** ** YUV to RGB/YUV422 conversion routines ** © 2002 Kakace Productions ** ** ** NOTES : ** - The scanning functions convert hardware-specific YUV components ** to their CCIR representation (except that Y is scaled to the ** range [0; 255]) using ITU BT 601 equations. INCDIR Devkit:NDK_3.9/Include_ASM TTL "FAR" MC68020 *--------------------------------------------------------------------------------------------------* XDEF _putCharProc _putCharProc move.b d0,(a3)+ ; For Exec/RawDoFormat() rts ; void ComputeFPS(struct EClockVal *t1, struct EClockVal *t2, struct fps_val *fps, ULONG ticspersec); ; 8 12 16 20 XDEF _ComputeFPS _ComputeFPS move.l d2,-(sp) movea.l 8(sp),a0 ; t1 movea.l 12(sp),a1 ; t2 move.l 4(a1),d1 sub.l 4(a0),d1 move.l (a1),d0 move.l (a0),d2 subx.l d2,d0 ; d0/d1 := t2 - t1 move.l 20(sp),d2 ; ticspersec movea.l 16(sp),a0 ; fps clr.l (a0) move.l #'0',4(a0) tst.l d0 bne.s .exit divul.l d1,d0:d2 move.l d2,(a0) mulu.l #10,d0 divu.l d1,d0 add.l #'0',d0 move.l d0,4(a0) .exit move.l (sp)+,d2 rts *--------------------------------------------------------------------------------------------------* ; Conversion functions (to YUV 4:2:2 or 24-bit RGB). ; YUV 4:2:2 is used by PiP (video layer) windows for monitoring purpose. Since the monitoring is ; limited to 360x310 (PAL), we have to convert at most 111600 pixels. ; The RGB conversion is used for monitoring (no PiP window available) or for scanning. XDEF _VLab_411_to_RGB XDEF _VLab_211_to_RGB XDEF _VLab_111_to_RGB XDEF _VLab_211_to_422 XDEF _VLab_111_to_422 XDEF _VLab_Y_to_422 XDEF UV_Table ******* VLab_Convert/VLab_411_to_RGB **************************************** * * NAME * VLab_411_to_RGB -- Convert YUV HiRes to 24-bit RGB. * * SYNOPSIS * VLab_411_to_RGB(y, uv, rgb, pixels) * * VOID VLab_411_to_RGB(UBYTE *, UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert YUV datas (CCIR, internal format) to 24-bit RGB. U and V values * are interpolated linearly. * * INPUTS * y - Pointer to the Y (luma) buffer. * uv - Pointer to the U,V (chroma) buffer. * rgb - Pointer to the RGB buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * Basic operations : * This function loads yuv components, interpolate the missing uv values * (due to the 4:1:1 format), then convert each yuv pixel to RGB. * * Y1U1V1 Y2U1V1 Y3U1V1 Y4U1V1 Y5U2V2 Y6U2V2 Y7U2V2 Y8U2V2 Y9U3V3 ... * => Y1U1V1 Y2U1V1 Y3U1V1 Y4u4v4 Y5u5v5 Y6u6v6 Y7U2V2 Y8u8v8 Y9u9v9 * u4 = (3.U1 + 1.U2) / 4 v4 = (3.V1 + 1.V2) / 4 * u5 = (1.U1 + 1.U2) / 2 v5 = (1.V1 + 1.V2) / 2 * u6 = (1.U1 + 3.U2) / 4 v6 = (1.V1 + 3.V2) / 4 * u8 = (3.U2 + 1.U3) / 4 v8 = (3.V2 + 1.V3) / 4 * _VLab_411_to_RGB movem.l d2-d7/a2,-(sp) ; 7 registers ARGBASE SET 8*4 ; Offset for the arguments. movea.l ARGBASE(sp),a2 ; Y values movea.l ARGBASE+4(sp),a1 ; U,V pairs movea.l ARGBASE+8(sp),a0 ; RGB buffer move.l ARGBASE+12(sp),d7 ; size (Y samples) moveq #0,d0 moveq #0,d3 moveq #0,d4 ; Main conversion loop. move.b (a1)+,d3 ; u move.w d3,d5 move.b (a1)+,d4 ; v move.w d4,d6 .conv_loop move.w d3,d1 move.w d4,d2 moveq #0,d0 add.w d5,d1 add.w d6,d2 move.b (a2)+,d0 addq.w #1,d1 ; Round the intermediate results addq.w #1,d2 lsr.w #1,d1 ; (u'+ u) / 2 lsr.w #1,d2 ; (v'+ v) / 2 bsr convert_RGB ; YUV -> RGB move.w d3,d1 ; u move.w d4,d2 ; v moveq #0,d0 add.w d1,d1 add.w d2,d2 add.w d3,d1 add.w d4,d2 add.w d5,d1 add.w d6,d2 move.b (a2)+,d0 addq.w #2,d1 ; Round the intermediate results addq.w #2,d2 lsr.w #2,d1 ; (u'+ 3u) / 4 lsr.w #2,d2 ; (v'+ 3v) / 4 bsr convert_RGB moveq #0,d0 move.b (a2)+,d0 ; Y move.w d3,d1 ; u move.w d4,d2 ; v bsr convert_RGB moveq #0,d0 move.b (a2)+,d0 tst.l d7 beq.s .lastCol move.w d3,d5 move.w d4,d6 move.b (a1)+,d3 ; u move.b (a1)+,d4 ; v move.w d5,d1 move.w d6,d2 add.w d1,d1 add.w d2,d2 add.w d5,d1 add.w d6,d2 add.w d3,d1 add.w d4,d2 addq.w #2,d1 ; Round the intermediate results addq.w #2,d2 lsr.w #2,d1 ; (3u'+ u) / 4 lsr.w #2,d2 ; (3v'+ u) / 4 bra.s .convert3 .lastCol move.w d3,d1 ; u move.w d4,d2 ; v .convert3 bsr convert_RGB subq.l #4,d7 bne .conv_loop movem.l (sp)+,d2-d7/a2 rts ******* VLab_Convert/VLab_211_to_RGB **************************************** * * NAME * VLab_211_to_RGB -- Convert YUV LoRes to 24-bit RGB. * * SYNOPSIS * VLab_211_to_RGB(y, uv, rgb, pixels) * * VOID VLab_211_to_RGB(UBYTE *, UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert YUV datas (CCIR, internal format) to 24-bit RGB. U and V values * are interpolated linearly. * * INPUTS * y - Pointer to the Y (luma) buffer. * uv - Pointer to the U,V (chroma) buffer. * rgb - Pointer to the RGB buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * _VLab_211_to_RGB movem.l d2-d7/a2,-(sp) ; 7 registers ARGBASE SET 8*4 ; Offset for the arguments. movea.l ARGBASE(sp),a2 ; Y values movea.l ARGBASE+4(sp),a1 ; U,V pairs movea.l ARGBASE+8(sp),a0 ; RGB buffer move.l ARGBASE+12(sp),d7 ; size (Y samples) moveq #0,d0 moveq #0,d3 moveq #0,d4 moveq #0,d5 ; Flag : First column lsr.l #1,d7 subq.w #1,d7 ; Pixel pair count. .conv_loop move.b (a1)+,d3 ; u move.b (a1)+,d4 ; v move.w d3,d1 move.w d4,d2 moveq #0,d0 move.b (a2)+,d0 tst.w d5 beq.s .firstCol add.w d5,d1 add.w d6,d2 addq.w #1,d1 ; Round the intermediate results addq.w #1,d2 lsr.w #1,d1 ; (u'+ u) / 2 lsr.w #1,d2 ; (v'+ v) / 2 .firstCol bsr convert_RGB ; YUV -> RGB moveq #0,d0 move.b (a2)+,d0 ; Y move.w d3,d1 ; u move.w d4,d2 ; v bsr convert_RGB move.w d3,d5 move.w d4,d6 dbra d7,.conv_loop movem.l (sp)+,d2-d7/a2 rts ******* VLab_Convert/VLab_111_to_RGB **************************************** * * NAME * VLab_111_to_RGB -- Convert YUV Thumbnail to 24-bit RGB. * * SYNOPSIS * VLab_111_to_RGB(y, uv, rgb, pixels) * * VOID VLab_111_to_RGB(UBYTE *, UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert YUV datas (CCIR, internal format) to 24-bit RGB. * * INPUTS * y - Pointer to the Y (luma) buffer. * uv - Pointer to the U,V (chroma) buffer. * rgb - Pointer to the RGB buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * _VLab_111_to_RGB movem.l d2-d3/a2,-(sp) ; 3 registers ARGBASE SET 4*4 ; Offset for the arguments. movea.l ARGBASE(sp),a2 ; Y values movea.l ARGBASE+4(sp),a1 ; U,V pairs movea.l ARGBASE+8(sp),a0 ; RGB buffer move.l ARGBASE+12(sp),d3 ; size (Y samples) subq.w #1,d3 ; Pixel pair count .conv_loop moveq #0,d1 move.b (a1)+,d1 ; u moveq #0,d2 move.b (a1)+,d2 ; v moveq #0,d0 move.b (a2)+,d0 ; Y bsr convert_RGB ; YUV -> RGB dbra d3,.conv_loop movem.l (sp)+,d2-d3/a2 rts ******* VLab_Convert/VLab_211_to_422 **************************************** * * NAME * VLab_211_to_422 -- Convert YUV LoRes to YUV 4:2:2 * * SYNOPSIS * VLab_211_to_422(y, uv, dest, pixels) * * VOID VLab_211_to_422(UBYTE *, UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert YUV datas (CCIR, internal format) to YUV 4:2:2 (the pixel format * is expressed as Y0 U0 Y1 V0). * * INPUTS * y - Pointer to the Y (luma) buffer. * uv - Pointer to the U,V (chroma) buffer. * dest - Pointer to the YUV 422 buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * _VLab_211_to_422 move.l a2,-(sp) ; 1 register ARGBASE SET 2*4 ; Offset for the arguments. movea.l ARGBASE(sp),a2 ; Y buffer movea.l ARGBASE+4(sp),a1 ; UV buffer movea.l ARGBASE+8(sp),a0 ; destBuffer (YUV422) move.l ARGBASE+12(sp),d1 ; numPixels lsr.l #1,d1 subq.w #1,d1 ; Pixel pair count. .conv_loop move.b (a2)+,d0 ; Y0 lsl.l #8,d0 move.b (a1)+,d0 ; Y0 U0 lsl.l #8,d0 move.b (a2)+,d0 ; Y0 U0 Y1 lsl.l #8,d0 move.b (a1)+,d0 ; Y0 U0 Y1 V0 move.l d0,(a0)+ ; to destBuffer dbra d1,.conv_loop movea.l (sp)+,a2 rts ******* VLab_Convert/VLab_111_to_422 **************************************** * * NAME * VLab_111_to_422 -- Convert YUV Thumbnail to YUV 4:2:2 * * SYNOPSIS * VLab_111_to_422(y, uv, dest, pixels) * * VOID VLab_111_to_422(UBYTE *, UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert YUV datas (CCIR, internal format) to YUV 4:2:2 (the pixel format * is expressed as Y0 U0 Y1 V0). Since the destination format requires less * chroma values, each U,V pair is mixed then combined with the respective * luma values. * * INPUTS * y - Pointer to the Y (luma) buffer. * uv - Pointer to the U,V (chroma) buffer. * dest - Pointer to the YUV 422 buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * _VLab_111_to_422 movem.l d2/a2,-(sp) ; 2 registers ARGBASE SET 3*4 ; Offset for the arguments. movea.l ARGBASE(sp),a2 ; Y buffer movea.l ARGBASE+4(sp),a1 ; UV buffer movea.l ARGBASE+8(sp),a0 ; destBuffer (YUV422) move.l ARGBASE+12(sp),d2 ; numPixels lsr.l #1,d2 subq.w #1,d2 ; Pixel pair count. .conv_loop moveq #0,d0 move.b (a1)+,d0 ; U0 swap d0 move.b (a1)+,d0 ; V0 moveq #0,d1 move.b (a1)+,d1 ; U1 swap d1 move.b (a1)+,d1 ; V1 add.l d1,d0 addi.l #$00010001,d0 ; Round the intermediate results. lsr.l #1,d0 andi.w #$00FF,d0 ; (U0+U1)/2 (V0+V1)/2 move.b (a2)+,d1 swap d1 move.b (a2)+,d1 lsl.l #8,d1 or.l d1,d0 move.l d0,(a0)+ dbra d2,.conv_loop movem.l (sp)+,d2/a2 rts ******* VLab_Convert/VLab_Y_to_422 ****************************************** * * NAME * VLab_Y_to_422 -- Convert YUV (any resolution) to YUV 4:2:2 (greyscale) * * SYNOPSIS * VLab_Y_to_422(y, dest, pixels) * * VOID VLab_Y_to_422(UBYTE *, UBYTE *, ULONG); * * FUNCTION * Convert Y datas (CCIR, internal format) to YUV 4:2:2 (the pixel format * is expressed as Y0 U0 Y1 V0). Chroma values are all set to 0. * * INPUTS * y - Pointer to the Y (luma) buffer. * dest - Pointer to the YUV 422 buffer. * pixels - Number of luma components, which is also the number of the * pixels (width * height). * * SEE ALSO * ***************************************************************************** * * _VLab_Y_to_422 movea.l 4(sp),a1 ; Y buffer movea.l 8(sp),a0 ; destBuffer (YUV422) move.l 12(sp),d1 ; numPixels lsr.l #1,d1 subq.w #1,d1 ; Pixel pair count. .conv_loop move.l #$80008000,d0 ; [U, V] = [0, 0] move.b (a1)+,d0 swap d0 move.b (a1)+,d0 rol.l #8,d0 move.l d0,(a0)+ dbra d1,.conv_loop rts *****i* VLab_Convert/Convert_RGB ******************************************** * * NAME * Convert_RGB -- Convert YUV values to 24-bit RGB (ASM only) * * SYNOPSIS * Convert_RGB(rgb, Y, U, V) * a0 d0 d1 d2 * * VOID Convert_RGB(UBYTE *, UWORD, UWORD, UWORD); * * FUNCTION * Convert YUV datas (CCIR, internal format) to 24-bit RGB * * INPUTS * rgb - Pointer to the RGB buffer. * Y - Y value [0; 255] * U - U value [16; 240] * V - V value [16; 240] * * NOTES * The conversion takes place as follow : * R'255 = Y + 408,583.V * G'255 = Y - 100,291.U - 208,120.V * B'255 = Y + 516,411.U * * d0, d1 and d2 registers are scratched. * * SEE ALSO * ***************************************************************************** * * convert_RGB move.l d3,-(sp) lsl.w #7,d0 ; Y * 128 move.w ITU_BT601(pc,d2.w*8),d3 ; range : [-22880; 22880] add.w d0,d3 ; Y + 204.V bpl.s .write_R svs d3 ext.w d3 ; 0 = underflow, $FFFF = overflow. .write_R lsr.w #7,d3 move.b d3,(a0)+ ; R move.w ITU_BT601+2(pc,d2.w*8),d3 ; range : [-11655; 11655] move.w d0,d2 add.w ITU_BT601+4(pc,d1.w*8),d3 ; range : [- 5616; 5616] sub.w d3,d2 bpl.s .write_G svs d2 ext.w d2 .write_G lsr.w #7,d2 move.b d2,(a0)+ ; G add.w ITU_BT601+6(pc,d1.w*8),d0 ; range : [-28919; 28919] bpl.s .write_B svs d0 ext.w d0 .write_B lsr.w #7,d0 move.b d0,(a0)+ ; B move.l (sp)+,d3 rts ; ITU BT601 table. ; V1 = V * 408.583 / 2 ; V2 = V * 208.128 / 2 ; 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$0993,$04E0,$0259,$0C1A,$0A5F,$0548,$028B,$0D1C,$0B2C,$05B0,$02BE,$0E1E,$0BF8,$0618,$02F0,$0F21 dc.w $0CC4,$0680,$0322,$1023,$0D90,$06E9,$0354,$1125,$0E5D,$0751,$0386,$1227,$0F29,$07B9,$03B8,$1329 dc.w $0FF5,$0821,$03EA,$142C,$10C2,$0889,$041D,$152E,$118E,$08F1,$044F,$1630,$125A,$0959,$0481,$1732 dc.w $1326,$09C1,$04B3,$1834,$13F3,$0A29,$04E5,$1937,$14BF,$0A91,$0517,$1A39,$158B,$0AF9,$0549,$1B3B dc.w $1658,$0B61,$057C,$1C3D,$1724,$0BC9,$05AE,$1D3F,$17F0,$0C31,$05E0,$1E42,$18BD,$0C99,$0612,$1F44 dc.w $1989,$0D01,$0644,$2046,$1A55,$0D69,$0676,$2148,$1B21,$0DD2,$06A8,$224A,$1BEE,$0E3A,$06DB,$234D dc.w $1CBA,$0EA2,$070D,$244F,$1D86,$0F0A,$073F,$2551,$1E53,$0F72,$0771,$2653,$1F1F,$0FDA,$07A3,$2756 dc.w $1FEB,$1042,$07D5,$2858,$20B7,$10AA,$0807,$295A,$2184,$1112,$083A,$2A5C,$2250,$117A,$086C,$2B5E dc.w $231C,$11E2,$089E,$2C61,$23E9,$124A,$08D0,$2D63,$24B5,$12B2,$0902,$2E65,$2581,$131A,$0934,$2F67 dc.w $264D,$1382,$0966,$3069,$271A,$13EA,$0999,$316C,$27E6,$1453,$09CB,$326E,$28B2,$14BB,$09FD,$3370 dc.w $297F,$1523,$0A2F,$3472,$2A4B,$158B,$0A61,$3574,$2B17,$15F3,$0A93,$3677,$2BE4,$165B,$0AC6,$3779 dc.w $2CB0,$16C3,$0AF8,$387B,$2D7C,$172B,$0B2A,$397D,$2E48,$1793,$0B5C,$3A7F,$2F15,$17FB,$0B8E,$3B82 dc.w $2FE1,$1863,$0BC0,$3C84,$30AD,$18CB,$0BF2,$3D86,$317A,$1933,$0C25,$3E88,$3246,$199B,$0C57,$3F8A dc.w $3312,$1A03,$0C89,$408D,$33DE,$1A6B,$0CBB,$418F,$34AB,$1AD3,$0CED,$4291,$3577,$1B3C,$0D1F,$4393 dc.w $3643,$1BA4,$0D51,$4495,$3710,$1C0C,$0D84,$4598,$37DC,$1C74,$0DB6,$469A,$38A8,$1CDC,$0DE8,$479C dc.w $3974,$1D44,$0E1A,$489E,$3A41,$1DAC,$0E4C,$49A1,$3B0D,$1E14,$0E7E,$4AA3,$3BD9,$1E7C,$0EB0,$4BA5 dc.w $3CA6,$1EE4,$0EE3,$4CA7,$3D72,$1F4C,$0F15,$4DA9,$3E3E,$1FB4,$0F47,$4EAC,$3F0B,$201C,$0F79,$4FAE dc.w $3FD7,$2084,$0FAB,$50B0,$40A3,$20EC,$0FDD,$51B2,$416F,$2154,$100F,$52B4,$423C,$21BC,$1042,$53B7 dc.w $4308,$2225,$1074,$54B9,$43D4,$228D,$10A6,$55BB,$44A1,$22F5,$10D8,$56BD,$456D,$235D,$110A,$57BF dc.w $4639,$23C5,$113C,$58C2,$4705,$242D,$116E,$59C4,$47D2,$2495,$11A1,$5AC6,$489E,$24FD,$11D3,$5BC8 dc.w $496A,$2565,$1205,$5CCA,$4A37,$25CD,$1237,$5DCD,$4B03,$2635,$1269,$5ECF,$4BCF,$269D,$129B,$5FD1 dc.w $4C9B,$2705,$12CD,$60D3,$4D68,$276D,$1300,$61D5,$4E34,$27D5,$1332,$62D8,$4F00,$283D,$1364,$63DA dc.w $4FCD,$28A6,$1396,$64DC,$5099,$290E,$13C8,$65DE,$5165,$2976,$13FA,$66E0,$5232,$29DE,$142C,$67E3 dc.w $52FE,$2A46,$145F,$68E5,$53CA,$2AAE,$1491,$69E7,$5496,$2B16,$14C3,$6AE9,$5563,$2B7E,$14F5,$6BEB dc.w $562F,$2BE6,$1527,$6CEE,$56FB,$2C4E,$1559,$6DF0,$57C8,$2CB6,$158C,$6EF2,$5894,$2D1E,$15BE,$6FF4 dc.w $5960,$2D86,$15F0,$70F7,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 dc.w $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 dc.w $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 dc.w $0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000,$0000 ; U and V correction table. ; The following table is ordered like this : u0, v0, u1, v2, u2, v2, etc ; For each value delivered by the SAA9051, the table provides the corresponding ; u and v components within CCIR range [-112; 112] + 128. ; SAA9051 range (U) : [-51; 50]. ; SAA9051 range (V) : [-54; 53]. UV_Table dc.b $81,$81,$83,$83,$86,$85,$88,$87,$8A,$89,$8C,$8C,$8E,$8E,$91,$90 dc.b $93,$92,$95,$94,$97,$96,$9A,$98,$9C,$9A,$9E,$9C,$A0,$9E,$A2,$A0 dc.b $A5,$A3,$A7,$A5,$A9,$A7,$AB,$A9,$AD,$AB,$B0,$AD,$B2,$AF,$B4,$B1 dc.b $B6,$B3,$B9,$B5,$BB,$B7,$BD,$BA,$BF,$BC,$C1,$BE,$C4,$C0,$C6,$C2 dc.b $C8,$C4,$CA,$C6,$CD,$C8,$CF,$CA,$D1,$CC,$D3,$CF,$D5,$D1,$D8,$D3 dc.b $DA,$D5,$DC,$D7,$DE,$D9,$E0,$DB,$E3,$DD,$E5,$DF,$E7,$E1,$E9,$E3 dc.b $EC,$E6,$EE,$E8,$F0,$EA,$F0,$EC,$F0,$EE,$F0,$F0,$F0,$F0,$F0,$F0 dc.b $F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0,$F0 dc.b $10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10,$10 dc.b $10,$10,$10,$10,$10,$10,$10,$12,$10,$14,$10,$16,$12,$18,$14,$1A dc.b $17,$1D,$19,$1F,$1B,$21,$1D,$23,$20,$25,$22,$27,$24,$29,$26,$2B dc.b $28,$2D,$2B,$2F,$2D,$31,$2F,$34,$31,$36,$33,$38,$36,$3A,$38,$3C dc.b $3A,$3E,$3C,$40,$3F,$42,$41,$44,$43,$46,$45,$49,$47,$4B,$4A,$4D dc.b $4C,$4F,$4E,$51,$50,$53,$53,$55,$55,$57,$57,$59,$59,$5B,$5B,$5D dc.b $5E,$60,$60,$62,$62,$64,$64,$66,$66,$68,$69,$6A,$6B,$6C,$6D,$6E dc.b $6F,$70,$72,$72,$74,$74,$76,$77,$78,$79,$7A,$7B,$7D,$7D,$7F,$7F