kopia lustrzana https://github.com/dnet/pySSTV
153 wiersze
4.0 KiB
Python
153 wiersze
4.0 KiB
Python
#!/usr/bin/env python
|
|
|
|
from __future__ import division
|
|
from pysstv.sstv import byte_to_freq, FREQ_BLACK, FREQ_WHITE, FREQ_VIS_START
|
|
from pysstv.grayscale import GrayscaleSSTV
|
|
from itertools import chain
|
|
from enum import Enum
|
|
|
|
|
|
class Color(Enum):
|
|
red = 0
|
|
green = 1
|
|
blue = 2
|
|
|
|
class ColorSSTV(GrayscaleSSTV):
|
|
def on_init(self):
|
|
self.pixels = self.image.load()
|
|
|
|
def encode_line(self, line):
|
|
msec_pixel = self.SCAN / self.WIDTH
|
|
image = self.pixels
|
|
for color in self.COLOR_SEQ:
|
|
yield from self.before_channel(color)
|
|
for col in range(self.WIDTH):
|
|
pixel = image[col, line]
|
|
freq_pixel = byte_to_freq(pixel[color.value])
|
|
yield freq_pixel, msec_pixel
|
|
yield from self.after_channel(color)
|
|
|
|
def before_channel(self, color):
|
|
return []
|
|
|
|
after_channel = before_channel
|
|
|
|
|
|
class MartinM1(ColorSSTV):
|
|
COLOR_SEQ = (Color.green, Color.blue, Color.red)
|
|
VIS_CODE = 0x2c
|
|
WIDTH = 320
|
|
HEIGHT = 256
|
|
SYNC = 4.862
|
|
SCAN = 146.432
|
|
INTER_CH_GAP = 0.572
|
|
|
|
def before_channel(self, color):
|
|
if color is Color.green:
|
|
yield FREQ_BLACK, self.INTER_CH_GAP
|
|
|
|
def after_channel(self, color):
|
|
yield FREQ_BLACK, self.INTER_CH_GAP
|
|
|
|
|
|
class MartinM2(MartinM1):
|
|
VIS_CODE = 0x28
|
|
WIDTH = 160
|
|
SCAN = 73.216
|
|
|
|
|
|
class ScottieS1(MartinM1):
|
|
VIS_CODE = 0x3c
|
|
SYNC = 9
|
|
INTER_CH_GAP = 1.5
|
|
SCAN = 138.24 - INTER_CH_GAP
|
|
|
|
def horizontal_sync(self):
|
|
return []
|
|
|
|
def before_channel(self, color):
|
|
if color is Color.red:
|
|
yield from MartinM1.horizontal_sync(self)
|
|
yield FREQ_BLACK, self.INTER_CH_GAP
|
|
|
|
|
|
class ScottieS2(ScottieS1):
|
|
VIS_CODE = 0x38
|
|
SCAN = 88.064 - ScottieS1.INTER_CH_GAP
|
|
WIDTH = 160
|
|
|
|
|
|
class Robot36(ColorSSTV):
|
|
VIS_CODE = 0x08
|
|
WIDTH = 320
|
|
HEIGHT = 240
|
|
SYNC = 9
|
|
INTER_CH_GAP = 4.5
|
|
Y_SCAN = 88
|
|
C_SCAN = 44
|
|
PORCH = 1.5
|
|
SYNC_PORCH = 3
|
|
INTER_CH_FREQS = [None, FREQ_BLACK, FREQ_WHITE]
|
|
|
|
def on_init(self):
|
|
self.yuv = self.image.convert('YCbCr').load()
|
|
|
|
def encode_line(self, line):
|
|
pixels = [self.yuv[col, line] for col in range(self.WIDTH)]
|
|
channel = (line % 2) + 1
|
|
y_pixel_time = self.Y_SCAN / self.WIDTH
|
|
uv_pixel_time = self.C_SCAN / self.WIDTH
|
|
return chain(
|
|
[(FREQ_BLACK, self.SYNC_PORCH)],
|
|
((byte_to_freq(p[0]), y_pixel_time) for p in pixels),
|
|
[(self.INTER_CH_FREQS[channel], self.INTER_CH_GAP),
|
|
(FREQ_VIS_START, self.PORCH)],
|
|
((byte_to_freq(p[channel]), uv_pixel_time) for p in pixels))
|
|
|
|
|
|
class PasokonP3(ColorSSTV):
|
|
"""
|
|
[ VIS code or horizontal sync here ]
|
|
Back porch - 5 time units of black (1500 Hz).
|
|
Red component - 640 pixels of 1 time unit each.
|
|
Gap - 5 time units of black.
|
|
Green component - 640 pixels of 1 time unit each.
|
|
Gap - 5 time units of black.
|
|
Blue component - 640 pixels of 1 time unit each.
|
|
Front porch - 5 time units of black.
|
|
Horizontal Sync - 25 time units of 1200 Hz.
|
|
"""
|
|
TIMEUNIT = 1000/4800. # ms
|
|
COLOR_SEQ = (Color.red, Color.green, Color.blue)
|
|
VIS_CODE = 0x71
|
|
WIDTH = 640
|
|
HEIGHT = 480+16
|
|
SYNC = 25 * TIMEUNIT
|
|
SCAN = WIDTH * TIMEUNIT
|
|
INTER_CH_GAP = 5 * TIMEUNIT
|
|
|
|
def before_channel(self, color):
|
|
if color is Color.red:
|
|
yield FREQ_BLACK, self.INTER_CH_GAP
|
|
|
|
def after_channel(self, color):
|
|
yield FREQ_BLACK, self.INTER_CH_GAP
|
|
|
|
|
|
class PasokonP5(PasokonP3):
|
|
TIMEUNIT = 1000/3200. # ms
|
|
VIS_CODE = 0x72
|
|
SYNC = 25 * TIMEUNIT
|
|
SCAN = PasokonP3.WIDTH * TIMEUNIT
|
|
INTER_CH_GAP = 5 * TIMEUNIT
|
|
|
|
class PasokonP7(PasokonP3):
|
|
TIMEUNIT = 1000/2400. # ms
|
|
VIS_CODE = 0xF3
|
|
SYNC = 25 * TIMEUNIT
|
|
SCAN = PasokonP3.WIDTH * TIMEUNIT
|
|
INTER_CH_GAP = 5 * TIMEUNIT
|
|
|
|
|
|
MODES = (MartinM1, MartinM2, ScottieS1, ScottieS2, Robot36, PasokonP3, PasokonP5, PasokonP7)
|