From 6cb77a85aaf317e0b6e513f70eca6ebe34f9cdf0 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Tue, 7 Jun 2011 17:58:59 -0300 Subject: [PATCH] [media] DocBook/frontend.xml: add references for some missing info The frontend.h.xml now references to the main document. However, several references are missed. Links the trivial ones with the corresponding API descriptions. While here, updates the main API to reflect the API improvements. Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media/Makefile | 2 +- Documentation/DocBook/media/dvb/frontend.xml | 204 ++++++++++++------- 2 files changed, 131 insertions(+), 75 deletions(-) diff --git a/Documentation/DocBook/media/Makefile b/Documentation/DocBook/media/Makefile index 30360709ace..f2216b05b2d 100644 --- a/Documentation/DocBook/media/Makefile +++ b/Documentation/DocBook/media/Makefile @@ -120,13 +120,13 @@ DOCUMENTED = \ -e "s/v4l2\-mpeg\-vbi\-ITV0/v4l2-mpeg-vbi-itv0-1/g" DVB_DOCUMENTED = \ - -e "s,\(define\s\+\)\([A-Z0-9_]\+\)\(\s\+_IO\),\1\\2\<\/link\>\3,g" \ -e "s/\(linkend\=\"\)FE_SET_PROPERTY/\1FE_GET_PROPERTY/g" \ -e "s,\(struct\s\+\)\([a-z0-9_]\+\)\(\s\+{\),\1\\2\<\/link\>\3,g" \ -e "s,\(}\s\+\)\([a-z0-9_]\+_t\+\),\1\\2\<\/link\>,g" \ -e "s,\(define\s\+\)\(DTV_[A-Z0-9_]\+\)\(\s\+[0-9]\+\),\1\\2\<\/link\>\3,g" \ -e ":a;s/\(linkend=\".*\)_\(.*\">\)/\1-\2/;ta" \ -e "s,DTV-ISDBT-LAYER[A-C],DTV-ISDBT-LAYER,g" \ + -e "s,\(define\s\+\)\([A-Z0-9_]\+\)\(\s\+_IO\),\1\\2\<\/link\>\3,g" \ # -e "s,\(\s\+\)\(FE_[A-Z0-9_]\+\)\([\s\=\,]*\),\1\\2\<\/link\>\3,g" \ # diff --git a/Documentation/DocBook/media/dvb/frontend.xml b/Documentation/DocBook/media/dvb/frontend.xml index 65a790e196b..a925b4507ce 100644 --- a/Documentation/DocBook/media/dvb/frontend.xml +++ b/Documentation/DocBook/media/dvb/frontend.xml @@ -65,7 +65,7 @@ supported via the new FE_GET_PROPERTY/FE_GET -
+
frontend capabilities Capabilities describe what a frontend can do. Some capabilities can only be supported for @@ -106,7 +106,7 @@ a specific frontend type.
-
+
frontend information Information about the frontend ca be queried with @@ -129,7 +129,7 @@ a specific frontend type.
-
+
diseqc master command A message sent from the frontend to DiSEqC capable equipment. @@ -153,7 +153,7 @@ a specific frontend type.
-
+
diseqc slave reply 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 @@ -166,7 +166,7 @@ consistently to the DiSEqC commands as described in the DiSEqC spec.
-
+
SEC continuous tone The continuous 22KHz tone is usually used with non-DiSEqC capable LNBs to switch the @@ -181,7 +181,7 @@ spec.
-
+
SEC tone burst The 22KHz tone burst is usually used with non-DiSEqC capable switches to select @@ -198,7 +198,7 @@ spec.
-
+
frontend status Several functions of the frontend device use the fe_status data type defined by @@ -218,31 +218,42 @@ by
-
+
frontend parameters The kind of parameters passed to the frontend device for tuning depend on the kind of hardware you are using. All kinds of parameters are combined as an union in the FrontendParameters structure: - struct dvb_frontend_parameters { - uint32_t frequency; /⋆ (absolute) frequency in Hz for QAM/OFDM ⋆/ - /⋆ intermediate frequency in kHz for QPSK ⋆/ - fe_spectral_inversion_t inversion; - union { - struct dvb_qpsk_parameters qpsk; - struct dvb_qam_parameters qam; - struct dvb_ofdm_parameters ofdm; - } u; - }; +struct dvb_frontend_parameters { + uint32_t frequency; /⋆ (absolute) frequency in Hz for QAM/OFDM ⋆/ + /⋆ intermediate frequency in kHz for QPSK ⋆/ + fe_spectral_inversion_t inversion; + union { + struct dvb_qpsk_parameters qpsk; + struct dvb_qam_parameters qam; + struct dvb_ofdm_parameters ofdm; + struct dvb_vsb_parameters vsb; + } u; +}; -For satellite QPSK frontends you have to use the QPSKParameters member defined by +In the case of QPSK frontends the frequency field specifies the intermediate +frequency, i.e. the offset which is effectively added to the local oscillator frequency (LOF) of +the LNB. The intermediate frequency has to be specified in units of kHz. For QAM and +OFDM frontends the frequency specifies the absolute frequency and is given in Hz. + +
+QPSK parameters +For satellite QPSK frontends you have to use the dvb_qpsk_parameters structure: struct dvb_qpsk_parameters { uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ fe_code_rate_t fec_inner; /⋆ forward error correction (see above) ⋆/ }; -for cable QAM frontend you use the QAMParameters structure +
+
+QAM parameters +for cable QAM frontend you use the dvb_qam_parameters structure: struct dvb_qam_parameters { uint32_t symbol_rate; /⋆ symbol rate in Symbols per second ⋆/ @@ -250,8 +261,10 @@ union in the FrontendParameters structure: fe_modulation_t modulation; /⋆ modulation type (see above) ⋆/ }; -DVB-T frontends are supported by the OFDMParamters structure - +
+
+OFDM parameters +DVB-T frontends are supported by the dvb_ofdm_parameters structure: struct dvb_ofdm_parameters { fe_bandwidth_t bandwidth; @@ -263,86 +276,128 @@ union in the FrontendParameters structure: fe_hierarchy_t hierarchy_information; }; -In the case of QPSK frontends the Frequency field specifies the intermediate -frequency, i.e. the offset which is effectively added to the local oscillator frequency (LOF) of -the LNB. The intermediate frequency has to be specified in units of kHz. For QAM and -OFDM frontends the Frequency specifies the absolute frequency and is given in -Hz. - +
+
+VSB parameters +DVB-T frontends are supported by the dvb_vsb_parameters structure: + +struct dvb_vsb_parameters { + fe_modulation_t modulation; /⋆ modulation type (see above) ⋆/ +}; + +
+
+frontend spectral inversion The Inversion field can take one of these values: - typedef enum fe_spectral_inversion { - INVERSION_OFF, - INVERSION_ON, - INVERSION_AUTO - } fe_spectral_inversion_t; +typedef enum fe_spectral_inversion { + INVERSION_OFF, + INVERSION_ON, + INVERSION_AUTO +} fe_spectral_inversion_t; It indicates if spectral inversion should be presumed or not. In the automatic setting (INVERSION_AUTO) the hardware will try to figure out the correct setting by itself. +
+
+frontend code rate The possible values for the FEC_inner field are - typedef enum fe_code_rate { - FEC_NONE = 0, - FEC_1_2, - FEC_2_3, - FEC_3_4, - FEC_4_5, - FEC_5_6, - FEC_6_7, - FEC_7_8, - FEC_8_9, - FEC_AUTO - } fe_code_rate_t; +typedef enum fe_code_rate { + FEC_NONE = 0, + FEC_1_2, + FEC_2_3, + FEC_3_4, + FEC_4_5, + FEC_5_6, + FEC_6_7, + FEC_7_8, + FEC_8_9, + FEC_AUTO, + FEC_3_5, + FEC_9_10, +} fe_code_rate_t; which correspond to error correction rates of 1/2, 2/3, etc., no error correction or auto detection. +
+
+frontend modulation type for QAM and OFDM For cable and terrestrial frontends (QAM and OFDM) one also has to specify the quadrature modulation mode which can be one of the following: typedef enum fe_modulation { - QPSK, - QAM_16, - QAM_32, - QAM_64, - QAM_128, - QAM_256, - QAM_AUTO + QPSK, + QAM_16, + QAM_32, + QAM_64, + QAM_128, + QAM_256, + QAM_AUTO, + VSB_8, + VSB_16, + PSK_8, + APSK_16, + APSK_32, + DQPSK, } fe_modulation_t; +
Finally, there are several more parameters for OFDM: +
+Number of carriers per channel, on OFTM modulation - typedef enum fe_transmit_mode { - TRANSMISSION_MODE_2K, - TRANSMISSION_MODE_8K, - TRANSMISSION_MODE_AUTO +typedef enum fe_transmit_mode { + TRANSMISSION_MODE_2K, + TRANSMISSION_MODE_8K, + TRANSMISSION_MODE_AUTO, + TRANSMISSION_MODE_4K, + TRANSMISSION_MODE_1K, + TRANSMISSION_MODE_16K, + TRANSMISSION_MODE_32K, } fe_transmit_mode_t; - - typedef enum fe_bandwidth { - BANDWIDTH_8_MHZ, - BANDWIDTH_7_MHZ, - BANDWIDTH_6_MHZ, - BANDWIDTH_AUTO - } fe_bandwidth_t; +
+
+frontend bandwidth + +typedef enum fe_bandwidth { + BANDWIDTH_8_MHZ, + BANDWIDTH_7_MHZ, + BANDWIDTH_6_MHZ, + BANDWIDTH_AUTO, + BANDWIDTH_5_MHZ, + BANDWIDTH_10_MHZ, + BANDWIDTH_1_712_MHZ, +} fe_bandwidth_t; - - typedef enum fe_guard_interval { - GUARD_INTERVAL_1_32, - GUARD_INTERVAL_1_16, - GUARD_INTERVAL_1_8, - GUARD_INTERVAL_1_4, - GUARD_INTERVAL_AUTO - } fe_guard_interval_t; +
+
+frontend guard inverval + +typedef enum fe_guard_interval { + GUARD_INTERVAL_1_32, + GUARD_INTERVAL_1_16, + GUARD_INTERVAL_1_8, + GUARD_INTERVAL_1_4, + GUARD_INTERVAL_AUTO, + GUARD_INTERVAL_1_128, + GUARD_INTERVAL_19_128, + GUARD_INTERVAL_19_256, +} fe_guard_interval_t; - - typedef enum fe_hierarchy { +
+
+frontend hierarchy + +typedef enum fe_hierarchy { HIERARCHY_NONE, HIERARCHY_1, HIERARCHY_2, @@ -350,10 +405,11 @@ modulation mode which can be one of the following: HIERARCHY_AUTO } fe_hierarchy_t; +
-
+
frontend events struct dvb_frontend_event { -- 2.41.0