# Copyright (c) 2018, Xilinx, Inc.
# SPDX-License-Identifier: BSD-3-Clause
import warnings
from pynq import DefaultHierarchy
from pynq.ps import CPU_ARCH, ZYNQ_ARCH
from .common import *
from .frontend import VideoInFrontend, VideoOutFrontend
[docs]class HDMIInFrontend(VideoInFrontend, DefaultHierarchy):
"""Class for interacting the with HDMI input frontend
This class is used for enabling the HDMI input and retrieving
the mode of the incoming video
Attributes
----------
mode : VideoMode
The detected mode of the incoming video stream
"""
def __init__(self, description):
super().__init__(description)
[docs] def start(self, init_timeout=60):
"""Method that blocks until the video mode is
successfully detected
"""
import pynq.lib._video
ip_dict = self.description
gpio_description = ip_dict["ip"]["axi_gpio_hdmiin"]
gpio_dict = {
"BASEADDR": gpio_description["phys_addr"],
"INTERRUPT_PRESENT": 1,
"IS_DUAL": 1,
}
vtc_description = ip_dict["ip"]["vtc_in"]
vtc_capture_addr = vtc_description["phys_addr"]
self._capture = pynq.lib._video._capture(
gpio_dict, vtc_capture_addr, init_timeout
)
[docs] def stop(self):
"""Currently empty function included for symmetry with
the HDMIOutFrontend class
"""
pass
[docs] @staticmethod
def checkhierarchy(description):
return "vtc_in" in description["ip"] and "axi_gpio_hdmiin" in description["ip"]
@property
def mode(self):
return VideoMode(self._capture.frame_width(), self._capture.frame_height(), 24)
_outputmodes = {
(640, 480): 0,
(800, 600): 1,
(1280, 720): 2,
(1280, 1024): 3,
(1920, 1080): 4,
}
[docs]class HDMIOutFrontend(VideoOutFrontend, DefaultHierarchy):
"""Class for interacting the HDMI output frontend
This class is used for enabling the HDMI output and setting
the desired mode of the video stream
Attributes
----------
mode : VideoMode
Desired mode for the output video. Must be set prior
to calling start
"""
[docs] @staticmethod
def checkhierarchy(description):
return "vtc_out" in description["ip"] and "axi_dynclk" in description["ip"]
def __init__(self, description):
"""Create the HDMI output front end
Parameters
----------
vtc_description : dict
The IP dictionary entry for the video timing controller to use
clock_description : dict
The IP dictionary entry for the clock generator to use
"""
import pynq.lib._video
super().__init__(description)
ip_dict = self.description["ip"]
vtc_description = ip_dict["vtc_out"]
clock_description = ip_dict["axi_dynclk"]
vtc_capture_addr = vtc_description["phys_addr"]
clock_addr = clock_description["phys_addr"]
self._display = pynq.lib._video._display(vtc_capture_addr, clock_addr, 1)
self.start = self._display.start
"""Start the HDMI output - requires the that mode is already set"""
self.stop = self._display.stop
"""Stop the HDMI output"""
@property
def mode(self):
"""Get or set the video mode for the HDMI output, must be set to one
of the following resolutions:
640x480
800x600
1280x720
1280x1024
1920x1080
Any other resolution will result in a ValueError being raised.
The bits per pixel will always be 24 when retrieved and ignored
when set.
"""
return VideoMode(self._display.frame_width(), self._display.frame_height(), 24)
@mode.setter
def mode(self, value):
resolution = (value.width, value.height)
if resolution in _outputmodes:
self._display.mode(_outputmodes[resolution])
else:
raise ValueError(
"Invalid Output resolution {}x{}".format(value.width, value.height)
)