12.16. VO¶
【Debug Information】
# cat /proc/cvitek/vo
-------------------------------DEVICE CONFIG------------------------------
DevID DevEn IntfType IntfSync BkClr DevFrt
# 0 Y MIPI 720x1280@60 3FF 106
-------------------------------VIDEO LAYER STATUS 1-----------------------
LayerId VideoEn PixFmt ImgW ImgH DispX DispY DispW DispH DispFrt
# 0 Y YUV_PLANAR_420 720 1280 0 0 720 1280 25
-------------------------------VIDEO LAYER STATUS 2 (continue)------------
LayerId DevId EnChNum Luma Cont Hue Satu BufLen
# 0 0 1 128 128 0 128 3
-------------------------------CHN BASIC INFO-----------------------------
LayerId ChnId ChnEn Prio ChnX ChnY ChnW ChnH RotAngle
# 0 # 0 Y 0 0 0 720 1280 90
-------------------------------CHN PLAY INFO------------------------------
LayerId ChnId Show Pause Thrshd ChnFrt ChnGap(us) DispPts PreDonePts
# 0 # 0 N N 3 24 41666 1580552617 1580472618
【Analysis】
Record the current VO usage status and attribute configuration, including device status, video layer status and channel status. It can be used to dynamically obtain the current VO usage status for debugging or testing.
【Parameter Description】
Parameter |
Decription |
|
|---|---|---|
DEVICE CONFIG |
DevID |
Device ID。 Value range: [0, VO_MAX_DEV_NUM） |
DevEn |
Whether the device is enabled. N: Prohibition; Y: Enable. |
|
IntfType |
Interface type. Value range: CVBS, YPBPR, VGA, BT656, BT1120, LCD, LCD_18BIT, LCD_24BIT, LCD_30BIT, MIPI, MIPI_SLAVE, HDMI, I80 |
|
IntfSync |
Interface timing. Value range: [0, VO_OUTPUT_BUTT）。 |
|
BkClr |
Background color of the device. Hex RGB888 format. |
|
DevFrt |
Device frame rate, or refresh rate, is related to timing. |
|
VIDEO LAYER STATUS 1 |
LayerId |
Video layer ID. Value range: [0, VO_MAX_LAYER_NUM）。 |
VideoEn |
Whether the video layer is enabled. N: Prohibition; Y: Enable. |
|
PixFmt |
Enter the pixel format of the image. |
|
ImgW |
The width of the video layer canvas. |
|
ImgH |
The height of the video layer canvas. |
|
DispX |
The starting abscissa of the display area. |
|
DispY |
The starting ordinate of the display area. |
|
DispW |
The width of the display area. |
|
DispH |
The height of the display area. |
|
DispFrt |
The display frame rate of the video layer. |
|
VIDEO LAYER STATUS 2(continue) |
LayerId |
Video layer ID. Value range: [0, VO_MAX_LAYER_NUM）。 |
DevId |
The device ID of the video layer binding. Value range: [0, VO_MAX_DEV_NUM）。 |
|
EnChNum |
Channel enable count. That is, how many channels in the video layer are enabled. Value range: [0, VO_MAX_CHN_NUM）。 |
|
Luma |
Brightness. Value range: [0, 100]。 |
|
Cont |
Contrast. Value range: [0, 100]。 |
|
Hue |
Hue. Value range: [0, 100]。 |
|
Satu |
Saturation. Value range: [0, 100]。 |
|
BufLen |
Displays the buffer length. |
|
CHN BASIC INFO |
LayerId |
Video layer ID. Value range: [0, VO_MAX_LAYER_NUM）。 |
ChnId |
Channel ID. Value range: [0, VO_MAX_CHN_NUM）。 |
|
ChnEn |
Whether the channel is enabled. Y: Yes; N: No. |
|
Prio |
Channel priority. Value range: [0, VO_MAX_CHN_NUM）。 |
|
ChnX |
The starting abscissa of the channel. |
|
ChnY |
The initial ordinate of the channel. |
|
ChnW |
Channel width. |
|
ChnH |
Channel height. |
|
RotAngle |
Channel rotation angle. Value range: [0,ROTATION_BUTT) |
|
CHN PLAY INFO |
LayerId |
Video layer ID. Value range: [0, VO_MAX_LAYER_NUM）。 |
ChnId |
Channel ID. Value range: [0, VO_MAX_CHN_NUM）。 |
|
Show |
Whether the channel is displayed. N: Not displayed; Y: Display. |
|
Pause |
Whether the channel is suspended. N: Prohibition; Y: Enable. |
|
Thrshd |
The maximum number of image frames that the channel buffer queue can receive. |
|
ChnFrt |
Channel frame rate. Channel playback control can be reflected by this value. |
|
ChnGap(us) |
Channel frame spacing. Inversely proportional to the channel frame rate. Unit: us。 |
|
DispPts |
The timestamp of the frame currently being displayed. Unit: us。 |
|
PreDonePts |
The timestamp of the previous completed display frame. Unit: us。 |