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package de.danoeh.antennapod.parser.feed.util;
import android.webkit.MimeTypeMap;
import androidx.annotation.Nullable;
import org.apache.commons.io.FilenameUtils;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Utility class for handling MIME-Types of enclosures.
* */
public class MimeTypeUtils {
public static final String OCTET_STREAM = "application/octet-stream";
// based on https://developer.android.com/guide/topics/media/media-formats
static final Set<String> AUDIO_FILE_EXTENSIONS = new HashSet<>(Arrays.asList(
"3gp", "aac", "amr", "flac", "imy", "m4a", "m4b", "mid", "mkv", "mp3", "mp4", "mxmf", "oga",
"ogg", "ogx", "opus", "ota", "rtttl", "rtx", "wav", "xmf"
));
static final Set<String> VIDEO_FILE_EXTENSIONS = new HashSet<>(Arrays.asList(
"3gp", "mkv", "mp4", "ogg", "ogv", "ogx", "webm"
));
private MimeTypeUtils() {
}
@Nullable
public static String getMimeType(@Nullable String type, @Nullable String filename) {
if (isMediaFile(type) && !OCTET_STREAM.equals(type)) {
return type;
}
String filenameType = MimeTypeUtils.getMimeTypeFromUrl(filename);
if (isMediaFile(filenameType)) {
return filenameType;
}
return type;
}
public static boolean isMediaFile(String type) {
if (type == null) {
return false;
} else {
return type.startsWith("audio/")
|| type.startsWith("video/")
|| type.equals("application/ogg")
|| type.equals("application/octet-stream");
}
}
public static boolean isImageFile(String type) {
if (type == null) {
return false;
} else {
return type.startsWith("image/");
}
}
/**
* Should be used if mime-type of enclosure tag is not supported. This
* method will return the mime-type of the file extension.
*/
private static String getMimeTypeFromUrl(String url) {
if (url == null) {
return null;
}
String extension = FilenameUtils.getExtension(url);
String mapResult = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
if (mapResult != null) {
return mapResult;
}
if (AUDIO_FILE_EXTENSIONS.contains(extension)) {
return "audio/*";
} else if (VIDEO_FILE_EXTENSIONS.contains(extension)) {
return "video/*";
}
return null;
}
}
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