def _generate_batches(self, recurrent_net, batch_size, max_seqs=-1, batch_variance=0.0, max_seq_length=sys.maxsize): """ :param bool recurrent_net: If True, the batch might have a batch seq dimension > 1. Otherwise, the batch seq dimension is always 1 and multiple seqs will be concatenated. :param int batch_size: Max number of frames in one batch. :param int max_seqs: Max number of seqs per batch. """ if batch_size == 0: batch_size = sys.maxsize assert batch_size > 0 ms = max_seqs bs = batch_size if max_seqs == -1: max_seqs = float('inf') assert max_seqs > 0 chunk_size = self.chunk_size chunk_step = self.chunk_step if not recurrent_net: if chunk_size != 0: print >> log.v4, "Non-recurrent network, chunk size %i:%i ignored" % (chunk_size, chunk_step) chunk_size = 0 assert batch_variance <= 1.0 if batch_variance > 0.0: r = (1.0 - self.rnd_batch_variance.random() * batch_variance) if max_seqs > 0: max_seqs = max(int(r * ms), 1) #if batch_size > 0: # batch_size = max(int(r * bs), 1) batch = Batch() for seq_idx, t_start, t_end in self._iterate_seqs(chunk_size=chunk_size, chunk_step=chunk_step): if recurrent_net: length = t_end - t_start if length.max_value() > max_seq_length: continue if length.max_value() > batch_size: print >> log.v4, "warning: sequence length (%i) larger than limit (%i)" % (length.max_value(), batch_size) dt, ds = batch.try_sequence_as_slice(length) if ds > 1 and ((dt * ds).max_value() > batch_size or ds > max_seqs): yield batch batch = Batch() if batch_variance > 0.0: r = (1.0 - self.rnd_batch_variance.random() * batch_variance) if max_seqs > 0: max_seqs = max(int(r * ms), 1) #if batch_size > 0: # batch_size = max(int(r * bs), 1) batch.add_sequence_as_slice(seq_idx=seq_idx, seq_start_frame=t_start, length=length) else: # Not recurrent. while t_start.max_value() < t_end.max_value(): length = t_end - t_start num_frames = min(length.max_value(), batch_size - batch.get_all_slices_num_frames()) assert num_frames > 0 batch.add_frames(seq_idx=seq_idx, seq_start_frame=t_start, length=num_frames) if batch.get_all_slices_num_frames() >= batch_size or batch.get_num_seqs() > max_seqs: yield batch batch = Batch() t_start += num_frames if batch.get_all_slices_num_frames() > 0: yield batch
def _generate_batches(self, recurrent_net, batch_size, max_seqs=-1, seq_drop=0.0, max_seq_length=sys.maxsize, used_data_keys=None): """ :param bool recurrent_net: If True, the batch might have a batch seq dimension > 1. Otherwise, the batch seq dimension is always 1 and multiple seqs will be concatenated. :param int batch_size: Max number of frames in one batch. :param int max_seqs: Max number of seqs per batch. :param set(str)|None used_data_keys: """ if batch_size == 0: batch_size = sys.maxsize assert batch_size > 0 if max_seqs == -1: max_seqs = float('inf') assert max_seqs > 0 assert seq_drop <= 1.0 chunk_size = self.chunk_size chunk_step = self.chunk_step if not recurrent_net: if chunk_size != 0: print("Non-recurrent network, chunk size %i:%i ignored" % (chunk_size, chunk_step), file=log.v4) chunk_size = 0 batch = Batch() for seq_idx, t_start, t_end in self._iterate_seqs( chunk_size=chunk_size, chunk_step=chunk_step, used_data_keys=used_data_keys): if recurrent_net: length = t_end - t_start if max_seq_length < 0 and length['classes'] > -max_seq_length: continue elif max_seq_length > 0 and length.max_value( ) > max_seq_length: continue if length.max_value() > batch_size: print( "warning: sequence length (%i) larger than limit (%i)" % (length.max_value(), batch_size), file=log.v4) if self.rnd_seq_drop.random() < seq_drop: continue dt, ds = batch.try_sequence_as_slice(length) if ds > 1 and ((dt * ds).max_value() > batch_size or ds > max_seqs): yield batch batch = Batch() batch.add_sequence_as_slice(seq_idx=seq_idx, seq_start_frame=t_start, length=length) else: # Not recurrent. while t_start.max_value() < t_end.max_value(): length = t_end - t_start num_frames = NumbersDict.min([ length, batch_size - batch.get_all_slices_num_frames() ]) assert num_frames.max_value() > 0 batch.add_frames(seq_idx=seq_idx, seq_start_frame=t_start, length=num_frames) if batch.get_all_slices_num_frames( ) >= batch_size or batch.get_num_seqs() > max_seqs: yield batch batch = Batch() t_start += num_frames if batch.get_all_slices_num_frames() > 0: yield batch
def _generate_batches(self, recurrent_net, batch_size, max_seqs=-1, max_seq_length=sys.maxsize, min_seq_length=0, seq_drop=0.0, max_total_num_seqs=-1, used_data_keys=None): """ :param bool recurrent_net: If True, the batch might have a batch seq dimension > 1. Otherwise, the batch seq dimension is always 1 and multiple seqs will be concatenated. :param int batch_size: Max number of frames in one batch. :param int max_seqs: Max number of seqs per batch. :param int max_total_num_seqs: :param int|dict[str,int]|NumbersDict max_seq_length: :param set(str)|None used_data_keys: """ if batch_size == 0: batch_size = sys.maxsize assert batch_size > 0 if max_seqs == -1: max_seqs = float('inf') if not max_seq_length: max_seq_length = sys.maxsize if isinstance(max_seq_length, int) and max_seq_length < 0: max_seq_length = {"classes": -max_seq_length} max_seq_length = NumbersDict(max_seq_length) min_seq_length = NumbersDict(min_seq_length) assert max_seqs > 0 assert seq_drop <= 1.0 if not max_total_num_seqs or max_total_num_seqs < 0: max_total_num_seqs = float("inf") chunk_size = self.chunk_size chunk_step = self.chunk_step if not recurrent_net: if chunk_size != 0: print("Non-recurrent network, chunk size %s:%s ignored" % (chunk_size, chunk_step), file=log.v4) chunk_size = 0 batch = Batch() ctx_lr = self._get_context_window_left_right() total_num_seqs = 0 last_seq_idx = -1 for seq_idx, t_start, t_end in self.iterate_seqs( chunk_size=chunk_size, chunk_step=chunk_step, used_data_keys=used_data_keys): if seq_idx != last_seq_idx and total_num_seqs >= max_total_num_seqs: break if ctx_lr: t_start -= ctx_lr[0] t_end += ctx_lr[1] if recurrent_net: length = t_end - t_start if length.any_compare(max_seq_length, (lambda a, b: a > b)): continue if length.any_compare(min_seq_length, (lambda a, b: a < b)): continue if length.max_value() > batch_size: print( "warning: sequence length (%i) larger than limit (%i)" % (length.max_value(), batch_size), file=log.v4) if self.rnd_seq_drop.random() < seq_drop: continue dt, ds = batch.try_sequence_as_slice(length) if ds > 1 and ((dt * ds).max_value() > batch_size or ds > max_seqs): yield batch batch = Batch() batch.add_sequence_as_slice(seq_idx=seq_idx, seq_start_frame=t_start, length=length) else: # Not recurrent. while t_start.max_value() < t_end.max_value(): length = t_end - t_start num_frames = NumbersDict.min([ length, batch_size - batch.get_all_slices_num_frames() ]) assert num_frames.max_value() > 0 batch.add_frames(seq_idx=seq_idx, seq_start_frame=t_start, length=num_frames) if batch.get_all_slices_num_frames( ) >= batch_size or batch.get_num_seqs() > max_seqs: yield batch batch = Batch() t_start += num_frames if seq_idx != last_seq_idx: last_seq_idx = seq_idx total_num_seqs += 1 if batch.get_all_slices_num_frames() > 0: yield batch
def _generate_batches(self, recurrent_net, batch_size, max_seqs=-1, max_seq_length=sys.maxsize, min_seq_length=0, pruning=0.0, seq_drop=0.0, max_total_num_seqs=-1, used_data_keys=None): """ :param bool recurrent_net: If True, the batch might have a batch seq dimension > 1. Otherwise, the batch seq dimension is always 1 and multiple seqs will be concatenated. :param int|dict[str,int]|NumbersDict batch_size: Max number of frames in one batch. :param int max_seqs: Max number of seqs per batch. :param int max_total_num_seqs: :param int|dict[str,int]|NumbersDict max_seq_length: :param set(str)|None used_data_keys: """ if not batch_size: batch_size = sys.maxsize batch_size = NumbersDict(batch_size) assert not batch_size.any_compare(NumbersDict(0), (lambda a, b: a <= b)) if max_seqs == -1: max_seqs = float('inf') if not max_seq_length: max_seq_length = sys.maxsize if isinstance(max_seq_length, int) and max_seq_length < 0: max_seq_length = {"classes": -max_seq_length} max_seq_length = NumbersDict(max_seq_length) min_seq_length = NumbersDict(min_seq_length) assert max_seqs > 0 assert seq_drop <= 1.0 if not max_total_num_seqs or max_total_num_seqs < 0: max_total_num_seqs = float("inf") chunk_size = self.chunk_size chunk_step = self.chunk_step if not recurrent_net: if chunk_size != 0: print("Non-recurrent network, chunk size %s:%s ignored" % (chunk_size, chunk_step), file=log.v4) chunk_size = 0 batch = Batch() ctx_lr = self._get_context_window_left_right() total_num_seqs = 0 last_seq_idx = -1 avg_weight = sum([v[0] for v in self.weights.values()]) / (len(self.weights.keys()) or 1) for idx in self.weights: self.weights[idx][1] = random() * avg_weight * pruning self.weights[idx][0] *= (1. + pruning) for seq_idx, t_start, t_end in self.iterate_seqs( chunk_size=chunk_size, chunk_step=chunk_step, used_data_keys=used_data_keys): if not self.sample(seq_idx): continue if total_num_seqs > max_total_num_seqs: break if ctx_lr: t_start -= ctx_lr[0] t_end += ctx_lr[1] if recurrent_net: length = t_end - t_start if length.any_compare(max_seq_length, (lambda a, b: a > b)): continue if length.any_compare(min_seq_length, (lambda a, b: a < b)): continue if length.any_compare(batch_size, (lambda a, b: a > b)): print("warning: sequence length (%r) larger than limit (%r)" % (length, batch_size), file=log.v4) if self.rnd_seq_drop.random() < seq_drop: continue dt, ds = batch.try_sequence_as_slice(length) if ds > 1 and ((dt * ds).any_compare(batch_size, (lambda a, b: a > b)) or ds > max_seqs): yield batch batch = Batch() batch.add_sequence_as_slice(seq_idx=seq_idx, seq_start_frame=t_start, length=length) else: # Not recurrent. while t_start.max_value() < t_end.max_value(): length = t_end - t_start num_frames = NumbersDict.min( [length, batch_size.copy_like(length) - batch.get_all_slices_num_frames().copy_like(length)]) assert num_frames.max_value() > 0 batch.add_frames(seq_idx=seq_idx, seq_start_frame=t_start, length=num_frames) if (batch.get_all_slices_num_frames().any_compare(batch_size, (lambda a, b: a >= b)) or batch.get_num_seqs() > max_seqs): yield batch batch = Batch() t_start += num_frames if seq_idx != last_seq_idx: last_seq_idx = seq_idx total_num_seqs += 1 if batch.get_all_slices_num_frames().max_value() > 0: yield batch