120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* protocolfile.c: IPTV plugin for the Video Disk Recorder
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*
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* See the README file for copyright information and how to reach the author.
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*
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* $Id: protocolfile.c,v 1.7 2007/09/20 21:45:51 rahrenbe Exp $
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <vdr/device.h>
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#include "common.h"
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#include "config.h"
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#include "protocolfile.h"
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cIptvProtocolFile::cIptvProtocolFile()
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: fileActive(false)
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{
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debug("cIptvProtocolFile::cIptvProtocolFile(): %d/%d packets\n",
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IptvConfig.GetFileBufferSize(), IptvConfig.GetMaxBufferSize());
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streamAddr = strdup("");
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// Allocate receive buffer
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readBuffer = MALLOC(unsigned char, (TS_SIZE * IptvConfig.GetMaxBufferSize()));
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if (!readBuffer)
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error("ERROR: MALLOC() failed in ProtocolFile()");
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}
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cIptvProtocolFile::~cIptvProtocolFile()
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{
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debug("cIptvProtocolFile::~cIptvProtocolFile()\n");
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// Drop open handles
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Close();
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// Free allocated memory
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free(streamAddr);
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free(readBuffer);
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}
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bool cIptvProtocolFile::OpenFile(void)
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{
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debug("cIptvProtocolFile::OpenFile()\n");
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// Check that stream address is valid
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if (!fileActive && !isempty(streamAddr)) {
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fileStream = fopen(streamAddr, "rb");
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if (ferror(fileStream) || !fileStream) {
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char tmp[64];
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error("ERROR: fopen(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return false;
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}
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// Update active flag
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fileActive = true;
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}
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return true;
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}
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void cIptvProtocolFile::CloseFile(void)
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{
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debug("cIptvProtocolFile::CloseFile()\n");
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// Check that file stream is valid
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if (fileActive && !isempty(streamAddr)) {
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fclose(fileStream);
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// Update active flag
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fileActive = false;
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}
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}
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int cIptvProtocolFile::Read(unsigned char* *BufferAddr)
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{
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//debug("cIptvProtocolFile::Read()\n");
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*BufferAddr = readBuffer;
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// Check errors
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if (ferror(fileStream)) {
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debug("Read error\n");
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return -1;
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}
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// Rewind if EOF
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if (feof(fileStream))
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rewind(fileStream);
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// Sleep before reading the file stream to prevent aggressive busy looping
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cCondWait::SleepMs(1);
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// This check is to prevent a race condition where file may be switched off
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// during the sleep and buffers are disposed. Check here that the plugin is
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// still active before accessing the buffers
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if (fileActive)
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return fread(readBuffer, sizeof(unsigned char), (TS_SIZE * IptvConfig.GetFileBufferSize()), fileStream);
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return -1;
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}
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bool cIptvProtocolFile::Open(void)
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{
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debug("cIptvProtocolFile::Open(): streamAddr=%s\n", streamAddr);
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// Open the file stream
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OpenFile();
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return true;
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}
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bool cIptvProtocolFile::Close(void)
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{
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debug("cIptvProtocolFile::Close(): streamAddr=%s\n", streamAddr);
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// Close the file stream
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CloseFile();
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return true;
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}
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bool cIptvProtocolFile::Set(const char* Address, const int Port)
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{
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debug("cIptvProtocolFile::Set(): %s:%d\n", Address, Port);
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if (!isempty(Address)) {
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// Close the file stream
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CloseFile();
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// Update stream address and port
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streamAddr = strcpyrealloc(streamAddr, Address);
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streamPort = Port;
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// Open the file for input
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OpenFile();
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}
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return true;
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}
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