127 lines
4.0 KiB
Python
127 lines
4.0 KiB
Python
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# ----------------------------------------------------------------------------
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# pyglet
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# Copyright (c) 2006-2008 Alex Holkner
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# Copyright (c) 2008-2020 pyglet contributors
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in
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# the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of pyglet nor the names of its
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# contributors may be used to endorse or promote products
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# derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# ----------------------------------------------------------------------------
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from pyglet.util import Codecs, Decoder, Encoder
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from .base import *
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import pyglet
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_debug = pyglet.options['debug_media']
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_codecs = Codecs()
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add_decoders = _codecs.add_decoders
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get_decoders = _codecs.get_decoders
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add_encoders = _codecs.add_encoders
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get_encoders = _codecs.get_encoders
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class MediaDecoder(Decoder):
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def decode(self, file, filename, streaming):
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"""Read the given file object and return an instance of `Source`
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or `StreamingSource`.
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Throws MediaDecodeException if there is an error. `filename`
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can be a file type hint.
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"""
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raise NotImplementedError()
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class MediaEncoder(Encoder):
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def encode(self, source, file, filename):
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"""Encode the given source to the given file. `filename`
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provides a hint to the file format desired. options are
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encoder-specific, and unknown options should be ignored or
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issue warnings.
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"""
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raise NotImplementedError()
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def add_default_media_codecs():
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# Add all bundled codecs. These should be listed in order of
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# preference. This is called automatically by pyglet.media.
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try:
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from . import wave
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add_decoders(wave)
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add_encoders(wave)
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except ImportError:
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pass
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if pyglet.compat_platform.startswith('linux'):
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try:
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from . import gstreamer
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add_decoders(gstreamer)
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except ImportError:
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pass
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try:
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if pyglet.compat_platform in ('win32', 'cygwin'):
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from pyglet.libs.win32.constants import WINDOWS_VISTA_OR_GREATER
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if WINDOWS_VISTA_OR_GREATER: # Supports Vista and above.
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from . import wmf
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add_decoders(wmf)
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except ImportError:
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pass
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try:
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if have_ffmpeg():
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from . import ffmpeg
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add_decoders(ffmpeg)
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except ImportError:
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pass
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def have_ffmpeg():
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"""Check if FFmpeg library is available.
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Returns:
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bool: True if FFmpeg is found.
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.. versionadded:: 1.4
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"""
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try:
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from . import ffmpeg_lib
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if _debug:
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print('FFmpeg available, using to load media files.')
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return True
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except (ImportError, FileNotFoundError):
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if _debug:
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print('FFmpeg not available.')
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return False
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