text: /*
   * Copyright © 2018-2021, VideoLAN and dav1d authors
   * Copyright © 2018, Two Orioles, LLC
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   *    list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   *    this list of conditions and the following disclaimer in the documentation
   *    and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef DAV1D_SRC_THREAD_TASK_H
  #define DAV1D_SRC_THREAD_TASK_H
  
  #include <limits.h>
  
  #include "src/internal.h"
  
  #define FRAME_ERROR (UINT_MAX - 1)
  #define TILE_ERROR (INT_MAX - 1)
  
  enum TaskStatus {
      DAV1D_TASK_DEFAULT,
      DAV1D_TASK_READY,
      DAV1D_TASK_RUNNING,
      DAV1D_TASK_DONE,
  };
  
  struct Dav1dTask {
      enum TaskStatus status;     // task status
      int start;                  // frame thread start flag
      unsigned frame_idx;         // frame thread id
      int frame_id;               // frame ordering
      int sby;                    // sbrow
      filter_sbrow_fn fn;         // task work
      Dav1dTask *last_deps[2];    // dependencies
      Dav1dTask *next_deps[2];    // dependant tasks
      Dav1dTask *next_exec;       // tasks scheduling
  };
  
  int dav1d_task_create_filter_sbrow(Dav1dFrameContext *f);
  void dav1d_task_schedule(struct PostFilterThreadData *pftd, Dav1dTask *t);
  
  void *dav1d_frame_task(void *data);
  void *dav1d_tile_task(void *data);
  void *dav1d_postfilter_task(void *data);
  
  int dav1d_decode_frame(Dav1dFrameContext *f);
  int dav1d_decode_tile_sbrow(Dav1dTileContext *t);
  
  #endif /* DAV1D_SRC_THREAD_TASK_H */
  