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mpegts: Avoid false-positives in section type detection

Browse source 
Due to the variety of section types out there, we need to add
some checks when identifying section types.

We check here that the PID is also consistent with the table_id.
This commit is contained in:
Edward Hervey 2013-07-07 08:35:02 +02:00
parent f58f13e874
commit f3d53fcd97
1 changed files with 24 additions and 10 deletions
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34
gst-libs/gst/mpegts/gstmpegtssection.c
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@ -272,7 +272,7 @@ gst_message_new_mpegts_section (GstObject * parent, GstMpegTsSection * section)
quark = QUARK_TOT;
break;
default:
GST_WARNING ("Creating message for unknown GstMpegTsSection");
GST_DEBUG ("Creating message for unknown GstMpegTsSection");
quark = QUARK_SECTION;
break;
}
@ -654,11 +654,13 @@ gst_mpegts_initialize (void)
/* FIXME : Later on we might need to use more than just the table_id
* to figure out which type of section this is. */
static GstMpegTsSectionType
_identify_section (guint8 table_id)
_identify_section (guint16 pid, guint8 table_id)
{
switch (table_id) {
case GST_MTS_TABLE_ID_PROGRAM_ASSOCIATION:
return GST_MPEGTS_SECTION_PAT;
if (pid == 0x00)
return GST_MPEGTS_SECTION_PAT;
break;
case GST_MTS_TABLE_ID_CONDITIONAL_ACCESS:
return GST_MPEGTS_SECTION_CAT;
case GST_MTS_TABLE_ID_TS_PROGRAM_MAP:
@ -667,22 +669,34 @@ _identify_section (guint8 table_id)
return GST_MPEGTS_SECTION_BAT;
case GST_MTS_TABLE_ID_NETWORK_INFORMATION_ACTUAL_NETWORK:
case GST_MTS_TABLE_ID_NETWORK_INFORMATION_OTHER_NETWORK:
return GST_MPEGTS_SECTION_NIT;
if (pid == 0x0010)
return GST_MPEGTS_SECTION_NIT;
break;
case GST_MTS_TABLE_ID_SERVICE_DESCRIPTION_ACTUAL_TS:
case GST_MTS_TABLE_ID_SERVICE_DESCRIPTION_OTHER_TS:
return GST_MPEGTS_SECTION_SDT;
if (pid == 0x0011)
return GST_MPEGTS_SECTION_SDT;
break;
case GST_MTS_TABLE_ID_TIME_DATE:
return GST_MPEGTS_SECTION_TDT;
if (pid == 0x0014)
return GST_MPEGTS_SECTION_TDT;
break;
case GST_MTS_TABLE_ID_TIME_OFFSET:
return GST_MPEGTS_SECTION_TOT;
if (pid == 0x0014)
return GST_MPEGTS_SECTION_TOT;
break;
/* FIXME : FILL */
default:
/* Handle ranges */
if (table_id >= GST_MTS_TABLE_ID_EVENT_INFORMATION_ACTUAL_TS_PRESENT &&
table_id <= GST_MTS_TABLE_ID_EVENT_INFORMATION_OTHER_TS_SCHEDULE_N)
return GST_MPEGTS_SECTION_EIT;
table_id <= GST_MTS_TABLE_ID_EVENT_INFORMATION_OTHER_TS_SCHEDULE_N) {
if (pid == 0x0012)
return GST_MPEGTS_SECTION_EIT;
}
return GST_MPEGTS_SECTION_UNKNOWN;
}
return GST_MPEGTS_SECTION_UNKNOWN;
}
/**
@ -750,7 +764,7 @@ gst_mpegts_section_new (guint16 pid, guint8 * data, gsize data_size)
res->last_section_number = *data;
}
res->section_type = _identify_section (res->table_id);
res->section_type = _identify_section (res->pid, res->table_id);
return res;