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pesfilter: Permit unbounded packets for 0xfd (extended stream id).

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Added parsing of PES extension related data.
Fixes some VC1 related issues.
This commit is contained in:
Josep Torra 2009-07-16 12:03:32 +02:00 committed by Edward Hervey
parent 9deb734631
commit 6303b0e80d
1 changed files with 47 additions and 2 deletions
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49
gst/mpegdemux/gstpesfilter.c
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@ -151,6 +151,7 @@ gst_pes_filter_parse (GstPESFilter * filter)
* to set the allow_unbounded flag if they want */
if (filter->length == 0 &&
((filter->start_code & 0xFFFFFFF0) == PACKET_VIDEO_START_CODE ||
filter->start_code == ID_EXTENDED_STREAM_ID ||
filter->allow_unbounded)) {
GST_DEBUG ("id 0x%02x, unbounded length", filter->id);
filter->unbounded_packet = TRUE;
@ -389,9 +390,53 @@ gst_pes_filter_parse (GstPESFilter * filter)
}
/* PES_extension_flag */
if ((flags & 0x01)) {
GST_DEBUG ("%x PES_extension", filter->id);
flags = *data++;
header_data_length -= 1;
datalen -= 1;
GST_DEBUG ("%x PES_extension, flags 0x%02x", filter->id, flags);
/* PES_private_data_flag */
if ((flags & 0x80)) {
GST_DEBUG ("%x PES_private_data_flag", filter->id);
data += 16;
header_data_length -= 16;
datalen -= 16;
}
/* pack_header_field_flag */
if ((flags & 0x40)) {
guint8 pack_field_length = *data;
GST_DEBUG ("%x pack_header_field_flag, pack_field_length %d",
filter->id, pack_field_length);
data += pack_field_length + 1;
header_data_length -= pack_field_length + 1;
datalen -= pack_field_length + 1;
}
/* program_packet_sequence_counter_flag */
if ((flags & 0x20)) {
GST_DEBUG ("%x program_packet_sequence_counter_flag", filter->id);
data += 2;
header_data_length -= 2;
datalen -= 2;
}
/* P-STD_buffer_flag */
if ((flags & 0x10)) {
GST_DEBUG ("%x P-STD_buffer_flag", filter->id);
data += 2;
header_data_length -= 2;
datalen -= 2;
}
/* PES_extension_flag_2 */
if ((flags & 0x01)) {
guint8 PES_extension_field_length = *data++;
GST_DEBUG ("%x PES_extension_flag_2, len %d",
filter->id, PES_extension_field_length & 0x7f);
if (PES_extension_field_length == 0x81) {
GST_DEBUG ("%x substream id 0x%02x", filter->id, *data);
}
data += PES_extension_field_length & 0x7f;
header_data_length -= (PES_extension_field_length & 0x7f) + 1;
datalen -= (PES_extension_field_length & 0x7f) + 1;
}
}
/* calculate the amount of real data in this PES packet */
data += header_data_length;
datalen -= header_data_length;