118 lines
2.9 KiB
C
118 lines
2.9 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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*/
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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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: fileDelay(0),
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fileStream(NULL),
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isActive(false)
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{
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debug("cIptvProtocolFile::cIptvProtocolFile()\n");
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fileLocation = strdup("");
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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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cIptvProtocolFile::Close();
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// Free allocated memory
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free(fileLocation);
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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 (!isActive && !isempty(fileLocation)) {
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fileStream = fopen(fileLocation, "rb");
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ERROR_IF_RET(!fileStream || ferror(fileStream), "fopen()", return false);
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// Update active flag
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isActive = 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 (isActive && !isempty(fileLocation)) {
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fclose(fileStream);
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// Update active flag
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isActive = false;
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}
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}
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int cIptvProtocolFile::Read(unsigned char* BufferAddr, unsigned int BufferLen)
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{
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//debug("cIptvProtocolFile::Read()\n");
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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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// and prevent transfer ringbuffer overflows
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if (fileDelay)
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cCondWait::SleepMs(fileDelay);
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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 (isActive)
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return (int)fread(BufferAddr, sizeof(unsigned char), BufferLen, 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()\n");
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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()\n");
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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* Location, const int Parameter, const int Index)
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{
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debug("cIptvProtocolFile::Set(): Location=%s Parameter=%d Index=%d\n", Location, Parameter, Index);
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if (!isempty(Location)) {
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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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fileLocation = strcpyrealloc(fileLocation, Location);
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fileDelay = Parameter;
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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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cString cIptvProtocolFile::GetInformation(void)
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{
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//debug("cIptvProtocolFile::GetInformation()");
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return cString::sprintf("file://%s:%d", fileLocation, fileDelay);
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}
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