diff options
Diffstat (limited to 'Documentation/media')
28 files changed, 1829 insertions, 48 deletions
diff --git a/Documentation/media/cec.h.rst.exceptions b/Documentation/media/cec.h.rst.exceptions index 014816d04b9e..d83790ccac8e 100644 --- a/Documentation/media/cec.h.rst.exceptions +++ b/Documentation/media/cec.h.rst.exceptions @@ -335,6 +335,95 @@ ignore define CEC_OP_MENU_STATE_DEACTIVATED ignore define CEC_MSG_USER_CONTROL_PRESSED +ignore define CEC_OP_UI_CMD_SELECT +ignore define CEC_OP_UI_CMD_UP +ignore define CEC_OP_UI_CMD_DOWN +ignore define CEC_OP_UI_CMD_LEFT +ignore define CEC_OP_UI_CMD_RIGHT +ignore define CEC_OP_UI_CMD_RIGHT_UP +ignore define CEC_OP_UI_CMD_RIGHT_DOWN +ignore define CEC_OP_UI_CMD_LEFT_UP +ignore define CEC_OP_UI_CMD_LEFT_DOWN +ignore define CEC_OP_UI_CMD_DEVICE_ROOT_MENU +ignore define CEC_OP_UI_CMD_DEVICE_SETUP_MENU +ignore define CEC_OP_UI_CMD_CONTENTS_MENU +ignore define CEC_OP_UI_CMD_FAVORITE_MENU +ignore define CEC_OP_UI_CMD_BACK +ignore define CEC_OP_UI_CMD_MEDIA_TOP_MENU +ignore define CEC_OP_UI_CMD_MEDIA_CONTEXT_SENSITIVE_MENU +ignore define CEC_OP_UI_CMD_NUMBER_ENTRY_MODE +ignore define CEC_OP_UI_CMD_NUMBER_11 +ignore define CEC_OP_UI_CMD_NUMBER_12 +ignore define CEC_OP_UI_CMD_NUMBER_0_OR_NUMBER_10 +ignore define CEC_OP_UI_CMD_NUMBER_1 +ignore define CEC_OP_UI_CMD_NUMBER_2 +ignore define CEC_OP_UI_CMD_NUMBER_3 +ignore define CEC_OP_UI_CMD_NUMBER_4 +ignore define CEC_OP_UI_CMD_NUMBER_5 +ignore define CEC_OP_UI_CMD_NUMBER_6 +ignore define CEC_OP_UI_CMD_NUMBER_7 +ignore define CEC_OP_UI_CMD_NUMBER_8 +ignore define CEC_OP_UI_CMD_NUMBER_9 +ignore define CEC_OP_UI_CMD_DOT +ignore define CEC_OP_UI_CMD_ENTER +ignore define CEC_OP_UI_CMD_CLEAR +ignore define CEC_OP_UI_CMD_NEXT_FAVORITE +ignore define CEC_OP_UI_CMD_CHANNEL_UP +ignore define CEC_OP_UI_CMD_CHANNEL_DOWN +ignore define CEC_OP_UI_CMD_PREVIOUS_CHANNEL +ignore define CEC_OP_UI_CMD_SOUND_SELECT +ignore define CEC_OP_UI_CMD_INPUT_SELECT +ignore define CEC_OP_UI_CMD_DISPLAY_INFORMATION +ignore define CEC_OP_UI_CMD_HELP +ignore define CEC_OP_UI_CMD_PAGE_UP +ignore define CEC_OP_UI_CMD_PAGE_DOWN +ignore define CEC_OP_UI_CMD_POWER +ignore define CEC_OP_UI_CMD_VOLUME_UP +ignore define CEC_OP_UI_CMD_VOLUME_DOWN +ignore define CEC_OP_UI_CMD_MUTE +ignore define CEC_OP_UI_CMD_PLAY +ignore define CEC_OP_UI_CMD_STOP +ignore define CEC_OP_UI_CMD_PAUSE +ignore define CEC_OP_UI_CMD_RECORD +ignore define CEC_OP_UI_CMD_REWIND +ignore define CEC_OP_UI_CMD_FAST_FORWARD +ignore define CEC_OP_UI_CMD_EJECT +ignore define CEC_OP_UI_CMD_SKIP_FORWARD +ignore define CEC_OP_UI_CMD_SKIP_BACKWARD +ignore define CEC_OP_UI_CMD_STOP_RECORD +ignore define CEC_OP_UI_CMD_PAUSE_RECORD +ignore define CEC_OP_UI_CMD_ANGLE +ignore define CEC_OP_UI_CMD_SUB_PICTURE +ignore define CEC_OP_UI_CMD_VIDEO_ON_DEMAND +ignore define CEC_OP_UI_CMD_ELECTRONIC_PROGRAM_GUIDE +ignore define CEC_OP_UI_CMD_TIMER_PROGRAMMING +ignore define CEC_OP_UI_CMD_INITIAL_CONFIGURATION +ignore define CEC_OP_UI_CMD_SELECT_BROADCAST_TYPE +ignore define CEC_OP_UI_CMD_SELECT_SOUND_PRESENTATION +ignore define CEC_OP_UI_CMD_AUDIO_DESCRIPTION +ignore define CEC_OP_UI_CMD_INTERNET +ignore define CEC_OP_UI_CMD_3D_MODE +ignore define CEC_OP_UI_CMD_PLAY_FUNCTION +ignore define CEC_OP_UI_CMD_PAUSE_PLAY_FUNCTION +ignore define CEC_OP_UI_CMD_RECORD_FUNCTION +ignore define CEC_OP_UI_CMD_PAUSE_RECORD_FUNCTION +ignore define CEC_OP_UI_CMD_STOP_FUNCTION +ignore define CEC_OP_UI_CMD_MUTE_FUNCTION +ignore define CEC_OP_UI_CMD_RESTORE_VOLUME_FUNCTION +ignore define CEC_OP_UI_CMD_TUNE_FUNCTION +ignore define CEC_OP_UI_CMD_SELECT_MEDIA_FUNCTION +ignore define CEC_OP_UI_CMD_SELECT_AV_INPUT_FUNCTION +ignore define CEC_OP_UI_CMD_SELECT_AUDIO_INPUT_FUNCTION +ignore define CEC_OP_UI_CMD_POWER_TOGGLE_FUNCTION +ignore define CEC_OP_UI_CMD_POWER_OFF_FUNCTION +ignore define CEC_OP_UI_CMD_POWER_ON_FUNCTION +ignore define CEC_OP_UI_CMD_F1_BLUE +ignore define CEC_OP_UI_CMD_F2_RED +ignore define CEC_OP_UI_CMD_F3_GREEN +ignore define CEC_OP_UI_CMD_F4_YELLOW +ignore define CEC_OP_UI_CMD_F5 +ignore define CEC_OP_UI_CMD_DATA + ignore define CEC_OP_UI_BCAST_TYPE_TOGGLE_ALL ignore define CEC_OP_UI_BCAST_TYPE_TOGGLE_DIG_ANA ignore define CEC_OP_UI_BCAST_TYPE_ANALOGUE diff --git a/Documentation/media/kapi/v4l2-controls.rst b/Documentation/media/kapi/v4l2-controls.rst index ebe2a55908be..b20800cae3f2 100644 --- a/Documentation/media/kapi/v4l2-controls.rst +++ b/Documentation/media/kapi/v4l2-controls.rst @@ -140,6 +140,15 @@ Menu controls with a driver specific menu are added by calling const struct v4l2_ctrl_ops *ops, u32 id, s32 max, s32 skip_mask, s32 def, const char * const *qmenu); +Standard compound controls can be added by calling +:c:func:`v4l2_ctrl_new_std_compound`: + +.. code-block:: c + + struct v4l2_ctrl *v4l2_ctrl_new_std_compound(struct v4l2_ctrl_handler *hdl, + const struct v4l2_ctrl_ops *ops, u32 id, + const union v4l2_ctrl_ptr p_def); + Integer menu controls with a driver specific menu can be added by calling :c:func:`v4l2_ctrl_new_int_menu`: diff --git a/Documentation/media/uapi/cec/cec-funcs.rst b/Documentation/media/uapi/cec/cec-funcs.rst index 620590b168c9..dc6da9c639a8 100644 --- a/Documentation/media/uapi/cec/cec-funcs.rst +++ b/Documentation/media/uapi/cec/cec-funcs.rst @@ -24,6 +24,7 @@ Function Reference cec-ioc-adap-g-caps cec-ioc-adap-g-log-addrs cec-ioc-adap-g-phys-addr + cec-ioc-adap-g-conn-info cec-ioc-dqevent cec-ioc-g-mode cec-ioc-receive diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst index 0c44f31a9b59..76761a98c312 100644 --- a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst +++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst @@ -135,8 +135,12 @@ returns the information to the application. The ioctl never fails. - The CEC hardware can monitor CEC pin changes from low to high voltage and vice versa. When in pin monitoring mode the application will receive ``CEC_EVENT_PIN_CEC_LOW`` and ``CEC_EVENT_PIN_CEC_HIGH`` events. + * .. _`CEC-CAP-CONNECTOR-INFO`: - + - ``CEC_CAP_CONNECTOR_INFO`` + - 0x00000100 + - If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can + be used. Return Value ============ diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst new file mode 100644 index 000000000000..a21659d55c6b --- /dev/null +++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst @@ -0,0 +1,105 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. +.. Copyright 2019 Google LLC +.. +.. _CEC_ADAP_G_CONNECTOR_INFO: + +******************************* +ioctl CEC_ADAP_G_CONNECTOR_INFO +******************************* + +Name +==== + +CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information + +Synopsis +======== + +.. c:function:: int ioctl( int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp ) + :name: CEC_ADAP_G_CONNECTOR_INFO + +Arguments +========= + +``fd`` + File descriptor returned by :c:func:`open() <cec-open>`. + +``argp`` + + +Description +=========== + +Using this ioctl an application can learn which HDMI connector this CEC +device corresponds to. While calling this ioctl the application should +provide a pointer to a cec_connector_info struct which will be populated +by the kernel with the info provided by the adapter's driver. This ioctl +is only available if the ``CEC_CAP_CONNECTOR_INFO`` capability is set. + +.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}| + +.. c:type:: cec_connector_info + +.. flat-table:: struct cec_connector_info + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 1 8 + + * - __u32 + - ``type`` + - The type of connector this adapter is associated with. + * - union + - ``(anonymous)`` + - + * - + - ``struct cec_drm_connector_info`` + - drm + - :ref:`cec-drm-connector-info` + + +.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}| + +.. _connector-type: + +.. flat-table:: Connector types + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 8 + + * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`: + + - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR`` + - 0 + - No connector is associated with the adapter/the information is not + provided by the driver. + * .. _`CEC-CONNECTOR-TYPE-DRM`: + + - ``CEC_CONNECTOR_TYPE_DRM`` + - 1 + - Indicates that a DRM connector is associated with this adapter. + Information about the connector can be found in + :ref:`cec-drm-connector-info`. + +.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}| + +.. c:type:: cec_drm_connector_info + +.. _cec-drm-connector-info: + +.. flat-table:: struct cec_drm_connector_info + :header-rows: 0 + :stub-columns: 0 + :widths: 3 1 8 + + * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`: + + - __u32 + - ``card_no`` + - DRM card number: the number from a card's path, e.g. 0 in case of + /dev/card0. + * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`: + + - __u32 + - ``connector_id`` + - DRM connector ID. diff --git a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst index 46a1c99a595e..5e21b1fbfc01 100644 --- a/Documentation/media/uapi/cec/cec-ioc-dqevent.rst +++ b/Documentation/media/uapi/cec/cec-ioc-dqevent.rst @@ -70,6 +70,14 @@ it is guaranteed that the state did change in between the two events. addresses are claimed or if ``phys_addr`` is ``CEC_PHYS_ADDR_INVALID``. If bit 15 is set (``1 << CEC_LOG_ADDR_UNREGISTERED``) then this device has the unregistered logical address. In that case all other bits are 0. + * - __u16 + - ``have_conn_info`` + - If non-zero, then HDMI connector information is available. + This field is only valid if ``CEC_CAP_CONNECTOR_INFO`` is set. If that + capability is set and ``have_conn_info`` is zero, then that indicates + that the HDMI connector device is not instantiated, either because + the HDMI driver is still configuring the device or because the HDMI + device was unbound. .. c:type:: cec_event_lost_msgs diff --git a/Documentation/media/uapi/mediactl/request-api.rst b/Documentation/media/uapi/mediactl/request-api.rst index a74c82d95609..01abe8103bdd 100644 --- a/Documentation/media/uapi/mediactl/request-api.rst +++ b/Documentation/media/uapi/mediactl/request-api.rst @@ -53,8 +53,8 @@ with different configurations in advance, knowing that the configuration will be applied when needed to get the expected result. Configuration values at the time of request completion are also available for reading. -Usage -===== +General Usage +------------- The Request API extends the Media Controller API and cooperates with subsystem-specific APIs to support request usage. At the Media Controller diff --git a/Documentation/media/uapi/v4l/biblio.rst b/Documentation/media/uapi/v4l/biblio.rst index ad2ff258afa8..8095f57d3d75 100644 --- a/Documentation/media/uapi/v4l/biblio.rst +++ b/Documentation/media/uapi/v4l/biblio.rst @@ -131,6 +131,15 @@ ITU-T Rec. H.264 Specification (04/2017 Edition) :author: International Telecommunication Union (http://www.itu.ch) +.. _hevc: + +ITU H.265/HEVC +============== + +:title: ITU-T Rec. H.265 | ISO/IEC 23008-2 "High Efficiency Video Coding" + +:author: International Telecommunication Union (http://www.itu.ch), International Organisation for Standardisation (http://www.iso.ch) + .. _jfif: JFIF diff --git a/Documentation/media/uapi/v4l/buffer.rst b/Documentation/media/uapi/v4l/buffer.rst index 1cbd9cde57f3..9149b57728e5 100644 --- a/Documentation/media/uapi/v4l/buffer.rst +++ b/Documentation/media/uapi/v4l/buffer.rst @@ -607,6 +607,19 @@ Buffer Flags applications shall use this flag for output buffers if the data in this buffer has not been created by the CPU but by some DMA-capable unit, in which case caches have not been used. + * .. _`V4L2-BUF-FLAG-M2M-HOLD-CAPTURE-BUF`: + + - ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` + - 0x00000200 + - Only valid if ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` is + set. It is typically used with stateless decoders where multiple + output buffers each decode to a slice of the decoded frame. + Applications can set this flag when queueing the output buffer + to prevent the driver from dequeueing the capture buffer after + the output buffer has been decoded (i.e. the capture buffer is + 'held'). If the timestamp of this output buffer differs from that + of the previous output buffer, then that indicates the start of a + new frame and the previously held capture buffer is dequeued. * .. _`V4L2-BUF-FLAG-LAST`: - ``V4L2_BUF_FLAG_LAST`` diff --git a/Documentation/media/uapi/v4l/dev-mem2mem.rst b/Documentation/media/uapi/v4l/dev-mem2mem.rst index caa05f5f6380..70953958cee6 100644 --- a/Documentation/media/uapi/v4l/dev-mem2mem.rst +++ b/Documentation/media/uapi/v4l/dev-mem2mem.rst @@ -46,3 +46,4 @@ devices are given in the following sections. :maxdepth: 1 dev-decoder + dev-stateless-decoder diff --git a/Documentation/media/uapi/v4l/dev-stateless-decoder.rst b/Documentation/media/uapi/v4l/dev-stateless-decoder.rst new file mode 100644 index 000000000000..4a26646eeec5 --- /dev/null +++ b/Documentation/media/uapi/v4l/dev-stateless-decoder.rst @@ -0,0 +1,424 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. _stateless_decoder: + +************************************************** +Memory-to-memory Stateless Video Decoder Interface +************************************************** + +A stateless decoder is a decoder that works without retaining any kind of state +between processed frames. This means that each frame is decoded independently +of any previous and future frames, and that the client is responsible for +maintaining the decoding state and providing it to the decoder with each +decoding request. This is in contrast to the stateful video decoder interface, +where the hardware and driver maintain the decoding state and all the client +has to do is to provide the raw encoded stream and dequeue decoded frames in +display order. + +This section describes how user-space ("the client") is expected to communicate +with stateless decoders in order to successfully decode an encoded stream. +Compared to stateful codecs, the decoder/client sequence is simpler, but the +cost of this simplicity is extra complexity in the client which is responsible +for maintaining a consistent decoding state. + +Stateless decoders make use of the :ref:`media-request-api`. A stateless +decoder must expose the ``V4L2_BUF_CAP_SUPPORTS_REQUESTS`` capability on its +``OUTPUT`` queue when :c:func:`VIDIOC_REQBUFS` or :c:func:`VIDIOC_CREATE_BUFS` +are invoked. + +Depending on the encoded formats supported by the decoder, a single decoded +frame may be the result of several decode requests (for instance, H.264 streams +with multiple slices per frame). Decoders that support such formats must also +expose the ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` capability on their +``OUTPUT`` queue. + +Querying capabilities +===================== + +1. To enumerate the set of coded formats supported by the decoder, the client + calls :c:func:`VIDIOC_ENUM_FMT` on the ``OUTPUT`` queue. + + * The driver must always return the full set of supported ``OUTPUT`` formats, + irrespective of the format currently set on the ``CAPTURE`` queue. + + * Simultaneously, the driver must restrain the set of values returned by + codec-specific capability controls (such as H.264 profiles) to the set + actually supported by the hardware. + +2. To enumerate the set of supported raw formats, the client calls + :c:func:`VIDIOC_ENUM_FMT` on the ``CAPTURE`` queue. + + * The driver must return only the formats supported for the format currently + active on the ``OUTPUT`` queue. + + * Depending on the currently set ``OUTPUT`` format, the set of supported raw + formats may depend on the value of some codec-dependent controls. + The client is responsible for making sure that these controls are set + before querying the ``CAPTURE`` queue. Failure to do so will result in the + default values for these controls being used, and a returned set of formats + that may not be usable for the media the client is trying to decode. + +3. The client may use :c:func:`VIDIOC_ENUM_FRAMESIZES` to detect supported + resolutions for a given format, passing desired pixel format in + :c:type:`v4l2_frmsizeenum`'s ``pixel_format``. + +4. Supported profiles and levels for the current ``OUTPUT`` format, if + applicable, may be queried using their respective controls via + :c:func:`VIDIOC_QUERYCTRL`. + +Initialization +============== + +1. Set the coded format on the ``OUTPUT`` queue via :c:func:`VIDIOC_S_FMT`. + + * **Required fields:** + + ``type`` + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. + + ``pixelformat`` + a coded pixel format. + + ``width``, ``height`` + coded width and height parsed from the stream. + + other fields + follow standard semantics. + + .. note:: + + Changing the ``OUTPUT`` format may change the currently set ``CAPTURE`` + format. The driver will derive a new ``CAPTURE`` format from the + ``OUTPUT`` format being set, including resolution, colorimetry + parameters, etc. If the client needs a specific ``CAPTURE`` format, + it must adjust it afterwards. + +2. Call :c:func:`VIDIOC_S_EXT_CTRLS` to set all the controls (parsed headers, + etc.) required by the ``OUTPUT`` format to enumerate the ``CAPTURE`` formats. + +3. Call :c:func:`VIDIOC_G_FMT` for ``CAPTURE`` queue to get the format for the + destination buffers parsed/decoded from the bytestream. + + * **Required fields:** + + ``type`` + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. + + * **Returned fields:** + + ``width``, ``height`` + frame buffer resolution for the decoded frames. + + ``pixelformat`` + pixel format for decoded frames. + + ``num_planes`` (for _MPLANE ``type`` only) + number of planes for pixelformat. + + ``sizeimage``, ``bytesperline`` + as per standard semantics; matching frame buffer format. + + .. note:: + + The value of ``pixelformat`` may be any pixel format supported for the + ``OUTPUT`` format, based on the hardware capabilities. It is suggested + that the driver chooses the preferred/optimal format for the current + configuration. For example, a YUV format may be preferred over an RGB + format, if an additional conversion step would be required for RGB. + +4. *[optional]* Enumerate ``CAPTURE`` formats via :c:func:`VIDIOC_ENUM_FMT` on + the ``CAPTURE`` queue. The client may use this ioctl to discover which + alternative raw formats are supported for the current ``OUTPUT`` format and + select one of them via :c:func:`VIDIOC_S_FMT`. + + .. note:: + + The driver will return only formats supported for the currently selected + ``OUTPUT`` format and currently set controls, even if more formats may be + supported by the decoder in general. + + For example, a decoder may support YUV and RGB formats for + resolutions 1920x1088 and lower, but only YUV for higher resolutions (due + to hardware limitations). After setting a resolution of 1920x1088 or lower + as the ``OUTPUT`` format, :c:func:`VIDIOC_ENUM_FMT` may return a set of + YUV and RGB pixel formats, but after setting a resolution higher than + 1920x1088, the driver will not return RGB pixel formats, since they are + unsupported for this resolution. + +5. *[optional]* Choose a different ``CAPTURE`` format than suggested via + :c:func:`VIDIOC_S_FMT` on ``CAPTURE`` queue. It is possible for the client to + choose a different format than selected/suggested by the driver in + :c:func:`VIDIOC_G_FMT`. + + * **Required fields:** + + ``type`` + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. + + ``pixelformat`` + a raw pixel format. + + ``width``, ``height`` + frame buffer resolution of the decoded stream; typically unchanged from + what was returned with :c:func:`VIDIOC_G_FMT`, but it may be different + if the hardware supports composition and/or scaling. + + After performing this step, the client must perform step 3 again in order + to obtain up-to-date information about the buffers size and layout. + +6. Allocate source (bytestream) buffers via :c:func:`VIDIOC_REQBUFS` on + ``OUTPUT`` queue. + + * **Required fields:** + + ``count`` + requested number of buffers to allocate; greater than zero. + + ``type`` + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``. + + ``memory`` + follows standard semantics. + + * **Return fields:** + + ``count`` + actual number of buffers allocated. + + * If required, the driver will adjust ``count`` to be equal or bigger to the + minimum of required number of ``OUTPUT`` buffers for the given format and + requested count. The client must check this value after the ioctl returns + to get the actual number of buffers allocated. + +7. Allocate destination (raw format) buffers via :c:func:`VIDIOC_REQBUFS` on the + ``CAPTURE`` queue. + + * **Required fields:** + + ``count`` + requested number of buffers to allocate; greater than zero. The client + is responsible for deducing the minimum number of buffers required + for the stream to be properly decoded (taking e.g. reference frames + into account) and pass an equal or bigger number. + + ``type`` + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``CAPTURE``. + + ``memory`` + follows standard semantics. ``V4L2_MEMORY_USERPTR`` is not supported + for ``CAPTURE`` buffers. + + * **Return fields:** + + ``count`` + adjusted to allocated number of buffers, in case the codec requires + more buffers than requested. + + * The driver must adjust count to the minimum of required number of + ``CAPTURE`` buffers for the current format, stream configuration and + requested count. The client must check this value after the ioctl + returns to get the number of buffers allocated. + +8. Allocate requests (likely one per ``OUTPUT`` buffer) via + :c:func:`MEDIA_IOC_REQUEST_ALLOC` on the media device. + +9. Start streaming on both ``OUTPUT`` and ``CAPTURE`` queues via + :c:func:`VIDIOC_STREAMON`. + +Decoding +======== + +For each frame, the client is responsible for submitting at least one request to +which the following is attached: + +* The amount of encoded data expected by the codec for its current + configuration, as a buffer submitted to the ``OUTPUT`` queue. Typically, this + corresponds to one frame worth of encoded data, but some formats may allow (or + require) different amounts per unit. +* All the metadata needed to decode the submitted encoded data, in the form of + controls relevant to the format being decoded. + +The amount of data and contents of the source ``OUTPUT`` buffer, as well as the +controls that must be set on the request, depend on the active coded pixel +format and might be affected by codec-specific extended controls, as stated in +documentation of each format. + +If there is a possibility that the decoded frame will require one or more +decode requests after the current one in order to be produced, then the client +must set the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag on the ``OUTPUT`` +buffer. This will result in the (potentially partially) decoded ``CAPTURE`` +buffer not being made available for dequeueing, and reused for the next decode +request if the timestamp of the next ``OUTPUT`` buffer has not changed. + +A typical frame would thus be decoded using the following sequence: + +1. Queue an ``OUTPUT`` buffer containing one unit of encoded bytestream data for + the decoding request, using :c:func:`VIDIOC_QBUF`. + + * **Required fields:** + + ``index`` + index of the buffer being queued. + + ``type`` + type of the buffer. + + ``bytesused`` + number of bytes taken by the encoded data frame in the buffer. + + ``flags`` + the ``V4L2_BUF_FLAG_REQUEST_FD`` flag must be set. Additionally, if + we are not sure that the current decode request is the last one needed + to produce a fully decoded frame, then + ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` must also be set. + + ``request_fd`` + must be set to the file descriptor of the decoding request. + + ``timestamp`` + must be set to a unique value per frame. This value will be propagated + into the decoded frame's buffer and can also be used to use this frame + as the reference of another. If using multiple decode requests per + frame, then the timestamps of all the ``OUTPUT`` buffers for a given + frame must be identical. If the timestamp changes, then the currently + held ``CAPTURE`` buffer will be made available for dequeuing and the + current request will work on a new ``CAPTURE`` buffer. + +2. Set the codec-specific controls for the decoding request, using + :c:func:`VIDIOC_S_EXT_CTRLS`. + + * **Required fields:** + + ``which`` + must be ``V4L2_CTRL_WHICH_REQUEST_VAL``. + + ``request_fd`` + must be set to the file descriptor of the decoding request. + + other fields + other fields are set as usual when setting controls. The ``controls`` + array must contain all the codec-specific controls required to decode + a frame. + + .. note:: + + It is possible to specify the controls in different invocations of + :c:func:`VIDIOC_S_EXT_CTRLS`, or to overwrite a previously set control, as + long as ``request_fd`` and ``which`` are properly set. The controls state + at the moment of request submission is the one that will be considered. + + .. note:: + + The order in which steps 1 and 2 take place is interchangeable. + +3. Submit the request by invoking :c:func:`MEDIA_REQUEST_IOC_QUEUE` on the + request FD. + + If the request is submitted without an ``OUTPUT`` buffer, or if some of the + required controls are missing from the request, then + :c:func:`MEDIA_REQUEST_IOC_QUEUE` will return ``-ENOENT``. If more than one + ``OUTPUT`` buffer is queued, then it will return ``-EINVAL``. + :c:func:`MEDIA_REQUEST_IOC_QUEUE` returning non-zero means that no + ``CAPTURE`` buffer will be produced for this request. + +``CAPTURE`` buffers must not be part of the request, and are queued +independently. They are returned in decode order (i.e. the same order as coded +frames were submitted to the ``OUTPUT`` queue). + +Runtime decoding errors are signaled by the dequeued ``CAPTURE`` buffers +carrying the ``V4L2_BUF_FLAG_ERROR`` flag. If a decoded reference frame has an +error, then all following decoded frames that refer to it also have the +``V4L2_BUF_FLAG_ERROR`` flag set, although the decoder will still try to +produce (likely corrupted) frames. + +Buffer management while decoding +================================ +Contrary to stateful decoders, a stateless decoder does not perform any kind of +buffer management: it only guarantees that dequeued ``CAPTURE`` buffers can be +used by the client for as long as they are not queued again. "Used" here +encompasses using the buffer for compositing or display. + +A dequeued capture buffer can also be used as the reference frame of another +buffer. + +A frame is specified as reference by converting its timestamp into nanoseconds, +and storing it into the relevant member of a codec-dependent control structure. +The :c:func:`v4l2_timeval_to_ns` function must be used to perform that +conversion. The timestamp of a frame can be used to reference it as soon as all +its units of encoded data are successfully submitted to the ``OUTPUT`` queue. + +A decoded buffer containing a reference frame must not be reused as a decoding +target until all the frames referencing it have been decoded. The safest way to +achieve this is to refrain from queueing a reference buffer until all the +decoded frames referencing it have been dequeued. However, if the driver can +guarantee that buffers queued to the ``CAPTURE`` queue are processed in queued +order, then user-space can take advantage of this guarantee and queue a +reference buffer when the following conditions are met: + +1. All the requests for frames affected by the reference frame have been + queued, and + +2. A sufficient number of ``CAPTURE`` buffers to cover all the decoded + referencing frames have been queued. + +When queuing a decoding request, the driver will increase the reference count of +all the resources associated with reference frames. This means that the client +can e.g. close the DMABUF file descriptors of reference frame buffers if it +won't need them afterwards. + +Seeking +======= +In order to seek, the client just needs to submit requests using input buffers +corresponding to the new stream position. It must however be aware that +resolution may have changed and follow the dynamic resolution change sequence in +that case. Also depending on the codec used, picture parameters (e.g. SPS/PPS +for H.264) may have changed and the client is responsible for making sure that a +valid state is sent to the decoder. + +The client is then free to ignore any returned ``CAPTURE`` buffer that comes +from the pre-seek position. + +Pausing +======= + +In order to pause, the client can just cease queuing buffers onto the ``OUTPUT`` +queue. Without source bytestream data, there is no data to process and the codec +will remain idle. + +Dynamic resolution change +========================= + +If the client detects a resolution change in the stream, it will need to perform +the initialization sequence again with the new resolution: + +1. If the last submitted request resulted in a ``CAPTURE`` buffer being + held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the + last frame is not available on the ``CAPTURE`` queue. In this case, a + ``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver + dequeue the held ``CAPTURE`` buffer. + +2. Wait until all submitted requests have completed and dequeue the + corresponding output buffers. + +3. Call :c:func:`VIDIOC_STREAMOFF` on both the ``OUTPUT`` and ``CAPTURE`` + queues. + +4. Free all ``CAPTURE`` buffers by calling :c:func:`VIDIOC_REQBUFS` on the + ``CAPTURE`` queue with a buffer count of zero. + +5. Perform the initialization sequence again (minus the allocation of + ``OUTPUT`` buffers), with the new resolution set on the ``OUTPUT`` queue. + Note that due to resolution constraints, a different format may need to be + picked on the ``CAPTURE`` queue. + +Drain +===== + +If the last submitted request resulted in a ``CAPTURE`` buffer being +held by the use of the ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag, then the +last frame is not available on the ``CAPTURE`` queue. In this case, a +``V4L2_DEC_CMD_FLUSH`` command shall be sent. This will make the driver +dequeue the held ``CAPTURE`` buffer. + +After that, in order to drain the stream on a stateless decoder, the client +just needs to wait until all the submitted requests are completed. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst index bc5dd8e76567..28313c0f4e7c 100644 --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst @@ -1713,10 +1713,14 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - * - __u8 - ``scaling_list_4x4[6][16]`` - - + - Scaling matrix after applying the inverse scanning process. + Expected list order is Intra Y, Intra Cb, Intra Cr, Inter Y, + Inter Cb, Inter Cr. * - __u8 - ``scaling_list_8x8[6][64]`` - - + - Scaling matrix after applying the inverse scanning process. + Expected list order is Intra Y, Inter Y, Intra Cb, Inter Cb, + Intra Cr, Inter Cr. ``V4L2_CID_MPEG_VIDEO_H264_SLICE_PARAMS (struct)`` Specifies the slice parameters (as extracted from the bitstream) @@ -1796,7 +1800,7 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - - * - __u32 - ``dec_ref_pic_marking_bit_size`` - - + - Size in bits of the dec_ref_pic_marking() syntax element. * - __u32 - ``pic_order_cnt_bit_size`` - @@ -1820,10 +1824,12 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - - * - __u8 - ``num_ref_idx_l0_active_minus1`` - - + - If num_ref_idx_active_override_flag is not set, this field must be + set to the value of num_ref_idx_l0_default_active_minus1. * - __u8 - ``num_ref_idx_l1_active_minus1`` - - + - If num_ref_idx_active_override_flag is not set, this field must be + set to the value of num_ref_idx_l1_default_active_minus1. * - __u32 - ``slice_group_change_cycle`` - @@ -1983,9 +1989,9 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type - - ``reference_ts`` - Timestamp of the V4L2 capture buffer to use as reference, used with B-coded and P-coded frames. The timestamp refers to the - ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the - :c:func:`v4l2_timeval_to_ns()` function to convert the struct - :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. + ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the + :c:func:`v4l2_timeval_to_ns()` function to convert the struct + :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. * - __u16 - ``frame_num`` - @@ -3693,3 +3699,550 @@ enum v4l2_mpeg_video_hevc_size_of_length_field - Indicates whether to generate SPS and PPS at every IDR. Setting it to 0 disables generating SPS and PPS at every IDR. Setting it to one enables generating SPS and PPS at every IDR. + +.. _v4l2-mpeg-hevc: + +``V4L2_CID_MPEG_VIDEO_HEVC_SPS (struct)`` + Specifies the Sequence Parameter Set fields (as extracted from the + bitstream) for the associated HEVC slice data. + These bitstream parameters are defined according to :ref:`hevc`. + They are described in section 7.4.3.2 "Sequence parameter set RBSP + semantics" of the specification. + +.. c:type:: v4l2_ctrl_hevc_sps + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_ctrl_hevc_sps + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u16 + - ``pic_width_in_luma_samples`` + - + * - __u16 + - ``pic_height_in_luma_samples`` + - + * - __u8 + - ``bit_depth_luma_minus8`` + - + * - __u8 + - ``bit_depth_chroma_minus8`` + - + * - __u8 + - ``log2_max_pic_order_cnt_lsb_minus4`` + - + * - __u8 + - ``sps_max_dec_pic_buffering_minus1`` + - + * - __u8 + - ``sps_max_num_reorder_pics`` + - + * - __u8 + - ``sps_max_latency_increase_plus1`` + - + * - __u8 + - ``log2_min_luma_coding_block_size_minus3`` + - + * - __u8 + - ``log2_diff_max_min_luma_coding_block_size`` + - + * - __u8 + - ``log2_min_luma_transform_block_size_minus2`` + - + * - __u8 + - ``log2_diff_max_min_luma_transform_block_size`` + - + * - __u8 + - ``max_transform_hierarchy_depth_inter`` + - + * - __u8 + - ``max_transform_hierarchy_depth_intra`` + - + * - __u8 + - ``pcm_sample_bit_depth_luma_minus1`` + - + * - __u8 + - ``pcm_sample_bit_depth_chroma_minus1`` + - + * - __u8 + - ``log2_min_pcm_luma_coding_block_size_minus3`` + - + * - __u8 + - ``log2_diff_max_min_pcm_luma_coding_block_size`` + - + * - __u8 + - ``num_short_term_ref_pic_sets`` + - + * - __u8 + - ``num_long_term_ref_pics_sps`` + - + * - __u8 + - ``chroma_format_idc`` + - + * - __u64 + - ``flags`` + - See :ref:`Sequence Parameter Set Flags <hevc_sps_flags>` + +.. _hevc_sps_flags: + +``Sequence Parameter Set Flags`` + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE`` + - 0x00000001 + - + * - ``V4L2_HEVC_SPS_FLAG_SCALING_LIST_ENABLED`` + - 0x00000002 + - + * - ``V4L2_HEVC_SPS_FLAG_AMP_ENABLED`` + - 0x00000004 + - + * - ``V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET`` + - 0x00000008 + - + * - ``V4L2_HEVC_SPS_FLAG_PCM_ENABLED`` + - 0x00000010 + - + * - ``V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED`` + - 0x00000020 + - + * - ``V4L2_HEVC_SPS_FLAG_LONG_TERM_REF_PICS_PRESENT`` + - 0x00000040 + - + * - ``V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED`` + - 0x00000080 + - + * - ``V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED`` + - 0x00000100 + - + +``V4L2_CID_MPEG_VIDEO_HEVC_PPS (struct)`` + Specifies the Picture Parameter Set fields (as extracted from the + bitstream) for the associated HEVC slice data. + These bitstream parameters are defined according to :ref:`hevc`. + They are described in section 7.4.3.3 "Picture parameter set RBSP + semantics" of the specification. + +.. c:type:: v4l2_ctrl_hevc_pps + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_ctrl_hevc_pps + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u8 + - ``num_extra_slice_header_bits`` + - + * - __s8 + - ``init_qp_minus26`` + - + * - __u8 + - ``diff_cu_qp_delta_depth`` + - + * - __s8 + - ``pps_cb_qp_offset`` + - + * - __s8 + - ``pps_cr_qp_offset`` + - + * - __u8 + - ``num_tile_columns_minus1`` + - + * - __u8 + - ``num_tile_rows_minus1`` + - + * - __u8 + - ``column_width_minus1[20]`` + - + * - __u8 + - ``row_height_minus1[22]`` + - + * - __s8 + - ``pps_beta_offset_div2`` + - + * - __s8 + - ``pps_tc_offset_div2`` + - + * - __u8 + - ``log2_parallel_merge_level_minus2`` + - + * - __u8 + - ``padding[4]`` + - Applications and drivers must set this to zero. + * - __u64 + - ``flags`` + - See :ref:`Picture Parameter Set Flags <hevc_pps_flags>` + +.. _hevc_pps_flags: + +``Picture Parameter Set Flags`` + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT`` + - 0x00000001 + - + * - ``V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT`` + - 0x00000002 + - + * - ``V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED`` + - 0x00000004 + - + * - ``V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT`` + - 0x00000008 + - + * - ``V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED`` + - 0x00000010 + - + * - ``V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED`` + - 0x00000020 + - + * - ``V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED`` + - 0x00000040 + - + * - ``V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT`` + - 0x00000080 + - + * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED`` + - 0x00000100 + - + * - ``V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED`` + - 0x00000200 + - + * - ``V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED`` + - 0x00000400 + - + * - ``V4L2_HEVC_PPS_FLAG_TILES_ENABLED`` + - 0x00000800 + - + * - ``V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED`` + - 0x00001000 + - + * - ``V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED`` + - 0x00002000 + - + * - ``V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED`` + - 0x00004000 + - + * - ``V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED`` + - 0x00008000 + - + * - ``V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER`` + - 0x00010000 + - + * - ``V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT`` + - 0x00020000 + - + * - ``V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT`` + - 0x00040000 + - + +``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (struct)`` + Specifies various slice-specific parameters, especially from the NAL unit + header, general slice segment header and weighted prediction parameter + parts of the bitstream. + These bitstream parameters are defined according to :ref:`hevc`. + They are described in section 7.4.7 "General slice segment header + semantics" of the specification. + +.. c:type:: v4l2_ctrl_hevc_slice_params + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_ctrl_hevc_slice_params + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u32 + - ``bit_size`` + - Size (in bits) of the current slice data. + * - __u32 + - ``data_bit_offset`` + - Offset (in bits) to the video data in the current slice data. + * - __u8 + - ``nal_unit_type`` + - + * - __u8 + - ``nuh_temporal_id_plus1`` + - + * - __u8 + - ``slice_type`` + - + (V4L2_HEVC_SLICE_TYPE_I, V4L2_HEVC_SLICE_TYPE_P or + V4L2_HEVC_SLICE_TYPE_B). + * - __u8 + - ``colour_plane_id`` + - + * - __u16 + - ``slice_pic_order_cnt`` + - + * - __u8 + - ``num_ref_idx_l0_active_minus1`` + - + * - __u8 + - ``num_ref_idx_l1_active_minus1`` + - + * - __u8 + - ``collocated_ref_idx`` + - + * - __u8 + - ``five_minus_max_num_merge_cand`` + - + * - __s8 + - ``slice_qp_delta`` + - + * - __s8 + - ``slice_cb_qp_offset`` + - + * - __s8 + - ``slice_cr_qp_offset`` + - + * - __s8 + - ``slice_act_y_qp_offset`` + - + * - __s8 + - ``slice_act_cb_qp_offset`` + - + * - __s8 + - ``slice_act_cr_qp_offset`` + - + * - __s8 + - ``slice_beta_offset_div2`` + - + * - __s8 + - ``slice_tc_offset_div2`` + - + * - __u8 + - ``pic_struct`` + - + * - __u8 + - ``num_active_dpb_entries`` + - The number of entries in ``dpb``. + * - __u8 + - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - The list of L0 reference elements as indices in the DPB. + * - __u8 + - ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - The list of L1 reference elements as indices in the DPB. + * - __u8 + - ``num_rps_poc_st_curr_before`` + - The number of reference pictures in the short-term set that come before + the current frame. + * - __u8 + - ``num_rps_poc_st_curr_after`` + - The number of reference pictures in the short-term set that come after + the current frame. + * - __u8 + - ``num_rps_poc_lt_curr`` + - The number of reference pictures in the long-term set. + * - __u8 + - ``padding[7]`` + - Applications and drivers must set this to zero. + * - struct :c:type:`v4l2_hevc_dpb_entry` + - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - The decoded picture buffer, for meta-data about reference frames. + * - struct :c:type:`v4l2_hevc_pred_weight_table` + - ``pred_weight_table`` + - The prediction weight coefficients for inter-picture prediction. + * - __u64 + - ``flags`` + - See :ref:`Slice Parameters Flags <hevc_slice_params_flags>` + +.. _hevc_slice_params_flags: + +``Slice Parameters Flags`` + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_LUMA`` + - 0x00000001 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_SAO_CHROMA`` + - 0x00000002 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_TEMPORAL_MVP_ENABLED`` + - 0x00000004 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_MVD_L1_ZERO`` + - 0x00000008 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_CABAC_INIT`` + - 0x00000010 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_COLLOCATED_FROM_L0`` + - 0x00000020 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_USE_INTEGER_MV`` + - 0x00000040 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_DEBLOCKING_FILTER_DISABLED`` + - 0x00000080 + - + * - ``V4L2_HEVC_SLICE_PARAMS_FLAG_SLICE_LOOP_FILTER_ACROSS_SLICES_ENABLED`` + - 0x00000100 + - + +.. c:type:: v4l2_hevc_dpb_entry + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_hevc_dpb_entry + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u64 + - ``timestamp`` + - Timestamp of the V4L2 capture buffer to use as reference, used + with B-coded and P-coded frames. The timestamp refers to the + ``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the + :c:func:`v4l2_timeval_to_ns()` function to convert the struct + :c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64. + * - __u8 + - ``rps`` + - The reference set for the reference frame + (V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_BEFORE, + V4L2_HEVC_DPB_ENTRY_RPS_ST_CURR_AFTER or + V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR) + * - __u8 + - ``field_pic`` + - Whether the reference is a field picture or a frame. + * - __u16 + - ``pic_order_cnt[2]`` + - The picture order count of the reference. Only the first element of the + array is used for frame pictures, while the first element identifies the + top field and the second the bottom field in field-coded pictures. + * - __u8 + - ``padding[2]`` + - Applications and drivers must set this to zero. + +.. c:type:: v4l2_hevc_pred_weight_table + +.. cssclass:: longtable + +.. flat-table:: struct v4l2_hevc_pred_weight_table + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - __u8 + - ``luma_log2_weight_denom`` + - + * - __s8 + - ``delta_chroma_log2_weight_denom`` + - + * - __s8 + - ``delta_luma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - + * - __s8 + - ``luma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - + * - __s8 + - ``delta_chroma_weight_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` + - + * - __s8 + - ``chroma_offset_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` + - + * - __s8 + - ``delta_luma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - + * - __s8 + - ``luma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]`` + - + * - __s8 + - ``delta_chroma_weight_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` + - + * - __s8 + - ``chroma_offset_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX][2]`` + - + * - __u8 + - ``padding[6]`` + - Applications and drivers must set this to zero. + +``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (enum)`` + Specifies the decoding mode to use. Currently exposes slice-based and + frame-based decoding but new modes might be added later on. + This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE + pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE + are required to set this control in order to specify the decoding mode + that is expected for the buffer. + Drivers may expose a single or multiple decoding modes, depending + on what they can support. + + .. note:: + + This menu control is not yet part of the public kernel API and + it is expected to change. + +.. c:type:: v4l2_mpeg_video_hevc_decode_mode + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED`` + - 0 + - Decoding is done at the slice granularity. + The OUTPUT buffer must contain a single slice. + * - ``V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_FRAME_BASED`` + - 1 + - Decoding is done at the frame granularity. + The OUTPUT buffer must contain all slices needed to decode the + frame. The OUTPUT buffer must also contain both fields. + +``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (enum)`` + Specifies the HEVC slice start code expected for each slice. + This control is used as a modifier for V4L2_PIX_FMT_HEVC_SLICE + pixel format. Applications that support V4L2_PIX_FMT_HEVC_SLICE + are required to set this control in order to specify the start code + that is expected for the buffer. + Drivers may expose a single or multiple start codes, depending + on what they can support. + + .. note:: + + This menu control is not yet part of the public kernel API and + it is expected to change. + +.. c:type:: v4l2_mpeg_video_hevc_start_code + +.. cssclass:: longtable + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + :widths: 1 1 2 + + * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_NONE`` + - 0 + - Selecting this value specifies that HEVC slices are passed + to the driver without any start code. + * - ``V4L2_MPEG_VIDEO_HEVC_START_CODE_ANNEX_B`` + - 1 + - Selecting this value specifies that HEVC slices are expected + to be prefixed by Annex B start codes. According to :ref:`hevc` + valid start codes can be 3-bytes 0x000001 or 4-bytes 0x00000001. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-flash.rst b/Documentation/media/uapi/v4l/ext-ctrls-flash.rst index eff056b17167..b9a6b08fbf32 100644 --- a/Documentation/media/uapi/v4l/ext-ctrls-flash.rst +++ b/Documentation/media/uapi/v4l/ext-ctrls-flash.rst @@ -98,7 +98,7 @@ Flash Control IDs V4L2_CID_FLASH_STROBE control. * - ``V4L2_FLASH_STROBE_SOURCE_EXTERNAL`` - The flash strobe is triggered by an external source. Typically - this is a sensor, which makes it possible to synchronises the + this is a sensor, which makes it possible to synchronise the flash strobe start to exposure start. diff --git a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst index 2c3ab5796d76..2d3e2b83d6dd 100644 --- a/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst +++ b/Documentation/media/uapi/v4l/ext-ctrls-image-source.rst @@ -55,3 +55,13 @@ Image Source Control IDs ``V4L2_CID_TEST_PATTERN_GREENB (integer)`` Test pattern green (next to blue) colour component. + +``V4L2_CID_UNIT_CELL_SIZE (struct)`` + This control returns the unit cell size in nanometers. The struct + :c:type:`v4l2_area` provides the width and the height in separate + fields to take into consideration asymmetric pixels. + This control does not take into consideration any possible hardware + binning. + The unit cell consists of the whole area of the pixel, sensitive and + non-sensitive. + This control is required for automatic calibration of sensors/cameras. diff --git a/Documentation/media/uapi/v4l/meta-formats.rst b/Documentation/media/uapi/v4l/meta-formats.rst index b10ca9ee3968..74c8659ee9d6 100644 --- a/Documentation/media/uapi/v4l/meta-formats.rst +++ b/Documentation/media/uapi/v4l/meta-formats.rst @@ -24,3 +24,4 @@ These formats are used for the :ref:`metadata` interface only. pixfmt-meta-uvc pixfmt-meta-vsp1-hgo pixfmt-meta-vsp1-hgt + pixfmt-meta-vivid diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst index 292fdc116c77..561bda112809 100644 --- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst +++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst @@ -61,10 +61,10 @@ Compressed Formats - ``V4L2_PIX_FMT_H264_SLICE`` - 'S264' - - H264 parsed slice data, without the start code and as - extracted from the H264 bitstream. This format is adapted for - stateless video decoders that implement an H264 pipeline - (using the :ref:`mem2mem` and :ref:`media-request-api`). + - H264 parsed slice data, including slice headers, either with or + without the start code, as extracted from the H264 bitstream. + This format is adapted for stateless video decoders that implement an + H264 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). This pixelformat has two modifiers that must be set at least once through the ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE`` and ``V4L2_CID_MPEG_VIDEO_H264_START_CODE`` controls. @@ -80,6 +80,10 @@ Compressed Formats appropriate number of macroblocks to decode a full corresponding frame to the matching capture buffer. + The syntax for this format is documented in :ref:`h264`, section + 7.3.2.8 "Slice layer without partitioning RBSP syntax" and the following + sections. + .. note:: This format is not yet part of the public kernel API and it @@ -188,6 +192,29 @@ Compressed Formats If :ref:`VIDIOC_ENUM_FMT` reports ``V4L2_FMT_FLAG_CONTINUOUS_BYTESTREAM`` then the decoder has no requirements since it can parse all the information from the raw bytestream. + * .. _V4L2-PIX-FMT-HEVC-SLICE: + + - ``V4L2_PIX_FMT_HEVC_SLICE`` + - 'S265' + - HEVC parsed slice data, as extracted from the HEVC bitstream. + This format is adapted for stateless video decoders that implement a + HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`). + This pixelformat has two modifiers that must be set at least once + through the ``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE`` + and ``V4L2_CID_MPEG_VIDEO_HEVC_START_CODE`` controls. + Metadata associated with the frame to decode is required to be passed + through the following controls : + * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS`` + * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS`` + * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS`` + See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`. + Buffers associated with this pixel format must contain the appropriate + number of macroblocks to decode a full corresponding frame. + + .. note:: + + This format is not yet part of the public kernel API and it + is expected to change. * .. _V4L2-PIX-FMT-FWHT: - ``V4L2_PIX_FMT_FWHT`` diff --git a/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst b/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst new file mode 100644 index 000000000000..eed20eaefe24 --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-meta-vivid.rst @@ -0,0 +1,60 @@ +.. This file is dual-licensed: you can use it either under the terms +.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this +.. dual licensing only applies to this file, and not this project as a +.. whole. +.. +.. a) This file is free software; you can redistribute it and/or +.. modify it under the terms of the GNU General Public License as +.. published by the Free Software Foundation version 2 of +.. the License. +.. +.. This file is distributed in the hope that it will be useful, +.. but WITHOUT ANY WARRANTY; without even the implied warranty of +.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +.. GNU General Public License for more details. +.. +.. Or, alternatively, +.. +.. b) Permission is granted to copy, distribute and/or modify this +.. document under the terms of the GNU Free Documentation License, +.. Version 1.1 or any later version published by the Free Software +.. Foundation, with no Invariant Sections, no Front-Cover Texts +.. and no Back-Cover Texts. A copy of the license is included at +.. Documentation/media/uapi/fdl-appendix.rst. +.. +.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections + +.. _v4l2-meta-fmt-vivid: + +******************************* +V4L2_META_FMT_VIVID ('VIVD') +******************************* + +VIVID Metadata Format + + +Description +=========== + +This describes metadata format used by the vivid driver. + +It sets Brightness, Saturation, Contrast and Hue, each of which maps to +corresponding controls of the vivid driver with respect to the range and default values. + +It contains the following fields: + +.. flat-table:: VIVID Metadata + :widths: 1 4 + :header-rows: 1 + :stub-columns: 0 + + * - Field + - Description + * - u16 brightness; + - Image brightness, the value is in the range 0 to 255, with the default value as 128. + * - u16 contrast; + - Image contrast, the value is in the range 0 to 255, with the default value as 128. + * - u16 saturation; + - Image color saturation, the value is in the range 0 to 255, with the default value as 128. + * - s16 hue; + - Image color balance, the value is in the range -128 to 128, with the default value as 0. diff --git a/Documentation/media/uapi/v4l/v4l2-selection-targets.rst b/Documentation/media/uapi/v4l/v4l2-selection-targets.rst index f74f239b0510..aae0c0013eb1 100644 --- a/Documentation/media/uapi/v4l/v4l2-selection-targets.rst +++ b/Documentation/media/uapi/v4l/v4l2-selection-targets.rst @@ -38,8 +38,10 @@ of the two interfaces they are used. * - ``V4L2_SEL_TGT_CROP_DEFAULT`` - 0x0001 - Suggested cropping rectangle that covers the "whole picture". + This includes only active pixels and excludes other non-active + pixels such as black pixels. + - Yes - Yes - - No * - ``V4L2_SEL_TGT_CROP_BOUNDS`` - 0x0002 - Bounds of the crop rectangle. All valid crop rectangles fit inside diff --git a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst index 57f0066f4cff..f1a504836f31 100644 --- a/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst +++ b/Documentation/media/uapi/v4l/vidioc-decoder-cmd.rst @@ -208,7 +208,15 @@ introduced in Linux 3.3. They are, however, mandatory for stateful mem2mem decod been started yet, the driver will return an ``EPERM`` error code. When the decoder is already running, this command does nothing. No flags are defined for this command. - + * - ``V4L2_DEC_CMD_FLUSH`` + - 4 + - Flush any held capture buffers. Only valid for stateless decoders. + This command is typically used when the application reached the + end of the stream and the last output buffer had the + ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag set. This would prevent + dequeueing the capture buffer containing the last decoded frame. + So this command can be used to explicitly flush that final decoded + frame. This command does nothing if there are no held capture buffers. Return Value ============ diff --git a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst b/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst index 13dc1a986249..271cac18afbb 100644 --- a/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst +++ b/Documentation/media/uapi/v4l/vidioc-g-ext-ctrls.rst @@ -199,6 +199,11 @@ still cause this situation. - A pointer to a matrix control of unsigned 32-bit values. Valid if this control is of type ``V4L2_CTRL_TYPE_U32``. * - + - :c:type:`v4l2_area` * + - ``p_area`` + - A pointer to a struct :c:type:`v4l2_area`. Valid if this control is + of type ``V4L2_CTRL_TYPE_AREA``. + * - - void * - ``ptr`` - A pointer to a compound type which can be an N-dimensional array diff --git a/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst b/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst index 7b6179627803..2d197e6bba8f 100644 --- a/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst +++ b/Documentation/media/uapi/v4l/vidioc-g-fbuf.rst @@ -63,7 +63,7 @@ EINVAL error code when overlays are not supported. To set the parameters for a *Video Output Overlay*, applications must initialize the ``flags`` field of a struct -struct :c:type:`v4l2_framebuffer`. Since the framebuffer is +:c:type:`v4l2_framebuffer`. Since the framebuffer is implemented on the TV card all other parameters are determined by the driver. When an application calls :ref:`VIDIOC_S_FBUF <VIDIOC_G_FBUF>` with a pointer to this structure, the driver prepares for the overlay and returns the diff --git a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst index a3d56ffbf4cc..6690928e657b 100644 --- a/Documentation/media/uapi/v4l/vidioc-queryctrl.rst +++ b/Documentation/media/uapi/v4l/vidioc-queryctrl.rst @@ -443,6 +443,12 @@ See also the examples in :ref:`control`. - n/a - A struct :c:type:`v4l2_ctrl_mpeg2_quantization`, containing MPEG-2 quantization matrices for stateless video decoders. + * - ``V4L2_CTRL_TYPE_AREA`` + - n/a + - n/a + - n/a + - A struct :c:type:`v4l2_area`, containing the width and the height + of a rectangular area. Units depend on the use case. * - ``V4L2_CTRL_TYPE_H264_SPS`` - n/a - n/a @@ -473,6 +479,24 @@ See also the examples in :ref:`control`. - n/a - A struct :c:type:`v4l2_ctrl_h264_decode_params`, containing H264 decode parameters for stateless video decoders. + * - ``V4L2_CTRL_TYPE_HEVC_SPS`` + - n/a + - n/a + - n/a + - A struct :c:type:`v4l2_ctrl_hevc_sps`, containing HEVC Sequence + Parameter Set for stateless video decoders. + * - ``V4L2_CTRL_TYPE_HEVC_PPS`` + - n/a + - n/a + - n/a + - A struct :c:type:`v4l2_ctrl_hevc_pps`, containing HEVC Picture + Parameter Set for stateless video decoders. + * - ``V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS`` + - n/a + - n/a + - n/a + - A struct :c:type:`v4l2_ctrl_hevc_slice_params`, containing HEVC + slice parameters for stateless video decoders. .. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}| diff --git a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst index d7faef10e39b..d0c643db477a 100644 --- a/Documentation/media/uapi/v4l/vidioc-reqbufs.rst +++ b/Documentation/media/uapi/v4l/vidioc-reqbufs.rst @@ -125,6 +125,7 @@ aborting or finishing any DMA in progress, an implicit .. _V4L2-BUF-CAP-SUPPORTS-DMABUF: .. _V4L2-BUF-CAP-SUPPORTS-REQUESTS: .. _V4L2-BUF-CAP-SUPPORTS-ORPHANED-BUFS: +.. _V4L2-BUF-CAP-SUPPORTS-M2M-HOLD-CAPTURE-BUF: .. cssclass:: longtable @@ -150,6 +151,11 @@ aborting or finishing any DMA in progress, an implicit - The kernel allows calling :ref:`VIDIOC_REQBUFS` while buffers are still mapped or exported via DMABUF. These orphaned buffers will be freed when they are unmapped or when the exported DMABUF fds are closed. + * - ``V4L2_BUF_CAP_SUPPORTS_M2M_HOLD_CAPTURE_BUF`` + - 0x00000020 + - Only valid for stateless decoders. If set, then userspace can set the + ``V4L2_BUF_FLAG_M2M_HOLD_CAPTURE_BUF`` flag to hold off on returning the + capture buffer until the OUTPUT timestamp changes. Return Value ============ diff --git a/Documentation/media/v4l-drivers/imx.rst b/Documentation/media/v4l-drivers/imx.rst index 1d7eb8c7bd5c..1246573c1019 100644 --- a/Documentation/media/v4l-drivers/imx.rst +++ b/Documentation/media/v4l-drivers/imx.rst @@ -515,10 +515,10 @@ Streaming can then begin independently on the capture device nodes be used to select any supported YUV pixelformat on the capture device nodes, including planar. -SabreAuto with ADV7180 decoder ------------------------------- +i.MX6Q SabreAuto with ADV7180 decoder +------------------------------------- -On the SabreAuto, an on-board ADV7180 SD decoder is connected to the +On the i.MX6Q SabreAuto, an on-board ADV7180 SD decoder is connected to the parallel bus input on the internal video mux to IPU1 CSI0. The following example configures a pipeline to capture from the ADV7180 @@ -547,8 +547,6 @@ This example configures a pipeline to capture from the ADV7180 video decoder, assuming PAL 720x576 input signals, with Motion Compensated de-interlacing. The adv7180 must output sequential or alternating fields (field type 'seq-tb' for PAL, or 'alternate'). -$outputfmt can be any format supported by the ipu1_ic_prpvf entity -at its output pad: .. code-block:: none @@ -565,11 +563,70 @@ at its output pad: media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/720x576]" media-ctl -V "'ipu1_vdic':2 [fmt:AYUV32/720x576 field:none]" media-ctl -V "'ipu1_ic_prp':2 [fmt:AYUV32/720x576 field:none]" - media-ctl -V "'ipu1_ic_prpvf':1 [fmt:$outputfmt field:none]" + media-ctl -V "'ipu1_ic_prpvf':1 [fmt:AYUV32/720x576 field:none]" + # Configure "ipu1_ic_prpvf capture" interface (assumed at /dev/video2) + v4l2-ctl -d2 --set-fmt-video=field=none + +Streaming can then begin on /dev/video2. The v4l2-ctl tool can also be +used to select any supported YUV pixelformat on /dev/video2. + +This platform accepts Composite Video analog inputs to the ADV7180 on +Ain1 (connector J42). + +i.MX6DL SabreAuto with ADV7180 decoder +-------------------------------------- + +On the i.MX6DL SabreAuto, an on-board ADV7180 SD decoder is connected to the +parallel bus input on the internal video mux to IPU1 CSI0. + +The following example configures a pipeline to capture from the ADV7180 +video decoder, assuming NTSC 720x480 input signals, using simple +interweave (unconverted and without motion compensation). The adv7180 +must output sequential or alternating fields (field type 'seq-bt' for +NTSC, or 'alternate'): + +.. code-block:: none + + # Setup links + media-ctl -l "'adv7180 4-0021':0 -> 'ipu1_csi0_mux':4[1]" + media-ctl -l "'ipu1_csi0_mux':5 -> 'ipu1_csi0':0[1]" + media-ctl -l "'ipu1_csi0':2 -> 'ipu1_csi0 capture':0[1]" + # Configure pads + media-ctl -V "'adv7180 4-0021':0 [fmt:UYVY2X8/720x480 field:seq-bt]" + media-ctl -V "'ipu1_csi0_mux':5 [fmt:UYVY2X8/720x480]" + media-ctl -V "'ipu1_csi0':2 [fmt:AYUV32/720x480]" + # Configure "ipu1_csi0 capture" interface (assumed at /dev/video0) + v4l2-ctl -d0 --set-fmt-video=field=interlaced_bt + +Streaming can then begin on /dev/video0. The v4l2-ctl tool can also be +used to select any supported YUV pixelformat on /dev/video0. + +This example configures a pipeline to capture from the ADV7180 +video decoder, assuming PAL 720x576 input signals, with Motion +Compensated de-interlacing. The adv7180 must output sequential or +alternating fields (field type 'seq-tb' for PAL, or 'alternate'). + +.. code-block:: none + + # Setup links + media-ctl -l "'adv7180 4-0021':0 -> 'ipu1_csi0_mux':4[1]" + media-ctl -l "'ipu1_csi0_mux':5 -> 'ipu1_csi0':0[1]" + media-ctl -l "'ipu1_csi0':1 -> 'ipu1_vdic':0[1]" + media-ctl -l "'ipu1_vdic':2 -> 'ipu1_ic_prp':0[1]" + media-ctl -l "'ipu1_ic_prp':2 -> 'ipu1_ic_prpvf':0[1]" + media-ctl -l "'ipu1_ic_prpvf':1 -> 'ipu1_ic_prpvf capture':0[1]" + # Configure pads + media-ctl -V "'adv7180 4-0021':0 [fmt:UYVY2X8/720x576 field:seq-tb]" + media-ctl -V "'ipu1_csi0_mux':5 [fmt:UYVY2X8/720x576]" + media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/720x576]" + media-ctl -V "'ipu1_vdic':2 [fmt:AYUV32/720x576 field:none]" + media-ctl -V "'ipu1_ic_prp':2 [fmt:AYUV32/720x576 field:none]" + media-ctl -V "'ipu1_ic_prpvf':1 [fmt:AYUV32/720x576 field:none]" + # Configure "ipu1_ic_prpvf capture" interface (assumed at /dev/video2) + v4l2-ctl -d2 --set-fmt-video=field=none -Streaming can then begin on the capture device node at -"ipu1_ic_prpvf capture". The v4l2-ctl tool can be used to select any -supported YUV or RGB pixelformat on the capture device node. +Streaming can then begin on /dev/video2. The v4l2-ctl tool can also be +used to select any supported YUV pixelformat on /dev/video2. This platform accepts Composite Video analog inputs to the ADV7180 on Ain1 (connector J42). diff --git a/Documentation/media/v4l-drivers/ipu3.rst b/Documentation/media/v4l-drivers/ipu3.rst index c9f780404eee..e4904ab44e60 100644 --- a/Documentation/media/v4l-drivers/ipu3.rst +++ b/Documentation/media/v4l-drivers/ipu3.rst @@ -265,19 +265,56 @@ below. yavta -w "0x009819A1 1" /dev/v4l-subdev7 -RAW Bayer frames go through the following ImgU pipeline HW blocks to have the +Certain hardware blocks in ImgU pipeline can change the frame resolution by +cropping or scaling, these hardware blocks include Input Feeder(IF), Bayer Down +Scaler (BDS) and Geometric Distortion Correction (GDC). +There is also a block which can change the frame resolution - YUV Scaler, it is +only applicable to the secondary output. + +RAW Bayer frames go through these ImgU pipeline hardware blocks and the final processed image output to the DDR memory. -RAW Bayer frame -> Input Feeder -> Bayer Down Scaling (BDS) -> Geometric -Distortion Correction (GDC) -> DDR +.. kernel-figure:: ipu3_rcb.svg + :alt: ipu3 resolution blocks image -The ImgU V4L2 subdev has to be configured with the supported resolutions in all -the above HW blocks, for a given input resolution. + IPU3 resolution change hardware blocks + +**Input Feeder** + +Input Feeder gets the Bayer frame data from the sensor, it can enable cropping +of lines and columns from the frame and then store pixels into device's internal +pixel buffer which are ready to readout by following blocks. + +**Bayer Down Scaler** + +Bayer Down Scaler is capable of performing image scaling in Bayer domain, the +downscale factor can be configured from 1X to 1/4X in each axis with +configuration steps of 0.03125 (1/32). +**Geometric Distortion Correction** + +Geometric Distortion Correction is used to performe correction of distortions +and image filtering. It needs some extra filter and envelop padding pixels to +work, so the input resolution of GDC should be larger than the output +resolution. + +**YUV Scaler** + +YUV Scaler which similar with BDS, but it is mainly do image down scaling in +YUV domain, it can support up to 1/12X down scaling, but it can not be applied +to the main output. + +The ImgU V4L2 subdev has to be configured with the supported resolutions in all +the above hardware blocks, for a given input resolution. For a given supported resolution for an input frame, the Input Feeder, Bayer -Down Scaling and GDC blocks should be configured with the supported resolutions. -This information can be obtained by looking at the following IPU3 ImgU -configuration table. +Down Scaler and GDC blocks should be configured with the supported resolutions +as each hardware block has its own alignment requirement. + +You must configure the output resolution of the hardware blocks smartly to meet +the hardware requirement along with keeping the maximum field of view. +The intermediate resolutions can be generated by specific tool and this +information can be obtained by looking at the following IPU3 ImgU configuration +table. https://chromium.googlesource.com/chromiumos/overlays/board-overlays/+/master diff --git a/Documentation/media/v4l-drivers/ipu3_rcb.svg b/Documentation/media/v4l-drivers/ipu3_rcb.svg new file mode 100644 index 000000000000..d878421b42a0 --- /dev/null +++ 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You should pass -those arguments to each subdevice, not to the vimc module. For example:: +Module options +-------------- - vimc_subdevice.param=value +Vimc has a module parameter to configure the driver. -* ``vimc_scaler.sca_mult=<unsigned int>`` +* ``sca_mult=<unsigned int>`` Image size multiplier factor to be used to multiply both width and height, so the image size will be ``sca_mult^2`` bigger than the original one. Currently, only supports scaling up (the default value is 3). -* ``vimc_debayer.deb_mean_win_size=<unsigned int>`` - - Window size to calculate the mean. Note: the window size needs to be an - odd number, as the main pixel stays in the center of the window, - otherwise the next odd number is considered (the default value is 3). - Source code documentation ------------------------- diff --git a/Documentation/media/videodev2.h.rst.exceptions b/Documentation/media/videodev2.h.rst.exceptions index adeb6b7a15cb..cb6ccf91776e 100644 --- a/Documentation/media/videodev2.h.rst.exceptions +++ b/Documentation/media/videodev2.h.rst.exceptions @@ -141,6 +141,10 @@ replace symbol V4L2_CTRL_TYPE_H264_PPS :c:type:`v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_H264_SCALING_MATRIX :c:type:`v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_H264_SLICE_PARAMS :c:type:`v4l2_ctrl_type` replace symbol V4L2_CTRL_TYPE_H264_DECODE_PARAMS :c:type:`v4l2_ctrl_type` +replace symbol V4L2_CTRL_TYPE_HEVC_SPS :c:type:`v4l2_ctrl_type` +replace symbol V4L2_CTRL_TYPE_HEVC_PPS :c:type:`v4l2_ctrl_type` +replace symbol V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS :c:type:`v4l2_ctrl_type` +replace symbol V4L2_CTRL_TYPE_AREA :c:type:`v4l2_ctrl_type` # V4L2 capability defines replace define V4L2_CAP_VIDEO_CAPTURE device-capabilities @@ -434,6 +438,7 @@ replace define V4L2_DEC_CMD_START decoder-cmds replace define V4L2_DEC_CMD_STOP decoder-cmds replace define V4L2_DEC_CMD_PAUSE decoder-cmds replace define V4L2_DEC_CMD_RESUME decoder-cmds +replace define V4L2_DEC_CMD_FLUSH decoder-cmds replace define V4L2_DEC_CMD_START_MUTE_AUDIO decoder-cmds replace define V4L2_DEC_CMD_PAUSE_TO_BLACK decoder-cmds |
