diff options
Diffstat (limited to 'Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst')
| -rw-r--r-- | Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst | 21 |
1 files changed, 7 insertions, 14 deletions
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst index 04c997c9a4c3..cb40cf4cc3ec 100644 --- a/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-fm-tx.rst @@ -104,7 +104,7 @@ FM_TX Control IDs ``V4L2_CID_AUDIO_LIMITER_RELEASE_TIME (integer)`` Sets the audio deviation limiter feature release time. Unit is in - useconds. Step and range are driver-specific. + microseconds. Step and range are driver-specific. ``V4L2_CID_AUDIO_LIMITER_DEVIATION (integer)`` Configures audio frequency deviation level in Hz. The range and step @@ -121,16 +121,16 @@ FM_TX Control IDs range and step are driver-specific. ``V4L2_CID_AUDIO_COMPRESSION_THRESHOLD (integer)`` - Sets the threshold level for audio compression freature. It is a dB + Sets the threshold level for audio compression feature. It is a dB value. The range and step are driver-specific. ``V4L2_CID_AUDIO_COMPRESSION_ATTACK_TIME (integer)`` - Sets the attack time for audio compression feature. It is a useconds + Sets the attack time for audio compression feature. It is a microseconds value. The range and step are driver-specific. ``V4L2_CID_AUDIO_COMPRESSION_RELEASE_TIME (integer)`` Sets the release time for audio compression feature. It is a - useconds value. The range and step are driver-specific. + microseconds value. The range and step are driver-specific. ``V4L2_CID_PILOT_TONE_ENABLED (boolean)`` Enables or disables the pilot tone generation feature. @@ -143,17 +143,12 @@ FM_TX Control IDs Configures pilot tone frequency value. Unit is in Hz. The range and step are driver-specific. -``V4L2_CID_TUNE_PREEMPHASIS`` - (enum) - -enum v4l2_preemphasis - +``V4L2_CID_TUNE_PREEMPHASIS (enum)`` Configures the pre-emphasis value for broadcasting. A pre-emphasis filter is applied to the broadcast to accentuate the high audio frequencies. Depending on the region, a time constant of either 50 - or 75 useconds is used. The enum v4l2_preemphasis defines possible - values for pre-emphasis. Here they are: - - + or 75 microseconds is used. The enum v4l2_preemphasis defines possible + values for pre-emphasis. They are: .. flat-table:: :header-rows: 0 @@ -166,8 +161,6 @@ enum v4l2_preemphasis - * - ``V4L2_PREEMPHASIS_75_uS`` - A pre-emphasis of 75 uS is used. - - ``V4L2_CID_TUNE_POWER_LEVEL (integer)`` Sets the output power level for signal transmission. Unit is in dBuV. Range and step are driver-specific. |