static GstFlowReturn
gst_geometric_transform_transform (GstBaseTransform * trans, GstBuffer * buf,
GstBuffer * outbuf)
{
GstGeometricTransform *gt;
GstGeometricTransformClass *klass;
gint x, y;
GstFlowReturn ret = GST_FLOW_OK;
gdouble *ptr;
gt = GST_GEOMETRIC_TRANSFORM_CAST (trans);
klass = GST_GEOMETRIC_TRANSFORM_GET_CLASS (gt);
memset (GST_BUFFER_DATA (outbuf), 0, GST_BUFFER_SIZE (outbuf));
GST_OBJECT_LOCK (gt);
if (gt->precalc_map) {
if (gt->needs_remap) {
if (klass->prepare_func)
if (!klass->prepare_func (gt)) {
GST_OBJECT_UNLOCK (gt);
return FALSE;
}
gst_geometric_transform_generate_map (gt);
}
g_return_val_if_fail (gt->map, GST_FLOW_ERROR);
ptr = gt->map;
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
/* do the mapping */
gst_geometric_transform_do_map (gt, buf, outbuf, x, y, ptr[0], ptr[1]);
ptr += 2;
}
}
} else {
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
gdouble in_x, in_y;
if (klass->map_func (gt, x, y, &in_x, &in_y)) {
gst_geometric_transform_do_map (gt, buf, outbuf, x, y, in_x, in_y);
} else {
GST_WARNING_OBJECT (gt, "Failed to do mapping for %d %d", x, y);
ret = GST_FLOW_ERROR;
goto end;
}
}
}
}
end:
GST_OBJECT_UNLOCK (gt);
return ret;
}
/* must be called with the object lock */
static gboolean
gst_geometric_transform_generate_map (GstGeometricTransform * gt)
{
gint x, y;
gdouble in_x, in_y;
gboolean ret = TRUE;
GstGeometricTransformClass *klass;
gdouble *ptr;
GST_INFO_OBJECT (gt, "Generating new transform map");
/* cleanup old map */
g_free (gt->map);
gt->map = NULL;
klass = GST_GEOMETRIC_TRANSFORM_GET_CLASS (gt);
/* subclass must have defined the map_func */
g_return_val_if_fail (klass->map_func, FALSE);
/*
* (x,y) pairs of the inverse mapping
*/
gt->map = g_malloc0 (sizeof (gdouble) * gt->width * gt->height * 2);
ptr = gt->map;
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
if (!klass->map_func (gt, x, y, &in_x, &in_y)) {
/* child should have warned */
ret = FALSE;
goto end;
}
ptr[0] = in_x;
ptr[1] = in_y;
ptr += 2;
}
}
end:
if (!ret) {
GST_WARNING_OBJECT (gt, "Generating transform map failed");
g_free (gt->map);
gt->map = NULL;
} else
gt->needs_remap = FALSE;
return ret;
}
static GstFlowReturn
gst_geometric_transform_transform_frame (GstVideoFilter * vfilter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstGeometricTransform *gt;
GstGeometricTransformClass *klass;
gint x, y;
GstFlowReturn ret = GST_FLOW_OK;
gdouble *ptr;
guint8 *in_data;
guint8 *out_data;
gt = GST_GEOMETRIC_TRANSFORM_CAST (vfilter);
klass = GST_GEOMETRIC_TRANSFORM_GET_CLASS (gt);
in_data = GST_VIDEO_FRAME_PLANE_DATA (in_frame, 0);
out_data = GST_VIDEO_FRAME_PLANE_DATA (out_frame, 0);
if (GST_VIDEO_FRAME_FORMAT (out_frame) == GST_VIDEO_FORMAT_AYUV) {
/* in AYUV black is not just all zeros:
* 0x10 is black for Y,
* 0x80 is black for Cr and Cb */
for (int i = 0; i < out_frame->map[0].size; i += 4)
GST_WRITE_UINT32_BE (out_data + i, 0xff108080);
} else {
memset (out_data, 0, out_frame->map[0].size);
}
GST_OBJECT_LOCK (gt);
if (gt->precalc_map) {
if (gt->needs_remap) {
if (klass->prepare_func)
if (!klass->prepare_func (gt)) {
ret = FALSE;
goto end;
}
gst_geometric_transform_generate_map (gt);
}
g_return_val_if_fail (gt->map, GST_FLOW_ERROR);
ptr = gt->map;
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
/* do the mapping */
gst_geometric_transform_do_map (gt, in_data, out_data, x, y, ptr[0],
ptr[1]);
ptr += 2;
}
}
} else {
for (y = 0; y < gt->height; y++) {
for (x = 0; x < gt->width; x++) {
gdouble in_x, in_y;
if (klass->map_func (gt, x, y, &in_x, &in_y)) {
gst_geometric_transform_do_map (gt, in_data, out_data, x, y, in_x,
in_y);
} else {
GST_WARNING_OBJECT (gt, "Failed to do mapping for %d %d", x, y);
ret = GST_FLOW_ERROR;
goto end;
}
}
}
}
end:
GST_OBJECT_UNLOCK (gt);
return ret;
}