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
237
238
239
|
/*
* $Id: filter.c,v 1.10 2007/04/23 12:52:28 schmirl Exp $
*/
#include "client/filter.h"
#include "client/socket.h"
#include "tools/select.h"
#include "common.h"
#include <vdr/device.h>
#if VDRVERSNUM >= 10300
// --- cStreamdevFilter ------------------------------------------------------
class cStreamdevFilter: public cListObject {
private:
uchar m_Buffer[4096];
int m_Used;
int m_Pipe[2];
u_short m_Pid;
u_char m_Tid;
u_char m_Mask;
public:
cStreamdevFilter(u_short Pid, u_char Tid, u_char Mask);
virtual ~cStreamdevFilter();
bool Matches(u_short Pid, u_char Tid);
bool PutSection(const uchar *Data, int Length);
int ReadPipe(void) const { return m_Pipe[0]; }
bool IsClosed(void);
void Reset(void);
u_short Pid(void) const { return m_Pid; }
u_char Tid(void) const { return m_Tid; }
u_char Mask(void) const { return m_Mask; }
};
inline bool cStreamdevFilter::Matches(u_short Pid, u_char Tid) {
return m_Pid == Pid && m_Tid == (Tid & m_Mask);
}
cStreamdevFilter::cStreamdevFilter(u_short Pid, u_char Tid, u_char Mask) {
m_Used = 0;
m_Pid = Pid;
m_Tid = Tid;
m_Mask = Mask;
m_Pipe[0] = m_Pipe[1] = -1;
#ifdef SOCK_SEQPACKET
// SOCK_SEQPACKET (since kernel 2.6.4)
if (socketpair(AF_UNIX, SOCK_SEQPACKET, 0, m_Pipe) != 0) {
esyslog("streamdev-client: socketpair(SOCK_SEQPACKET) failed: %m, trying SOCK_DGRAM");
}
#endif
if (m_Pipe[0] < 0 && socketpair(AF_UNIX, SOCK_DGRAM, 0, m_Pipe) != 0) {
esyslog("streamdev-client: couldn't open section filter socket: %m");
}
else if(fcntl(m_Pipe[0], F_SETFL, O_NONBLOCK) != 0 ||
fcntl(m_Pipe[1], F_SETFL, O_NONBLOCK) != 0) {
esyslog("streamdev-client: couldn't set section filter socket to non-blocking mode: %m");
}
}
cStreamdevFilter::~cStreamdevFilter() {
Dprintf("~cStreamdevFilter %p\n", this);
// ownership of handle m_Pipe[0] has been transferred to VDR section handler
//if (m_Pipe[0] >= 0)
// close(m_Pipe[0]);
if (m_Pipe[1] >= 0)
close(m_Pipe[1]);
}
bool cStreamdevFilter::PutSection(const uchar *Data, int Length) {
if (m_Used + Length >= (int)sizeof(m_Buffer)) {
esyslog("ERROR: Streamdev: Section handler buffer overflow (%d bytes lost)",
Length);
Reset();
return true;
}
memcpy(m_Buffer + m_Used, Data, Length);
m_Used += Length;
if (m_Used > 3) {
int length = (((m_Buffer[1] & 0x0F) << 8) | m_Buffer[2]) + 3;
if (m_Used == length) {
m_Used = 0;
if (write(m_Pipe[1], m_Buffer, length) < 0) {
if(errno == EAGAIN || errno == EWOULDBLOCK)
dsyslog("cStreamdevFilter::PutSection socket overflow, "
"Pid %4d Tid %3d", m_Pid, m_Tid);
else
return false;
}
}
if (m_Used > length) {
dsyslog("cStreamdevFilter::PutSection: m_Used > length ! Pid %2d, Tid%2d "
"(len %3d, got %d/%d)", m_Pid, m_Tid, Length, m_Used, length);
if(Length < TS_SIZE-5) {
// TS packet not full -> this must be last TS packet of section data -> safe to reset now
Reset();
}
}
}
return true;
}
void cStreamdevFilter::Reset(void) {
if(m_Used)
dsyslog("cStreamdevFilter::Reset skipping %d bytes", m_Used);
m_Used = 0;
}
bool cStreamdevFilter::IsClosed(void) {
char m_Buffer[3] = {0,0,0}; /* tid 0, 0 bytes */
// Test if pipe/socket has been closed by writing empty section
if (write(m_Pipe[1], m_Buffer, 3) < 0 &&
errno != EAGAIN &&
errno != EWOULDBLOCK) {
if (errno != ECONNREFUSED &&
errno != ECONNRESET &&
errno != EPIPE)
esyslog("cStreamdevFilter::IsClosed failed: %m");
return true;
}
return false;
}
// --- cStreamdevFilters -----------------------------------------------------
cStreamdevFilters::cStreamdevFilters(void):
cThread("streamdev-client: sections assembler") {
m_Active = false;
m_RingBuffer = new cRingBufferLinear(MEGABYTE(1), TS_SIZE * 2, true);
Start();
}
cStreamdevFilters::~cStreamdevFilters() {
if (m_Active) {
m_Active = false;
Cancel(3);
}
delete m_RingBuffer;
}
int cStreamdevFilters::OpenFilter(u_short Pid, u_char Tid, u_char Mask) {
CarbageCollect();
cStreamdevFilter *f = new cStreamdevFilter(Pid, Tid, Mask);
int fh = f->ReadPipe();
Lock();
Add(f);
Unlock();
return fh;
}
void cStreamdevFilters::CarbageCollect(void) {
LOCK_THREAD;
for (cStreamdevFilter *fi = First(); fi;) {
if (fi->IsClosed()) {
if (errno == ECONNREFUSED ||
errno == ECONNRESET ||
errno == EPIPE) {
ClientSocket.SetFilter(fi->Pid(), fi->Tid(), fi->Mask(), false);
Dprintf("cStreamdevFilters::CarbageCollector: filter closed: Pid %4d, Tid %3d, Mask %2x (%d filters left)",
(int)fi->Pid(), (int)fi->Tid(), fi->Mask(), Count()-1);
cStreamdevFilter *next = Prev(fi);
Del(fi);
fi = next ? Next(next) : First();
} else {
esyslog("cStreamdevFilters::CarbageCollector() error: "
"Pid %4d, Tid %3d, Mask %2x (%d filters left) failed",
(int)fi->Pid(), (int)fi->Tid(), fi->Mask(), Count()-1);
LOG_ERROR;
fi = Next(fi);
}
} else {
fi = Next(fi);
}
}
}
cStreamdevFilter *cStreamdevFilters::Matches(u_short Pid, u_char Tid) {
for (cStreamdevFilter *f = First(); f; f = Next(f)) {
if (f->Matches(Pid, Tid))
return f;
}
return NULL;
}
void cStreamdevFilters::Put(const uchar *Data) {
int p = m_RingBuffer->Put(Data, TS_SIZE);
if (p != TS_SIZE)
m_RingBuffer->ReportOverflow(TS_SIZE - p);
}
void cStreamdevFilters::Action(void) {
m_Active = true;
while (m_Active) {
int recvd;
const uchar *block = m_RingBuffer->Get(recvd);
if (block && recvd > 0) {
cStreamdevFilter *f;
u_short pid = (((u_short)block[1] & PID_MASK_HI) << 8) | block[2];
u_char tid = block[3];
if ((f = Matches(pid, tid)) != NULL) {
int len = block[4];
if (!f->PutSection(block + 5, len)) {
if (errno != EPIPE) {
esyslog("streamdev-client: couldn't send section packet: %m");
Dprintf("FATAL ERROR: %m\n");
}
ClientSocket.SetFilter(f->Pid(), f->Tid(), f->Mask(), false);
Del(f);
}
}
m_RingBuffer->Del(TS_SIZE);
} else
usleep(1);
}
}
#endif // VDRVERSNUM >= 10300
|
