add_new_image    1410 libheif/heif_context.cc         heif_item_id image_id = m_heif_file->add_new_image("hvc1");
add_new_image    1478 libheif/heif_context.cc     heif_item_id alpha_image_id = m_heif_context->m_heif_file->add_new_image("hvc1");
add_new_image     101 libheif/heif_file.h     heif_item_id add_new_image(const char* item_type);