public static int ConvertAndDecode(string inputFile, string inputFileType, string outputFile)
{
ProcessStartInfo startInfo = GetStartInfo($"ffmpeg -hide_banner -loglevel warning -i \"{inputFile}\" -f {inputFileType} - | sox -V2 -V2 -t {inputFileType} - -t raw -e signed-integer -b 16 -r 22050 - remix 1", true, true);
FileStream fs = null;
if (outputFile != null)
{
File.WriteAllText(outputFile, string.Empty);
fs = new FileStream(outputFile, FileMode.OpenOrCreate);
}
ulong bytesReadIn = 0;
using (Process soxProcess = Process.Start(startInfo)) {
if (!Program.SuppressInfo)
{
Console.WriteLine("info: ffmpeg and sox have started");
}
soxProcess.EnableRaisingEvents = true;
soxProcess.BeginErrorReadLine();
soxProcess.ErrorDataReceived += new DataReceivedEventHandler((s, e) => {
if (!string.IsNullOrWhiteSpace(e.Data))
{
Console.WriteLine($"proc: {e.Data}\n"); // arguments have been modified in ffmpeg so that it only prints to standard error when warnings are raised or errors occur
}
});
FileStream baseStream = (FileStream)soxProcess.StandardOutput.BaseStream;
int lastRead = 0;
bool record = false;
bool lastRecord = false;
string fileName = null;
bool needToBuffer = true;
Console.WriteLine();
do // sox nor ffmpeg will not produce anything on stdout if an error occurs
{
byte[] buffer = new byte[8192];
lastRead = baseStream.Read(buffer, 0, buffer.Length);
bytesReadIn += (ulong)lastRead;
Tuple <bool, uint, uint> info = null;
if (lastRead > 0)
{
info = Decode.DecodeEAS(buffer, lastRead);
lastRecord = record;
record = info.Item1;
if (fs != null)
{
fs.Write(buffer, 0, lastRead);
fs.Flush();
}
}
if (!record && !lastRecord)
{
Console.CursorTop -= 1;
Console.WriteLine($"Total bytes read in: {Commas(bytesReadIn)}");
}
else if (!record && lastRecord)
{
Console.WriteLine();
}
if (bufferBefore != null)
{
if (needToBuffer)
{
for (int i = 0; i < lastRead; i++)
{
bufferBefore.Enqueue(buffer[i]);
}
if (easRecord != null && bufferBefore.Size == bufferBefore.Count)
{
Console.WriteLine("Stopped recording EAS alert");
SaveEASRecording(ref easRecord, bufferBefore, fileName);
}
}
if (record && easRecord == null)
{
Console.WriteLine("Recording EAS alert");
DateTime recordingStarted = DateTime.Now;
string month = $"{AddLeadingZero(recordingStarted.Month)}{months[recordingStarted.Month - 1]}";
string time = $"{AddLeadingZero(recordingStarted.Hour)}{AddLeadingZero(recordingStarted.Minute)}{AddLeadingZero(recordingStarted.Second)}";
fileName = $"{recordingStarted.Year}_{month}_{recordingStarted.Day} - {time}";
int idx = 1;
while (File.Exists($"{fileName} ({idx}).raw"))
{
idx++;
}
fileName += $" ({idx})";
easRecord = new FileStream($"{fileName}.raw", FileMode.OpenOrCreate);
while (!bufferBefore.IsEmpty)
{
byte[] b = new byte[1];
if (bufferBefore.TryDequeue(out b[0]))
{
easRecord.Write(b);
}
}
needToBuffer = false;
}
else if (record && easRecord != null)
{
if (needToBuffer)
{
while (!bufferBefore.IsEmpty)
{
byte[] b = new byte[1];
if (bufferBefore.TryDequeue(out b[0]))
{
easRecord.Write(b);
}
needToBuffer = false;
}
}
else
{
easRecord.Write(buffer, 0, lastRead);
}
}
else if (!record && easRecord != null && !needToBuffer)
{
easRecord.Write(buffer, 0, lastRead);
needToBuffer = true;
bufferBefore = new FixedSizeQueue <byte>(bitrate * 5);
}
}
} while (lastRead > 0);
if (easRecord != null)
{
SaveEASRecording(ref easRecord, bufferBefore, fileName);
}
soxProcess.WaitForExit();
}
return(0);
}
