class dlstreamer::GSTContext#

Overview#

#include <context.h>

class GSTContext: public dlstreamer::BaseContext {
public:
    // construction

    GSTContext(GstElement* element);

    // methods

    virtual ContextPtr derive_context(MemoryType memory_type);

    virtual MemoryMapperPtr get_mapper(
        const ContextPtr& input_context,
        const ContextPtr& output_context
    );
};

Inherited Members#

public:
    // typedefs

    typedef void* handle_t;

    // structs

    struct key;

    // methods

    virtual MemoryType memory_type() const = 0;
    virtual handle_t handle(std::string_view key = {}) const = 0;

    virtual MemoryMapperPtr get_mapper(
        const ContextPtr& input_context,
        const ContextPtr& output_context
    ) = 0;

    virtual ContextPtr derive_context(MemoryType memory_type) = 0;
    virtual ContextPtr parent() = 0;
    virtual MemoryType memory_type() const;
    virtual handle_t handle(std::string_view key) const;
    virtual std::vector<std::string> keys() const;

    virtual MemoryMapperPtr get_mapper(
        const ContextPtr& input_context,
        const ContextPtr& output_context
    );

    virtual ContextPtr derive_context(MemoryType memory_type);
    virtual ContextPtr parent();
    void set_parent(ContextPtr parent);
    void set_memory_type(MemoryType memory_type);
    void attach_mapper(MemoryMapperPtr mapper);
    void remove_mapper(MemoryMapperPtr mapper);

Detailed Documentation#

Methods#

virtual ContextPtr derive_context(MemoryType memory_type)

Create another context of specified memory type. New context belongs to same device (if multiple GPUs) as original context, and parent() returns reference to original context. If creating new context failed, function returns nullptr.

Parameters:

memory_type

Memory type of new context

virtual MemoryMapperPtr get_mapper(
    const ContextPtr& input_context,
    const ContextPtr& output_context
)

Returns an object for memory mapping between two contexts. Function typically expects one of contexts to be this context. If one of contexts has memory type CPU or context reference is nullptr, function returns object for mapping to or from system memory. If creating memory mapping object failed, exception is thrown.