forked from odie5533/Python-RTSP
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathrmff.py
231 lines (199 loc) · 7.56 KB
/
rmff.py
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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
# Copyright (C) 2008 David Bern
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
#
#
# Mostly taken from MPlayer's rmff.c
import struct
class rmff_fileheader_t:
object_id = '.RMF'
size = 18
object_version = 0
file_version = 0
def getSize(self):
return self.size
def __init__(self, num_headers):
self.num_headers = num_headers
def dump(self):
d = []
d.append(self.object_id)
d.append(struct.pack('!I', self.size))
d.append(struct.pack('!H', self.object_version))
d.append(struct.pack('!I', self.file_version))
d.append(struct.pack('!I', self.num_headers))
return ''.join(d)
def __str__(self):
return self.dump()
class rmff_prop_t:
object_id = 'PROP'
size = 50
object_version = 0
def getSize(self):
return self.size
def __init__(self, max_bit_rate, avg_bit_rate, max_packet_size,
avg_packet_size, num_packets, duration, preroll, index_offset,
data_offset, num_streams, flags):
self.max_bit_rate = max_bit_rate
self.avg_bit_rate = avg_bit_rate
self.max_packet_size = max_packet_size
self.avg_packet_size = avg_packet_size
self.num_packets = num_packets
self.duration = duration
self.preroll = preroll
self.index_offset = index_offset
self.data_offset = data_offset
self.num_streams = num_streams
self.flags = flags
def dump(self):
d = []
d.append(self.object_id)
d.append(struct.pack('!I', self.size))
d.append(struct.pack('!H', self.object_version))
d.append(struct.pack('!I', self.max_bit_rate))
d.append(struct.pack('!I', self.avg_bit_rate))
d.append(struct.pack('!I', self.max_packet_size))
d.append(struct.pack('!I', self.avg_packet_size))
d.append(struct.pack('!I', self.num_packets))
d.append(struct.pack('!I', self.duration))
d.append(struct.pack('!I', self.preroll))
d.append(struct.pack('!I', self.index_offset))
d.append(struct.pack('!I', self.data_offset))
d.append(struct.pack('!H', self.num_streams))
d.append(struct.pack('!H', self.flags))
return ''.join(d)
def __str__(self):
return self.dump()
class rmff_mdpr_t:
object_id = 'MDPR'
object_version = 0
def __init__(self, stream_number, max_bit_rate, avg_bit_rate,
max_packet_size, avg_packet_size, start_time, preroll,
duration, stream_name, mime_type, type_specific_data):
self.stream_number = stream_number
self.max_bit_rate = max_bit_rate
self.avg_bit_rate = avg_bit_rate
self.max_packet_size = max_packet_size
self.avg_packet_size = avg_packet_size
self.start_time = start_time
self.preroll = preroll
self.duration = duration
self.stream_name = stream_name
self.mime_type = mime_type
self.type_specific_data = type_specific_data
def getSize(self):
size = 46
size += len(self.stream_name)
size += len(self.mime_type)
size += len(self.type_specific_data)
return size
def dump(self):
d = []
d.append(self.object_id)
d.append(struct.pack('!I', self.getSize()))
d.append(struct.pack('!H', self.object_version))
d.append(struct.pack('!H', self.stream_number))
d.append(struct.pack('!I', self.max_bit_rate))
d.append(struct.pack('!I', self.avg_bit_rate))
d.append(struct.pack('!I', self.max_packet_size))
d.append(struct.pack('!I', self.avg_packet_size))
d.append(struct.pack('!I', self.start_time))
d.append(struct.pack('!I', self.preroll))
d.append(struct.pack('!I', self.duration))
d.append(struct.pack('B', len(self.stream_name)))
d.append(self.stream_name)
d.append(struct.pack('B', len(self.mime_type)))
d.append(self.mime_type)
d.append(struct.pack('!I', len(self.type_specific_data)))
d.append(self.type_specific_data)
return ''.join(d)
def __str__(self):
return self.dump()
class rmff_cont_t:
object_id = 'CONT'
object_version = 0
def __init__(self, title, author, copyright, comment):
self.title = title
self.author = author
self.copyright = copyright
self.comment = comment
def getSize(self):
return len(self.title) + len(self.author) + len(self.copyright) + len(self.comment) + 18
def dump(self):
d = []
d.append(self.object_id)
d.append(struct.pack('!I', self.getSize()))
d.append(struct.pack('!H', self.object_version))
for field in [self.title, self.author, self.copyright, self.comment]:
d.append(struct.pack('!H', len(field)))
d.append(field)
return ''.join(d)
def __str__(self):
return self.dump()
class rmff_data_t:
object_id = 'DATA'
size = 18
object_version = 0
def getSize(self):
return self.size
def __init__(self, num_packets, next_data_header):
self.num_packets = num_packets
self.next_data_header = next_data_header
def dump(self):
d = []
d.append(self.object_id)
d.append(struct.pack('!I', self.size))
d.append(struct.pack('!H', self.object_version))
d.append(struct.pack('!I', self.num_packets))
d.append(struct.pack('!I', self.next_data_header))
return ''.join(d)
def __str__(self):
return self.dump()
class rmff_header_t:
def __init__(self):
self.fileheader = None
self.prop = None
self.streams = []
self.cont = None
self.data = None
def dump(self):
# Recomputes the data offset
self.prop.data_offset = self.fileheader.getSize() + self.prop.getSize() + self.cont.getSize() + sum(s.getSize() for s in self.streams)
d = []
d.append(self.fileheader.dump())
d.append(self.prop.dump())
d.append(self.cont.dump())
for s in self.streams:
d.append(s.dump())
d.append(self.data.dump())
return ''.join(d)
class rmff_pheader_t:
""" The contents of this class get inserted
between RDT data in the output file """
object_version = 0
length = None
stream_number = 0
timestamp = None
reserved = 0
flags = 0
def dump(self):
d = []
d.append(struct.pack('!H', self.object_version))
d.append(struct.pack('!H', self.length))
d.append(struct.pack('!H', self.stream_number))
d.append(struct.pack('!I', self.timestamp))
d.append(struct.pack('B', self.reserved))
d.append(struct.pack('B', self.flags))
return ''.join(d)
def __str__(self):
return self.dump()