diff options
Diffstat (limited to 'mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java')
-rw-r--r-- | mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java new file mode 100644 index 0000000000..844712146a --- /dev/null +++ b/mobile/android/exoplayer2/src/main/java/org/mozilla/thirdparty/com/google/android/exoplayer2/video/HevcConfig.java @@ -0,0 +1,91 @@ +/* + * 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 org.mozilla.thirdparty.com.google.android.exoplayer2.video; + +import androidx.annotation.Nullable; +import org.mozilla.thirdparty.com.google.android.exoplayer2.ParserException; +import org.mozilla.thirdparty.com.google.android.exoplayer2.util.NalUnitUtil; +import org.mozilla.thirdparty.com.google.android.exoplayer2.util.ParsableByteArray; +import java.util.Collections; +import java.util.List; + +/** + * HEVC configuration data. + */ +public final class HevcConfig { + + @Nullable public final List<byte[]> initializationData; + public final int nalUnitLengthFieldLength; + + /** + * Parses HEVC configuration data. + * + * @param data A {@link ParsableByteArray}, whose position is set to the start of the HEVC + * configuration data to parse. + * @return A parsed representation of the HEVC configuration data. + * @throws ParserException If an error occurred parsing the data. + */ + public static HevcConfig parse(ParsableByteArray data) throws ParserException { + try { + data.skipBytes(21); // Skip to the NAL unit length size field. + int lengthSizeMinusOne = data.readUnsignedByte() & 0x03; + + // Calculate the combined size of all VPS/SPS/PPS bitstreams. + int numberOfArrays = data.readUnsignedByte(); + int csdLength = 0; + int csdStartPosition = data.getPosition(); + for (int i = 0; i < numberOfArrays; i++) { + data.skipBytes(1); // completeness (1), nal_unit_type (7) + int numberOfNalUnits = data.readUnsignedShort(); + for (int j = 0; j < numberOfNalUnits; j++) { + int nalUnitLength = data.readUnsignedShort(); + csdLength += 4 + nalUnitLength; // Start code and NAL unit. + data.skipBytes(nalUnitLength); + } + } + + // Concatenate the codec-specific data into a single buffer. + data.setPosition(csdStartPosition); + byte[] buffer = new byte[csdLength]; + int bufferPosition = 0; + for (int i = 0; i < numberOfArrays; i++) { + data.skipBytes(1); // completeness (1), nal_unit_type (7) + int numberOfNalUnits = data.readUnsignedShort(); + for (int j = 0; j < numberOfNalUnits; j++) { + int nalUnitLength = data.readUnsignedShort(); + System.arraycopy(NalUnitUtil.NAL_START_CODE, 0, buffer, bufferPosition, + NalUnitUtil.NAL_START_CODE.length); + bufferPosition += NalUnitUtil.NAL_START_CODE.length; + System + .arraycopy(data.data, data.getPosition(), buffer, bufferPosition, nalUnitLength); + bufferPosition += nalUnitLength; + data.skipBytes(nalUnitLength); + } + } + + List<byte[]> initializationData = csdLength == 0 ? null : Collections.singletonList(buffer); + return new HevcConfig(initializationData, lengthSizeMinusOne + 1); + } catch (ArrayIndexOutOfBoundsException e) { + throw new ParserException("Error parsing HEVC config", e); + } + } + + private HevcConfig(@Nullable List<byte[]> initializationData, int nalUnitLengthFieldLength) { + this.initializationData = initializationData; + this.nalUnitLengthFieldLength = nalUnitLengthFieldLength; + } + +} |