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va: h264enc: Set preferred_output_delay value to increase performance

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Also calculate the correct latency.
In live mode, preferred_output_delay is disabled.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4359>
This commit is contained in:
He Junyan 2024-04-04 22:22:04 +08:00 committed by Víctor Manuel Jáquez Leal
parent a73474827b
commit fe25ed22e1
1 changed files with 24 additions and 1 deletions
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25
subprojects/gst-plugins-bad/sys/va/gstvah264enc.c
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@ -1553,13 +1553,16 @@ gst_va_h264_enc_reconfig (GstVaBaseEnc * base)
GstVideoFormat format, reconf_format = GST_VIDEO_FORMAT_UNKNOWN;
VAProfile profile = VAProfileNone;
gboolean do_renegotiation = TRUE, do_reopen, need_negotiation;
guint max_ref_frames, max_surfaces = 0, rt_format = 0, codedbuf_size;
guint max_ref_frames, max_surfaces = 0, rt_format = 0,
codedbuf_size, latency_num;
gint width, height;
GstClockTime latency;
width = GST_VIDEO_INFO_WIDTH (&base->in_info);
height = GST_VIDEO_INFO_HEIGHT (&base->in_info);
format = GST_VIDEO_INFO_FORMAT (&base->in_info);
codedbuf_size = base->codedbuf_size;
latency_num = base->preferred_output_delay + self->gop.ip_period - 1;
need_negotiation =
!gst_va_encoder_get_reconstruct_pool_config (base->encoder, &reconf_caps,
@ -1584,6 +1587,13 @@ gst_va_h264_enc_reconfig (GstVaBaseEnc * base)
gst_va_base_enc_reset_state (base);
if (base->is_live) {
base->preferred_output_delay = 0;
} else {
/* FIXME: An experience value for most of the platforms. */
base->preferred_output_delay = 4;
}
base->profile = profile;
base->rt_format = rt_format;
base->width = width;
@ -1636,7 +1646,20 @@ gst_va_h264_enc_reconfig (GstVaBaseEnc * base)
self->cc = self->cc && self->packed_headers & VA_ENC_PACKED_HEADER_RAW_DATA;
update_property_bool (base, &self->prop.cc, self->cc, PROP_CC);
/* Let the downstream know the new latency. */
if (latency_num != base->preferred_output_delay + self->gop.ip_period - 1) {
need_negotiation = TRUE;
latency_num = base->preferred_output_delay + self->gop.ip_period - 1;
}
/* Set the latency */
latency = gst_util_uint64_scale (latency_num,
GST_VIDEO_INFO_FPS_D (&base->input_state->info) * GST_SECOND,
GST_VIDEO_INFO_FPS_N (&base->input_state->info));
gst_video_encoder_set_latency (venc, latency, latency);
max_ref_frames = self->gop.num_ref_frames + 3 /* scratch frames */ ;
max_ref_frames += base->preferred_output_delay;
/* second check after calculations */
do_reopen |=