Exemplos de parseDecoderConfigDescriptor em C++ (Cpp)

Exemplo n.º 1

Arquivo: ESDS.cpp Projeto: RealVNC/AndroidFrameworksBase

status_t ESDS::parseESDescriptor(size_t offset, size_t size) {
    if (size < 3) {
        return ERROR_MALFORMED;
    }

    offset += 2;  // skip ES_ID
    size -= 2;

    unsigned streamDependenceFlag = mData[offset] & 0x80;
    unsigned URL_Flag = mData[offset] & 0x40;
    unsigned OCRstreamFlag = mData[offset] & 0x20;

    ++offset;
    --size;

    if (streamDependenceFlag) {
        offset += 2;
        size -= 2;
    }

    if (URL_Flag) {
        if (offset >= size) {
            return ERROR_MALFORMED;
        }
        unsigned URLlength = mData[offset];
        offset += URLlength + 1;
        size -= URLlength + 1;
    }

    if (OCRstreamFlag) {
        offset += 2;
        size -= 2;
    }
    
    if (offset >= size) {
        return ERROR_MALFORMED;
    }

    uint8_t tag;
    size_t sub_offset, sub_size;
    status_t err = skipDescriptorHeader(
            offset, size, &tag, &sub_offset, &sub_size);

    if (err != OK) {
        return err;
    }

    if (tag != kTag_DecoderConfigDescriptor) {
        return ERROR_MALFORMED;
    }

    err = parseDecoderConfigDescriptor(sub_offset, sub_size);

    return err;
}

Exemplo n.º 2

Arquivo: ESDS.cpp Projeto: EricCheung3/Android-HLS-lib

status_t ESDS::parseESDescriptor(size_t offset, size_t size) {
    if (size < 3) {
        return ERROR_MALFORMED;
    }
    offset += 2;  // skip ES_ID
    size -= 2;
    unsigned streamDependenceFlag = mData[offset] & 0x80;
    unsigned URL_Flag = mData[offset] & 0x40;
    unsigned OCRstreamFlag = mData[offset] & 0x20;
    ++offset;
    --size;
    if (streamDependenceFlag) {
        offset += 2;
        size -= 2;
    }
    if (URL_Flag) {
        if (offset >= size) {
            return ERROR_MALFORMED;
        }
        unsigned URLlength = mData[offset];
        offset += URLlength + 1;
        size -= URLlength + 1;
    }
    if (OCRstreamFlag) {
        offset += 2;
        size -= 2;
        if ((offset >= size || mData[offset] != kTag_DecoderConfigDescriptor)
                && offset - 2 < size
                && mData[offset - 2] == kTag_DecoderConfigDescriptor) {
            // Content found "in the wild" had OCRstreamFlag set but was
            // missing OCR_ES_Id, the decoder config descriptor immediately
            // followed instead.
            offset -= 2;
            size += 2;
            LOGW("Found malformed 'esds' atom, ignoring missing OCR_ES_Id.");
        }
    }
    if (offset >= size) {
        return ERROR_MALFORMED;
    }
    uint8_t tag;
    size_t sub_offset, sub_size;
    status_t err = skipDescriptorHeader(
            offset, size, &tag, &sub_offset, &sub_size);
    if (err != OK) {
        return err;
    }
    if (tag != kTag_DecoderConfigDescriptor) {
        return ERROR_MALFORMED;
    }
    err = parseDecoderConfigDescriptor(sub_offset, sub_size);
    return err;
}