Visible to Intel only — GUID: zrg1641479871384
Ixiasoft
Visible to Intel only — GUID: zrg1641479871384
Ixiasoft
44.5. Video Frame Buffer IP Software API
Register definition header file: intel_vvp_vfb_regs.h
Include file: intel_vvp_vfb.h
Name | Description |
---|---|
intel_vvp_vfb_init | Initialize the Frame Buffer 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_v fb_get_lite_mode | Returns if Lite mode is on |
intel_vvp_v fb_get_debug_enabled | Returns if Debug features is on |
intel_vvp_vfb_get_max_width | Returns the maximum line width. |
intel_vvp_vfb_get_max_height | Returns the maximum frame height. |
intel_vvp_vfb_is_frame_drop_enabled | Returns if the IP can drop frame for frame rate conversion. |
intel_vvp_vfb_is_frame_repeat_enabled | Returns if the IP can repeat frame for frame rate conversion. |
intel_vvp_are_invalid_frames_dropped | Returns if the Frame Buffer drops invalid frames. |
intel_vvp_vfb_get_mem_base_address | Returns the memory base address. |
intel_vvp_vfb_get_buffer_stride | Returns the number of bytes allocated to each individual frame buffer in memory. |
intel_vvp_vfb_get_line_stride | Returns the number of bytes allocated to each individual video line in memory. |
intel_vvp_vfb_get_bits_per_sample | Returns the number of bits per color sample set at compile-time. |
intel_vvp_vfb_get_num_color_planes | Returns the number of color planes set at compile-time. |
intel_vvp_vfb_get_pixels_in_parallel | Returns the number of pixels transmitted in parallel on the video path (per clock cycle). |
intel_vvp_vfb_get_mem_word_packing | Returns how tightly video data is packed in memory words. |
intel_vvp_vfb_is_input_running | Returns if the IP is currently processing input data. |
intel_vvp_vfb_get_input_status | Reads the input status register. |
intel_vvp_vfb_is_output_running | Returns if the IP is currently producing output data. |
intel_vvp_vfb_get_output_status | Reads the output status register. |
intel_vvp_vfb_get_num_input_fields | Returns the number of fields received on the input. |
intel_vvp_vfb_get_num_dropped_fields | Returns the number of input fields dropped. |
intel_vvp_vfb_get_num_invalid_fields | Returns the number of invalid input fields. |
intel_vvp_vfb_get_num_output_fields | Returns the number of fields sent. |
intel_vvp_vfb_get_num_repeated_fields | Returns the number of repeated fields sent. |
intel_vvp_vfb_output_enable | Enables the frame buffer output. |
intel_vvp_vfb_is_output_enabled | Returns if the output is on or off. |
intel_vvp_vfb_start_output | Enables the frame buffer output. |
Intel_vvp_vfb_stop_output | Disables the frame buffer output. |
enum eIntelVvpVfbPacking
- Members
-
kIntelVvpVfbPerfectPacking – Compact sample packing, memory words are fully utilized
kIntelVvpVfbColorPacking – Memory words are packed with an integer number of color samples
kIntelVvpVfbPixelPacking– Memory words are packed with an integer number of pixels
kIntelVvpInvalidClipping – Invalid packing (used to indicate errors)
- Description
-
Enumeration for the supported packing methods
intel_vvp_vfb_init
- Prototype
-
int intel_vvp_vfb_init(intel_vvp_vfb_instance *instance, intel_vvp_core_base base);
- Description
-
Initializes a Frame Buffer 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 you should not use it further by the application if returning a non-zero error code.
- Arguments
-
instance – pointer to the intel_vvp_vfb_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 Intel FPGA vendor ID (0x6AF7).
kIntelVvpCorePidErr if the product_id does not match with the Frame Buffer product ID
kIntelVvpCoreInstanceErr if the instance is a null pointer
kIntelVvpVfbRegMapVersionErr if the register map is not supported
intel_vvp_vfb_get_lite_mode
- Prototype
-
bool intel_vvp_vfb_get_lite_mode(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the LITE_MODE register. The instance must be a valid intel_vvp_vfb_instance fully initialized
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
true if the IP is parameterized in lite mode
intel_vvp_vfb_get_debug_enabled
- Prototype
-
bool intel_vvp_vfb_get_debug_enabled(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the DEBUG_ENABLED register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
true if the IP is parameterized with debug features enabled
intel_vvp_vfb_get_max_width
- Prototype
-
uint32_t intel_vvp_vfb_get_max_width(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the MAX_WIDTH register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the maximum supported line width
intel_vvp_vfb_get_max_height
- Prototype
-
uint32_t intel_vvp_vfb_get_max_height(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the MAX_HEIGHT register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the maximum supported frame height
intel_vvp_vfb_is_frame_drop_enabled
- Prototype
-
bool intel_vvp_vfb_is_frame_drop_enabled(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the DROP_ENABLED register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
If frames are dropped for the purpose of frame rate conversion
intel_vvp_vfb_is_frame_repeat_enabled
- Prototype
-
bool intel_vvp_vfb_is_frame_repeat_enabled(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the REPEAT_ENABLED register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
If frames are repeated for the purpose of frame rate conversion
intel_vvp_are_invalid_frames_dropped
- Prototype
-
bool intel_vvp_are_invalid_frames_dropped(intel_vvp_vfb_instance *instance);
- Description
-
Returns the value of the INVALID_FRAMES_DROPPED register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
If detected invalid frames are dropped
intel_vvp_vfb_get_mem_base_address
- Prototype
-
uint32_t intel_vvp_vfb_get_mem_base_address(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the MEM_BASE_ADDR register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the base address of the frame buffers in memory
intel_vvp_vfb_get_buffer_stride
- Prototype
-
uint32_t intel_vvp_vfb_get_buffer_stride(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the MEM_BUFFER_STRIDE register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the stride, in bytes, between two contiguous frame buffers in memory
intel_vvp_vfb_get_line_stride
- Prototype
-
uint32_t intel_vvp_vfb_get_line_stride(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the MEM_LINE_STRIDE register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the stride, in bytes, between two contiguous video lines in a frame buffer in memory
intel_vvp_vfb_get_bits_per_sample
- Prototype
-
uint8_t intel_vvp_vfb_get_bits_per_sample(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the BPS register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the compile-time bits per color sample value
intel_vvp_vfb_get_num_color_planes
- Prototype
-
uint8_t intel_vvp_vfb_get_num_color_planes(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the NUMBER_OF_COLOR_PLANES register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the number of color planes per pixel
intel_vvp_vfb_get_pixels_in_parallel
- Prototype
-
uint8_t intel_vvp_vfb_get_pixels_in_parallel(intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the PIXELS_IN_PARALLEL register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
the number of pixels transmitted in parallel per clock cycle
intel_vvp_vfb_get_mem_word_packing
- Prototype
-
eIntelVvpVfbPacking intel_vvp_vfb_get_mem_ word_packing (intel_vvp_vfb_instance *instance);
- Description
-
Reads and returns the value of the PACKING register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
Arguments instance – pointer to the intel_vvp_vfb_instance software driver instance structure
Returns the method used to pack pixels into memory words
intel_vvp_vfb_is_input_running
- Prototype
-
bool intel_vvp_vfb_is_input_running(intel_vvp_vfb_instance* instance);
- Description
-
Reads and returns the running bit of the INPUT_STATUS register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_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_vfb_get_input_status
- Prototype
-
uint32_t intel_vvp_vfb_get_input_status(intel_vvp_vfb_instance* instance);
- Description
-
Reads the INPUT_STATUS register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the INPUT_STATUS register
intel_vvp_vfb_is_output_running
- Prototype
-
bool intel_vvp_vfb_is_output_running(intel_vvp_vfb_instance* instance);
- Description
-
Reads and returns the running bit of the OUTPUT_STATUS register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
True is the IP is currently reading/producing an output field, false when between two output fields
intel_vvp_vfb_get_output_status
- Prototype
-
uint32_t intel_vvp_vfb_get_output_status(intel_vvp_vfb_instance* instance);
- Description
-
Reads the OUTPUT_STATUS register. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the OUTPUT_STATUS register
intel_vvp_vfb_get_num_input_fields
- Prototype
-
uint32_t intel_vvp_vfb_get_num_input_fields (intel_vvp_vfb_instance* instance);
- Description
-
Reads the NUM_INPUT_FIELDS register. This is the number of fields received and processed on the Frame Buffer input side. The counter is updated at the end of a field. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the NUM_INPUT_FIELDS register
intel_vvp_vfb_get_num_dropped_fields
- Prototype
-
uint32_t intel_vvp_vfb_get_num_dropped_fields (intel_vvp_vfb_instance* instance);
- Description
-
Reads the NUM_DROPPED_FIELDS register. This is the number of fields received and dropped on the Frame Buffer input side. The counter is updated when the decision to drop the field is made at the start of the next input field. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the NUM_ DROPPED _FIELDS register
intel_vvp_vfb_get_num_invalid_fields
- Prototype
-
uint32_t intel_vvp_vfb_get_num_invalid_fields(intel_vvp_vfb_instance* instance);
- Description
-
Reads the NUM_INVALID_FIELDS register. This is the number of fields detected as invalid on the Frame Buffer input side. The counter is updated at the end of a field. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the NUM_INVALID_FIELDS register
intel_vvp_vfb_get_num_output_fields
- Prototype
-
uint32_t intel_vvp_vfb_get_num_output_fields (intel_vvp_vfb_instance* instance);
- Description
-
Reads the NUM_OUTPUT_FIELDS register. This is the total number of fields sent on the Frame Buffer output side. The counter is updated at the end of each output field, including repeats. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the NUM_OUTPUT_FIELDS register
intel_vvp_vfb_get_num_repeated_fields
- Prototype
-
uint32_t intel_vvp_vfb_get_num_repeated_fields (intel_vvp_vfb_instance* instance);
- Description
-
Reads the NUM_REPEATED_FIELDS register. This is the number of repeats on the Frame Buffer output side. If a single field is sent five times, the counter for the number of output fields increases by five whereas the counter for the number of repeated fields increases by four. The counter increments at the end of each repeated fields. The instance must be a valid intel_vvp_vfb_instance fully initialized.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
The content of the NUM_REPEATED_FIELDS register
intel_vvp_vfb_output_enable
- Prototype
-
int intel_vvp_vfb_output_enable(intel_vvp_vfb_instance* instance, bool enabled);
- Description
-
Starts/stops the output side of the Frame Buffer. The instance must be a valid intel_vvp_vfb_instance fully initialized. Note that, if dropping fields is not enabled, stopping the output causes backpressure at the input.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
enabled – true to start the output, false to stop it
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error
intel_vvp_vfb_is_output_enabled
- Prototype
-
bool intel_vvp_vfb_is_output_enabled(intel_vvp_vfb_instance* instance);
- Description
-
Starts and stops the output side of the Frame Buffer. The instance must be a valid intel_vvp_vfb_instance fully initialized and configured in debug mode.
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
enabled – true to start the output, false to stop it
- Returns
-
kIntelVvpCoreOk (0) or a negative error code in case of error
intel_vvp_vfb_start_output
- Prototype
-
int intel_vvp_vfb_start_output(intel_vvp_vfb_instance* instance);
- Description
-
Starts the output side of the Frame Buffer. The instance must be a valid intel_vvp_vfb_instance fully initialized. Note that, if dropping fields is not enabled, stopping the output causes backpressure at the input. This is an alias for intel_vvp_vfb_output_enable (instance, true)
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error
intel_vvp_vfb_stop_output
- Prototype
-
int intel_vvp_vfb_stop_output(intel_vvp_vfb_instance* instance);
- Description
-
Starts the output side of the Frame Buffer. The instance must be a valid intel_vvp_vfb_instance fully initialized. Note that, if dropping fields is not enabled, stopping the output causes backpressure at the input. This is an alias for intel_vvp_vfb_output_enable (instance, false)
- Arguments
-
instance – pointer to the intel_vvp_vfb_instance software driver instance structure
- Returns
-
kIntelVvpCoreOk or a negative error code in case of error