mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-28 06:42:16 +00:00
h264parse: rework PAR parsing
And in the process refactor _update_src_caps a bit
This commit is contained in:
Alessandro Decina
Alessandro Decina
parent
6d85d4882a
commit
21b063a78c
2 changed files with 151 additions and 29 deletions
|
|
@ -193,6 +193,7 @@ gst_h264_parse_reset (GstH264Parse * h264parse)
|
|||
h264parse->height = 0;
|
||||
h264parse->fps_num = 0;
|
||||
h264parse->fps_den = 0;
|
||||
h264parse->aspect_ratio_idc = 0;
|
||||
h264parse->sar_width = 0;
|
||||
h264parse->sar_height = 0;
|
||||
gst_buffer_replace (&h264parse->codec_data, NULL);
|
||||
|
|
@ -813,6 +814,92 @@ gst_h264_parse_make_codec_data (GstH264Parse * h264parse)
|
|||
return buf;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_h264_parse_get_par (GstH264Parse * h264parse, gint * num, gint * den)
|
||||
{
|
||||
gint par_n, par_d;
|
||||
|
||||
par_n = par_d = 0;
|
||||
switch (h264parse->aspect_ratio_idc) {
|
||||
case 0:
|
||||
par_n = par_d = 0;
|
||||
break;
|
||||
case 1:
|
||||
par_n = 1;
|
||||
par_d = 1;
|
||||
break;
|
||||
case 2:
|
||||
par_n = 12;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 3:
|
||||
par_n = 10;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 4:
|
||||
par_n = 16;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 5:
|
||||
par_n = 40;
|
||||
par_d = 33;
|
||||
break;
|
||||
case 6:
|
||||
par_n = 24;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 7:
|
||||
par_n = 20;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 8:
|
||||
par_n = 32;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 9:
|
||||
par_n = 80;
|
||||
par_d = 33;
|
||||
break;
|
||||
case 10:
|
||||
par_n = 18;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 11:
|
||||
par_n = 15;
|
||||
par_d = 11;
|
||||
break;
|
||||
case 12:
|
||||
par_n = 64;
|
||||
par_d = 33;
|
||||
break;
|
||||
case 13:
|
||||
par_n = 160;
|
||||
par_d = 99;
|
||||
break;
|
||||
case 14:
|
||||
par_n = 4;
|
||||
par_d = 3;
|
||||
break;
|
||||
case 15:
|
||||
par_n = 3;
|
||||
par_d = 2;
|
||||
break;
|
||||
case 16:
|
||||
par_n = 2;
|
||||
par_d = 1;
|
||||
break;
|
||||
case 255:
|
||||
par_n = h264parse->sar_width;
|
||||
par_d = h264parse->sar_height;
|
||||
break;
|
||||
default:
|
||||
par_n = par_d = 0;
|
||||
}
|
||||
|
||||
*num = par_n;
|
||||
*den = par_d;
|
||||
}
|
||||
|
||||
static void
|
||||
gst_h264_parse_update_src_caps (GstH264Parse * h264parse, GstCaps * caps)
|
||||
{
|
||||
|
|
@ -861,46 +948,80 @@ gst_h264_parse_update_src_caps (GstH264Parse * h264parse, GstCaps * caps)
|
|||
caps = NULL;
|
||||
if (G_UNLIKELY (!sps)) {
|
||||
caps = gst_caps_copy (sink_caps);
|
||||
} else if (G_UNLIKELY (h264parse->width != sps->width ||
|
||||
h264parse->height != sps->height || h264parse->fps_num != sps->fps_num
|
||||
|| h264parse->fps_den != sps->fps_den ||
|
||||
h264parse->sar_width != sps->vui_parameters.sar_width ||
|
||||
h264parse->sar_height != sps->vui_parameters.sar_height
|
||||
|| modified)) {
|
||||
caps = gst_caps_copy (sink_caps);
|
||||
/* sps should give this */
|
||||
gst_caps_set_simple (caps, "width", G_TYPE_INT, sps->width,
|
||||
"height", G_TYPE_INT, sps->height, NULL);
|
||||
h264parse->height = sps->height;
|
||||
h264parse->width = sps->width;
|
||||
/* but not necessarily or reliably this */
|
||||
if ((!h264parse->fps_num || !h264parse->fps_den) &&
|
||||
sps->fps_num > 0 && sps->fps_den > 0) {
|
||||
gst_caps_set_simple (caps, "framerate",
|
||||
GST_TYPE_FRACTION, sps->fps_num, sps->fps_den, NULL);
|
||||
h264parse->fps_num = sps->fps_num;
|
||||
h264parse->fps_den = sps->fps_den;
|
||||
gst_base_parse_set_frame_rate (GST_BASE_PARSE (h264parse),
|
||||
h264parse->fps_num, h264parse->fps_den, 0, 0);
|
||||
} else {
|
||||
if (G_UNLIKELY (h264parse->width != sps->width ||
|
||||
h264parse->height != sps->height)) {
|
||||
GST_INFO_OBJECT (h264parse, "resolution changed %dx%d",
|
||||
sps->width, sps->height);
|
||||
h264parse->width = sps->width;
|
||||
h264parse->height = sps->height;
|
||||
modified = TRUE;
|
||||
}
|
||||
if ((sps->vui_parameters.sar_width > 0 &&
|
||||
sps->vui_parameters.sar_height > 0) &&
|
||||
(h264parse->sar_width != sps->vui_parameters.sar_width ||
|
||||
h264parse->sar_height != sps->vui_parameters.sar_height)) {
|
||||
h264parse->sar_width = sps->vui_parameters.sar_width;
|
||||
h264parse->sar_height = sps->vui_parameters.sar_height;
|
||||
|
||||
/* 0/1 is set as the default in the codec parser */
|
||||
if (sps->vui_parameters.timing_info_present_flag &&
|
||||
!(sps->fps_num == 0 && sps->fps_den == 1)) {
|
||||
if (G_UNLIKELY (h264parse->fps_num != sps->fps_num
|
||||
|| h264parse->fps_den != sps->fps_den)) {
|
||||
GST_INFO_OBJECT (h264parse, "framerate changed %d/%d",
|
||||
sps->fps_num, sps->fps_den);
|
||||
h264parse->fps_num = sps->fps_num;
|
||||
h264parse->fps_den = sps->fps_den;
|
||||
gst_base_parse_set_frame_rate (GST_BASE_PARSE (h264parse),
|
||||
h264parse->fps_num, h264parse->fps_den, 0, 0);
|
||||
modified = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
if (sps->vui_parameters.aspect_ratio_info_present_flag) {
|
||||
if (G_UNLIKELY (h264parse->aspect_ratio_idc !=
|
||||
sps->vui_parameters.aspect_ratio_idc)) {
|
||||
h264parse->aspect_ratio_idc = sps->vui_parameters.aspect_ratio_idc;
|
||||
GST_INFO_OBJECT (h264parse, "aspect ratio idc changed %d",
|
||||
h264parse->aspect_ratio_idc);
|
||||
modified = TRUE;
|
||||
}
|
||||
|
||||
/* 255 means sar_width and sar_height present */
|
||||
if (G_UNLIKELY (sps->vui_parameters.aspect_ratio_idc == 255 &&
|
||||
(h264parse->sar_width != sps->vui_parameters.sar_width ||
|
||||
h264parse->sar_height != sps->vui_parameters.sar_height))) {
|
||||
h264parse->sar_width = sps->vui_parameters.sar_width;
|
||||
h264parse->sar_height = sps->vui_parameters.sar_height;
|
||||
GST_INFO_OBJECT (h264parse, "aspect ratio SAR changed %d/%d",
|
||||
h264parse->sar_width, h264parse->sar_height);
|
||||
modified = TRUE;
|
||||
}
|
||||
}
|
||||
|
||||
if (G_UNLIKELY (modified)) {
|
||||
caps = gst_caps_copy (sink_caps);
|
||||
/* sps should give this */
|
||||
gst_caps_set_simple (caps, "width", G_TYPE_INT, sps->width,
|
||||
"height", G_TYPE_INT, sps->height, NULL);
|
||||
/* but not necessarily or reliably this */
|
||||
if (h264parse->fps_num > 0 && h264parse->fps_den > 0)
|
||||
gst_caps_set_simple (caps, "framerate",
|
||||
GST_TYPE_FRACTION, sps->fps_num, sps->fps_den, NULL);
|
||||
}
|
||||
}
|
||||
|
||||
if (caps) {
|
||||
gint par_n, par_d;
|
||||
|
||||
gst_caps_set_simple (caps, "parsed", G_TYPE_BOOLEAN, TRUE,
|
||||
"stream-format", G_TYPE_STRING,
|
||||
gst_h264_parse_get_string (h264parse, TRUE, h264parse->format),
|
||||
"alignment", G_TYPE_STRING,
|
||||
gst_h264_parse_get_string (h264parse, FALSE, h264parse->align), NULL);
|
||||
if (h264parse->sar_width > 0 && h264parse->sar_height > 0)
|
||||
|
||||
gst_h264_parse_get_par (h264parse, &par_n, &par_d);
|
||||
if (par_n != 0 && par_d != 0) {
|
||||
GST_INFO_OBJECT (h264parse, "PAR %d/%d", par_n, par_d);
|
||||
gst_caps_set_simple (caps, "pixel-aspect-ratio", GST_TYPE_FRACTION,
|
||||
h264parse->sar_width, h264parse->sar_height, NULL);
|
||||
par_n, par_d, NULL);
|
||||
}
|
||||
|
||||
if (buf) {
|
||||
gst_caps_set_simple (caps, "codec_data", GST_TYPE_BUFFER, buf, NULL);
|
||||
gst_buffer_replace (&h264parse->codec_data, buf);
|
||||
|
|
|
|||
|
|
@ -58,6 +58,7 @@ struct _GstH264Parse
|
|||
/* stream */
|
||||
gint width, height;
|
||||
gint fps_num, fps_den;
|
||||
gint aspect_ratio_idc;
|
||||
gint sar_width, sar_height;
|
||||
GstBuffer *codec_data;
|
||||
guint nal_length_size;
|
||||
|
|
|
|||
Loading…
Reference in a new issue