mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-30 12:10:37 +00:00
Code Issues 1 Projects Releases Wiki Activity

gst/mpegtsparse/: Add parsing of cable delivery system descriptor.

Browse source 
Original commit message from CVS:
* gst/mpegtsparse/gstmpegdesc.h:
* gst/mpegtsparse/mpegtspacketizer.c:
Add parsing of cable delivery system descriptor.
This commit is contained in:
Zaheer Abbas Merali 2008-03-04 17:49:15 +00:00
parent d6f82ebffc
commit 15ac9f5a13
4 changed files with 101 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
ChangeLog
View file

@ -1,3 +1,9 @@
2008-03-04 Zaheer Abbas Merali <zaheerabbas at merali dot org>
* gst/mpegtsparse/gstmpegdesc.h:
* gst/mpegtsparse/mpegtspacketizer.c:
Add parsing of cable delivery system descriptor.
2008-03-03 Peter Kjellerstedt <pkj@axis.com>
* configure.ac:

2
common

@ -1 +1 @@
Subproject commit 668c3f0b72d50813c30eb04be7048f638037c571
Subproject commit e02bd43fe6b9e45536eccbf5b7a5f9eae62030fd

7
gst/mpegtsparse/gstmpegdesc.h
View file

@ -286,6 +286,13 @@
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_transmission_mode(desc) (desc[8] & 0x06)
#define DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM_other_frequency(desc) ((desc[8] & 0x01) == 0x01)
/* DVB Cable Delivery System Descriptor */
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_frequency(desc) (desc + 2)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_fec_outer(desc) (desc[7] & 0x0F)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_modulation(desc) (desc[8])
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_symbol_rate(desc) (desc + 9)
#define DESC_DVB_CABLE_DELIVERY_SYSTEM_fec_inner(desc) (desc[12] & 0x0F)
typedef struct {
guint n_desc;
guint8 data_length;

87
gst/mpegtsparse/mpegtspacketizer.c
View file

@ -935,6 +935,93 @@ mpegts_packetizer_parse_nit (MpegTSPacketizer * packetizer,
"other-frequency", G_TYPE_BOOLEAN, other_frequency, NULL);
gst_structure_set (transport, "delivery", GST_TYPE_STRUCTURE,
delivery_structure, NULL);
} else if ((delivery =
gst_mpeg_descriptor_find (mpegdescriptor,
DESC_DVB_CABLE_DELIVERY_SYSTEM))) {
guint8 *frequency_bcd =
DESC_DVB_CABLE_DELIVERY_SYSTEM_frequency (delivery);
guint32 frequency =
10 * ((frequency_bcd[3] & 0x0F) +
10 * ((frequency_bcd[3] & 0xF0) >> 4) +
100 * (frequency_bcd[2] & 0x0F) +
1000 * ((frequency_bcd[2] & 0xF0) >> 4) +
10000 * (frequency_bcd[1] & 0x0F) +
100000 * ((frequency_bcd[1] & 0xF0) >> 4) +
1000000 * (frequency_bcd[0] & 0x0F) +
10000000 * ((frequency_bcd[0] & 0xF0) >> 4));
guint8 modulation =
DESC_DVB_CABLE_DELIVERY_SYSTEM_modulation (delivery);
gchar *modulation_str;
guint8 *symbol_rate_bcd =
DESC_DVB_CABLE_DELIVERY_SYSTEM_symbol_rate (delivery);
guint32 symbol_rate =
(symbol_rate_bcd[2] & 0x0F) +
10 * ((symbol_rate_bcd[2] & 0xF0) >> 4) +
100 * (symbol_rate_bcd[1] & 0x0F) +
1000 * ((symbol_rate_bcd[1] & 0xF0) >> 4) +
10000 * (symbol_rate_bcd[0] & 0x0F) +
100000 * ((symbol_rate_bcd[0] & 0xF0) >> 4);
guint8 fec_inner = DESC_DVB_CABLE_DELIVERY_SYSTEM_fec_inner (delivery);
gchar *fec_inner_str;
switch (fec_inner) {
case 0:
fec_inner_str = "undefined";
break;
case 1:
fec_inner_str = "1/2";
break;
case 2:
fec_inner_str = "2/3";
break;
case 3:
fec_inner_str = "3/4";
break;
case 4:
fec_inner_str = "5/6";
break;
case 5:
fec_inner_str = "7/8";
break;
case 6:
fec_inner_str = "8/9";
break;
case 0xF:
fec_inner_str = "none";
break;
default:
fec_inner_str = "reserved";
}
switch (modulation) {
case 0x00:
modulation_str = "undefined";
break;
case 0x01:
modulation_str = "QAM16";
break;
case 0x02:
modulation_str = "QAM32";
break;
case 0x03:
modulation_str = "QAM64";
break;
case 0x04:
modulation_str = "QAM128";
break;
case 0x05:
modulation_str = "QAM256";
break;
default:
modulation_str = "reserved";
}
delivery_structure = gst_structure_new ("cable",
"modulation", G_TYPE_STRING, modulation_str,
"frequency", G_TYPE_UINT, frequency,
"symbol-rate", G_TYPE_UINT, symbol_rate,
"inner-fec", G_TYPE_STRING, fec_inner_str, NULL);
gst_structure_set (transport, "delivery", GST_TYPE_STRUCTURE,
delivery_structure, NULL);
}
if ((delivery =
gst_mpeg_descriptor_find (mpegdescriptor,