yuv420p_to_rgb.psh

; $MODE = "UniformRegister"

; $NUM_SPI_PS_INPUT_CNTL = 1
; texCoords R0
; $SPI_PS_INPUT_CNTL[0].SEMANTIC = 0
; $SPI_PS_INPUT_CNTL[0].DEFAULT_VAL = 1

; $SAMPLER_VARS[0].name = "tex0"
; $SAMPLER_VARS[0].type = "SAMPLER2D"
; $SAMPLER_VARS[0].location = 0
; $SAMPLER_VARS[1].name = "tex1"
; $SAMPLER_VARS[1].type = "SAMPLER2D"
; $SAMPLER_VARS[1].location = 1
; $SAMPLER_VARS[2].name = "tex2"
; $SAMPLER_VARS[2].type = "SAMPLER2D"
; $SAMPLER_VARS[2].location = 2

; converts YUV420P to RGB
; tex0 contains the Y plane, tex1 the U plane, tex2 the V plane
; based on: https://gist.github.com/crearo/798412489698e749c17e572e74496e1b

00 TEX: ADDR(48) CNT(3) VALID_PIX
    0  SAMPLE R1.x___, R0.xy0x, t0, s0
    1  SAMPLE R1._x__, R0.xy0x, t1, s1
    2  SAMPLE R1.__x_, R0.xy0x, t2, s2
01 ALU: ADDR(32) CNT(14)
    3  x: ADD    R1.x, R1.x, -0.0625
       y: ADD    R1.y, R1.y, -0.5
       z: ADD    R1.z, R1.z, -0.5
    4  x: MUL    R1.x, R1.x, 1.1643
    5  x: MULADD R0.x, R1.z, 1.5958,   R1.x
       y: MULADD R0.y, R1.y, -0.39173, R1.x
       z: MULADD R0.z, R1.y, 2.017,    R1.x
    6  y: MULADD R0.y, R1.z, -0.81290, R0.y
02 EXP_DONE: PIX0, R0.xyz1
END_OF_PROGRAM