[chronojump] Improvements on last commit

[Xavier de Blas <xaviblas src gnome org>]

commit 60b7cf8ea1be4d438996fd484057b3d7ba4b7341
Author: Xavier de Blas <xaviblas gmail com>
Date:   Wed Jun 12 17:41:26 2019 +0200

    Improvements on last commit

 src/webcamFfmpegSupportedModes.cs | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)
---
diff --git a/src/webcamFfmpegSupportedModes.cs b/src/webcamFfmpegSupportedModes.cs
index 2f479bcc..7dd42333 100644
--- a/src/webcamFfmpegSupportedModes.cs
+++ b/src/webcamFfmpegSupportedModes.cs
@@ -127,17 +127,20 @@ public class WebcamFfmpegSupportedModesMac : WebcamFfmpegSupportedModes
 
        public override void GetModes()
        {
+               bool testParsing = false; //change it to true to test the parsing method
+
+               if(testParsing)
+               {
+                       modesStr = parseSupportedModes(parseSupportedModesTestString);
+                       return;
+               }
+
                //select and impossible mode just to get an error on mac, this error will give us the 
"Supported modes"
                Webcam webcamPlay = new WebcamFfmpeg (Webcam.Action.PLAYPREVIEW, UtilAll.GetOSEnum(),
                                cameraCode, "8000x8000", "8000");
 
                Webcam.Result result = webcamPlay.PlayPreviewNoBackgroundWantStdoutAndStderr();
-
-                string parsed = parseSupportedModes(result.output);
-                //use this to test the parsing method
-                //string parsed = parseSupportedModes(parseSupportedModesTestString);
-
-               modesStr = result.output;
+               modesStr = parseSupportedModes(result.output);
        }
 
        protected override string parseSupportedModes(string allOutput)
@@ -154,6 +157,7 @@ public class WebcamFfmpegSupportedModesMac : WebcamFfmpegSupportedModes
                                );
 
                bool started = false;
+               bool foundAtLeastOne = false;
                foreach(string l in lines)
                {
                        LogB.Information("line: " + l);
@@ -169,12 +173,19 @@ public class WebcamFfmpegSupportedModesMac : WebcamFfmpegSupportedModes
 
                        string parsedLine = parseSupportedMode(l);
                        if(parsedLine != "")
+                       {
                                parsedAll += parsedLine + "\n";
+                               foundAtLeastOne = true;
+                       }
 
                        //after the list of video devices comes the list of audio devices, skip it
                        if(l.Contains("Input/output"))
                                break;
                }
+
+               if(! foundAtLeastOne)
+                       return "Not found any mode supported for your camera.";
+
                return parsedAll;
        }