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@@ -7,6 +7,7 @@ from loguru import logger
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from PIL import Image
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from mineru.data.data_reader_writer import FileBasedDataWriter
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+from mineru.utils.check_sys_env import is_windows_environment
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from mineru.utils.pdf_reader import image_to_b64str, image_to_bytes, page_to_image
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from mineru.utils.enum_class import ImageType
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from mineru.utils.hash_utils import str_sha256
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@@ -61,67 +62,77 @@ def load_images_from_pdf(
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Raises:
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TimeoutError: 当转换超时时抛出
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"""
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- # 根据进程数调整超时时间
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- timeout = timeout // threads
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-
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pdf_doc = pdfium.PdfDocument(pdf_bytes)
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- end_page_id = get_end_page_id(end_page_id, len(pdf_doc))
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-
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- # 计算总页数
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- total_pages = end_page_id - start_page_id + 1
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-
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- # 实际使用的进程数不超过总页数
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- actual_threads = min(threads, total_pages)
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-
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- # 根据实际进程数分组页面范围
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- pages_per_thread = max(1, total_pages // actual_threads)
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- page_ranges = []
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-
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- for i in range(actual_threads):
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- range_start = start_page_id + i * pages_per_thread
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- if i == actual_threads - 1:
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- # 最后一个线程处理剩余所有页面
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- range_end = end_page_id
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- else:
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- range_end = start_page_id + (i + 1) * pages_per_thread - 1
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-
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- page_ranges.append((range_start, range_end))
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-
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- # logger.debug(f"PDF to images using {actual_threads} processes, page ranges: {page_ranges}")
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-
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- with ProcessPoolExecutor(max_workers=actual_threads) as executor:
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- # 提交所有任务
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- futures = []
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- for range_start, range_end in page_ranges:
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- future = executor.submit(
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- _load_images_from_pdf_worker,
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- pdf_bytes,
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- dpi,
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- range_start,
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- range_end,
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- image_type
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- )
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- futures.append((range_start, future))
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-
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- try:
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- # 收集结果并按页码排序
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- all_results = []
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- for range_start, future in futures:
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- images_list = future.result(timeout=timeout)
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- all_results.append((range_start, images_list))
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-
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- # 按起始页码排序并合并结果
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- all_results.sort(key=lambda x: x[0])
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- images_list = []
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- for _, imgs in all_results:
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- images_list.extend(imgs)
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-
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- return images_list, pdf_doc
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- except FuturesTimeoutError:
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- logger.error(f"PDF conversion timeout after {timeout}s")
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- pdf_doc.close()
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- executor.shutdown(wait=False, cancel_futures=True)
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- raise TimeoutError(f"PDF to images conversion timeout after {timeout}s")
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+ if is_windows_environment():
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+ # Windows 环境下不使用多进程
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+ return load_images_from_pdf_core(
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+ pdf_bytes,
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+ dpi,
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+ start_page_id,
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+ end_page_id,
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+ image_type
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+ ), pdf_doc
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+ else:
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+ # 根据进程数调整超时时间
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+ timeout = timeout // threads
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+
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+ end_page_id = get_end_page_id(end_page_id, len(pdf_doc))
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+
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+ # 计算总页数
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+ total_pages = end_page_id - start_page_id + 1
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+
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+ # 实际使用的进程数不超过总页数
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+ actual_threads = min(threads, total_pages)
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+
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+ # 根据实际进程数分组页面范围
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+ pages_per_thread = max(1, total_pages // actual_threads)
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+ page_ranges = []
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+
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+ for i in range(actual_threads):
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+ range_start = start_page_id + i * pages_per_thread
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+ if i == actual_threads - 1:
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+ # 最后一个线程处理剩余所有页面
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+ range_end = end_page_id
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+ else:
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+ range_end = start_page_id + (i + 1) * pages_per_thread - 1
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+
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+ page_ranges.append((range_start, range_end))
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+
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+ # logger.debug(f"PDF to images using {actual_threads} processes, page ranges: {page_ranges}")
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+
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+ with ProcessPoolExecutor(max_workers=actual_threads) as executor:
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+ # 提交所有任务
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+ futures = []
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+ for range_start, range_end in page_ranges:
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+ future = executor.submit(
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+ _load_images_from_pdf_worker,
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+ pdf_bytes,
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+ dpi,
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+ range_start,
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+ range_end,
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+ image_type
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+ )
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+ futures.append((range_start, future))
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+
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+ try:
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+ # 收集结果并按页码排序
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+ all_results = []
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+ for range_start, future in futures:
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+ images_list = future.result(timeout=timeout)
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+ all_results.append((range_start, images_list))
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+
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+ # 按起始页码排序并合并结果
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+ all_results.sort(key=lambda x: x[0])
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+ images_list = []
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+ for _, imgs in all_results:
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+ images_list.extend(imgs)
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+
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+ return images_list, pdf_doc
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+ except FuturesTimeoutError:
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+ logger.error(f"PDF conversion timeout after {timeout}s")
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+ pdf_doc.close()
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+ executor.shutdown(wait=False, cancel_futures=True)
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+ raise TimeoutError(f"PDF to images conversion timeout after {timeout}s")
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def load_images_from_pdf_core(
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