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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
/*
* mpegtspacketizer.h -
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef GST_MPEGTS_PACKETIZER_H
#define GST_MPEGTS_PACKETIZER_H
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
#include <glib.h>
#include "gstmpegdefs.h"
#define MPEGTS_NORMAL_PACKETSIZE 188
#define MPEGTS_M2TS_PACKETSIZE 192
#define MPEGTS_DVB_ASI_PACKETSIZE 204
#define MPEGTS_ATSC_PACKETSIZE 208
#define MPEGTS_MIN_PACKETSIZE MPEGTS_NORMAL_PACKETSIZE
#define MPEGTS_MAX_PACKETSIZE MPEGTS_ATSC_PACKETSIZE
#define MPEGTS_AFC_PCR_FLAG 0x10
#define MPEGTS_AFC_OPCR_FLAG 0x08
#define MAX_WINDOW 512
G_BEGIN_DECLS
#define GST_TYPE_MPEGTS_PACKETIZER \
(mpegts_packetizer_get_type())
#define GST_MPEGTS_PACKETIZER(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEGTS_PACKETIZER,MpegTSPacketizer2))
#define GST_MPEGTS_PACKETIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEGTS_PACKETIZER,MpegTSPacketizer2Class))
#define GST_IS_MPEGTS_PACKETIZER(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEGTS_PACKETIZER))
#define GST_IS_MPEGTS_PACKETIZER_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEGTS_PACKETIZER))
typedef struct _MpegTSPacketizer2 MpegTSPacketizer2;
typedef struct _MpegTSPacketizer2Class MpegTSPacketizer2Class;
typedef struct
{
guint continuity_counter;
GstAdapter *section_adapter;
guint8 section_table_id;
guint section_length;
GSList *subtables;
guint64 offset;
} MpegTSPacketizerStream;
struct _MpegTSPacketizer2 {
GObject object;
GstAdapter *adapter;
/* streams hashed by pid */
MpegTSPacketizerStream **streams;
gboolean disposed;
gboolean know_packet_size;
guint16 packet_size;
GstCaps *caps;
/* current offset of the tip of the adapter */
guint64 offset;
gboolean empty;
/* clock skew calculation */
gboolean calculate_skew;
GstClockTime base_time;
GstClockTime base_pcrtime;
GstClockTime base_extrtp;
GstClockTime prev_out_time;
GstClockTime last_pcrtime;
gint64 window[MAX_WINDOW];
guint window_pos;
guint window_size;
gboolean window_filling;
gint64 window_min;
gint64 skew;
gint64 prev_send_diff;
};
struct _MpegTSPacketizer2Class {
GObjectClass object_class;
};
typedef struct
{
GstBuffer *buffer;
gint16 pid;
guint8 payload_unit_start_indicator;
guint8 adaptation_field_control;
guint8 continuity_counter;
guint8 *payload;
guint8 *data_start;
guint8 *data_end;
guint8 *data;
guint8 afc_flags;
guint64 pcr;
guint64 opcr;
guint64 offset;
} MpegTSPacketizerPacket;
typedef struct
{
gboolean complete;
GstBuffer *buffer;
gint16 pid;
guint8 table_id;
guint16 subtable_extension;
guint section_length;
guint8 version_number;
guint8 current_next_indicator;
guint32 crc;
} MpegTSPacketizerSection;
typedef struct
{
guint8 table_id;
/* the spec says sub_table_extension is the fourth and fifth byte of a
* section when the section_syntax_indicator is set to a value of "1". If
* section_syntax_indicator is 0, sub_table_extension will be set to 0 */
guint16 subtable_extension;
guint8 version_number;
guint32 crc;
} MpegTSPacketizerStreamSubtable;
typedef enum {
PACKET_BAD = FALSE,
PACKET_OK = TRUE,
PACKET_NEED_MORE
} MpegTSPacketizerPacketReturn;
GType mpegts_packetizer_get_type(void);
MpegTSPacketizer2 *mpegts_packetizer_new (void);
void mpegts_packetizer_clear (MpegTSPacketizer2 *packetizer);
void mpegts_packetizer_flush (MpegTSPacketizer2 *packetizer);
void mpegts_packetizer_push (MpegTSPacketizer2 *packetizer, GstBuffer *buffer);
gboolean mpegts_packetizer_has_packets (MpegTSPacketizer2 *packetizer);
MpegTSPacketizerPacketReturn mpegts_packetizer_next_packet (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerPacket *packet);
void mpegts_packetizer_clear_packet (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerPacket *packet);
void mpegts_packetizer_remove_stream(MpegTSPacketizer2 *packetizer,
gint16 pid);
gboolean mpegts_packetizer_push_section (MpegTSPacketizer2 *packetzer,
MpegTSPacketizerPacket *packet, MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_pat (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_pmt (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_nit (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_sdt (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_eit (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_tdt (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
guint64 mpegts_packetizer_compute_pcr(const guint8 * data);
G_END_DECLS
#endif /* GST_MPEGTS_PACKETIZER_H */
|
