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qtdemux: Check node length of video sample description

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Add check for node length of video sample description and its fields and
for the XiTh atom.

Also unify the code a bit.

https://bugzilla.gnome.org/show_bug.cgi?id=775794
This commit is contained in:
Heekyoung Seo 2016-12-09 20:27:53 +09:00 committed by Sebastian Dröge
parent a5bfaf8a79
commit f7c033f4ec
1 changed files with 41 additions and 64 deletions
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105
gst/isomp4/qtdemux.c
View file

@ -7227,77 +7227,53 @@ qtdemux_parse_node (GstQTDemux * qtdemux, GNode * node, const guint8 * buffer,
case FOURCC_ap4h:
case FOURCC_xvid:
case FOURCC_XVID:
case FOURCC_H264:
case FOURCC_avc1:
case FOURCC_avc3:
case FOURCC_H265:
case FOURCC_hvc1:
case FOURCC_hev1:
case FOURCC_mjp2:
case FOURCC_encv:
{
const guint8 *buf;
guint32 version;
int tlen;
guint32 str_len;
/* codec_data is contained inside these atoms, which all have
* the same format. */
/* video sample description size is 86 bytes without extension.
* node_length have to be bigger than 86 bytes because video sample
* description can include extenstions such as esds, fiel, glbl, etc. */
if (node_length < 86) {
GST_WARNING_OBJECT (qtdemux, "%" GST_FOURCC_FORMAT
" sample description length too short (%u < 86)",
GST_FOURCC_ARGS (fourcc), node_length);
break;
}
GST_DEBUG_OBJECT (qtdemux, "parsing in %" GST_FOURCC_FORMAT,
GST_FOURCC_ARGS (fourcc));
/* version (2 bytes) : this is set to 0, unless a compressor has changed
* its data format.
* revision level (2 bytes) : must be set to 0. */
version = QT_UINT32 (buffer + 16);
GST_DEBUG_OBJECT (qtdemux, "version %08x", version);
if (1 || version == 0x00000000) {
buf = buffer + 0x32;
/* FIXME Quicktime uses PASCAL string while
* the iso format uses C strings. Check the file
* type before attempting to parse the string here. */
tlen = QT_UINT8 (buf);
GST_DEBUG_OBJECT (qtdemux, "tlen = %d", tlen);
buf++;
GST_DEBUG_OBJECT (qtdemux, "string = %.*s", tlen, (char *) buf);
/* the string has a reserved space of 32 bytes so skip
* the remaining 31 */
buf += 31;
buf += 4; /* and 4 bytes reserved */
/* compressor name : PASCAL string and informative purposes
* first byte : the number of bytes to be displayed.
* it has to be less than 32 because it is reserved
* space of 32 bytes total including itself. */
str_len = QT_UINT8 (buffer + 50);
if (str_len < 32)
GST_DEBUG_OBJECT (qtdemux, "compressorname = %.*s", str_len,
(char *) buffer + 51);
else
GST_WARNING_OBJECT (qtdemux,
"compressorname length too big (%u > 31)", str_len);
GST_MEMDUMP_OBJECT (qtdemux, "mp4v", buf, end - buf);
qtdemux_parse_container (qtdemux, node, buf, end);
}
break;
}
case FOURCC_H264:
{
GST_MEMDUMP_OBJECT (qtdemux, "H264", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_avc1:
{
GST_MEMDUMP_OBJECT (qtdemux, "avc1", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_avc3:
{
GST_MEMDUMP_OBJECT (qtdemux, "avc3", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_H265:
{
GST_MEMDUMP_OBJECT (qtdemux, "H265", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_hvc1:
{
GST_MEMDUMP_OBJECT (qtdemux, "hvc1", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_hev1:
{
GST_MEMDUMP_OBJECT (qtdemux, "hev1", buffer, end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 0x56, end);
break;
}
case FOURCC_mjp2:
{
GST_MEMDUMP_OBJECT (qtdemux, "video sample description", buffer,
end - buffer);
qtdemux_parse_container (qtdemux, node, buffer + 86, end);
break;
}
@ -7319,6 +7295,12 @@ qtdemux_parse_node (GstQTDemux * qtdemux, GNode * node, const guint8 * buffer,
guint32 version;
guint32 offset;
if (length < 16) {
GST_LOG_OBJECT (qtdemux, "skipping small %" GST_FOURCC_FORMAT " box",
GST_FOURCC_ARGS (fourcc));
break;
}
version = QT_UINT32 (buffer + 12);
GST_DEBUG_OBJECT (qtdemux, "parsing XiTh atom version 0x%08x", version);
@ -7345,11 +7327,6 @@ qtdemux_parse_node (GstQTDemux * qtdemux, GNode * node, const guint8 * buffer,
qtdemux_parse_uuid (qtdemux, buffer, end - buffer);
break;
}
case FOURCC_encv:
{
qtdemux_parse_container (qtdemux, node, buffer + 86, end);
break;
}
case FOURCC_enca:
{
qtdemux_parse_container (qtdemux, node, buffer + 36, end);