Replaces the converter abstract class with an interface
This commit is contained in:
@@ -1,515 +1,17 @@
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package net.knarcraft.ffmpegconverter.converter;
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import net.knarcraft.ffmpegconverter.streams.AudioStream;
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import net.knarcraft.ffmpegconverter.streams.StreamObject;
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import net.knarcraft.ffmpegconverter.streams.SubtitleStream;
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import net.knarcraft.ffmpegconverter.streams.VideoStream;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.OutputStreamWriter;
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import java.lang.reflect.Array;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.function.Predicate;
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/**
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* Implements all methods which can be usefull for any implementation of a converter.
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* This interface describes a file converter
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*/
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public abstract class Converter {
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String ffprobePath;
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String ffmpegPath;
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boolean DEBUG = false;
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private static final BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));
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private static final String PROBE_SPLIT_CHARACTER = "øæåÆØå";
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public abstract String[] getValidFormats();
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public abstract void convert(File file) throws IOException;
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final String[] AUDIO_FORMATS = new String[] {".3gp", ".aa", ".aac", ".aax", ".act", ".aiff", ".amr", ".ape", ".au",
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".awb", ".dct", ".dss", ".dvf", ".flac", ".gsm", ".iklax", ".ivs", ".m4a", ".m4b", ".m4p", ".mmf", ".mp3",
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".mpc", ".msv", ".ogg", ".oga", ".mogg", ".opus", ".ra", ".rm", ".raw", ".sln", ".tta", ".vox", ".wav",
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".wma", ".wv", ".webm", ".8svx"};
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final String[] VIDEO_FORMATS = new String[] {".avi", ".mpg", ".mpeg", ".mkv", ".wmv", ".flv", ".webm", ".3gp",
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".rmvb", ".3gpp", ".mts", ".m4v", ".mov", ".rm", ".asf", ".mp4", ".vob", ".ogv", ".drc", ".qt", ".yuv",
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".asm", ".m4p", ".mp2", ".mpe", ".mpv", ".m2v", ".svi", ".3g2", ".roq", ".nsv"};
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public interface Converter {
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/**
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* Gets streams from a file
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* @param ffprobePath <p>The path/command to ffprobe.</p>
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* @param file <p>The file to probe.</p>
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* @return <p>A list of StreamObjects.</p>
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* @throws IOException <p>If the process can't be read.</p>
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* Converts the given file
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* @param file <p>The file to convert.</p>
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* @throws IOException <p>If the file cannot be converted.</p>
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*/
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static List<StreamObject> probeFile(String ffprobePath, File file) throws IOException {
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ProcessBuilder builderProbe = new ProcessBuilder(
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ffprobePath,
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"-v",
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"error",
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"-show_entries",
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"stream_tags=language,title:stream=index,codec_name,codec_type,channels",
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file.toString()
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);
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print("Probe command: ");
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printl(builderProbe.command().toString());
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builderProbe.redirectErrorStream(true);
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Process processProbe = builderProbe.start();
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BufferedReader readerProbe = new BufferedReader(new InputStreamReader(processProbe.getInputStream()));
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StringBuilder output = new StringBuilder();
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while (processProbe.isAlive()) {
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String read = read(readerProbe, PROBE_SPLIT_CHARACTER);
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if (!read.equals("")) {
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print(read);
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output.append(read);
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}
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}
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return parseStreams(stringBetween(output.toString(), "[STREAM]", "[/STREAM]"));
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}
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/**
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* Adds parentheses with an integer if the output file already exists
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* @param targetPath <p>The path the file should ideally be saved at.</p>
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* @param extension <p>The extension of the target file.</p>
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* @return <p>A filename guaranteed not to collide with other files.</p>
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*/
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static String fileCollisionPrevention(String targetPath, String extension) {
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File newFile = new File(targetPath);
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String fileName = stripExtension(targetPath);
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int i = 1;
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while (newFile.exists()) {
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newFile = new File(fileName + "(" + i++ + ")" + "." + extension);
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}
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return newFile.toString();
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}
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/**
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* Starts and prints output of a process
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* @param process <p>The process to run.</p>
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* @param folder <p>The folder the process should run in.</p>
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* @throws IOException <p>If the process can't be read.</p>
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*/
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static void convertProcess(ProcessBuilder process, File folder) throws IOException {
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print("Command to be run: ");
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printl(process.command().toString());
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process.directory(folder);
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process.redirectErrorStream(true);
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Process processConvert = process.start();
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BufferedReader readerConvert = new BufferedReader(new InputStreamReader(processConvert.getInputStream()));
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while (processConvert.isAlive()) {
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String read = read(readerConvert, "\n");
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if (!read.equals("")) {
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printl(read);
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}
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}
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printl("Process is finished.");
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}
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/**
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* Reads from a process reader
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* @param reader <p>The reader of a process.</p>
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* @return <p>The output from the read.</p>
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* @throws IOException <p>On reader failure.</p>
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*/
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private static String read(BufferedReader reader, String spacer) throws IOException {
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String line;
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StringBuilder text = new StringBuilder();
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while (reader.ready() && (line = reader.readLine()) != null && !line.equals("") && !line.equals("\n")) {
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text.append(line).append(spacer);
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}
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return text.toString().trim();
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}
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/**
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* Creates a list containing all required arguments for converting a video to a web playable video
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* @param executable <p>The executable to use (ffmpeg/ffprobe).</p>
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* @param fileName <p>The name of the file to execute on.</p>
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* @return <p>A base list of ffmpeg commands for converting a video for web</p>
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*/
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static List<String> ffmpegWebVideo(String executable, String fileName) {
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List<String> command = generalFile(executable, fileName);
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command.add("-vcodec");
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command.add("h264");
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command.add("-pix_fmt");
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command.add("yuv420p");
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command.add("-ar");
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command.add("48000");
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command.add("-movflags");
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command.add("+faststart");
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return command;
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}
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/**
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* Creates a list containing command line arguments for a general file
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* @param executable <p>The executable to use (ffmpeg/ffprobe).</p>
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* @param fileName <p>The name of the file to execute on.</p>
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* @return <p>A base list of ffmpeg commands for converting a file.</p>
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*/
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static List<String> generalFile(String executable, String fileName) {
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List<String> command = new ArrayList<>();
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command.add(executable);
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command.add("-nostdin");
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command.add("-i");
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command.add(fileName);
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return command;
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}
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/**
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* Adds debugging parameters for only converting parts of a file
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* @param command <p>The list containing the command to run.</p>
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* @param start <p>The offset before converting.</p>
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* @param length <p>The offset for stopping the conversion.</p>
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*/
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static void addDebug(List<String> command, int start, int length) {
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command.add("-ss");
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command.add("" + start);
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command.add("-t");
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command.add("" + length);
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}
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/**
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* Lists all indexes fulfilling a predicate
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* @param list <p>A list of ffprobe indexes.</p>
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* @return <p>An integer list containing just the wanted indexes</p>
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*/
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private static List<Integer> listIndexes(String[] list, Predicate<String> p) {
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List<Integer> indexes = new ArrayList<>();
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for (String str : list) {
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if (p.test(str)) {
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indexes.add(Integer.parseInt(stringBetweenSingle(str, "index=", PROBE_SPLIT_CHARACTER)));
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}
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}
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return indexes;
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}
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/**
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* Tests a predicate on a list
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* @param list <p>A list.</p>
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* @param p <p>A predicate</p>
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* @param <T> <p>The type of the list and the predicate.</p>
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* @return True if the list have an element for which the predicate is true
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*/
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private static <T> boolean testPredicate(T[] list, Predicate<T> p) {
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for (T o : list) {
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if (p.test(o)) {
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return true;
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}
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}
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return false;
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}
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/**
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* Finds all substrings between two substrings in a string
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* @param string <p>The string containing the substrings.</p>
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* @param start <p>The substring before the wanted substring.</p>
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* @param end <p>The substring after the wanted substring.</p>
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* @return <p>A list of all occurrences of the substring.</p>
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*/
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private static String[] stringBetween(String string, String start, String end) {
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int startPos = string.indexOf(start) + start.length();
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if (!string.contains(start) || string.indexOf(end, startPos) < startPos) {
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return new String[]{};
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}
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int endPos = string.indexOf(end, startPos);
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String outString = string.substring(startPos, endPos).trim();
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String nextString = string.substring(endPos + end.length());
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return concatenate(new String[]{outString}, stringBetween(nextString, start, end));
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}
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/**
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* Finds a substring between two substrings in a string
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* @param string <p>The string containing the substrings.</p>
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* @param start <p>The substring before the wanted substring.</p>
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* @param end <p>The substring after the wanted substring.</p>
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* @return <p>The wanted substring.</p>
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*/
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private static String stringBetweenSingle(String string, String start, String end) {
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int startPos = string.indexOf(start) + start.length();
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if (!string.contains(start) || string.indexOf(end, startPos) < startPos) {
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return "";
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}
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return string.substring(startPos, string.indexOf(end, startPos));
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}
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/**
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* Gets filename without extension from File object
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* @param file <p>A file object.</p>
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* @return <p>A filename.</p>
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*/
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static String stripExtension(File file) {
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return file.getName().substring(0, file.getName().lastIndexOf('.'));
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}
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/**
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* Removes the extension from a file name
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* @param file <p>A filename.</p>
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* @return <p>A filename without its extension.</p>
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*/
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static String stripExtension(String file) {
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return file.substring(0, file.lastIndexOf('.'));
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}
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/**
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* Combines two arrays to one
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* @param listA <p>The first array.</p>
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* @param listB <p>The second array.</p>
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* @param <T> <p>The type of the two lists.</p>
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* @return <p>A new array containing all elements from the two arrays.</p>
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*/
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public static <T> T[] concatenate(T[] listA, T[] listB) {
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int listALength = listA.length;
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int listBLength = listB.length;
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@SuppressWarnings("unchecked")
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T[] resultList = (T[]) Array.newInstance(listA.getClass().getComponentType(), listALength + listBLength);
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System.arraycopy(listA, 0, resultList, 0, listALength);
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System.arraycopy(listB, 0, resultList, listALength, listBLength);
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return resultList;
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}
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/**
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* Filters parsed streams into one of the stream types
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* @param streams <p>A list of stream objects.</p>
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* @param codecType <p>The codec type of the streams to select.</p>
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* @param <G> <p>The correct object type for the streams with the selected codec type.</p>
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* @return <p>A potentially shorter list of streams.</p>
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*/
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static <G extends StreamObject> List<G> filterStreamsByType(List<StreamObject> streams, String codecType) {
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Iterator<StreamObject> i = streams.iterator();
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List<G> newStreams = new ArrayList<>();
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while (i.hasNext()) {
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StreamObject next = i.next();
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if (next.getCodecType().equals(codecType)) {
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newStreams.add((G) next);
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}
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}
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return newStreams;
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}
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/**
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* Filters and sorts audio streams according to chosen languages
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* @param audioStreams <p>A list of audio streams.</p>
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* @param audioLanguages <p>A list of languages.</p>
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* @return <p>A list containing just audio tracks of chosen languages, sorted in order of languages.</p>
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*/
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static List<AudioStream> filterAudioStreams(List<AudioStream> audioStreams, String[] audioLanguages) {
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List<AudioStream> filtered = new ArrayList<>();
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for (String language : audioLanguages) {
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for (AudioStream stream : audioStreams) {
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if ((stream.getLanguage() != null && stream.getLanguage().equals(language)) || language.equals("*")) {
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filtered.add(stream);
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}
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}
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//Tries to reduce execution time from n^2
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audioStreams.removeAll(filtered);
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}
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return filtered;
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}
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/**
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* Filters and sorts subtitle streams according to chosen languages
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* @param subtitleStreams <p>A list of subtitle streams.</p>
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* @param subtitleLanguages <p>A list of languages.</p>
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* @param preventSignsAndSongs <p>Whether partial subtitles should be avoided.</p>
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* @return <p>A list containing just subtitles of chosen languages, sorted in order of languages.</p>
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*/
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static List<SubtitleStream> filterSubtitleStreams(List<SubtitleStream> subtitleStreams, String[] subtitleLanguages,
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boolean preventSignsAndSongs) {
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List<SubtitleStream> filtered = new ArrayList<>();
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//Go through languages. Select all subtitles of the language
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for (String language : subtitleLanguages) {
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for (SubtitleStream stream : subtitleStreams) {
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String streamLanguage = stream.getLanguage();
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if (((streamLanguage != null && streamLanguage.equals(language)) || language.equals("*")) &&
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(!preventSignsAndSongs || stream.getIsFullSubtitle())) {
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filtered.add(stream);
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}
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}
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//Tries to reduce execution time from n^2
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subtitleStreams.removeAll(filtered);
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}
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return filtered;
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}
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/**
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* Takes a list of all streams and parses each stream into one of three objects
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* @param streams <p>A list of all streams for the current file.</p>
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* @return <p>A list of StreamObjects.</p>
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*/
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private static List<StreamObject> parseStreams(String[] streams) {
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List<StreamObject> parsedStreams = new ArrayList<>();
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int relativeAudioIndex = 0;
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int relativeVideoIndex = 0;
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int relativeSubtitleIndex = 0;
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for (String stream : streams) {
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String[] streamParts = stream.split(PROBE_SPLIT_CHARACTER);
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if (stream.contains("codec_type=video")) {
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parsedStreams.add(parseVideoStream(streamParts, relativeVideoIndex++));
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} else if (stream.contains("codec_type=audio")) {
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parsedStreams.add(parseAudioStream(streamParts, relativeAudioIndex++));
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} else if (stream.contains("codec_type=subtitle")) {
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parsedStreams.add(parseSubtitleStream(streamParts, relativeSubtitleIndex++));
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}
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}
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return parsedStreams;
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}
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/**
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* Parses a list of video stream parameters to a video stream object
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* @param streamParts <p>A list of parameters belonging to an video stream.</p>
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* @param relativeIndex <p>The relative index of the video stream.</p>
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* @return <p>A SubtitleStream object.</p>
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* @throws NumberFormatException <p>If codec index contains a non-numeric value.</p>
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*/
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private static VideoStream parseVideoStream(String[] streamParts, int relativeIndex) throws NumberFormatException {
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String codec = null;
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int absoluteIndex = -1;
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for (String streamPart : streamParts) {
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if (streamPart.contains("codec_name=")) {
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codec = streamPart.replace("codec_name=", "");
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} else if (streamPart.contains("index=")) {
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absoluteIndex = Integer.parseInt(streamPart.replace("index=", ""));
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}
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}
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return new VideoStream(codec, absoluteIndex, relativeIndex);
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}
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/**
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* Parses a list of audio stream parameters to an audio stream object
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* @param streamParts <p>A list of parameters belonging to an audio stream.</p>
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* @param relativeIndex <p>The relative index of the audio stream.</p>
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* @return <p>A SubtitleStream object.</p>
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* @throws NumberFormatException <p>If codec index contains a non-numeric value.</p>
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*/
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private static AudioStream parseAudioStream(String[] streamParts, int relativeIndex) throws NumberFormatException {
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String codec = null;
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int absoluteIndex = -1;
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String language = null;
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int channels = 0;
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String title = "";
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for (String streamPart : streamParts) {
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if (streamPart.contains("codec_name=")) {
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codec = streamPart.replace("codec_name=", "");
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} else if (streamPart.contains("index=")) {
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absoluteIndex = Integer.parseInt(streamPart.replace("index=", ""));
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} else if (streamPart.contains("TAG:language=")) {
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language = streamPart.replace("TAG:language=", "");
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} else if (streamPart.contains("channels=")) {
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channels = Integer.parseInt(streamPart.replace("channels=", ""));
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} else if (streamPart.contains("TAG:title=")) {
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title = streamPart.replace("TAG:title=", "");
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}
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}
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return new AudioStream(codec, absoluteIndex, relativeIndex, language, title, channels);
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}
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/**
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* Parses a list of subtitle stream parameters to a subtitle stream object
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* @param streamParts <p>A list of parameters belonging to a subtitle stream.</p>
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* @param relativeIndex <p>The relative index of the subtitle.</p>
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* @return <p>A SubtitleStream object.</p>
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* @throws NumberFormatException <p>If codec index contains a non-numeric value.</p>
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*/
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private static SubtitleStream parseSubtitleStream(String[] streamParts, int relativeIndex)
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throws NumberFormatException {
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String codecName = null;
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int absoluteIndex = -1;
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String language = null;
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String title = "";
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for (String streamPart : streamParts) {
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if (streamPart.contains("codec_name=")) {
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codecName = streamPart.replace("codec_name=", "");
|
||||
} else if (streamPart.contains("index=")) {
|
||||
absoluteIndex = Integer.parseInt(streamPart.replace("index=", ""));
|
||||
} else if (streamPart.contains("TAG:language=")) {
|
||||
language = streamPart.replace("TAG:language=", "");
|
||||
} else if (streamPart.contains("TAG:title=")) {
|
||||
title = streamPart.replace("TAG:title=", "");
|
||||
}
|
||||
}
|
||||
return new SubtitleStream(codecName, absoluteIndex, relativeIndex, language, title);
|
||||
}
|
||||
|
||||
/**
|
||||
* Escapes special characters which can cause trouble for ffmpeg
|
||||
* @param fileName <p>The filename to escape.</p>
|
||||
* @return <p>A filename with known special characters escaped.</p>
|
||||
*/
|
||||
static String escapeSpecialCharactersInFileName(String fileName) {
|
||||
return fileName.replace("'", "\\\\\\'")
|
||||
.replace(",", "\\\\\\,")
|
||||
.replace(";", "\\;")
|
||||
.replace("]", "\\]")
|
||||
.replace("[", "\\[");
|
||||
}
|
||||
|
||||
/**
|
||||
* Prints something to the commandline efficiently
|
||||
* @param input <p>The text to print.</p>
|
||||
* @throws IOException <p>If a write is not possible.</p>
|
||||
*/
|
||||
private static void print(String input) throws IOException {
|
||||
if (!input.equals("")) {
|
||||
writer.write(input);
|
||||
writer.flush();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Prints something and a newline to the commandline efficiently
|
||||
* @param input <p>The text to print.</p>
|
||||
* @throws IOException <p>If a write is not possible.</p>
|
||||
*/
|
||||
static void printl(String input) throws IOException {
|
||||
if (!input.equals("")) {
|
||||
writer.write(input);
|
||||
}
|
||||
printl();
|
||||
}
|
||||
|
||||
/**
|
||||
* Prints a newline
|
||||
* @throws IOException <p>If a write is not possible.</p>
|
||||
*/
|
||||
static void printl() throws IOException {
|
||||
writer.newLine();
|
||||
writer.flush();
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks whether there exists an external image subtitle with the same filename as the file
|
||||
* @param directory <p>The directory containing the file.</p>
|
||||
* @param file <p>The file to be converted.</p>
|
||||
* @return <p>The extension of the subtitle or empty if no subtitle was found.</p>
|
||||
*/
|
||||
String hasExternalImageSubtitle(String directory, String file) {
|
||||
String path = stripExtension(file);
|
||||
for (String subtitleExtension : new String[] {".idx", ".sub"}) {
|
||||
if (new File(directory + File.separator + path + subtitleExtension).exists()) {
|
||||
return path + subtitleExtension;
|
||||
}
|
||||
}
|
||||
return "";
|
||||
}
|
||||
|
||||
/**
|
||||
* Checks whether there exists an external subtitle with the same filename as the file
|
||||
* @param directory <p>The directory containing the file.</p>
|
||||
* @param file <p>The file to be converted.</p>
|
||||
* @return <p>The extension of the subtitle or empty if no subtitle was found.</p>
|
||||
*/
|
||||
String hasExternalSubtitle(String directory, String file) {
|
||||
String path = stripExtension(file);
|
||||
for (String subtitleExtension : new String[] {".srt", ".ass"}) {
|
||||
System.out.println(directory + File.separator + path + subtitleExtension);
|
||||
if (new File(directory + File.separator + path + subtitleExtension).exists()) {
|
||||
return path + subtitleExtension;
|
||||
}
|
||||
}
|
||||
return "";
|
||||
}
|
||||
void convert(File file) throws IOException;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user