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from pyglet.util import CodecRegistry, Decoder, Encoder
from .base import *
import pyglet
_debug = pyglet.options['debug_media']
registry = CodecRegistry()
add_decoders = registry.add_decoders
add_encoders = registry.add_encoders
get_decoders = registry.get_decoders
get_encoders = registry.get_encoders
class MediaDecoder(Decoder):
def decode(self, filename, file, streaming):
"""Read the given file object and return an instance of `Source`
or `StreamingSource`.
Throws DecodeException if there is an error. `filename`
can be a file type hint.
"""
raise NotImplementedError()
class MediaEncoder(Encoder):
def encode(self, source, filename, file):
"""Encode the given source to the given file. `filename`
provides a hint to the file format desired. options are
encoder-specific, and unknown options should be ignored or
issue warnings.
"""
raise NotImplementedError()
def add_default_codecs():
# Add all bundled codecs. These should be listed in order of
# preference. This is called automatically by pyglet.media.
try:
from . import wave
registry.add_decoders(wave)
registry.add_encoders(wave)
except ImportError:
pass
if pyglet.compat_platform.startswith('linux'):
try:
from . import gstreamer
registry.add_decoders(gstreamer)
except ImportError:
pass
try:
if pyglet.compat_platform in ('win32', 'cygwin'):
from pyglet.libs.win32.constants import WINDOWS_VISTA_OR_GREATER
if WINDOWS_VISTA_OR_GREATER: # Supports Vista and above.
from . import wmf
registry.add_decoders(wmf)
except ImportError:
pass
try:
if have_ffmpeg():
from . import ffmpeg
registry.add_decoders(ffmpeg)
except ImportError:
pass
try:
from . import pyogg
registry.add_decoders(pyogg)
except ImportError:
pass
def have_ffmpeg():
"""Check if FFmpeg library is available.
Returns:
bool: True if FFmpeg is found.
.. versionadded:: 1.4
"""
try:
from . import ffmpeg_lib
if _debug:
print('FFmpeg available, using to load media files. Versions: {}'.format(ffmpeg_lib.compat.versions))
return True
except (ImportError, FileNotFoundError, AttributeError):
if _debug:
print('FFmpeg not available.')
return False
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