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qtdemux: Export h.264 level in caps

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This exports the h.264 level in the stream caps (as a string) which can
be used to match a decoder, or as metadata.

https://bugzilla.gnome.org/show_bug.cgi?id=614651
This commit is contained in:
Arun Raghavan 2010-04-01 18:17:09 +05:30 committed by Sebastian Dröge
parent 503f0988bf
commit d6dcd70b4c
1 changed files with 37 additions and 1 deletions
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38
gst/qtdemux/qtdemux.c
View file

@ -49,6 +49,7 @@
#include "gst/gst-i18n-plugin.h"
#include <glib/gprintf.h>
#include <gst/tag/tag.h>
#include "qtatomparser.h"
@ -5065,6 +5066,30 @@ avc_profile_idc_to_string (gint profile_idc, gint constraint_set_flags)
return g_strdup (profile);
}
static gchar *
avc_level_idc_to_string (gint level_idc, gint constraint_set_flags)
{
const gchar *level = NULL;
gchar buf[4];
gint csf3;
csf3 = (constraint_set_flags & 0x10) >> 4;
if (level_idc == 11 && csf3)
level = "1b";
else {
/* Level is (level_idc / 10) */
if (level_idc % 10 == 0)
g_sprintf (buf, "%d", level_idc / 10);
else
g_sprintf (buf, "%d.%d", level_idc / 10, level_idc % 10);
level = buf;
}
return g_strdup (level);
}
/* parse the traks.
* With each track we associate a new QtDemuxStream that contains all the info
* about the trak.
@ -5308,7 +5333,7 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
if (len > 0x8 && QT_FOURCC (avc_data + 0x4) == FOURCC_avcC) {
GstBuffer *buf;
gint size;
gchar *profile;
gchar *profile, *level;
if (QT_UINT32 (avc_data) < len)
size = QT_UINT32 (avc_data) - 0x8;
@ -5327,6 +5352,17 @@ qtdemux_parse_trak (GstQTDemux * qtdemux, GNode * trak)
}
}
if (size >= 4) {
/* Fourth byte is the level indication */
level = avc_level_idc_to_string (QT_UINT8 (avc_data + 0xB),
QT_UINT8 (avc_data + 0xA));
if (level) {
gst_caps_set_simple (stream->caps, "level", G_TYPE_STRING,
level, NULL);
g_free (level);
}
}
GST_DEBUG_OBJECT (qtdemux, "found avcC codec_data in stsd");
buf = gst_buffer_new_and_alloc (size);