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[media] DocBook: improve documentation for FEC fields

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Format it as a table and add more details. Also, remove the
duplicated occurrences.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2015-05-28 21:38:44 -03:00
parent b174fb71e8
commit 2d457b8a90
4 changed files with 78 additions and 87 deletions
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123
Documentation/DocBook/media/dvb/dvbproperty.xml
View File

@ -290,25 +290,70 @@ get/set up to 64 properties. The actual meaning of each property is described on
<title><constant>DTV_INNER_FEC</constant></title>
<para>Used cable/satellite transmissions. The acceptable values are:
</para>
<programlisting>
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,
FEC_2_5,
} fe_code_rate_t;
</programlisting>
<para>which correspond to error correction rates of 1/2, 2/3, etc.,
no error correction or auto detection.</para>
<section id="fe-code-rate-t">
<title>enum fe_code_rate: type of the Forward Error Correction.</title>
<table pgwide="1" frame="none" id="fe-code-rate">
<title>enum fe_code_rate</title>
<tgroup cols="2">
&cs-def;
<thead>
<row>
<entry>ID</entry>
<entry>Description</entry>
</row>
</thead>
<tbody valign="top">
<row>
<entry>TRANSMISSION_MODE_AUTO</entry>
<entry>Autodetect transmission mode. The hardware will try to find
the correct FFT-size (if capable) to fill in the missing
parameters.</entry>
</row><row>
<entry>FEC_NONE</entry>
<entry>No Forward Error Correction Code</entry>
</row><row>
<entry>FEC_AUTO</entry>
<entry>Autodetect Error Correction Code</entry>
</row><row>
<entry>FEC_1_2</entry>
<entry>Forward Error Correction Code 1/2</entry>
</row><row>
<entry>FEC_2_3</entry>
<entry>Forward Error Correction Code 2/3</entry>
</row><row>
<entry>FEC_3_4</entry>
<entry>Forward Error Correction Code 3/4</entry>
</row><row>
<entry>FEC_4_5</entry>
<entry>Forward Error Correction Code 4/5</entry>
</row><row>
<entry>FEC_5_6</entry>
<entry>Forward Error Correction Code 5/6</entry>
</row><row>
<entry>FEC_6_7</entry>
<entry>Forward Error Correction Code 6/7</entry>
</row><row>
<entry>FEC_7_8</entry>
<entry>Forward Error Correction Code 7/8</entry>
</row><row>
<entry>FEC_8_9</entry>
<entry>Forward Error Correction Code 8/9</entry>
</row><row>
<entry>FEC_9_10</entry>
<entry>Forward Error Correction Code 9/10</entry>
</row><row>
<entry>FEC_2_5</entry>
<entry>Forward Error Correction Code 2/5</entry>
</row><row>
<entry>FEC_3_5</entry>
<entry>Forward Error Correction Code 3/5</entry>
</row><row>
</row>
</tbody>
</tgroup>
</table>
</section>
</section>
<section id="DTV-VOLTAGE">
<title><constant>DTV_VOLTAGE</constant></title>
@ -757,46 +802,18 @@ typedef enum atscmh_sccc_code_mode {
</section>
<section id="DTV-CODE-RATE-HP">
<title><constant>DTV_CODE_RATE_HP</constant></title>
<para>Used on terrestrial transmissions. The acceptable values are:
<para>Used on terrestrial transmissions. The acceptable values are
the ones described at &fe-transmit-mode-t;.
</para>
<programlisting>
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;
</programlisting>
</section>
<section id="DTV-CODE-RATE-LP">
<title><constant>DTV_CODE_RATE_LP</constant></title>
<para>Used on terrestrial transmissions. The acceptable values are:
<para>Used on terrestrial transmissions. The acceptable values are
the ones described at &fe-transmit-mode-t;.
</para>
<programlisting>
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;
</programlisting>
</section>
<section id="DTV-GUARD-INTERVAL">
<title><constant>DTV_GUARD_INTERVAL</constant></title>

28
Documentation/DocBook/media/dvb/frontend.xml
View File

@ -56,34 +56,6 @@ specification is available at
&sub-dvbproperty;
<section id="fe-code-rate-t">
<title>frontend code rate</title>
<para>The possible values for the <constant>fec_inner</constant> field used on
<link linkend="dvb-qpsk-parameters"><constant>struct dvb_qpsk_parameters</constant></link> and
<link linkend="dvb-qam-parameters"><constant>struct dvb_qam_parameters</constant></link> are:
</para>
<programlisting>
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;
</programlisting>
<para>which correspond to error correction rates of 1/2, 2/3, etc., no error correction or auto
detection.
</para>
</section>
<section>
<title>More OFDM parameters</title>

8
Documentation/DocBook/media/dvb/frontend_legacy_api.xml
View File

@ -145,7 +145,7 @@ OFDM frontends the <constant>frequency</constant> specifies the absolute frequen
<programlisting>
struct dvb_qpsk_parameters {
uint32_t symbol_rate; /&#x22C6; symbol rate in Symbols per second &#x22C6;/
fe_code_rate_t fec_inner; /&#x22C6; forward error correction (see above) &#x22C6;/
&fe-code-rate-t; fec_inner; /&#x22C6; forward error correction (see above) &#x22C6;/
};
</programlisting>
</section>
@ -156,7 +156,7 @@ OFDM frontends the <constant>frequency</constant> specifies the absolute frequen
<programlisting>
struct dvb_qam_parameters {
uint32_t symbol_rate; /&#x22C6; symbol rate in Symbols per second &#x22C6;/
fe_code_rate_t fec_inner; /&#x22C6; forward error correction (see above) &#x22C6;/
&fe-code-rate-t; fec_inner; /&#x22C6; forward error correction (see above) &#x22C6;/
&fe-modulation-t; modulation; /&#x22C6; modulation type (see above) &#x22C6;/
};
</programlisting>
@ -178,8 +178,8 @@ struct dvb_vsb_parameters {
<programlisting>
struct dvb_ofdm_parameters {
&fe-bandwidth-t; bandwidth;
fe_code_rate_t code_rate_HP; /&#x22C6; high priority stream code rate &#x22C6;/
fe_code_rate_t code_rate_LP; /&#x22C6; low priority stream code rate &#x22C6;/
&fe-code-rate-t; code_rate_HP; /&#x22C6; high priority stream code rate &#x22C6;/
&fe-code-rate-t; code_rate_LP; /&#x22C6; low priority stream code rate &#x22C6;/
&fe-modulation-t; constellation; /&#x22C6; modulation type (see above) &#x22C6;/
&fe-transmit-mode-t; transmission_mode;
fe_guard_interval_t guard_interval;

6
include/uapi/linux/dvb/frontend.h
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@ -162,7 +162,7 @@ enum fe_spectral_inversion {
typedef enum fe_spectral_inversion fe_spectral_inversion_t;
typedef enum fe_code_rate {
enum fe_code_rate {
FEC_NONE = 0,
FEC_1_2,
FEC_2_3,
@ -176,7 +176,9 @@ typedef enum fe_code_rate {
FEC_3_5,
FEC_9_10,
FEC_2_5,
} fe_code_rate_t;
};
typedef enum fe_code_rate fe_code_rate_t;
enum fe_modulation {