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trainer_difference.py
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import os
import glob
import time
import torch
import torch.utils
import torch.nn as nn
import torchvision
from torch.autograd import Variable
from torch.utils.data import DataLoader
from dataset import VaganDataset,LRWdataset
from model_difference import Generator, Discriminator
from tensorboard_logger import configure, log_value
from collections import OrderedDict
class Trainer():
def __init__(self, config):
self.generator = Generator()
self.discriminator = Discriminator()
print(self.generator)
print(self.discriminator)
self.bce_loss_fn = nn.BCELoss()
self.mse_loss_fn = nn.MSELoss()
self.opt_g = torch.optim.Adam(filter(lambda p: p.requires_grad, self.generator.parameters()),
lr=config.lr, betas=(config.beta1, config.beta2))
self.opt_d = torch.optim.Adam(self.discriminator.parameters(),
lr=config.lr, betas=(config.beta1, config.beta2))
if config.dataset == 'grid':
self.dataset = VaganDataset(config.dataset_dir, train=config.is_train)
elif config.dataset == 'lrw':
self.dataset = LRWdataset(config.dataset_dir, train=config.is_train)
self.data_loader = DataLoader(self.dataset,
batch_size=config.batch_size,
num_workers=config.num_thread,
shuffle=True, drop_last=True)
data_iter = iter(self.data_loader)
data_iter.next()
self.ones = Variable(torch.ones(config.batch_size), requires_grad=False)
self.zeros = Variable(torch.zeros(config.batch_size), requires_grad=False)
device_ids = [int(i) for i in config.device_ids.split(',')]
if config.cuda:
self.generator = nn.DataParallel(self.generator.cuda(), device_ids=device_ids)
self.discriminator = nn.DataParallel(self.discriminator.cuda(), device_ids=device_ids)
self.bce_loss_fn = self.bce_loss_fn.cuda()
self.mse_loss_fn = self.mse_loss_fn.cuda()
self.ones = self.ones.cuda()
self.zeros = self.zeros.cuda()
self.config = config
self.start_epoch = 0
self.load(config.model_dir)
def fit(self):
config = self.config
configure("{}/".format(config.log_dir), flush_secs=5)
num_steps_per_epoch = len(self.data_loader)
cc = 0
for epoch in range(self.start_epoch, config.max_epochs):
for step, (example, real_im, landmarks, right_audio, wrong_audio) in enumerate(self.data_loader):
t1 = time.time()
if config.cuda:
example = Variable(example).cuda()
landmarks = Variable(landmarks).cuda()
real_im = Variable(real_im).cuda()
right_audio = Variable(right_audio).cuda()
wrong_audio = Variable(wrong_audio).cuda()
else:
example = Variable(example)
landmarks = Variable(landmarks)
real_im = Variable(real_im)
right_audio = Variable(right_audio)
wrong_audio = Variable(wrong_audio)
fake_im = self.generator(example, right_audio)
# Train the discriminator
D_real = self.discriminator(real_im, right_audio)
D_wrong = self.discriminator(real_im, wrong_audio)
D_fake = self.discriminator(fake_im.detach(), right_audio)
loss_real = self.bce_loss_fn(D_real, self.ones)
loss_wrong = self.bce_loss_fn(D_wrong, self.zeros)
loss_fake = self.bce_loss_fn(D_fake, self.zeros)
loss_disc = loss_real + 0.5*(loss_fake + loss_wrong)
loss_disc.backward()
self.opt_d.step()
self._reset_gradients()
# Train the generator
fake_im = self.generator(example, right_audio)
D_fake = self.discriminator(fake_im, right_audio)
loss_gen = self.bce_loss_fn(D_fake, self.ones)
loss_gen.backward()
self.opt_g.step()
self._reset_gradients()
t2 = time.time()
if (step+1) % 1 == 0 or (step+1) == num_steps_per_epoch:
steps_remain = num_steps_per_epoch-step+1 + \
(config.max_epochs-epoch+1)*num_steps_per_epoch
eta = int((t2-t1)*steps_remain)
print("[{}/{}][{}/{}] Loss_D: {:.4f} Loss_G: {:.4f}, ETA: {} second"
.format(epoch+1, config.max_epochs,
step+1, num_steps_per_epoch,
loss_disc.data[0], loss_gen.data[0], eta))
log_value('discriminator_loss',loss_disc.data[0] , step + num_steps_per_epoch * epoch)
log_value('generator_loss',loss_gen.data[0] , step + num_steps_per_epoch * epoch)
if (step ) % (num_steps_per_epoch/3) == 0 :
fake_store = fake_im.data.permute(0,2,1,3,4).contiguous().view(config.batch_size*16,3,64,64)
torchvision.utils.save_image(fake_store,
"{}fake_{}.png".format(config.sample_dir,cc), nrow=16,normalize=True)
real_store = real_im.data.permute(0,2,1,3,4).contiguous().view(config.batch_size*16,3,64,64)
torchvision.utils.save_image(real_store,
"{}real_{}.png".format(config.sample_dir,cc), nrow=16,normalize=True)
cc += 1
if epoch % 1 == 0:
torch.save(self.generator.state_dict(),
"{}/generator_{}.pth"
.format(config.model_dir,epoch))
torch.save(self.discriminator.state_dict(),
"{}/discriminator_{}.pth"
.format(config.model_dir, epoch))
def load(self, directory):
# paths = glob.glob(os.path.join(directory, "*.pth"))
# gen_path = [path for path in paths if "generator" in path][0]
# disc_path = [path for path in paths if "discriminator" in path][0]
gen_path = '/mnt/disk0/dat/lchen63/grid/model/model_difference/generator_5.pth'
disc_path = '/mnt/disk0/dat/lchen63/grid/model/model_difference/discriminator_5.pth'
print("Loading pretrained [{}, {}]".format(gen_path, disc_path))
# gen_state_dict = torch.load(gen_path)
# new_gen_state_dict = OrderedDict()
# for k, v in gen_state_dict.items():
# name = 'model.' + k
# new_gen_state_dict[name] = v
# # load params
# self.generator.load_state_dict(new_gen_state_dict)
# disc_state_dict = torch.load(disc_path)
# new_disc_state_dict = OrderedDict()
# for k, v in disc_state_dict.items():
# name = 'model.' + k
# new_disc_state_dict[name] = v
# # load params
# self.discriminator.load_state_dict(new_disc_state_dict)
self.generator.load_state_dict(torch.load(gen_path))
self.discriminator.load_state_dict(torch.load(disc_path))
self.start_epoch = int(gen_path.split(".")[0].split("_")[-1])
print self.start_epoch
def _reset_gradients(self):
self.generator.zero_grad()
self.discriminator.zero_grad()