add OP scan no cover embedded

BatchProcess/Program.cs

@@ -52,7 +52,8 @@ namespace BatchProcess
         private const string OP_CONVERT_FLAC_TO_AAC = "convert_flac_to_aac";
         private const string OP_CONVERT_LIB_FLAC_TO_AAC = "convert_lib_flac_to_aac";
         private const string OP_CONVERT_LIB_FLAC_TO_AAC_IN_DIR = "convert_lib_flac_to_aac_in_dir";
-        private const string OP_CONVERT_LIB_SUBSET_TO_MP4_IN_DIR = "op_convert_lib_subset_to_mp4_in_dir";
+        private const string OP_CONVERT_LIB_SUBSET_TO_MP4_IN_DIR = "convert_lib_subset_to_mp4_in_dir";
+        private const string OP_SCAN_LIB_NO_COVER = "scan_lib_no_cover";
 
         private static void RealMain(string[] args)
         {
@@ -90,6 +91,8 @@ namespace BatchProcess
                 Console.WriteLine($" *  {OP_CONVERT_LIB_SUBSET_TO_MP4_IN_DIR} <libDir> [subset]");
                 Console.WriteLine($"        Convert to mp4(static cover) and copy tags to output, default subset is AAC_Q1.00");
                 Console.WriteLine($"        libDir/Album/subset/Track.m4a -> libDir/Album/subset_MP4/Track.mp4");
+                Console.WriteLine($" *  {OP_SCAN_LIB_NO_COVER} <libDir> [pattern] [...]");
+                Console.WriteLine($"        Scan files in lib find no cover, pattern default *.flac");
                 Console.WriteLine($"");
                 Console.WriteLine($" +  More on demand");
                 return;
@@ -121,11 +124,38 @@ namespace BatchProcess
                 case OP_CONVERT_LIB_FLAC_TO_AAC: ConvertLibFlacToAac(argsToOp); break;
                 case OP_CONVERT_LIB_FLAC_TO_AAC_IN_DIR: ConvertLibFlacToAacInDir(argsToOp); break;
                 case OP_CONVERT_LIB_SUBSET_TO_MP4_IN_DIR: ConvertLibSubsetToMp4InDir(argsToOp); break;
+                case OP_SCAN_LIB_NO_COVER: ScanLibNoCover(argsToOp); break;
             }
         }
 
         // impl
 
+        private static void ScanLibNoCover(string[] args)
+        {
+            if (args.Length < 1) throw new ArgumentException("args least need 1");
+
+            var libDir = args[0];
+
+            var patterns = args.Length > 1
+                ? args.Skip(1).ToArray()
+                : new[] { "*.flac" };
+
+            if (false == Directory.Exists(libDir)) throw new DirectoryNotFoundException($"lib dir `{libDir}' not found.");
+
+            foreach (var discDir in Directory.GetDirectories(libDir))
+            {
+                var trackFiles = Microsoft.VisualBasic.FileIO.FileSystem.GetFiles(discDir, Microsoft.VisualBasic.FileIO.SearchOption.SearchTopLevelOnly, patterns);
+
+                foreach (var file in trackFiles)
+                {
+                    using var t = TagLib.File.Create(file);
+                    var hasCover = t.Tag.Pictures.Any(p => p.Type == PictureType.FrontCover);
+
+                    if (!hasCover) Console.WriteLine(file);
+                }
+            }
+        }
+
         private static void ConvertLibSubsetToMp4InDir(string[] args)
         {
             if (args.Length < 1) throw new ArgumentException("args least need 1");
@@ -154,8 +184,6 @@ namespace BatchProcess
 
                     if (coverBytes == null) { Console.WriteLine($"WARN: skip. no cover in `{track}'"); continue; }
 
-                   
-
                     var tmp = Path.GetTempFileName();
                     File.WriteAllBytes(tmp, coverBytes);
 
@@ -171,7 +199,7 @@ namespace BatchProcess
                         "-i",track,
                         "-map_metadata","-1","-map_chapters","-1",
                         "-shortest",
-                        
+
                         "-vf","scale=-1:480,pad=ceil(iw/2)*2:ceil(ih/2)*2",
 
                         "-c:v","h264","-pix_fmt","yuv420p",
@@ -179,7 +207,7 @@ namespace BatchProcess
                         "-crf","28","-bf","1250","-g","1250","-keyint_min","250",
 
                         "-c:a","copy",
-                        
+
                         outFile
                     };
 
@@ -190,7 +218,6 @@ namespace BatchProcess
                             FileName = "ffmpeg",
                             CreateNoWindow = false,
                             UseShellExecute = false,
-                            
                         }
                     };
                     foreach (var item in ffMpegArgs) process.StartInfo.ArgumentList.Add(item);