvmuxer::SegmentInfo* const info = segment_->GetSegmentInfo(); |
| 32 info->set_writing_app("Chrome"); |
| 33 info->set_muxing_app("Chrome"); |
| 34 } |
| 35 |
| 36 WebmMuxer::~WebmMuxer() { |
| 37 DCHECK(thread_checker_.CalledOnValidThread()); |
| 38 DVLOG(3) << __FUNCTION__; |
| 39 } |
| 40 |
| 41 void WebmMuxer::OnEncodedVideo(int track_index, |
| 42 const std::string& encoded_data, |
| 43 const base::TimeTicks& timestamp, |
| 44 bool keyframe, |
| 45 const gfx::Size& frame_size, |
| 46 double frame_rate) { |
| 47 DVLOG(3) << __FUNCTION__; |
| 48 DCHECK(thread_checker_.CalledOnValidThread()); |
| 49 |
| 50 const int track_index_starting_from_one = track_index + 1; |
| 51 |
| 52 if (std::find(track_indexes_.begin(), track_indexes_.end(), |
| 53 track_index_starting_from_one) == track_indexes_.end()) { |
| 54 AddVideoTrack(frame_size, frame_rate, track_index_starting_from_one); |
| 55 track_indexes_.push_back(track_index_starting_from_one); |
| 56 } |
| 57 |
| 58 const int64 time_code = (timestamp - time_start_).InMicroseconds() * |
| 59 base::Time::kNanosecondsPerMicrosecond; |
| 60 segment_->AddFrame(reinterpret_cast<const uint8_t*>(encoded_data.data()), |
| 61 encoded_data.size(), |
| 62 track_index_starting_from_one, |
| 63 time_code, |
| 64 keyframe); |
| 65 |
| 66 DVLOG(3) << __FUNCTION__ << " length=" << encoded_data.size() |
| 67 << (keyframe ? " keyframe" : "") << ", time_code=" << time_code; |
| 68 } |
| 69 |
| 70 bool WebmMuxer::AddVideoTrack(const gfx::Size& frame_size, |
| 71 double frame_rate, |
| 72 int track_index_starting_from_one) { |
| 73 DVLOG(3) << __FUNCTION__ << " size=" << frame_size.ToString() << " " |
| 74 << frame_rate << "fps, index: " << track_index_starting_from_one; |
| 75 DCHECK(thread_checker_.CalledOnValidThread()); |
| 76 |
| 77 segment_->AddVideoTrack(frame_size.width(), frame_size.height(), |
| 78 track_index_starting_from_one); |
| 79 mkvmuxer::VideoTrack* video_track = reinterpret_cast<mkvmuxer::VideoTrack*>( |
| 80 segment_->GetTrackByNumber(track_index_starting_from_one)); |
| 81 |
| 82 video_track->set_codec_id(mkvmuxer::Tracks::kVp8CodecId); |
| 83 video_track->set_crop_right(0); |
| 84 video_track->set_crop_bottom(0); |
| 85 video_track->set_frame_rate(frame_rate); |
| 86 video_track->set_default_duration(33); // kFrameIntervalNs / 3); |
| 87 |
| 88 return true; |
| 89 } |
| 90 |
| 91 mkvmuxer::int32 WebmMuxer::Write(const void* buf, mkvmuxer::uint32 len) { |
| 92 DVLOG(3) << __FUNCTION__ << " length=" << len; |
| 93 DCHECK(thread_checker_.CalledOnValidThread()); |
| 94 // TODO(mcasas): Last parameter is |last_in_slice|, how to calculate it? |
| 95 write_data_callback_.Run(static_cast<const char*>(buf), len, false); |
| 96 position_ += len; |
| 97 return 0; |
| 98 } |
| 99 |
| 100 mkvmuxer::int64 WebmMuxer::Position() const { |
| 101 return position_; |
| 102 } |
| 103 |
| 104 mkvmuxer::int32 WebmMuxer::Position(mkvmuxer::int64 position) { |
| 105 // NOTREACHED(); |
| 106 return -1; |
| 107 } |
| 108 |
| 109 bool WebmMuxer::Seekable() const { |
| 110 return false; |
| 111 } |
| 112 |
| 113 void WebmMuxer::ElementStartNotify(mkvmuxer::uint64 element_id, |
| 114 mkvmuxer::int64 position) { |
| 115 // NOTIMPLEMENTED(); |
| 116 } |
| 117 |
| 118 } // namespace media |
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