74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_FORMATS_MP2T_TS_PACKET_H_
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#define MEDIA_FORMATS_MP2T_TS_PACKET_H_
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#include "base/basictypes.h"
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namespace media {
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class BitReader;
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namespace mp2t {
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class TsPacket {
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public:
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static const int kPacketSize = 188;
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// Return the number of bytes to discard
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// to be synchronized on a TS syncword.
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static int Sync(const uint8* buf, int size);
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// Parse a TS packet.
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// Return a TsPacket only when parsing was successful.
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// Return NULL otherwise.
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static TsPacket* Parse(const uint8* buf, int size);
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~TsPacket();
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// TS header accessors.
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bool payload_unit_start_indicator() const {
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return payload_unit_start_indicator_;
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}
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int pid() const { return pid_; }
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int continuity_counter() const { return continuity_counter_; }
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bool discontinuity_indicator() const { return discontinuity_indicator_; }
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bool random_access_indicator() const { return random_access_indicator_; }
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// Return the offset and the size of the payload.
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const uint8* payload() const { return payload_; }
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int payload_size() const { return payload_size_; }
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private:
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TsPacket();
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// Parse an Mpeg2 TS header.
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// The buffer size should be at least |kPacketSize|
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bool ParseHeader(const uint8* buf);
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bool ParseAdaptationField(BitReader* bit_reader,
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int adaptation_field_length);
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// Size of the payload.
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const uint8* payload_;
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int payload_size_;
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// TS header.
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bool payload_unit_start_indicator_;
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int pid_;
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int continuity_counter_;
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// Params from the adaptation field.
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bool discontinuity_indicator_;
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bool random_access_indicator_;
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DISALLOW_COPY_AND_ASSIGN(TsPacket);
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};
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} // namespace mp2t
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} // namespace media
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#endif
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