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/*
Audio File Library
Copyright (C) 2010-2012, Michael Pruett <michael@68k.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "FileModule.h"
#include "File.h"
#include "Track.h"
#include <errno.h>
#include <string.h>
FileModule::FileModule(Mode mode, Track *track, File *fh, bool canSeek) :
m_mode(mode),
m_track(track),
m_fh(fh),
m_canSeek(canSeek)
{
track->fpos_next_frame = track->fpos_first_frame;
track->frames2ignore = 0;
}
ssize_t FileModule::read(void *data, size_t nbytes)
{
ssize_t bytesRead = m_fh->read(data, nbytes);
if (bytesRead > 0)
{
m_track->fpos_next_frame += bytesRead;
}
return bytesRead;
}
ssize_t FileModule::write(const void *data, size_t nbytes)
{
ssize_t bytesWritten = m_fh->write(data, nbytes);
if (bytesWritten > 0)
{
m_track->fpos_next_frame += bytesWritten;
m_track->data_size += bytesWritten;
}
return bytesWritten;
}
off_t FileModule::seek(off_t offset)
{
return m_fh->seek(offset, File::SeekFromBeginning);
}
off_t FileModule::tell()
{
return m_fh->tell();
}
off_t FileModule::length()
{
return m_fh->length();
}
void FileModule::reportReadError(AFframecount framesRead,
AFframecount framesToRead)
{
// Report error if we haven't already.
if (!m_track->filemodhappy)
return;
_af_error(AF_BAD_READ,
"file missing data -- read %jd frames, should be %jd",
static_cast<intmax_t>(m_track->nextfframe),
static_cast<intmax_t>(m_track->totalfframes));
m_track->filemodhappy = false;
}
void FileModule::reportWriteError(AFframecount framesWritten,
AFframecount framesToWrite)
{
// Report error if we haven't already.
if (!m_track->filemodhappy)
return;
if (framesWritten < 0)
{
// Signal I/O error.
_af_error(AF_BAD_WRITE,
"unable to write data (%s) -- wrote %jd out of %jd frames",
strerror(errno),
static_cast<intmax_t>(m_track->nextfframe),
static_cast<intmax_t>(m_track->nextfframe + framesToWrite));
}
else
{
// Signal disk full error.
_af_error(AF_BAD_WRITE,
"unable to write data (disk full) -- "
"wrote %jd out of %jd frames",
static_cast<intmax_t>(m_track->nextfframe + framesWritten),
static_cast<intmax_t>(m_track->nextfframe + framesToWrite));
}
m_track->filemodhappy = false;
}
int FileModule::bufferSize() const
{
if (mode() == Compress)
return outChunk()->frameCount * inChunk()->f.bytesPerFrame(true);
else
return inChunk()->frameCount * outChunk()->f.bytesPerFrame(true);
}
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