Merge pull request #3722 from evshiron/feat/progress-api

prototype progress api

modules/api/api.py

@@ -1,12 +1,40 @@
+import time
 import uvicorn
 from gradio.processing_utils import encode_pil_to_base64, decode_base64_to_file, decode_base64_to_image
-from fastapi import APIRouter, HTTPException
+from fastapi import APIRouter, Depends, HTTPException
 import modules.shared as shared
+from modules import devices
 from modules.api.models import *
 from modules.processing import StableDiffusionProcessingTxt2Img, StableDiffusionProcessingImg2Img, process_images
 from modules.sd_samplers import all_samplers
 from modules.extras import run_extras, run_pnginfo
 
+# copy from wrap_gradio_gpu_call of webui.py
+# because queue lock will be acquired in api handlers
+# and time start needs to be set
+# the function has been modified into two parts
+
+def before_gpu_call():
+    devices.torch_gc()
+
+    shared.state.sampling_step = 0
+    shared.state.job_count = -1
+    shared.state.job_no = 0
+    shared.state.job_timestamp = shared.state.get_job_timestamp()
+    shared.state.current_latent = None
+    shared.state.current_image = None
+    shared.state.current_image_sampling_step = 0
+    shared.state.skipped = False
+    shared.state.interrupted = False
+    shared.state.textinfo = None
+    shared.state.time_start = time.time()
+
+def after_gpu_call():
+    shared.state.job = ""
+    shared.state.job_count = 0
+
+    devices.torch_gc()
+
 def upscaler_to_index(name: str):
     try:
         return [x.name.lower() for x in shared.sd_upscalers].index(name.lower())
@@ -33,6 +61,7 @@ class Api:
         self.app.add_api_route("/sdapi/v1/extra-single-image", self.extras_single_image_api, methods=["POST"], response_model=ExtrasSingleImageResponse)
         self.app.add_api_route("/sdapi/v1/extra-batch-images", self.extras_batch_images_api, methods=["POST"], response_model=ExtrasBatchImagesResponse)
         self.app.add_api_route("/sdapi/v1/png-info", self.pnginfoapi, methods=["POST"], response_model=PNGInfoResponse)
+        self.app.add_api_route("/sdapi/v1/progress", self.progressapi, methods=["GET"], response_model=ProgressResponse)
 
     def text2imgapi(self, txt2imgreq: StableDiffusionTxt2ImgProcessingAPI):
         sampler_index = sampler_to_index(txt2imgreq.sampler_index)
@@ -49,8 +78,10 @@ class Api:
         )
         p = StableDiffusionProcessingTxt2Img(**vars(populate))
         # Override object param
+        before_gpu_call()
         with self.queue_lock:
             processed = process_images(p)
+        after_gpu_call()
 
         b64images = list(map(encode_pil_to_base64, processed.images))
 
@@ -89,8 +120,10 @@ class Api:
 
         p.init_images = imgs
         # Override object param
+        before_gpu_call()
         with self.queue_lock:
             processed = process_images(p)
+        after_gpu_call()
 
         b64images = list(map(encode_pil_to_base64, processed.images))
 
@@ -134,6 +167,32 @@ class Api:
 
         return PNGInfoResponse(info=result[1])
 
+    def progressapi(self, req: ProgressRequest = Depends()):
+        # copy from check_progress_call of ui.py
+
+        if shared.state.job_count == 0:
+            return ProgressResponse(progress=0, eta_relative=0, state=shared.state.dict())
+
+        # avoid dividing zero
+        progress = 0.01
+
+        if shared.state.job_count > 0:
+            progress += shared.state.job_no / shared.state.job_count
+        if shared.state.sampling_steps > 0:
+            progress += 1 / shared.state.job_count * shared.state.sampling_step / shared.state.sampling_steps
+
+        time_since_start = time.time() - shared.state.time_start
+        eta = (time_since_start/progress)
+        eta_relative = eta-time_since_start
+
+        progress = min(progress, 1)
+
+        current_image = None
+        if shared.state.current_image and not req.skip_current_image:
+            current_image = encode_pil_to_base64(shared.state.current_image)
+
+        return ProgressResponse(progress=progress, eta_relative=eta_relative, state=shared.state.dict(), current_image=current_image)
+
     def launch(self, server_name, port):
         self.app.include_router(self.router)
         uvicorn.run(self.app, host=server_name, port=port)

modules/api/models.py

@@ -156,3 +156,12 @@ class PNGInfoRequest(BaseModel):
 
 class PNGInfoResponse(BaseModel):
     info: str = Field(title="Image info", description="A string with all the info the image had")
+
+class ProgressRequest(BaseModel):
+    skip_current_image: bool = Field(default=False, title="Skip current image", description="Skip current image serialization")
+
+class ProgressResponse(BaseModel):
+    progress: float = Field(title="Progress", description="The progress with a range of 0 to 1")
+    eta_relative: float = Field(title="ETA in secs")
+    state: dict = Field(title="State", description="The current state snapshot")
+    current_image: str = Field(default=None, title="Current image", description="The current image in base64 format. opts.show_progress_every_n_steps is required for this to work.")

modules/shared.py

@@ -147,6 +147,19 @@ class State:
     def get_job_timestamp(self):
         return datetime.datetime.now().strftime("%Y%m%d%H%M%S")  # shouldn't this return job_timestamp?
 
+    def dict(self):
+        obj = {
+            "skipped": self.skipped,
+            "interrupted": self.skipped,
+            "job": self.job,
+            "job_count": self.job_count,
+            "job_no": self.job_no,
+            "sampling_step": self.sampling_step,
+            "sampling_steps": self.sampling_steps,
+        }
+
+        return obj
+
 
 state = State()