X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=src%2Fjogshuttle.cpp;h=36ea3cd0fb13dbfa193fe03471c1bdbe814e278c;hb=c3302003093710ee247ad84c0fe2ef3c579d417f;hp=8c9d845f8bd16d1c5fcc649fedc85ab5bda19de0;hpb=bf16decf8d7de356d6bbfda824ac2583d92d2d59;p=kdenlive diff --git a/src/jogshuttle.cpp b/src/jogshuttle.cpp index 8c9d845f..36ea3cd0 100644 --- a/src/jogshuttle.cpp +++ b/src/jogshuttle.cpp @@ -31,6 +31,8 @@ #include #include #include +#include +#include #include #define DELAY 10 @@ -66,7 +68,7 @@ #define JOG_STOP 10020 #define MAX_SHUTTLE_RANGE 7 -void ShuttleThread::init(QObject *parent, QString device) +void ShuttleThread::init(QObject *parent, const QString &device) { m_parent = parent; m_device = device; @@ -84,76 +86,96 @@ bool ShuttleThread::isWorking() void ShuttleThread::run() { - kDebug() << "------- STARTING SHUTTLE: " << m_device; - /* open file descriptor */ - const int fd = KDE_open((char *) m_device.toUtf8().data(), O_RDONLY); - if (fd < 0) { - fprintf(stderr, "Can't open Jog Shuttle FILE DESCRIPTOR\n"); - return; - } + kDebug() << "------- STARTING SHUTTLE: " << m_device; + /* open file descriptor */ + const int fd = KDE_open((char *) m_device.toUtf8().data(), O_RDONLY); + if (fd < 0) { + perror("Can't open Jog Shuttle FILE DESCRIPTOR"); + return; + } - EV ev; - if (ioctl(fd, EVIOCGRAB, 1) < 0) { - fprintf(stderr, "Can't get exclusive access on Jog Shuttle FILE DESCRIPTOR\n"); - close(fd); - return; - } + EV ev; - fd_set readset; - struct timeval timeout; - - int num_warnings = 0; - int result, iof = -1; - - /* enter thread loop */ - while (!stop_me) { - /* reset the read set */ - FD_ZERO(&readset); - FD_SET(fd, &readset); - - /* reinit the timeout structure */ - timeout.tv_sec = 0; - timeout.tv_usec = 300000; /* 300 ms */ - - /* do the select */ - result = select(fd+1, &readset, NULL, NULL, &timeout); - - /* see if there was an error or timeout */ - if (result < 0) { -// perror("select failed"); - } else if (result == 0) { -// puts("TIMEOUT"); - } else { - /* we have input */ - if (FD_ISSET(fd, &readset)) { - /* get fd settings */ - if ((iof = fcntl(fd, F_GETFL, 0)) != -1) { - /* set fd non blocking */ - fcntl(fd, F_SETFL, iof | O_NONBLOCK); - /* read input */ - if (read(fd, &ev, sizeof(ev)) < 0) { - if (num_warnings % 10000 == 0) - /* should not happen cause select called before */ - fprintf(stderr, "Failed to read event from Jog Shuttle FILE DESCRIPTOR (repeated %d times)\n", num_warnings + 1); - num_warnings++; - } + if (ioctl(fd, EVIOCGRAB, 1) < 0) { + fprintf(stderr, "Can't get exclusive access on Jog Shuttle FILE DESCRIPTOR\n"); + close(fd); + return; + } + + fd_set readset; + struct timeval timeout; - /* restore settings */ - if (iof != -1) { - fcntl(fd, F_SETFL, iof); + int num_warnings = 0, readResult = 0; + int result, iof = -1; + + /* get fd settings */ + if ((iof = fcntl(fd, F_GETFL, 0)) != -1) { + /* set fd non blocking */ + fcntl(fd, F_SETFL, iof | O_NONBLOCK); + } else { + fprintf(stderr, "Can't set Jog Shuttle FILE DESCRIPTOR to O_NONBLOCK and stop thread\n"); + return; + } + + /* enter thread loop */ + while (!stop_me) { + /* reset the read set */ + FD_ZERO(&readset); + FD_SET(fd, &readset); + + /* reinit the timeout structure */ + timeout.tv_sec = 0; + timeout.tv_usec = 400000; /* 400 ms */ + + /* do select in blocked mode and wake up after timeout for eval stop_me */ + result = select(fd+1, &readset, NULL, NULL, &timeout); + + /* see if there was an error or timeout else process event */ + if (result < 0 && errno == EINTR) { + /* EINTR event catched. This is not a problem - continue processing */ + kDebug() << strerror(errno) << "\n"; + /* continue processing */ + continue; + } else if (result < 0) { + /* stop thread */ + stop_me = true; + kDebug() << strerror(errno) << "\n"; + } else if (result == 0) { + /* do nothing. reserved for future purposes */ + } else { + /* we have input */ + if (FD_ISSET(fd, &readset)) { + /* read input */ + readResult = read(fd, &ev, sizeof(ev)); + if (readResult < 0) { + if (num_warnings % 10000 == 0) { + /* if device is not available anymore - dead or disconnected */ + fprintf(stderr, "Failed to read event from Jog Shuttle FILE DESCRIPTOR (repeated %d times)\n", num_warnings + 1); + } + /* exit if device is not available or the error occurs to long */ + if (errno == ENODEV) { + perror("Failed to read from Jog Shuttle FILE DESCRIPTOR. Stop thread"); + /* stop thread */ + stop_me = true; + } else if (num_warnings > 1000000) { + perror("Failed to read from Jog Shuttle FILE DESCRIPTOR. Limit reached. Stop thread"); + /* stop thread */ + stop_me = true; } + num_warnings++; + } else if (readResult == sizeof(ev)) { /* process event */ handle_event(ev); - } else { - fprintf(stderr, "Can't set Jog Shuttle FILE DESCRIPTOR to O_NONBLOCK\n"); - stop_me = true; - } - } - } - } + } else { + fprintf(stderr, "Read nr of bytes != sizeof(ev)\n"); + } + } + } + } - /* close the handle and return thread */ - close(fd); +// kDebug() << "Close thread" << "\n"; + /* close the handle and return thread */ + close(fd); } void ShuttleThread::handle_event(EV ev) @@ -183,7 +205,7 @@ void ShuttleThread::key(unsigned short code, unsigned int value) if (code > 16) return; - kDebug() << "Button PRESSED: " << code; + //kDebug() << "Button PRESSED: " << code; QApplication::postEvent(m_parent, new QEvent((QEvent::Type)(KEY_EVENT_OFFSET + code))); } @@ -243,7 +265,7 @@ void ShuttleThread::jog(unsigned int value) } -JogShuttle::JogShuttle(QString device, QObject *parent) : +JogShuttle::JogShuttle(const QString &device, QObject *parent) : QObject(parent) { initDevice(device); @@ -254,7 +276,7 @@ JogShuttle::~JogShuttle() stopDevice(); } -void JogShuttle::initDevice(QString device) +void JogShuttle::initDevice(const QString &device) { if (m_shuttleProcess.isRunning()) { if (device == m_shuttleProcess.m_device) return; @@ -267,7 +289,7 @@ void JogShuttle::initDevice(QString device) void JogShuttle::stopDevice() { if (m_shuttleProcess.isRunning()) { - /* the read fd is in blocking mode => stop_me is broken at the moment */ + /* tell thread to stop */ m_shuttleProcess.stop_me = true; m_shuttleProcess.exit(); /* give the thread some time (ms) to shutdown */ @@ -310,3 +332,5 @@ void JogShuttle::customEvent(QEvent* e) // #include "jogshuttle.moc" + +#include "jogshuttle.moc"