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C++ BitStream::readStringWithLen方法代码示例

本文整理汇总了C++中BitStream::readStringWithLen方法的典型用法代码示例。如果您正苦于以下问题:C++ BitStream::readStringWithLen方法的具体用法?C++ BitStream::readStringWithLen怎么用?C++ BitStream::readStringWithLen使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在BitStream的用法示例。


在下文中一共展示了BitStream::readStringWithLen方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: parseBox

void ElementaryStreamDescriptorBox::parseBox(BitStream& bitstr)
{
    parseFullBoxHeader(bitstr);

    //////////////////////////////////////////////
    //      Fill in struct ES_Descriptor        //
    //////////////////////////////////////////////
    mES_Descriptor.ES_DescrTag = bitstr.read8Bits();
    if (mES_Descriptor.ES_DescrTag != 3)  // ES_DescrTag
    {
        throw RuntimeError("ElementaryStreamDescritorBox ES_Descriptor.ES_DescrTag not valid");
    }
    /* Expandable class... need to find out size based on (from ISO/IEC 14496-1)
     * int sizeOfInstance = 0;
     * bit(1) nextByte;
     * bit(7) sizeOfInstance;
     * while(nextByte) {
     *      bit(1) nextByte;
     *      bit(7) sizeByte;
     *      sizeOfInstance = sizeOfInstance<<7 | sizeByte; }
     */
    std::uint8_t readByte = 0;
    std::uint32_t size    = 0;
    do
    {
        readByte              = bitstr.read8Bits();
        std::uint8_t sizeByte = (readByte & 0x7F);
        size                  = (size << 7) | sizeByte;
    } while (readByte & 0x80);

    mES_Descriptor.size  = size;
    mES_Descriptor.ES_ID = bitstr.read16Bits();
    mES_Descriptor.flags = bitstr.read8Bits();

    if (mES_Descriptor.flags & 0x80)  // streamDependenceFlag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
    {
        mES_Descriptor.dependsOn_ES_ID = bitstr.read16Bits();
    }

    if (mES_Descriptor.flags & 0x40)  // URL_Flag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
    {
        mES_Descriptor.URLlength = bitstr.read8Bits();
        if (mES_Descriptor.URLlength)
        {
            bitstr.readStringWithLen(mES_Descriptor.URLstring, mES_Descriptor.URLlength);
        }
    }

    if (mES_Descriptor.flags & 0x20)  // OCRstreamFlag as defined in 7.2.6.5.1 of ISO/IEC 14486-1:2010(E)
    {
        mES_Descriptor.OCR_ES_Id = bitstr.read16Bits();
    }

    //////////////////////////////////////////////////////////////////
    //      Fill in struct ES_Descriptor.DecoderConfigDescriptor    //
    //////////////////////////////////////////////////////////////////
    mES_Descriptor.decConfigDescr.DecoderConfigDescrTag = bitstr.read8Bits();
    if (mES_Descriptor.decConfigDescr.DecoderConfigDescrTag != 4)  // DecoderConfigDescrTag
    {
        throw RuntimeError("ElementaryStreamDescritorBox DecoderConfigDescriptor.DecoderConfigDescrTag not valid");
    }

    readByte = 0;
    size     = 0;
    do
    {
        readByte              = bitstr.read8Bits();
        std::uint8_t sizeByte = (readByte & 0x7f);
        size                  = (size << 7) | sizeByte;
    } while (readByte & 0x80);

    mES_Descriptor.decConfigDescr.size                 = size;
    mES_Descriptor.decConfigDescr.objectTypeIndication = bitstr.read8Bits();
    mES_Descriptor.decConfigDescr.streamType           = (bitstr.read8Bits() >> 2);
    mES_Descriptor.decConfigDescr.bufferSizeDB         = bitstr.read24Bits();
    mES_Descriptor.decConfigDescr.maxBitrate           = bitstr.read32Bits();
    mES_Descriptor.decConfigDescr.avgBitrate           = bitstr.read32Bits();

    /////////////////////////////////////////////////////////////////////////////////////
    //      Fill in struct ES_Descriptor.DecoderConfigDescriptor.DecoderSpecificInfo   //
    /////////////////////////////////////////////////////////////////////////////////////
    while (bitstr.numBytesLeft())  // DecoderSpecificInfo is optional.
    {
        std::uint8_t tag = bitstr.read8Bits();

        readByte = 0;
        size     = 0;
        do
        {
            readByte              = bitstr.read8Bits();
            std::uint8_t sizeByte = (readByte & 0x7f);
            size                  = (size << 7) | sizeByte;
        } while (readByte & 0x80);

        DecoderSpecificInfo decSpecificInfo;

        decSpecificInfo.DecSpecificInfoTag = tag;
        decSpecificInfo.size               = size;
        bitstr.read8BitsArray(decSpecificInfo.DecSpecificInfo, decSpecificInfo.size);

//.........这里部分代码省略.........
开发者ID:jfiguinha,项目名称:Regards,代码行数:101,代码来源:elementarystreamdescriptorbox.cpp


注:本文中的BitStream::readStringWithLen方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。