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/*
Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2016 Matthias P. Braendli
http://mpb.li
File output
*/
/*
This file is part of ODR-DabMux.
ODR-DabMux 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 3 of the
License, or (at your option) any later version.
ODR-DabMux 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with ODR-DabMux. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include <cstdio>
#include <cstring>
#include <fcntl.h>
#include <limits.h>
#include "dabOutput.h"
int DabOutputFile::Open(const char* filename)
{
filename_ = SetEtiType(filename);
this->file_ = open(filename_.c_str(), O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666);
if (this->file_ == -1) {
perror(filename_.c_str());
return -1;
}
return 0;
}
int DabOutputFile::Write(void* buffer, int size)
{
uint8_t padding[6144];
const uint16_t frame_size = size;
++nbFrames_;
switch (this->type_) {
case ETI_FILE_TYPE_FRAMED:
// Writting nb of frames at beginning of file
if (lseek(this->file_, 0, SEEK_SET) == -1) goto FILE_WRITE_ERROR;
if (write(this->file_, &this->nbFrames_, 4) == -1) goto FILE_WRITE_ERROR;
// Writting nb frame length at end of file
if (lseek(this->file_, 0, SEEK_END) == -1) goto FILE_WRITE_ERROR;
if (write(this->file_, &frame_size, 2) == -1) goto FILE_WRITE_ERROR;
// Appending data
if (write(this->file_, buffer, size) == -1) goto FILE_WRITE_ERROR;
break;
case ETI_FILE_TYPE_STREAMED:
// Writting nb frame length at end of file
if (write(this->file_, &frame_size, 2) == -1) goto FILE_WRITE_ERROR;
// Appending data
if (write(this->file_, buffer, size) == -1) goto FILE_WRITE_ERROR;
break;
case ETI_FILE_TYPE_RAW:
// Appending data
if (write(this->file_, buffer, size) == -1) goto FILE_WRITE_ERROR;
// Appending padding
memset(padding, 0x55, 6144 - size);
if (write(this->file_, padding, 6144 - size) == -1) goto FILE_WRITE_ERROR;
break;
case ETI_FILE_TYPE_NONE:
default:
etiLog.log(error, "File type is not supported.\n");
return -1;
}
return size;
FILE_WRITE_ERROR:
perror("Error while writting to file");
return -1;
}
int DabOutputFile::Close()
{
if (close(this->file_) == 0) {
this->file_ = -1;
return 0;
}
perror("Can't close file");
return -1;
}
std::string DabOutputFile::SetEtiType(const std::string& filename)
{
size_t ix = filename.find('?');
const std::string filename_before_q = filename.substr(0, ix);
if (ix != std::string::npos) {
do {
const size_t ix_key = ix + 1;
const size_t ix_eq = filename.find('=', ix);
if (ix_eq == std::string::npos) {
// no equals sign, not a valid query. Return up to the question mark
break;
}
const size_t ix_val = ix_eq + 1;
const std::string key = filename.substr(ix_key, ix_eq - ix_key);
ix = filename.find('&', ix);
const size_t len_value = (ix == std::string::npos) ? std::string::npos : ix - ix_val;
if (key == "type") {
const std::string value = filename.substr(ix_val, len_value);
if (value == "raw") {
this->type_ = ETI_FILE_TYPE_RAW;
break;
} else if (value == "framed") {
this->type_ = ETI_FILE_TYPE_FRAMED;
break;
} else if (value == "streamed") {
this->type_ = ETI_FILE_TYPE_STREAMED;
break;
} else {
std::stringstream ss;
ss << "File type '" << value << "' is not supported.";
throw std::runtime_error(ss.str());
}
}
}
while (ix != std::string::npos);
}
return filename_before_q;
}
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