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bazarr/libs/pyprobe/ffprobeparsers.py

217 lines
6.1 KiB

from __future__ import absolute_import
from os import path
from .baseparser import BaseParser
class StreamParser(BaseParser):
@staticmethod
def value_codec(data):
"""Returns a string"""
info = data.get("codec_name", None)
return info, (info or "null")
@staticmethod
def value_format(data):
"""Returns a string"""
info = data.get("format_name", None)
return info, (info or "null")
@staticmethod
def value_bit_rate(data):
"""Returns an int"""
info = data.get("bit_rate", None)
try:
return info, int(float(info))
except (ValueError, TypeError):
return info, 0
class VideoStreamParser(BaseParser):
@staticmethod
def value_codec(data):
return StreamParser.value_codec(data)
@staticmethod
def value_format(data):
return StreamParser.value_format(data)
@staticmethod
def value_bit_rate(data):
return StreamParser.value_bit_rate(data)
@staticmethod
def value_resolution(data):
"""Returns a tuple (width, height)"""
width = data.get("width", None)
height = data.get("height", None)
if width is None and height is None:
return None, (0, 0)
try:
return (width, height), (int(float(width)), int(float(height)))
except (ValueError, TypeError):
return (width, height), (0, 0)
@staticmethod
def average_framerate(data):
"""Returns an int"""
frames = data.get("nb_frames", None)
duration = data.get("duration", None)
try:
return float(frames) / float(duration)
except (ValueError, TypeError, ZeroDivisionError):
return 0.0
@classmethod
def value_framerate(cls, data):
"""Returns a float"""
input_str = data.get("avg_frame_rate", None)
try:
num, den = input_str.split("/")
return input_str, round(float(num) / float(den), 3)
except (ValueError, ZeroDivisionError, AttributeError):
info = cls.average_framerate(data)
return input_str, info
@staticmethod
def value_aspect_ratio(data):
"""Returns a string"""
info = data.get("display_aspect_ratio", None)
return info, (info or "null")
@staticmethod
def value_pixel_format(data):
"""Returns a string"""
info = data.get("pix_fmt", None)
return info, (info or "null")
class AudioStreamParser(StreamParser):
@staticmethod
def value_sample_rate(data):
"""Returns an int - audio sample rate in Hz"""
info = data.get("sample_rate", None)
try:
return info, int(float(info))
except (ValueError, TypeError):
return info, 0
@staticmethod
def value_channel_count(data):
"""Returns an int"""
info = data.get("channels", None)
try:
return info, int(float(info))
except (ValueError, TypeError):
return info, 0
@staticmethod
def value_channel_layout(data):
"""Returns a string"""
info = data.get("channel_layout", None)
return info, (info or "null")
class SubtitleStreamParser(BaseParser):
@staticmethod
def value_codec(data):
return StreamParser.value_codec(data)
@staticmethod
def value_language(data):
"""Returns a string """
tags = data.get("tags", None)
if tags:
info = tags.get("language", None)
return info, (info or "null")
return None, "null"
@staticmethod
def value_forced(data):
"""Returns a bool """
disposition = data.get("disposition", None)
if disposition:
info = disposition.get("forced", None)
return bool(info), (bool(info) or False)
return None, "null"
class ChapterParser(BaseParser):
@staticmethod
def value_start(data):
"""Returns an int"""
info = data.get("start_time", None)
try:
return info, float(data.get("start_time"))
except (ValueError, TypeError):
return info, 0
@classmethod
def value_end(cls, data):
"""Returns a float"""
info = data.get("end_time", None)
try:
return info, float(info)
except (ValueError, TypeError):
return info, 0
@staticmethod
def value_title(data):
"""Returns a string"""
info = data.get("tags", {}).get("title", None)
return info, (info or "null")
@staticmethod
def fillEmptyTitles(chapters):
"""Add text in place of empty titles
If a chapter doesn't have a title, this will add a basic
string in the form "Chapter `index+1`"
Args:
chapters(list<dict>): The list of parsed chapters
"""
index = 0
for chapter in chapters:
if not chapter["title"]:
chapter["title"] = "Chapter " + str(index)
index += 1
class RootParser(BaseParser):
@staticmethod
def value_duration(data):
"""Returns an int"""
info = data.get("duration", None)
try:
return info, float(info)
except (ValueError, TypeError):
return info, 0.0
@staticmethod
def value_size(data):
"""Returns an int"""
info = data.get("size", None)
if info is None:
file_path = data.get("filename", "")
if path.isfile(file_path):
info = str(path.getsize(file_path))
try:
return info, int(float(info))
except (ValueError, TypeError):
return info, 0
@classmethod
def value_bit_rate(cls, data):
"""Returns an int"""
info = data.get("bit_rate", None)
if info is None:
_, size = cls.value_size(data)
_, duration = cls.value_duration(data)
if size and duration:
info = size / (duration / 60 * 0.0075) / 1000
try:
return info, int(float(info))
except (ValueError, TypeError):
return info, 0