Examples with Descriptor com.google.android.exoplayer2.source.dash.manifest.Descriptor used on opensource projects

Example 1 with Descriptor

use of com.google.android.exoplayer2.source.dash.manifest.Descriptor in project ExoPlayer by google.

the class DefaultTsPayloadReaderFactory method buildSeiReader.

/**
   * If {@link #FLAG_OVERRIDE_CAPTION_DESCRIPTORS} is set, returns a {@link SeiReader} for
   * {@link #closedCaptionFormats}. If unset, parses the PMT descriptor information and returns a
   * {@link SeiReader} for the declared formats, or {@link #closedCaptionFormats} if the descriptor
   * is not present.
   *
   * @param esInfo The {@link EsInfo} passed to {@link #createPayloadReader(int, EsInfo)}.
   * @return A {@link SeiReader} for closed caption tracks.
   */
private SeiReader buildSeiReader(EsInfo esInfo) {
    if (isSet(FLAG_OVERRIDE_CAPTION_DESCRIPTORS)) {
        return new SeiReader(closedCaptionFormats);
    }
    ParsableByteArray scratchDescriptorData = new ParsableByteArray(esInfo.descriptorBytes);
    List<Format> closedCaptionFormats = this.closedCaptionFormats;
    while (scratchDescriptorData.bytesLeft() > 0) {
        int descriptorTag = scratchDescriptorData.readUnsignedByte();
        int descriptorLength = scratchDescriptorData.readUnsignedByte();
        int nextDescriptorPosition = scratchDescriptorData.getPosition() + descriptorLength;
        if (descriptorTag == DESCRIPTOR_TAG_CAPTION_SERVICE) {
            // Note: see ATSC A/65 for detailed information about the caption service descriptor.
            closedCaptionFormats = new ArrayList<>();
            int numberOfServices = scratchDescriptorData.readUnsignedByte() & 0x1F;
            for (int i = 0; i < numberOfServices; i++) {
                String language = scratchDescriptorData.readString(3);
                int captionTypeByte = scratchDescriptorData.readUnsignedByte();
                boolean isDigital = (captionTypeByte & 0x80) != 0;
                String mimeType;
                int accessibilityChannel;
                if (isDigital) {
                    mimeType = MimeTypes.APPLICATION_CEA708;
                    accessibilityChannel = captionTypeByte & 0x3F;
                } else {
                    mimeType = MimeTypes.APPLICATION_CEA608;
                    accessibilityChannel = 1;
                }
                closedCaptionFormats.add(Format.createTextSampleFormat(null, mimeType, null, Format.NO_VALUE, 0, language, accessibilityChannel, null));
                // Skip easy_reader(1), wide_aspect_ratio(1), reserved(14).
                scratchDescriptorData.skipBytes(2);
            }
        } else {
        // Unknown descriptor. Ignore.
        }
        scratchDescriptorData.setPosition(nextDescriptorPosition);
    }
    return new SeiReader(closedCaptionFormats);
}

Example 2 with Descriptor

use of com.google.android.exoplayer2.source.dash.manifest.Descriptor in project ExoPlayer by google.

the class DefaultTsPayloadReaderFactory method getClosedCaptionFormats.

/**
 * If {@link #FLAG_OVERRIDE_CAPTION_DESCRIPTORS} is set, returns a {@link List<Format>} of {@link
 * #closedCaptionFormats}. If unset, parses the PMT descriptor information and returns a {@link
 * List<Format>} for the declared formats, or {@link #closedCaptionFormats} if the descriptor is
 * not present.
 *
 * @param esInfo The {@link EsInfo} passed to {@link #createPayloadReader(int, EsInfo)}.
 * @return A {@link List<Format>} containing list of closed caption formats.
 */
private List<Format> getClosedCaptionFormats(EsInfo esInfo) {
    if (isSet(FLAG_OVERRIDE_CAPTION_DESCRIPTORS)) {
        return closedCaptionFormats;
    }
    ParsableByteArray scratchDescriptorData = new ParsableByteArray(esInfo.descriptorBytes);
    List<Format> closedCaptionFormats = this.closedCaptionFormats;
    while (scratchDescriptorData.bytesLeft() > 0) {
        int descriptorTag = scratchDescriptorData.readUnsignedByte();
        int descriptorLength = scratchDescriptorData.readUnsignedByte();
        int nextDescriptorPosition = scratchDescriptorData.getPosition() + descriptorLength;
        if (descriptorTag == DESCRIPTOR_TAG_CAPTION_SERVICE) {
            // Note: see ATSC A/65 for detailed information about the caption service descriptor.
            closedCaptionFormats = new ArrayList<>();
            int numberOfServices = scratchDescriptorData.readUnsignedByte() & 0x1F;
            for (int i = 0; i < numberOfServices; i++) {
                String language = scratchDescriptorData.readString(3);
                int captionTypeByte = scratchDescriptorData.readUnsignedByte();
                boolean isDigital = (captionTypeByte & 0x80) != 0;
                String mimeType;
                int accessibilityChannel;
                if (isDigital) {
                    mimeType = MimeTypes.APPLICATION_CEA708;
                    accessibilityChannel = captionTypeByte & 0x3F;
                } else {
                    mimeType = MimeTypes.APPLICATION_CEA608;
                    accessibilityChannel = 1;
                }
                // easy_reader(1), wide_aspect_ratio(1), reserved(6).
                byte flags = (byte) scratchDescriptorData.readUnsignedByte();
                // Skip reserved (8).
                scratchDescriptorData.skipBytes(1);
                @Nullable List<byte[]> initializationData = null;
                // The wide_aspect_ratio flag only has meaning for CEA-708.
                if (isDigital) {
                    boolean isWideAspectRatio = (flags & 0x40) != 0;
                    initializationData = CodecSpecificDataUtil.buildCea708InitializationData(isWideAspectRatio);
                }
                closedCaptionFormats.add(new Format.Builder().setSampleMimeType(mimeType).setLanguage(language).setAccessibilityChannel(accessibilityChannel).setInitializationData(initializationData).build());
            }
        } else {
        // Unknown descriptor. Ignore.
        }
        scratchDescriptorData.setPosition(nextDescriptorPosition);
    }
    return closedCaptionFormats;
}

Example 3 with Descriptor

use of com.google.android.exoplayer2.source.dash.manifest.Descriptor in project ExoPlayer by google.

the class DashMediaPeriod method getGroupedAdaptationSetIndices.

/**
 * Groups adaptation sets. Two adaptations sets belong to the same group if either:
 *
 * <ul>
 *   <li>One is a trick-play adaptation set and uses a {@code
 *       http://dashif.org/guidelines/trickmode} essential or supplemental property to indicate
 *       that the other is the main adaptation set to which it corresponds.
 *   <li>The two adaptation sets are marked as safe for switching using {@code
 *       urn:mpeg:dash:adaptation-set-switching:2016} supplemental properties.
 * </ul>
 *
 * @param adaptationSets The adaptation sets to merge.
 * @return An array of groups, where each group is an array of adaptation set indices.
 */
private static int[][] getGroupedAdaptationSetIndices(List<AdaptationSet> adaptationSets) {
    int adaptationSetCount = adaptationSets.size();
    SparseIntArray adaptationSetIdToIndex = new SparseIntArray(adaptationSetCount);
    List<List<Integer>> adaptationSetGroupedIndices = new ArrayList<>(adaptationSetCount);
    SparseArray<List<Integer>> adaptationSetIndexToGroupedIndices = new SparseArray<>(adaptationSetCount);
    // adaptationSetIdToIndex map.
    for (int i = 0; i < adaptationSetCount; i++) {
        adaptationSetIdToIndex.put(adaptationSets.get(i).id, i);
        List<Integer> initialGroup = new ArrayList<>();
        initialGroup.add(i);
        adaptationSetGroupedIndices.add(initialGroup);
        adaptationSetIndexToGroupedIndices.put(i, initialGroup);
    }
    // Merge adaptation set groups.
    for (int i = 0; i < adaptationSetCount; i++) {
        int mergedGroupIndex = i;
        AdaptationSet adaptationSet = adaptationSets.get(i);
        // Trick-play adaptation sets are merged with their corresponding main adaptation sets.
        @Nullable Descriptor trickPlayProperty = findTrickPlayProperty(adaptationSet.essentialProperties);
        if (trickPlayProperty == null) {
            // Trick-play can also be specified using a supplemental property.
            trickPlayProperty = findTrickPlayProperty(adaptationSet.supplementalProperties);
        }
        if (trickPlayProperty != null) {
            int mainAdaptationSetId = Integer.parseInt(trickPlayProperty.value);
            int mainAdaptationSetIndex = adaptationSetIdToIndex.get(mainAdaptationSetId, /* valueIfKeyNotFound= */
            -1);
            if (mainAdaptationSetIndex != -1) {
                mergedGroupIndex = mainAdaptationSetIndex;
            }
        }
        // merged group.
        if (mergedGroupIndex == i) {
            @Nullable Descriptor adaptationSetSwitchingProperty = findAdaptationSetSwitchingProperty(adaptationSet.supplementalProperties);
            if (adaptationSetSwitchingProperty != null) {
                String[] otherAdaptationSetIds = Util.split(adaptationSetSwitchingProperty.value, ",");
                for (String adaptationSetId : otherAdaptationSetIds) {
                    int otherAdaptationSetId = adaptationSetIdToIndex.get(Integer.parseInt(adaptationSetId), /* valueIfKeyNotFound= */
                    -1);
                    if (otherAdaptationSetId != -1) {
                        mergedGroupIndex = min(mergedGroupIndex, otherAdaptationSetId);
                    }
                }
            }
        }
        // Merge the groups if necessary.
        if (mergedGroupIndex != i) {
            List<Integer> thisGroup = adaptationSetIndexToGroupedIndices.get(i);
            List<Integer> mergedGroup = adaptationSetIndexToGroupedIndices.get(mergedGroupIndex);
            mergedGroup.addAll(thisGroup);
            adaptationSetIndexToGroupedIndices.put(i, mergedGroup);
            adaptationSetGroupedIndices.remove(thisGroup);
        }
    }
    int[][] groupedAdaptationSetIndices = new int[adaptationSetGroupedIndices.size()][];
    for (int i = 0; i < groupedAdaptationSetIndices.length; i++) {
        groupedAdaptationSetIndices[i] = Ints.toArray(adaptationSetGroupedIndices.get(i));
        // Restore the original adaptation set order within each group.
        Arrays.sort(groupedAdaptationSetIndices[i]);
    }
    return groupedAdaptationSetIndices;
}

Example 4 with Descriptor

use of com.google.android.exoplayer2.source.dash.manifest.Descriptor in project ExoPlayer by google.

the class DashMediaPeriod method parseClosedCaptionDescriptor.

private static Format[] parseClosedCaptionDescriptor(Descriptor descriptor, Pattern serviceDescriptorRegex, Format baseFormat) {
    @Nullable String value = descriptor.value;
    if (value == null) {
        // There are embedded closed caption tracks, but service information is not declared.
        return new Format[] { baseFormat };
    }
    String[] services = Util.split(value, ";");
    Format[] formats = new Format[services.length];
    for (int i = 0; i < services.length; i++) {
        Matcher matcher = serviceDescriptorRegex.matcher(services[i]);
        if (!matcher.matches()) {
            // If we can't parse service information for all services, assume a single track.
            return new Format[] { baseFormat };
        }
        int accessibilityChannel = Integer.parseInt(matcher.group(1));
        formats[i] = baseFormat.buildUpon().setId(baseFormat.id + ":" + accessibilityChannel).setAccessibilityChannel(accessibilityChannel).setLanguage(matcher.group(2)).build();
    }
    return formats;
}

Example 5 with Descriptor

use of com.google.android.exoplayer2.source.dash.manifest.Descriptor in project ExoPlayer by google.

the class DashManifestParser method parsePeriod.

protected Pair<Period, Long> parsePeriod(XmlPullParser xpp, List<BaseUrl> parentBaseUrls, long defaultStartMs, long baseUrlAvailabilityTimeOffsetUs, long availabilityStartTimeMs, long timeShiftBufferDepthMs, boolean dvbProfileDeclared) throws XmlPullParserException, IOException {
    @Nullable String id = xpp.getAttributeValue(null, "id");
    long startMs = parseDuration(xpp, "start", defaultStartMs);
    long periodStartUnixTimeMs = availabilityStartTimeMs != C.TIME_UNSET ? availabilityStartTimeMs + startMs : C.TIME_UNSET;
    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<>();
    ArrayList<BaseUrl> baseUrls = new ArrayList<>();
    boolean seenFirstBaseUrl = false;
    long segmentBaseAvailabilityTimeOffsetUs = C.TIME_UNSET;
    do {
        xpp.next();
        if (XmlPullParserUtil.isStartTag(xpp, "BaseURL")) {
            if (!seenFirstBaseUrl) {
                baseUrlAvailabilityTimeOffsetUs = parseAvailabilityTimeOffsetUs(xpp, baseUrlAvailabilityTimeOffsetUs);
                seenFirstBaseUrl = true;
            }
            baseUrls.addAll(parseBaseUrl(xpp, parentBaseUrls, dvbProfileDeclared));
        } else if (XmlPullParserUtil.isStartTag(xpp, "AdaptationSet")) {
            adaptationSets.add(parseAdaptationSet(xpp, !baseUrls.isEmpty() ? baseUrls : parentBaseUrls, segmentBase, durationMs, baseUrlAvailabilityTimeOffsetUs, segmentBaseAvailabilityTimeOffsetUs, periodStartUnixTimeMs, timeShiftBufferDepthMs, dvbProfileDeclared));
        } else if (XmlPullParserUtil.isStartTag(xpp, "EventStream")) {
            eventStreams.add(parseEventStream(xpp));
        } else if (XmlPullParserUtil.isStartTag(xpp, "SegmentBase")) {
            segmentBase = parseSegmentBase(xpp, /* parent= */
            null);
        } else if (XmlPullParserUtil.isStartTag(xpp, "SegmentList")) {
            segmentBaseAvailabilityTimeOffsetUs = parseAvailabilityTimeOffsetUs(xpp, /* parentAvailabilityTimeOffsetUs= */
            C.TIME_UNSET);
            segmentBase = parseSegmentList(xpp, /* parent= */
            null, periodStartUnixTimeMs, durationMs, baseUrlAvailabilityTimeOffsetUs, segmentBaseAvailabilityTimeOffsetUs, timeShiftBufferDepthMs);
        } else if (XmlPullParserUtil.isStartTag(xpp, "SegmentTemplate")) {
            segmentBaseAvailabilityTimeOffsetUs = parseAvailabilityTimeOffsetUs(xpp, /* parentAvailabilityTimeOffsetUs= */
            C.TIME_UNSET);
            segmentBase = parseSegmentTemplate(xpp, /* parent= */
            null, ImmutableList.of(), periodStartUnixTimeMs, durationMs, baseUrlAvailabilityTimeOffsetUs, segmentBaseAvailabilityTimeOffsetUs, timeShiftBufferDepthMs);
        } 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);
}