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niimaqdxsrc: fix crash with non-4-byte aligned strides, by allocating enough memory

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This commit is contained in:
Joshua M. Doe 2016-08-17 13:36:15 -04:00
parent bfd9a2fcd7
commit e1ee20c4ad
2 changed files with 16 additions and 9 deletions
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23
sys/niimaqdx/gstniimaqdx.c
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@ -564,6 +564,9 @@ gst_niimaqdxsrc_reset (GstNiImaqDxSrc * src)
src->width = 0;
src->height = 0;
src->dx_row_stride = 0;
src->dx_framesize = 0;
src->gst_row_stride = 0;
src->gst_framesize = 0;
src->caps_info = NULL;
src->pixel_format[0] = 0;
@ -642,7 +645,7 @@ gst_niimaqdxsrc_fill (GstPushSrc * psrc, GstBuffer * buf)
GST_LOG_OBJECT (src, "Copying IMAQ buffer #%d, buffersize %d",
src->cumbufnum, gst_buffer_get_size (buf));
do_align_stride = (src->dx_row_stride % src->caps_info->row_multiple) != 0;
do_align_stride = src->dx_row_stride != src->gst_row_stride;
if (!do_align_stride) {
gst_buffer_map (buf, &minfo, GST_MAP_WRITE);
@ -695,9 +698,6 @@ gst_niimaqdxsrc_fill (GstPushSrc * psrc, GstBuffer * buf)
// adjust for row stride if needed (must be multiple of 4)
if (do_align_stride) {
int i;
int dx_row_stride = src->dx_row_stride;
int gst_row_stride =
ROUND_UP_N (dx_row_stride, src->caps_info->row_multiple);
guint8 *tmpbuf = src->temp_buffer;
guint8 *dst;
@ -705,10 +705,11 @@ gst_niimaqdxsrc_fill (GstPushSrc * psrc, GstBuffer * buf)
dst = minfo.data;
GST_LOG_OBJECT (src,
"Row stride not aligned, copying %d -> %d",
dx_row_stride, gst_row_stride);
src->dx_row_stride, src->gst_row_stride);
g_assert (minfo.size >= src->gst_framesize);
for (i = 0; i < src->height; i++)
memcpy (dst + i * gst_row_stride, tmpbuf + i * dx_row_stride,
dx_row_stride);
memcpy (dst + i * src->gst_row_stride, tmpbuf + i * src->dx_row_stride,
src->dx_row_stride);
gst_buffer_unmap (buf, &minfo);
}
@ -1121,8 +1122,12 @@ gst_niimaqdxsrc_set_caps (GstBaseSrc * bsrc, GstCaps * caps)
src->dx_framesize = src->dx_row_stride * src->height;
/* TODO: test stride alignment */
gst_base_src_set_blocksize (bsrc, src->dx_framesize);
src->gst_row_stride =
ROUND_UP_N (src->dx_row_stride, src->caps_info->row_multiple);
src->gst_framesize = src->gst_row_stride * src->height;
gst_base_src_set_blocksize (bsrc, src->gst_framesize);
if (src->temp_buffer)
g_free (src->temp_buffer);

2
sys/niimaqdx/gstniimaqdx.h
View File

@ -71,6 +71,8 @@ struct _GstNiImaqDxSrc {
int height;
int dx_row_stride;
gint dx_framesize;
int gst_row_stride;
gint gst_framesize;
guint8 *temp_buffer;
const ImaqDxCapsInfo *caps_info;