gst_internal.h

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// Copyright 2019-2021, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
 * @file
 * @brief  Semi internal structs for gstreamer code.
 * @author Jakob Bornecrantz <jakob@collabora.com>
 * @ingroup aux_util
 */
 
#pragma once
 
#include "xrt/xrt_frame.h"
 
typedef struct _GstElement GstElement;
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
/*
 *
 * Pipeline
 *
 */
 
/*!
 * A pipeline from which you can create one or more @ref gstreamer_sink from.
 *
 * @implements xrt_frame_node
 */
struct gstreamer_pipeline
{
        struct xrt_frame_node node;
 
        struct xrt_frame_context *xfctx;
 
        GstElement *pipeline;
};
 
 
/*
 *
 * Sink
 *
 */
 
/*!
 * An @ref xrt_frame_sink that uses appsrc.
 *
 * @implements xrt_frame_sink
 * @implements xrt_frame_node
 */
struct gstreamer_sink
{
        //! The base structure exposing the sink interface.
        struct xrt_frame_sink base;
 
        //! A sink can expose multie @ref xrt_frame_sink but only one node.
        struct xrt_frame_node node;
 
        //! Pipeline this sink is producing frames into.
        struct gstreamer_pipeline *gp;
 
        //! Offset applied to timestamps given to GStreamer.
        uint64_t offset_ns;
 
        //! Last sent timestamp, used to calculate duration.
        uint64_t timestamp_ns;
 
        //! Cached appsrc element.
        GstElement *appsrc;
};
 
 
#ifdef __cplusplus
}
#endif