[chronojump] webcamFfmpegSupportedModes parsing works on Linux

[Xavier de Blas <xaviblas src gnome org>]

commit e4b9ccc6192e33cdea5cf3b437475f618723a9d5
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jun 12 18:19:09 2019 +0200

    webcamFfmpegSupportedModes parsing works on Linux

 src/webcamFfmpegSupportedModes.cs | 62 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)
---
diff --git a/src/webcamFfmpegSupportedModes.cs b/src/webcamFfmpegSupportedModes.cs
index 7dd42333..1225e8c2 100644
--- a/src/webcamFfmpegSupportedModes.cs
+++ b/src/webcamFfmpegSupportedModes.cs
@@ -68,11 +68,71 @@ public class WebcamFfmpegSupportedModesLinux : WebcamFfmpegSupportedModes
                        return;
                }
 
-               modesStr = execute_result.stdout;
+               modesStr = parseSupportedModes(execute_result.stdout);
        }
 
+       //TODO: have a class that sorts resolutions and framerates
        protected override string parseSupportedModes(string allOutput)
        {
+               string parsedAll = "Resolution:\tFramerate";
+
+               /*
+                * break the big string in \n strings
+                * https://stackoverflow.com/a/1547483
+                */
+               string[] lines = allOutput.Split(
+                               new[] { Environment.NewLine },
+                               StringSplitOptions.None
+                               );
+
+               bool foundAtLeastOne = false;
+               foreach(string l in lines)
+               {
+                       LogB.Information("line: " + l);
+
+                       if(l.Contains("Pixel Format:"))
+                       {
+                               parsedAll += "\n\n" + l + "\n";
+                               continue;
+                       }
+
+                       if(l.Contains("Size: Discrete") && matchResolution(l) != "")
+                               parsedAll += "\n" + matchResolution(l) + ": ";
+
+                       if(l.Contains("Interval: Discrete") && l.Contains("fps") && matchFPS(l) != "")
+                       {
+                               parsedAll += "\t" + matchFPS(l);
+                               foundAtLeastOne = true;
+                       }
+               }
+
+               if(! foundAtLeastOne)
+                       return "Not found any mode supported for your camera.";
+
+               return parsedAll;
+       }
+
+       private string matchResolution(string l)
+       {
+               Match match = Regex.Match(l, @"(\d+)x(\d+)");
+
+               LogB.Information("match group count is 3?", (match.Groups.Count == 3).ToString());
+
+               if(match.Groups.Count == 3)
+                       return string.Format("{0}x{1}", match.Groups[1].Value, match.Groups[2].Value);
+
+               return "";
+       }
+
+       private string matchFPS(string l)
+       {
+               Match match = Regex.Match(l, @"\((\d+).(\d+) fps\)");
+
+               LogB.Information("match group count is 3?", (match.Groups.Count == 3).ToString());
+
+               if(match.Groups.Count == 3)
+                       return string.Format("{0}.{1}", match.Groups[1].Value, match.Groups[2].Value);
+
                return "";
        }
 }