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
232
233
234
235
236
|
/*
Copyright (C) 2001 Nikolas Zimmermann <wildfox@kde.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; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/*
* How does it work?
* -----------------
*
* First the buffer has to be filled. When it reaches a defined size the outdata
* stream has to start pulling packets. If the buffer reaches a size of zero the
* stream has to stop. If the buffer gets to big the job has to be suspended
* until the buffer is small enough again.
*/
#include <kapplication.h>
#include <kdebug.h>
#include <kio/job.h>
#include <kio/kmimetype.h>
#include <kio/jobclasses.h>
#include <tqtimer.h>
#include <tqdatastream.h>
#include "artsversion.h"
#include "kioinputstream_impl.moc"
using namespace Arts;
const unsigned int TDEIOInputStream_impl::PACKET_COUNT = 10;
TDEIOInputStream_impl::TDEIOInputStream_impl() : m_packetSize(2048)
{
m_job = 0;
m_finished = false;
m_firstBuffer = false;
m_packetBuffer = 16;
m_streamStarted = false;
m_streamSuspended = false;
m_streamPulled = false;
m_size = 0;
}
TDEIOInputStream_impl::~TDEIOInputStream_impl()
{
if(m_job != 0)
m_job->kill();
}
void TDEIOInputStream_impl::streamStart()
{
// prevent kill/reconnect
if (m_streamStarted) {
kdDebug( 400 ) << "not restarting stream!\n";
if (m_job->isSuspended())
m_job->resume();
return;
}
kdDebug( 400 ) << "(re)starting stream\n";
if(m_job != 0)
m_job->kill();
m_job = TDEIO::get(m_url, false, false);
m_job->addMetaData("accept", "audio/x-mp3, video/mpeg, application/ogg");
m_job->addMetaData("UserAgent", TQString::fromLatin1("aRts/") + TQString::fromLatin1(ARTS_VERSION));
TQObject::connect(m_job, TQT_SIGNAL(data(TDEIO::Job *, const TQByteArray &)),
this, TQT_SLOT(slotData(TDEIO::Job *, const TQByteArray &)));
TQObject::connect(m_job, TQT_SIGNAL(result(TDEIO::Job *)),
this, TQT_SLOT(slotResult(TDEIO::Job *)));
TQObject::connect(m_job, TQT_SIGNAL(mimetype(TDEIO::Job *, const TQString &)),
this, TQT_SLOT(slotScanMimeType(TDEIO::Job *, const TQString &)));
TQObject::connect(m_job, TQT_SIGNAL(totalSize( TDEIO::Job *, TDEIO::filesize_t)),
this, TQT_SLOT(slotTotalSize(TDEIO::Job *, TDEIO::filesize_t)));
m_streamStarted = true;
}
void TDEIOInputStream_impl::streamEnd()
{
kdDebug( 400 ) << "streamEnd()\n";
if(m_job != 0)
{
TQObject::disconnect(m_job, TQT_SIGNAL(data(TDEIO::Job *, const TQByteArray &)),
this, TQT_SLOT(slotData(TDEIO::Job *, const TQByteArray &)));
TQObject::disconnect(m_job, TQT_SIGNAL(result(TDEIO::Job *)),
this, TQT_SLOT(slotResult(TDEIO::Job *)));
TQObject::disconnect(m_job, TQT_SIGNAL(mimetype(TDEIO::Job *, const TQString &)),
this, TQT_SLOT(slotScanMimeType(TDEIO::Job *, const TQString &)));
TQObject::disconnect(m_job, TQT_SIGNAL(totalSize( TDEIO::Job *, TDEIO::filesize_t)),
this, TQT_SLOT(slotTotalSize(TDEIO::Job *, TDEIO::filesize_t)));
if ( m_streamPulled )
outdata.endPull();
m_job->kill();
m_job = 0;
}
m_streamStarted = false;
}
bool TDEIOInputStream_impl::openURL(const std::string& url)
{
m_url = KURL(url.c_str());
m_size = 0;
return true;
}
void TDEIOInputStream_impl::slotData(TDEIO::Job *, const TQByteArray &data)
{
if(m_finished)
m_finished = false;
TQDataStream dataStream(m_data, IO_WriteOnly | IO_Append);
dataStream.writeRawBytes(data.data(), data.size());
//kdDebug( 400 ) << "STREAMING: buffersize = " << m_data.size() << " bytes" << endl;
processQueue();
}
void TDEIOInputStream_impl::slotResult(TDEIO::Job *job)
{
// jobs delete themselves after emitting their result
m_finished = true;
m_streamStarted = false;
m_job = 0;
if(job->error()) {
// break out of the event loop in case of
// connection error
emit mimeTypeFound("application/x-zerosize");
job->showErrorDialog();
}
}
void TDEIOInputStream_impl::slotScanMimeType(TDEIO::Job *, const TQString &mimetype)
{
kdDebug( 400 ) << "got mimetype: " << mimetype << endl;
emit mimeTypeFound(mimetype);
}
void TDEIOInputStream_impl::slotTotalSize(TDEIO::Job *, TDEIO::filesize_t size)
{
m_size = size;
}
bool TDEIOInputStream_impl::eof()
{
return (m_finished && m_data.size() == 0);
}
bool TDEIOInputStream_impl::seekOk()
{
return false;
}
long TDEIOInputStream_impl::size()
{
return m_size ? m_size : m_data.size();
}
long TDEIOInputStream_impl::seek(long)
{
return -1;
}
void TDEIOInputStream_impl::processQueue()
{
if(m_job != 0)
{
if(m_data.size() > (m_packetBuffer * m_packetSize * 2) && !m_job->isSuspended())
{
kdDebug( 400 ) << "STREAMING: suspend job" << endl;
m_job->suspend();
}
else if(m_data.size() < (m_packetBuffer * m_packetSize) && m_job->isSuspended())
{
kdDebug( 400 ) << "STREAMING: resume job" << endl;
m_job->resume();
}
}
if (!m_firstBuffer) {
if(m_data.size() < (m_packetBuffer * m_packetSize * 2) ) {
kdDebug( 400 ) << "STREAMING: Buffering in progress... (Needed bytes before it starts to play: " << ((m_packetBuffer * m_packetSize * 2) - m_data.size()) << ")" << endl;
return;
} else {
m_firstBuffer = true;
m_streamPulled = true;
outdata.setPull(PACKET_COUNT, m_packetSize);
}
}
}
void TDEIOInputStream_impl::request_outdata(DataPacket<mcopbyte> *packet)
{
processQueue();
packet->size = std::min(m_packetSize, (unsigned int)m_data.size());
kdDebug( 400 ) << "STREAMING: Filling one DataPacket with " << packet->size << " bytes of the stream!" << endl;
if (!m_finished) {
if( (unsigned)packet->size < m_packetSize || ! m_firstBuffer) {
m_firstBuffer = false;
packet->size = 0;
outdata.endPull();
}
}
if (packet->size > 0)
{
memcpy(packet->contents, m_data.data(), packet->size);
memmove(m_data.data(), m_data.data() + packet->size, m_data.size() - packet->size);
m_data.resize(m_data.size() - packet->size);
}
packet->send();
}
REGISTER_IMPLEMENTATION(TDEIOInputStream_impl);
|
