file: Read more metadata from audio files

We can always read the basic format information (sample rate, bit depth,
etc.), but we will also print artist, album, and title if available in
the metadata.

Meta/Lagom/CMakeLists.txt

@@ -492,7 +492,7 @@ if (BUILD_LAGOM)
         if (NOT EMSCRIPTEN)
             # LibELF is part of LibC in SerenityOS builds, but not in Lagom.
             add_executable(file ../../Userland/Utilities/file.cpp)
-            target_link_libraries(file LibCompress LibCore LibELF LibGfx LibIPC LibMain)
+            target_link_libraries(file LibAudio LibCompress LibCore LibELF LibGfx LibIPC LibMain)
         endif()
 
         add_executable(gml-format ../../Userland/Utilities/gml-format.cpp)

Userland/BuggieBox/CMakeLists.txt

@@ -41,7 +41,7 @@ set(utility_srcs
 
 serenity_bin(BuggieBox)
 target_sources(BuggieBox PRIVATE main.cpp)
-target_link_libraries(BuggieBox PRIVATE LibMain LibShell LibCompress LibCore LibCrypto LibGfx LibLine LibRegex)
+target_link_libraries(BuggieBox PRIVATE LibMain LibShell LibCompress LibCore LibCrypto LibGfx LibLine LibRegex LibAudio)
 
 foreach(file IN LISTS utility_srcs)
    buggiebox_utility(${file})

Userland/Utilities/CMakeLists.txt

@@ -87,7 +87,7 @@ target_link_libraries(diff PRIVATE LibDiff)
 target_link_libraries(disasm PRIVATE LibX86)
 target_link_libraries(expr PRIVATE LibRegex)
 target_link_libraries(fdtdump PRIVATE LibDeviceTree)
-target_link_libraries(file PRIVATE LibGfx LibIPC LibCompress)
+target_link_libraries(file PRIVATE LibGfx LibIPC LibCompress LibAudio)
 target_link_libraries(functrace PRIVATE LibDebug LibX86)
 target_link_libraries(gml-format PRIVATE LibGUI)
 target_link_libraries(grep PRIVATE LibRegex)

Userland/Utilities/file.cpp

@@ -5,6 +5,7 @@
  */
 
 #include <AK/Vector.h>
+#include <LibAudio/Loader.h>
 #include <LibCompress/Gzip.h>
 #include <LibCore/ArgsParser.h>
 #include <LibCore/File.h>
@@ -51,6 +52,48 @@ static Optional<DeprecatedString> image_details(StringView description, StringVi
     return builder.to_deprecated_string();
 }
 
+static Optional<DeprecatedString> audio_details(StringView description, StringView path)
+{
+    auto loader_or_error = Audio::Loader::create(path);
+    if (loader_or_error.is_error())
+        return {};
+
+    auto loader = loader_or_error.release_value();
+    StringBuilder builder;
+    builder.appendff("{}, {} Hz, {}-bit {}, {} samples ({} s)",
+        description,
+        loader->sample_rate(),
+        loader->bits_per_sample(),
+        loader->num_channels() == 1 ? "Mono" : "Stereo",
+        loader->total_samples(),
+        loader->total_samples() / loader->sample_rate());
+    auto metadata = loader->metadata();
+    Vector<String> metadata_parts;
+    if (metadata.title.has_value()) {
+        // FIXME: Use “pretty quotation” once our terminal fonts support these characters.
+        if (auto title_text = String::formatted("\"{}\"", metadata.title.value_or({})); !title_text.is_error()) {
+            // We intentionally discard the error, because not printing part of the metadata due to OOM is not a problem.
+            (void)metadata_parts.try_append(title_text.release_value());
+        }
+    }
+    if (metadata.album.has_value()) {
+        if (auto album_text = String::formatted("(Album: {})", metadata.album.value_or({})); !album_text.is_error())
+            (void)metadata_parts.try_append(album_text.release_value());
+    }
+    if (auto all_artists = metadata.all_artists(); !all_artists.is_error() && all_artists.value().has_value()) {
+        if (auto artist_text = String::formatted("by {}", all_artists.release_value().release_value()); !artist_text.is_error())
+            (void)metadata_parts.try_append(artist_text.release_value());
+    }
+
+    if (!metadata_parts.is_empty()) {
+        // New line for the metadata.
+        builder.append_code_point('\n');
+        builder.join(" "sv, metadata_parts);
+    }
+
+    return builder.to_deprecated_string();
+}
+
 static Optional<DeprecatedString> gzip_details(StringView description, StringView path)
 {
     auto file_or_error = Core::MappedFile::map(path);
@@ -113,11 +156,11 @@ static Optional<DeprecatedString> elf_details(StringView description, StringView
     __ENUMERATE_MIME_TYPE_DESCRIPTION("application/tar"sv, "tape archive"sv, description_only)                          \
     __ENUMERATE_MIME_TYPE_DESCRIPTION("application/wasm"sv, "WebAssembly bytecode"sv, description_only)                 \
     __ENUMERATE_MIME_TYPE_DESCRIPTION("application/x-7z-compressed"sv, "7-Zip archive"sv, description_only)             \
-    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/flac"sv, "FLAC audio"sv, description_only)                                 \
+    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/flac"sv, "FLAC audio"sv, audio_details)                                    \
-    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/midi"sv, "MIDI notes"sv, description_only)                                 \
+    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/midi"sv, "MIDI notes"sv, audio_details)                                    \
-    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/mpeg"sv, "MP3 audio"sv, description_only)                                  \
+    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/mpeg"sv, "MP3 audio"sv, audio_details)                                     \
-    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/qoa"sv, "Quite OK Audio"sv, description_only)                              \
+    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/qoa"sv, "Quite OK Audio"sv, audio_details)                                 \
-    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/wave"sv, "WAVE audio"sv, description_only)                                 \
+    __ENUMERATE_MIME_TYPE_DESCRIPTION("audio/wave"sv, "WAVE audio"sv, audio_details)                                    \
     __ENUMERATE_MIME_TYPE_DESCRIPTION("extra/blender"sv, "Blender project file"sv, description_only)                    \
     __ENUMERATE_MIME_TYPE_DESCRIPTION("extra/elf"sv, "ELF"sv, elf_details)                                              \
     __ENUMERATE_MIME_TYPE_DESCRIPTION("extra/ext"sv, "ext filesystem"sv, description_only)                              \