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using MediaBrowser.Model.Extensions;
using MediaBrowser.Model.Logging;
using System;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
namespace MediaBrowser.Controller.MediaEncoding
{
public class JobLogger
{
private readonly CultureInfo _usCulture = new CultureInfo("en-US");
private readonly ILogger _logger;
public JobLogger(ILogger logger)
{
_logger = logger;
}
public async void StartStreamingLog(EncodingJobInfo state, Stream source, Stream target)
{
try
{
using (var reader = new StreamReader(source))
{
while (!reader.EndOfStream)
{
var line = await reader.ReadLineAsync().ConfigureAwait(false);
ParseLogLine(line, state);
var bytes = Encoding.UTF8.GetBytes(Environment.NewLine + line);
await target.WriteAsync(bytes, 0, bytes.Length).ConfigureAwait(false);
await target.FlushAsync().ConfigureAwait(false);
}
}
}
catch (ObjectDisposedException)
{
// Don't spam the log. This doesn't seem to throw in windows, but sometimes under linux
}
catch (Exception ex)
{
_logger.ErrorException("Error reading ffmpeg log", ex);
}
}
private void ParseLogLine(string line, EncodingJobInfo state)
{
float? framerate = null;
double? percent = null;
TimeSpan? transcodingPosition = null;
long? bytesTranscoded = null;
int? bitRate = null;
var parts = line.Split(' ');
var totalMs = state.RunTimeTicks.HasValue
? TimeSpan.FromTicks(state.RunTimeTicks.Value).TotalMilliseconds
: 0;
var startMs = state.BaseRequest.StartTimeTicks.HasValue
? TimeSpan.FromTicks(state.BaseRequest.StartTimeTicks.Value).TotalMilliseconds
: 0;
for (var i = 0; i < parts.Length; i++)
{
var part = parts[i];
if (string.Equals(part, "fps=", StringComparison.OrdinalIgnoreCase) &&
(i + 1 < parts.Length))
{
var rate = parts[i + 1];
float val;
if (float.TryParse(rate, NumberStyles.Any, _usCulture, out val))
{
framerate = val;
}
}
else if (state.RunTimeTicks.HasValue &&
part.StartsWith("time=", StringComparison.OrdinalIgnoreCase))
{
var time = part.Split(new[] { '=' }, 2).Last();
TimeSpan val;
if (TimeSpan.TryParse(time, _usCulture, out val))
{
var currentMs = startMs + val.TotalMilliseconds;
var percentVal = currentMs / totalMs;
percent = 100 * percentVal;
transcodingPosition = val;
}
}
else if (part.StartsWith("size=", StringComparison.OrdinalIgnoreCase))
{
var size = part.Split(new[] { '=' }, 2).Last();
int? scale = null;
if (size.IndexOf("kb", StringComparison.OrdinalIgnoreCase) != -1)
{
scale = 1024;
size = size.Replace("kb", string.Empty, StringComparison.OrdinalIgnoreCase);
}
if (scale.HasValue)
{
long val;
if (long.TryParse(size, NumberStyles.Any, _usCulture, out val))
{
bytesTranscoded = val * scale.Value;
}
}
}
else if (part.StartsWith("bitrate=", StringComparison.OrdinalIgnoreCase))
{
var rate = part.Split(new[] { '=' }, 2).Last();
int? scale = null;
if (rate.IndexOf("kbits/s", StringComparison.OrdinalIgnoreCase) != -1)
{
scale = 1024;
rate = rate.Replace("kbits/s", string.Empty, StringComparison.OrdinalIgnoreCase);
}
if (scale.HasValue)
{
float val;
if (float.TryParse(rate, NumberStyles.Any, _usCulture, out val))
{
bitRate = (int)Math.Ceiling(val * scale.Value);
}
}
}
}
if (framerate.HasValue || percent.HasValue)
{
state.ReportTranscodingProgress(transcodingPosition, 0, percent, 0, bitRate);
}
}
}
}
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