Video and Vision Processing Suite Intel® FPGA IP User Guide

ID 683329
Date 9/30/2022
Public

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Document Table of Contents
1. About the Video and Vision Processing Suite 2. Getting Started with the Video and Vision Processing IPs 3. Video and Vision Processing IPs Functional Description 4. Video and Vision Processing IP Interfaces 5. Video and Vision Processing IP Registers 6. Video and Vision Processing IPs Software Programming Model 7. Protocol Converter Intel® FPGA IP 8. 3D LUT Intel® FPGA IP 9. AXI-Stream Broadcaster Intel® FPGA IP 10. Chroma Key Intel® FPGA IP 11. Chroma Resampler Intel® FPGA IP 12. Clipper Intel® FPGA IP 13. Clocked Video Input Intel® FPGA IP 14. Clocked Video to Full-Raster Converter Intel® FPGA IP 15. Clocked Video Output Intel® FPGA IP 16. Color Space Converter Intel® FPGA IP 17. Deinterlacer Intel® FPGA IP 18. FIR Filter Intel® FPGA IP 19. Frame Cleaner Intel® FPGA IP 20. Full-Raster to Clocked Video Converter Intel® FPGA IP 21. Full-Raster to Streaming Converter Intel® FPGA IP 22. Generic Crosspoint Intel® FPGA IP 23. Genlock Signal Router Intel® FPGA IP 24. Guard Bands Intel® FPGA IP 25. Interlacer Intel® FPGA IP 26. Mixer Intel® FPGA IP 27. Pixels in Parallel Converter Intel® FPGA IP 28. Scaler Intel® FPGA IP 29. Stream Cleaner Intel® FPGA IP 30. Switch Intel® FPGA IP 31. Tone Mapping Operator Intel® FPGA IP 32. Test Pattern Generator Intel® FPGA IP 33. Video Frame Buffer Intel® FPGA IP 34. Video Streaming FIFO Intel® FPGA IP 35. Video Timing Generator Intel® FPGA IP 36. Warp Intel® FPGA IP 37. Design Security 38. Document Revision History for Video and Vision Processing Suite User Guide

31.5. TMO IP Software API

The IP includes a software driver that configures and controls all the IP parameters.

Software Driver Example

int main()
{
  int ret = -1;

  /* Initialize datapath Video Timing Generator instance
  /* This API function is not part of the TMO driver. */ 
  /* Hence, it is up to the user to implement it, to provide VIDEO_WIDTH, VIDEO_HEIGHT values */
  datapath_vtiming_config(VTIMING_TMO_BASE, 1);

  /* Initialize TMO IP instance*/
  intel_vvp_base_t base = INTEL_VVP_TMO_BASE;
  intel_vvp_tmo_instance_t intel_vvp_tmo_instance;

  /*Query TMO IP instance, to know whether is has been initialized correctly. */
  /* A value == '0' indicates TMO IP has been initialized correctly  */
  ret = intel_vvp_tmo_init_instance(&intel_vvp_tmo_instance, base);

  if (ret == 0)
  {
    /* TMO IP Bypass control */
    uint32_t bypass = 0;

    intel_vvp_tmo_set_bypass(&intel_vvp_tmo_instance, bypass);
    printf("Intel VVP TMO Bypass %s\n\n", bypass ? "ENABLED" : "DISABLED");

    /* Initialize TMO IP to specific video resolution */
    intel_vvp_tmo_set_resolution(&intel_vvp_tmo_instance, VIDEO_WIDTH, VIDEO_HEIGHT);

    /* Update TMO IP volume control values */
    intel_vvp_tmo_set_volume(&intel_vvp_tmo_instance, VOLUME_CTL_USER);
    intel_vvp_tmo_set_threshold(&intel_vvp_tmo_instance, INT_THR_USER);

    printf("TMO initialization done\n");
    fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);

    while (1)
    {
      /* This function checks if TMO IP bypass mode and/or volume control values need to be updated */
      /* but it is not part of the TMO IP SW driver package. Hence, customers are expected */
      /* to implement their own function according to their specific needs */   
      process_user_input(&intel_vvp_tmo_instance);

      /* This part of the code is for debug purpose only */
      /* Two conditions are checked: */
            
      /* Condition #1: Missing data collection per tile */
      static const uint32_t num_rows = 4;
      static const uint32_t row_mask = ~(~0u << num_rows);

    





      /* Read TMO IP debug register to check for error conditions */
      uint32_t reg_val = intel_vvp_tmo_get_debug(&intel_vvp_tmo_instance;

      if (reg_val & row_mask)
      {
        printf ("Timeout rows: ";

        for (uint32_t i = 0; i < num_rows; ++ i)
        {
          if (reg_val & (0x1 << i))
            printf("%"PRIu32" ", i);
        }

        printf("\n";
      }

      /* Condition #2: Missing entire video frame */
      if (reg_val & 0x100)
      {
        printf ("FSYNC toggle error\n";
      }

      /* Set TMO IP debug register to capture new error conditions */
      intel_vvp_tmo_set_debug(&intel_vvp_tmo_instance, reg_val);
    }
  }
  else
  {
    printf("Error initializing intel_vvp_tmo instance: %d\n", ret);
  }

  return ret;
}

The TMO IP software driver does not include the process_user_input(&intel_vvp_tmo_instance) function, as its implementation depends on your system requirements and specifications. You can query and update TMO strength volume values in various ways. For example, you can implement the process_user_input(&intel_vvp_tmo_instance) in this way:

void process_user_input(intel_vvp_tmo_instance* instance)
{
  int c = getchar();
  static const int32_t VOL_STEP = 5;
  static const int32_t TS_STEP = 1000;
  int vol_delta = 0;
  int ts_delta = 0;

  if(c != EOF)
  {
    switch(c)
    {
      case 'w':
      case 'W':
        vol_delta = VOL_STEP;
        break;
      case 's':
      case 'S':
        vol_delta = -VOL_STEP;
        break;
      case 'd':
      case 'D':
        ts_delta = TS_STEP;
        break;
      case 'a':
      case 'A':
        ts_delta = - TS_STEP;
        break;
      case 'b':
      case 'B':
      {
        uint32_t bypass = intel_vvp_tmo_get_bypass(instance);
        bypass ^= 0x1;
        intel_vvp_tmo_set_bypass(instance, bypass);
        printf("TMO Bypass %s\n\n", bypass ? "ENABLED" : "DISABLED");
      }
        break;
      default:
        break;
    }

    if(vol_delta || ts_delta)
    {
      int32_t vol = (int32_t)(intel_vvp_tmo_get_volume(instance));
      int32_t ts = (int32_t)(intel_vvp_tmo_get_threshold(instance));

      vol += vol_delta;
      ts += ts_delta;

      if(vol > 100)
      vol = 100;

      if(vol < 0)
      vol = 0;

      if(ts > 9000)
      ts = 9000;

      if(ts < 0)
      ts = 0;

      printf("VOL: %"PRIi32"\n", vol);
      printf("TS: %"PRIi32"\n", ts);

      intel_vvp_tmo_set_volume(instance, (uint32_t)(vol));
      intel_vvp_tmo_set_threshold(instance, (uint32_t)(ts));
    }
  }
}

All the API functions require a pointer to intel_vvp_tmo_instance_t structure as the first parameter. The structure represents an individual instance of TMO IP and defined as following:

typedef struct intel_vvp_tmo_instance {
intel_vvp_tmo_base_t base;
} intel_vvp_tmo_instance_t;

Where:

intel_vvp_tmo_base_t base is a platform specific access handler that the driver uses to access configuration and control registers of the IP. Default definition for a bare metal environment is 32-bit unsigned integer representing base address of the TMO IP on the external CPU bus.

The internal driver uses the following macros to access individual registers of the IP:

  • tmoss_read_reg(x) – read register
  • tmoss_write_reg(x,y) – write register

Where:

x is the byte offset of the register from the IP core base address

y is the 32-bit register value to write.

Default bare metal implementation of the IP register access provided in the file intel_vvp_tmo_io.h. Provide alternative implementations through separate header files included conditionally from intel_vvp_tmo_io.h.

Byte offsets of all TMO IP registers are defined in the file intel_vvp_tmo_regs.h.

Table 531.   Software driver API reference The software driver for TMO IP provides various API functions
Name Description
intel_vvp_tmo_init_instance Initialize TMO IP driver instance
intel_vvp_tmo_set_bypass Set TMO IP into bypass mode
intel_vvp_tmo_get_bypass Return current setting of the bypass mode
intel_vvp_tmo_set_resolution Set input video resolution for TMO IP
intel_vvp_tmo_set_volume Adjust fine-level TMO volume as a percentage, which allows more granularity when setting TMO strength value
intel_vvp_tmo_get_volume Return current level of TMO strength
intel_vvp_tmo_set_threshold Adjust coarse level TMO volume, which allows setting TMO strength value
intel_vvp_tmo_get_threshold Return current value of fine-level TMO volume adjustment
intel_vvp_tmo_set_roi_en Enable or disable the region of interest mode
intel_vvp_tmo_set_roi_swap Enable or disable swap region in region of interest mode
intel_vvp_tmo_set_roi_horizontal_x0x1 Set horizontal starting and ending positions of the region of interest, implicitly enables region of interest mode
intel_vvp_tmo_set_roi_vertical_y0y1 Set vertical starting and ending positions of the region of interest, implicitly enables region of interest mode
intel_vvp_tmo_get_roi_en Return current value of the region of interest enable bit
intel_vvp_tmo_get_roi_swap Return current value of the region of interest swap bit
intel_vvp_tmo_get_roi_horizontal_x0 Return current value of the horizontal starting position of the region of interest
intel_vvp_tmo_get_roi_horizontal_x1 Return current value of the horizontal ending position of the region of interest
intel_vvp_tmo_get_roi_vertical_y0 Return current value of the vertical starting position of the region of interest
intel_vvp_tmo_get_roi_vertical_y1 Return current value of the vertical ending position of the region of interest
intel_vvp_tmo_get_pip Return current configuration value of the number of pixels-in-parallel
intel_vvp_tmo_get_resolution_width Return width of the current video resolution in number of pixels
intel_vvp_tmo_get_resolution_height Return height of the current video resolution in number of lines
intel_vvp_tmo_get_debug Return current value of debug information register
intel_vvp_tmo_set_debug Clear individual bits in debug information register

intel_vvp_tmo_init_instance

int intel_vvp_tmo_init_instance(intel_vvp_tmo_instance_t* instance, intel_vvp_tmo_base_t base)
Description
Initialize TMO software driver instance
Arguments
instance – pointer to the TMO software driver instance structure
base – platform specific IP access handle. In a bare metal environment this is typically defined as 32-bit unsigned integer representing base address of the IP on the external CPU bus
Return Value
Zero on success, negative integer otherwise

intel_vvp_tmo_set_bypass

void intel_vvp_tmo_set_bypass(intel_vvp_tmo_instance_t* instance, uint32_t bypass)
Description
Enable/disable TMO bypass mode. With bypass mode the TMO IP does not process the incoming video stream and passes it as is.
Arguments
instance – pointer to the TMO software driver instance structure
bypass - 1 – enable bypass mode; 0 – disable bypass mode
Return Value
void

intel_vvp_tmo_get_bypass

uint32_t intel_vvp_tmo_get_bypass(intel_vvp_tmo_instance_t* instance)
Description
Get the current setting of the bypass mode
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
1 – bypass mode is enabled; 0 – bypass mode is disabled

intel_vvp_tmo_set_resolution

void intel_vvp_tmo_set_resolution(intel_vvp_tmo_instance_t* instance, const uint32_t width, const uint32_t height)
Description
Set up TMO IP for the required video resolution
Arguments
instance – pointer to the TMO software driver instance structure
width - video width in pixels e.g. 1920
height - video height in lines e.g. 1080
Return Value
void

intel_vvp_tmo_set_volume

void intel_vvp_tmo_set_volume(intel_vvp_tmo_instance_t* instance, const uint32_t volume)
Description
Set desired tone enhancement strength
Arguments
instance – pointer to the TMO software driver instance structure
volume - tone enhancement strength in the range [0..100]
Return Value
void

intel_vvp_tmo_get_volume

uint32_t intel_vvp_tmo_get_volume(intel_vvp_tmo_instance_t* instance)
Description
Get currently configured tone enhancement strength
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current tone enhancement strength in the range [0..100]

intel_vvp_tmo_set_threshold

void intel_vvp_tmo_set_threshold(intel_vvp_tmo_instance_t* instance, const uint32_t threshold)
Description
Set fine-level tone enhancement strength
Arguments
instance – pointer to the TMO software driver instance structure
threshold – fine level tone enhancement strength in the range [0..10000]
Return Value
void

intel_vvp_tmo_get_threshold

uint32_t intel_vvp_tmo_get_threshold(intel_vvp_tmo_instance_t* instance)
Description
Get currently configured fine-level tone enhancement strength
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current fine level tone enhancement strength in the range [0..10000]

intel_vvp_tmo_set_roi_en

void intel_vvp_tmo_set_roi_en(intel_vvp_tmo_instance_t* instance, uint32_t roi_en)
Description
Enable or disable the region of interest mode
Arguments

instance – pointer to the TMO software driver instance

region of interest enable – 1 – enable region of interest mode, 0 – disable region of interest mode

Return Value
void

intel_vvp_tmo_set_roi_swap

void intel_vvp_tmo_set_roi_swap(intel_vvp_tmo_instance_t* instance, uint32_t roi_swap)
Description
Enable or disable swap region in region of interest mode
Arguments

instance – pointer to the TMO software driver instance

region of interest swap – 1 – swap the region of interest, 0 – do not swap the region of interest

Return Value
void

intel_vvp_tmo_set_roi_horizontal_x0x1

void intel_vvp_tmo_set_roi_horizontal_x0x1(intel_vvp_tmo_instance_t* instance, const uint32_t
          pos_x0, const uint32_t pos_x1)
Description
Set horizontal starting and ending positions of the region of interest, implicitly enables region of interest mode
Arguments

instance – pointer to the TMO software driver instance

horizontal region of interest starting position – starting pixel position of the region of interest in the width dimension, divided by pixels-in-parallel

horizontal region of interest ending position – ending pixel position of the region of interest in the width dimension, divided by pixels-in-parallel

Return Value
void

intel_vvp_tmo_set_roi_vertical_y0y1

void intel_vvp_tmo_set_roi_vertical_y0y1(intel_vvp_tmo_instance_t* instance, const uint32_t
          pos_y0, const uint32_t pos_y1)
Description
Set vertical starting and ending positions of the region of interest, implicitly enables region of interest mode
Arguments

instance – pointer to the TMO software driver instance

vertical region of interest starting position – starting line position of the region of interest in the height dimension

vertical region of interest ending position – ending line position of the region of interest in the height dimension

Return Value
void

intel_vvp_tmo_get_roi_en

uint32_t
intel_vvp_tmo_get_roi_en(intel_vvp_tmo_instance_t* instance)
Description
Return current value of the region of interest enable bit
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
1 – region of interest mode is enabled; 0 – region of interest mode is disabled

intel_vvp_tmo_get_roi_swap

uint32_t
intel_vvp_tmo_get_roi_swap(intel_vvp_tmo_instance_t* instance)
Description
Return current value of the region of interest swap bit
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
1 – region of interest is swapped; 0 – region of interest is not swapped

intel_vvp_tmo_get_roi_horizontal_x0

uint32_t
intel_vvp_tmo_get_roi_horizontal_x0(intel_vvp_tmo_instance_t*
instance)
Description
Return current value of the horizontal starting position of the region of interest
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the horizontal starting pixel position of the region of interest, divided by pixels-in-parallel

intel_vvp_tmo_get_roi_horizontal_x1

uint32_t
intel_vvp_tmo_get_roi_horizontal_x1(intel_vvp_tmo_instance_t*
instance)
Description
Return current value of the horizontal ending position of the region of interest
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the horizontal ending pixel position of the region of interest, divided by pixels-in-parallel

intel_vvp_tmo_get_roi_vertical_y0

uint32_t
intel_vvp_tmo_get_roi_vertical_y0(intel_vvp_tmo_instance_t*
instance)
Description
Return current value of the vertical starting position of the region of interest
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the vertical starting line position of the region of interest

intel_vvp_tmo_get_roi_vertical_y1

uint32_t
intel_vvp_tmo_get_roi_vertical_y1(intel_vvp_tmo_instance_t*
instance)
Description
Return current value of the vertical ending position of the region of interest
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the vertical ending line position of the region of interest

intel_vvp_tmo_get_pip

uint32_t
intel_vvp_tmo_get_pip(intel_vvp_tmo_instance_t*
instance)
Description
Return current configuration value of the number of pixels-in-parallel
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Configuration value of the number of pixels-in-parallel

intel_vvp_tmo_get_resolution_width

uint32_t
intel_vvp_tmo_get_resolution_width(intel_vvp_tmo_instance_t*
instance)
Description
Return width of the current video resolution in number of pixels
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the video resolution width in number of pixels

intel_vvp_tmo_get_resolution_height

uint32_t
intel_vvp_tmo_get_resolution_height(intel_vvp_tmo_instance_t*
instance)
Description
Return height of the current video resolution in number of lines
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of the video resolution height in number of lines

intel_vvp_tmo_get_debug

uint32_t intel_vvp_tmo_get_debug(intel_vvp_tmo_instance_t* instance)
Description
Get current value of the Debug information register Ext_Reg_0xA0
Arguments
instance – pointer to the TMO software driver instance structure
Return Value
Current value of Ext_Reg_0xA0 as 32-bit unsigned integer

intel_vvp_tmo_set_debug

void intel_vvp_tmo_set_debug(intel_vvp_tmo_instance_t* instance, uint32_t val)
Description
Clear individual bits of the Debug information register Ext_Reg_0xA0
Arguments
instance – pointer to the TMO software driver instance structure
val - bit mask of the bits within the debug register to clear
Return Value
void