Visible to Intel only — GUID: qxm1641479995382
Ixiasoft
Visible to Intel only — GUID: qxm1641479995382
Ixiasoft
20.5. Color Space Converter IP Software API
Register definition header file: intel_vvp_csc_regs.h
Include file: intel_vvp_csc.h
Name | Description |
---|---|
intel_vvp_csc_init | Initialize the Color Space Converter instance |
Intel_vvp_core_* | Accessors defined in Video and Vision Processing IPs Software Programming Model. Writable when Lite is on. Readable when Lite is off and Debug features is on. |
intel_vvp_csc_get_lite_mode | Returns if Lite mode is on |
intel_vvp_csc_get_debug_enabled | Returns if Debug features is on |
intel_vvp_csc_get_bits_per_sample_in
|
Returns the number of input bits per color sample |
intel_vvp_csc_get_bits_per_sample_out
|
Returns the number of output bits per color sample |
intel_vvp_csc_are_coeffs_signed | Returns if the nine coefficients have a sign bit and can be negative |
intel_vvp_csc_get_coeffs_int_bits
|
Returns the number of integer bits (excluding sign bit) available to quantize coefficients |
intel_vvp_csc_are_summands_signed | Returns if the three summands have a sign bit and can be negative |
intel_vvp_csc_get_summands_int_bits
|
Returns the number of integer bits (excluding sign bit) available to quantize summands |
intel_vvp_csc_get_coeffs_frac_bits
|
Returns the number of fractional bits available to quantize both coefficients and summands |
intel_vvp_csc_get_binary_point_right_move | Returns the fixed scaling factor applied to values at the output of the IP |
intel_vvp_csc_get_rounding_method | Returns the method used to convert floating-point values back to integer values at the output of the IP |
intel_vvp_csc_is_running | Returns if the IP is currently processing video data |
intel_vvp_csc_get_commit_status | Returns if there are uncommitted writes |
intel_vvp_csc_get_status | Reads the status register |
intel_vvp_csc_set_quantized_coeff_data | Program the IP with a new set of quantized coefficients/summands |
intel_vvp_csc_get_quantized_coeff_data | Retrieve the set of quantized coefficients/summands programmed into the IP |
intel_vvp_csc_set_coeff_data | Program the IP with a new set of floating-point coefficients/summands |
intel_vvp_csc_get_coeff_data | Retrieve the set of floating-point coefficients/summands programmed into the IP |
intel_vvp_csc_set_output_color_space | Selects the current output color space (full mode) |
intel_vvp_csc_get_output_color_space | Returns the current output color space (full mode) |
intel_vvp_csc_commit_writes | Commit all outstanding writes |
enum eIntelVvpCscRounding
- Members
-
kIntelVvpCscRoundUp (1) – Rounding up (half up towards positive infinity)
kIntelVvpCscRoundHalfEven (2) – Rounding half to even (bankers’ rounding)
kIntelVvpCscRoundTruncate (3) – Truncation (no rounding)
kIntelVvpCscRoundInvalid (-1) – Invalid rounding method (used to indicate errors)
- Description
-
Enumeration for the rounding method used by the IP
enum eIntelVvpCscColorSpace
- Members
-
kIntelVvpCsRgb (0) – Rounding up (half up towards positive infinity)
kIntelVvpCsYcc (1) – Rounding half to even (bankers’ rounding)
kIntelVvpCsMono (2) – Truncation (no rounding)
kIntelVvpCscRoundInvalid (-1) – Invalid rounding method (used to indicate errors)
- Description
-
Enumeration for the rounding method used by the IP
struct intel_vvp_coefficients
- Members
-
struct { float c1; float c2; float c3; } coeffs[3]; – Matrix of 9 coefficients
float s[3] – Vector of 3 summands
- Description
-
The coefficients and summands as floating-point values
struct intel_vvp_quantized_coefficients
- Members
-
struct { int32_t c1; int32_t c2; int32_t c3; } coeffs[3]; – Matrix of 9 coefficients
int32_t s[3] – Vector of 3 summands
- Description
-
The coefficients and summands as quantized integer values
intel_vvp_csc_init
- Prototype
-
int intel_vvp_csc_init(intel_vvp_csc_instance *instance, intel_vvp_core_base base);
- Description
-
Initializes a Color Space Converter 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 does not fully initialized and should not be used further by the application if returning a non-zero error code.
- Arguments
-
instance – pointer to the intel_vvp_csc_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 Color Space Converter product ID
kIntelVvpCoreInstanceErr if the instance is a null pointer
kIntelVvpCscRegMapVersionErr if the register map is not supported
intel_vvp_csc_get_lite_mode
- Prototype
-
bool intel_vvp_csc_get_lite_mode(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the LITE_MODE register. The instance must be a valid intel_vvp_csc_instance fully initialized
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
true if the IP is parameterized in lite mode
intel_vvp_csc_get_debug_enabled
- Prototype
-
bool intel_vvp_csc_get_debug_enabled(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the DEBUG_ENABLED register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
true if the IP is parameterized with debug features enabled
intel_vvp_csc_get_bits_per_sample_in
- Prototype
-
uint8_t intel_vvp_csc_get_bits_per_sample_in(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the BPS_IN register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the input bits per sample parameter used to generate the IP.
intel_vvp_csc_get_bits_per_sample_out
- Prototype
-
uint8_t intel_vvp_csc_get_bits_per_sample_out(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the BPS_OUT register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the output bits per sample parameter used to generate the IP.
intel_vvp_csc_are_coeffs_signed
- Prototype
-
bool intel_vvp_csc_are_coeffs_signed(intel_vvp_csc_instance* instance);
- Description
-
Returns the value of the COEFFS_SIGNED register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
If signed coefficients have been allowed at IP generation time.
intel_vvp_csc_get_coeffs_int_bits
- Prototype
-
uint8_t intel_vvp_csc_get_coeffs_int_bits (intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the COEFFS_INT_BITS register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the number of integer bits set at IP generation time to parameterize the quantization of the coefficients
intel_vvp_csc_are_summands_signed
- Prototype
-
bool intel_vvp_csc_are_summands_signed(intel_vvp_csc_instance* instance);
- Description
-
Returns the value of the SUMMANDS_SIGNED register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
If signed summands have been allowed at IP generation time.
intel_vvp_csc_get_summands_int_bits
- Prototype
-
uint8_t intel_vvp_csc_get_summands_int_bits (intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the SUMMANDS_INT_BITS register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the number of integer bits set at IP generation time to parameterize the quantization of the summands
intel_vvp_csc_get_coeffs_frac_bits
- Prototype
-
uint8_t intel_vvp_csc_get_coeffs_frac_bits (intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the FRAC_BITS register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the number of fractional bits set at IP generation time to parameterize the quantization of the coefficients and summands
intel_vvp_csc_get_binary_point_right_move
- Prototype
-
int8_t intel_vvp_csc_get_binary_point_right_move(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the BINARY_POINT_RIGHT_MOVE register. The fixed scaling factor applied to the IP output samples and selected at IP generation time. Output values are scaled by 2^(binary_point_right_move). This is usually done to account for differences between bps_in and bps_out. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
The binary_point_right_move value selected at generation time
intel_vvp_csc_get_rounding_method
- Prototype
-
eIntelVvpCscRounding intel_vvp_csc_get_rounding_method(intel_vvp_csc_instance *instance);
- Description
-
Returns the value of the ROUND_METHOD register. The instance must be a valid intel_vvp_csc_instance fully initialized. This is the method to convert fixed-point values to integer values at the end of the CSC processing.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
The IP rounding method.
intel_vvp_csc_is_running
- Prototype
-
bool intel_vvp_csc_is_running(intel_vvp_csc_instance* instance);
- Description
-
Reads and returns the running bit of the STATUS register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_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_csc_get_commit_status
- Prototype
-
bool intel_vvp_csc_get_commit_status(intel_vvp_csc_instance* instance);
- Description
-
Reads and returns the commit pending bit of the STATUS register. The instance must be a valid intel_vvp_csc_instance fully initialized and configured in full mode.
- Arguments
-
instance – pointer to the intel_vvp_csc_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_csc_get_status
- Prototype
-
uint32_t intel_vvp_csc_get_status(intel_vvp_csc_instance* instance);
- Description
-
Reads the STATUS register. The instance must be a valid intel_vvp_csc_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
The content of the STATUS register
intel_vvp_csc_set_quantized_coeff_data
- Prototype
-
int intel_vvp_csc_set_quantized_coeff_data(intel_vvp_csc_instance* instance, const intel_vvp_quantized_coefficients* quantized_coeffs);
- Description
-
Programs the IP with the set of coefficients and summands. The call checks for correctness of the quantized values and returns an error if invalid bits are set. Sign extension to the full 32 bit range is accepted. Quantization errors do not prevent the coefficients from being updated
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
quantized_coeffs – pointer to the structure containing the 9 quantized coefficients and summands
- Returns
-
kIntelVvpCoreOk in case of success, negative error code otherwise
kIntelVvpCoreInstanceErr if the instance is invalid
kIntelVvpCoreNullPtrErr if quantized_coeffs is a NULL pointer
kIntelVvpCscQuantizationErr if the quantized coefficients/summands are out-of-range
intel_vvp_csc_get_quantized_coeff_data
- Prototype
-
int intel_vvp_csc_get_quantized_coeff_data(intel_vvp_csc_instance* instance, intel_vvp_quantized_coefficients* quantized_coeffs)
- Description
-
Reads and returns the current set of coefficients programmed in the IP. The instance must be a valid intel_vvp_csc_instance fully initialized and configured with debug enabled.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
quantized_coeffs – storage space to return the quantized coefficients
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error
kIntelVvpCoreInstanceErr, if the instance is invalid
kIntelVvpCoreNullPtrErr, if quantized_coeffs is the NULL pointer
intel_vvp_csc_set_coeff_data
- Prototype
-
int intel_vvp_csc_set_coeff_data(intel_vvp_csc_instance* instance, const intel_vvp_coefficients* coeffs, int summand_rescale);
- Description
-
Programs the IP with the set of coefficients and summands. The call quantizes the user-defined floating-point coefficients and returns an error if values are out-of-range. Quantization errors do not prevent the coefficients from being updated
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
coeffs – pointer to the structure containing the 9 floating-point coefficients and 3 summands
summand_rescale – scaling factor (2^summand_rescale) applied to the input summand values. Non-zero values are typically used when using a ready-made conversion table designed for a number of bits per color sample that does not match with the input bits per sample value used to parameterize the IP
- Returns
-
kIntelVvpCoreOk in case of success, negative error code otherwise
kIntelVvpCoreInstanceErr if the instance is invalid
kIntelVvpCoreNullPtrErr if coeffs is a NULL pointer
kIntelVvpCscQuantizationErr if the coefficients/summands are out-of-range and cannot be quantized accurately
intel_vvp_csc_get_coeff_data
- Prototype
-
int intel_vvp_csc_get_coeff_data(intel_vvp_csc_instance* instance, intel_vvp_coefficients* coeffs)
- Description
-
Reads and returns the current set of coefficients programmed in the IP. The instance must be a valid intel_vvp_csc_instance fully initialized and configured with debug enabled. Coefficients are converted back to floating-point values before being returned.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
coeffs – storage space to return the floating-point coefficients
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error
kIntelVvpCoreInstanceErr, if the instance is invalid
kIntelVvpCoreNullPtrErr, if coeffs is the NULL pointer
intel_vvp_csc_set_output_colorspace
- Prototype
-
int intel_vvp_csc_set_output_colorspace(intel_vvp_csc_instance* instance, int8_t output_color_space);
- Description
-
Writes the required output colorspace to the OUTPUT_CS register. The instance must be a valid intel_vvp_csc_instance fully initialized and configured in full mode.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
output_color_space – a colorspace code
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error
kIntelVvpCoreInstanceErr, if the instance is invalid
kIntelVvpCscParamErr, if the output colorspace is invalid (<0)
intel_vvp_csc_get_output_colorspace
- Prototype
-
int8_t intel_vvp_csc_get_output_colorspace(intel_vvp_csc_instance* instance);
- Description
- Reads the OUTPUT_CS register. The instance must be a valid intel_vvp_csc_instance fully initialized and configured in full mode with debug enabled.
- Arguments
-
instance – pointer to the intel_vvp_csc_instance software driver instance structure
- Returns
-
the last value written to the OUTPUT_CS register, negative value in case of errors
intel_vvp_csc_commit_writes
- Prototype
-
int intel_vvp_csc_commit_writes(intel_vvp_csc_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_csc_instance software driver instance structure
- Returns
-
kIntelVvpCoreOk (0) for success, negative error code otherwise