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
|
/*****************************************************************************
* DASHManager.cpp
*****************************************************************************
* Copyright © 2010 - 2011 Klagenfurt University
*
* Created on: Aug 10, 2010
* Authors: Christopher Mueller <christopher.mueller@itec.uni-klu.ac.at>
* Christian Timmerer <christian.timmerer@itec.uni-klu.ac.at>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_fixups.h>
#include <cinttypes>
#include "DASHManager.h"
#include "mpd/ProgramInformation.h"
#include "mpd/IsoffMainParser.h"
#include "xml/DOMParser.h"
#include "xml/Node.h"
#include "../adaptive/SharedResources.hpp"
#include "../adaptive/tools/Helper.h"
#include "../adaptive/http/HTTPConnectionManager.h"
#include <vlc_stream.h>
#include <vlc_demux.h>
#include <vlc_meta.h>
#include <vlc_block.h>
#include "../adaptive/tools/Retrieve.hpp"
#include <algorithm>
#include <ctime>
using namespace dash;
using namespace dash::mpd;
using namespace adaptive::logic;
DASHManager::DASHManager(demux_t *demux_,
SharedResources *res,
MPD *mpd,
AbstractStreamFactory *factory,
AbstractAdaptationLogic::LogicType type) :
PlaylistManager(demux_, res, mpd, factory, type)
{
}
DASHManager::~DASHManager ()
{
}
void DASHManager::scheduleNextUpdate()
{
time_t now = time(nullptr);
vlc_tick_t minbuffer = getMinAheadTime() / 2;
if(playlist->minUpdatePeriod > minbuffer)
minbuffer = playlist->minUpdatePeriod;
if(minbuffer < 5 * CLOCK_FREQ)
minbuffer = 5 * CLOCK_FREQ;
nextPlaylistupdate = now + minbuffer / CLOCK_FREQ;
msg_Dbg(p_demux, "Updated MPD, next update in %" PRId64 "s", (vlc_tick_t) nextPlaylistupdate - now );
}
bool DASHManager::needsUpdate() const
{
if(nextPlaylistupdate && time(nullptr) < nextPlaylistupdate)
return false;
return PlaylistManager::needsUpdate();
}
bool DASHManager::updatePlaylist()
{
/* do update */
if(nextPlaylistupdate)
{
std::string url(p_demux->psz_access);
url.append("://");
url.append(p_demux->psz_location);
block_t *p_block = Retrieve::HTTP(resources, ChunkType::Playlist, url);
if(!p_block)
return false;
stream_t *mpdstream = vlc_stream_MemoryNew(p_demux, p_block->p_buffer, p_block->i_buffer, true);
if(!mpdstream)
{
block_Release(p_block);
return false;
}
xml::DOMParser parser(mpdstream);
if(!parser.parse(true))
{
vlc_stream_Delete(mpdstream);
block_Release(p_block);
return false;
}
IsoffMainParser mpdparser(parser.getRootNode(), VLC_OBJECT(p_demux),
mpdstream, Helper::getDirectoryPath(url).append("/"));
MPD *newmpd = mpdparser.parse();
if(newmpd)
{
playlist->updateWith(newmpd);
delete newmpd;
}
vlc_stream_Delete(mpdstream);
block_Release(p_block);
}
return true;
}
int DASHManager::doControl(int i_query, va_list args)
{
switch (i_query)
{
case DEMUX_GET_META:
{
MPD *mpd = dynamic_cast<MPD *>(playlist);
if(!mpd)
return VLC_EGENERIC;
if(!mpd->programInfo)
break;
vlc_meta_t *p_meta = va_arg (args, vlc_meta_t *);
vlc_meta_t *meta = vlc_meta_New();
if (meta == nullptr)
return VLC_EGENERIC;
if(!mpd->programInfo->getTitle().empty())
vlc_meta_SetTitle(meta, mpd->programInfo->getTitle().c_str());
if(!mpd->programInfo->getSource().empty())
vlc_meta_SetPublisher(meta, mpd->programInfo->getSource().c_str());
if(!mpd->programInfo->getCopyright().empty())
vlc_meta_SetCopyright(meta, mpd->programInfo->getCopyright().c_str());
if(!mpd->programInfo->getMoreInformationUrl().empty())
vlc_meta_SetURL(meta, mpd->programInfo->getMoreInformationUrl().c_str());
vlc_meta_Merge(p_meta, meta);
vlc_meta_Delete(meta);
break;
}
}
return PlaylistManager::doControl(i_query, args);
}
bool DASHManager::isDASH(xml::Node *root)
{
const std::string namespaces[] = {
"urn:mpeg:mpegB:schema:DASH:MPD:DIS2011",
"urn:mpeg:schema:dash:mpd:2011",
"urn:mpeg:DASH:schema:MPD:2011",
"urn:mpeg:mpegB:schema:DASH:MPD:DIS2011",
"urn:mpeg:schema:dash:mpd:2011",
"urn:mpeg:DASH:schema:MPD:2011",
};
if(root->getName() != "MPD")
return false;
std::string ns = root->getAttributeValue("xmlns");
for( size_t i=0; i<ARRAY_SIZE(namespaces); i++ )
{
if ( adaptive::Helper::ifind(ns, namespaces[i]) )
return true;
}
return false;
}
bool DASHManager::mimeMatched(const std::string &mime)
{
return (mime == "application/dash+xml");
}
|
