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mpegts: Fix NIT parsing

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The size checks were wrong. The smallest size for a NIT is 16 bytes
(12 for the smallest content + 4 for crc) and the smallest size for
a inner stream loop is 6 bytes (without any descriptors).

Also remove FIXME that has already moved elsewhere
This commit is contained in:
Edward Hervey 2013-07-06 10:38:26 +02:00
parent a3b6b1a951
commit d95bb48864
1 changed files with 4 additions and 22 deletions
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26
gst-libs/gst/mpegts/gst-dvb-section.c
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@ -324,14 +324,14 @@ static GstMpegTsNIT *
_parse_nit (GstMpegTsSection * section)
{
GstMpegTsNIT *nit = NULL;
guint i = 0, j, allocated_streams = 12;
guint i = 0, allocated_streams = 12;
guint8 *data, *end, *entry_begin;
guint16 descriptors_loop_length, transport_stream_loop_length;
GST_DEBUG ("NIT");
/* fixed header + CRC == 16 */
if (section->section_length < 23) {
/* fixed header (no streams) + CRC == 16 */
if (section->section_length < 16) {
GST_WARNING ("PID %d invalid NIT size %d",
section->pid, section->section_length);
goto error;
@ -381,7 +381,7 @@ _parse_nit (GstMpegTsSection * section)
g_ptr_array_add (nit->streams, stream);
if (transport_stream_loop_length < 10) {
if (transport_stream_loop_length < 6) {
/* each entry must be at least 6 bytes (+ 4bytes CRC) */
GST_WARNING ("PID %d invalid NIT entry size %d",
section->pid, transport_stream_loop_length);
@ -415,24 +415,6 @@ _parse_nit (GstMpegTsSection * section)
data += descriptors_loop_length;
/* At least notify the descriptors we are not handling :( */
for (j = 0; j < stream->descriptors->len; j++) {
GstMpegTsDescriptor *desc =
&g_array_index (stream->descriptors, GstMpegTsDescriptor, j);
switch (desc->descriptor_tag) {
case GST_MTS_DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM:
case GST_MTS_DESC_DVB_FREQUENCY_LIST:
GST_FIXME ("Not handling previously handled tag 0x%02x",
desc->descriptor_tag);
break;
default:
GST_LOG ("Not handling tag 0x%02x", desc->descriptor_tag);
break;
}
}
i += 1;
transport_stream_loop_length -= data - entry_begin;
}