1 /*
2 * Copyright 2006 BBC and Fluendo S.A.
3 *
4 * This library is licensed under 4 different licenses and you
5 * can choose to use it under the terms of any one of them. The
6 * four licenses are the MPL 1.1, the LGPL, the GPL and the MIT
7 * license.
8 *
9 * MPL:
10 *
11 * The contents of this file are subject to the Mozilla Public License
12 * Version 1.1 (the "License"); you may not use this file except in
13 * compliance with the License. You may obtain a copy of the License at
14 * http://www.mozilla.org/MPL/.
15 *
16 * Software distributed under the License is distributed on an "AS IS"
17 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
18 * License for the specific language governing rights and limitations
19 * under the License.
20 *
21 * LGPL:
22 *
23 * This library is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU Library General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This library is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * Library General Public License for more details.
32 *
33 * You should have received a copy of the GNU Library General Public
34 * License along with this library; if not, write to the
35 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
36 * Boston, MA 02110-1301, USA.
37 *
38 * GPL:
39 *
40 * This program is free software; you can redistribute it and/or modify
41 * it under the terms of the GNU General Public License as published by
42 * the Free Software Foundation; either version 2 of the License, or
43 * (at your option) any later version.
44 *
45 * This program is distributed in the hope that it will be useful,
46 * but WITHOUT ANY WARRANTY; without even the implied warranty of
47 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
48 * GNU General Public License for more details.
49 *
50 * You should have received a copy of the GNU General Public License
51 * along with this program; if not, write to the Free Software
52 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
53 *
54 * MIT:
55 *
56 * Unless otherwise indicated, Source Code is licensed under MIT license.
57 * See further explanation attached in License Statement (distributed in the file
58 * LICENSE).
59 *
60 * Permission is hereby granted, free of charge, to any person obtaining a copy of
61 * this software and associated documentation files (the "Software"), to deal in
62 * the Software without restriction, including without limitation the rights to
63 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
64 * of the Software, and to permit persons to whom the Software is furnished to do
65 * so, subject to the following conditions:
66 *
67 * The above copyright notice and this permission notice shall be included in all
68 * copies or substantial portions of the Software.
69 *
70 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
71 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
72 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
73 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
74 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
75 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
76 * SOFTWARE.
77 *
78 */
79
80 #ifndef __TSMUX_COMMON_H__
81 #define __TSMUX_COMMON_H__
82
83 #include <glib.h>
84 #include <gst/gst.h>
85
86 G_BEGIN_DECLS
87
88 #define TSMUX_SYNC_BYTE 0x47
89 #define TSMUX_PACKET_LENGTH 188
90 #define TSMUX_HEADER_LENGTH 4
91 #define TSMUX_PAYLOAD_LENGTH (TSMUX_PACKET_LENGTH - TSMUX_HEADER_LENGTH)
92
93 #define TSMUX_MIN_ES_DESC_LEN 8
94
95 /* Frequency for PCR representation */
96 #define TSMUX_SYS_CLOCK_FREQ ((gint64) 27000000)
97 /* Frequency for PTS values */
98 #define TSMUX_CLOCK_FREQ (TSMUX_SYS_CLOCK_FREQ / 300)
99
100 #define TSMUX_PACKET_FLAG_NONE (0)
101 #define TSMUX_PACKET_FLAG_ADAPTATION (1 << 0)
102 #define TSMUX_PACKET_FLAG_DISCONT (1 << 1)
103 #define TSMUX_PACKET_FLAG_RANDOM_ACCESS (1 << 2)
104 #define TSMUX_PACKET_FLAG_PRIORITY (1 << 3)
105 #define TSMUX_PACKET_FLAG_WRITE_PCR (1 << 4)
106 #define TSMUX_PACKET_FLAG_WRITE_OPCR (1 << 5)
107 #define TSMUX_PACKET_FLAG_WRITE_SPLICE (1 << 6)
108 #define TSMUX_PACKET_FLAG_WRITE_ADAPT_EXT (1 << 7)
109
110 /* PES stream specific flags */
111 #define TSMUX_PACKET_FLAG_PES_FULL_HEADER (1 << 8)
112 #define TSMUX_PACKET_FLAG_PES_WRITE_PTS (1 << 9)
113 #define TSMUX_PACKET_FLAG_PES_WRITE_PTS_DTS (1 << 10)
114 #define TSMUX_PACKET_FLAG_PES_WRITE_ESCR (1 << 11)
115 #define TSMUX_PACKET_FLAG_PES_EXT_STREAMID (1 << 12)
116 #define TSMUX_PACKET_FLAG_PES_DATA_ALIGNMENT (1 << 13)
117
118 /* PAT interval (1/10th sec) */
119 #define TSMUX_DEFAULT_PAT_INTERVAL (TSMUX_CLOCK_FREQ / 10)
120 /* PMT interval (1/10th sec) */
121 #define TSMUX_DEFAULT_PMT_INTERVAL (TSMUX_CLOCK_FREQ / 10)
122 /* SI interval (1/10th sec) */
123 #define TSMUX_DEFAULT_SI_INTERVAL (TSMUX_CLOCK_FREQ / 10)
124
125 typedef struct TsMuxPacketInfo TsMuxPacketInfo;
126 typedef struct TsMuxProgram TsMuxProgram;
127 typedef struct TsMuxStream TsMuxStream;
128
129 struct TsMuxPacketInfo {
130 guint16 pid;
131 guint32 flags;
132 guint32 pes_header_length;
133
134 gboolean packet_start_unit_indicator;
135
136 /* continuity counter */
137 guint8 packet_count;
138
139 /* payload bytes available
140 * (including PES header if applicable) */
141 guint stream_avail;
142
143 /* optional PCR */
144 guint64 pcr;
145
146 /* following not really actively used */
147
148 guint64 opcr;
149
150 guint8 splice_countdown;
151
152 guint8 private_data_len;
153 guint8 private_data[256];
154 };
155
156 static inline void
tsmux_put16(guint8 ** pos,guint16 val)157 tsmux_put16 (guint8 **pos, guint16 val)
158 {
159 *(*pos)++ = (val >> 8) & 0xff;
160 *(*pos)++ = val & 0xff;
161 }
162
163 static inline void
tsmux_put32(guint8 ** pos,guint32 val)164 tsmux_put32 (guint8 **pos, guint32 val)
165 {
166 *(*pos)++ = (val >> 24) & 0xff;
167 *(*pos)++ = (val >> 16) & 0xff;
168 *(*pos)++ = (val >> 8) & 0xff;
169 *(*pos)++ = val & 0xff;
170 }
171
172 static inline void
tsmux_put_ts(guint8 ** pos,guint8 id,gint64 ts)173 tsmux_put_ts (guint8 **pos, guint8 id, gint64 ts)
174 {
175 /* 1: 4 bit id value | TS [32..30] | marker_bit */
176 *(*pos)++ = ((id << 4) | ((ts >> 29) & 0x0E) | 0x01) & 0xff;
177 /* 2, 3: TS[29..15] | marker_bit */
178 tsmux_put16 (pos, ((ts >> 14) & 0xfffe) | 0x01);
179 /* 4, 5: TS[14..0] | marker_bit */
180 tsmux_put16 (pos, ((ts << 1) & 0xfffe) | 0x01);
181 }
182
183 GST_DEBUG_CATEGORY_EXTERN (mpegtsmux_debug);
184 #define TS_DEBUG GST_DEBUG
185
186 G_END_DECLS
187
188 #endif
189