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qtdemux: Export h.264 profile in caps

Browse source 
This adds the h.264 profile for a given stream into caps. This can
(eventually) be used to select an appropriate decoder and as metadata
for certain applications.

https://bugzilla.gnome.org/show_bug.cgi?id=614651
This commit is contained in:
Arun Raghavan 2010-04-01 16:58:32 +05:30 committed by Sebastian Dröge
parent 2d6d2a4d95
commit 503f0988bf
1 changed files with 66 additions and 0 deletions
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66
gst/qtdemux/qtdemux.c
View file

@ -5012,6 +5012,59 @@ qtdemux_get_rtsp_uri_from_hndl (GstQTDemux * qtdemux, GNode * minf)
return uri;
}
static gchar *
avc_profile_idc_to_string (gint profile_idc, gint constraint_set_flags)
{
const gchar *profile = NULL;
gint csf1, csf3;
csf1 = (constraint_set_flags & 0x40) >> 6;
csf3 = (constraint_set_flags & 0x10) >> 4;
switch (profile_idc) {
case 66:
if (csf1)
profile = "constrained-baseline";
else
profile = "baseline";
break;
case 77:
profile = "main";
break;
case 88:
profile = "extended";
break;
case 100:
profile = "high";
break;
case 110:
if (csf3)
profile = "high-10-intra";
else
profile = "high-10";
break;
case 122:
if (csf3)
profile = "high-4:2:2-intra";
else
profile = "high-4:2:2";
break;
case 244:
if (csf3)
profile = "high-4:4:4-intra";
else
profile = "high-4:4:4";
break;
case 44:
profile = "cavlc-4:4:4-intra";
break;
default:
return NULL;
}
return g_strdup (profile);
}
/* parse the traks.
* With each track we associate a new QtDemuxStream that contains all the info
* about the trak.
@ -5255,12 +5308,25 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
if (len > 0x8 && QT_FOURCC (avc_data + 0x4) == FOURCC_avcC) {
GstBuffer *buf;
gint size;
gchar *profile;
if (QT_UINT32 (avc_data) < len)
size = QT_UINT32 (avc_data) - 0x8;
else
size = len - 0x8;
if (size >= 3) {
/* First byte is the version, second is the profile indication,
* and third is the 5 contraint_set_flags and 3 reserved bits */
profile = avc_profile_idc_to_string (QT_UINT8 (avc_data + 0x9),
QT_UINT8 (avc_data + 0xA));
if (profile) {
gst_caps_set_simple (stream->caps, "profile", G_TYPE_STRING,
profile, NULL);
g_free (profile);
}
}
GST_DEBUG_OBJECT (qtdemux, "found avcC codec_data in stsd");
buf = gst_buffer_new_and_alloc (size);