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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p10/src/armVCM4P10_DecodeCoeffsToPair_s.s')
| -rwxr-xr-x | media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p10/src/armVCM4P10_DecodeCoeffsToPair_s.s | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p10/src/armVCM4P10_DecodeCoeffsToPair_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p10/src/armVCM4P10_DecodeCoeffsToPair_s.s new file mode 100755 index 0000000..10a89e9 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p10/src/armVCM4P10_DecodeCoeffsToPair_s.s @@ -0,0 +1,325 @@ +;// +;// +;// File Name: armVCM4P10_DecodeCoeffsToPair_s.s +;// OpenMAX DL: v1.0.2 +;// Revision: 12290 +;// Date: Wednesday, April 9, 2008 +;// +;// (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. +;// +;// +;// + + INCLUDE omxtypes_s.h + INCLUDE armCOMM_s.h + INCLUDE armCOMM_BitDec_s.h + + IMPORT armVCM4P10_CAVLCCoeffTokenTables + IMPORT armVCM4P10_CAVLCTotalZeroTables + IMPORT armVCM4P10_CAVLCTotalZeros2x2Tables + IMPORT armVCM4P10_CAVLCRunBeforeTables + IMPORT armVCM4P10_SuffixToLevel + IMPORT armVCM4P10_ZigZag_4x4 + IMPORT armVCM4P10_ZigZag_2x2 + + M_VARIANTS ARM1136JS + +;//DEBUG_ON SETL {TRUE} + +LAST_COEFF EQU 0x20 ;// End of block flag +TWO_BYTE_COEFF EQU 0x10 + +;// Declare input registers + +ppBitStream RN 0 +pOffset RN 1 +pNumCoeff RN 2 +ppPosCoefbuf RN 3 +nC RN 4 ;// number of coeffs or 17 for chroma +sMaxNumCoeff RN 5 + +;// Declare inner loop registers + +;// Level loop +Count RN 0 +TrailingOnes RN 1 +pLevel RN 2 +LevelSuffix RN 3 +SuffixLength RN 4 +TotalCoeff RN 5 + +pVLDTable RN 6 +Symbol RN 7 +T1 RN 8 +T2 RN 9 +RBitStream RN 10 +RBitBuffer RN 11 +RBitCount RN 12 +lr RN 14 + +;// Run loop +Count RN 0 +ZerosLeft RN 1 +pLevel RN 2 +ppRunTable RN 3 +pRun RN 4 +TotalCoeff RN 5 + +pVLDTable RN 6 +Symbol RN 7 +T1 RN 8 +T2 RN 9 +RBitStream RN 10 +RBitBuffer RN 11 +RBitCount RN 12 +lr RN 14 + +;// Fill in coefficients loop +pPosCoefbuf RN 0 +temp RN 1 +pLevel RN 2 +ppPosCoefbuf RN 3 +pRun RN 4 +TotalCoeff RN 5 +pZigZag RN 6 + +T1 RN 8 +T2 RN 9 +RBitStream RN 10 +RBitBuffer RN 11 +RBitCount RN 12 +CoeffNum RN 14 + + + + IF ARM1136JS + + ;// Allocate stack memory required by the function + M_ALLOC4 pppBitStream, 4 + M_ALLOC4 ppOffset, 4 + M_ALLOC4 pppPosCoefbuf, 4 + M_ALLOC4 ppLevel, 16*2 + M_ALLOC4 ppRun, 16 + + ;// Write function header + M_START armVCM4P10_DecodeCoeffsToPair, r11 + + ;// Define stack arguments + M_ARG pNC, 4 + M_ARG pSMaxNumCoeff,4 + + ;// Code start + M_BD_INIT0 ppBitStream, pOffset, RBitStream, RBitBuffer, RBitCount + LDR pVLDTable, =armVCM4P10_CAVLCCoeffTokenTables + M_LDR nC, pNC + + M_BD_INIT1 T1, T2, lr + LDR pVLDTable, [pVLDTable, nC, LSL #2] ;// Find VLD table + + M_BD_INIT2 T1, T2, lr + + ;// Decode Symbol = TotalCoeff*4 + TrailingOnes + M_BD_VLD Symbol, T1, T2, pVLDTable, 4, 2 + + MOVS TotalCoeff, Symbol, LSR #2 + STRB TotalCoeff, [pNumCoeff] + M_PRINTF "TotalCoeff=%d\n", TotalCoeff + BEQ.W EndNoError ;// Finished if no coefficients + + CMP Symbol, #17*4 + BGE.W EndBadSymbol ;// Error if bad symbol + + ;// Save bitstream pointers + M_STR ppBitStream, pppBitStream + M_STR pOffset, ppOffset + M_STR ppPosCoefbuf, pppPosCoefbuf + + ;// Decode Trailing Ones + ANDS TrailingOnes, Symbol, #3 + M_ADR pLevel, ppLevel + M_PRINTF "TrailingOnes=%d\n", TrailingOnes + BEQ TrailingOnesDone + MOV Count, TrailingOnes +TrailingOnesLoop + M_BD_READ8 Symbol, 1, T1 + SUBS Count, Count, #1 + MOV T1, #1 + SUB T1, T1, Symbol, LSL #1 + M_PRINTF "Level=%d\n", T1 + STRH T1, [pLevel], #2 + BGT TrailingOnesLoop +TrailingOnesDone + + ;// Decode level values + SUBS Count, TotalCoeff, TrailingOnes ;// Number of levels to read + BEQ DecodeRuns ;// None left + + MOV SuffixLength, #1 + CMP TotalCoeff, #10 + MOVLE SuffixLength, #0 + CMP TrailingOnes, #3 ;// if (TrailingOnes<3) + MOVLT TrailingOnes, #4 ;// then TrailingOnes = +4 + MOVGE TrailingOnes, #2 ;// else TrailingOnes = +2 + MOVGE SuffixLength, #0 ;// SuffixLength = 0 + +LevelLoop + M_BD_CLZ16 Symbol, T1, T2 ;// Symbol=LevelPrefix + CMP Symbol,#16 + BGE EndBadSymbol + + MOVS lr, SuffixLength ;// if LevelSuffixSize==0 + TEQEQ Symbol, #14 ;// and LevelPrefix==14 + MOVEQ lr, #4 ;// then LevelSuffixSize=4 + TEQ Symbol, #15 ;// if LevelSuffixSize==15 + MOVEQ lr, #12 ;// then LevelSuffixSize=12 + + TEQEQ SuffixLength,#0 + ADDEQ Symbol,Symbol,#15 + + TEQ lr, #0 ;// if LevelSuffixSize==0 + BEQ LevelCodeRead ;// LevelCode = LevelPrefix + + M_BD_VREAD16 LevelSuffix, lr, T1, T2 ;// Read Level Suffix + + MOV Symbol, Symbol, LSL SuffixLength + ADD Symbol, LevelSuffix, Symbol + +LevelCodeRead + ;// Symbol = LevelCode + ADD Symbol, Symbol, TrailingOnes ;// +4 if level cannot be +/-1, +2 o/w + MOV TrailingOnes, #2 + MOVS T1, Symbol, LSR #1 + RSBCS T1, T1, #0 ;// If Symbol odd then negate + M_PRINTF "Level=%d\n", T1 + STRH T1, [pLevel], #2 ;// Store level. + + LDR T2, =armVCM4P10_SuffixToLevel + LDRSB T1, [T2, SuffixLength] ;// Find increment level + TEQ SuffixLength, #0 + MOVEQ SuffixLength, #1 + CMP Symbol, T1 + ADDCS SuffixLength, SuffixLength, #1 + SUBS Count, Count, #1 + BGT LevelLoop + +DecodeRuns + ;// Find number of zeros + M_LDR T1, pSMaxNumCoeff ;// sMaxNumCoeff + SUB Count, TotalCoeff, #1 ;// Number of runs excluding last + SUBS ZerosLeft, T1, TotalCoeff ;// Maximum number of zeros there could be + M_ADR pRun, ppRun + MOV CoeffNum,TotalCoeff + SUB CoeffNum,CoeffNum,#1 + BEQ NoZerosLeft + + ;// Unpack number of zeros from bitstream + TEQ T1, #4 + LDREQ pVLDTable, =(armVCM4P10_CAVLCTotalZeros2x2Tables-4) + LDRNE pVLDTable, =(armVCM4P10_CAVLCTotalZeroTables-4) + LDR pVLDTable, [pVLDTable, TotalCoeff, LSL #2] + + M_BD_VLD Symbol, T1, T2, pVLDTable, 4, 2 ;// Symbol = ZerosLeft + CMP Symbol,#16 + BGE EndBadSymbol + + LDR ppRunTable, =(armVCM4P10_CAVLCRunBeforeTables-4) + M_ADR pRun, ppRun + MOVS ZerosLeft, Symbol + + ADD CoeffNum,CoeffNum,ZerosLeft + + BEQ NoZerosLeft + + ;// Decode runs while zeros are left and more than one coefficient +RunLoop + SUBS Count, Count, #1 + LDR pVLDTable, [ppRunTable, ZerosLeft, LSL#2] + BLT LastRun + M_BD_VLD Symbol, T1, T2, pVLDTable, 3, 2 ;// Symbol = Run + CMP Symbol,#15 + BGE EndBadSymbol + + SUBS ZerosLeft, ZerosLeft, Symbol + M_PRINTF "Run=%d\n", Symbol + STRB Symbol, [pRun], #1 + BGT RunLoop + + ;// Decode runs while no zeros are left +NoZerosLeft + SUBS Count, Count, #1 + M_PRINTF "Run=%d\n", ZerosLeft + STRGEB ZerosLeft, [pRun], #1 + BGT NoZerosLeft + +LastRun + ;// Final run length is remaining zeros + M_PRINTF "LastRun=%d\n", ZerosLeft + STRB ZerosLeft, [pRun], #1 + + ;// Write coefficients to output array + M_LDR T1, pSMaxNumCoeff ;// sMaxNumCoeff + TEQ T1, #15 + ADDEQ CoeffNum,CoeffNum,#1 + + + SUB pRun,pRun,TotalCoeff + SUB pLevel,pLevel,TotalCoeff + SUB pLevel,pLevel,TotalCoeff + + M_LDR ppPosCoefbuf, pppPosCoefbuf + LDR pPosCoefbuf, [ppPosCoefbuf] + TEQ T1, #4 + LDREQ pZigZag, =armVCM4P10_ZigZag_2x2 + LDRNE pZigZag, =armVCM4P10_ZigZag_4x4 + + + +OutputLoop + + LDRB T2, [pRun],#1 + LDRB T1, [pZigZag, CoeffNum] + SUB CoeffNum, CoeffNum, #1 ;// Skip Non zero + SUB CoeffNum, CoeffNum, T2 ;// Skip Zero run + + LDRSH T2, [pLevel],#2 + + SUBS TotalCoeff, TotalCoeff, #1 + ORREQ T1, T1, #LAST_COEFF + + ADD temp, T2, #128 + CMP temp, #256 + ORRCS T1, T1, #TWO_BYTE_COEFF + + + TEQ TotalCoeff, #0 ;// Preserves carry + + M_PRINTF "Output=%02x %04x\n", T1, T2 + STRB T1, [pPosCoefbuf], #1 + STRB T2, [pPosCoefbuf], #1 + MOV T2, T2, LSR #8 + STRCSB T2, [pPosCoefbuf], #1 + BNE OutputLoop + + ;// Finished + STR pPosCoefbuf, [ppPosCoefbuf] + M_LDR ppBitStream, pppBitStream + M_LDR pOffset, ppOffset + B EndNoError + +EndBadSymbol + MOV r0, #OMX_Sts_Err + B End + +EndNoError + ;// Finished reading from the bitstream + M_BD_FINI ppBitStream, pOffset + + ;// Set return value + MOV r0, #OMX_Sts_NoErr +End + M_END + + ENDIF + + END + |