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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* ShowLoader.cpp
* A class that reads OLA show files
* Copyright (C) 2011 Simon Newton
*
* The data file is in the form:
* universe-number channel1,channel2,channel3
* delay-in-ms
* universe-number channel1,channel2,channel3
*/
#include <errno.h>
#include <string.h>
#include <ola/DmxBuffer.h>
#include <ola/Logging.h>
#include <ola/StringUtils.h>
#include <fstream>
#include <ios>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include "examples/ShowLoader.h"
using std::vector;
using std::string;
using ola::DmxBuffer;
const char ShowLoader::OLA_SHOW_HEADER[] = "OLA Show";
ShowLoader::ShowLoader(const string &filename)
: m_filename(filename),
m_line(0) {
}
ShowLoader::~ShowLoader() {
if (m_show_file.is_open()) {
m_show_file.close();
}
}
/**
* Load the show file.
* @returns true if we could open the file, false otherwise.
*/
bool ShowLoader::Load() {
m_show_file.open(m_filename.data());
if (!m_show_file.is_open()) {
OLA_FATAL << "Can't open " << m_filename << ": " << strerror(errno);
return false;
}
string line;
ReadLine(&line);
if (line != OLA_SHOW_HEADER) {
OLA_WARN << "Invalid show file, expecting " << OLA_SHOW_HEADER << " got "
<< line;
return false;
}
return true;
}
/**
* Reset to the start of the show
*/
void ShowLoader::Reset() {
m_show_file.clear();
m_show_file.seekg(0, std::ios::beg);
// skip over the first line
string line;
ReadLine(&line);
}
/**
* Get the next time offset
* @param timeout a pointer to the timeout in ms
*/
ShowLoader::State ShowLoader::NextTimeout(unsigned int *timeout) {
string line;
ReadLine(&line);
if (line.empty()) {
return END_OF_FILE;
}
if (!ola::StringToInt(line, timeout, true)) {
OLA_WARN << "Line " << m_line << ": Invalid timeout: " << line;
return INVALID_LINE;
}
return OK;
}
/**
* Read the next DMX frame.
* @param universe the universe to send on
* @param data the DMX data
*/
ShowLoader::State ShowLoader::NextFrame(unsigned int *universe,
DmxBuffer *data) {
string line;
ReadLine(&line);
if (line.empty()) {
return END_OF_FILE;
}
vector<string> inputs;
ola::StringSplit(line, &inputs);
if (inputs.size() != 2) {
OLA_WARN << "Line " << m_line << " invalid: " << line;
return INVALID_LINE;
}
if (!ola::StringToInt(inputs[0], universe, true)) {
OLA_WARN << "Line " << m_line << " invalid: " << line;
return INVALID_LINE;
}
return (data->SetFromString(inputs[1]) ? OK : INVALID_LINE);
}
void ShowLoader::ReadLine(string *line) {
getline(m_show_file, *line);
ola::StripSuffix(line, "\r");
m_line++;
}
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