class dlstreamer::GSTContextQuery

Overview

#include <context.h>

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

    GSTContextQuery(
        GstPad* pad,
        MemoryType memory_type,
        const char* context_name = nullptr
    );

    GSTContextQuery(
        GstElement* element,
        MemoryType memory_type,
        const char* context_name = nullptr
    );

    GSTContextQuery(
        GstBaseTransform* element,
        MemoryType memory_type,
        const char* context_name = nullptr
    );

    // methods

    virtual handle_t handle(std::string_view key) const;
};

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 handle_t handle(std::string_view key) const

Returns a handle by key. If empty key, returns default handle. If no handle with the specified key, returns 0.

Parameters:

key	the key of the handle to find