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h265parse: Support for alternate-field interlacing

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Also don't set interlacing information on the caps, see #1313

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1996>
This commit is contained in:
Vivia Nikolaidou 2021-02-03 14:27:14 +02:00
parent 0f084d4624
commit ae66a5772c
2 changed files with 35 additions and 4 deletions
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38
gst/videoparsers/gsth265parse.c
View file

@ -2102,6 +2102,7 @@ gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
gst_caps_set_simple (caps, "width", G_TYPE_INT, width,
"height", G_TYPE_INT, height, NULL);
h265parse->parsed_framerate = FALSE;
/* upstream overrides */
if (s && gst_structure_has_field (s, "framerate"))
gst_structure_get_fraction (s, "framerate", &fps_num, &fps_den);
@ -2121,6 +2122,7 @@ gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
fps_num, fps_den, 0, 0);
val = sps->profile_tier_level.interlaced_source_flag ? GST_SECOND / 2 :
GST_SECOND;
h265parse->parsed_framerate = TRUE;
/* If we know the frame duration, and if we are not in one of the zero
* latency pattern, add one frame of latency */
@ -2200,10 +2202,6 @@ gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
if (profile != NULL)
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile, NULL);
if (sps->profile_tier_level.interlaced_source_flag)
gst_caps_set_simple (caps, "interlace-mode", G_TYPE_STRING,
"interleaved", NULL);
tier = get_tier_string (sps->profile_tier_level.tier_flag);
if (tier != NULL)
gst_caps_set_simple (caps, "tier", G_TYPE_STRING, tier, NULL);
@ -2755,6 +2753,38 @@ gst_h265_parse_pre_push_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
parse_buffer = frame->buffer = gst_buffer_make_writable (frame->buffer);
}
if (h265parse->sei_pic_struct != GST_H265_SEI_PIC_STRUCT_FRAME) {
if (h265parse->parsed_framerate) {
/* If the frame rate doesn't come from upstream (e.g. a muxer), it means
* we must double it, because it's now fields per second */
gint new_fps_n, new_fps_d;
gst_util_fraction_multiply (h265parse->fps_num, h265parse->fps_den, 2, 1,
&new_fps_n, &new_fps_d);
h265parse->fps_num = new_fps_n;
h265parse->fps_den = new_fps_d;
h265parse->parsed_framerate = FALSE;
/* We need to fix the duration of the first frame */
GST_BUFFER_DURATION (parse_buffer) /= 2;
}
GST_BUFFER_FLAG_SET (parse_buffer, GST_VIDEO_BUFFER_FLAG_INTERLACED);
/* h265 doesn't support interleaved */
switch (h265parse->sei_pic_struct) {
case GST_H265_SEI_PIC_STRUCT_TOP_FIELD:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_NEXT_BOTTOM:
case GST_H265_SEI_PIC_STRUCT_TOP_PAIRED_PREVIOUS_BOTTOM:
GST_BUFFER_FLAG_SET (parse_buffer, GST_VIDEO_BUFFER_FLAG_TOP_FIELD);
break;
case GST_H265_SEI_PIC_STRUCT_BOTTOM_FIELD:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_PREVIOUS_TOP:
case GST_H265_SEI_PIC_STRUCT_BOTTOM_PAIRED_NEXT_TOP:
GST_BUFFER_FLAG_SET (parse_buffer, GST_VIDEO_BUFFER_FLAG_BOTTOM_FIELD);
break;
default:
break;
}
}
{
guint i = 0;

1
gst/videoparsers/gsth265parse.h
View file

@ -110,6 +110,7 @@ struct _GstH265Parse
gboolean predicted;
gboolean bidirectional;
gboolean header;
gboolean parsed_framerate;
/* AU state */
gboolean picture_start;