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#!/usr/bin/env python3
import os
import subprocess
import sys
if len(sys.argv) != 2:
print("usage: gen-cta-vic.py <CTA-861-H PDF>", file=sys.stderr)
sys.exit(1)
in_path = sys.argv[1]
in_basename = os.path.basename(in_path)
tool_dir = os.path.dirname(os.path.realpath(__file__))
out_path = tool_dir + "/../cta-vic-table.c"
# Page numbers for CTA-861-H
pages = {
"timing": (41, 43),
"sync": (44, 46),
"aspect_ratio": (55, 58),
}
def extract_pages(page_range):
pages = []
page = ""
cmd = ["pdftotext", "-f", str(page_range[0]), "-l", str(page_range[1]), "-layout", in_path, "-"]
for l in subprocess.check_output(cmd, text=True):
if l.startswith("\f"):
pages.append(page)
page = l[1:]
else:
page += l
return pages
def extract_table(page):
lines = [l.strip() for l in page.splitlines()]
rows = []
for l in lines:
fields = [field.strip() for field in l.split(" ") if field != ""]
rows.append(fields)
return rows
def parse_vic_list(s):
return [int(vic.strip()) for vic in s.split(",")]
def parse_hactive(s):
# Some hactive pixel values have a footnote marker
if s == "14402" or s == "28802":
s = s[:-1]
return int(s)
def parse_interlaced(s):
if s == "Prog":
return "false"
elif s == "Int":
return "true"
else:
assert(False)
def parse_timing_table(page, format_table):
assert("Table 1 - Video Format Timings — Detailed Timing Information" in page)
for fields in extract_table(page):
if len(fields) != 11 or fields[0] == "VIC":
continue
for vic in parse_vic_list(fields[0]):
format_table[vic] = {
"vic": vic,
"h_active": parse_hactive(fields[1]),
"v_active": int(fields[2]),
"interlaced": parse_interlaced(fields[3]),
"pixel_clock_hz": int(float(fields[10]) * 1000 * 1000),
}
def parse_polarity(pol):
if pol == "P":
return "POSITIVE"
elif pol == "N":
return "NEGATIVE"
else:
assert(False)
def parse_sync_table(page, format_table):
assert("Table 2 - Video Format Timings — Detailed Sync Information" in page)
for fields in extract_table(page):
if len(fields) < 12:
continue
for vic in parse_vic_list(fields[0]):
fmt = format_table[vic]
fmt["h_front"] = int(fields[2])
fmt["h_sync"] = int(fields[3])
fmt["h_back"] = int(fields[4])
fmt["h_sync_polarity"] = "DI_CTA_VIDEO_FORMAT_SYNC_" + parse_polarity(fields[5])
fmt["v_front"] = int(fields[6])
fmt["v_sync"] = int(fields[7])
fmt["v_back"] = int(fields[8])
fmt["v_sync_polarity"] = "DI_CTA_VIDEO_FORMAT_SYNC_" + parse_polarity(fields[9])
def parse_aspect_ratio_table(page, format_table):
assert("Table 3 - Video Formats — Video ID Code and Aspect Ratios" in page)
for fields in extract_table(page):
if len(fields) != 5:
continue
vic = int(fields[0])
fmt = format_table[vic]
pic_ar = fields[3]
if pic_ar == "64:276":
# 64:27 has a footnote
pic_ar = pic_ar[:-1]
fmt["picture_aspect_ratio"] = "DI_CTA_VIDEO_FORMAT_PICTURE_ASPECT_RATIO_" + pic_ar.replace(":", "_")
format_table = {}
for page in extract_pages(pages["timing"]):
parse_timing_table(page, format_table)
for page in extract_pages(pages["sync"]):
parse_sync_table(page, format_table)
for page in extract_pages(pages["aspect_ratio"]):
parse_aspect_ratio_table(page, format_table)
max_vic = 0
for vic in format_table:
if vic > max_vic:
max_vic = vic
# Sanity check
for vic in format_table:
fmt = format_table[vic]
assert("h_sync" in fmt)
assert("picture_aspect_ratio" in fmt)
with open(out_path, "w+") as f:
f.write("/* DO NOT EDIT! This file has been generated by gen-cta-vic.py from {}. */\n\n".format(in_basename))
f.write('#include "cta.h"\n\n')
f.write("const struct di_cta_video_format _di_cta_video_formats[] = {\n")
for vic in format_table:
f.write("\t[{}] = {{\n".format(vic))
for k, v in format_table[vic].items():
f.write("\t\t.{} = {},\n".format(k, v))
f.write("\t},\n")
f.write("};\n\n")
f.write("const size_t _di_cta_video_formats_len = {};\n".format(max_vic + 1))
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