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Side by Side Diff: media/filters/frame_processor.cc

Issue 2379653004: Rename MediaSourceState -> SourceBufferState (Closed)
Patch Set: nits Created 4 years, 2 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved. 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 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/filters/frame_processor.h" 5 #include "media/filters/frame_processor.h"
6 6
7 #include <stdint.h> 7 #include <stdint.h>
8 8
9 #include <cstdlib> 9 #include <cstdlib>
10 10
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452 const scoped_refptr<StreamParserBuffer>& frame, 452 const scoped_refptr<StreamParserBuffer>& frame,
453 base::TimeDelta append_window_start, 453 base::TimeDelta append_window_start,
454 base::TimeDelta append_window_end, 454 base::TimeDelta append_window_end,
455 base::TimeDelta* timestamp_offset) { 455 base::TimeDelta* timestamp_offset) {
456 // Implements the loop within step 1 of the coded frame processing algorithm 456 // Implements the loop within step 1 of the coded frame processing algorithm
457 // for a single input frame per June 9, 2016 MSE spec editor's draft: 457 // for a single input frame per June 9, 2016 MSE spec editor's draft:
458 // https://rawgit.com/w3c/media-source/d8f901f22/ 458 // https://rawgit.com/w3c/media-source/d8f901f22/
459 // index.html#sourcebuffer-coded-frame-processing 459 // index.html#sourcebuffer-coded-frame-processing
460 while (true) { 460 while (true) {
461 // 1. Loop Top: 461 // 1. Loop Top:
462 // Otherwise case: (See MediaSourceState's |auto_update_timestamp_offset_|, 462 // Otherwise case: (See SourceBufferState's |auto_update_timestamp_offset_|,
463 // too). 463 // too).
464 // 1.1. Let presentation timestamp be a double precision floating point 464 // 1.1. Let presentation timestamp be a double precision floating point
465 // representation of the coded frame's presentation timestamp in 465 // representation of the coded frame's presentation timestamp in
466 // seconds. 466 // seconds.
467 // 1.2. Let decode timestamp be a double precision floating point 467 // 1.2. Let decode timestamp be a double precision floating point
468 // representation of the coded frame's decode timestamp in seconds. 468 // representation of the coded frame's decode timestamp in seconds.
469 // 2. Let frame duration be a double precision floating point representation 469 // 2. Let frame duration be a double precision floating point representation
470 // of the coded frame's duration in seconds. 470 // of the coded frame's duration in seconds.
471 // We use base::TimeDelta and DecodeTimestamp instead of double. 471 // We use base::TimeDelta and DecodeTimestamp instead of double.
472 base::TimeDelta presentation_timestamp = frame->timestamp(); 472 base::TimeDelta presentation_timestamp = frame->timestamp();
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728 // timestamp. 728 // timestamp.
729 track_buffer->SetHighestPresentationTimestampIfIncreased( 729 track_buffer->SetHighestPresentationTimestampIfIncreased(
730 frame_end_timestamp); 730 frame_end_timestamp);
731 731
732 // 20. If frame end timestamp is greater than group end timestamp, then set 732 // 20. If frame end timestamp is greater than group end timestamp, then set
733 // group end timestamp equal to frame end timestamp. 733 // group end timestamp equal to frame end timestamp.
734 if (frame_end_timestamp > group_end_timestamp_) 734 if (frame_end_timestamp > group_end_timestamp_)
735 group_end_timestamp_ = frame_end_timestamp; 735 group_end_timestamp_ = frame_end_timestamp;
736 DCHECK(group_end_timestamp_ >= base::TimeDelta()); 736 DCHECK(group_end_timestamp_ >= base::TimeDelta());
737 737
738 // Step 21 is currently handled differently. See MediaSourceState's 738 // Step 21 is currently handled differently. See SourceBufferState's
739 // |auto_update_timestamp_offset_|. 739 // |auto_update_timestamp_offset_|.
740 return true; 740 return true;
741 } 741 }
742 742
743 NOTREACHED(); 743 NOTREACHED();
744 return false; 744 return false;
745 } 745 }
746 746
747 } // namespace media 747 } // namespace media
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