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h265parse: expose compatible profiles to downstream

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Some video bitstreams report a too restrictive set of profiles. If a video
decoder was to strictly follow the indicated profile, it wouldn't support that
stream, whereas it could in theory and in practice. So we should relax the
profile restriction for allowing the decoder to get connected with parser.

https://bugzilla.gnome.org/show_bug.cgi?id=747613
This commit is contained in:
Sreerenj Balachandran 2015-08-07 05:58:22 +03:00 committed by Sebastian Dröge
parent ef7a074fa0
commit 69becd734d
1 changed files with 106 additions and 0 deletions
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106
gst/videoparsers/gsth265parse.c
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@ -1273,6 +1273,109 @@ get_level_string (guint8 level_idc)
}
}
static GstCaps *
get_compatible_profile_caps (GstH265SPS * sps)
{
GstCaps *caps = NULL;
const gchar **profiles = NULL;
gint i;
GValue compat_profiles = G_VALUE_INIT;
g_value_init (&compat_profiles, GST_TYPE_LIST);
switch (sps->profile_tier_level.profile_idc) {
case GST_H265_PROFILE_MAIN_10:
if (sps->profile_tier_level.profile_compatibility_flag[1]) {
if (sps->profile_tier_level.profile_compatibility_flag[3]) {
static const gchar *profile_array[] =
{ "main", "main-still-picture", NULL };
profiles = profile_array;
} else {
static const gchar *profile_array[] = { "main", NULL };
profiles = profile_array;
}
}
break;
case GST_H265_PROFILE_MAIN:
if (sps->profile_tier_level.profile_compatibility_flag[3]) {
static const gchar *profile_array[] =
{ "main-still-picture", "main-10", NULL
};
profiles = profile_array;
} else {
static const gchar *profile_array[] = { "main-10", NULL };
profiles = profile_array;
}
break;
case GST_H265_PROFILE_MAIN_STILL_PICTURE:
{
static const gchar *profile_array[] = { "main", "main-10", NULL
};
profiles = profile_array;
}
break;
default:
break;
}
if (profiles) {
GValue value = G_VALUE_INIT;
caps = gst_caps_new_empty_simple ("video/x-h265");
for (i = 0; profiles[i]; i++) {
g_value_init (&value, G_TYPE_STRING);
g_value_set_string (&value, profiles[i]);
gst_value_list_append_value (&compat_profiles, &value);
g_value_unset (&value);
}
gst_caps_set_value (caps, "profile", &compat_profiles);
g_value_unset (&compat_profiles);
}
return caps;
}
/* if downstream didn't support the exact profile indicated in sps header,
* check for the compatible profiles also */
static void
ensure_caps_profile (GstH265Parse * h265parse, GstCaps * caps, GstH265SPS * sps)
{
GstCaps *filter_caps, *peer_caps, *compat_caps;
filter_caps = gst_caps_new_empty_simple ("video/x-h265");
peer_caps =
gst_pad_peer_query_caps (GST_BASE_PARSE_SRC_PAD (h265parse), filter_caps);
if (peer_caps && !gst_caps_can_intersect (caps, peer_caps)) {
GstStructure *structure;
compat_caps = get_compatible_profile_caps (sps);
if (compat_caps != NULL) {
GstCaps *res_caps = NULL;
res_caps = gst_caps_intersect (peer_caps, compat_caps);
if (res_caps && !gst_caps_is_empty (res_caps)) {
const gchar *profile_str = NULL;
res_caps = gst_caps_fixate (res_caps);
structure = gst_caps_get_structure (res_caps, 0);
profile_str = gst_structure_get_string (structure, "profile");
if (profile_str) {
gst_caps_set_simple (caps, "profile", G_TYPE_STRING, profile_str,
NULL);
GST_DEBUG_OBJECT (h265parse,
"Setting compatible profile %s to the caps", profile_str);
}
}
if (res_caps)
gst_caps_unref (res_caps);
gst_caps_unref (compat_caps);
}
}
if (peer_caps)
gst_caps_unref (peer_caps);
gst_caps_unref (filter_caps);
}
static void
gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
{
@ -1445,6 +1548,9 @@ gst_h265_parse_update_src_caps (GstH265Parse * h265parse, GstCaps * caps)
level = get_level_string (sps->profile_tier_level.level_idc);
if (level != NULL)
gst_caps_set_simple (caps, "level", G_TYPE_STRING, level, NULL);
/* relax the profile constraint to find a suitable decoder */
ensure_caps_profile (h265parse, caps, sps);
}
src_caps = gst_pad_get_current_caps (GST_BASE_PARSE_SRC_PAD (h265parse));