64 lines
2.2 KiB
Python
64 lines
2.2 KiB
Python
from collections import namedtuple
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CustomField = namedtuple("CustomField", "fields removals")
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# Versions of the loaded libraries
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versions = {
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'avcodec': 0,
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'avformat': 0,
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'avutil': 0,
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'swresample': 0,
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'swscale': 0,
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}
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# Group codecs by version they are usually packaged with.
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release_versions = [
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{'avcodec': 58, 'avformat': 58, 'avutil': 56, 'swresample': 3, 'swscale': 5},
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{'libavcodec': 59, 'avformat': 59, 'avutil': 57, 'swresample': 4, 'swscale': 6}
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]
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# Removals done per library and version.
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_version_changes = {
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'avcodec': {},
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'avformat': {},
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'avutil': {},
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'swresample': {},
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'swscale': {}
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}
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def set_version(library, version):
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versions[library] = version
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def add_version_changes(library, version, structure, fields, removals):
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if version not in _version_changes[library]:
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_version_changes[library][version] = {}
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if structure in _version_changes[library][version]:
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raise Exception("Structure: {} from: {} has already been added for version {}.".format(structure,
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library,
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version)
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)
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_version_changes[library][version][structure] = CustomField(fields, removals)
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def apply_version_changes():
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"""Apply version changes to Structures in FFmpeg libraries.
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Field data can vary from version to version, however assigning _fields_ automatically assigns memory.
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_fields_ can also not be re-assigned. Use a temporary list that can be manipulated before setting the
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_fields_ of the Structure."""
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for library, data in _version_changes.items():
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for version in data:
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for structure, cf_data in _version_changes[library][version].items():
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if versions[library] == version:
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if cf_data.removals:
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for remove_field in cf_data.removals:
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for field in list(cf_data.fields):
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if field[0] == remove_field:
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cf_data.fields.remove(field)
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structure._fields_ = cf_data.fields
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