Lines Matching full:output
41 7. Given an ``OUTPUT`` buffer A, then A' represents a buffer on the ``CAPTURE``
84 ``OUTPUT`` buffers must be queued by the client in decode order; for
91 the order in which frames must be displayed; for encoders, ``OUTPUT``
116 OUTPUT
121 from ``OUTPUT`` buffers.
136 data fed to the decoder or encoder; see ``OUTPUT``.
195 Decoding -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
200 ResChange -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
205 Drain -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
207 Seek -> Decoding [ label = "VIDIOC_STREAMON(OUTPUT)" ];
208 Seek -> Initialization [ label = "VIDIOC_REQBUFS(OUTPUT, 0)" ];
211 Stopped -> Seek [ label = "VIDIOC_STREAMOFF(OUTPUT)" ];
218 client may call :c:func:`VIDIOC_ENUM_FMT` on ``OUTPUT``.
230 * Only the formats supported for the format currently active on ``OUTPUT``
234 the client must first set that coded format on ``OUTPUT`` and then
248 ``OUTPUT``.
251 ``OUTPUT``, if applicable, may be queried using their respective controls
257 1. Set the coded format on ``OUTPUT`` via :c:func:`VIDIOC_S_FMT`.
262 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
274 desired size of ``OUTPUT`` buffers; the decoder may adjust it to
283 adjusted size of ``OUTPUT`` buffers.
296 Changing the ``OUTPUT`` format may change the currently set ``CAPTURE``
301 ``OUTPUT``.
309 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
325 Alternatively, :c:func:`VIDIOC_CREATE_BUFS` on the ``OUTPUT`` queue can be
334 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
353 3. Start streaming on the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`.
357 ``OUTPUT`` queue via :c:func:`VIDIOC_QBUF` and :c:func:`VIDIOC_DQBUF`. The
387 its own may attempt to set the width and height of the ``OUTPUT`` format
463 the rectangle within the coded resolution to be output to
499 established coded format, as per the ``OUTPUT`` format and/or stream
600 The ``OUTPUT`` queue must remain streaming. Calling
688 * set width and height of the ``OUTPUT`` format to desired coded resolution to
708 The content of the source ``OUTPUT`` buffers depends on the active coded pixel
715 coded frames to the ``OUTPUT`` queue, due to properties of the selected coded
719 and ``OUTPUT`` buffers and any specific timing of buffers becoming
722 * a buffer queued to ``OUTPUT`` may result in no buffers being produced
726 * a buffer queued to ``OUTPUT`` may result in more than one buffer produced
731 * a buffer queued to ``OUTPUT`` may result in a buffer being produced on
733 ``OUTPUT`` buffers, or be returned out of order, e.g. if display
737 buffers queued to ``OUTPUT`` (e.g. during drain or ``EOS``), because of the
738 ``OUTPUT`` buffers queued in the past whose decoding results are only
743 To allow matching decoded ``CAPTURE`` buffers with ``OUTPUT`` buffers they
745 :c:type:`v4l2_buffer` struct when queuing an ``OUTPUT`` buffer. The
746 ``CAPTURE`` buffer(s), which resulted from decoding that ``OUTPUT`` buffer
749 In addition to the straightforward case of one ``OUTPUT`` buffer producing
752 * one ``OUTPUT`` buffer generates multiple ``CAPTURE`` buffers: the same
753 ``OUTPUT`` timestamp will be copied to multiple ``CAPTURE`` buffers.
755 * multiple ``OUTPUT`` buffers generate one ``CAPTURE`` buffer: timestamp of
756 the ``OUTPUT`` buffer queued first will be copied.
759 buffers are out-of-order compared to the ``OUTPUT`` buffers): ``CAPTURE``
760 timestamps will not retain the order of ``OUTPUT`` timestamps.
781 ``CAPTURE`` buffers that originated from all the ``OUTPUT`` buffers processed
802 * if the decoder is able to precisely report the OUTPUT buffer that triggered
815 Seek is controlled by the ``OUTPUT`` queue, as it is the source of coded data.
819 1. Stop the ``OUTPUT`` queue to begin the seek sequence via
825 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
827 * The decoder will drop all the pending ``OUTPUT`` buffers and they must be
830 2. Restart the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`.
835 a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``.
840 3. Start queuing buffers containing coded data after the seek to the ``OUTPUT``
846 from a resume point (e.g. SPS or a keyframe). Any queued ``OUTPUT``
864 decode output.
884 containing decoded data from the ``OUTPUT`` buffers queued after the seek,
885 as it operates independently from the ``OUTPUT`` queue.
888 decoded frames originating from the ``OUTPUT`` buffers queued before the
892 ``OUTPUT`` buffers, which means that not all of the ``OUTPUT`` buffers
895 ``OUTPUT`` queue:
904 seek, the client may observe the timestamps to match the CAPTURE and OUTPUT
929 * coded resolution (``OUTPUT`` width and height),
985 During the resolution change sequence, the ``OUTPUT`` queue must remain
986 streaming. Calling :c:func:`VIDIOC_STREAMOFF` on the ``OUTPUT`` queue would
989 In principle, the ``OUTPUT`` queue operates separately from the ``CAPTURE``
994 buffers to/from the ``OUTPUT`` queue even while processing this sequence.
999 To ensure that all queued ``OUTPUT`` buffers have been processed and related
1002 received all decoded frames for all ``OUTPUT`` buffers queued before the
1020 The sequence can be only initiated if both ``OUTPUT`` and ``CAPTURE``
1026 2. Any ``OUTPUT`` buffers queued by the client before the
1050 * dequeuing processed ``OUTPUT`` buffers, until all the buffers queued
1062 3. Once all the ``OUTPUT`` buffers queued before the ``V4L2_DEC_CMD_STOP`` call
1064 stopped and it will accept, but not process, any newly queued ``OUTPUT``
1076 ``OUTPUT`` queue - any pending source buffers will be returned to the
1083 issuing :c:func:`VIDIOC_STREAMOFF` on any of the ``OUTPUT`` or ``CAPTURE``
1104 1. Setting the format on the ``OUTPUT`` queue may change the set of formats
1110 supported for the current ``OUTPUT`` format.
1113 formats available on the ``OUTPUT`` queue. An attempt to set a ``CAPTURE``
1114 format that is not supported for the currently selected ``OUTPUT`` format
1118 4. Enumerating formats on the ``OUTPUT`` queue always returns the full set of
1121 5. While buffers are allocated on any of the ``OUTPUT`` or ``CAPTURE`` queues,
1122 the client must not change the format on the ``OUTPUT`` queue. Drivers will
1126 ``OUTPUT`` queue and the ``OUTPUT`` queue is the master that governs the