Delete dt0_1/targets_shortcut.py

dt0_1/targets_shortcut.py

@@ -1,136 +0,0 @@
-import jax
-import jax.numpy as jnp
-import numpy as np
-
-def get_targets(FLAGS, key, train_state, images, labels, force_t=-1, force_dt=-1):
-    label_key, time_key, noise_key = jax.random.split(key, 3)
-    info = {}
-
-    #Convert dt_base to 0-1
-    #Make everything be continuous
-    #So if everything is continuous, then we don't sample dt_base like this
-    #We just allow us to sample anywhere
-    #And we say that two small steps = 1 big step
-    #But the biggest step, full = 1.0
-    #So two small steps to equal one big in log 2...???
-
-
-    # 1) =========== Sample dt. ============
-    bootstrap_batchsize = FLAGS.batch_size // FLAGS.model['bootstrap_every']
-    log2_sections = np.log2(FLAGS.model['denoise_timesteps']).astype(np.int32)
-    if FLAGS.model['bootstrap_dt_bias'] == 0:
-        dt_base = jnp.repeat(log2_sections - 1 - jnp.arange(log2_sections), bootstrap_batchsize // log2_sections)
-        dt_base = jnp.concatenate([dt_base, jnp.zeros(bootstrap_batchsize-dt_base.shape[0],)])
-        num_dt_cfg = bootstrap_batchsize // log2_sections
-    else:
-        dt_base = jnp.repeat(log2_sections - 1 - jnp.arange(log2_sections-2), (bootstrap_batchsize // 2) // log2_sections)
-        dt_base = jnp.concatenate([dt_base, jnp.ones(bootstrap_batchsize // 4), jnp.zeros(bootstrap_batchsize // 4)])
-        dt_base = jnp.concatenate([dt_base, jnp.zeros(bootstrap_batchsize-dt_base.shape[0],)])
-        num_dt_cfg = (bootstrap_batchsize // 2) // log2_sections
-    force_dt_vec = jnp.ones(bootstrap_batchsize, dtype=jnp.float32) * force_dt
-    dt_base = jnp.where(force_dt_vec != -1, force_dt_vec, dt_base)
-    
-    #Continuous time is easy
-    #And then just divide by 7 as needed for 0-1 log space.
-    #I guess we can also just have a special embedding for maximum or something
-    if False:
-        #dt_base = jnp.randint(0,7)#7 because exclusive.
-        dt_base = jax.random.uniform(0,1)*6
-        dt_base = dt_base / 7#First step
-
-    dt = 1 / (2 ** (dt_base)) # [1, 1/2, 1/4, 1/8, 1/16, 1/32]
-    dt_base_bootstrap = dt_base + 1
-    dt_bootstrap = dt / 2
-
-    # 2) =========== Sample t. ============
-    dt_sections = jnp.power(2, dt_base) # [1, 2, 4, 8, 16, 32]
-    t = jax.random.randint(time_key, (bootstrap_batchsize,), minval=0, maxval=dt_sections).astype(jnp.float32)
-    t = t / dt_sections # Between 0 and 1.
-    force_t_vec = jnp.ones(bootstrap_batchsize, dtype=jnp.float32) * force_t
-    t = jnp.where(force_t_vec != -1, force_t_vec, t)
-    t_full = t[:, None, None, None]
-
-    # 3) =========== Generate Bootstrap Targets ============
-    x_1 = images[:bootstrap_batchsize]
-    x_0 = jax.random.normal(noise_key, x_1.shape)
-    x_t = (1 - (1 - 1e-5) * t_full) * x_0 + t_full * x_1
-    bst_labels = labels[:bootstrap_batchsize]
-    call_model_fn = train_state.call_model if FLAGS.model['bootstrap_ema'] == 0 else train_state.call_model_ema
-    if not FLAGS.model['bootstrap_cfg']:
-        #We should just have dt_base /= 7
-        v_b1 = call_model_fn(x_t, t, dt_base_bootstrap, bst_labels, train=False)
-        t2 = t + dt_bootstrap
-        x_t2 = x_t + dt_bootstrap[:, None, None, None] * v_b1
-        x_t2 = jnp.clip(x_t2, -4, 4)
-        v_b2 = call_model_fn(x_t2, t2, dt_base_bootstrap, bst_labels, train=False)
-        v_target = (v_b1 + v_b2) / 2
-    else:
-        x_t_extra = jnp.concatenate([x_t, x_t[:num_dt_cfg]], axis=0)
-        t_extra = jnp.concatenate([t, t[:num_dt_cfg]], axis=0)
-        dt_base_extra = jnp.concatenate([dt_base_bootstrap, dt_base_bootstrap[:num_dt_cfg]], axis=0)
-        labels_extra = jnp.concatenate([bst_labels, jnp.ones(num_dt_cfg, dtype=jnp.int32) * FLAGS.model['num_classes']], axis=0)
-        #step 1
-        dt_base_extra = dt_base_extra / 7.0
-        v_b1_raw = call_model_fn(x_t_extra, t_extra, dt_base_extra, labels_extra, train=False)
-        v_b_cond = v_b1_raw[:x_1.shape[0]]
-        v_b_uncond = v_b1_raw[x_1.shape[0]:]
-        v_cfg = v_b_uncond + FLAGS.model['cfg_scale'] * (v_b_cond[:num_dt_cfg] - v_b_uncond)
-        v_b1 = jnp.concatenate([v_cfg, v_b_cond[num_dt_cfg:]], axis=0)
-
-        t2 = t + dt_bootstrap
-        x_t2 = x_t + dt_bootstrap[:, None, None, None] * v_b1
-        x_t2 = jnp.clip(x_t2, -4, 4)
-        x_t2_extra = jnp.concatenate([x_t2, x_t2[:num_dt_cfg]], axis=0)
-        t2_extra = jnp.concatenate([t2, t2[:num_dt_cfg]], axis=0)
-        v_b2_raw = call_model_fn(x_t2_extra, t2_extra, dt_base_extra, labels_extra, train=False)
-        v_b2_cond = v_b2_raw[:x_1.shape[0]]
-        v_b2_uncond = v_b2_raw[x_1.shape[0]:]
-        v_b2_cfg = v_b2_uncond + FLAGS.model['cfg_scale'] * (v_b2_cond[:num_dt_cfg] - v_b2_uncond)
-        v_b2 = jnp.concatenate([v_b2_cfg, v_b2_cond[num_dt_cfg:]], axis=0)
-        v_target = (v_b1 + v_b2) / 2
-
-    v_target = jnp.clip(v_target, -4, 4)
-    bst_v = v_target
-    bst_dt = dt_base
-    bst_t = t
-    bst_xt = x_t
-    bst_l = bst_labels
-
-    # 4) =========== Generate Flow-Matching Targets ============
-
-    labels_dropout = jax.random.bernoulli(label_key, FLAGS.model['class_dropout_prob'], (labels.shape[0],))
-    labels_dropped = jnp.where(labels_dropout, FLAGS.model['num_classes'], labels)
-    info['dropped_ratio'] = jnp.mean(labels_dropped == FLAGS.model['num_classes'])
-
-    # Sample t.
-    t = jax.random.randint(time_key, (images.shape[0],), minval=0, maxval=FLAGS.model['denoise_timesteps']).astype(jnp.float32)
-    t /= FLAGS.model['denoise_timesteps']
-    force_t_vec = jnp.ones(images.shape[0], dtype=jnp.float32) * force_t
-    t = jnp.where(force_t_vec != -1, force_t_vec, t)         # If force_t is not -1, then use force_t.
-    t_full = t[:, None, None, None] # [batch, 1, 1, 1]
-
-    # Sample flow pairs x_t, v_t.
-    x_0 = jax.random.normal(noise_key, images.shape)
-    x_1 = images
-    x_t = x_t = (1 - (1 - 1e-5) * t_full) * x_0 + t_full * x_1
-    v_t = v_t = x_1 - (1 - 1e-5) * x_0
-    dt_flow = np.log2(FLAGS.model['denoise_timesteps']).astype(jnp.int32)
-    dt_base = jnp.ones(images.shape[0], dtype=jnp.int32) * dt_flow
-
-    # ==== 5) Merge Flow+Bootstrap ====
-    bst_size = FLAGS.batch_size // FLAGS.model['bootstrap_every']
-    bst_size_data = FLAGS.batch_size - bst_size
-    x_t = jnp.concatenate([bst_xt, x_t[:bst_size_data]], axis=0)
-    t = jnp.concatenate([bst_t, t[:bst_size_data]], axis=0)
-    dt_base = jnp.concatenate([bst_dt, dt_base[:bst_size_data]], axis=0)
-    v_t = jnp.concatenate([bst_v, v_t[:bst_size_data]], axis=0)
-    labels_dropped = jnp.concatenate([bst_l, labels_dropped[:bst_size_data]], axis=0)
-    info['bootstrap_ratio'] = jnp.mean(dt_base != dt_flow)
-
-    info['v_magnitude_bootstrap'] = jnp.sqrt(jnp.mean(jnp.square(bst_v)))
-    info['v_magnitude_b1'] = jnp.sqrt(jnp.mean(jnp.square(v_b1)))
-    info['v_magnitude_b2'] = jnp.sqrt(jnp.mean(jnp.square(v_b2)))
-
-    dt_base = dt_base / 7.0
-    #print("dt base", dt_base)
-    return x_t, v_t, t, dt_base, labels_dropped, info