Merge "codec2: fix C2Buffer" into pi-dev

    std::shared_ptr<_C2BlockPoolData> mPoolData;

};

class C2_HIDE _C2MappingBlock2DImpl : public _C2Block2DImpl {

class C2_HIDE _C2MappingBlock2DImpl

    : public _C2Block2DImpl, public std::enable_shared_from_this<_C2MappingBlock2DImpl> {

public:

    using _C2Block2DImpl::_C2Block2DImpl;

    private:

        friend class _C2MappingBlock2DImpl;

        Mapped(const _C2Block2DImpl *impl, bool writable, C2Fence *fence __unused)

        Mapped(const std::shared_ptr<_C2Block2DImpl> &impl, bool writable, C2Fence *fence __unused)

            : mImpl(impl), mWritable(writable) {

            memset(mData, 0, sizeof(mData));

            const C2Rect crop = mImpl->crop();

        bool writable() const { return mWritable; }

    private:

        const _C2Block2DImpl *mImpl;

        const std::shared_ptr<_C2Block2DImpl> mImpl;

        bool mWritable;

        c2_status_t mError;

        uint8_t *mData[C2PlanarLayout::MAX_NUM_PLANES];

        std::lock_guard<std::mutex> lock(mMappedLock);

        std::shared_ptr<Mapped> existing = mMapped.lock();

        if (!existing) {

            existing = std::shared_ptr<Mapped>(new Mapped(this, writable, fence));

            existing = std::shared_ptr<Mapped>(new Mapped(shared_from_this(), writable, fence));

            mMapped = existing;

        } else {

            // if we mapped the region read-only, we cannot remap it read-write