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backend import in child load_model method and expose logfile arg

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Luca 2023-11-03 11:33:03 +01:00
parent f97a253273
commit 18c1434f77
1 changed files with 29 additions and 38 deletions
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67
whisper_online.py
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@ -30,12 +30,8 @@ class ASRBase:
self.transcribe_kargs = {} self.transcribe_kargs = {}
self.original_language = lan self.original_language = lan
self.import_backend()
self.model = self.load_model(modelsize, cache_dir, model_dir) self.model = self.load_model(modelsize, cache_dir, model_dir)
def import_backend(self):
raise NotImplemented("must be implemented in the child class")
def load_model(self, modelsize, cache_dir): def load_model(self, modelsize, cache_dir):
raise NotImplemented("must be implemented in the child class") raise NotImplemented("must be implemented in the child class")
@ -52,15 +48,13 @@ class WhisperTimestampedASR(ASRBase):
""" """
sep = " " sep = " "
def import_backend(self):
global whisper, whisper_timestamped
import whisper
import whisper_timestamped
def load_model(self, modelsize=None, cache_dir=None, model_dir=None): def load_model(self, modelsize=None, cache_dir=None, model_dir=None):
global whisper_timestamped # has to be global as it is used at each `transcribe` call
import whisper
import whisper_timestamped
if model_dir is not None: if model_dir is not None:
print("ignoring model_dir, not implemented",file=self.output) print("ignoring model_dir, not implemented",file=self.logfile)
return whisper.load_model(modelsize, download_root=cache_dir) return whisper.load_model(modelsize, download_root=cache_dir)
def transcribe(self, audio, init_prompt=""): def transcribe(self, audio, init_prompt=""):
@ -89,13 +83,10 @@ class FasterWhisperASR(ASRBase):
sep = "" sep = ""
def import_backend(self):
global faster_whisper
import faster_whisper
def load_model(self, modelsize=None, cache_dir=None, model_dir=None): def load_model(self, modelsize=None, cache_dir=None, model_dir=None):
from faster_whisper import WhisperModel
if model_dir is not None: if model_dir is not None:
print(f"Loading whisper model from model_dir {model_dir}. modelsize and cache_dir parameters are not used.",file=self.output) print(f"Loading whisper model from model_dir {model_dir}. modelsize and cache_dir parameters are not used.",file=self.logfile)
model_size_or_path = model_dir model_size_or_path = model_dir
elif modelsize is not None: elif modelsize is not None:
model_size_or_path = modelsize model_size_or_path = modelsize
@ -143,7 +134,7 @@ class FasterWhisperASR(ASRBase):
class HypothesisBuffer: class HypothesisBuffer:
def __init__(self, output=sys.stderr): def __init__(self, logfile=sys.stderr):
"""output: where to store the log. Leave it unchanged to print to terminal.""" """output: where to store the log. Leave it unchanged to print to terminal."""
self.commited_in_buffer = [] self.commited_in_buffer = []
self.buffer = [] self.buffer = []
@ -152,7 +143,7 @@ class HypothesisBuffer:
self.last_commited_time = 0 self.last_commited_time = 0
self.last_commited_word = None self.last_commited_word = None
self.output = output self.logfile = logfile
def insert(self, new, offset): def insert(self, new, offset):
# compare self.commited_in_buffer and new. It inserts only the words in new that extend the commited_in_buffer, it means they are roughly behind last_commited_time and new in content # compare self.commited_in_buffer and new. It inserts only the words in new that extend the commited_in_buffer, it means they are roughly behind last_commited_time and new in content
@ -172,9 +163,9 @@ class HypothesisBuffer:
c = " ".join([self.commited_in_buffer[-j][2] for j in range(1,i+1)][::-1]) c = " ".join([self.commited_in_buffer[-j][2] for j in range(1,i+1)][::-1])
tail = " ".join(self.new[j-1][2] for j in range(1,i+1)) tail = " ".join(self.new[j-1][2] for j in range(1,i+1))
if c == tail: if c == tail:
print("removing last",i,"words:",file=self.output) print("removing last",i,"words:",file=self.logfile)
for j in range(i): for j in range(i):
print("\t",self.new.pop(0),file=self.output) print("\t",self.new.pop(0),file=self.logfile)
break break
def flush(self): def flush(self):
@ -211,14 +202,14 @@ class OnlineASRProcessor:
SAMPLING_RATE = 16000 SAMPLING_RATE = 16000
def __init__(self, asr, tokenizer, output=sys.stderr): def __init__(self, asr, tokenizer, logfile=sys.stderr):
"""asr: WhisperASR object """asr: WhisperASR object
tokenizer: sentence tokenizer object for the target language. Must have a method *split* that behaves like the one of MosesTokenizer. tokenizer: sentence tokenizer object for the target language. Must have a method *split* that behaves like the one of MosesTokenizer.
output: where to store the log. Leave it unchanged to print to terminal. output: where to store the log. Leave it unchanged to print to terminal.
""" """
self.asr = asr self.asr = asr
self.tokenizer = tokenizer self.tokenizer = tokenizer
self.output = output self.logfile = logfile
self.init() self.init()
@ -227,7 +218,7 @@ class OnlineASRProcessor:
self.audio_buffer = np.array([],dtype=np.float32) self.audio_buffer = np.array([],dtype=np.float32)
self.buffer_time_offset = 0 self.buffer_time_offset = 0
self.transcript_buffer = HypothesisBuffer(output=self.output) self.transcript_buffer = HypothesisBuffer(logfile=self.logfile)
self.commited = [] self.commited = []
self.last_chunked_at = 0 self.last_chunked_at = 0
@ -262,9 +253,9 @@ class OnlineASRProcessor:
""" """
prompt, non_prompt = self.prompt() prompt, non_prompt = self.prompt()
print("PROMPT:", prompt, file=self.output) print("PROMPT:", prompt, file=self.logfile)
print("CONTEXT:", non_prompt, file=self.output) print("CONTEXT:", non_prompt, file=self.logfile)
print(f"transcribing {len(self.audio_buffer)/self.SAMPLING_RATE:2.2f} seconds from {self.buffer_time_offset:2.2f}",file=self.output) print(f"transcribing {len(self.audio_buffer)/self.SAMPLING_RATE:2.2f} seconds from {self.buffer_time_offset:2.2f}",file=self.logfile)
res = self.asr.transcribe(self.audio_buffer, init_prompt=prompt) res = self.asr.transcribe(self.audio_buffer, init_prompt=prompt)
# transform to [(beg,end,"word1"), ...] # transform to [(beg,end,"word1"), ...]
@ -273,8 +264,8 @@ class OnlineASRProcessor:
self.transcript_buffer.insert(tsw, self.buffer_time_offset) self.transcript_buffer.insert(tsw, self.buffer_time_offset)
o = self.transcript_buffer.flush() o = self.transcript_buffer.flush()
self.commited.extend(o) self.commited.extend(o)
print(">>>>COMPLETE NOW:",self.to_flush(o),file=self.output,flush=True) print(">>>>COMPLETE NOW:",self.to_flush(o),file=self.logfile,flush=True)
print("INCOMPLETE:",self.to_flush(self.transcript_buffer.complete()),file=self.output,flush=True) print("INCOMPLETE:",self.to_flush(self.transcript_buffer.complete()),file=self.logfile,flush=True)
# there is a newly confirmed text # there is a newly confirmed text
if o: if o:
@ -293,14 +284,14 @@ class OnlineASRProcessor:
# elif self.transcript_buffer.complete(): # elif self.transcript_buffer.complete():
# self.silence_iters = 0 # self.silence_iters = 0
# elif not self.transcript_buffer.complete(): # elif not self.transcript_buffer.complete():
# # print("NOT COMPLETE:",to_flush(self.transcript_buffer.complete()),file=self.output,flush=True) # # print("NOT COMPLETE:",to_flush(self.transcript_buffer.complete()),file=self.logfile,flush=True)
# self.silence_iters += 1 # self.silence_iters += 1
# if self.silence_iters >= 3: # if self.silence_iters >= 3:
# n = self.last_chunked_at # n = self.last_chunked_at
## self.chunk_completed_sentence() ## self.chunk_completed_sentence()
## if n == self.last_chunked_at: ## if n == self.last_chunked_at:
# self.chunk_at(self.last_chunked_at+self.chunk) # self.chunk_at(self.last_chunked_at+self.chunk)
# print(f"\tCHUNK: 3-times silence! chunk_at {n}+{self.chunk}",file=self.output) # print(f"\tCHUNK: 3-times silence! chunk_at {n}+{self.chunk}",file=self.logfile)
## self.silence_iters = 0 ## self.silence_iters = 0
@ -316,18 +307,18 @@ class OnlineASRProcessor:
#while k>0 and self.commited[k][1] > l: #while k>0 and self.commited[k][1] > l:
# k -= 1 # k -= 1
#t = self.commited[k][1] #t = self.commited[k][1]
print(f"chunking because of len",file=self.output) print(f"chunking because of len",file=self.logfile)
#self.chunk_at(t) #self.chunk_at(t)
print(f"len of buffer now: {len(self.audio_buffer)/self.SAMPLING_RATE:2.2f}",file=self.output) print(f"len of buffer now: {len(self.audio_buffer)/self.SAMPLING_RATE:2.2f}",file=self.logfile)
return self.to_flush(o) return self.to_flush(o)
def chunk_completed_sentence(self): def chunk_completed_sentence(self):
if self.commited == []: return if self.commited == []: return
print(self.commited,file=self.output) print(self.commited,file=self.logfile)
sents = self.words_to_sentences(self.commited) sents = self.words_to_sentences(self.commited)
for s in sents: for s in sents:
print("\t\tSENT:",s,file=self.output) print("\t\tSENT:",s,file=self.logfile)
if len(sents) < 2: if len(sents) < 2:
return return
while len(sents) > 2: while len(sents) > 2:
@ -335,7 +326,7 @@ class OnlineASRProcessor:
# we will continue with audio processing at this timestamp # we will continue with audio processing at this timestamp
chunk_at = sents[-2][1] chunk_at = sents[-2][1]
print(f"--- sentence chunked at {chunk_at:2.2f}",file=self.output) print(f"--- sentence chunked at {chunk_at:2.2f}",file=self.logfile)
self.chunk_at(chunk_at) self.chunk_at(chunk_at)
def chunk_completed_segment(self, res): def chunk_completed_segment(self, res):
@ -352,12 +343,12 @@ class OnlineASRProcessor:
ends.pop(-1) ends.pop(-1)
e = ends[-2]+self.buffer_time_offset e = ends[-2]+self.buffer_time_offset
if e <= t: if e <= t:
print(f"--- segment chunked at {e:2.2f}",file=self.output) print(f"--- segment chunked at {e:2.2f}",file=self.logfile)
self.chunk_at(e) self.chunk_at(e)
else: else:
print(f"--- last segment not within commited area",file=self.output) print(f"--- last segment not within commited area",file=self.logfile)
else: else:
print(f"--- not enough segments to chunk",file=self.output) print(f"--- not enough segments to chunk",file=self.logfile)
@ -403,7 +394,7 @@ class OnlineASRProcessor:
""" """
o = self.transcript_buffer.complete() o = self.transcript_buffer.complete()
f = self.to_flush(o) f = self.to_flush(o)
print("last, noncommited:",f,file=self.output) print("last, noncommited:",f,file=self.logfile)
return f return f