ENUM VB2_BUFFER_STATE(9)

✨ enum vb2_buffer_state(9) ✨

okay so bestie, welcome to the enum vb2_buffer_state(9) page from the Kernel API Manual 🫶 This enum is literally about the current video buffer state — that’s the vibe, no cap 💅

🌸 NAME 🌸

enum vb2_buffer_state — current video buffer state. iconic enum behavior 💖

🎀 SYNOPSIS 🎀

okay so here’s the enum in all its main-character glory ✨ copy it exactly, bestie:

enum vb2_buffer_state {
    VB2_BUF_STATE_DEQUEUED ,
    VB2_BUF_STATE_IN_REQUEST ,
    VB2_BUF_STATE_PREPARING ,
    VB2_BUF_STATE_QUEUED ,
    VB2_BUF_STATE_ACTIVE ,
    VB2_BUF_STATE_DONE ,
    VB2_BUF_STATE_ERROR

};

💅 Constants 💅

• VB2_BUF_STATE_DEQUEUED — buffer under userspace control. yes bestie, userspace has the aux 🎮
• VB2_BUF_STATE_IN_REQUEST — buffer is queued in media request. it’s in the request era 💅
• VB2_BUF_STATE_PREPARING — buffer is being prepared in videobuf2. backstage getting-ready energy 🎀
• VB2_BUF_STATE_QUEUED — buffer queued in videobuf2, but not in driver. so close, yet so far 😭
• VB2_BUF_STATE_ACTIVE — buffer queued in driver and possibly used in a hardware operation. hardware might be using it, highkey active 🔥
• VB2_BUF_STATE_DONE — buffer returned from driver to videobuf2, but not yet dequeued to userspace. it came back but hasn’t been handed over yet 🫶
• VB2_BUF_STATE_ERROR — same as above, but the operation on the buffer has ended with an error, which will be reported to the userspace when it is dequeued. oop 😭 error era, and userspace finds out on dequeue 💀

🔎 SEE ALSO 🔎

okay bestie, the whole videobuf2 friend group is here, and yes you need all of them 💅 Kernel file ./include/media/videobuf2-core.h is the spot:

• enum vb2_memory(9)
• struct vb2_mem_ops(9)
• struct vb2_plane(9)
• enum vb2_io_modes(9)
• struct vb2_buffer(9)
• struct vb2_ops(9)
• struct vb2_buf_ops(9)
• struct vb2_queue(9)
• vb2_queue_allows_cache_hints(9)
• vb2_plane_vaddr(9)
• vb2_plane_cookie(9)
• vb2_buffer_done(9)
• vb2_discard_done(9)
• vb2_wait_for_all_buffers(9)
• vb2_core_querybuf(9)
• vb2_core_reqbufs(9)
• vb2_core_create_bufs(9)
• vb2_core_prepare_buf(9)
• vb2_core_remove_bufs(9)
• vb2_core_qbuf(9)
• vb2_core_dqbuf(9)
• vb2_core_streamon(9)
• vb2_core_streamoff(9)
• vb2_core_expbuf(9)
• vb2_core_queue_init(9)
• vb2_core_queue_release(9)
• vb2_queue_error(9)
• vb2_mmap(9)
• vb2_get_unmapped_area(9)
• vb2_core_poll(9)
• vb2_read(9)
• vb2_write(9)
• vb2_thread_fnc(9)
• vb2_thread_start(9)
• vb2_thread_stop(9)
• vb2_is_streaming(9)
• vb2_fileio_is_active(9)
• vb2_get_num_buffers(9)
• vb2_is_busy(9)
• vb2_get_drv_priv(9)
• vb2_set_plane_payload(9)
• vb2_get_plane_payload(9)
• vb2_plane_size(9)
• vb2_start_streaming_called(9)
• vb2_clear_last_buffer_dequeued(9)
• vb2_get_buffer(9)
• vb2_buffer_in_use(9)
• vb2_verify_memory_type(9)
• vb2_request_object_is_buffer(9)
• vb2_request_buffer_cnt(9)

okay bye bestie 💖 that’s the whole page — source: ./include/media, date: October 2026, from the Kernel API Manual. stay hydrated and may your buffers never error 😭💅