Files
fluxengine/lib/reader.cc

108 lines
2.6 KiB
C++

#include "globals.h"
#include "flags.h"
#include "usb.h"
#include "reader.h"
#include "fluxmap.h"
#include "sql.h"
#include "dataspec.h"
#include "fmt/format.h"
static DataSpecFlag source(
{ "--source", "-s" },
"source for data",
":t=0-79:s=0-1");
static StringFlag destination(
{ "--write-flux", "-f" },
"write the raw magnetic flux to this file",
"");
static SettableFlag justRead(
{ "--just-read", "-R" },
"just read the disk but do no further processing");
static IntFlag revolutions(
{ "--revolutions" },
"read this many revolutions of the disk",
1);
static sqlite3* indb;
static sqlite3* outdb;
void setReaderDefaultSource(const std::string& source)
{
::source.set(source);
}
std::unique_ptr<Fluxmap> ReaderTrack::read()
{
std::cout << fmt::format("{0:>3}.{1}: ", track, side) << std::flush;
std::unique_ptr<Fluxmap> fluxmap = reallyRead();
std::cout << fmt::format(
"{0} ms in {1} bytes", int(fluxmap->duration()/1e6), fluxmap->bytes()) << std::endl;
if (outdb)
sqlWriteFlux(outdb, track, side, *fluxmap);
return fluxmap;
}
std::unique_ptr<Fluxmap> CapturedReaderTrack::reallyRead()
{
usbSeek(track);
return usbRead(side, revolutions);
}
std::unique_ptr<Fluxmap> FileReaderTrack::reallyRead()
{
if (!indb)
{
indb = sqlOpen(source.value.filename, SQLITE_OPEN_READONLY);
atexit([]() { sqlClose(indb); });
}
return sqlReadFlux(indb, track, side);
}
std::vector<std::unique_ptr<ReaderTrack>> readTracks()
{
const DataSpec& dataSpec = source.value;
std::cout << "Reading from: " << dataSpec << std::endl;
if (!destination.value.empty())
{
outdb = sqlOpen(destination, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE);
std::cout << "Writing a copy of the flux to " << destination.value << std::endl;
sqlPrepareFlux(outdb);
sqlStmt(outdb, "BEGIN;");
atexit([]()
{
sqlStmt(outdb, "COMMIT;");
sqlClose(outdb);
}
);
}
std::vector<std::unique_ptr<ReaderTrack>> tracks;
for (const auto& location : dataSpec.locations)
{
std::unique_ptr<ReaderTrack> t(
dataSpec.filename.empty()
? (ReaderTrack*)new CapturedReaderTrack()
: (ReaderTrack*)new FileReaderTrack());
t->track = location.track;
t->side = location.side;
tracks.push_back(std::move(t));
}
if (justRead)
{
for (auto& track : tracks)
track->read();
std::cout << "--just-read specified, terminating without further processing" << std::endl;
exit(0);
}
return tracks;
}