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| @/*****************************************************************************
| @*
| @* Copyright (C) 2012 Ittiam Systems Pvt Ltd, Bangalore
| @*
| @* Licensed under the Apache License, Version 2.0 (the "License");
| @* you may not use this file except in compliance with the License.
| @* You may obtain a copy of the License at:
| @*
| @* http://www.apache.org/licenses/LICENSE-2.0
| @*
| @* Unless required by applicable law or agreed to in writing, software
| @* distributed under the License is distributed on an "AS IS" BASIS,
| @* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
| @* See the License for the specific language governing permissions and
| @* limitations under the License.
| @*
| @*****************************************************************************/
| @/**
| @/*******************************************************************************
| @* @file
| @* ihevcd_fmt_conv_420sp_to_rgba8888.s
| @*
| @* @brief
| @* contains function definitions for format conversions
| @*
| @* @author
| @* ittiam
| @*
| @* @par list of functions:
| @*
| @*
| @* @remarks
| @* none
| @*
| @*******************************************************************************/
| .equ DO1STROUNDING, 0
|
| @ ARM
| @
| @ PRESERVE8
|
| .text
| .p2align 2
|
|
|
|
| @/*****************************************************************************
| @* *
| @* Function Name : ihevcd_fmt_conv_420sp_to_rgba8888() *
| @* *
| @* Description : This function conversts the image from YUV422 color *
| @* space to RGB888 color space. The function can be *
| @* invoked at the MB level. *
| @* *
| @* Arguments : R0 pubY *
| @* R1 pubUV *
| @* R2 pusRGB *
| @* R3 pusRGB *
| @* [R13 #40] usHeight *
| @* [R13 #44] usWidth *
| @* [R13 #48] usStrideY *
| @* [R13 #52] usStrideU *
| @* [R13 #56] usStrideV *
| @* [R13 #60] usStrideRGB *
| @* *
| @* Values Returned : None *
| @* *
| @* Register Usage : R0 - R14 *
| @* *
| @* Stack Usage : 104 Bytes *
| @* *
| @* Interruptibility : Interruptible *
| @* *
| @* Known Limitations *
| @* Assumptions: Image Width: Assumed to be multiple of 16 and *
| @* greater than or equal to 16 *
| @* Image Height: Assumed to be even. *
| @* *
| @* Revision History : *
| @* DD MM YYYY Author(s) Changes (Describe the changes made) *
| @* 07 06 2010 Varshita Draft *
| @* 07 06 2010 Naveen Kr T Completed *
| @* 05 08 2013 Naveen K P Modified for HEVC *
| @* 30 10 2018 Saurabh Sood Store D registers to stack *
| @*****************************************************************************/
| .global ihevcd_fmt_conv_420sp_to_rgba8888_a9q
| .type ihevcd_fmt_conv_420sp_to_rgba8888_a9q, function
| ihevcd_fmt_conv_420sp_to_rgba8888_a9q:
|
| @// push the registers on the stack
| STMFD SP!,{R4-R12,LR}
| VPUSH {d8-d15}
|
| @//R0 - Y PTR
| @//R1 - UV PTR
| @//R2 - RGB PTR
| @//R3 - RGB PTR
| @//R4 - PIC WIDTH
| @//R5 - PIC HT
| @//R6 - STRIDE Y
| @//R7 - STRIDE U
| @//R8 - STRIDE V
| @//R9 - STRIDE RGB
|
| @//ONE ROW PROCESSING AT A TIME
|
| @//THE FOUR CONSTANTS ARE:
| @//C1=0x3311,C2=0xF379,C3=0xE5F8,C4=0x4092
|
| @PLD [R0]
| @PLD [R1]
| @PLD [R2]
|
|
| @/* can be loaded from a defined const type */
| MOVW R10,#0x3311
| VMOV.16 D0[0],R10 @//C1
|
| MOVW R10,#0xF379
| VMOV.16 D0[1],R10 @//C2
|
| MOVW R10,#0xE5F8
| VMOV.16 D0[2],R10 @//C3
|
| MOVW R10,#0x4092
| VMOV.16 D0[3],R10 @//C4
|
| @//LOAD CONSTANT 128 INTO A CORTEX REGISTER
| MOV R10,#128
| VDUP.8 D1,R10
|
| @//D0 HAS C1-C2-C3-C4
| @// load other parameters from stack
| LDR R5,[sp,#104]
| @LDR R4,[sp,#44]
| LDR R6,[sp,#108]
| LDR R7,[sp,#112]
| @LDR R8,[sp,#52]
| LDR R9,[sp,#116]
|
| @// calculate offsets, offset = stride - width
| SUB R10,R6,R3 @// luma offset
| SUB R11,R7,R3
| @, LSR #1 @// u offset
| @SUB R12,R8,R3, LSR #1 @// v offset
| SUB R14,R9,R3 @// rgb offset in pixels
|
| @// calculate height loop count
| MOV R5,R5, LSR #1 @// height_cnt = height / 16
|
| @// create next row pointers for rgb and luma data
| ADD R7,R0,R6 @// luma_next_row = luma + luma_stride
| ADD R8,R2,R9,LSL #2 @// rgb_next_row = rgb + rgb_stride
|
| LABEL_YUV420SP_TO_RGB8888_HEIGHT_LOOP:
|
| @//LOAD VALUES OF U&V AND COMPUTE THE R,G,B WEIGHT VALUES.
| VLD1.8 {D2,D3},[R1]! @//LOAD 8 VALUES OF UV
| @//VLD1.8 {D3},[R2]! @//LOAD 8 VALUES OF V
|
| @// calculate width loop count
| MOV R6,R3, LSR #4 @// width_cnt = width / 16
|
| @//COMPUTE THE ACTUAL RGB VALUES,WE CAN DO TWO ROWS AT A TIME
| @//LOAD VALUES OF Y 8-BIT VALUES
| VLD2.8 {D30,D31},[R0]! @//D0 - Y0,Y2,Y4,Y6,Y8,Y10,Y12,Y14 row 1
| @//D1 - Y1,Y3,Y5,Y7,Y9,Y11,Y13,Y15
| VLD2.8 {D28,D29},[R7]! @//D0 - Y0,Y2,Y4,Y6,Y8,Y10,Y12,Y14 row2
| @//D1 - Y1,Y3,Y5,Y7,Y9,Y11,Y13,Y15
|
| SUBS R6,R6,#1
| BEQ LABEL_YUV420SP_TO_RGB8888_WIDTH_LOOP_SKIP
|
| LABEL_YUV420SP_TO_RGB8888_WIDTH_LOOP:
| @VMOV.I8 Q1,#128
| VUZP.8 D2,D3
|
|
| @//NEED TO SUBTRACT (U-128) AND (V-128)
| @//(D2-D1),(D3-D1)
| VSUBL.U8 Q2,D2,D1 @//(U-128)
| VSUBL.U8 Q3,D3,D1 @//(V-128)
|
| @//LOAD VALUES OF U&V for next row
| VLD1.8 {D2,D3},[R1]! @//LOAD 8 VALUES OF U
| @//VLD1.8 {D3},[R2]! @//LOAD 8 VALUES OF V
|
| @PLD [R0]
| PLD [R1]
|
| @//NEED TO MULTIPLY WITH Q2,Q3 WITH CO-EEFICIENTS
| VMULL.S16 Q4,D4,D0[3] @//(U-128)*C4 FOR B
| VMULL.S16 Q5,D5,D0[3] @//(U-128)*C4 FOR B
|
| VMULL.S16 Q10,D6,D0[0] @//(V-128)*C1 FOR R
| VMULL.S16 Q11,D7,D0[0] @//(V-128)*C1 FOR R
|
| VMULL.S16 Q6,D4,D0[1] @//(U-128)*C2 FOR G
| VMLAL.S16 Q6,D6,D0[2] @//Q6 = (U-128)*C2 + (V-128)*C3
| VMULL.S16 Q7,D5,D0[1] @//(U-128)*C2 FOR G
| VMLAL.S16 Q7,D7,D0[2] @//Q7 = (U-128)*C2 + (V-128)*C3
|
| @//NARROW RIGHT SHIFT BY 13 FOR R&B
| VQSHRN.S32 D8,Q4,#13 @//D8 = (U-128)*C4>>13 4 16-BIT VALUES
| VQSHRN.S32 D9,Q5,#13 @//D9 = (U-128)*C4>>13 4 16-BIT VALUES
| @//Q4 - WEIGHT FOR B
|
| @//NARROW RIGHT SHIFT BY 13 FOR R&B
| VQSHRN.S32 D10,Q10,#13 @//D10 = (V-128)*C1>>13 4 16-BIT VALUES
| VQSHRN.S32 D11,Q11,#13 @//D11 = (V-128)*C1>>13 4 16-BIT VALUES
| @//Q5 - WEIGHT FOR R
|
| @//NARROW RIGHT SHIFT BY 13 FOR G
| VQSHRN.S32 D12,Q6,#13 @//D12 = [(U-128)*C2 + (V-128)*C3]>>13 4 16-BIT VALUES
| VQSHRN.S32 D13,Q7,#13 @//D13 = [(U-128)*C2 + (V-128)*C3]>>13 4 16-BIT VALUES
| @//Q6 - WEIGHT FOR G
|
| VADDW.U8 Q7,Q4,D30 @//Q7 - HAS Y + B
| VADDW.U8 Q8,Q5,D30 @//Q8 - HAS Y + R
| VADDW.U8 Q9,Q6,D30 @//Q9 - HAS Y + G
|
| VADDW.U8 Q10,Q4,D31 @//Q10 - HAS Y + B
| VADDW.U8 Q11,Q5,D31 @//Q11 - HAS Y + R
| VADDW.U8 Q12,Q6,D31 @//Q12 - HAS Y + G
|
| VQMOVUN.S16 D14,Q7
| VQMOVUN.S16 D15,Q9
| VQMOVUN.S16 D16,Q8
| VMOV.I8 D17,#0
|
| VZIP.8 D14,D15
| VZIP.8 D16,D17
| VZIP.16 Q7,Q8
|
|
| VQMOVUN.S16 D20,Q10
| VQMOVUN.S16 D21,Q12
| VQMOVUN.S16 D22,Q11
| VMOV.I8 D23,#0
|
| VZIP.8 D20,D21
| VZIP.8 D22,D23
| VZIP.16 Q10,Q11
|
| VZIP.32 Q7,Q10
| VZIP.32 Q8,Q11
|
| VST1.32 D14,[R2]!
| VST1.32 D15,[R2]!
| VST1.32 D20,[R2]!
| VST1.32 D21,[R2]!
| VST1.32 D16,[R2]!
| VST1.32 D17,[R2]!
| VST1.32 D22,[R2]!
| VST1.32 D23,[R2]!
|
| @//D14-D20 - TOALLY HAVE 16 VALUES
| @//WE NEED TO SHIFT R,G,B VALUES TO GET 5BIT,6BIT AND 5BIT COMBINATIONS
| VADDW.U8 Q7,Q4,D28 @//Q7 - HAS Y + B
| VADDW.U8 Q8,Q5,D28 @//Q2 - HAS Y + R
| VADDW.U8 Q9,Q6,D28 @//Q3 - HAS Y + G
|
| VADDW.U8 Q10,Q4,D29 @//Q10 - HAS Y + B
| VADDW.U8 Q11,Q5,D29 @//Q11 - HAS Y + R
| VADDW.U8 Q12,Q6,D29 @//Q12 - HAS Y + G
|
| @//COMPUTE THE ACTUAL RGB VALUES,WE CAN DO TWO ROWS AT A TIME
| @//LOAD VALUES OF Y 8-BIT VALUES
| VLD2.8 {D30,D31},[R0]! @//D0 - Y0,Y2,Y4,Y6,Y8,Y10,Y12,Y14 row 1
| @//D1 - Y1,Y3,Y5,Y7,Y9,Y11,Y13,Y15
| VLD2.8 {D28,D29},[R7]! @//D0 - Y0,Y2,Y4,Y6,Y8,Y10,Y12,Y14 row2
| @//D1 - Y1,Y3,Y5,Y7,Y9,Y11,Y13,Y15
|
| PLD [R0]
| PLD [R7]
|
| VQMOVUN.S16 D14,Q7
| VQMOVUN.S16 D15,Q9
| VQMOVUN.S16 D16,Q8
| VMOV.I8 D17,#0
|
| VZIP.8 D14,D15
| VZIP.8 D16,D17
| VZIP.16 Q7,Q8
|
|
| VQMOVUN.S16 D20,Q10
| VQMOVUN.S16 D21,Q12
| VQMOVUN.S16 D22,Q11
| VMOV.I8 D23,#0
|
| VZIP.8 D20,D21
| VZIP.8 D22,D23
| VZIP.16 Q10,Q11
|
| VZIP.32 Q7,Q10
| VZIP.32 Q8,Q11
|
| VST1.32 D14,[R8]!
| VST1.32 D15,[R8]!
| VST1.32 D20,[R8]!
| VST1.32 D21,[R8]!
| VST1.32 D16,[R8]!
| VST1.32 D17,[R8]!
| VST1.32 D22,[R8]!
| VST1.32 D23,[R8]!
|
| SUBS R6,R6,#1 @// width_cnt -= 1
| BNE LABEL_YUV420SP_TO_RGB8888_WIDTH_LOOP
|
| LABEL_YUV420SP_TO_RGB8888_WIDTH_LOOP_SKIP:
| @VMOV.I8 Q1,#128
| VUZP.8 D2,D3
|
|
| @//NEED TO SUBTRACT (U-128) AND (V-128)
| @//(D2-D1),(D3-D1)
| VSUBL.U8 Q2,D2,D1 @//(U-128)
| VSUBL.U8 Q3,D3,D1 @//(V-128)
|
|
| @//NEED TO MULTIPLY WITH Q2,Q3 WITH CO-EEFICIENTS
| VMULL.S16 Q4,D4,D0[3] @//(U-128)*C4 FOR B
| VMULL.S16 Q5,D5,D0[3] @//(U-128)*C4 FOR B
|
| VMULL.S16 Q10,D6,D0[0] @//(V-128)*C1 FOR R
| VMULL.S16 Q11,D7,D0[0] @//(V-128)*C1 FOR R
|
| VMULL.S16 Q6,D4,D0[1] @//(U-128)*C2 FOR G
| VMLAL.S16 Q6,D6,D0[2] @//Q6 = (U-128)*C2 + (V-128)*C3
| VMULL.S16 Q7,D5,D0[1] @//(U-128)*C2 FOR G
| VMLAL.S16 Q7,D7,D0[2] @//Q7 = (U-128)*C2 + (V-128)*C3
|
| @//NARROW RIGHT SHIFT BY 13 FOR R&B
| VQSHRN.S32 D8,Q4,#13 @//D8 = (U-128)*C4>>13 4 16-BIT VALUES
| VQSHRN.S32 D9,Q5,#13 @//D9 = (U-128)*C4>>13 4 16-BIT VALUES
| @//Q4 - WEIGHT FOR B
|
| @//NARROW RIGHT SHIFT BY 13 FOR R&B
| VQSHRN.S32 D10,Q10,#13 @//D10 = (V-128)*C1>>13 4 16-BIT VALUES
| VQSHRN.S32 D11,Q11,#13 @//D11 = (V-128)*C1>>13 4 16-BIT VALUES
| @//Q5 - WEIGHT FOR R
|
| @//NARROW RIGHT SHIFT BY 13 FOR G
| VQSHRN.S32 D12,Q6,#13 @//D12 = [(U-128)*C2 + (V-128)*C3]>>13 4 16-BIT VALUES
| VQSHRN.S32 D13,Q7,#13 @//D13 = [(U-128)*C2 + (V-128)*C3]>>13 4 16-BIT VALUES
| @//Q6 - WEIGHT FOR G
|
| VADDW.U8 Q7,Q4,D30 @//Q7 - HAS Y + B
| VADDW.U8 Q8,Q5,D30 @//Q8 - HAS Y + R
| VADDW.U8 Q9,Q6,D30 @//Q9 - HAS Y + G
|
| VADDW.U8 Q10,Q4,D31 @//Q10 - HAS Y + B
| VADDW.U8 Q11,Q5,D31 @//Q11 - HAS Y + R
| VADDW.U8 Q12,Q6,D31 @//Q12 - HAS Y + G
|
| VQMOVUN.S16 D14,Q7
| VQMOVUN.S16 D15,Q9
| VQMOVUN.S16 D16,Q8
| VMOV.I8 D17,#0
|
| VZIP.8 D14,D15
| VZIP.8 D16,D17
| VZIP.16 Q7,Q8
|
|
| VQMOVUN.S16 D20,Q10
| VQMOVUN.S16 D21,Q12
| VQMOVUN.S16 D22,Q11
| VMOV.I8 D23,#0
|
| VZIP.8 D20,D21
| VZIP.8 D22,D23
| VZIP.16 Q10,Q11
|
| VZIP.32 Q7,Q10
| VZIP.32 Q8,Q11
|
| VST1.32 D14,[R2]!
| VST1.32 D15,[R2]!
| VST1.32 D20,[R2]!
| VST1.32 D21,[R2]!
| VST1.32 D16,[R2]!
| VST1.32 D17,[R2]!
| VST1.32 D22,[R2]!
| VST1.32 D23,[R2]!
|
| @//D14-D20 - TOALLY HAVE 16 VALUES
| @//WE NEED TO SHIFT R,G,B VALUES TO GET 5BIT,6BIT AND 5BIT COMBINATIONS
| VADDW.U8 Q7,Q4,D28 @//Q7 - HAS Y + B
| VADDW.U8 Q8,Q5,D28 @//Q2 - HAS Y + R
| VADDW.U8 Q9,Q6,D28 @//Q3 - HAS Y + G
|
| VADDW.U8 Q10,Q4,D29 @//Q10 - HAS Y + B
| VADDW.U8 Q11,Q5,D29 @//Q11 - HAS Y + R
| VADDW.U8 Q12,Q6,D29 @//Q12 - HAS Y + G
|
|
| VQMOVUN.S16 D14,Q7
| VQMOVUN.S16 D15,Q9
| VQMOVUN.S16 D16,Q8
| VMOV.I8 D17,#0
|
| VZIP.8 D14,D15
| VZIP.8 D16,D17
| VZIP.16 Q7,Q8
|
|
| VQMOVUN.S16 D20,Q10
| VQMOVUN.S16 D21,Q12
| VQMOVUN.S16 D22,Q11
| VMOV.I8 D23,#0
|
| VZIP.8 D20,D21
| VZIP.8 D22,D23
| VZIP.16 Q10,Q11
|
| VZIP.32 Q7,Q10
| VZIP.32 Q8,Q11
|
| VST1.32 D14,[R8]!
| VST1.32 D15,[R8]!
| VST1.32 D20,[R8]!
| VST1.32 D21,[R8]!
| VST1.32 D16,[R8]!
| VST1.32 D17,[R8]!
| VST1.32 D22,[R8]!
| VST1.32 D23,[R8]!
|
| @// Adjust the address pointers
| ADD R0,R7,R10 @// luma = luma_next + offset
| ADD R2,R8,R14,LSL #2 @// rgb = rgb_next + offset
|
| ADD R7,R0,R3 @// luma_next = luma + width
| ADD R8,R2,R3,LSL #2 @// rgb_next_row = rgb + width
|
| ADD R1,R1,R11 @// adjust u pointer
| @ADD R2,R2,R12 @// adjust v pointer
|
| ADD R7,R7,R10 @// luma_next = luma + width + offset (because of register crunch)
| ADD R8,R8,R14,LSL #2 @// rgb_next_row = rgb + width + offset
|
| SUBS R5,R5,#1 @// height_cnt -= 1
|
| BNE LABEL_YUV420SP_TO_RGB8888_HEIGHT_LOOP
|
| @//POP THE REGISTERS
| VPOP {d8-d15}
| LDMFD SP!,{R4-R12,PC}
|
|
| .section .note.GNU-stack,"",%progbits
|
|
