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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "media/capture/webm_muxer.h" | 5 #include "media/capture/webm_muxer.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "media/base/limits.h" | 8 #include "media/base/limits.h" |
9 #include "media/base/video_frame.h" | 9 #include "media/base/video_frame.h" |
10 #include "ui/gfx/geometry/size.h" | 10 #include "ui/gfx/geometry/size.h" |
11 | 11 |
12 namespace media { | 12 namespace media { |
13 | 13 |
14 static double GetFrameRate(const scoped_refptr<VideoFrame>& video_frame) { | 14 static double GetFrameRate(const scoped_refptr<VideoFrame>& video_frame) { |
15 const double kZeroFrameRate = 0.0; | 15 const double kZeroFrameRate = 0.0; |
16 const double kDefaultFrameRate = 30.0; | 16 const double kDefaultFrameRate = 30.0; |
17 | 17 |
18 double frame_rate = kDefaultFrameRate; | 18 double frame_rate = kDefaultFrameRate; |
19 if (!video_frame->metadata()->GetDouble( | 19 if (!video_frame->metadata()->GetDouble( |
20 VideoFrameMetadata::FRAME_RATE, &frame_rate) || | 20 VideoFrameMetadata::FRAME_RATE, &frame_rate) || |
21 frame_rate <= kZeroFrameRate || | 21 frame_rate <= kZeroFrameRate || |
22 frame_rate > media::limits::kMaxFramesPerSecond) { | 22 frame_rate > media::limits::kMaxFramesPerSecond) { |
23 frame_rate = kDefaultFrameRate; | 23 frame_rate = kDefaultFrameRate; |
24 } | 24 } |
25 return frame_rate; | 25 return frame_rate; |
26 } | 26 } |
27 | 27 |
28 WebmMuxer::WebmMuxer(const WriteDataCB& write_data_callback) | 28 WebmMuxer::WebmMuxer(VideoCodec codec, const WriteDataCB& write_data_callback) |
29 : track_index_(0), | 29 : use_vp9_(codec == kCodecVP9), |
| 30 track_index_(0), |
30 write_data_callback_(write_data_callback), | 31 write_data_callback_(write_data_callback), |
31 position_(0) { | 32 position_(0) { |
32 DCHECK(!write_data_callback_.is_null()); | 33 DCHECK(!write_data_callback_.is_null()); |
| 34 DCHECK(codec == kCodecVP8 || codec == kCodecVP9) |
| 35 << " Only Vp8 and VP9 are supported in WebmMuxer"; |
33 // Creation is done on a different thread than main activities. | 36 // Creation is done on a different thread than main activities. |
34 thread_checker_.DetachFromThread(); | 37 thread_checker_.DetachFromThread(); |
35 } | 38 } |
36 | 39 |
37 WebmMuxer::~WebmMuxer() { | 40 WebmMuxer::~WebmMuxer() { |
38 // No need to segment_.Finalize() since is not Seekable(), i.e. a live | 41 // No need to segment_.Finalize() since is not Seekable(), i.e. a live |
39 // stream, but is a good practice. | 42 // stream, but is a good practice. |
40 DCHECK(thread_checker_.CalledOnValidThread()); | 43 DCHECK(thread_checker_.CalledOnValidThread()); |
41 segment_.Finalize(); | 44 segment_.Finalize(); |
42 } | 45 } |
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75 info->set_muxing_app("Chrome"); | 78 info->set_muxing_app("Chrome"); |
76 | 79 |
77 track_index_ = | 80 track_index_ = |
78 segment_.AddVideoTrack(frame_size.width(), frame_size.height(), 0); | 81 segment_.AddVideoTrack(frame_size.width(), frame_size.height(), 0); |
79 DCHECK_GT(track_index_, 0u); | 82 DCHECK_GT(track_index_, 0u); |
80 | 83 |
81 mkvmuxer::VideoTrack* const video_track = | 84 mkvmuxer::VideoTrack* const video_track = |
82 reinterpret_cast<mkvmuxer::VideoTrack*>( | 85 reinterpret_cast<mkvmuxer::VideoTrack*>( |
83 segment_.GetTrackByNumber(track_index_)); | 86 segment_.GetTrackByNumber(track_index_)); |
84 DCHECK(video_track); | 87 DCHECK(video_track); |
85 video_track->set_codec_id(mkvmuxer::Tracks::kVp8CodecId); | 88 video_track->set_codec_id(use_vp9_ ? mkvmuxer::Tracks::kVp9CodecId |
| 89 : mkvmuxer::Tracks::kVp8CodecId); |
86 DCHECK_EQ(video_track->crop_right(), 0ull); | 90 DCHECK_EQ(video_track->crop_right(), 0ull); |
87 DCHECK_EQ(video_track->crop_left(), 0ull); | 91 DCHECK_EQ(video_track->crop_left(), 0ull); |
88 DCHECK_EQ(video_track->crop_top(), 0ull); | 92 DCHECK_EQ(video_track->crop_top(), 0ull); |
89 DCHECK_EQ(video_track->crop_bottom(), 0ull); | 93 DCHECK_EQ(video_track->crop_bottom(), 0ull); |
90 | 94 |
91 video_track->set_frame_rate(frame_rate); | 95 video_track->set_frame_rate(frame_rate); |
92 video_track->set_default_duration(base::Time::kNanosecondsPerSecond / | 96 video_track->set_default_duration(base::Time::kNanosecondsPerSecond / |
93 frame_rate); | 97 frame_rate); |
94 // Segment's timestamps should be in milliseconds, DCHECK it. See | 98 // Segment's timestamps should be in milliseconds, DCHECK it. See |
95 // http://www.webmproject.org/docs/container/#muxer-guidelines | 99 // http://www.webmproject.org/docs/container/#muxer-guidelines |
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119 } | 123 } |
120 | 124 |
121 void WebmMuxer::ElementStartNotify(mkvmuxer::uint64 element_id, | 125 void WebmMuxer::ElementStartNotify(mkvmuxer::uint64 element_id, |
122 mkvmuxer::int64 position) { | 126 mkvmuxer::int64 position) { |
123 // This method gets pinged before items are sent to |write_data_callback_|. | 127 // This method gets pinged before items are sent to |write_data_callback_|. |
124 DCHECK_GE(position, position_.ValueOrDefault(0)) | 128 DCHECK_GE(position, position_.ValueOrDefault(0)) |
125 << "Can't go back in a live WebM stream."; | 129 << "Can't go back in a live WebM stream."; |
126 } | 130 } |
127 | 131 |
128 } // namespace media | 132 } // namespace media |
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