Pattern for parsing EBU STL (EBU Tech 3264) subtitle files

README.md

@@ -81,6 +81,7 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | DS_Store | | [`patterns/dsstore.hexpat`](patterns/dsstore.hexpat) | .DS_Store file format |
 | DTA | | [`patterns/max_v104.hexpat`](patterns/max_v104.hexpat) | Mechanized Assault and Exploration v1.04 (strategy game) save file format |
 | DTED | | [`patterns/dted.hexpat`](patterns/dted.hexpat) | Digital Terrain Elevation Data (DTED) |
+| EBU STL | `application/x-ebu-stl` | [`patterns/ebu_stl.hexpat`](patterns/ebu_stl.hexpat) | EBU STL broadcast subtitle format |
 | ELF  | `application/x-executable` | [`patterns/elf.hexpat`](patterns/elf.hexpat) | ELF header in elf binaries |
 | ESP32 Image | | [`patterns/esp32_image.hexpat`](patterns/esp32_image.hexpat) | Firmware image format for the ESP32 chip family |
 | EVTX | `application/x-ms-evtx` | [`patterns/evtx.hexpat`](patterns/evtx.hexpat) | MS Windows Vista Event Log |

patterns/ebu_stl.hexpat

@@ -0,0 +1,95 @@
+#pragma description EBU STL Subtitle File Format (EBU Tech 3264)
+#pragma endian big
+#pragma MIME application/x-ebu-stl
+
+import std.io;
+import std.mem;
+
+// EBU STL (EBU Tech 3264) - Subtitling data exchange format
+// Used for broadcast subtitle distribution
+
+// GSI Block - General Subtitle Information (1024 bytes)
+struct GSI_Block {
+    char cpn[3]     [[name("Code Page Number"), color("4A90E2")]];
+    char dfc[8]     [[name("Disk Format Code"), color("4A90E2")]];
+    char dsc        [[name("Display Standard Code"), color("4A90E2")]];
+    char cct[2]     [[name("Character Code Table"), color("4A90E2")]];
+    char lc[2]      [[name("Language Code"), color("4A90E2")]];
+
+    char opt[32]    [[name("Original Programme Title"), color("50C878")]];
+    char oet[32]    [[name("Original Episode Title"), color("50C878")]];
+    char tpt[32]    [[name("Translated Programme Title"), color("50C878")]];
+    char tet[32]    [[name("Translated Episode Title"), color("50C878")]];
+
+    char tn[32]     [[name("Translator's Name"), color("9B59B6")]];
+    char tcd[32]    [[name("Translator's Contact Details"), color("9B59B6")]];
+
+    char slr[16]    [[name("Subtitle List Reference Code"), color("E67E22")]];
+
+    char cd[6]      [[name("Creation Date"), color("E74C3C")]];
+    char rd[6]      [[name("Revision Date"), color("E74C3C")]];
+    char rn[2]      [[name("Revision Number"), color("E74C3C")]];
+
+    char tnb[5]     [[name("Total Number of TTI Blocks"), color("F39C12")]];
+    char tns[5]     [[name("Total Number of Subtitles"), color("F39C12")]];
+    char tng[3]     [[name("Total Number of Subtitle Groups"), color("F39C12")]];
+
+    char mnc[2]     [[name("Max Characters per Row"), color("1ABC9C")]];
+    char mnr[2]     [[name("Max Number of Rows"), color("1ABC9C")]];
+
+    char tcs        [[name("Time Code Status"), color("3498DB")]];
+    char tcp[8]     [[name("Time Code: Start-of-Programme"), color("3498DB")]];
+    char tcf[8]     [[name("Time Code: First In-Cue"), color("3498DB")]];
+
+    u8 tnd          [[name("Total Number of Disks"), color("95A5A6")]];
+    u8 dsn          [[name("Disk Sequence Number"), color("95A5A6")]];
+
+    char co[3]      [[name("Country of Origin"), color("E91E63")]];
+
+    char pub[32]    [[name("Publisher"), color("8E44AD")]];
+    char en[32]     [[name("Editor's Name"), color("8E44AD")]];
+    char ecd[32]    [[name("Editor's Contact Details"), color("8E44AD")]];
+
+    u8 spare[75]    [[name("Spare Bytes"), color("34495E")]];
+    u8 uda[576]     [[name("User-Defined Area"), color("7F8C8D")]];
+} [[static]];
+
+// TTI Block - Text and Timing Information (128 bytes)
+struct TTI_Block {
+    u8 sgn          [[name("Subtitle Group Number"), color("FF6B6B")]];
+    u16 sn          [[name("Subtitle Number"), color("FF6B6B")]];
+    u8 ebn          [[name("Extension Block Number"), color("FF6B6B")]];
+    u8 cs           [[name("Cumulative Status"), color("FF6B6B")]];
+
+    u8 tci_hours    [[name("Time Code In: Hours"), color("4ECDC4")]];
+    u8 tci_mins     [[name("Time Code In: Minutes"), color("4ECDC4")]];
+    u8 tci_secs     [[name("Time Code In: Seconds"), color("4ECDC4")]];
+    u8 tci_frames   [[name("Time Code In: Frames"), color("4ECDC4")]];
+
+    u8 tco_hours    [[name("Time Code Out: Hours"), color("44AF69")]];
+    u8 tco_mins     [[name("Time Code Out: Minutes"), color("44AF69")]];
+    u8 tco_secs     [[name("Time Code Out: Seconds"), color("44AF69")]];
+    u8 tco_frames   [[name("Time Code Out: Frames"), color("44AF69")]];
+
+    u8 vp           [[name("Vertical Position"), color("F7B801")]];
+    u8 jc           [[name("Justification Code"), color("F7B801")]];
+    u8 cf           [[name("Comment Flag"), color("F7B801")]];
+
+    u8 tf[112]      [[name("Text Field"), color("C77DFF")]];
+};
+
+struct EBU_STL {
+    GSI_Block gsi [[name("General Subtitle Information")]];
+    TTI_Block tti[while(!std::mem::eof())] [[name("Text and Timing Information")]];
+};
+
+EBU_STL stl_file @ 0x00;
+
+// Display file summary
+std::print("=== EBU STL File ===");
+std::print("Created: {}", stl_file.gsi.cd);
+std::print("Format: {}", stl_file.gsi.dfc);
+std::print("Language: {}", stl_file.gsi.lc);
+std::print("Country: {}", stl_file.gsi.co);
+std::print("Subtitles: {}", stl_file.gsi.tns);
+std::print("Max Characters Per Row: {}", stl_file.gsi.mnc);