# YOLOv9

# parameters
nc: 80  # number of classes
depth_multiple: 1.0  # model depth multiple
width_multiple: 1.0  # layer channel multiple
#activation: nn.LeakyReLU(0.1)
#activation: nn.ReLU()

# anchors
anchors: 3

# gelan backbone
backbone:
  [
   [-1, 1, Silence, []],  
   
   # conv down
   [-1, 1, Conv, [32, 3, 2]],  # 1-P1/2

   # conv down
   [-1, 1, Conv, [64, 3, 2]],  # 2-P2/4

   # elan-1 block
   [-1, 1, RepNCSPELAN4, [128, 128, 64, 1]],  # 3

   # avg-conv down
   [-1, 1, AConv, [240]],  # 4-P3/8

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [240, 240, 120, 1]],  # 5

   # avg-conv down
   [-1, 1, AConv, [360]],  # 6-P4/16

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [360, 360, 180, 1]],  # 7

   # avg-conv down
   [-1, 1, AConv, [480]],  # 8-P5/32

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [480, 480, 240, 1]],  # 9
  ]

# elan head
head:
  [
   # elan-spp block
   [-1, 1, SPPELAN, [480, 240]],  # 10

   # up-concat merge
   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
   [[-1, 7], 1, Concat, [1]],  # cat backbone P4

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [360, 360, 180, 1]],  # 13

   # up-concat merge
   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
   [[-1, 5], 1, Concat, [1]],  # cat backbone P3

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [240, 240, 120, 1]],  # 16

   # avg-conv-down merge
   [-1, 1, AConv, [180]],
   [[-1, 13], 1, Concat, [1]],  # cat head P4

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [360, 360, 180, 1]],  # 19 (P4/16-medium)

   # avg-conv-down merge
   [-1, 1, AConv, [240]],
   [[-1, 10], 1, Concat, [1]],  # cat head P5

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [480, 480, 240, 1]],  # 22 (P5/32-large)
   
   # routing
   [5, 1, CBLinear, [[240]]], # 23
   [7, 1, CBLinear, [[240, 360]]], # 24
   [9, 1, CBLinear, [[240, 360, 480]]], # 25
   
   # conv down
   [0, 1, Conv, [32, 3, 2]],  # 26-P1/2

   # conv down
   [-1, 1, Conv, [64, 3, 2]],  # 27-P2/4

   # elan-1 block
   [-1, 1, RepNCSPELAN4, [128, 128, 64, 1]],  # 28

   # avg-conv down
   [-1, 1, AConv, [240]],   # 29-P3/8
   [[23, 24, 25, -1], 1, CBFuse, [[0, 0, 0]]], # 30  

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [240, 240, 120, 1]],  # 31

   # avg-conv down
   [-1, 1, AConv, [360]],   # 32-P4/16
   [[24, 25, -1], 1, CBFuse, [[1, 1]]], # 33 

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [360, 360, 180, 1]],  # 34

   # avg-conv down
   [-1, 1, AConv, [480]],   # 35-P5/32
   [[25, -1], 1, CBFuse, [[2]]], # 36

   # elan-2 block
   [-1, 1, RepNCSPELAN4, [480, 480, 240, 1]],  # 37

   # detect
   [[31, 34, 37, 16, 19, 22], 1, DualDDetect, [nc]],  # Detect(P3, P4, P5)
  ]