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diff --git a/Documentation/media/uapi/dvb/fe_property_parameters.rst b/Documentation/media/uapi/dvb/fe_property_parameters.rst deleted file mode 100644 index 2fd2954d8dae..000000000000 --- a/Documentation/media/uapi/dvb/fe_property_parameters.rst +++ /dev/null @@ -1,1014 +0,0 @@ -.. 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 GFDL-1.1-or-later WITH no-invariant-sections - -.. _fe_property_parameters: - -****************************** -Digital TV property parameters -****************************** - -There are several different Digital TV parameters that can be used by -:ref:`FE_SET_PROPERTY and FE_GET_PROPERTY ioctls<FE_GET_PROPERTY>`. -This section describes each of them. Please notice, however, that only -a subset of them are needed to setup a frontend. - - -.. _DTV-UNDEFINED: - -DTV_UNDEFINED -============= - -Used internally. A GET/SET operation for it won't change or return -anything. - - -.. _DTV-TUNE: - -DTV_TUNE -======== - -Interpret the cache of data, build either a traditional frontend -tunerequest so we can pass validation in the ``FE_SET_FRONTEND`` ioctl. - - -.. _DTV-CLEAR: - -DTV_CLEAR -========= - -Reset a cache of data specific to the frontend here. This does not -effect hardware. - - -.. _DTV-FREQUENCY: - -DTV_FREQUENCY -============= - -Frequency of the digital TV transponder/channel. - -.. note:: - - #. For satellite delivery systems, the frequency is in kHz. - - #. For cable and terrestrial delivery systems, the frequency is in - Hz. - - #. On most delivery systems, the frequency is the center frequency - of the transponder/channel. The exception is for ISDB-T, where - the main carrier has a 1/7 offset from the center. - - #. For ISDB-T, the channels are usually transmitted with an offset of - about 143kHz. E.g. a valid frequency could be 474,143 kHz. The - stepping is bound to the bandwidth of the channel which is - typically 6MHz. - - #. In ISDB-Tsb, the channel consists of only one or three segments the - frequency step is 429kHz, 3*429 respectively. - - -.. _DTV-MODULATION: - -DTV_MODULATION -============== - -Specifies the frontend modulation type for delivery systems that -supports more multiple modulations. - -The modulation can be one of the types defined by enum :c:type:`fe_modulation`. - -Most of the digital TV standards offers more than one possible -modulation type. - -The table below presents a summary of the types of modulation types -supported by each delivery system, as currently defined by specs. - -======================= ======================================================= -Standard Modulation types -======================= ======================================================= -ATSC (version 1) 8-VSB and 16-VSB. -DMTB 4-QAM, 16-QAM, 32-QAM, 64-QAM and 4-QAM-NR. -DVB-C Annex A/C 16-QAM, 32-QAM, 64-QAM and 256-QAM. -DVB-C Annex B 64-QAM. -DVB-T QPSK, 16-QAM and 64-QAM. -DVB-T2 QPSK, 16-QAM, 64-QAM and 256-QAM. -DVB-S No need to set. It supports only QPSK. -DVB-S2 QPSK, 8-PSK, 16-APSK and 32-APSK. -ISDB-T QPSK, DQPSK, 16-QAM and 64-QAM. -ISDB-S 8-PSK, QPSK and BPSK. -======================= ======================================================= - -.. note:: - - Please notice that some of the above modulation types may not be - defined currently at the Kernel. The reason is simple: no driver - needed such definition yet. - - -.. _DTV-BANDWIDTH-HZ: - -DTV_BANDWIDTH_HZ -================ - -Bandwidth for the channel, in HZ. - -Should be set only for terrestrial delivery systems. - -Possible values: ``1712000``, ``5000000``, ``6000000``, ``7000000``, -``8000000``, ``10000000``. - -======================= ======================================================= -Terrestrial Standard Possible values for bandwidth -======================= ======================================================= -ATSC (version 1) No need to set. It is always 6MHz. -DMTB No need to set. It is always 8MHz. -DVB-T 6MHz, 7MHz and 8MHz. -DVB-T2 1.172 MHz, 5MHz, 6MHz, 7MHz, 8MHz and 10MHz -ISDB-T 5MHz, 6MHz, 7MHz and 8MHz, although most places - use 6MHz. -======================= ======================================================= - - -.. note:: - - - #. For ISDB-Tsb, the bandwidth can vary depending on the number of - connected segments. - - It can be easily derived from other parameters - (DTV_ISDBT_SB_SEGMENT_IDX, DTV_ISDBT_SB_SEGMENT_COUNT). - - #. On Satellite and Cable delivery systems, the bandwidth depends on - the symbol rate. So, the Kernel will silently ignore any setting - :ref:`DTV-BANDWIDTH-HZ`. I will however fill it back with a - bandwidth estimation. - - Such bandwidth estimation takes into account the symbol rate set with - :ref:`DTV-SYMBOL-RATE`, and the rolloff factor, with is fixed for - DVB-C and DVB-S. - - For DVB-S2, the rolloff should also be set via :ref:`DTV-ROLLOFF`. - - -.. _DTV-INVERSION: - -DTV_INVERSION -============= - -Specifies if the frontend should do spectral inversion or not. - -The acceptable values are defined by :c:type:`fe_spectral_inversion`. - - -.. _DTV-DISEQC-MASTER: - -DTV_DISEQC_MASTER -================= - -Currently not implemented. - - -.. _DTV-SYMBOL-RATE: - -DTV_SYMBOL_RATE -=============== - -Used on cable and satellite delivery systems. - -Digital TV symbol rate, in bauds (symbols/second). - - -.. _DTV-INNER-FEC: - -DTV_INNER_FEC -============= - -Used on cable and satellite delivery systems. - -The acceptable values are defined by :c:type:`fe_code_rate`. - - -.. _DTV-VOLTAGE: - -DTV_VOLTAGE -=========== - -Used on satellite delivery systems. - -The voltage is usually used with non-DiSEqC capable LNBs to switch the -polarzation (horizontal/vertical). When using DiSEqC epuipment this -voltage has to be switched consistently to the DiSEqC commands as -described in the DiSEqC spec. - -The acceptable values are defined by :c:type:`fe_sec_voltage`. - - -.. _DTV-TONE: - -DTV_TONE -======== - -Currently not used. - - -.. _DTV-PILOT: - -DTV_PILOT -========= - -Used on DVB-S2. - -Sets DVB-S2 pilot. - -The acceptable values are defined by :c:type:`fe_pilot`. - - -.. _DTV-ROLLOFF: - -DTV_ROLLOFF -=========== - -Used on DVB-S2. - -Sets DVB-S2 rolloff. - -The acceptable values are defined by :c:type:`fe_rolloff`. - - -.. _DTV-DISEQC-SLAVE-REPLY: - -DTV_DISEQC_SLAVE_REPLY -====================== - -Currently not implemented. - - -.. _DTV-FE-CAPABILITY-COUNT: - -DTV_FE_CAPABILITY_COUNT -======================= - -Currently not implemented. - - -.. _DTV-FE-CAPABILITY: - -DTV_FE_CAPABILITY -================= - -Currently not implemented. - - -.. _DTV-DELIVERY-SYSTEM: - -DTV_DELIVERY_SYSTEM -=================== - -Specifies the type of the delivery system. - -The acceptable values are defined by :c:type:`fe_delivery_system`. - - -.. _DTV-ISDBT-PARTIAL-RECEPTION: - -DTV_ISDBT_PARTIAL_RECEPTION -=========================== - -Used only on ISDB. - -If ``DTV_ISDBT_SOUND_BROADCASTING`` is '0' this bit-field represents -whether the channel is in partial reception mode or not. - -If '1' ``DTV_ISDBT_LAYERA_*`` values are assigned to the center segment -and ``DTV_ISDBT_LAYERA_SEGMENT_COUNT`` has to be '1'. - -If in addition ``DTV_ISDBT_SOUND_BROADCASTING`` is '1' -``DTV_ISDBT_PARTIAL_RECEPTION`` represents whether this ISDB-Tsb channel -is consisting of one segment and layer or three segments and two layers. - -Possible values: 0, 1, -1 (AUTO) - - -.. _DTV-ISDBT-SOUND-BROADCASTING: - -DTV_ISDBT_SOUND_BROADCASTING -============================ - -Used only on ISDB. - -This field represents whether the other DTV_ISDBT_*-parameters are -referring to an ISDB-T and an ISDB-Tsb channel. (See also -``DTV_ISDBT_PARTIAL_RECEPTION``). - -Possible values: 0, 1, -1 (AUTO) - - -.. _DTV-ISDBT-SB-SUBCHANNEL-ID: - -DTV_ISDBT_SB_SUBCHANNEL_ID -========================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -(Note of the author: This might not be the correct description of the -``SUBCHANNEL-ID`` in all details, but it is my understanding of the -technical background needed to program a device) - -An ISDB-Tsb channel (1 or 3 segments) can be broadcasted alone or in a -set of connected ISDB-Tsb channels. In this set of channels every -channel can be received independently. The number of connected ISDB-Tsb -segment can vary, e.g. depending on the frequency spectrum bandwidth -available. - -Example: Assume 8 ISDB-Tsb connected segments are broadcasted. The -broadcaster has several possibilities to put those channels in the air: -Assuming a normal 13-segment ISDB-T spectrum he can align the 8 segments -from position 1-8 to 5-13 or anything in between. - -The underlying layer of segments are subchannels: each segment is -consisting of several subchannels with a predefined IDs. A sub-channel -is used to help the demodulator to synchronize on the channel. - -An ISDB-T channel is always centered over all sub-channels. As for the -example above, in ISDB-Tsb it is no longer as simple as that. - -``The DTV_ISDBT_SB_SUBCHANNEL_ID`` parameter is used to give the -sub-channel ID of the segment to be demodulated. - -Possible values: 0 .. 41, -1 (AUTO) - - -.. _DTV-ISDBT-SB-SEGMENT-IDX: - -DTV_ISDBT_SB_SEGMENT_IDX -======================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -``DTV_ISDBT_SB_SEGMENT_IDX`` gives the index of the segment to be -demodulated for an ISDB-Tsb channel where several of them are -transmitted in the connected manner. - -Possible values: 0 .. ``DTV_ISDBT_SB_SEGMENT_COUNT`` - 1 - -Note: This value cannot be determined by an automatic channel search. - - -.. _DTV-ISDBT-SB-SEGMENT-COUNT: - -DTV_ISDBT_SB_SEGMENT_COUNT -========================== - -Used only on ISDB. - -This field only applies if ``DTV_ISDBT_SOUND_BROADCASTING`` is '1'. - -``DTV_ISDBT_SB_SEGMENT_COUNT`` gives the total count of connected -ISDB-Tsb channels. - -Possible values: 1 .. 13 - -Note: This value cannot be determined by an automatic channel search. - - -.. _isdb-hierq-layers: - -DTV-ISDBT-LAYER[A-C] parameters -=============================== - -Used only on ISDB. - -ISDB-T channels can be coded hierarchically. As opposed to DVB-T in -ISDB-T hierarchical layers can be decoded simultaneously. For that -reason a ISDB-T demodulator has 3 Viterbi and 3 Reed-Solomon decoders. - -ISDB-T has 3 hierarchical layers which each can use a part of the -available segments. The total number of segments over all layers has to -13 in ISDB-T. - -There are 3 parameter sets, for Layers A, B and C. - - -.. _DTV-ISDBT-LAYER-ENABLED: - -DTV_ISDBT_LAYER_ENABLED ------------------------ - -Used only on ISDB. - -Hierarchical reception in ISDB-T is achieved by enabling or disabling -layers in the decoding process. Setting all bits of -``DTV_ISDBT_LAYER_ENABLED`` to '1' forces all layers (if applicable) to -be demodulated. This is the default. - -If the channel is in the partial reception mode -(``DTV_ISDBT_PARTIAL_RECEPTION`` = 1) the central segment can be decoded -independently of the other 12 segments. In that mode layer A has to have -a ``SEGMENT_COUNT`` of 1. - -In ISDB-Tsb only layer A is used, it can be 1 or 3 in ISDB-Tsb according -to ``DTV_ISDBT_PARTIAL_RECEPTION``. ``SEGMENT_COUNT`` must be filled -accordingly. - -Only the values of the first 3 bits are used. Other bits will be silently ignored: - -``DTV_ISDBT_LAYER_ENABLED`` bit 0: layer A enabled - -``DTV_ISDBT_LAYER_ENABLED`` bit 1: layer B enabled - -``DTV_ISDBT_LAYER_ENABLED`` bit 2: layer C enabled - -``DTV_ISDBT_LAYER_ENABLED`` bits 3-31: unused - - -.. _DTV-ISDBT-LAYER-FEC: - -DTV_ISDBT_LAYER[A-C]_FEC ------------------------- - -Used only on ISDB. - -The Forward Error Correction mechanism used by a given ISDB Layer, as -defined by :c:type:`fe_code_rate`. - - -Possible values are: ``FEC_AUTO``, ``FEC_1_2``, ``FEC_2_3``, ``FEC_3_4``, -``FEC_5_6``, ``FEC_7_8`` - - -.. _DTV-ISDBT-LAYER-MODULATION: - -DTV_ISDBT_LAYER[A-C]_MODULATION -------------------------------- - -Used only on ISDB. - -The modulation used by a given ISDB Layer, as defined by -:c:type:`fe_modulation`. - -Possible values are: ``QAM_AUTO``, ``QPSK``, ``QAM_16``, ``QAM_64``, ``DQPSK`` - -.. note:: - - #. If layer C is ``DQPSK``, then layer B has to be ``DQPSK``. - - #. If layer B is ``DQPSK`` and ``DTV_ISDBT_PARTIAL_RECEPTION``\ = 0, - then layer has to be ``DQPSK``. - - -.. _DTV-ISDBT-LAYER-SEGMENT-COUNT: - -DTV_ISDBT_LAYER[A-C]_SEGMENT_COUNT ----------------------------------- - -Used only on ISDB. - -Possible values: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, -1 (AUTO) - -Note: Truth table for ``DTV_ISDBT_SOUND_BROADCASTING`` and -``DTV_ISDBT_PARTIAL_RECEPTION`` and ``LAYER[A-C]_SEGMENT_COUNT`` - -.. _isdbt-layer_seg-cnt-table: - -.. flat-table:: Truth table for ISDB-T Sound Broadcasting - :header-rows: 1 - :stub-columns: 0 - - - - .. row 1 - - - Partial Reception - - - Sound Broadcasting - - - Layer A width - - - Layer B width - - - Layer C width - - - total width - - - .. row 2 - - - 0 - - - 0 - - - 1 .. 13 - - - 1 .. 13 - - - 1 .. 13 - - - 13 - - - .. row 3 - - - 1 - - - 0 - - - 1 - - - 1 .. 13 - - - 1 .. 13 - - - 13 - - - .. row 4 - - - 0 - - - 1 - - - 1 - - - 0 - - - 0 - - - 1 - - - .. row 5 - - - 1 - - - 1 - - - 1 - - - 2 - - - 0 - - - 13 - - - -.. _DTV-ISDBT-LAYER-TIME-INTERLEAVING: - -DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING --------------------------------------- - -Used only on ISDB. - -Valid values: 0, 1, 2, 4, -1 (AUTO) - -when DTV_ISDBT_SOUND_BROADCASTING is active, value 8 is also valid. - -Note: The real time interleaving length depends on the mode (fft-size). -The values here are referring to what can be found in the -TMCC-structure, as shown in the table below. - - -.. c:type:: isdbt_layer_interleaving_table - -.. flat-table:: ISDB-T time interleaving modes - :header-rows: 1 - :stub-columns: 0 - - - - .. row 1 - - - ``DTV_ISDBT_LAYER[A-C]_TIME_INTERLEAVING`` - - - Mode 1 (2K FFT) - - - Mode 2 (4K FFT) - - - Mode 3 (8K FFT) - - - .. row 2 - - - 0 - - - 0 - - - 0 - - - 0 - - - .. row 3 - - - 1 - - - 4 - - - 2 - - - 1 - - - .. row 4 - - - 2 - - - 8 - - - 4 - - - 2 - - - .. row 5 - - - 4 - - - 16 - - - 8 - - - 4 - - - -.. _DTV-ATSCMH-FIC-VER: - -DTV_ATSCMH_FIC_VER ------------------- - -Used only on ATSC-MH. - -Version number of the FIC (Fast Information Channel) signaling data. - -FIC is used for relaying information to allow rapid service acquisition -by the receiver. - -Possible values: 0, 1, 2, 3, ..., 30, 31 - - -.. _DTV-ATSCMH-PARADE-ID: - -DTV_ATSCMH_PARADE_ID --------------------- - -Used only on ATSC-MH. - -Parade identification number - -A parade is a collection of up to eight MH groups, conveying one or two -ensembles. - -Possible values: 0, 1, 2, 3, ..., 126, 127 - - -.. _DTV-ATSCMH-NOG: - -DTV_ATSCMH_NOG --------------- - -Used only on ATSC-MH. - -Number of MH groups per MH subframe for a designated parade. - -Possible values: 1, 2, 3, 4, 5, 6, 7, 8 - - -.. _DTV-ATSCMH-TNOG: - -DTV_ATSCMH_TNOG ---------------- - -Used only on ATSC-MH. - -Total number of MH groups including all MH groups belonging to all MH -parades in one MH subframe. - -Possible values: 0, 1, 2, 3, ..., 30, 31 - - -.. _DTV-ATSCMH-SGN: - -DTV_ATSCMH_SGN --------------- - -Used only on ATSC-MH. - -Start group number. - -Possible values: 0, 1, 2, 3, ..., 14, 15 - - -.. _DTV-ATSCMH-PRC: - -DTV_ATSCMH_PRC --------------- - -Used only on ATSC-MH. - -Parade repetition cycle. - -Possible values: 1, 2, 3, 4, 5, 6, 7, 8 - - -.. _DTV-ATSCMH-RS-FRAME-MODE: - -DTV_ATSCMH_RS_FRAME_MODE ------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) frame mode. - -The acceptable values are defined by :c:type:`atscmh_rs_frame_mode`. - - -.. _DTV-ATSCMH-RS-FRAME-ENSEMBLE: - -DTV_ATSCMH_RS_FRAME_ENSEMBLE ----------------------------- - -Used only on ATSC-MH. - -Reed Solomon(RS) frame ensemble. - -The acceptable values are defined by :c:type:`atscmh_rs_frame_ensemble`. - - -.. _DTV-ATSCMH-RS-CODE-MODE-PRI: - -DTV_ATSCMH_RS_CODE_MODE_PRI ---------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) code mode (primary). - -The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. - - -.. _DTV-ATSCMH-RS-CODE-MODE-SEC: - -DTV_ATSCMH_RS_CODE_MODE_SEC ---------------------------- - -Used only on ATSC-MH. - -Reed Solomon (RS) code mode (secondary). - -The acceptable values are defined by :c:type:`atscmh_rs_code_mode`. - - -.. _DTV-ATSCMH-SCCC-BLOCK-MODE: - -DTV_ATSCMH_SCCC_BLOCK_MODE --------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Block Mode. - -The acceptable values are defined by :c:type:`atscmh_sccc_block_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-A: - -DTV_ATSCMH_SCCC_CODE_MODE_A ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -The acceptable values are defined by :c:type:`atscmh_sccc_code_mode`. - -.. _DTV-ATSCMH-SCCC-CODE-MODE-B: - -DTV_ATSCMH_SCCC_CODE_MODE_B ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-C: - -DTV_ATSCMH_SCCC_CODE_MODE_C ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-ATSCMH-SCCC-CODE-MODE-D: - -DTV_ATSCMH_SCCC_CODE_MODE_D ---------------------------- - -Used only on ATSC-MH. - -Series Concatenated Convolutional Code Rate. - -Possible values are the same as documented on enum -:c:type:`atscmh_sccc_code_mode`. - - -.. _DTV-API-VERSION: - -DTV_API_VERSION -=============== - -Returns the major/minor version of the Digital TV API - - -.. _DTV-CODE-RATE-HP: - -DTV_CODE_RATE_HP -================ - -Used on terrestrial transmissions. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - - -.. _DTV-CODE-RATE-LP: - -DTV_CODE_RATE_LP -================ - -Used on terrestrial transmissions. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - - -.. _DTV-GUARD-INTERVAL: - -DTV_GUARD_INTERVAL -================== - -The acceptable values are defined by :c:type:`fe_guard_interval`. - -.. note:: - - #. If ``DTV_GUARD_INTERVAL`` is set the ``GUARD_INTERVAL_AUTO`` the - hardware will try to find the correct guard interval (if capable) and - will use TMCC to fill in the missing parameters. - #. Intervals ``GUARD_INTERVAL_1_128``, ``GUARD_INTERVAL_19_128`` - and ``GUARD_INTERVAL_19_256`` are used only for DVB-T2 at - present. - #. Intervals ``GUARD_INTERVAL_PN420``, ``GUARD_INTERVAL_PN595`` and - ``GUARD_INTERVAL_PN945`` are used only for DMTB at the present. - On such standard, only those intervals and ``GUARD_INTERVAL_AUTO`` - are valid. - -.. _DTV-TRANSMISSION-MODE: - -DTV_TRANSMISSION_MODE -===================== - - -Used only on OFTM-based standards, e. g. DVB-T/T2, ISDB-T, DTMB. - -Specifies the FFT size (with corresponds to the approximate number of -carriers) used by the standard. - -The acceptable values are defined by :c:type:`fe_transmit_mode`. - -.. note:: - - #. ISDB-T supports three carrier/symbol-size: 8K, 4K, 2K. It is called - **mode** on such standard, and are numbered from 1 to 3: - - ==== ======== ======================== - Mode FFT size Transmission mode - ==== ======== ======================== - 1 2K ``TRANSMISSION_MODE_2K`` - 2 4K ``TRANSMISSION_MODE_4K`` - 3 8K ``TRANSMISSION_MODE_8K`` - ==== ======== ======================== - - #. If ``DTV_TRANSMISSION_MODE`` is set the ``TRANSMISSION_MODE_AUTO`` - the hardware will try to find the correct FFT-size (if capable) and - will use TMCC to fill in the missing parameters. - - #. DVB-T specifies 2K and 8K as valid sizes. - - #. DVB-T2 specifies 1K, 2K, 4K, 8K, 16K and 32K. - - #. DTMB specifies C1 and C3780. - - -.. _DTV-HIERARCHY: - -DTV_HIERARCHY -============= - -Used only on DVB-T and DVB-T2. - -Frontend hierarchy. - -The acceptable values are defined by :c:type:`fe_hierarchy`. - - -.. _DTV-STREAM-ID: - -DTV_STREAM_ID -============= - -Used on DVB-S2, DVB-T2 and ISDB-S. - -DVB-S2, DVB-T2 and ISDB-S support the transmission of several streams on -a single transport stream. This property enables the digital TV driver to -handle substream filtering, when supported by the hardware. By default, -substream filtering is disabled. - -For DVB-S2 and DVB-T2, the valid substream id range is from 0 to 255. - -For ISDB, the valid substream id range is from 1 to 65535. - -To disable it, you should use the special macro NO_STREAM_ID_FILTER. - -Note: any value outside the id range also disables filtering. - - -.. _DTV-DVBT2-PLP-ID-LEGACY: - -DTV_DVBT2_PLP_ID_LEGACY -======================= - -Obsolete, replaced with DTV_STREAM_ID. - - -.. _DTV-ENUM-DELSYS: - -DTV_ENUM_DELSYS -=============== - -A Multi standard frontend needs to advertise the delivery systems -provided. Applications need to enumerate the provided delivery systems, -before using any other operation with the frontend. Prior to it's -introduction, FE_GET_INFO was used to determine a frontend type. A -frontend which provides more than a single delivery system, -FE_GET_INFO doesn't help much. Applications which intends to use a -multistandard frontend must enumerate the delivery systems associated -with it, rather than trying to use FE_GET_INFO. In the case of a -legacy frontend, the result is just the same as with FE_GET_INFO, but -in a more structured format - -The acceptable values are defined by :c:type:`fe_delivery_system`. - - -.. _DTV-INTERLEAVING: - -DTV_INTERLEAVING -================ - -Time interleaving to be used. - -The acceptable values are defined by :c:type:`fe_interleaving`. - - -.. _DTV-LNA: - -DTV_LNA -======= - -Low-noise amplifier. - -Hardware might offer controllable LNA which can be set manually using -that parameter. Usually LNA could be found only from terrestrial devices -if at all. - -Possible values: 0, 1, LNA_AUTO - -0, LNA off - -1, LNA on - -use the special macro LNA_AUTO to set LNA auto - - -.. _DTV-SCRAMBLING-SEQUENCE-INDEX: - -DTV_SCRAMBLING_SEQUENCE_INDEX -============================= - -Used on DVB-S2. - -This 18 bit field, when present, carries the index of the DVB-S2 physical -layer scrambling sequence as defined in clause 5.5.4 of EN 302 307. -There is no explicit signalling method to convey scrambling sequence index -to the receiver. If S2 satellite delivery system descriptor is available -it can be used to read the scrambling sequence index (EN 300 468 table 41). - -By default, gold scrambling sequence index 0 is used. - -The valid scrambling sequence index range is from 0 to 262142. |