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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraACVLC_s.s')
| -rw-r--r-- | media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraACVLC_s.s | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraACVLC_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraACVLC_s.s new file mode 100644 index 0000000..166729e --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/m4p2/src/omxVCM4P2_DecodeVLCZigzag_IntraACVLC_s.s @@ -0,0 +1,136 @@ +;/** +; * +; * File Name: omxVCM4P2_DecodeVLCZigzag_IntraACVLC_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 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 ARM1136JS + + + + + + IF ARM1136JS + + ;// 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 Zigzag table entries with double the original values + IMPORT armVCM4P2_DecodeVLCZigzag_AC_unsafe + +;//Input Arguments + +ppBitStream RN 0 +pBitOffset RN 1 +pDst RN 2 +PredDir RN 3 +shortVideoHeader RN 3 + +;//Local Variables + +Return RN 0 + +pVlcTableL0L1 RN 4 +pLMAXTableL0L1 RN 4 +pRMAXTableL0L1 RN 4 +pZigzagTable RN 4 +Count RN 6 + + + + ;// 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_START omxVCM4P2_DecodeVLCZigzag_IntraACVLC,r12 + + M_ARG shortVideoHeaderonStack,4 ;// pointer to Input Argument on stack + + LDR pZigzagTable, =armVCM4P2_aClassicalZigzagScan ;// Load Address of the Zigzag table + ADD pZigzagTable, pZigzagTable, PredDir, LSL #6 ;// Loading Different type of zigzag tables based on PredDir + + M_STR pZigzagTable,ppZigzagTable ;// Store Zigzag table address on stack + LDR pVlcTableL0L1, =armVCM4P2_IntraVlcL0L1 ;// Load optimized packed VLC Table with both L=0 and L=1 entries + M_STR pVlcTableL0L1,ppVlcTableL0L1 ;// Store VLC Table address on stack + LDR pLMAXTableL0L1, =armVCM4P2_IntraL0L1LMAX ;// Load LMAX Table + M_STR pLMAXTableL0L1,ppLMAXTableL0L1 ;// Store LMAX Table address on Stack + LDR pRMAXTableL0L1, =armVCM4P2_IntraL0L1RMAX ;// Load RMAX Table + MOV Count,#0 ;// Set Start=0 + + M_STR pRMAXTableL0L1,ppRMAXTableL0L1 ;// Store RMAX Table address on stack + + + + M_LDR shortVideoHeader,shortVideoHeaderonStack ;// get the Input Argument from stack + + BL armVCM4P2_DecodeVLCZigzag_AC_unsafe ;// Call Unsafe Function + + + + + M_END + ENDIF + + END |