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h264decoder: Fix for latency report

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The minimum latency answered by an element should be the maximum
latency from the element's perspective. Also consider max_reorder_frames
update as a sequence change

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4357>
This commit is contained in:
Seungha Yang 2023-04-06 20:48:17 +09:00 committed by GStreamer Marge Bot
parent e0c2578f73
commit 73daa0e0ad
3 changed files with 48 additions and 30 deletions
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59
subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264decoder.c
View file

@ -2291,7 +2291,7 @@ gst_h264_decoder_set_latency (GstH264Decoder * self, const GstH264SPS * sps,
GstStructure *structure;
gint fps_d = 1, fps_n = 0;
GstH264DpbBumpMode bump_level;
guint32 frames_delay;
guint32 frames_delay, max_frames_delay;
caps = gst_pad_get_current_caps (GST_VIDEO_DECODER_SRC_PAD (self));
if (!caps && self->input_state)
@ -2314,35 +2314,27 @@ gst_h264_decoder_set_latency (GstH264Decoder * self, const GstH264SPS * sps,
fps_d = 1;
}
frames_delay = max_dpb_size;
bump_level = get_bump_level (self);
frames_delay = 0;
switch (bump_level) {
case GST_H264_DPB_BUMP_NORMAL_LATENCY:
/* We always wait the DPB full before bumping. */
frames_delay = max_dpb_size;
break;
case GST_H264_DPB_BUMP_LOW_LATENCY:
/* We bump the IDR if the second frame is not a minus POC. */
frames_delay = 1;
break;
case GST_H264_DPB_BUMP_VERY_LOW_LATENCY:
/* We bump the IDR immediately. */
frames_delay = 0;
break;
default:
g_assert_not_reached ();
break;
if (bump_level != GST_H264_DPB_BUMP_NORMAL_LATENCY) {
guint32 max_reorder_frames =
gst_h264_dpb_get_max_num_reorder_frames (priv->dpb);
frames_delay = MIN (max_dpb_size, max_reorder_frames);
}
/* Consider output delay wanted by subclass */
frames_delay += priv->preferred_output_delay;
min = gst_util_uint64_scale_int (frames_delay * GST_SECOND, fps_d, fps_n);
max = gst_util_uint64_scale_int ((max_dpb_size + priv->preferred_output_delay)
* GST_SECOND, fps_d, fps_n);
max_frames_delay = max_dpb_size + priv->preferred_output_delay;
GST_LOG_OBJECT (self,
"latency min %" G_GUINT64_FORMAT " max %" G_GUINT64_FORMAT, min, max);
min = gst_util_uint64_scale_int (frames_delay * GST_SECOND, fps_d, fps_n);
max = gst_util_uint64_scale_int (max_frames_delay * GST_SECOND, fps_d, fps_n);
GST_DEBUG_OBJECT (self,
"latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT
", frames-delay %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max),
frames_delay);
gst_video_decoder_set_latency (GST_VIDEO_DECODER (self), min, max);
}
@ -2358,6 +2350,8 @@ gst_h264_decoder_process_sps (GstH264Decoder * self, GstH264SPS * sps)
gint max_dpb_frames;
gint max_dpb_size;
gint prev_max_dpb_size;
gint max_reorder_frames;
gint prev_max_reorder_frames;
gboolean prev_interlaced;
gboolean interlaced;
GstFlowReturn ret = GST_FLOW_OK;
@ -2422,15 +2416,22 @@ gst_h264_decoder_process_sps (GstH264Decoder * self, GstH264SPS * sps)
prev_max_dpb_size = gst_h264_dpb_get_max_num_frames (priv->dpb);
prev_interlaced = gst_h264_dpb_get_interlaced (priv->dpb);
prev_max_reorder_frames = gst_h264_dpb_get_max_num_reorder_frames (priv->dpb);
max_reorder_frames =
gst_h264_decoder_get_max_num_reorder_frames (self, sps, max_dpb_size);
if (priv->width != sps->width || priv->height != sps->height ||
prev_max_dpb_size != max_dpb_size || prev_interlaced != interlaced) {
prev_max_dpb_size != max_dpb_size || prev_interlaced != interlaced ||
prev_max_reorder_frames != max_reorder_frames) {
GstH264DecoderClass *klass = GST_H264_DECODER_GET_CLASS (self);
GST_DEBUG_OBJECT (self,
"SPS updated, resolution: %dx%d -> %dx%d, dpb size: %d -> %d, "
"interlaced %d -> %d",
"interlaced %d -> %d, max_reorder_frames: %d -> %d",
priv->width, priv->height, sps->width, sps->height,
prev_max_dpb_size, max_dpb_size, prev_interlaced, interlaced);
prev_max_dpb_size, max_dpb_size, prev_interlaced, interlaced,
prev_max_reorder_frames, max_reorder_frames);
ret = gst_h264_decoder_drain (GST_VIDEO_DECODER (self));
if (ret != GST_FLOW_OK)
@ -2456,14 +2457,12 @@ gst_h264_decoder_process_sps (GstH264Decoder * self, GstH264SPS * sps)
priv->width = sps->width;
priv->height = sps->height;
gst_h264_decoder_set_latency (self, sps, max_dpb_size);
gst_h264_dpb_set_max_num_frames (priv->dpb, max_dpb_size);
gst_h264_dpb_set_interlaced (priv->dpb, interlaced);
gst_h264_dpb_set_max_num_reorder_frames (priv->dpb, max_reorder_frames);
gst_h264_decoder_set_latency (self, sps, max_dpb_size);
}
gst_h264_dpb_set_max_num_reorder_frames (priv->dpb,
gst_h264_decoder_get_max_num_reorder_frames (self, sps, max_dpb_size));
return GST_FLOW_OK;
}

16
subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.c
View file

@ -280,6 +280,22 @@ gst_h264_dpb_set_max_num_reorder_frames (GstH264Dpb * dpb,
dpb->max_num_reorder_frames = max_num_reorder_frames;
}
/**
* gst_h264_dpb_get_max_num_reorder_frames:
* @dpb: a #GstH264Dpb
*
* Returns: Maximum number of reorder frames
*
* Since: 1.22.2
*/
guint32
gst_h264_dpb_get_max_num_reorder_frames (GstH264Dpb * dpb)
{
g_return_val_if_fail (dpb != NULL, GST_H264_DPB_MAX_SIZE);
return dpb->max_num_reorder_frames;
}
/**
* gst_h264_dpb_add:
* @dpb: a #GstH264Dpb

3
subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.h
View file

@ -249,6 +249,9 @@ GST_CODECS_API
void gst_h264_dpb_set_max_num_reorder_frames (GstH264Dpb * dpb,
guint32 max_num_reorder_frames);
GST_CODECS_API
guint32 gst_h264_dpb_get_max_num_reorder_frames (GstH264Dpb * dpb);
GST_CODECS_API
gboolean gst_h264_dpb_get_interlaced (GstH264Dpb * dpb);