85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
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// 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_WRITER_H_
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#define PACKAGER_MEDIA_FORMATS_MP2T_TS_WRITER_H_
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#include <list>
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#include <map>
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#include <vector>
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#include "packager/base/memory/scoped_ptr.h"
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#include "packager/media/base/media_stream.h"
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#include "packager/media/file/file.h"
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#include "packager/media/file/file_closer.h"
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#include "packager/media/formats/mp2t/pes_packet.h"
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namespace edash_packager {
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namespace media {
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namespace mp2t {
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class ContinuityCounter {
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public:
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ContinuityCounter();
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~ContinuityCounter();
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/// As specified by the spec, this starts from 0 and is incremented by 1 until
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/// it wraps back to 0 when it reaches 16.
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/// @return counter value.
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int GetNext();
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private:
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int counter_ = 0;
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DISALLOW_COPY_AND_ASSIGN(ContinuityCounter);
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};
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/// This class takes PesPackets, encapsulates them into TS packets, and write
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/// the data to file. This also creates PSI from StreamInfo.
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class TsWriter {
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public:
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TsWriter();
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~TsWriter();
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/// This must be called before calling other methods.
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/// @return true on success, false otherwise.
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bool Initialize(const StreamInfo& stream_info);
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/// This will fail if the current segment is not finalized.
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/// @param file_name is the output file name.
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/// @return true on success, false otherwise.
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bool NewSegment(const std::string& file_name);
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/// Flush all the pending PesPackets that have not been written to file and
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/// close the file.
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/// @return true on success, false otherwise.
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bool FinalizeSegment();
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/// Add PesPacket to the instance. PesPacket might not get written to file
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/// immediately.
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/// @param pes_packet gets added to the writer.
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/// @return true on success, false otherwise.
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bool AddPesPacket(scoped_ptr<PesPacket> pes_packet);
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private:
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std::vector<uint8_t> psi_ts_packets_;
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uint32_t time_scale_ = 0u;
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ContinuityCounter pmt_continuity_counter_;
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ContinuityCounter pat_continuity_counter_;
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ContinuityCounter elementary_stream_continuity_counter_;
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scoped_ptr<File, FileCloser> current_file_;
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DISALLOW_COPY_AND_ASSIGN(TsWriter);
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};
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} // namespace mp2t
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} // namespace media
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} // namespace edash_packager
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#endif // PACKAGER_MEDIA_FORMATS_MP2T_TS_WRITER_H_
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