124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
// Copyright 2016 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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#ifndef PACKAGER_MEDIA_FORMATS_MP2T_TS_SEGMENTER_H_
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#define PACKAGER_MEDIA_FORMATS_MP2T_TS_SEGMENTER_H_
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#include <memory>
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#include "packager/media/base/media_stream.h"
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#include "packager/media/base/muxer_options.h"
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#include "packager/media/base/status.h"
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#include "packager/media/file/file.h"
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#include "packager/media/formats/mp2t/pes_packet_generator.h"
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#include "packager/media/formats/mp2t/ts_writer.h"
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namespace shaka {
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namespace media {
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class KeySource;
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class MuxerListener;
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namespace mp2t {
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// TODO(rkuroiwa): For now, this implements multifile segmenter. Like other
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// make this an abstract super class and implement multifile and single file
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// segmenters.
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class TsSegmenter {
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public:
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// TODO(rkuroiwa): Add progress listener?
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/// @param options is the options for this muxer. This must stay valid
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/// throughout the life time of the instance.
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/// @param listener is the MuxerListener that should be used to notify events.
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/// This may be null, in which case no events are sent.
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TsSegmenter(const MuxerOptions& options, MuxerListener* listener);
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~TsSegmenter();
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/// Initialize the object.
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/// Key rotation is not supported.
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/// @param stream_info is the stream info for the segmenter.
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/// @return OK on success.
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Status Initialize(const StreamInfo& stream_info,
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KeySource* encryption_key_source,
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uint32_t max_sd_pixels,
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double clear_lead_in_seconds);
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/// Finalize the segmenter.
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/// @return OK on success.
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Status Finalize();
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/// @param sample gets added to this object.
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/// @return OK on success.
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Status AddSample(scoped_refptr<MediaSample> sample);
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/// Only for testing.
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void InjectTsWriterForTesting(std::unique_ptr<TsWriter> writer);
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/// Only for testing.
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void InjectPesPacketGeneratorForTesting(
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std::unique_ptr<PesPacketGenerator> generator);
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/// Only for testing.
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void SetTsWriterFileOpenedForTesting(bool value);
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private:
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Status OpenNewSegmentIfClosed(uint32_t next_pts);
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// Writes PES packets (carried in TsPackets) to a file. If a file is not open,
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// it will open one. This will not close the file.
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Status WritePesPacketsToFile();
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// Flush all the samples that are (possibly) buffered and write them to the
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// current segment, this will close the file. If a file is not already opened
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// before calling this, this will open one and write them to file.
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Status Flush();
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// If conditions are met, notify objects that the data is encrypted.
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Status NotifyEncrypted();
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const MuxerOptions& muxer_options_;
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MuxerListener* const listener_;
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// Scale used to scale the input stream to TS's timesccale (which is 90000).
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// Used for calculating the duration in seconds fo the current segment.
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double timescale_scale_ = 1.0;
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// This is the sum of the durations of the samples that were added to
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// PesPacketGenerator for the current segment (in seconds). Note that this is
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// not necessarily the same as the length of the PesPackets that have been
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// written to the current segment in WritePesPacketsToFile().
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double current_segment_total_sample_duration_ = 0.0;
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// Used for segment template.
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uint64_t segment_number_ = 0;
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std::unique_ptr<TsWriter> ts_writer_;
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// Set to true if TsWriter::NewFile() succeeds, set to false after
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// TsWriter::FinalizeFile() succeeds.
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bool ts_writer_file_opened_ = false;
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std::unique_ptr<PesPacketGenerator> pes_packet_generator_;
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// For OnNewSegment().
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uint64_t current_segment_start_time_ = 0;
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// Path of the current segment so that File::GetFileSize() can be used after
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// the segment has been finalized.
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std::string current_segment_path_;
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std::unique_ptr<EncryptionKey> encryption_key_;
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double clear_lead_in_seconds_ = 0;
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// The total duration of the segments that it has segmented. This only
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// includes segments that have been finailzed. IOW, this does not count the
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// current segments duration.
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double total_duration_in_seconds_ = 0.0;
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DISALLOW_COPY_AND_ASSIGN(TsSegmenter);
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};
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} // namespace mp2t
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} // namespace media
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} // namespace shaka
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#endif // PACKAGER_MEDIA_FORMATS_MP2T_TS_SEGMENTER_H_
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