91 lines
2.7 KiB
Python
91 lines
2.7 KiB
Python
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from enum import IntEnum
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class Timing:
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"""
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Class `Timing` contains information about Timing: all resolutions, timing id, frame rate, `AspectRatio`,
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`Standard`, `ReduceBlanking`.
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"""
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class Standard(IntEnum):
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"""
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Class `Standard` contains all possible variants of timing standards.
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"""
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SD_NONE = 0
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SD_CVT = 1
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SD_DMT = 2
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SD_CTA = 3
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SD_UGF = 4
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SD_OVT = 5
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class AspectRatio(IntEnum):
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"""
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Class `AspectRatio` contains all possible variants of timing aspect ratio.
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"""
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AR_NONE = 0
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AR_4_3 = 1
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AR_16_9 = 2
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class ReduceBlanking(IntEnum):
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"""
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Class `ReduceBlanking` contains all possible variants of timing reduce blanking.
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"""
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RB_NONE = 0
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RB1 = 1
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RB2 = 2
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RB3 = 3
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def __init__(self):
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self.frame_rate = 0.0
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self.hactive = 0
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self.vactive = 0
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self.htotal = 0
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self.vtotal = 0
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self.hstart = 0
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self.vstart = 0
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self.hswidth = 0
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self.vswidth = 0
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self.id = 0
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self.aspect_ratio = self.AspectRatio.AR_NONE
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self.standard = self.Standard.SD_NONE
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self.reduce_blanking = self.ReduceBlanking.RB_NONE
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def __str__(self):
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return f"{self.frame_rate / 1000:03} " \
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f"{self.htotal} {self.hstart} {self.hactive} {self.hswidth:+} " \
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f"{self.vtotal} {self.vstart} {self.vactive} {self.vswidth:+}"
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def __eq__(self, other) -> bool:
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return self.hactive == other.hactive and self.vactive == other.vactive and self.htotal == other.htotal and \
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self.vtotal == other.vtotal and self.hstart == other.hstart and self.vstart == other.vstart and \
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self.hswidth == other.hswidth and self.vswidth == other.vswidth
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def is_valid(self) -> bool:
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"""
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Check that timing is correct (Resolutions and frame rate more than 0)
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Returns:
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is valid (bool) - valid (True) or not (False)
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"""
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return self.hactive > 0 and \
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self.vactive > 0 and \
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self.htotal > 0 and \
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self.vtotal > 0 and \
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self.hstart > 0 and \
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self.vstart > 0 and \
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self.frame_rate > 0
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@property
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def pixel_clock(self) -> float:
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"""
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Returns calculated pixel clock required for this video mode in MHz. 0.0 if video mode is not valid.
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Returns:
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pixel clock (float)
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"""
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if self.is_valid():
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return round(self.htotal * self.vtotal * self.frame_rate / 1000000000.0, 3)
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else:
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return 0.0
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