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mpegtsbase/packetizer: Add CAT section handling

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Allows reporting the global EMM
This commit is contained in:
Edward Hervey 2012-06-03 10:56:28 +02:00
parent dfe6863387
commit 63f8b970af
3 changed files with 75 additions and 0 deletions
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19
gst/mpegtsdemux/mpegtsbase.c
View file

@ -1011,6 +1011,16 @@ same_program:
}
}
static void
mpegts_base_apply_cat (MpegTSBase * base, GstStructure * cat_info)
{
GST_DEBUG_OBJECT (base, "CAT %" GST_PTR_FORMAT, cat_info);
gst_element_post_message (GST_ELEMENT_CAST (base),
gst_message_new_element (GST_OBJECT (base),
gst_structure_copy (cat_info)));
}
static void
mpegts_base_apply_nit (MpegTSBase * base,
guint16 pmt_pid, GstStructure * nit_info)
@ -1099,7 +1109,16 @@ mpegts_base_handle_psi (MpegTSBase * base, MpegTSPacketizerSection * section)
res = FALSE;
break;
case 0x01:
/* CAT */
structure = mpegts_packetizer_parse_cat (base->packetizer, section);
if (structure)
mpegts_base_apply_cat (base, structure);
else
res = FALSE;
break;
case 0x02:
/* PMT */
structure = mpegts_packetizer_parse_pmt (base->packetizer, section);
if (G_LIKELY (structure))
mpegts_base_apply_pmt (base, section->pid, structure);

54
gst/mpegtsdemux/mpegtspacketizer.c
View file

@ -48,6 +48,8 @@ static GQuark QUARK_PROGRAM_NUMBER;
static GQuark QUARK_PID;
static GQuark QUARK_PROGRAMS;
static GQuark QUARK_CAT;
static GQuark QUARK_PMT;
static GQuark QUARK_PCR_PID;
static GQuark QUARK_VERSION_NUMBER;
@ -522,6 +524,56 @@ error:
return FALSE;
}
GstStructure *
mpegts_packetizer_parse_cat (MpegTSPacketizer2 * packetizer,
MpegTSPacketizerSection * section)
{
GstStructure *cat_info = NULL;
guint8 *data;
guint8 tmp;
GValueArray *descriptors;
GstMPEGDescriptor *desc;
guint desc_len;
/* Skip parts already parsed */
data = section->data + 3;
/* reserved : 18bits */
data += 2;
/* version_number : 5 bits
* current_next_indicator : 1 bit */
tmp = *data++;
section->version_number = (tmp >> 1) & 0x1F;
section->current_next_indicator = tmp & 0x01;
/* skip already handled section_number and last_section_number */
data += 2;
cat_info = gst_structure_new_id_empty (QUARK_CAT);
/* descriptors */
desc_len = section->section_length - 4 - 8;
desc = gst_mpeg_descriptor_parse (data, desc_len);
if (desc)
gst_mpeg_descriptor_free (desc);
descriptors = g_value_array_new (0);
if (!mpegts_packetizer_parse_descriptors (packetizer, &data, data + desc_len,
descriptors)) {
g_value_array_free (descriptors);
goto error;
}
gst_structure_id_set (cat_info, QUARK_DESCRIPTORS, G_TYPE_VALUE_ARRAY,
descriptors, NULL);
g_value_array_free (descriptors);
return cat_info;
error:
if (cat_info)
gst_structure_free (cat_info);
return NULL;
}
GstStructure *
mpegts_packetizer_parse_pat (MpegTSPacketizer2 * packetizer,
MpegTSPacketizerSection * section)
@ -2579,6 +2631,8 @@ _init_local (void)
QUARK_PID = g_quark_from_string ("pid");
QUARK_PROGRAMS = g_quark_from_string ("programs");
QUARK_CAT = g_quark_from_string ("pat");
QUARK_PMT = g_quark_from_string ("pmt");
QUARK_PCR_PID = g_quark_from_string ("pcr-pid");
QUARK_VERSION_NUMBER = g_quark_from_string ("version-number");

2
gst/mpegtsdemux/mpegtspacketizer.h
View file

@ -192,6 +192,8 @@ void mpegts_packetizer_remove_stream(MpegTSPacketizer2 *packetizer,
gboolean mpegts_packetizer_push_section (MpegTSPacketizer2 *packetzer,
MpegTSPacketizerPacket *packet, MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_cat (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_pat (MpegTSPacketizer2 *packetizer,
MpegTSPacketizerSection *section);
GstStructure *mpegts_packetizer_parse_pmt (MpegTSPacketizer2 *packetizer,