forked from kodi-pvr/pvr.mythtv
/
mythprotoevent.cpp
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/
mythprotoevent.cpp
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/*
* Copyright (C) 2014 Jean-Luc Barriere
*
* 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 2, 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; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
* http://www.gnu.org/copyleft/gpl.html
*
*/
#include "mythprotoevent.h"
#include "../private/debug.h"
#include "../private/socket.h"
#include "../private/os/threads/mutex.h"
#include "../private/builtin.h"
#include <limits>
#include <cstdio>
#include <vector>
using namespace Myth;
void __tokenize(const std::string& str, const char *delimiters, std::vector<std::string>& tokens, bool trimnull = false)
{
std::string::size_type pa = 0, pb = 0;
unsigned n = 0;
// Counter n will break infinite loop. Max count is 255 tokens
while ((pb = str.find_first_of(delimiters, pb)) != std::string::npos && ++n < 255)
{
tokens.push_back(str.substr(pa, pb - pa));
do
{
pa = ++pb;
}
while (trimnull && str.find_first_of(delimiters, pb) == pb);
}
tokens.push_back(str.substr(pa));
}
///////////////////////////////////////////////////////////////////////////////
////
//// Protocol connection to listen event
////
ProtoEvent::ProtoEvent(const std::string& server, unsigned port)
: ProtoBase(server, port)
{
}
bool ProtoEvent::Open()
{
bool ok = false;
if (!OpenConnection(PROTO_EVENT_RCVBUF))
return false;
if (m_protoVersion >= 75)
ok = Announce75();
if (ok)
return true;
Close();
return false;
}
void ProtoEvent::Close()
{
ProtoBase::Close();
// Clean hanging and disable retry
m_tainted = m_hang = false;
}
bool ProtoEvent::Announce75()
{
OS::CLockGuard lock(*m_mutex);
std::string cmd("ANN Monitor ");
cmd.append(m_socket->GetMyHostName()).append(" 1");
if (!SendCommand(cmd.c_str()))
return false;
std::string field;
if (!ReadField(field) || !IsMessageOK(field))
goto out;
return true;
out:
FlushMessage();
return false;
}
SignalStatusPtr ProtoEvent::RcvSignalStatus()
{
SignalStatusPtr signal(new SignalStatus()); // Using default constructor
std::string field;
while (ReadField(field))
{
std::vector<std::string> tokens;
// Tokenize the content
__tokenize(field, " ", tokens, false);
// Fill my signal
if (tokens.size() > 1)
{
int64_t tmpi;
if (tokens[0] == "slock")
signal->lock = (tokens[1] == "1" ? true : false);
else if (tokens[0] == "signal")
signal->signal = (0 == string_to_int64(tokens[1].c_str(), &tmpi) ? (int)tmpi : 0);
else if (tokens[0] == "snr")
signal->snr = (0 == string_to_int64(tokens[1].c_str(), &tmpi) ? (int)tmpi : 0);
else if (tokens[0] == "ber")
signal->ber = (0 == string_to_int64(tokens[1].c_str(), &tmpi) ? (long)tmpi : 0);
else if (tokens[0] == "ucb")
signal->ucb = (0 == string_to_int64(tokens[1].c_str(), &tmpi) ? (long)tmpi : 0);
}
}
return signal;
}
int ProtoEvent::RcvBackendMessage(unsigned timeout, EventMessage **msg)
{
OS::CLockGuard lock(*m_mutex);
struct timeval tv;
tv.tv_sec = timeout;
tv.tv_usec = 0;
int r = m_socket->Listen(&tv);
if (r > 0)
{
std::string field;
EventMessage *pmsg = new EventMessage();
pmsg->event = EVENT_UNKNOWN;
pmsg->subject.clear();
pmsg->program.reset();
pmsg->signal.reset();
if (RcvMessageLength() && ReadField(field) && field == "BACKEND_MESSAGE")
{
unsigned n = 0;
ReadField(field);
// Tokenize the subject
__tokenize(field, " ", pmsg->subject, false);
n = (unsigned)pmsg->subject.size();
DBG(DBG_DEBUG, "%s: %s (%u)\n", __FUNCTION__, field.c_str(), n);
if (pmsg->subject[0] == "UPDATE_FILE_SIZE")
pmsg->event = EVENT_UPDATE_FILE_SIZE;
else if (pmsg->subject[0] == "DONE_RECORDING")
pmsg->event = EVENT_DONE_RECORDING;
else if (pmsg->subject[0] == "QUIT_LIVETV")
pmsg->event = EVENT_QUIT_LIVETV;
else if (pmsg->subject[0] == "LIVETV_WATCH")
pmsg->event = EVENT_LIVETV_WATCH;
else if (pmsg->subject[0] == "LIVETV_CHAIN")
pmsg->event = EVENT_LIVETV_CHAIN;
else if (pmsg->subject[0] == "SIGNAL")
{
pmsg->event = EVENT_SIGNAL;
pmsg->signal = RcvSignalStatus();
}
else if (pmsg->subject[0] == "RECORDING_LIST_CHANGE")
{
pmsg->event = EVENT_RECORDING_LIST_CHANGE;
if (n > 1 && pmsg->subject[1] == "UPDATE")
pmsg->program = RcvProgramInfo();
}
else if (pmsg->subject[0] == "SCHEDULE_CHANGE")
pmsg->event = EVENT_SCHEDULE_CHANGE;
else if (pmsg->subject[0] == "ASK_RECORDING")
{
pmsg->event = EVENT_ASK_RECORDING;
pmsg->program = RcvProgramInfo();
}
else if (pmsg->subject[0] == "CLEAR_SETTINGS_CACHE")
pmsg->event = EVENT_CLEAR_SETTINGS_CACHE;
else if (pmsg->subject[0] == "GENERATED_PIXMAP")
pmsg->event = EVENT_GENERATED_PIXMAP;
else if (pmsg->subject[0] == "SYSTEM_EVENT")
pmsg->event = EVENT_SYSTEM_EVENT;
else
pmsg->event = EVENT_UNKNOWN;
}
FlushMessage();
*msg = pmsg;
return (m_hang ? -(ENOTCONN) : 1);
}
else if (r < 0)
return r;
return ((ProtoBase::IsOpen() && !m_hang) ? 0 : -(ENOTCONN));
}