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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s')
| -rwxr-xr-x | media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s new file mode 100755 index 0000000..e4a7f33 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s @@ -0,0 +1,398 @@ +;/** +; * +; * File Name: armVCM4P2_DecodeVLCZigzag_AC_unsafe_s.s +; * OpenMAX DL: v1.0.2 +; * Revision: 12290 +; * Date: Wednesday, April 9, 2008 +; * +; * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. +; * +; * +; * +; * Description: +; * Contains modules for zigzag scanning and VLC decoding +; * for inter, intra block. +; * +; * +; * +; * Function: omxVCM4P2_DecodeVLCZigzag_AC_unsafe +; * +; * Description: +; * Performs VLC decoding and inverse zigzag scan +; * +; * +; * +; * +; */ + + + INCLUDE omxtypes_s.h + INCLUDE armCOMM_s.h + INCLUDE armCOMM_BitDec_s.h + + + M_VARIANTS ARM1136JS + + + + + + IF ARM1136JS + + + + + +;//Input Arguments + +ppBitStream RN 0 +pBitOffset RN 1 +pDst RN 2 +shortVideoHeader RN 3 + + +;//Local Variables + +Return RN 0 + +pVlcTableL0L1 RN 4 +pLMAXTableL0L1 RN 4 +pRMAXTableL0L1 RN 4 +pZigzagTable RN 4 + +ftype RN 0 +temp3 RN 4 +temp RN 5 +Count RN 6 +Escape RN 5 + +;// armVCM4P2_FillVLDBuffer +zigzag RN 0 +storeLevel RN 1 +temp2 RN 4 +temp1 RN 5 +sign RN 5 +Last RN 7 +storeRun RN 14 + + +packRetIndex RN 5 + + +markerbit RN 5 + +;// Scratch Registers + +RBitStream RN 8 +RBitBuffer RN 9 +RBitCount RN 10 + +T1 RN 11 +T2 RN 12 +LR RN 14 + + + + M_ALLOC4 pppBitStream,4 + M_ALLOC4 ppOffset,4 + M_ALLOC4 pLinkRegister,4 + + M_START armVCM4P2_DecodeVLCZigzag_AC_unsafe + + ;// get the table addresses from stack + M_ARG ppVlcTableL0L1,4 + M_ARG ppLMAXTableL0L1,4 + M_ARG ppRMAXTableL0L1,4 + M_ARG ppZigzagTable,4 + + ;// Store ALL zeros at pDst + + MOV temp1,#0 ;// Initialize Count to zero + MOV Last,#0 + M_STR LR,pLinkRegister ;// Store Link Register on Stack + MOV temp2,#0 + MOV LR,#0 + + ;// Initialize the Macro and Store all zeros to pDst + + STM pDst!,{temp2,temp1,Last,LR} + M_BD_INIT0 ppBitStream, pBitOffset, RBitStream, RBitBuffer, RBitCount + STM pDst!,{temp2,temp1,Last,LR} + M_BD_INIT1 T1, T2, T2 + STM pDst!,{temp2,temp1,Last,LR} + M_BD_INIT2 T1, T2, T2 + STM pDst!,{temp2,temp1,Last,LR} + M_STR ppBitStream,pppBitStream ;// Store ppBitstream on stack + STM pDst!,{temp2,temp1,Last,LR} + M_STR pBitOffset,ppOffset ;// Store pBitOffset on stack + STM pDst!,{temp2,temp1,Last,LR} + + STM pDst!,{temp2,temp1,Last,LR} + STM pDst!,{temp2,temp1,Last,LR} + + + SUB pDst,pDst,#128 ;// Restore pDst + + ;// The armVCM4P2_GetVLCBits begins + +getVLCbits + + M_BD_LOOK8 Escape,7 ;// Load Escape Value + LSR Escape,Escape,#25 + CMP Escape,#3 ;// check for escape mode + MOVNE ftype,#0 + BNE notEscapemode ;// Branch if not in Escape mode 3 + + M_BD_VSKIP8 #7,T1 + CMP shortVideoHeader,#0 ;// Check shortVideoHeader flag to know the type of Escape mode + BEQ endFillVLD + + ;// Escape Mode 4 + + M_BD_READ8 Last,1,T1 + M_BD_READ8 storeRun,6,T1 + M_BD_READ8 storeLevel,8,T1 + + + ;// Check whether the Reserved values for Level are used and Exit with an Error Message if it is so + + TEQ storeLevel,#0 + TEQNE storeLevel,#128 + BEQ ExitError + + ADD temp2,storeRun,Count + CMP temp2,#64 + BGE ExitError ;// error if Count+storeRun >= 64 + + + ;// Load address of zigzagTable + + M_LDR pZigzagTable,ppZigzagTable ;// Loading the Address of Zigzag table + + + ;// armVCM4P2_FillVLDBuffer + + SXTB storeLevel,storeLevel ;// Sign Extend storeLevel to 32 bits + + + ;// To Reflect Runlength + + ADD Count,Count,storeRun + LDRB zigzag,[pZigzagTable,Count] + ADD Count,Count,#1 + STRH storeLevel,[pDst,zigzag] ;// store Level + + B ExitOk + + + +endFillVLD + + + ;// Load Ftype( Escape Mode) value based on the two successive bits in the bitstream + + M_BD_READ8 temp1,1,T1 + CMP temp1,#0 + MOVEQ ftype,#1 + BEQ notEscapemode + M_BD_READ8 temp1,1,T1 + CMP temp1,#1 + MOVEQ ftype,#3 + MOVNE ftype,#2 + + +notEscapemode + + ;// Load optimized packed VLC table with last=0 and Last=1 + + M_LDR pVlcTableL0L1,ppVlcTableL0L1 ;// Load Combined VLC Table + + + CMP ftype,#3 ;// If ftype >=3 get perform Fixed Length Decoding (Escape Mode 3) + BGE EscapeMode3 ;// Else continue normal VLC Decoding + + ;// Variable lengh decoding, "armUnPackVLC32" + + + M_BD_VLD packRetIndex,T1,T2,pVlcTableL0L1,4,2 + + + LDR temp3,=0xFFF + + CMP packRetIndex,temp3 ;// Check for invalid symbol + BEQ ExitError ;// if invalid symbol occurs exit with an error message + + AND Last,packRetIndex,#2 ;// Get Last from packed Index + + + + + LSR storeRun,packRetIndex,#7 ;// Get Run Value from Packed index + AND storeLevel,packRetIndex,#0x7c ;// storeLevel=packRetIndex[2-6],storeLevel[0-1]=0 + + + M_LDR pLMAXTableL0L1,ppLMAXTableL0L1 ;// Load LMAX table + + + LSR storeLevel,storeLevel,#2 ;// Level value + + CMP ftype,#1 + BNE ftype2 + + ;// ftype==1; Escape mode =1 + + + ADD temp1, pLMAXTableL0L1, Last, LSL#4 ;// If the Last=1 add 32 to table address + LDRB temp1,[temp1,storeRun] + + + ADD storeLevel,temp1,storeLevel + +ftype2 + + ;// ftype =2; Escape mode =2 + + M_LDR pRMAXTableL0L1,ppRMAXTableL0L1 ;// Load RMAX Table + + CMP ftype,#2 + BNE FillVLDL1 + + ADD temp1, pRMAXTableL0L1, Last, LSL#4 ;// If Last=1 add 32 to table address + SUB temp2,storeLevel,#1 + LDRB temp1,[temp1,temp2] + + + ADD storeRun,storeRun,#1 + ADD storeRun,temp1 + +FillVLDL1 + + + ;// armVCM4P2_FillVLDBuffer + + M_LDR pZigzagTable,ppZigzagTable ;// Load address of zigzagTable + + M_BD_READ8 sign,1,T1 + + CMP sign,#1 + RSBEQ storeLevel,storeLevel,#0 + + ADD temp1,storeRun,Count ;// Exit with an error message if Run + Count exceeds 63 + CMP temp1,#64 + BGE ExitError + + + + + + + ;// To Reflect Runlenght + + ADD Count,Count,storeRun + +storeLevelL1 + + LDRB zigzag,[pZigzagTable,Count] + CMP Last,#2 ;// Check if the Level val is Last non zero val + ADD Count,Count,#1 + LSR Last,Last,#1 + STRH storeLevel,[pDst,zigzag] + + BNE end + + B ExitOk + + + + ;// Fixed Lengh Decoding Escape Mode 3 + +EscapeMode3 + + M_BD_READ8 Last,1,T1 + M_BD_READ8 storeRun,6,T1 + + ADD temp2,storeRun,Count ;// Exit with an error message if Run + Count exceeds 63 + CMP temp2,#64 + BGE ExitError + + M_BD_READ8 markerbit,1,T1 + TEQ markerbit,#0 ;// Exit with an error message if marker bit is zero + BEQ ExitError + + M_BD_READ16 storeLevel,12,T1 + + TST storeLevel,#0x800 ;// test if the level is negative + SUBNE storeLevel,storeLevel,#4096 + CMP storeLevel,#0 + CMPNE storeLevel,#-2048 + BEQ ExitError ;// Exit with an error message if Level==0 or -2048 + + M_LDR pZigzagTable,ppZigzagTable ;// Load address of zigzagTable + + M_BD_READ8 markerbit,1,T1 + + + ;// armVCM4P2_FillVLDBuffer ( Sign not used as storeLevel is preprocessed) + + + + ;// To Reflect Run Length + + ADD Count,Count,storeRun + + + +storeLevelLast + + LDRB zigzag,[pZigzagTable,Count] + CMP Last,#1 + ADD Count,Count,#1 + STRH storeLevel,[pDst,zigzag] + + BNE end + + B ExitOk + +end + + CMP Count,#64 ;//Run the Loop untill Count reaches 64 + + BLT getVLCbits + + +ExitOk + ;// Exit When VLC Decoding is done Successfully + + ;// Loading ppBitStream and pBitOffset from stack + + CMP Last,#1 + M_LDR ppBitStream,pppBitStream + M_LDR pBitOffset,ppOffset + + ;//Ending the macro + + M_BD_FINI ppBitStream,pBitOffset + + MOVEQ Return,#OMX_Sts_NoErr + MOVNE Return,#OMX_Sts_Err + M_LDR LR,pLinkRegister ;// Load the Link Register Back + B exit2 + +ExitError + ;// Exit When an Error occurs + + M_LDR ppBitStream,pppBitStream + M_LDR pBitOffset,ppOffset + ;//Ending the macro + + M_BD_FINI ppBitStream,pBitOffset + M_LDR LR,pLinkRegister + MOV Return,#OMX_Sts_Err + +exit2 + + + M_END + ENDIF + + END |