frame_interface* synthetic_source::allocate_composite_frame(std::vector<frame_holder> holders)
{
frame_additional_data d {};
auto req_size = 0;
for (auto&& f : holders)
req_size += get_embeded_frames_size(f.frame);
auto res = _actual_source.alloc_frame(RS2_EXTENSION_COMPOSITE_FRAME, req_size * sizeof(rs2_frame*), d, true);
if (!res) return nullptr;
auto cf = static_cast<composite_frame*>(res);
auto frames = cf->get_frames();
for (auto&& f : holders)
copy_frames(std::move(f), frames);
frames -= req_size;
auto releaser = [frames, req_size]()
{
for (auto i = 0; i < req_size; i++)
{
frames[i]->release();
frames[i] = nullptr;
}
};
frame_continuation release_frames(releaser, nullptr);
cf->attach_continuation(std::move(release_frames));
cf->set_stream(cf->first()->get_stream());
return res;
}
/*
* Function: frame_enqueue()
*
* Description:
* Enqueue a frame into the frame cache queue.
*
* Input:
* paddr - The physical address of the frame to enqueue
*/
static inline void
frame_enqueue(uintptr_t paddr) {
/* If our cache is full, release some frames */
if (frame_cache_full()) {
release_frames();
}
frame_cache[frame_cache_ed] = paddr;
frame_cache_ed = (frame_cache_ed + 1) % FRAME_CACHE_SIZE;
}