encoder maxperf-enable path

[bmegli]

gst-nvvideo4linux2/gst-v4l2/gstv4l2videoenc.c

Lines 1986 to 1991 in e3ebc13

	g_object_class_install_property (gobject_class, PROP_MAX_PERF,
	g_param_spec_boolean ("maxperf-enable",
	"Enable or Disable Max Performance mode",
	"Enable or Disable Max Performance mode",
	FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS |
	GST_PARAM_MUTABLE_READY));

[bmegli]

gst-nvvideo4linux2/gst-v4l2/gstv4l2videoenc.c

Lines 283 to 285 in e3ebc13

	case PROP_MAX_PERF:
	self->maxperf_enable = g_value_get_boolean (value);
	break;

[bmegli]

gst-nvvideo4linux2/gst-v4l2/gstv4l2videoenc.c

Lines 2489 to 2495 in e3ebc13

	if (video_enc->maxperf_enable) {
	if (!set_v4l2_video_mpeg_class (video_enc->v4l2output,
	V4L2_CID_MPEG_VIDEO_MAX_PERFORMANCE, video_enc->maxperf_enable)) {
	g_print ("S_EXT_CTRLS for MAX_PERFORMANCE failed\n");
	return FALSE;
	}
	}

[bmegli]

gst-nvvideo4linux2/gst-v4l2/gstv4l2object.h

Lines 374 to 377 in e3ebc13

	#ifdef USE_V4L2_TARGET_NV
	gboolean set_v4l2_video_mpeg_class (GstV4l2Object * v4l2object, guint label,
	gint params);
	#endif

[bmegli]

gst-nvvideo4linux2/gst-v4l2/gstv4l2object.c

Lines 4954 to 4998 in e3ebc13

	#ifdef USE_V4L2_TARGET_NV
	gboolean
	set_v4l2_video_mpeg_class (GstV4l2Object * v4l2object, guint label,
	gint params)
	{
	struct v4l2_ext_control control;
	struct v4l2_ext_controls ctrls;
	gint ret;
	v4l2_enc_virtual_buffer_size buffer_size = { params };
	if (!GST_V4L2_IS_OPEN (v4l2object)) {
	g_print ("V4L2 device is not open\n");
	return FALSE;
	}
	memset (&control, 0, sizeof (control));
	memset (&ctrls, 0, sizeof (ctrls));
	ctrls.count = 1;
	ctrls.controls = &control;
	ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
	control.id = label;
	if (control.id == V4L2_CID_MPEG_VIDEOENC_VIRTUALBUFFER_SIZE) {
	control.string = (gchar *) &buffer_size;
	} else if ((control.id == V4L2_CID_MPEG_VIDEOENC_SLICE_INTRAREFRESH_PARAM) ||
	(control.id == V4L2_CID_MPEG_VIDEOENC_NUM_REFERENCE_FRAMES)) {
	control.string = (gchar *) &params;
	} else {
	control.value = params;
	}
	ret = v4l2object->ioctl (v4l2object->video_fd, VIDIOC_S_EXT_CTRLS, &ctrls);
	if (ret < 0) {
	g_print ("Error while setting IOCTL\n");
	if (errno == EINVAL)
	g_print ("Invalid control\n");
	return FALSE;
	}
	return TRUE;
	}
	#endif

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gst-nvvideo4linux2/v4l2_nv_extensions.h

Lines 1153 to 1161 in e3ebc13

	/**
	* Control ID to enable maximum Performance.
	*
	* An integer value must be supplied with this control.
	*
	* @attention This control should be set after setting formats on both the planes
	* and before requesting buffers on either plane.
	*/
	#define V4L2_CID_MPEG_VIDEO_MAX_PERFORMANCE (V4L2_CID_MPEG_BASE+554)

[bmegli]

https://docs.nvidia.com/jetson/l4t-multimedia/classNvVideoDecoder.html#a3334a8ebb14385f42dabc62a7dbdadb2

[bmegli]

Conclusion

GStreamer maxperf-enable equivalent in Jetson Linux Multimedia API is encoder's:

• setMaxPerfMode

Decoder's equivalent:

• setMaxPerfMode

Some care has to be taken when it is called (see above docs)