Hi Shengjiu,
Some small comments below:
On 22/11/2023 08:23, Shengjiu Wang wrote:
> Add V4L2_CID_M2M_AUDIO_SOURCE_RATE and V4L2_CID_M2M_AUDIO_DEST_RATE
> new IDs for rate control.
>
> Add V4L2_CID_M2M_AUDIO_SOURCE_RATE_OFFSET and
> V4L2_CID_M2M_AUDIO_DEST_RATE_OFFSET for clock drift.
>
> Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx>
> ---
> .../media/v4l/ext-ctrls-audio-m2m.rst | 20 +++++++++++++++++++
> drivers/media/v4l2-core/v4l2-ctrls-defs.c | 6 ++++++
> include/uapi/linux/v4l2-controls.h | 5 +++++
> 3 files changed, 31 insertions(+)
>
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> index 82d2ecedbfee..a3c06fbb91b9 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-audio-m2m.rst
> @@ -19,3 +19,23 @@ Audio M2M Control IDs
> The Audio M2M class descriptor. Calling
> :ref:`VIDIOC_QUERYCTRL` for this control will
> return a description of this control class.
> +
> +.. _v4l2-audio-asrc:
> +
> +``V4L2_CID_M2M_AUDIO_SOURCE_RATE (integer menu)``
> + Sets the audio source sample rate, unit is Hz
> +
> +``V4L2_CID_M2M_AUDIO_DEST_RATE (integer menu)``
> + Sets the audio destination sample rate, unit is Hz
> +
> +``V4L2_CID_M2M_AUDIO_SOURCE_RATE_OFFSET (fixed point)``
> + Sets the offset from the audio source sample rate, unit is Hz.
> + The offset compensates for any clock drift. The actual source audio sample
> + rate is the ideal source audio sample rate from
> + ``V4L2_CID_M2M_AUDIO_SOURCE_RATE`` plus this fixed point offset.
> +
> +``V4L2_CID_M2M_AUDIO_DEST_RATE_OFFSET (fixed point)``
> + Sets the offset from the audio dest sample rate, unit is Hz.
dest -> destination
> + The offset compensates for any clock drift. The actual dest audio sample
Ditto.
> + rate is the ideal source audio sample rate from
> + ``V4L2_CID_M2M_AUDIO_DEST_RATE`` plus this fixed point offset.
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls-defs.c b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> index 2a85ea3dc92f..4e606d7fd971 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls-defs.c
> @@ -1245,6 +1245,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>
> /* Audio M2M controls */
> case V4L2_CID_M2M_AUDIO_CLASS: return "Audio M2M Controls";
> + case V4L2_CID_M2M_AUDIO_SOURCE_RATE: return "Audio Source Sample Rate";
> + case V4L2_CID_M2M_AUDIO_DEST_RATE: return "Audio Dest Sample Rate";
Dest -> Destination
> default:
> return NULL;
> }
> @@ -1606,6 +1608,10 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY:
> *type = V4L2_CTRL_TYPE_HDR10_MASTERING_DISPLAY;
> break;
> + case V4L2_CID_M2M_AUDIO_SOURCE_RATE:
> + case V4L2_CID_M2M_AUDIO_DEST_RATE:
> + *type = V4L2_CTRL_TYPE_INTEGER_MENU;
> + break;
> default:
> *type = V4L2_CTRL_TYPE_INTEGER;
> break;
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 7d318065a33d..493b59f20a35 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -3489,6 +3489,11 @@ struct v4l2_ctrl_av1_film_grain {
> #define V4L2_CID_M2M_AUDIO_CLASS_BASE (V4L2_CTRL_CLASS_M2M_AUDIO | 0x900)
> #define V4L2_CID_M2M_AUDIO_CLASS (V4L2_CTRL_CLASS_M2M_AUDIO | 1)
>
> +#define V4L2_CID_M2M_AUDIO_SOURCE_RATE (V4L2_CID_M2M_AUDIO_CLASS_BASE + 0)
> +#define V4L2_CID_M2M_AUDIO_DEST_RATE (V4L2_CID_M2M_AUDIO_CLASS_BASE + 1)
> +#define V4L2_CID_M2M_AUDIO_SOURCE_RATE_OFFSET (V4L2_CID_M2M_AUDIO_CLASS_BASE + 2)
> +#define V4L2_CID_M2M_AUDIO_DEST_RATE_OFFSET (V4L2_CID_M2M_AUDIO_CLASS_BASE + 3)
> +
> /* MPEG-compression definitions kept for backwards compatibility */
> #ifndef __KERNEL__
> #define V4L2_CTRL_CLASS_MPEG V4L2_CTRL_CLASS_CODEC
Regards,
Hans
