mirror of
https://gitlab.freedesktop.org/monado/monado.git
synced 2025-01-23 23:21:46 +00:00
153 lines
4 KiB
C
153 lines
4 KiB
C
// Copyright 2019-2021, Collabora, Ltd.
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
/*!
|
|
* @file
|
|
* @brief An @ref xrt_frame_sink that does gst things.
|
|
* @author Jakob Bornecrantz <jakob@collabora.com>
|
|
* @author Aaron Boxer <aaron.boxer@collabora.com>
|
|
* @ingroup aux_util
|
|
*/
|
|
|
|
#include "util/u_misc.h"
|
|
#include "util/u_debug.h"
|
|
|
|
#include "gstreamer/gst_internal.h"
|
|
#include "gstreamer/gst_pipeline.h"
|
|
|
|
|
|
/*
|
|
*
|
|
* Internal pipeline functions.
|
|
*
|
|
*/
|
|
|
|
static void
|
|
break_apart(struct xrt_frame_node *node)
|
|
{
|
|
struct gstreamer_pipeline *gp = container_of(node, struct gstreamer_pipeline, node);
|
|
|
|
/*
|
|
* This function is called when we are shutting down, after returning
|
|
* from this function you are not allowed to call any other nodes in the
|
|
* graph. But it must be safe for other nodes to call any normal
|
|
* functions on us. Once the context is done calling break_aprt on all
|
|
* objects it will call destroy on them.
|
|
*/
|
|
|
|
(void)gp;
|
|
}
|
|
|
|
static void
|
|
destroy(struct xrt_frame_node *node)
|
|
{
|
|
struct gstreamer_pipeline *gp = container_of(node, struct gstreamer_pipeline, node);
|
|
|
|
/*
|
|
* All of the nodes has been broken apart and none of our functions will
|
|
* be called, it's now safe to destroy and free ourselves.
|
|
*/
|
|
|
|
free(gp);
|
|
}
|
|
|
|
|
|
/*
|
|
*
|
|
* Exported functions.
|
|
*
|
|
*/
|
|
|
|
void
|
|
gstreamer_pipeline_play(struct gstreamer_pipeline *gp)
|
|
{
|
|
U_LOG_D("Starting pipeline");
|
|
|
|
gst_element_set_state(gp->pipeline, GST_STATE_PLAYING);
|
|
}
|
|
|
|
void
|
|
gstreamer_pipeline_stop(struct gstreamer_pipeline *gp)
|
|
{
|
|
U_LOG_D("Stopping pipeline");
|
|
|
|
// Settle the pipeline.
|
|
U_LOG_T("Sending EOS");
|
|
gst_element_send_event(gp->pipeline, gst_event_new_eos());
|
|
|
|
// Wait for EOS message on the pipeline bus.
|
|
U_LOG_T("Waiting for EOS");
|
|
GstMessage *msg = NULL;
|
|
msg = gst_bus_timed_pop_filtered(GST_ELEMENT_BUS(gp->pipeline), GST_CLOCK_TIME_NONE,
|
|
GST_MESSAGE_EOS | GST_MESSAGE_ERROR);
|
|
//! @todo Should check if we got an error message here or an eos.
|
|
(void)msg;
|
|
|
|
// Completely stop the pipeline.
|
|
U_LOG_T("Setting to NULL");
|
|
gst_element_set_state(gp->pipeline, GST_STATE_NULL);
|
|
}
|
|
|
|
void
|
|
gstreamer_pipeline_create_from_string(struct xrt_frame_context *xfctx,
|
|
const char *pipeline_string,
|
|
struct gstreamer_pipeline **out_gp)
|
|
{
|
|
gst_init(NULL, NULL);
|
|
|
|
struct gstreamer_pipeline *gp = U_TYPED_CALLOC(struct gstreamer_pipeline);
|
|
gp->node.break_apart = break_apart;
|
|
gp->node.destroy = destroy;
|
|
gp->xfctx = xfctx;
|
|
|
|
// Setup pipeline.
|
|
gp->pipeline = gst_parse_launch(pipeline_string, NULL);
|
|
|
|
/*
|
|
* Add ourselves to the context so we are destroyed.
|
|
* This is done once we know everything is completed.
|
|
*/
|
|
xrt_frame_context_add(xfctx, &gp->node);
|
|
|
|
*out_gp = gp;
|
|
}
|
|
|
|
void
|
|
gstreamer_pipeline_create_autovideo_sink(struct xrt_frame_context *xfctx,
|
|
const char *appsrc_name,
|
|
struct gstreamer_pipeline **out_gp)
|
|
{
|
|
gst_init(NULL, NULL);
|
|
|
|
struct gstreamer_pipeline *gp = U_TYPED_CALLOC(struct gstreamer_pipeline);
|
|
gp->node.break_apart = break_apart;
|
|
gp->node.destroy = destroy;
|
|
gp->xfctx = xfctx;
|
|
|
|
// Setup pipeline.
|
|
gp->pipeline = gst_pipeline_new("pipeline");
|
|
GstElement *appsrc = gst_element_factory_make("appsrc", appsrc_name);
|
|
GstElement *conv = gst_element_factory_make("videoconvert", "conv");
|
|
GstElement *scale = gst_element_factory_make("videoscale", "scale");
|
|
GstElement *videosink = gst_element_factory_make("autovideosink", "videosink");
|
|
|
|
gst_bin_add_many(GST_BIN(gp->pipeline), //
|
|
appsrc, //
|
|
conv, //
|
|
scale, //
|
|
videosink, //
|
|
NULL);
|
|
gst_element_link_many(appsrc, //
|
|
conv, //
|
|
scale, //
|
|
videosink, //
|
|
NULL);
|
|
|
|
/*
|
|
* Add ourselves to the context so we are destroyed.
|
|
* This is done once we know everything is completed.
|
|
*/
|
|
xrt_frame_context_add(xfctx, &gp->node);
|
|
|
|
*out_gp = gp;
|
|
}
|