media/v4l/ext-ctrls-fm-tx.rst

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _fm-tx-controls:
15 .. _fm-tx-control-id:
25 ``V4L2_CID_RDS_TX_DEVIATION (integer)``
27     step are driver-specific.
29 ``V4L2_CID_RDS_TX_PI (integer)``
32 ``V4L2_CID_RDS_TX_PTY (integer)``
34     to 31 pre-defined programme types.
44     which can scroll strings sized as 8 x N characters. So, this control
52     programme-related information or any other text. In these cases,
58     which can scroll strings sized as 32 x N or 64 x N characters. So,
103     receiver-generated distortion and prevent overmodulation.
105 ``V4L2_CID_AUDIO_LIMITER_RELEASE_TIME (integer)``
107     useconds. Step and range are driver-specific.
109 ``V4L2_CID_AUDIO_LIMITER_DEVIATION (integer)``
111     are driver-specific.
119 ``V4L2_CID_AUDIO_COMPRESSION_GAIN (integer)``
121     range and step are driver-specific.
123 ``V4L2_CID_AUDIO_COMPRESSION_THRESHOLD (integer)``
125     value. The range and step are driver-specific.
127 ``V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME (integer)``
129     value. The range and step are driver-specific.
131 ``V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME (integer)``
133     useconds value. The range and step are driver-specific.
138 ``V4L2_CID_PILOT_TONE_DEVIATION (integer)``
140     range and step are driver-specific.
142 ``V4L2_CID_PILOT_TONE_FREQUENCY (integer)``
144     step are driver-specific.
149 enum v4l2_preemphasis -
150     Configures the pre-emphasis value for broadcasting. A pre-emphasis
154     values for pre-emphasis. Here they are:
158 .. flat-table::
159     :header-rows:  0
160     :stub-columns: 0
162     * - ``V4L2_PREEMPHASIS_DISABLED``
163       - No pre-emphasis is applied.
164     * - ``V4L2_PREEMPHASIS_50_uS``
165       - A pre-emphasis of 50 uS is used.
166     * - ``V4L2_PREEMPHASIS_75_uS``
167       - A pre-emphasis of 75 uS is used.
171 ``V4L2_CID_TUNE_POWER_LEVEL (integer)``
173     dBuV. Range and step are driver-specific.
175 ``V4L2_CID_TUNE_ANTENNA_CAPACITOR (integer)``
178     driver-specific.