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wtv: permit root table and first sectors to be located beyond 2GB boundary 

Fixes ticket #2025.

Signed-off-by: Peter Ross <pross@xvid.org>
This commit is contained in:
Peter Ross 2012-12-18 00:42:13 +11:00
parent ebfb738fa4
commit 95015634f5
2 changed files with 5 additions and 6 deletions
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4
libavformat/wtvdec.c
View File

@ -149,7 +149,7 @@ static AVIOContext * wtvfile_open_sector(int first_sector, uint64_t length, int
WtvFile *wf;
uint8_t *buffer;
if (avio_seek(s->pb, first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
if (avio_seek(s->pb, (int64_t)first_sector << WTV_SECTOR_BITS, SEEK_SET) < 0)
return NULL;
wf = av_mallocz(sizeof(WtvFile));
@ -922,7 +922,7 @@ static int read_header(AVFormatContext *s)
avio_skip(s->pb, 4);
root_sector = avio_rl32(s->pb);
avio_seek(s->pb, root_sector << WTV_SECTOR_BITS, SEEK_SET);
avio_seek(s->pb, (int64_t)root_sector << WTV_SECTOR_BITS, SEEK_SET);
root_size = avio_read(s->pb, root, root_size);
if (root_size < 0)
return AVERROR_INVALIDDATA;

7
libavformat/wtvenc.c
View File

@ -546,7 +546,7 @@ static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shi
write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
}
static int write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
{
int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
int shift = sector_bits - WTV_SECTOR_BITS;
@ -672,11 +672,10 @@ static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t star
//write fat table
if (w->depth > 0) {
w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth);
w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth) >> WTV_SECTOR_BITS;
} else {
w->first_sector = start_pos;
w->first_sector = start_pos >> WTV_SECTOR_BITS;
}
w->first_sector >>= WTV_SECTOR_BITS;
w->length |= 1ULL<<60;
if (sector_bits == WTV_SECTOR_BITS)