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ebml-read: Zero-sized ints/uints/floats have a value of 0 according to the EBML spec

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This commit is contained in:
Sebastian Dröge 2010-06-16 21:02:13 +02:00
parent e4a5f0911e
commit f44e5e630b
1 changed files with 18 additions and 4 deletions
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22
gst/matroska/ebml-read.c
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@ -394,13 +394,19 @@ gst_ebml_read_uint (GstEbmlRead * ebml, guint32 * id, guint64 * num)
if (ret != GST_FLOW_OK)
return ret;
if (size < 1 || size > 8) {
if (size > 8) {
GST_ERROR_OBJECT (ebml->el,
"Invalid integer element size %d at position %" G_GUINT64_FORMAT " (0x%"
G_GINT64_MODIFIER "x)", size, gst_ebml_read_get_pos (ebml) - size,
gst_ebml_read_get_pos (ebml) - size);
return GST_FLOW_ERROR;
}
if (size == 0) {
*num = 0;
return ret;
}
*num = 0;
while (size > 0) {
*num = (*num << 8) | *data;
@ -427,7 +433,7 @@ gst_ebml_read_sint (GstEbmlRead * ebml, guint32 * id, gint64 * num)
if (ret != GST_FLOW_OK)
return ret;
if (size < 1 || size > 8) {
if (size > 8) {
GST_ERROR_OBJECT (ebml->el,
"Invalid integer element size %d at position %" G_GUINT64_FORMAT " (0x%"
G_GINT64_MODIFIER "x)", size, gst_ebml_read_get_pos (ebml) - size,
@ -435,6 +441,11 @@ gst_ebml_read_sint (GstEbmlRead * ebml, guint32 * id, gint64 * num)
return GST_FLOW_ERROR;
}
if (size == 0) {
*num = 0;
return ret;
}
*num = 0;
if (*data & 0x80) {
negative = 1;
@ -505,7 +516,7 @@ gst_ebml_read_float (GstEbmlRead * ebml, guint32 * id, gdouble * num)
if (ret != GST_FLOW_OK)
return ret;
if (size != 4 && size != 8 && size != 10) {
if (size != 0 && size != 4 && size != 8 && size != 10) {
GST_ERROR_OBJECT (ebml->el,
"Invalid float element size %d at position %" G_GUINT64_FORMAT " (0x%"
G_GINT64_MODIFIER "x)", size, gst_ebml_read_get_pos (ebml) - size,
@ -527,8 +538,11 @@ gst_ebml_read_float (GstEbmlRead * ebml, guint32 * id, gdouble * num)
d = GDOUBLE_FROM_BE (d);
*num = d;
} else {
} else if (size == 10) {
*num = _ext2dbl (data);
} else {
/* size == 0 means a value of 0.0 */
*num = 0.0;
}
return ret;