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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_s.s')
| -rwxr-xr-x | media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_s.s | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_s.s new file mode 100755 index 0000000..778aaf2 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm_neon/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_s.s @@ -0,0 +1,224 @@ +;/** +; * +; * File Name: omxVCM4P2_DecodeVLCZigzag_IntraDCVLC_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 block. +; * +; * +; * +; * Function: omxVCM4P2_DecodeVLCZigzag_Inter +; * +; * Description: +; * Performs VLC decoding and inverse zigzag scan for one intra coded block. +; * +; * Remarks: +; * +; * Parameters: +; * [in] ppBitStream pointer to the pointer to the current byte in +; * the bitstream buffer +; * [in] pBitOffset pointer to the bit position in the byte pointed +; * to by *ppBitStream. *pBitOffset is valid within [0-7]. +; * [in] shortVideoHeader binary flag indicating presence of short_video_header; +; * escape modes 0-3 are used if shortVideoHeader==0, +; * and escape mode 4 is used when shortVideoHeader==1. +; * [out] ppBitStream *ppBitStream is updated after the block is +; * decoded, so that it points to the current byte +; * in the bit stream buffer +; * [out] pBitOffset *pBitOffset is updated so that it points to the +; * current bit position in the byte pointed by +; * *ppBitStream +; * [out] pDst pointer to the coefficient buffer of current +; * block. Must be 16-byte aligned +; * +; * Return Value: +; * OMX_Sts_BadArgErr - bad arguments +; * -At least one of the following pointers is NULL: ppBitStream, *ppBitStream, pBitOffset, pDst, or +; * -pDst is not 16-byte aligned, or +; * -*pBitOffset exceeds [0,7]. +; * OMX_Sts_Err - status error +; * -At least one mark bit is equal to zero +; * -Encountered an illegal stream code that cannot be found in the VLC table +; * -Encountered and illegal code in the VLC FLC table +; * -The number of coefficients is greater than 64 +; * +; */ + + + INCLUDE omxtypes_s.h + INCLUDE armCOMM_s.h + INCLUDE armCOMM_BitDec_s.h + + + M_VARIANTS CortexA8 + + + + + + IF CortexA8 + + + ;// Import various tables needed for the function + + + IMPORT armVCM4P2_IntraVlcL0L1 ;// Contains optimized and packed VLC Tables for both Last =1 and last=0 + ;// Packed in Run:Level:Last format + IMPORT armVCM4P2_IntraL0L1LMAX ;// Contains LMAX table entries with both Last=0 and Last=1 + IMPORT armVCM4P2_IntraL0L1RMAX ;// Contains RMAX table entries with both Last=0 and Last=1 + IMPORT armVCM4P2_aClassicalZigzagScan ;// contains CLassical, Horizontal, Vertical Zigzag table entries with double the original values + IMPORT armVCM4P2_aIntraDCLumaChromaIndex ;// Contains Optimized DCLuma and DCChroma Index table Entries + + + IMPORT armVCM4P2_DecodeVLCZigzag_AC_unsafe + +;//Input Arguments + +ppBitStream RN 0 +pBitOffset RN 1 +pDst RN 2 +PredDir RN 3 +shortVideoHeader RN 3 +videoComp RN 5 +;//Local Variables + +Return RN 0 + +pDCLumaChromaIndex RN 4 +pDCChromaIndex RN 7 +pVlcTableL0L1 RN 4 +pLMAXTableL0L1 RN 4 +pRMAXTableL0L1 RN 4 +pZigzagTable RN 4 +Count RN 6 +DCValueSize RN 6 +powOfSize RN 7 +temp1 RN 5 + + +;// Scratch Registers + +RBitStream RN 8 +RBitBuffer RN 9 +RBitCount RN 10 + +T1 RN 11 +T2 RN 12 +DCVal RN 14 + + + ;// Allocate stack memory to store optimized VLC,Zigzag, RMAX, LMAX Table Addresses + + M_ALLOC4 ppVlcTableL0L1,4 + M_ALLOC4 ppLMAXTableL0L1,4 + M_ALLOC4 ppRMAXTableL0L1,4 + M_ALLOC4 ppZigzagTable,4 + M_ALLOC4 pDCCoeff,4 + + + + M_START omxVCM4P2_DecodeVLCZigzag_IntraDCVLC,r12 + + M_ARG shortVideoHeaderonStack,4 ;// Pointer to argument on stack + M_ARG videoComponstack,4 ;// Pointer to argument on stack + + + ;// Decode DC Coefficient + + + LDR pDCLumaChromaIndex, =armVCM4P2_aIntraDCLumaChromaIndex ;// Load Optimized VLC Table for Luminance and Chrominance + + ;// Initializing the Bitstream Macro + + M_BD_INIT0 ppBitStream, pBitOffset, RBitStream, RBitBuffer, RBitCount + M_LDR videoComp,videoComponstack + M_BD_INIT1 T1, T2, T2 + ADD pDCLumaChromaIndex,pDCLumaChromaIndex,videoComp, LSL #6 + M_BD_INIT2 T1, T2, T2 + + + M_BD_VLD DCValueSize,T1,T2,pDCLumaChromaIndex,4,2 ;// VLC Decode using optimized Luminance and Chrominance VLC Table + + + + +DecodeDC + + CMP DCValueSize,#12 + BGT ExitError + + CMP DCValueSize,#0 + MOVEQ DCVal,#0 ;// If DCValueSize is zero then DC coeff =0 + BEQ ACDecode ;// Branch to perform AC Coeff Decoding + + M_BD_VREAD16 DCVal,DCValueSize,T1,T2 ;// Get DC Value From Bit stream + + + MOV powOfSize,#1 + LSL powOfSize,DCValueSize ;// powOfSize=pow(2,DCValueSize) + CMP DCVal,powOfSize,LSR #1 ;// Compare DCVal with powOfSize/2 + ADDLT DCVal,DCVal,#1 + SUBLT DCVal,DCVal,powOfSize ;// If Lessthan powOfSize/2 DCVal=DCVal-powOfSize+1 + ;// Else DCVal= fetchbits from bit stream + +CheckDCValueSize + + CMP DCValueSize,#8 ;// If DCValueSize greater than 8 check marker bit + + BLE ACDecode + + M_BD_READ8 temp1,1,T1 + TEQ temp1,#0 ;// If Marker bit is zero Exit with an Error Message + BEQ ExitError + + + + ;// Decode AC Coefficient + +ACDecode + + M_STR DCVal,pDCCoeff ;// Store Decoded DC Coeff on Stack + M_BD_FINI ppBitStream,pBitOffset ;// Terminating the Bit stream Macro + + LDR pZigzagTable, =armVCM4P2_aClassicalZigzagScan ;// Load Zigzag talbe address + ADD pZigzagTable, pZigzagTable, PredDir, LSL #6 ;// Modify the Zigzag table adress based on PredDir + + M_STR pZigzagTable,ppZigzagTable ;// Store zigzag table on stack + LDR pVlcTableL0L1, =armVCM4P2_IntraVlcL0L1 ;// Load Optimized VLC Table With both Last=0 and Last=1 Entries + M_STR pVlcTableL0L1,ppVlcTableL0L1 ;// Store Optimized VLC Table on stack + LDR pLMAXTableL0L1, =armVCM4P2_IntraL0L1LMAX ;// Load LMAX Table + M_STR pLMAXTableL0L1,ppLMAXTableL0L1 ;// Store LMAX table on stack + LDR pRMAXTableL0L1, =armVCM4P2_IntraL0L1RMAX ;// Load RMAX Table + MOV Count,#1 ;// Set Start =1 + + M_STR pRMAXTableL0L1,ppRMAXTableL0L1 ;// Store RMAX Table on Stack + + + M_LDR shortVideoHeader,shortVideoHeaderonStack ;// Load the Input Argument From Stack + + BL armVCM4P2_DecodeVLCZigzag_AC_unsafe ;// Call the Unsafe Function + + M_LDR DCVal,pDCCoeff ;// Get the Decoded DC Value From Stack + STRH DCVal,[pDst] ;// Store the DC Value + B ExitOK + + + +ExitError + + M_BD_FINI ppBitStream,pBitOffset ;// Terminating the Bit Stream Macro in case of an Error + MOV Return,#OMX_Sts_Err ;// Exit with an Error Message +ExitOK + + M_END + ENDIF + + END |