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Add cancel handling to streams

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jaseg 2022-04-24 00:01:36 +02:00 • committed by jaseg
parent 677b62cd81
commit bd46633641
1 changed files with 9 additions and 12 deletions
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21
mpv.py
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@ -711,8 +711,8 @@ class _DecoderPropertyProxy(_PropertyProxy):
setattr(self.mpv, _py_to_mpv(name), value)
class GeneratorStream:
"""Transform a python generator into an mpv-compatible stream object. This only supports size() and read(), and
does not support seek(), close() or cancel().
"""Transform a python generator into an mpv-compatible stream object. The total size of the file can be indicated to
mpv using the size argument to __init__. Seeking is not supported.
"""
def __init__(self, generator_fun, size=None):
@ -742,7 +742,6 @@ class GeneratorStream:
def cancel(self):
self._read_iter = iter([]) # make next read() call return EOF
# TODO?
class ImageOverlay:
@ -1746,16 +1745,16 @@ class MPV(object):
return read # non-empty bytes object with input
return b'' # empty byte object signals permanent EOF
def seek(self, pos):
def seek(self, pos): # optional
return new_offset # integer with new byte offset. The new offset may be before the requested offset
in case an exact seek is inconvenient.
def close(self):
def close(self): # optional
...
# def cancel(self): (future API versions only)
# Abort a running read() or seek() operation
# ...
def cancel(self): # optional
Abort a running read() or seek() operation
...
"""
@ -1782,10 +1781,8 @@ class MPV(object):
seek = cb_info.contents.seek = StreamSeekFn(lambda _userdata, offx: frontend.seek(offx))
if hasattr(frontend, 'size') and frontend.size is not None:
size = cb_info.contents.size = StreamSizeFn(lambda _userdata: frontend.size)
# Future API versions only
# if hasattr(frontend, 'cancel'):
# cb_info.contents.cancel = StreamCancelFn(lambda _userdata: frontend.cancel())
if hasattr(frontend, 'cancel'):
cancel = cb_info.contents.cancel = StreamCancelFn(lambda _userdata: frontend.cancel())
# keep frontend and callbacks in memory forever (TODO)
frontend._registered_callbacks = [read, close, seek, size, cancel]