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mkvparser: ignore 0-size elements in TrackEntry

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ParseTrackEntry handled MKVs with 0-sized EBML elements
as malformed. Relaxing this and allow empty elements to allow
parsing such MKV content.

Change-Id: I7e430e9b2d177df7fe1e656546f63ee8673e784e
This commit is contained in:
David Schalig
2012-11-28 12:18:32 +09:00
parent 28222b4927
commit 2b09f9b53a
1 changed files with 22 additions and 28 deletions
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20
mkvparser.cpp
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@@ -6533,35 +6533,29 @@ long Tracks::ParseTrackEntry(
if (status < 0) //error
return status;
if (size < 0)
return E_FILE_FORMAT_INVALID;
const long long start = pos;
if (id == 0x60) // VideoSettings ID
{
if (size <= 0)
return E_FILE_FORMAT_INVALID;
v.start = start;
v.size = size;
}
else if (id == 0x61) // AudioSettings ID
{
if (size <= 0)
return E_FILE_FORMAT_INVALID;
a.start = start;
a.size = size;
}
else if (id == 0x2D80) // ContentEncodings ID
{
if (size <= 0)
return E_FILE_FORMAT_INVALID;
e.start = start;
e.size = size;
}
else if (id == 0x33C5) //Track UID
{
if ((size <= 0) || (size > 8))
if (size > 8)
return E_FILE_FORMAT_INVALID;
info.uid = 0;
@@ -6637,11 +6631,10 @@ long Tracks::ParseTrackEntry(
info.codecPrivate = NULL;
info.codecPrivateSize = 0;
if (size <= 0)
return E_FILE_FORMAT_INVALID;
const size_t buflen = static_cast<size_t>(size);
if (buflen)
{
typedef unsigned char* buf_t;
const buf_t buf = new (std::nothrow) unsigned char[buflen];
@@ -6660,6 +6653,7 @@ long Tracks::ParseTrackEntry(
info.codecPrivate = buf;
info.codecPrivateSize = buflen;
}
}
else if (id == 0x058688) //Codec Name
{
const long status = UnserializeString(