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mxfenc: Fix possible integer overflows

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None of these are likely unless the user is writing a file with two billion
streams or a duration of around two months.

This fixes CIDs 700568, 700569, 700570, 700571, 700572 and 700573.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Tomas Härdin 2012-10-24 17:06:49 +02:00 committed by Michael Niedermayer
parent fbb39f44f1
commit e3ba817b95
1 changed files with 6 additions and 6 deletions
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12
libavformat/mxfenc.c
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@ -550,7 +550,7 @@ static void mxf_write_preface(AVFormatContext *s)
mxf_write_metadata_key(pb, 0x012f00);
PRINT_KEY(s, "preface key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 130 + 16 * mxf->essence_container_count);
klv_encode_ber_length(pb, 130 + 16LL * mxf->essence_container_count);
// write preface set uid
mxf_write_local_tag(pb, 16, 0x3C0A);
@ -823,7 +823,7 @@ static void mxf_write_multi_descriptor(AVFormatContext *s)
mxf_write_metadata_key(pb, 0x014400);
PRINT_KEY(s, "multiple descriptor key", pb->buf_ptr - 16);
klv_encode_ber_length(pb, 64 + 16 * s->nb_streams);
klv_encode_ber_length(pb, 64 + 16LL * s->nb_streams);
mxf_write_local_tag(pb, 16, 0x3C0A);
mxf_write_uuid(pb, MultipleDescriptor, 0);
@ -1165,8 +1165,8 @@ static void mxf_write_index_table_segment(AVFormatContext *s)
if (mxf->edit_unit_byte_count) {
klv_encode_ber_length(pb, 80);
} else {
klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1)*6 +
12+mxf->edit_units_count*(11+mxf->slice_count*4));
klv_encode_ber_length(pb, 85 + 12+(s->nb_streams+1LL)*6 +
12+mxf->edit_units_count*(11+mxf->slice_count*4LL));
}
// instance id
@ -1326,7 +1326,7 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
// write klv
avio_write(pb, key, 16);
klv_encode_ber_length(pb, 88 + 16 * mxf->essence_container_count);
klv_encode_ber_length(pb, 88 + 16LL * mxf->essence_container_count);
// write partition value
avio_wb16(pb, 1); // majorVersion
@ -2004,7 +2004,7 @@ static void mxf_write_random_index_pack(AVFormatContext *s)
int i;
avio_write(pb, random_index_pack_key, 16);
klv_encode_ber_length(pb, 28 + 12*mxf->body_partitions_count);
klv_encode_ber_length(pb, 28 + 12LL*mxf->body_partitions_count);
if (mxf->edit_unit_byte_count)
avio_wb32(pb, 1); // BodySID of header partition