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EIGHTH NOTE”h]”hŒ♪”…””}”hjÔsbah}”(h]”h ]”h"]”Œsung”ah$]”h&]”uh1håh³hÖh´KJhhh²hubhæ)”}”(hŒ0.. |sup1| unicode:: U+000B9 .. SUPERSCRIPT ONE”h]”hŒ¹”…””}”hjãsbah}”(h]”h ]”h"]”Œsup1”ah$]”h&]”uh1håh³hÖh´KKhhh²hubhæ)”}”(hŒ0.. |sup2| unicode:: U+000B2 .. SUPERSCRIPT TWO”h]”hŒ²”…””}”hjòsbah}”(h]”h ]”h"]”Œsup2”ah$]”h&]”uh1håh³hÖh´KLhhh²hubhæ)”}”(hŒ2.. |sup3| unicode:: U+000B3 .. SUPERSCRIPT THREE”h]”hŒ³”…””}”hjsbah}”(h]”h ]”h"]”Œsup3”ah$]”h&]”uh1håh³hÖh´KMhhh²hubhæ)”}”(hŒ4.. |times| unicode:: U+000D7 .. MULTIPLICATION SIGN”h]”hŒ×”…””}”hjsbah}”(h]”h ]”h"]”Œtimes”ah$]”h&]”uh1håh³hÖh´KNhhh²hubhæ)”}”(hŒ0.. |trade| unicode:: U+02122 .. TRADE MARK SIGN”h]”hŒâ„¢”…””}”hjsbah}”(h]”h ]”h"]”Œtrade”ah$]”h&]”uh1håh³hÖh´KOhhh²hubhæ)”}”(hŒ... |uarr| unicode:: U+02191 .. UPWARDS ARROW”h]”hŒ↑”…””}”hj.sbah}”(h]”h ]”h"]”Œuarr”ah$]”h&]”uh1håh³hÖh´KPhhh²hubhæ)”}”(hŒ... |verbar| unicode:: U+0007C .. VERTICAL LINE”h]”hŒ|”…””}”hj=sbah}”(h]”h ]”h"]”Œverbar”ah$]”h&]”uh1håh³hÖh´KQhhh²hubhæ)”}”(hŒ*.. |yen| unicode:: U+000A5 .. YEN SIGN ”h]”hŒÂ¥”…””}”hjLsbah}”(h]”h ]”h"]”Œyen”ah$]”h&]”uh1håh³hÖh´KRhhh²hubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒNPCM video driver”h]”hŒNPCM video driver”…””}”(hjbh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j`hj]h²hh³hÇh´KubhŒ paragraph”“”)”}”(hX%This driver is used to control the Video Capture/Differentiation (VCD) engine and Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs. The VCD can capture a frame from digital video input and compare two frames in memory, and the ECE can compress the frame data into HEXTILE format.”h]”hX%This driver is used to control the Video Capture/Differentiation (VCD) engine and Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs. The VCD can capture a frame from digital video input and compare two frames in memory, and the ECE can compress the frame data into HEXTILE format.”…””}”(hjrh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´Khj]h²hubj\)”}”(hhh]”(ja)”}”(hŒDriver-specific Controls”h]”hŒDriver-specific Controls”…””}”(hjƒh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j`hj€h²hh³hÇh´Kubj\)”}”(hhh]”(ja)”}”(hŒV4L2_CID_NPCM_CAPTURE_MODE”h]”hŒV4L2_CID_NPCM_CAPTURE_MODE”…””}”(hj”h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j`hj‘h²hh³hÇh´Kubjq)”}”(hŒ"The VCD engine supports two modes:”h]”hŒ"The VCD engine supports two modes:”…””}”(hj¢h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´Khj‘h²hubhŒ bullet_list”“”)”}”(hhh]”(hŒ list_item”“”)”}”(hŒ=COMPLETE mode: Capture the next complete frame into memory. ”h]”(jq)”}”(hŒCOMPLETE mode:”h]”hŒCOMPLETE mode:”…””}”(hj»h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´Khj·ubjq)”}”(hŒ,Capture the next complete frame into memory.”h]”hŒ,Capture the next complete frame into memory.”…””}”(hjÉh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´Khj·ubeh}”(h]”h ]”h"]”h$]”h&]”uh1jµhj²h²hh³hÇh´Nubj¶)”}”(hŒxDIFF mode: Compare the incoming frame with the frame stored in memory, and updates the differentiated frame in memory. ”h]”(jq)”}”(hŒ DIFF mode:”h]”hŒ DIFF mode:”…””}”(hjáh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´KhjÝubjq)”}”(hŒkCompare the incoming frame with the frame stored in memory, and updates the differentiated frame in memory.”h]”hŒkCompare the incoming frame with the frame stored in memory, and updates the differentiated frame in memory.”…””}”(hjïh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´KhjÝubeh}”(h]”h ]”h"]”h$]”h&]”uh1jµhj²h²hh³hÇh´Nubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1j°h³hÇh´Khj‘h²hubjq)”}”(hŒ‹Application can use ``V4L2_CID_NPCM_CAPTURE_MODE`` control to set the VCD mode with different control values (enum v4l2_npcm_capture_mode):”h]”(hŒApplication can use ”…””}”(hj h²hh³Nh´NubhŒliteral”“”)”}”(hŒ``V4L2_CID_NPCM_CAPTURE_MODE``”h]”hŒV4L2_CID_NPCM_CAPTURE_MODE”…””}”(hjh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jhj ubhŒY control to set the VCD mode with different control values (enum v4l2_npcm_capture_mode):”…””}”(hj h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´Khj‘h²hubj±)”}”(hhh]”(j¶)”}”(hŒC``V4L2_NPCM_CAPTURE_MODE_COMPLETE``: will set VCD to COMPLETE mode.”h]”jq)”}”(hj2h]”(j)”}”(hŒ#``V4L2_NPCM_CAPTURE_MODE_COMPLETE``”h]”hŒV4L2_NPCM_CAPTURE_MODE_COMPLETE”…””}”(hj7h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jhj4ubhŒ : will set VCD to COMPLETE mode.”…””}”(hj4h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´K!hj0ubah}”(h]”h ]”h"]”h$]”h&]”uh1jµhj-h²hh³hÇh´Nubj¶)”}”(hŒ<``V4L2_NPCM_CAPTURE_MODE_DIFF``: will set VCD to DIFF mode. ”h]”jq)”}”(hŒ;``V4L2_NPCM_CAPTURE_MODE_DIFF``: will set VCD to DIFF mode.”h]”(j)”}”(hŒ``V4L2_NPCM_CAPTURE_MODE_DIFF``”h]”hŒV4L2_NPCM_CAPTURE_MODE_DIFF”…””}”(hj]h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjYubhŒ: will set VCD to DIFF mode.”…””}”(hjYh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´K"hjUubah}”(h]”h ]”h"]”h$]”h&]”uh1jµhj-h²hh³hÇh´Nubeh}”(h]”h ]”h"]”h$]”h&]”j j uh1j°h³hÇh´K!hj‘h²hubeh}”(h]”Œv4l2-cid-npcm-capture-mode”ah ]”h"]”Œv4l2_cid_npcm_capture_mode”ah$]”h&]”uh1j[hj€h²hh³hÇh´Kubj\)”}”(hhh]”(ja)”}”(hŒV4L2_CID_NPCM_RECT_COUNT”h]”hŒV4L2_CID_NPCM_RECT_COUNT”…””}”(hjŒh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j`hj‰h²hh³hÇh´K%ubjq)”}”(hŒÜIf using V4L2_PIX_FMT_HEXTILE format, VCD will capture frame data and then ECE will compress the data into HEXTILE rectangles and store them in V4L2 video buffer with the layout defined in Remote Framebuffer Protocol: ::”h]”hŒÙIf using V4L2_PIX_FMT_HEXTILE format, VCD will capture frame data and then ECE will compress the data into HEXTILE rectangles and store them in V4L2 video buffer with the layout defined in Remote Framebuffer Protocol:”…””}”(hjšh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´K'hj‰h²hubhŒ literal_block”“”)”}”(hX‚(RFC 6143, https://www.rfc-editor.org/rfc/rfc6143.html#section-7.6.1) +--------------+--------------+-------------------+ | No. of bytes | Type [Value] | Description | +--------------+--------------+-------------------+ | 2 | U16 | x-position | | 2 | U16 | y-position | | 2 | U16 | width | | 2 | U16 | height | | 4 | S32 | encoding-type (5) | +--------------+--------------+-------------------+ | HEXTILE rectangle data | +-------------------------------------------------+”h]”hX‚(RFC 6143, https://www.rfc-editor.org/rfc/rfc6143.html#section-7.6.1) +--------------+--------------+-------------------+ | No. of bytes | Type [Value] | Description | +--------------+--------------+-------------------+ | 2 | U16 | x-position | | 2 | U16 | y-position | | 2 | U16 | width | | 2 | U16 | height | | 4 | S32 | encoding-type (5) | +--------------+--------------+-------------------+ | HEXTILE rectangle data | +-------------------------------------------------+”…””}”hjªsbah}”(h]”h ]”h"]”h$]”h&]”hÅhÆuh1j¨h³hÇh´K,hj‰h²hubjq)”}”(hŒ¯Application can get the video buffer through VIDIOC_DQBUF, and followed by calling ``V4L2_CID_NPCM_RECT_COUNT`` control to get the number of HEXTILE rectangles in this buffer.”h]”(hŒSApplication can get the video buffer through VIDIOC_DQBUF, and followed by calling ”…””}”(hj¸h²hh³Nh´Nubj)”}”(hŒ``V4L2_CID_NPCM_RECT_COUNT``”h]”hŒV4L2_CID_NPCM_RECT_COUNT”…””}”(hjÀh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1jhj¸ubhŒ@ control to get the number of HEXTILE rectangles in this buffer.”…””}”(hj¸h²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1jph³hÇh´K:hj‰h²hubeh}”(h]”Œv4l2-cid-npcm-rect-count”ah ]”h"]”Œv4l2_cid_npcm_rect_count”ah$]”h&]”uh1j[hj€h²hh³hÇh´K%ubeh}”(h]”Œdriver-specific-controls”ah ]”h"]”Œdriver-specific controls”ah$]”h&]”uh1j[hj]h²hh³hÇh´Kubj\)”}”(hhh]”(ja)”}”(hŒ References”h]”hŒ References”…””}”(hjëh²hh³Nh´Nubah}”(h]”h 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