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DashManifestParser.java
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DashManifestParser.java
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/*
* Copyright (C) 2016 The Android Open Source 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.google.android.exoplayer2.source.dash.manifest;
import android.net.Uri;
import android.text.TextUtils;
import android.util.Base64;
import android.util.Pair;
import android.util.Xml;
import androidx.annotation.Nullable;
import com.google.android.exoplayer2.C;
import com.google.android.exoplayer2.Format;
import com.google.android.exoplayer2.ParserException;
import com.google.android.exoplayer2.drm.DrmInitData;
import com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
import com.google.android.exoplayer2.extractor.mp4.PsshAtomUtil;
import com.google.android.exoplayer2.metadata.emsg.EventMessage;
import com.google.android.exoplayer2.source.dash.manifest.SegmentBase.SegmentList;
import com.google.android.exoplayer2.source.dash.manifest.SegmentBase.SegmentTemplate;
import com.google.android.exoplayer2.source.dash.manifest.SegmentBase.SegmentTimelineElement;
import com.google.android.exoplayer2.source.dash.manifest.SegmentBase.SingleSegmentBase;
import com.google.android.exoplayer2.upstream.ParsingLoadable;
import com.google.android.exoplayer2.util.Assertions;
import com.google.android.exoplayer2.util.Log;
import com.google.android.exoplayer2.util.MimeTypes;
import com.google.android.exoplayer2.util.UriUtil;
import com.google.android.exoplayer2.util.Util;
import com.google.android.exoplayer2.util.XmlPullParserUtil;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.checkerframework.checker.nullness.compatqual.NullableType;
import org.xml.sax.helpers.DefaultHandler;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlSerializer;
/**
* A parser of media presentation description files.
*/
public class DashManifestParser extends DefaultHandler
implements ParsingLoadable.Parser<DashManifest> {
private static final String TAG = "MpdParser";
private static final Pattern FRAME_RATE_PATTERN = Pattern.compile("(\\d+)(?:/(\\d+))?");
private static final Pattern CEA_608_ACCESSIBILITY_PATTERN = Pattern.compile("CC([1-4])=.*");
private static final Pattern CEA_708_ACCESSIBILITY_PATTERN =
Pattern.compile("([1-9]|[1-5][0-9]|6[0-3])=.*");
private final XmlPullParserFactory xmlParserFactory;
public DashManifestParser() {
try {
xmlParserFactory = XmlPullParserFactory.newInstance();
} catch (XmlPullParserException e) {
throw new RuntimeException("Couldn't create XmlPullParserFactory instance", e);
}
}
// MPD parsing.
@Override
public DashManifest parse(Uri uri, InputStream inputStream) throws IOException {
try {
XmlPullParser xpp = xmlParserFactory.newPullParser();
xpp.setInput(inputStream, null);
int eventType = xpp.next();
if (eventType != XmlPullParser.START_TAG || !"MPD".equals(xpp.getName())) {
throw new ParserException(
"inputStream does not contain a valid media presentation description");
}
return parseMediaPresentationDescription(xpp, uri.toString());
} catch (XmlPullParserException e) {
throw new ParserException(e);
}
}
protected DashManifest parseMediaPresentationDescription(XmlPullParser xpp,
String baseUrl) throws XmlPullParserException, IOException {
long availabilityStartTime = parseDateTime(xpp, "availabilityStartTime", C.TIME_UNSET);
long durationMs = parseDuration(xpp, "mediaPresentationDuration", C.TIME_UNSET);
long minBufferTimeMs = parseDuration(xpp, "minBufferTime", C.TIME_UNSET);
String typeString = xpp.getAttributeValue(null, "type");
boolean dynamic = "dynamic".equals(typeString);
long minUpdateTimeMs = dynamic ? parseDuration(xpp, "minimumUpdatePeriod", C.TIME_UNSET)
: C.TIME_UNSET;
long timeShiftBufferDepthMs = dynamic
? parseDuration(xpp, "timeShiftBufferDepth", C.TIME_UNSET) : C.TIME_UNSET;
long suggestedPresentationDelayMs = dynamic
? parseDuration(xpp, "suggestedPresentationDelay", C.TIME_UNSET) : C.TIME_UNSET;
long publishTimeMs = parseDateTime(xpp, "publishTime", C.TIME_UNSET);
ProgramInformation programInformation = null;
UtcTimingElement utcTiming = null;
Uri location = null;
List<Period> periods = new ArrayList<>();
long nextPeriodStartMs = dynamic ? C.TIME_UNSET : 0;
boolean seenEarlyAccessPeriod = false;
boolean seenFirstBaseUrl = false;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "BaseURL")) {
if (!seenFirstBaseUrl) {
baseUrl = parseBaseUrl(xpp, baseUrl);
seenFirstBaseUrl = true;
}
} else if (XmlPullParserUtil.isStartTag(xpp, "ProgramInformation")) {
programInformation = parseProgramInformation(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "UTCTiming")) {
utcTiming = parseUtcTiming(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "Location")) {
location = Uri.parse(xpp.nextText());
} else if (XmlPullParserUtil.isStartTag(xpp, "Period") && !seenEarlyAccessPeriod) {
Pair<Period, Long> periodWithDurationMs = parsePeriod(xpp, baseUrl, nextPeriodStartMs);
Period period = periodWithDurationMs.first;
if (period.startMs == C.TIME_UNSET) {
if (dynamic) {
// This is an early access period. Ignore it. All subsequent periods must also be
// early access.
seenEarlyAccessPeriod = true;
} else {
throw new ParserException("Unable to determine start of period " + periods.size());
}
} else {
long periodDurationMs = periodWithDurationMs.second;
nextPeriodStartMs = periodDurationMs == C.TIME_UNSET ? C.TIME_UNSET
: (period.startMs + periodDurationMs);
periods.add(period);
}
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "MPD"));
if (durationMs == C.TIME_UNSET) {
if (nextPeriodStartMs != C.TIME_UNSET) {
// If we know the end time of the final period, we can use it as the duration.
durationMs = nextPeriodStartMs;
} else if (!dynamic) {
throw new ParserException("Unable to determine duration of static manifest.");
}
}
if (periods.isEmpty()) {
throw new ParserException("No periods found.");
}
return buildMediaPresentationDescription(
availabilityStartTime,
durationMs,
minBufferTimeMs,
dynamic,
minUpdateTimeMs,
timeShiftBufferDepthMs,
suggestedPresentationDelayMs,
publishTimeMs,
programInformation,
utcTiming,
location,
periods);
}
protected DashManifest buildMediaPresentationDescription(
long availabilityStartTime,
long durationMs,
long minBufferTimeMs,
boolean dynamic,
long minUpdateTimeMs,
long timeShiftBufferDepthMs,
long suggestedPresentationDelayMs,
long publishTimeMs,
@Nullable ProgramInformation programInformation,
@Nullable UtcTimingElement utcTiming,
@Nullable Uri location,
List<Period> periods) {
return new DashManifest(
availabilityStartTime,
durationMs,
minBufferTimeMs,
dynamic,
minUpdateTimeMs,
timeShiftBufferDepthMs,
suggestedPresentationDelayMs,
publishTimeMs,
programInformation,
utcTiming,
location,
periods);
}
protected UtcTimingElement parseUtcTiming(XmlPullParser xpp) {
String schemeIdUri = xpp.getAttributeValue(null, "schemeIdUri");
String value = xpp.getAttributeValue(null, "value");
return buildUtcTimingElement(schemeIdUri, value);
}
protected UtcTimingElement buildUtcTimingElement(String schemeIdUri, String value) {
return new UtcTimingElement(schemeIdUri, value);
}
protected Pair<Period, Long> parsePeriod(XmlPullParser xpp, String baseUrl, long defaultStartMs)
throws XmlPullParserException, IOException {
@Nullable String id = xpp.getAttributeValue(null, "id");
long startMs = parseDuration(xpp, "start", defaultStartMs);
long durationMs = parseDuration(xpp, "duration", C.TIME_UNSET);
@Nullable SegmentBase segmentBase = null;
@Nullable Descriptor assetIdentifier = null;
List<AdaptationSet> adaptationSets = new ArrayList<>();
List<EventStream> eventStreams = new ArrayList<>();
boolean seenFirstBaseUrl = false;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "BaseURL")) {
if (!seenFirstBaseUrl) {
baseUrl = parseBaseUrl(xpp, baseUrl);
seenFirstBaseUrl = true;
}
} else if (XmlPullParserUtil.isStartTag(xpp, "AdaptationSet")) {
adaptationSets.add(parseAdaptationSet(xpp, baseUrl, segmentBase, durationMs));
} else if (XmlPullParserUtil.isStartTag(xpp, "EventStream")) {
eventStreams.add(parseEventStream(xpp));
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentBase")) {
segmentBase = parseSegmentBase(xpp, null);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentList")) {
segmentBase = parseSegmentList(xpp, null, durationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTemplate")) {
segmentBase = parseSegmentTemplate(xpp, null, Collections.emptyList(), durationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "AssetIdentifier")) {
assetIdentifier = parseDescriptor(xpp, "AssetIdentifier");
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "Period"));
return Pair.create(
buildPeriod(id, startMs, adaptationSets, eventStreams, assetIdentifier), durationMs);
}
protected Period buildPeriod(
@Nullable String id,
long startMs,
List<AdaptationSet> adaptationSets,
List<EventStream> eventStreams,
@Nullable Descriptor assetIdentifier) {
return new Period(id, startMs, adaptationSets, eventStreams, assetIdentifier);
}
// AdaptationSet parsing.
protected AdaptationSet parseAdaptationSet(
XmlPullParser xpp, String baseUrl, @Nullable SegmentBase segmentBase, long periodDurationMs)
throws XmlPullParserException, IOException {
int id = parseInt(xpp, "id", AdaptationSet.ID_UNSET);
int contentType = parseContentType(xpp);
String mimeType = xpp.getAttributeValue(null, "mimeType");
String codecs = xpp.getAttributeValue(null, "codecs");
int width = parseInt(xpp, "width", Format.NO_VALUE);
int height = parseInt(xpp, "height", Format.NO_VALUE);
float frameRate = parseFrameRate(xpp, Format.NO_VALUE);
int audioChannels = Format.NO_VALUE;
int audioSamplingRate = parseInt(xpp, "audioSamplingRate", Format.NO_VALUE);
String language = xpp.getAttributeValue(null, "lang");
String label = xpp.getAttributeValue(null, "label");
String drmSchemeType = null;
ArrayList<SchemeData> drmSchemeDatas = new ArrayList<>();
ArrayList<Descriptor> inbandEventStreams = new ArrayList<>();
ArrayList<Descriptor> accessibilityDescriptors = new ArrayList<>();
ArrayList<Descriptor> roleDescriptors = new ArrayList<>();
ArrayList<Descriptor> essentialProperties = new ArrayList<>();
ArrayList<Descriptor> supplementalProperties = new ArrayList<>();
List<RepresentationInfo> representationInfos = new ArrayList<>();
boolean seenFirstBaseUrl = false;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "BaseURL")) {
if (!seenFirstBaseUrl) {
baseUrl = parseBaseUrl(xpp, baseUrl);
seenFirstBaseUrl = true;
}
} else if (XmlPullParserUtil.isStartTag(xpp, "ContentProtection")) {
Pair<String, SchemeData> contentProtection = parseContentProtection(xpp);
if (contentProtection.first != null) {
drmSchemeType = contentProtection.first;
}
if (contentProtection.second != null) {
drmSchemeDatas.add(contentProtection.second);
}
} else if (XmlPullParserUtil.isStartTag(xpp, "ContentComponent")) {
language = checkLanguageConsistency(language, xpp.getAttributeValue(null, "lang"));
contentType = checkContentTypeConsistency(contentType, parseContentType(xpp));
} else if (XmlPullParserUtil.isStartTag(xpp, "Role")) {
roleDescriptors.add(parseDescriptor(xpp, "Role"));
} else if (XmlPullParserUtil.isStartTag(xpp, "AudioChannelConfiguration")) {
audioChannels = parseAudioChannelConfiguration(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "Accessibility")) {
accessibilityDescriptors.add(parseDescriptor(xpp, "Accessibility"));
} else if (XmlPullParserUtil.isStartTag(xpp, "EssentialProperty")) {
essentialProperties.add(parseDescriptor(xpp, "EssentialProperty"));
} else if (XmlPullParserUtil.isStartTag(xpp, "SupplementalProperty")) {
supplementalProperties.add(parseDescriptor(xpp, "SupplementalProperty"));
} else if (XmlPullParserUtil.isStartTag(xpp, "Representation")) {
RepresentationInfo representationInfo =
parseRepresentation(
xpp,
baseUrl,
mimeType,
codecs,
width,
height,
frameRate,
audioChannels,
audioSamplingRate,
language,
roleDescriptors,
accessibilityDescriptors,
essentialProperties,
supplementalProperties,
segmentBase,
periodDurationMs);
contentType =
checkContentTypeConsistency(
contentType, MimeTypes.getTrackType(representationInfo.format.sampleMimeType));
representationInfos.add(representationInfo);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentBase")) {
segmentBase = parseSegmentBase(xpp, (SingleSegmentBase) segmentBase);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentList")) {
segmentBase = parseSegmentList(xpp, (SegmentList) segmentBase, periodDurationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTemplate")) {
segmentBase =
parseSegmentTemplate(
xpp, (SegmentTemplate) segmentBase, supplementalProperties, periodDurationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "InbandEventStream")) {
inbandEventStreams.add(parseDescriptor(xpp, "InbandEventStream"));
} else if (XmlPullParserUtil.isStartTag(xpp, "Label")) {
label = parseLabel(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp)) {
parseAdaptationSetChild(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "AdaptationSet"));
// Build the representations.
List<Representation> representations = new ArrayList<>(representationInfos.size());
for (int i = 0; i < representationInfos.size(); i++) {
representations.add(
buildRepresentation(
representationInfos.get(i),
label,
drmSchemeType,
drmSchemeDatas,
inbandEventStreams));
}
return buildAdaptationSet(
id,
contentType,
representations,
accessibilityDescriptors,
essentialProperties,
supplementalProperties);
}
protected AdaptationSet buildAdaptationSet(
int id,
int contentType,
List<Representation> representations,
List<Descriptor> accessibilityDescriptors,
List<Descriptor> essentialProperties,
List<Descriptor> supplementalProperties) {
return new AdaptationSet(
id,
contentType,
representations,
accessibilityDescriptors,
essentialProperties,
supplementalProperties);
}
protected int parseContentType(XmlPullParser xpp) {
String contentType = xpp.getAttributeValue(null, "contentType");
return TextUtils.isEmpty(contentType) ? C.TRACK_TYPE_UNKNOWN
: MimeTypes.BASE_TYPE_AUDIO.equals(contentType) ? C.TRACK_TYPE_AUDIO
: MimeTypes.BASE_TYPE_VIDEO.equals(contentType) ? C.TRACK_TYPE_VIDEO
: MimeTypes.BASE_TYPE_TEXT.equals(contentType) ? C.TRACK_TYPE_TEXT
: C.TRACK_TYPE_UNKNOWN;
}
/**
* Parses a ContentProtection element.
*
* @param xpp The parser from which to read.
* @throws XmlPullParserException If an error occurs parsing the element.
* @throws IOException If an error occurs reading the element.
* @return The scheme type and/or {@link SchemeData} parsed from the ContentProtection element.
* Either or both may be null, depending on the ContentProtection element being parsed.
*/
protected Pair<@NullableType String, @NullableType SchemeData> parseContentProtection(
XmlPullParser xpp) throws XmlPullParserException, IOException {
String schemeType = null;
String licenseServerUrl = null;
byte[] data = null;
UUID uuid = null;
String schemeIdUri = xpp.getAttributeValue(null, "schemeIdUri");
if (schemeIdUri != null) {
switch (Util.toLowerInvariant(schemeIdUri)) {
case "urn:mpeg:dash:mp4protection:2011":
schemeType = xpp.getAttributeValue(null, "value");
String defaultKid = XmlPullParserUtil.getAttributeValueIgnorePrefix(xpp, "default_KID");
if (!TextUtils.isEmpty(defaultKid)
&& !"00000000-0000-0000-0000-000000000000".equals(defaultKid)) {
String[] defaultKidStrings = defaultKid.split("\\s+");
UUID[] defaultKids = new UUID[defaultKidStrings.length];
for (int i = 0; i < defaultKidStrings.length; i++) {
defaultKids[i] = UUID.fromString(defaultKidStrings[i]);
}
data = PsshAtomUtil.buildPsshAtom(C.COMMON_PSSH_UUID, defaultKids, null);
uuid = C.COMMON_PSSH_UUID;
}
break;
case "urn:uuid:9a04f079-9840-4286-ab92-e65be0885f95":
uuid = C.PLAYREADY_UUID;
break;
case "urn:uuid:edef8ba9-79d6-4ace-a3c8-27dcd51d21ed":
uuid = C.WIDEVINE_UUID;
break;
default:
break;
}
}
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "ms:laurl")) {
licenseServerUrl = xpp.getAttributeValue(null, "licenseUrl");
} else if (data == null
&& XmlPullParserUtil.isStartTagIgnorePrefix(xpp, "pssh")
&& xpp.next() == XmlPullParser.TEXT) {
// The cenc:pssh element is defined in 23001-7:2015.
data = Base64.decode(xpp.getText(), Base64.DEFAULT);
uuid = PsshAtomUtil.parseUuid(data);
if (uuid == null) {
Log.w(TAG, "Skipping malformed cenc:pssh data");
data = null;
}
} else if (data == null
&& C.PLAYREADY_UUID.equals(uuid)
&& XmlPullParserUtil.isStartTag(xpp, "mspr:pro")
&& xpp.next() == XmlPullParser.TEXT) {
// The mspr:pro element is defined in DASH Content Protection using Microsoft PlayReady.
data =
PsshAtomUtil.buildPsshAtom(
C.PLAYREADY_UUID, Base64.decode(xpp.getText(), Base64.DEFAULT));
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "ContentProtection"));
SchemeData schemeData =
uuid != null ? new SchemeData(uuid, licenseServerUrl, MimeTypes.VIDEO_MP4, data) : null;
return Pair.create(schemeType, schemeData);
}
/**
* Parses children of AdaptationSet elements not specifically parsed elsewhere.
*
* @param xpp The XmpPullParser from which the AdaptationSet child should be parsed.
* @throws XmlPullParserException If an error occurs parsing the element.
* @throws IOException If an error occurs reading the element.
*/
protected void parseAdaptationSetChild(XmlPullParser xpp)
throws XmlPullParserException, IOException {
maybeSkipTag(xpp);
}
// Representation parsing.
protected RepresentationInfo parseRepresentation(
XmlPullParser xpp,
String baseUrl,
@Nullable String adaptationSetMimeType,
@Nullable String adaptationSetCodecs,
int adaptationSetWidth,
int adaptationSetHeight,
float adaptationSetFrameRate,
int adaptationSetAudioChannels,
int adaptationSetAudioSamplingRate,
@Nullable String adaptationSetLanguage,
List<Descriptor> adaptationSetRoleDescriptors,
List<Descriptor> adaptationSetAccessibilityDescriptors,
List<Descriptor> adaptationSetEssentialProperties,
List<Descriptor> adaptationSetSupplementalProperties,
@Nullable SegmentBase segmentBase,
long periodDurationMs)
throws XmlPullParserException, IOException {
String id = xpp.getAttributeValue(null, "id");
int bandwidth = parseInt(xpp, "bandwidth", Format.NO_VALUE);
String mimeType = parseString(xpp, "mimeType", adaptationSetMimeType);
String codecs = parseString(xpp, "codecs", adaptationSetCodecs);
int width = parseInt(xpp, "width", adaptationSetWidth);
int height = parseInt(xpp, "height", adaptationSetHeight);
float frameRate = parseFrameRate(xpp, adaptationSetFrameRate);
int audioChannels = adaptationSetAudioChannels;
int audioSamplingRate = parseInt(xpp, "audioSamplingRate", adaptationSetAudioSamplingRate);
String drmSchemeType = null;
ArrayList<SchemeData> drmSchemeDatas = new ArrayList<>();
ArrayList<Descriptor> inbandEventStreams = new ArrayList<>();
ArrayList<Descriptor> essentialProperties = new ArrayList<>(adaptationSetEssentialProperties);
ArrayList<Descriptor> supplementalProperties =
new ArrayList<>(adaptationSetSupplementalProperties);
boolean seenFirstBaseUrl = false;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "BaseURL")) {
if (!seenFirstBaseUrl) {
baseUrl = parseBaseUrl(xpp, baseUrl);
seenFirstBaseUrl = true;
}
} else if (XmlPullParserUtil.isStartTag(xpp, "AudioChannelConfiguration")) {
audioChannels = parseAudioChannelConfiguration(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentBase")) {
segmentBase = parseSegmentBase(xpp, (SingleSegmentBase) segmentBase);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentList")) {
segmentBase = parseSegmentList(xpp, (SegmentList) segmentBase, periodDurationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTemplate")) {
segmentBase =
parseSegmentTemplate(
xpp,
(SegmentTemplate) segmentBase,
adaptationSetSupplementalProperties,
periodDurationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "ContentProtection")) {
Pair<String, SchemeData> contentProtection = parseContentProtection(xpp);
if (contentProtection.first != null) {
drmSchemeType = contentProtection.first;
}
if (contentProtection.second != null) {
drmSchemeDatas.add(contentProtection.second);
}
} else if (XmlPullParserUtil.isStartTag(xpp, "InbandEventStream")) {
inbandEventStreams.add(parseDescriptor(xpp, "InbandEventStream"));
} else if (XmlPullParserUtil.isStartTag(xpp, "EssentialProperty")) {
essentialProperties.add(parseDescriptor(xpp, "EssentialProperty"));
} else if (XmlPullParserUtil.isStartTag(xpp, "SupplementalProperty")) {
supplementalProperties.add(parseDescriptor(xpp, "SupplementalProperty"));
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "Representation"));
Format format =
buildFormat(
id,
mimeType,
width,
height,
frameRate,
audioChannels,
audioSamplingRate,
bandwidth,
adaptationSetLanguage,
adaptationSetRoleDescriptors,
adaptationSetAccessibilityDescriptors,
codecs,
essentialProperties,
supplementalProperties);
segmentBase = segmentBase != null ? segmentBase : new SingleSegmentBase();
return new RepresentationInfo(format, baseUrl, segmentBase, drmSchemeType, drmSchemeDatas,
inbandEventStreams, Representation.REVISION_ID_DEFAULT);
}
protected Format buildFormat(
@Nullable String id,
@Nullable String containerMimeType,
int width,
int height,
float frameRate,
int audioChannels,
int audioSamplingRate,
int bitrate,
@Nullable String language,
List<Descriptor> roleDescriptors,
List<Descriptor> accessibilityDescriptors,
@Nullable String codecs,
List<Descriptor> essentialProperties,
List<Descriptor> supplementalProperties) {
@Nullable String sampleMimeType = getSampleMimeType(containerMimeType, codecs);
if (MimeTypes.AUDIO_E_AC3.equals(sampleMimeType)) {
sampleMimeType = parseEac3SupplementalProperties(supplementalProperties);
}
@C.SelectionFlags int selectionFlags = parseSelectionFlagsFromRoleDescriptors(roleDescriptors);
@C.RoleFlags int roleFlags = parseRoleFlagsFromRoleDescriptors(roleDescriptors);
roleFlags |= parseRoleFlagsFromAccessibilityDescriptors(accessibilityDescriptors);
roleFlags |= parseRoleFlagsFromProperties(essentialProperties);
roleFlags |= parseRoleFlagsFromProperties(supplementalProperties);
Format.Builder formatBuilder =
new Format.Builder()
.setId(id)
.setContainerMimeType(containerMimeType)
.setSampleMimeType(sampleMimeType)
.setCodecs(codecs)
.setPeakBitrate(bitrate)
.setSelectionFlags(selectionFlags)
.setRoleFlags(roleFlags)
.setLanguage(language);
if (MimeTypes.isVideo(sampleMimeType)) {
formatBuilder.setWidth(width).setHeight(height).setFrameRate(frameRate);
} else if (MimeTypes.isAudio(sampleMimeType)) {
formatBuilder.setChannelCount(audioChannels).setSampleRate(audioSamplingRate);
} else if (MimeTypes.isText(sampleMimeType)) {
int accessibilityChannel = Format.NO_VALUE;
if (MimeTypes.APPLICATION_CEA608.equals(sampleMimeType)) {
accessibilityChannel = parseCea608AccessibilityChannel(accessibilityDescriptors);
} else if (MimeTypes.APPLICATION_CEA708.equals(sampleMimeType)) {
accessibilityChannel = parseCea708AccessibilityChannel(accessibilityDescriptors);
}
formatBuilder.setAccessibilityChannel(accessibilityChannel);
}
return formatBuilder.build();
}
protected Representation buildRepresentation(
RepresentationInfo representationInfo,
@Nullable String label,
@Nullable String extraDrmSchemeType,
ArrayList<SchemeData> extraDrmSchemeDatas,
ArrayList<Descriptor> extraInbandEventStreams) {
Format.Builder formatBuilder = representationInfo.format.buildUpon();
if (label != null) {
formatBuilder.setLabel(label);
}
@Nullable String drmSchemeType = representationInfo.drmSchemeType;
if (drmSchemeType == null) {
drmSchemeType = extraDrmSchemeType;
}
ArrayList<SchemeData> drmSchemeDatas = representationInfo.drmSchemeDatas;
drmSchemeDatas.addAll(extraDrmSchemeDatas);
if (!drmSchemeDatas.isEmpty()) {
filterRedundantIncompleteSchemeDatas(drmSchemeDatas);
formatBuilder.setDrmInitData(new DrmInitData(drmSchemeType, drmSchemeDatas));
}
ArrayList<Descriptor> inbandEventStreams = representationInfo.inbandEventStreams;
inbandEventStreams.addAll(extraInbandEventStreams);
return Representation.newInstance(
representationInfo.revisionId,
formatBuilder.build(),
representationInfo.baseUrl,
representationInfo.segmentBase,
inbandEventStreams);
}
// SegmentBase, SegmentList and SegmentTemplate parsing.
protected SingleSegmentBase parseSegmentBase(
XmlPullParser xpp, @Nullable SingleSegmentBase parent)
throws XmlPullParserException, IOException {
long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
parent != null ? parent.presentationTimeOffset : 0);
long indexStart = parent != null ? parent.indexStart : 0;
long indexLength = parent != null ? parent.indexLength : 0;
String indexRangeText = xpp.getAttributeValue(null, "indexRange");
if (indexRangeText != null) {
String[] indexRange = indexRangeText.split("-");
indexStart = Long.parseLong(indexRange[0]);
indexLength = Long.parseLong(indexRange[1]) - indexStart + 1;
}
@Nullable RangedUri initialization = parent != null ? parent.initialization : null;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "Initialization")) {
initialization = parseInitialization(xpp);
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "SegmentBase"));
return buildSingleSegmentBase(initialization, timescale, presentationTimeOffset, indexStart,
indexLength);
}
protected SingleSegmentBase buildSingleSegmentBase(RangedUri initialization, long timescale,
long presentationTimeOffset, long indexStart, long indexLength) {
return new SingleSegmentBase(initialization, timescale, presentationTimeOffset, indexStart,
indexLength);
}
protected SegmentList parseSegmentList(
XmlPullParser xpp, @Nullable SegmentList parent, long periodDurationMs)
throws XmlPullParserException, IOException {
long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
parent != null ? parent.presentationTimeOffset : 0);
long duration = parseLong(xpp, "duration", parent != null ? parent.duration : C.TIME_UNSET);
long startNumber = parseLong(xpp, "startNumber", parent != null ? parent.startNumber : 1);
RangedUri initialization = null;
List<SegmentTimelineElement> timeline = null;
List<RangedUri> segments = null;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "Initialization")) {
initialization = parseInitialization(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTimeline")) {
timeline = parseSegmentTimeline(xpp, timescale, periodDurationMs);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentURL")) {
if (segments == null) {
segments = new ArrayList<>();
}
segments.add(parseSegmentUrl(xpp));
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "SegmentList"));
if (parent != null) {
initialization = initialization != null ? initialization : parent.initialization;
timeline = timeline != null ? timeline : parent.segmentTimeline;
segments = segments != null ? segments : parent.mediaSegments;
}
return buildSegmentList(initialization, timescale, presentationTimeOffset,
startNumber, duration, timeline, segments);
}
protected SegmentList buildSegmentList(
RangedUri initialization,
long timescale,
long presentationTimeOffset,
long startNumber,
long duration,
@Nullable List<SegmentTimelineElement> timeline,
@Nullable List<RangedUri> segments) {
return new SegmentList(initialization, timescale, presentationTimeOffset,
startNumber, duration, timeline, segments);
}
protected SegmentTemplate parseSegmentTemplate(
XmlPullParser xpp,
@Nullable SegmentTemplate parent,
List<Descriptor> adaptationSetSupplementalProperties,
long periodDurationMs)
throws XmlPullParserException, IOException {
long timescale = parseLong(xpp, "timescale", parent != null ? parent.timescale : 1);
long presentationTimeOffset = parseLong(xpp, "presentationTimeOffset",
parent != null ? parent.presentationTimeOffset : 0);
long duration = parseLong(xpp, "duration", parent != null ? parent.duration : C.TIME_UNSET);
long startNumber = parseLong(xpp, "startNumber", parent != null ? parent.startNumber : 1);
long endNumber =
parseLastSegmentNumberSupplementalProperty(adaptationSetSupplementalProperties);
UrlTemplate mediaTemplate = parseUrlTemplate(xpp, "media",
parent != null ? parent.mediaTemplate : null);
UrlTemplate initializationTemplate = parseUrlTemplate(xpp, "initialization",
parent != null ? parent.initializationTemplate : null);
RangedUri initialization = null;
List<SegmentTimelineElement> timeline = null;
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "Initialization")) {
initialization = parseInitialization(xpp);
} else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTimeline")) {
timeline = parseSegmentTimeline(xpp, timescale, periodDurationMs);
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "SegmentTemplate"));
if (parent != null) {
initialization = initialization != null ? initialization : parent.initialization;
timeline = timeline != null ? timeline : parent.segmentTimeline;
}
return buildSegmentTemplate(
initialization,
timescale,
presentationTimeOffset,
startNumber,
endNumber,
duration,
timeline,
initializationTemplate,
mediaTemplate);
}
protected SegmentTemplate buildSegmentTemplate(
RangedUri initialization,
long timescale,
long presentationTimeOffset,
long startNumber,
long endNumber,
long duration,
List<SegmentTimelineElement> timeline,
@Nullable UrlTemplate initializationTemplate,
@Nullable UrlTemplate mediaTemplate) {
return new SegmentTemplate(
initialization,
timescale,
presentationTimeOffset,
startNumber,
endNumber,
duration,
timeline,
initializationTemplate,
mediaTemplate);
}
/**
* /**
* Parses a single EventStream node in the manifest.
* <p>
* @param xpp The current xml parser.
* @return The {@link EventStream} parsed from this EventStream node.
* @throws XmlPullParserException If there is any error parsing this node.
* @throws IOException If there is any error reading from the underlying input stream.
*/
protected EventStream parseEventStream(XmlPullParser xpp)
throws XmlPullParserException, IOException {
String schemeIdUri = parseString(xpp, "schemeIdUri", "");
String value = parseString(xpp, "value", "");
long timescale = parseLong(xpp, "timescale", 1);
List<Pair<Long, EventMessage>> eventMessages = new ArrayList<>();
ByteArrayOutputStream scratchOutputStream = new ByteArrayOutputStream(512);
do {
xpp.next();
if (XmlPullParserUtil.isStartTag(xpp, "Event")) {
Pair<Long, EventMessage> event =
parseEvent(xpp, schemeIdUri, value, timescale, scratchOutputStream);
eventMessages.add(event);
} else {
maybeSkipTag(xpp);
}
} while (!XmlPullParserUtil.isEndTag(xpp, "EventStream"));
long[] presentationTimesUs = new long[eventMessages.size()];
EventMessage[] events = new EventMessage[eventMessages.size()];
for (int i = 0; i < eventMessages.size(); i++) {
Pair<Long, EventMessage> event = eventMessages.get(i);
presentationTimesUs[i] = event.first;
events[i] = event.second;
}
return buildEventStream(schemeIdUri, value, timescale, presentationTimesUs, events);
}
protected EventStream buildEventStream(String schemeIdUri, String value, long timescale,
long[] presentationTimesUs, EventMessage[] events) {
return new EventStream(schemeIdUri, value, timescale, presentationTimesUs, events);
}
/**
* Parses a single Event node in the manifest.
*
* @param xpp The current xml parser.
* @param schemeIdUri The schemeIdUri of the parent EventStream.
* @param value The schemeIdUri of the parent EventStream.
* @param timescale The timescale of the parent EventStream.
* @param scratchOutputStream A {@link ByteArrayOutputStream} that is used when parsing event
* objects.
* @return A pair containing the node's presentation timestamp in microseconds and the parsed
* {@link EventMessage}.
* @throws XmlPullParserException If there is any error parsing this node.
* @throws IOException If there is any error reading from the underlying input stream.
*/
protected Pair<Long, EventMessage> parseEvent(
XmlPullParser xpp,
String schemeIdUri,
String value,
long timescale,
ByteArrayOutputStream scratchOutputStream)
throws IOException, XmlPullParserException {
long id = parseLong(xpp, "id", 0);
long duration = parseLong(xpp, "duration", C.TIME_UNSET);
long presentationTime = parseLong(xpp, "presentationTime", 0);
long durationMs = Util.scaleLargeTimestamp(duration, C.MILLIS_PER_SECOND, timescale);
long presentationTimesUs = Util.scaleLargeTimestamp(presentationTime, C.MICROS_PER_SECOND,
timescale);
String messageData = parseString(xpp, "messageData", null);
byte[] eventObject = parseEventObject(xpp, scratchOutputStream);
return Pair.create(
presentationTimesUs,
buildEvent(
schemeIdUri,
value,
id,
durationMs,
messageData == null ? eventObject : Util.getUtf8Bytes(messageData)));
}
/**
* Parses an event object.
*
* @param xpp The current xml parser.
* @param scratchOutputStream A {@link ByteArrayOutputStream} that's used when parsing the object.
* @return The serialized byte array.
* @throws XmlPullParserException If there is any error parsing this node.
* @throws IOException If there is any error reading from the underlying input stream.
*/
protected byte[] parseEventObject(XmlPullParser xpp, ByteArrayOutputStream scratchOutputStream)
throws XmlPullParserException, IOException {
scratchOutputStream.reset();
XmlSerializer xmlSerializer = Xml.newSerializer();
xmlSerializer.setOutput(scratchOutputStream, C.UTF8_NAME);
// Start reading everything between <Event> and </Event>, and serialize them into an Xml
// byte array.
xpp.nextToken();
while (!XmlPullParserUtil.isEndTag(xpp, "Event")) {
switch (xpp.getEventType()) {
case (XmlPullParser.START_DOCUMENT):
xmlSerializer.startDocument(null, false);
break;
case (XmlPullParser.END_DOCUMENT):
xmlSerializer.endDocument();
break;
case (XmlPullParser.START_TAG):
xmlSerializer.startTag(xpp.getNamespace(), xpp.getName());
for (int i = 0; i < xpp.getAttributeCount(); i++) {
xmlSerializer.attribute(xpp.getAttributeNamespace(i), xpp.getAttributeName(i),
xpp.getAttributeValue(i));
}
break;
case (XmlPullParser.END_TAG):
xmlSerializer.endTag(xpp.getNamespace(), xpp.getName());
break;
case (XmlPullParser.TEXT):
xmlSerializer.text(xpp.getText());
break;
case (XmlPullParser.CDSECT):
xmlSerializer.cdsect(xpp.getText());
break;
case (XmlPullParser.ENTITY_REF):
xmlSerializer.entityRef(xpp.getText());
break;
case (XmlPullParser.IGNORABLE_WHITESPACE):
xmlSerializer.ignorableWhitespace(xpp.getText());
break;
case (XmlPullParser.PROCESSING_INSTRUCTION):
xmlSerializer.processingInstruction(xpp.getText());
break;
case (XmlPullParser.COMMENT):
xmlSerializer.comment(xpp.getText());
break;
case (XmlPullParser.DOCDECL):
xmlSerializer.docdecl(xpp.getText());
break;
default: // fall out
}
xpp.nextToken();
}
xmlSerializer.flush();
return scratchOutputStream.toByteArray();
}
protected EventMessage buildEvent(
String schemeIdUri, String value, long id, long durationMs, byte[] messageData) {
return new EventMessage(schemeIdUri, value, durationMs, id, messageData);
}
protected List<SegmentTimelineElement> parseSegmentTimeline(
XmlPullParser xpp, long timescale, long periodDurationMs)
throws XmlPullParserException, IOException {
List<SegmentTimelineElement> segmentTimeline = new ArrayList<>();
long startTime = 0;
long elementDuration = C.TIME_UNSET;
int elementRepeatCount = 0;
boolean havePreviousTimelineElement = false;