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/*
* download.c: Web video plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id$
*/
#include <errno.h>
#include <sys/select.h>
#include <unistd.h>
#include <fcntl.h>
#include <vdr/tools.h>
#include "download.h"
#include "common.h"
// --- cWebviThread --------------------------------------------------------
cWebviThread::cWebviThread() {
int pipefd[2];
if (pipe(pipefd) == -1)
LOG_ERROR_STR("new request pipe");
newreqread = pipefd[0];
newreqwrite = pipefd[1];
//fcntl(newreqread, F_SETFL, O_NONBLOCK);
//fcntl(newreqwrite, F_SETFL, O_NONBLOCK);
webvi = webvi_initialize_context();
}
cWebviThread::~cWebviThread() {
int numactive = activeRequestList.Size();
for (int i=0; i<activeRequestList.Size(); i++)
delete activeRequestList[i];
activeRequestList.Clear();
for (int i=0; i<finishedRequestList.Size(); i++) {
delete finishedRequestList[i];
}
finishedRequestList.Clear();
webvi_cleanup_context(webvi);
if (numactive > 0) {
esyslog("%d requests failed to complete", numactive);
}
}
cWebviThread &cWebviThread::Instance() {
static cWebviThread instance;
return instance;
}
void cWebviThread::SetTemplatePath(const char *path) {
if (webvi != 0 && path)
webvi_set_config(webvi, WEBVI_CONFIG_TEMPLATE_PATH, path);
}
void cWebviThread::MoveToFinishedList(cMenuRequest *req) {
// Move the request from the activeList to finishedList.
requestMutex.Lock();
for (int i=0; i<activeRequestList.Size(); i++) {
if (activeRequestList[i] == req) {
activeRequestList.Remove(i);
break;
}
}
finishedRequestList.Append(req);
requestMutex.Unlock();
}
void cWebviThread::ActivateNewRequest() {
// Move requests from newRequestList to activeRequestList and start
// them.
requestMutex.Lock();
for (int i=0; i<newRequestList.Size(); i++) {
cMenuRequest *req = newRequestList[i];
if (req->IsAborted()) {
// The request has been aborted even before we got a chance to
// start it.
MoveToFinishedList(req);
} else {
debug("starting request %d", req->GetID());
if (!req->Start(webvi)) {
error("Request failed to start");
req->RequestDone(-1, "Request failed to start");
MoveToFinishedList(req);
} else {
activeRequestList.Append(req);
}
}
}
newRequestList.Clear();
requestMutex.Unlock();
}
void cWebviThread::StopFinishedRequests() {
// Check if some requests have finished, and move them to
// finishedRequestList.
int msg_remaining;
WebviMsg *donemsg;
cMenuRequest *req;
do {
donemsg = webvi_get_message(webvi, &msg_remaining);
if (donemsg && donemsg->msg == WEBVIMSG_DONE) {
requestMutex.Lock();
req = activeRequestList.FindByHandle(donemsg->handle);
if (req) {
debug("Finished request %d", req->GetID());
req->RequestDone(donemsg->status_code, donemsg->data);
MoveToFinishedList(req);
}
requestMutex.Unlock();
}
} while (msg_remaining > 0);
}
void cWebviThread::Stop() {
// The thread may be sleeping, wake it up first.
TEMP_FAILURE_RETRY(write(newreqwrite, "S", 1));
Cancel(5);
}
void cWebviThread::Action(void) {
fd_set readfds, writefds, excfds;
int maxfd;
struct timeval timeout;
long running_handles;
bool check_done = false;
if (webvi == 0) {
error("Failed to get libwebvi context");
return;
}
while (Running()) {
FD_ZERO(&readfds);
FD_ZERO(&writefds);
FD_ZERO(&excfds);
webvi_fdset(webvi, &readfds, &writefds, &excfds, &maxfd);
FD_SET(newreqread, &readfds);
if (newreqread > maxfd)
maxfd = newreqread;
timeout.tv_sec = 5;
timeout.tv_usec = 0;
int s = TEMP_FAILURE_RETRY(select(maxfd+1, &readfds, &writefds, NULL,
&timeout));
if (s == -1) {
// select error
LOG_ERROR_STR("select() error in webvideo downloader thread:");
Cancel(-1);
} else if (s == 0) {
// timeout
webvi_perform(webvi, 0, WEBVI_SELECT_TIMEOUT, &running_handles);
check_done = true;
} else {
for (int fd=0; fd<=maxfd; fd++) {
if (FD_ISSET(fd, &readfds)) {
if (fd == newreqread) {
char tmpbuf[8];
int n = read(fd, tmpbuf, 8);
if (n > 0 && memchr(tmpbuf, 'S', n))
Cancel(-1);
ActivateNewRequest();
} else {
webvi_perform(webvi, fd, WEBVI_SELECT_READ, &running_handles);
check_done = true;
}
}
if (FD_ISSET(fd, &writefds))
webvi_perform(webvi, fd, WEBVI_SELECT_WRITE, &running_handles);
if (FD_ISSET(fd, &excfds))
webvi_perform(webvi, fd, WEBVI_SELECT_EXCEPTION, &running_handles);
}
}
if (check_done) {
StopFinishedRequests();
check_done = false;
}
}
}
void cWebviThread::AddRequest(cMenuRequest *req) {
requestMutex.Lock();
newRequestList.Append(req);
requestMutex.Unlock();
int s = TEMP_FAILURE_RETRY(write(newreqwrite, "*", 1));
if (s == -1)
LOG_ERROR_STR("Failed to signal new webvideo request");
}
cMenuRequest *cWebviThread::GetFinishedRequest() {
cMenuRequest *res = NULL;
requestMutex.Lock();
if (finishedRequestList.Size() > 0) {
res = finishedRequestList[finishedRequestList.Size()-1];
finishedRequestList.Remove(finishedRequestList.Size()-1);
}
requestMutex.Unlock();
return res;
}
int cWebviThread::GetUnfinishedCount() {
if (!Running())
return 0;
else
return activeRequestList.Size();
}
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