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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I_s.s')
| -rw-r--r-- | media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I_s.s | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I_s.s new file mode 100644 index 0000000..6328e01 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_QuantInvIntra_I_s.s @@ -0,0 +1,188 @@ +;/** +; * +; * File Name: omxVCM4P2_QuantInvIntra_I_s.s +; * OpenMAX DL: v1.0.2 +; * Revision: 9641 +; * Date: Thursday, February 7, 2008 +; * +; * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. +; * +; * +; * +; * Description: +; * Contains modules for inter reconstruction +; * +; * +; * +; * +; * +; * +; * Function: omxVCM4P2_QuantInvIntra_I +; * +; * Description: +; * Performs inverse quantization on intra/inter coded block. +; * This function supports bits_per_pixel = 8. Mismatch control +; * is performed for the first MPEG-4 mode inverse quantization method. +; * The output coefficients are clipped to the range: [-2048, 2047]. +; * Mismatch control is performed for the first inverse quantization method. +; * +; * Remarks: +; * +; * Parameters: +; * [in] pSrcDst pointer to the input (quantized) intra/inter block. Must be 16-byte aligned. +; * [in] QP quantization parameter (quantiser_scale) +; * [in] videoComp (Intra version only.) Video component type of the +; * current block. Takes one of the following flags: +; * OMX_VC_LUMINANCE, OMX_VC_CHROMINANCE, +; * OMX_VC_ALPHA. +; * [in] shortVideoHeader a flag indicating presence of short_video_header; +; * shortVideoHeader==1 selects linear intra DC mode, +; * and shortVideoHeader==0 selects nonlinear intra DC mode. +; * [out] pSrcDst pointer to the output (dequantized) intra/inter block. Must be 16-byte aligned. +; * +; * Return Value: +; * OMX_Sts_NoErr - no error +; * OMX_Sts_BadArgErr - bad arguments +; * - If pSrcDst is NULL or is not 16-byte aligned. +; * or +; * - If QP <= 0. +; * or +; * - videoComp is none of OMX_VC_LUMINANCE, OMX_VC_CHROMINANCE and OMX_VC_ALPHA. +; * + + + INCLUDE omxtypes_s.h + INCLUDE armCOMM_s.h + + M_VARIANTS ARM1136JS + + + IMPORT armVCM4P2_DCScaler + + + + IF ARM1136JS + +;//Input Arguments +pSrcDst RN 0 +QP RN 1 +videoComp RN 2 +shortVideoHeader RN 3 + +;//Local Variables +Return RN 0 +dcScaler RN 4 +temp RN 12 +index RN 6 + +tempVal21 RN 4 +tempVal43 RN 5 +QP1 RN 6 +X2 RN 7 +X3 RN 14 +Result1 RN 8 +Result2 RN 9 +two RN 10 +Count RN 11 + + + + + M_START omxVCM4P2_QuantInvIntra_I,r11 + + + + ;// Perform Inverse Quantization for DC coefficient + + TEQ shortVideoHeader,#0 ;// Test if short Video Header flag =0 + MOVNE dcScaler,#8 ;// if shortVideoHeader is non zero dcScaler=8 + BNE calDCVal + LDR index, =armVCM4P2_DCScaler + ADD index,index,videoComp,LSL #5 + LDRB dcScaler,[index,QP] + + + ;//M_CalDCScalar shortVideoHeader,videoComp, QP + +calDCVal + + LDRH temp,[pSrcDst] + SMULBB temp,temp,dcScaler ;// dcCoeff = dcScaler * Quantized DC coefficient(from memory) + SSAT temp,#12,temp ;// Saturating to 12 bits + + + MOV Count,#64 + TST QP,#1 + LDRD tempVal21,[pSrcDst] ;// Loads first two values of pSrcDst to tempVal21, + ;// next two values to tempVal43 + SUBEQ QP1,QP,#1 ;// QP1=QP if QP is odd , QP1=QP-1 if QP is even + MOVNE QP1,QP + MOV two,#2 + + + + + +Loop + + + SMULBB X2,tempVal21,two ;// X2= first val(lower 16 bits of tampVal21)*2 + CMP X2,#0 + + RSBLT X2,X2,#0 ;// X2=absoluteval(first val) + SMLABBNE X2,QP,X2,QP1 ;// X2=2*absval(first val)*QP+QP if QP is odd + ;// X2=2*absval(first val)*QP+QP-1 if QP is even + SMULTB X3,tempVal21,two ;// X3= second val(top 16 bits of tampVal21)*2 + RSBLT X2,X2,#0 + + CMP X3,#0 + + RSBLT X3,X3,#0 + SMLABBNE X3,QP,X3,QP1 + + RSBLT X3,X3,#0 + PKHBT Result1,X2,X3,LSL #16 ;// Result1[0-15]=X2[0-15],Result1[16-31]=X3[16-31] + SMULBB X2,tempVal43,two ;// X2= first val(lower 16 bits of tampVal43)*2 + SSAT16 Result1,#12,Result1 ;// clip to range [-2048,2047] + CMP X2,#0 + + + + RSBLE X2,X2,#0 + SMLABBNE X2,QP,X2,QP1 + SMULTB X3,tempVal43,two ;// X2= first val(top 16 bits of tampVal21)*2 + RSBLT X2,X2,#0 + CMP X3,#0 + + LDRD tempVal21,[pSrcDst,#8] ;// Load next four Values to tempVal21,tempVal43 + + RSBLT X3,X3,#0 + SMLABBNE X3,QP,X3,QP1 + RSBLT X3,X3,#0 + PKHBT Result2,X2,X3,LSL #16 ;// Result2[0-15]=X2[0-15],Result2[16-31]=X3[16-31] + SSAT16 Result2,#12,Result2 ;// clip to range [-2048,2047] + + SUBS Count,Count,#4 ;// Decrement Count by 4 and continue if it has not reached 0 + STRD Result1,[pSrcDst],#8 ;// Store Double words and increment the pointer to point the next store address + + + + BGT Loop + + SUB pSrcDst,pSrcDst,#128 + + ;// Storing the Inverse Quantized DC coefficient + + STRH temp,[pSrcDst],#2 + + + + MOV Return,#OMX_Sts_NoErr + + + + + M_END + ENDIF + END + |