All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.coremedia.iso.boxes.sampleentry.VisualSampleEntry Maven / Gradle / Ivy

Go to download

A generic parser and writer for all ISO 14496 based files (MP4, Quicktime, DCF, PDCF, ...)

There is a newer version: 1.1.22
Show newest version
/*  
 * Copyright 2008 CoreMedia AG, Hamburg
 *
 * 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.coremedia.iso.boxes.sampleentry;

import com.coremedia.iso.BoxParser;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.coremedia.iso.Utf8;
import com.coremedia.iso.boxes.Container;
import com.googlecode.mp4parser.DataSource;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;

import static com.googlecode.mp4parser.util.CastUtils.l2i;

/**
 * 

4cc = "{@value #TYPE1}" || "{@value #TYPE2}" || "{@value #TYPE3}" || "{@value #TYPE4}" || "{@value #TYPE5}"

* Contains information common to all visual tracks. *
 * class VisualSampleEntry(codingname) extends AbstractSampleEntry (codingname){
 *  unsigned int(16) pre_defined = 0;
 *  const unsigned int(16) reserved = 0;
 *  unsigned int(32)[3] pre_defined = 0;
 *  unsigned int(16) width;
 *  unsigned int(16) height;
 *  template unsigned int(32) horizresolution = 0x00480000; // 72 dpi
 *  template unsigned int(32) vertresolution = 0x00480000; // 72 dpi
 *  const unsigned int(32) reserved = 0;
 *  template unsigned int(16) frame_count = 1;
 *  string[32] compressorname;
 *  template unsigned int(16) depth = 0x0018;
 *  int(16) pre_defined = -1;
 * }
 * 
* * Format-specific information is appened as boxes after the data described in ISO/IEC 14496-12 chapter 8.16.2. */ public final class VisualSampleEntry extends AbstractSampleEntry implements Container { public static final String TYPE1 = "mp4v"; public static final String TYPE2 = "s263"; public static final String TYPE3 = "avc1"; public static final String TYPE4 = "avc3"; public static final String TYPE5 = "drmi"; public static final String TYPE6 = "hvc1"; public static final String TYPE7 = "hev1"; /** * Identifier for an encrypted video track. * * @see com.coremedia.iso.boxes.ProtectionSchemeInformationBox */ public static final String TYPE_ENCRYPTED = "encv"; private int width; private int height; private double horizresolution = 72; private double vertresolution = 72; private int frameCount = 1; private String compressorname = ""; private int depth = 24; private long[] predefined = new long[3]; public VisualSampleEntry() { super(TYPE3); } public VisualSampleEntry(String type) { super(type); } public void setType(String type) { this.type = type; } public int getWidth() { return width; } public void setWidth(int width) { this.width = width; } public int getHeight() { return height; } public void setHeight(int height) { this.height = height; } public double getHorizresolution() { return horizresolution; } public void setHorizresolution(double horizresolution) { this.horizresolution = horizresolution; } public double getVertresolution() { return vertresolution; } public void setVertresolution(double vertresolution) { this.vertresolution = vertresolution; } public int getFrameCount() { return frameCount; } public void setFrameCount(int frameCount) { this.frameCount = frameCount; } public String getCompressorname() { return compressorname; } public void setCompressorname(String compressorname) { this.compressorname = compressorname; } public int getDepth() { return depth; } public void setDepth(int depth) { this.depth = depth; } @Override public void parse(final DataSource dataSource, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException { final long endPosition = dataSource.position() + contentSize; ByteBuffer content = ByteBuffer.allocate(78); dataSource.read(content); content.position(6); dataReferenceIndex = IsoTypeReader.readUInt16(content); long tmp = IsoTypeReader.readUInt16(content); assert 0 == tmp : "reserved byte not 0"; tmp = IsoTypeReader.readUInt16(content); assert 0 == tmp : "reserved byte not 0"; predefined[0] = IsoTypeReader.readUInt32(content); // should be zero predefined[1] = IsoTypeReader.readUInt32(content); // should be zero predefined[2] = IsoTypeReader.readUInt32(content); // should be zero width = IsoTypeReader.readUInt16(content); height = IsoTypeReader.readUInt16(content); horizresolution = IsoTypeReader.readFixedPoint1616(content); vertresolution = IsoTypeReader.readFixedPoint1616(content); tmp = IsoTypeReader.readUInt32(content); assert 0 == tmp : "reserved byte not 0"; frameCount = IsoTypeReader.readUInt16(content); int compressornameDisplayAbleData = IsoTypeReader.readUInt8(content); if (compressornameDisplayAbleData > 31) { //System.out.println("invalid compressor name displayable data: " + compressornameDisplayAbleData); compressornameDisplayAbleData = 31; } byte[] bytes = new byte[compressornameDisplayAbleData]; content.get(bytes); compressorname = Utf8.convert(bytes); if (compressornameDisplayAbleData < 31) { byte[] zeros = new byte[31 - compressornameDisplayAbleData]; content.get(zeros); //assert Mp4Arrays.equals(zeros, new byte[zeros.length]) : "The compressor name length was not filled up with zeros"; } depth = IsoTypeReader.readUInt16(content); tmp = IsoTypeReader.readUInt16(content); assert 0xFFFF == tmp; final DataSource dsLimited = new DataSource() { public int read(ByteBuffer byteBuffer) throws IOException { if (endPosition == dataSource.position()) { return -1; } else if (byteBuffer.remaining() > endPosition - dataSource.position()) { ByteBuffer bb = ByteBuffer.allocate(l2i(endPosition - dataSource.position())); dataSource.read(bb); byteBuffer.put((ByteBuffer) bb.rewind()); return bb.capacity(); } else { return dataSource.read(byteBuffer); } } public long size() throws IOException { return endPosition; } public long position() throws IOException { return dataSource.position(); } public void position(long nuPos) throws IOException { dataSource.position(nuPos); } public long transferTo(long position, long count, WritableByteChannel target) throws IOException { return dataSource.transferTo(position, count, target); } public ByteBuffer map(long startPosition, long size) throws IOException { return dataSource.map(startPosition, size); } public void close() throws IOException { dataSource.close(); } }; initContainer(dsLimited, contentSize - 78, boxParser); } @Override public void getBox(WritableByteChannel writableByteChannel) throws IOException { writableByteChannel.write(getHeader()); ByteBuffer byteBuffer = ByteBuffer.allocate(78); byteBuffer.position(6); IsoTypeWriter.writeUInt16(byteBuffer, dataReferenceIndex); IsoTypeWriter.writeUInt16(byteBuffer, 0); IsoTypeWriter.writeUInt16(byteBuffer, 0); IsoTypeWriter.writeUInt32(byteBuffer, predefined[0]); IsoTypeWriter.writeUInt32(byteBuffer, predefined[1]); IsoTypeWriter.writeUInt32(byteBuffer, predefined[2]); IsoTypeWriter.writeUInt16(byteBuffer, getWidth()); IsoTypeWriter.writeUInt16(byteBuffer, getHeight()); IsoTypeWriter.writeFixedPoint1616(byteBuffer, getHorizresolution()); IsoTypeWriter.writeFixedPoint1616(byteBuffer, getVertresolution()); IsoTypeWriter.writeUInt32(byteBuffer, 0); IsoTypeWriter.writeUInt16(byteBuffer, getFrameCount()); IsoTypeWriter.writeUInt8(byteBuffer, Utf8.utf8StringLengthInBytes(getCompressorname())); byteBuffer.put(Utf8.convert(getCompressorname())); int a = Utf8.utf8StringLengthInBytes(getCompressorname()); while (a < 31) { a++; byteBuffer.put((byte) 0); } IsoTypeWriter.writeUInt16(byteBuffer, getDepth()); IsoTypeWriter.writeUInt16(byteBuffer, 0xFFFF); writableByteChannel.write((ByteBuffer) byteBuffer.rewind()); writeContainer(writableByteChannel); } @Override public long getSize() { long s = getContainerSize(); long t = 78; return s + t + ((largeBox || (s + t + 8) >= (1L << 32)) ? 16 : 8); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy