113 lines
3.4 KiB
C++
113 lines
3.4 KiB
C++
// Copyright 2014 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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//
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// This class defines the MP4 Segmenter which is responsible for organizing
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// MP4 fragments into segments/subsegments and package into a MP4 file.
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// Inherited by MP4GeneralSegmenter and MP4VODSegmenter. MP4VODSegmenter defines
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// the segmenter for DASH Video-On-Demand with a single segment for each media
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// presentation while MP4GeneralSegmenter handles all other cases including
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// DASH live profile.
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#ifndef MEDIA_MP4_MP4_SEGMENTER_H_
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#define MEDIA_MP4_MP4_SEGMENTER_H_
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#include <map>
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#include <vector>
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#include "base/memory/ref_counted.h"
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#include "base/memory/scoped_ptr.h"
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#include "media/base/status.h"
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namespace media {
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struct MuxerOptions;
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class BufferWriter;
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class EncryptorSource;
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class MediaSample;
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class MediaStream;
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namespace mp4 {
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class MP4Fragmenter;
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struct FileType;
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struct Movie;
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struct MovieFragment;
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struct SegmentIndex;
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class MP4Segmenter {
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public:
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// Caller transfers the ownership of |ftyp| and |moov| to this class.
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MP4Segmenter(const MuxerOptions& options,
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scoped_ptr<FileType> ftyp,
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scoped_ptr<Movie> moov);
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virtual ~MP4Segmenter();
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// Initialize the segmenter. Caller retains the ownership of
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// |encryptor_source|. |encryptor_source| can be NULL.
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// Calling other public methods of this class without this method returning
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// Status::OK, results in an undefined behavior.
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virtual Status Initialize(EncryptorSource* encryptor_source,
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double clear_lead_in_seconds,
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const std::vector<MediaStream*>& streams);
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virtual Status Finalize();
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virtual Status AddSample(const MediaStream* stream,
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scoped_refptr<MediaSample> sample);
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// Returns false if it does not apply.
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// If it has an initialization byte range this returns true and set |offset|
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// and |size|, otherwise returns false.
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virtual bool GetInitRange(size_t* offset, size_t* size) = 0;
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// Returns false if it does not apply.
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// If it has an index byte range this returns true and set |offset| and
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// |size|, otherwise returns false.
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virtual bool GetIndexRange(size_t* offset, size_t* size) = 0;
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uint32 GetReferenceTimeScale() const;
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// Returns the total length, in seconds, of segmented media files.
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double GetDuration() const;
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protected:
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void InitializeSegment();
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virtual Status FinalizeSegment();
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uint32 GetReferenceStreamId();
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const MuxerOptions& options() const { return options_; }
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FileType* ftyp() { return ftyp_.get(); }
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Movie* moov() { return moov_.get(); }
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BufferWriter* fragment_buffer() { return fragment_buffer_.get(); }
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SegmentIndex* sidx() { return sidx_.get(); }
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private:
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void InitializeFragments();
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Status FinalizeFragment(MP4Fragmenter* fragment);
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const MuxerOptions& options_;
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scoped_ptr<FileType> ftyp_;
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scoped_ptr<Movie> moov_;
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scoped_ptr<MovieFragment> moof_;
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scoped_ptr<BufferWriter> fragment_buffer_;
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scoped_ptr<SegmentIndex> sidx_;
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std::vector<MP4Fragmenter*> fragmenters_;
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std::vector<uint64> segment_durations_;
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std::map<const MediaStream*, uint32> stream_map_;
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bool segment_initialized_;
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bool end_of_segment_;
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DISALLOW_COPY_AND_ASSIGN(MP4Segmenter);
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};
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} // namespace mp4
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} // namespace media
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#endif // MEDIA_MP4_MP4_SEGMENTER_H_
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