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package gregtech.client;
import java.net.URL;
import javax.sound.sampled.AudioFormat;
import net.minecraft.util.ResourceLocation;
import org.apache.commons.lang3.StringUtils;
import paulscode.sound.SoundBuffer;
import paulscode.sound.codecs.CodecJOrbis;
/**
* A somewhat hacky codec that allows starting music playback from the middle of a Ogg Vorbis file.
* Registers for URLs of the form: {@literal jar:blah/blah.jar!blah/music.ogg?seek_ms=5000&ext=.gt5oggseek}
*/
public class SeekingOggCodec extends CodecJOrbis {
public static final String EXTENSION = "gt5oggseek";
private volatile boolean fullyInitialized = false;
private volatile SoundBuffer nextBuffer = null;
/**
* Encodes the given millisecond seek amount into a URL/resource name suffix that can be appended to the sound path
* to start playing from that point onwards.
*/
public static String getEncodedSeekSuffxix(long milliseconds) {
return String.format("?seek_ms=%d&ext=." + EXTENSION, milliseconds);
}
/**
* @return The given path with the seeking metadata stripped from the URL
*/
public static String stripSeekMetadata(String path) {
while (path.endsWith("." + EXTENSION)) {
int qMark = path.lastIndexOf('?');
if (qMark == -1) {
break;
}
path = path.substring(0, qMark);
}
return path;
}
/**
* Turns the input sound ResourceLocation into one that is seeked forward the given number of milliseconds
*/
public static ResourceLocation seekResource(ResourceLocation loc, long milliseconds) {
String original = loc.getResourcePath();
original = stripSeekMetadata(original);
return new ResourceLocation(loc.getResourceDomain(), original + getEncodedSeekSuffxix(milliseconds));
}
@Override
public boolean initialize(URL url) {
final String textUrl = url.toString();
final String[] queryParts = url.getQuery()
.split("&");
long seekMs = 0;
for (String part : queryParts) {
if (!part.startsWith("seek_ms=")) {
continue;
}
part = StringUtils.removeStart(part, "seek_ms=");
seekMs = Long.parseLong(part);
}
if (!super.initialize(url)) {
return false;
}
final AudioFormat format = this.getAudioFormat();
final long samplesPerS = (long) format.getSampleRate();
final int bytesPerSample = (format.getChannels() * format.getSampleSizeInBits() / 8);
long remainingBytes = seekMs * samplesPerS * bytesPerSample / 1000L;
while (remainingBytes > 0) {
final SoundBuffer buf = read();
if (buf == null || buf.audioData == null) {
return false;
}
remainingBytes -= buf.audioData.length;
}
synchronized (this) {
fullyInitialized = true;
}
return true;
}
@Override
public synchronized boolean initialized() {
return fullyInitialized;
}
}
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