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vdr-plugin-iptv/protocolfile.c
2007-10-07 22:54:09 +00:00

128 lines
3.2 KiB
C

/*
* protocolfile.c: IPTV plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
* $Id: protocolfile.c,v 1.10 2007/10/07 22:54:09 rahrenbe Exp $
*/
#include <fcntl.h>
#include <unistd.h>
#include <vdr/device.h>
#include "common.h"
#include "config.h"
#include "protocolfile.h"
cIptvProtocolFile::cIptvProtocolFile()
: readBufferLen(TS_SIZE * IptvConfig.GetReadBufferTsCount()),
isActive(false)
{
debug("cIptvProtocolFile::cIptvProtocolFile()\n");
streamAddr = strdup("");
// Allocate receive buffer
readBuffer = MALLOC(unsigned char, readBufferLen);
if (!readBuffer)
error("ERROR: MALLOC() failed in ProtocolFile()");
}
cIptvProtocolFile::~cIptvProtocolFile()
{
debug("cIptvProtocolFile::~cIptvProtocolFile()\n");
// Drop open handles
Close();
// Free allocated memory
free(streamAddr);
free(readBuffer);
}
bool cIptvProtocolFile::OpenFile(void)
{
debug("cIptvProtocolFile::OpenFile()\n");
// Check that stream address is valid
if (!isActive && !isempty(streamAddr)) {
fileStream = fopen(streamAddr, "rb");
if (ferror(fileStream) || !fileStream) {
char tmp[64];
error("ERROR: fopen(): %s", strerror_r(errno, tmp, sizeof(tmp)));
return false;
}
// Update active flag
isActive = true;
}
return true;
}
void cIptvProtocolFile::CloseFile(void)
{
debug("cIptvProtocolFile::CloseFile()\n");
// Check that file stream is valid
if (isActive && !isempty(streamAddr)) {
fclose(fileStream);
// Update active flag
isActive = false;
}
}
int cIptvProtocolFile::Read(unsigned char* *BufferAddr)
{
//debug("cIptvProtocolFile::Read()\n");
*BufferAddr = readBuffer;
// Check errors
if (ferror(fileStream)) {
debug("Read error\n");
return -1;
}
// Rewind if EOF
if (feof(fileStream))
rewind(fileStream);
// Sleep before reading the file stream to prevent aggressive busy looping
// and prevent transfer ringbuffer overflows
if (streamPort)
cCondWait::SleepMs(streamPort);
// This check is to prevent a race condition where file may be switched off
// during the sleep and buffers are disposed. Check here that the plugin is
// still active before accessing the buffers
if (isActive)
return fread(readBuffer, sizeof(unsigned char), readBufferLen, fileStream);
return -1;
}
bool cIptvProtocolFile::Open(void)
{
debug("cIptvProtocolFile::Open(): streamAddr=%s\n", streamAddr);
// Open the file stream
OpenFile();
return true;
}
bool cIptvProtocolFile::Close(void)
{
debug("cIptvProtocolFile::Close(): streamAddr=%s\n", streamAddr);
// Close the file stream
CloseFile();
return true;
}
bool cIptvProtocolFile::Set(const char* Address, const int Port)
{
debug("cIptvProtocolFile::Set(): %s:%d\n", Address, Port);
if (!isempty(Address)) {
// Close the file stream
CloseFile();
// Update stream address and port
streamAddr = strcpyrealloc(streamAddr, Address);
streamPort = Port;
// Open the file for input
OpenFile();
}
return true;
}
cString cIptvProtocolFile::GetInformation(void)
{
//debug("cIptvProtocolFile::GetInformation()");
return cString::sprintf("file://%s:%d", streamAddr, streamPort);
}