Method Read

plugin/BiDataSource.cpp:216–256

}

int BiDataSource::Read(void *buf, size_t nbyte)
{
    if (mCurrent == nullptr)
        return -EINVAL;
    int ret = mCurrent->mDataSource->Read(buf, nbyte);
    if (ret > 0) {
        filePos += ret;
        return ret;
    }

    if (mCurrent->mDataSource->getSpeedLevel() != speedLevel_local || ret < 0) {
        return ret;
    }

    // ret == 0

    // local file
    if (fileSize == 0) {
        fileSize = getFileSize();
        if (fileSize <= 0)
            return 0;
    }

    if (filePos >= mCurrent->mRange.end) {
        // change to remote
        mCurrent = mSources[0].get() == mCurrent ? mSources[1].get() : mSources[0].get();
        if (!mCurrent->mIsOpened) {
            ret = mCurrent->mDataSource->Open(0);
            mCurrent->mIsOpened = true;
            if (ret < 0)
                return ret;
        }
        ret = static_cast<int>(mCurrent->mDataSource->Seek(filePos, SEEK_SET));
        if (ret < 0)
            return ret;
        ret = mCurrent->mDataSource->Read(buf, nbyte);
    }
    if (ret > 0)
        filePos += ret;
    return ret;
}

std::string BiDataSource::GetOption(const std::string &key)
{