Video and Vision Processing Suite Intel® FPGA IP User Guide

ID 683329
Date 10/02/2023
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. Bits per Color Sample Adapter Intel FPGA IP 11. Chroma Key Intel® FPGA IP 12. Chroma Resampler Intel® FPGA IP 13. Clipper Intel® FPGA IP 14. Clocked Video Input Intel® FPGA IP 15. Clocked Video to Full-Raster Converter Intel® FPGA IP 16. Clocked Video Output Intel® FPGA IP 17. Color Space Converter Intel® FPGA IP 18. Deinterlacer Intel® FPGA IP 19. FIR Filter Intel® FPGA IP 20. Frame Cleaner Intel® FPGA IP 21. Full-Raster to Clocked Video Converter Intel® FPGA IP 22. Full-Raster to Streaming Converter Intel® FPGA IP 23. Genlock Controller Intel® FPGA IP 24. Generic Crosspoint Intel® FPGA IP 25. Genlock Signal Router Intel® FPGA IP 26. Guard Bands Intel® FPGA IP 27. Interlacer Intel® FPGA IP 28. Mixer Intel® FPGA IP 29. Pixels in Parallel Converter Intel® FPGA IP 30. Scaler Intel® FPGA IP 31. Stream Cleaner Intel® FPGA IP 32. Switch Intel® FPGA IP 33. Tone Mapping Operator Intel® FPGA IP 34. Test Pattern Generator Intel® FPGA IP 35. Video and Vision Monitor Intel FPGA IP 36. Video Frame Buffer Intel® FPGA IP 37. Video Frame Reader Intel FPGA IP 38. Video Frame Writer Intel FPGA IP 39. Video Streaming FIFO Intel® FPGA IP 40. Video Timing Generator Intel® FPGA IP 41. Warp Intel® FPGA IP 42. Design Security 43. Document Revision History for Video and Vision Processing Suite User Guide
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11.6. Chroma Key IP Software API

The IP includes software for run-time control. The IP does not fit any of the generic device models provided by the Nios II HAL and it exposes a set of dedicated accessors to the control and status registers. The IP driver structure inherits the base driver structure so all common methods defined in Video and Vision Processing IPs Software API are applicable.

Register definition header file: intel_vvp_chroma_key_regs.h

Include file: intel_vvp_chroma_key.h

Table 115.  Chroma Key IP Software API
Name Description
intel_vvp_chroma_key_init Initialize the Chroma Key instance
intel_vvp_core_* Accessors defined in Video and Vision Processing IPs Software Programming Model . Writable when Lite mode is on. Readable when Lite mode is off and Debug features is on.
intel_vvp_chroma_key_get_lite_mode Returns if Lite mode is on
intel_vvp_chroma_key_get_debug_enabled Returns if Debug features is on
intel_vvp_chroma_key_get_constant_alpha_mode Returns if Constant alpha mode is on
intel_vvp_chroma_key_get_constant_alpha_value Returns the constant alpha value if Constant alpha mode is on
intel_vvp_chroma_key_get_bits_per_sample Returns the bits per color sample value
intel_vvp_chroma_key_get_num_planes Returns the number of color planes
intel_vvp_chroma_key_is_running Returns if the IP is currently processing video data
intel_vvp_chroma_key_get_commit_status Returns if IP has uncommitted writes
intel_vvp_chroma_key_get_status Reads the status register
intel_vvp_chroma_key_set_matched_alpha Sets the alpha value for matched pixels
intel_vvp_chroma_key_set_unmatched_alpha Sets the alpha value for unmatched pixels
intel_vvp_chroma_key_enable_c1_matching Enables the first color plane when checking for matches
intel_vvp_chroma_key_disable_c1_matching Disables the first color plane when checking for matches
intel_vvp_chroma_key_enable_c2_matching Enables the second color plane when checking for matches
intel_vvp_chroma_key_disable_c2_matching Disables the second color plane when checking for matches
intel_vvp_chroma_key_enable_c3_matching Enables the third color plane when checking for matches
intel_vvp_chroma_key_disable_c3_matching Disables the third color plane when checking for matches
intel_vvp_chroma_key_enable_c1_replacement Enables the swapping of the first color plane sample in case of a match
intel_vvp_chroma_key_disable_c1_replacement Disables the swapping of the first color plane sample in case of a match
intel_vvp_chroma_key_enable_c2_replacement Enables the swapping of the second color plane sample in case of a match
intel_vvp_chroma_key_disable_c2_replacement Disables the swapping of the second color plane sample in case of a match
intel_vvp_chroma_key_enable_c3_replacement Enables the swapping of the third color plane sample in case of a match
intel_vvp_chroma_key_disable_c3_replacement Disables the swapping of the third color plane sample in case of a match
intel_vvp_chroma_key_commit_writes Commit all outstanding writes

intel_vvp_chroma_key_init

Prototype
int intel_vvp_chroma_key_init(intel_vvp_chroma_key_instance *instance, intel_vvp_core_base base);
Description

Initializes an Chroma Key instance. The initialization stops early if the vendor ID or product ID read at the base address are not a match or if the register map version is not supported. Otherwise, the function proceeds to read and store the IP compile-time parameterization. The instance is not fully initialized and the application should not use it further if returning a non-zero error code.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

base - base address of the register map

Returns

kIntelVvpCoreOk (0) in case of success, a negative error code in case of error

kIntelVvpCoreVidErr if the vendor id of the core is not the IntelFPGA vendor ID (0x6AF7).

kIntelVvpCorePidErr if the product_id does not match with the Chroma Key product ID

kIntelVvpCoreInstanceErr if the instance is a null pointer

kIntelVvpChroma KeyRegMapVersionErr if the register map is not supported

intel_vvp_chroma_key_get_lite_mode

Prototype
bool intel_vvp_chroma_key_get_lite_mode(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the LITE_MODE register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

true if the IP is parameterized in lite mode

intel_vvp_chroma_key_get_debug_enabled

Prototype
 bool intel_vvp_chroma_key_get_debug_enabled(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the DEBUG_ENABLED register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

true if the IP is parameterized with debug features enabled

intel_vvp_chroma_key_get_constant_alpha_mode

Prototype
 bool intel_vvp_chroma_key_get_constant_alpha_mode(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the CONSTANT_ALPHA_MODE register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

true if the IP is parameterized to add a constant alpha value to the video stream

intel_vvp_chroma_key_get_constant_alpha_value

Prototype
 uint16_t intel_vvp_chroma_key_get_constant_alpha_value(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the CONSTANT_ALPHA_VALUE register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized and parameterized for constant alpha mode

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

The constant alpha value if the IP is parameterized with constant alpha mode

intel_vvp_chroma_key_get_bits_per_sample

Prototype
 uint8_t intel_vvp_chroma_key_get_bits_per_sample(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the BITS_PER_SAMPLES parameter used to configure the IP. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

the number of bits per color sample

intel_vvp_chroma_key_get_num_planes

Prototype
 uint8_t intel_vvp_chroma_key_get_num_planes(intel_vvp_chroma_key_instance *instance);
Description

Returns the value of the NUMBER_OF_COLOR_PLANES parameter used to configure the IP. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

the number of color planes per pixel

intel_vvp_chroma_key_is_running

Prototype
 bool intel_vvp_chroma_key_is_running(intel_vvp_chroma_key_instance* instance);
Description

Reads and returns the running bit of the STATUS register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

True is the IP is currently receiving/storing an input field, false when between two input fields

intel_vvp_chroma_key_get_commit_status

Prototype
 bool intel_vvp_chroma_key_get_commit_status(intel_vvp_chroma_key_instance* instance);
Description

Reads and returns the commit pending bit of the STATUS register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized and configured in full mode.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

True is the IP is configured in full mode and if the agent interface contains uncommitted writes.

intel_vvp_chroma_key_get_status

Prototype
 uint32_t intel_vvp_chroma_key_get_status(intel_vvp_chroma_key_instance* instance);
Description

Reads the STATUS register. The instance must be a valid intel_vvp_chroma_key_instance fully initialized.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

The content of the STATUS register

intel_vvp_chroma_key_set_matched_alpha

Prototype
 int intel_vvp_chroma_key_set_matched_alpha(intel_vvp_chroma_key_instance *instance, uint16_t matched_alpha);
Description

Sets the alpha value for matched pixels. The instance must be a valid intel_vvp_chroma_key_instance fully initialized and not parameterized for constant alpha mode.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

matched_alpha - the alpha value for matched pixels in the range [0..bits_per_sample-1]

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha only

kIntelVvpChromaKeyValueErr if the matched alpha is invalid

intel_vvp_chroma_key_set_unmatched_alpha

Prototype
 int intel_vvp_chroma_key_set_unmatched_alpha(intel_vvp_chroma_key_instance *instance, uint16_t unmatched_alpha);
Description

Sets the alpha value for unmatched pixels. The instance must be a valid intel_vvp_chroma_key_instance fully initialized and not parameterized for constant alpha mode.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

unmatched_alpha - the alpha value for unmatched pixels in the range [0..bits_per_sample-1]

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid

kIntelVvpChromaKeyValueErr if the unmatched alpha is invalid

intel_vvp_chroma_key_enable_c1_matching

Prototype
 int intel_vvp_chroma_key_enable_c1_matching(intel_vvp_chroma_key_instance *instance, uint16_t c1_lower_bound, uint16_t c1_upper_bound);
Description

Enables pixel matching with the first color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c1_lower_bound - the lowest sample value, in the range [0..bits_per_sample-1], to match a color sample

c1_upper_bound - the highest sample value, in the range [0..bits_per_sample-1], to match a color sample

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output

kIntelVvpChromaKeyValueErr if the lower bound or upper bound are invalid

intel_vvp_chroma_key_disable_c1_matching

Prototype
 int intel_vvp_chroma_key_disable_c1_matching(intel_vvp_chroma_key_instance* instance);
Description

Disables pixel matching with the first color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output

intel_vvp_chroma_key_enable_c2_matching

Prototype
 int intel_vvp_chroma_key_enable_c1_matching(intel_vvp_chroma_key_instance *instance, uint16_t c2_lower_bound, uint16_t c2_upper_bound);
Description

Enables pixel matching with the second color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c2_lower_bound - the lowest sample value, in the range [0..bits_per_sample-1], to match a color sample

c2_upper_bound - the highest sample value, in the range [0..bits_per_sample-1], to match a color sample

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than two color planes

kIntelVvpChromaKeyValueErr if the lower bound or upper bound are invalid

intel_vvp_chroma_key_disable_c2_matching

Prototype
 int intel_vvp_chroma_key_disable_c2_matching(intel_vvp_chroma_key_instance* instance);
Description

Disables pixel matching with the second color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than two color planes

intel_vvp_chroma_key_enable_c3_matching

Prototype
 int intel_vvp_chroma_key_enable_c3_matching(intel_vvp_chroma_key_instance *instance, uint16_t c3_lower_bound, uint16_t c3_upper_bound);
Description

Enables pixel matching with the third color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c3_lower_bound - the lowest sample value, in the range [0..bits_per_sample-1], to match a color sample

c3_upper_bound - the highest sample value, in the range [0..bits_per_sample-1], to match a color sample

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than three color planes

kIntelVvpChromaKeyValueErr if the lower bound or upper bound are invalid

intel_vvp_chroma_key_disable_c3_matching

Prototype
 int intel_vvp_chroma_key_disable_c3_matching(intel_vvp_chroma_key_instance* instance);
Description

Disables pixel matching with the third color sample value

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than three color planes

intel_vvp_chroma_key_enable_c1_replacement

Prototype
 int intel_vvp_chroma_key_enable_c1_replacement(intel_vvp_chroma_key_instance *instance, uint16_t c1_replacement)
Description

Swaps the first color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c1_replacement - the replacement sample value, in the range [0..bits_per_sample-1], when a pixel was matched

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output

kIntelVvpChromaKeyValueErr if the replacement value is invalid

intel_vvp_chroma_key_disable_c1_replacement

Prototype
int intel_vvp_chroma_key_disable_c1_replacement(intel_vvp_chroma_key_instance *instance)
Description

Cancels the swap of the first color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output

intel_vvp_chroma_key_enable_c2_replacement

Prototype
 int intel_vvp_chroma_key_enable_c2_replacement(intel_vvp_chroma_key_instance *instance, uint16_t c2_replacement)
Description

Swaps the second color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c2_replacement - the replacement sample value, in the range [0..bits_per_sample-1], when a pixel was matched

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than two color planes

kIntelVvpChromaKeyValueErr if the replacement value is invalid

intel_vvp_chroma_key_disable_c2_replacement

Prototype
int intel_vvp_chroma_key_disable_c2_replacement(intel_vvp_chroma_key_instance *instance)
Description

Cancels the swap of the second color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than two color planes

intel_vvp_chroma_key_enable_c3_replacement

Prototype
 int intel_vvp_chroma_key_enable_c3_replacement(intel_vvp_chroma_key_instance *instance, uint16_t c3_replacement)
Description

Swaps the third color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

c3_replacement - the replacement sample value, in the range [0..bits_per_sample-1], when a pixel was matched

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than three color planes

kIntelVvpChromaKeyValueErr if the replacement value is invalid

intel_vvp_chroma_key_disable_c3_replacement

Prototype
int intel_vvp_chroma_key_disable_c3_replacement(intel_vvp_chroma_key_instance *instance)
Description

Cancels the swap of the third color plane sample value when a pixel is matched

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk for success, negative error code in case of failures

kIntelVvpCoreInstanceErr if the instance is invalid or parameterized for constant alpha output or with less than three color planes

intel_vvp_chroma_key_commit_writes

Prototype
 int intel_vvp_chroma_key_commit_writes(intel_vvp_chroma_key_instance* instance)
Description

Commits all pending writes before processing the next field. The instance must be valid and parameterized in full mode.

Arguments

instance - pointer to the intel_vvp_chroma_key_instance software driver instance structure

Returns

kIntelVvpCoreOk (0) for success, negative error code otherwise