static gboolean
mark_meta_pooled (GstBuffer * buffer, GstMeta ** meta, gpointer user_data)
{
GST_DEBUG_OBJECT (GST_BUFFER_POOL (user_data),
"marking meta %p as POOLED in buffer %p", *meta, buffer);
GST_META_FLAG_SET (*meta, GST_META_FLAG_POOLED);
GST_META_FLAG_SET (*meta, GST_META_FLAG_LOCKED);
return TRUE;
}
/* ...buffer allocation from frontal camera (object detection engine) */
static int objdet_input_alloc(void *data, GstBuffer *buffer)
{
app_data_t *app = data;
vsink_meta_t *vmeta = gst_buffer_get_vsink_meta(buffer);
int w = vmeta->width, h = vmeta->height;
objdet_meta_t *ometa;
if (app->f_width)
{
/* ...verify buffer dimensions are valid */
CHK_ERR(w == app->f_width && h == app->f_height, -EINVAL);
}
else
{
int W = window_get_width(app->window);
int H = window_get_height(app->window);
/* ...check dimensions are valid */
CHK_ERR(w && h, -EINVAL);
/* ...set buffer dimensions */
app->f_width = w, app->f_height = h;
/* ...initialize object detection engine */
CHK_ERR(app->od = objdet_engine_init(&objdet_callback, app, w, h, __pixfmt_yuv_bpp(vmeta->format), app->od_cfg), -errno);
/* ...create a viewport for data visualization */
texture_scale_to_window(&app->view, app->window, w, h, &app->matrix);
//texture_set_view_scale(&app->view, 0, 0, W, H, W, H, w, h);
/* ...create transformation matrix */
if (0)
{
cairo_matrix_t *m = &app->matrix;
m->xx = (double) W / w, m->xy = 0, m->x0 = 0;
m->yx = 0, m->yy = (double) H / h, m->y0 = 0;
}
}
/* ...allocate texture to wrap the buffer */
CHK_ERR(vmeta->priv = texture_create(w, h, vmeta->plane, vmeta->format), -errno);
/* ...add custom buffer metadata */
CHK_ERR(ometa = gst_buffer_add_objdet_meta(buffer), -(errno = ENOMEM));
CHK_ERR(ometa->buf = texture_map(vmeta->priv, CL_MEM_READ_ONLY), -errno);
GST_META_FLAG_SET(ometa, GST_META_FLAG_POOLED);
/* ...add custom destructor to the buffer */
gst_mini_object_weak_ref(GST_MINI_OBJECT(buffer), __destroy_od_texture, app);
TRACE(INFO, _b("front-camera input buffer %p allocated (%p)"), buffer, ometa->buf);
return 0;
}
