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