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/*
* Copyright (C) 2014 The CyanogenMod Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.cyanogenmod.eleven.utils;
import android.text.TextUtils;
import android.util.Log;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class SrtParser {
private static final String TAG = SrtParser.class.getSimpleName();
public static class SrtEntry {
public long mStartTimeMs;
public long mEndTimeMs;
String mLine;
}
/**
* The SubRip file format should contain entries that follow the following format:
*
* 1. A numeric counter identifying each sequential subtitle
* 2. The time that the subtitle should appear on the screen, followed by --> and the time it
* should disappear
* 3. Subtitle text itself on one or more lines
* 4. A blank line containing no text, indicating the end of this subtitle
*
* The timecode format should be hours:minutes:seconds,milliseconds with time units fixed to two
* zero-padded digits and fractions fixed to three zero-padded digits (00:00:00,000).
*/
public static ArrayList<SrtEntry> getSrtEntries(File f) {
ArrayList<SrtEntry> ret = null;
FileReader reader = null;
BufferedReader br = null;
try {
reader = new FileReader(f);
br = new BufferedReader(reader);
String header;
// since we don't really care about the 1st line of each entry (the # val) then read
// and discard it
while ((header = br.readLine()) != null) {
// discard subtitle number
header = br.readLine();
if (header == null) {
break;
}
SrtEntry entry = new SrtEntry();
String[] startEnd = header.split("-->");
entry.mStartTimeMs = parseMs(startEnd[0]);
entry.mEndTimeMs = parseMs(startEnd[1]);
StringBuilder subtitleBuilder = new StringBuilder("");
String s = br.readLine();
if (!TextUtils.isEmpty(s)) {
subtitleBuilder.append(s);
while (!((s = br.readLine()) == null || s.trim().equals(""))) {
subtitleBuilder.append("\n").append(s);
}
}
entry.mLine = subtitleBuilder.toString();
if (ret == null) {
ret = new ArrayList<SrtEntry>();
}
ret.add(entry);
}
} catch (NumberFormatException nfe) {
// The file isn't a valid srt format
Log.e(TAG, nfe.getMessage(), nfe);
ret = null;
} catch (IOException ioe) {
// shouldn't happen
Log.e(TAG, ioe.getMessage(), ioe);
ret = null;
} catch (ArrayIndexOutOfBoundsException e) {
// if the time is malformed
Log.e(TAG, e.getMessage());
ret = null;
} finally {
if (br != null) {
try {
br.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
}
}
}
return ret;
}
private static long parseMs(String in) {
String[] timeArray = in.split(":");
long hours = Long.parseLong(timeArray[0].trim());
long minutes = Long.parseLong(timeArray[1].trim());
String[] secondTimeArray = timeArray[2].split(",");
long seconds = Long.parseLong(secondTimeArray[0].trim());
long millies = Long.parseLong(secondTimeArray[1].trim());
return hours * 60 * 60 * 1000 + minutes * 60 * 1000 + seconds * 1000 + millies;
}
}
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