Wav2Vec2 (#9659)

* add raw scaffold

* implement feat extract layers

* make style

* remove +

* correctly convert weights

* make feat extractor work

* make feature extraction proj work

* run forward pass

* finish forward pass

* Succesful decoding example

* remove unused files

* more changes

* add wav2vec tokenizer

* add new structure

* fix run forward

* add other layer norm architecture

* finish 2nd structure

* add model tests

* finish tests for tok and model

* clean-up

* make style

* finish docstring for model and config

* make style

* correct docstring

* correct tests

* change checkpoints to fairseq

* fix examples

* finish wav2vec2

* make style

* apply sylvains suggestions

* apply lysandres suggestions

* change print to log.info

* re-add assert statement

* add input_values as required input name

* finish wav2vec2 tokenizer

* Update tests/test_tokenization_wav2vec2.py

Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

* apply sylvains suggestions

Co-authored-by: Lysandre Debut <lysandre@huggingface.co>

src/transformers/dependency_versions_table.py

@@ -36,6 +36,7 @@ deps = {
     "sacremoses": "sacremoses",
     "scikit-learn": "scikit-learn",
     "sentencepiece": "sentencepiece==0.1.91",
+    "soundfile": "soundfile",
     "sphinx-copybutton": "sphinx-copybutton",
     "sphinx-markdown-tables": "sphinx-markdown-tables",
     "sphinx-rtd-theme": "sphinx-rtd-theme==0.4.3",