1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*****************************************************************
|
| AP4 - MPEG2 Transport Streams
|
| Copyright 2002-2009 Axiomatic Systems, LLC
|
|
| This file is part of Bento4/AP4 (MP4 Atom Processing Library).
|
| Unless you have obtained Bento4 under a difference license,
| this version of Bento4 is Bento4|GPL.
| Bento4|GPL is free software; you can redistribute it and/or modify
| it under the terms of the GNU General Public License as published by
| the Free Software Foundation; either version 2, or (at your option)
| any later version.
|
| Bento4|GPL is distributed in the hope that it will be useful,
| but WITHOUT ANY WARRANTY; without even the implied warranty of
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
| GNU General Public License for more details.
|
| You should have received a copy of the GNU General Public License
| along with Bento4|GPL; see the file COPYING. If not, write to the
| Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
| 02111-1307, USA.
|
****************************************************************/
#ifndef _AP4_MPEG2_TS_H_
#define _AP4_MPEG2_TS_H_
/*----------------------------------------------------------------------
| includes
+---------------------------------------------------------------------*/
#include "Ap4Types.h"
#include "Ap4DataBuffer.h"
/*----------------------------------------------------------------------
| classes
+---------------------------------------------------------------------*/
class AP4_ByteStream;
class AP4_Sample;
class AP4_SampleDescription;
/*----------------------------------------------------------------------
| constants
+---------------------------------------------------------------------*/
const AP4_UI16 AP4_MPEG2_TS_DEFAULT_PID_PMT = 0x100;
const AP4_UI16 AP4_MPEG2_TS_DEFAULT_PID_AUDIO = 0x101;
const AP4_UI16 AP4_MPEG2_TS_DEFAULT_PID_VIDEO = 0x102;
const AP4_UI16 AP4_MPEG2_TS_DEFAULT_STREAM_ID_AUDIO = 0xc0;
const AP4_UI16 AP4_MPEG2_TS_DEFAULT_STREAM_ID_VIDEO = 0xe0;
const AP4_UI16 AP4_MPEG2_TS_STREAM_ID_PRIVATE_STREAM_1 = 0xbd;
const AP4_UI08 AP4_MPEG2_STREAM_TYPE_ISO_IEC_13818_1_PES = 0x06;
const AP4_UI08 AP4_MPEG2_STREAM_TYPE_ISO_IEC_13818_7 = 0x0F;
const AP4_UI08 AP4_MPEG2_STREAM_TYPE_AVC = 0x1B;
const AP4_UI08 AP4_MPEG2_STREAM_TYPE_HEVC = 0x24;
const AP4_UI08 AP4_MPEG2_STREAM_TYPE_ATSC_AC3 = 0x81;
/*----------------------------------------------------------------------
| AP4_Mpeg2TsWriter
+---------------------------------------------------------------------*/
/**
* This class is a simple implementation of a converter that can
* convert MP4 audio and video access units into an MPEG2 transport
* stream.
* It currently only supports one audio tracks with MPEG4 AAC LC, and one
* video track with MPEG4 AVC.
*/
class AP4_Mpeg2TsWriter
{
public:
// classes
class Stream {
public:
Stream(AP4_UI16 pid) : m_PID(pid), m_ContinuityCounter(0) {}
virtual ~Stream() {}
AP4_UI16 GetPID() { return m_PID; }
void WritePacketHeader(bool payload_start,
unsigned int& payload_size,
bool with_pcr,
AP4_UI64 pcr,
AP4_ByteStream& output);
private:
AP4_UI16 m_PID;
unsigned int m_ContinuityCounter;
};
class SampleStream : public Stream {
public:
SampleStream(AP4_UI16 pid, AP4_UI08 stream_type, AP4_UI16 stream_id, AP4_UI32 timescale, const AP4_UI08* descriptor, AP4_Size descriptor_length) :
Stream(pid),
m_StreamType(stream_type),
m_StreamId(stream_id),
m_TimeScale(timescale) {
if (descriptor && descriptor_length) {
m_Descriptor.SetData(descriptor, descriptor_length);
}
}
virtual AP4_Result WritePES(const unsigned char* data,
unsigned int data_size,
AP4_UI64 dts,
bool with_dts,
AP4_UI64 pts,
bool with_pcr,
AP4_ByteStream& output);
virtual AP4_Result WriteSample(AP4_Sample& sample,
AP4_DataBuffer& sample_data,
AP4_SampleDescription* sample_description,
bool with_pcr,
AP4_ByteStream& output) = 0;
AP4_Result WriteSample(AP4_Sample& sample,
AP4_SampleDescription* sample_description,
bool with_pcr,
AP4_ByteStream& output);
void SetType(AP4_UI08 type) {m_StreamType = type;}
AP4_UI08 m_StreamType;
AP4_UI16 m_StreamId;
AP4_UI32 m_TimeScale;
AP4_DataBuffer m_Descriptor;
};
// constructor
AP4_Mpeg2TsWriter(AP4_UI16 pmt_pid = AP4_MPEG2_TS_DEFAULT_PID_PMT);
~AP4_Mpeg2TsWriter();
Stream* GetPAT() { return m_PAT; }
Stream* GetPMT() { return m_PMT; }
AP4_Result WritePAT(AP4_ByteStream& output);
AP4_Result WritePMT(AP4_ByteStream& output);
AP4_Result SetAudioStream(AP4_UI32 timescale,
AP4_UI08 stream_type,
AP4_UI16 stream_id,
SampleStream*& stream,
AP4_UI16 pid = AP4_MPEG2_TS_DEFAULT_PID_AUDIO,
const AP4_UI08* descriptor = NULL,
AP4_Size descriptor_length = 0);
AP4_Result SetVideoStream(AP4_UI32 timescale,
AP4_UI08 stream_type,
AP4_UI16 stream_id,
SampleStream*& stream,
AP4_UI16 pid = AP4_MPEG2_TS_DEFAULT_PID_VIDEO,
const AP4_UI08* descriptor = NULL,
AP4_Size descriptor_length = 0);
private:
Stream* m_PAT;
Stream* m_PMT;
SampleStream* m_Audio;
SampleStream* m_Video;
};
#endif // _AP4_MPEG2_TS_H_
|
