171 lines
5.3 KiB
Cython
171 lines
5.3 KiB
Cython
cimport libav as lib
|
|
|
|
|
|
def _flatten(input_):
|
|
for x in input_:
|
|
if isinstance(x, (tuple, list)):
|
|
for y in _flatten(x):
|
|
yield y
|
|
else:
|
|
yield x
|
|
|
|
cdef lib.AVMediaType _get_media_type_enum(str type):
|
|
if type == "video":
|
|
return lib.AVMEDIA_TYPE_VIDEO
|
|
elif type == "audio":
|
|
return lib.AVMEDIA_TYPE_AUDIO
|
|
elif type == "subtitle":
|
|
return lib.AVMEDIA_TYPE_SUBTITLE
|
|
elif type == "attachment":
|
|
return lib.AVMEDIA_TYPE_ATTACHMENT
|
|
elif type == "data":
|
|
return lib.AVMEDIA_TYPE_DATA
|
|
else:
|
|
raise ValueError(f"Invalid stream type: {type}")
|
|
|
|
cdef class StreamContainer:
|
|
"""
|
|
|
|
A tuple-like container of :class:`Stream`.
|
|
|
|
::
|
|
|
|
# There are a few ways to pulling out streams.
|
|
first = container.streams[0]
|
|
video = container.streams.video[0]
|
|
audio = container.streams.get(audio=(0, 1))
|
|
|
|
|
|
"""
|
|
|
|
def __cinit__(self):
|
|
self._streams = []
|
|
self.video = ()
|
|
self.audio = ()
|
|
self.subtitles = ()
|
|
self.data = ()
|
|
self.attachments = ()
|
|
self.other = ()
|
|
|
|
cdef add_stream(self, Stream stream):
|
|
|
|
assert stream.ptr.index == len(self._streams)
|
|
self._streams.append(stream)
|
|
|
|
if stream.ptr.codecpar.codec_type == lib.AVMEDIA_TYPE_VIDEO:
|
|
self.video = self.video + (stream, )
|
|
elif stream.ptr.codecpar.codec_type == lib.AVMEDIA_TYPE_AUDIO:
|
|
self.audio = self.audio + (stream, )
|
|
elif stream.ptr.codecpar.codec_type == lib.AVMEDIA_TYPE_SUBTITLE:
|
|
self.subtitles = self.subtitles + (stream, )
|
|
elif stream.ptr.codecpar.codec_type == lib.AVMEDIA_TYPE_ATTACHMENT:
|
|
self.attachments = self.attachments + (stream, )
|
|
elif stream.ptr.codecpar.codec_type == lib.AVMEDIA_TYPE_DATA:
|
|
self.data = self.data + (stream, )
|
|
else:
|
|
self.other = self.other + (stream, )
|
|
|
|
# Basic tuple interface.
|
|
def __len__(self):
|
|
return len(self._streams)
|
|
|
|
def __iter__(self):
|
|
return iter(self._streams)
|
|
|
|
def __getitem__(self, index):
|
|
if isinstance(index, int):
|
|
return self.get(index)[0]
|
|
else:
|
|
return self.get(index)
|
|
|
|
def get(self, *args, **kwargs):
|
|
"""get(streams=None, video=None, audio=None, subtitles=None, data=None)
|
|
|
|
Get a selection of :class:`.Stream` as a ``list``.
|
|
|
|
Positional arguments may be ``int`` (which is an index into the streams),
|
|
or ``list`` or ``tuple`` of those::
|
|
|
|
# Get the first channel.
|
|
streams.get(0)
|
|
|
|
# Get the first two audio channels.
|
|
streams.get(audio=(0, 1))
|
|
|
|
Keyword arguments (or dicts as positional arguments) as interpreted
|
|
as ``(stream_type, index_value_or_set)`` pairs::
|
|
|
|
# Get the first video channel.
|
|
streams.get(video=0)
|
|
# or
|
|
streams.get({'video': 0})
|
|
|
|
:class:`.Stream` objects are passed through untouched.
|
|
|
|
If nothing is selected, then all streams are returned.
|
|
|
|
"""
|
|
|
|
selection = []
|
|
|
|
for x in _flatten((args, kwargs)):
|
|
if x is None:
|
|
pass
|
|
|
|
elif isinstance(x, Stream):
|
|
selection.append(x)
|
|
|
|
elif isinstance(x, int):
|
|
selection.append(self._streams[x])
|
|
|
|
elif isinstance(x, dict):
|
|
for type_, indices in x.items():
|
|
if type_ == "streams": # For compatibility with the pseudo signature
|
|
streams = self._streams
|
|
else:
|
|
streams = getattr(self, type_)
|
|
if not isinstance(indices, (tuple, list)):
|
|
indices = [indices]
|
|
for i in indices:
|
|
selection.append(streams[i])
|
|
|
|
else:
|
|
raise TypeError("Argument must be Stream or int.", type(x))
|
|
|
|
return selection or self._streams[:]
|
|
|
|
cdef int _get_best_stream_index(self, Container container, lib.AVMediaType type_enum, Stream related) noexcept:
|
|
cdef int stream_index
|
|
|
|
if related is None:
|
|
stream_index = lib.av_find_best_stream(container.ptr, type_enum, -1, -1, NULL, 0)
|
|
else:
|
|
stream_index = lib.av_find_best_stream(container.ptr, type_enum, -1, related.ptr.index, NULL, 0)
|
|
|
|
return stream_index
|
|
|
|
def best(self, str type, /, Stream related = None):
|
|
"""best(type: Literal["video", "audio", "subtitle", "attachment", "data"], /, related: Stream | None)
|
|
Finds the "best" stream in the file. Wraps :ffmpeg:`av_find_best_stream`. Example::
|
|
|
|
stream = container.streams.best("video")
|
|
|
|
:param type: The type of stream to find
|
|
:param related: A related stream to use as a reference (optional)
|
|
:return: The best stream of the specified type
|
|
:rtype: Stream | None
|
|
"""
|
|
cdef type_enum = _get_media_type_enum(type)
|
|
|
|
if len(self._streams) == 0:
|
|
return None
|
|
|
|
cdef container = self._streams[0].container
|
|
|
|
cdef int stream_index = self._get_best_stream_index(container, type_enum, related)
|
|
|
|
if stream_index < 0:
|
|
return None
|
|
|
|
return self._streams[stream_index]
|