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Diffstat (limited to 'media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/comm/src/omxVCCOMM_ExpandFrame_I_s.s')
| -rw-r--r-- | media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/comm/src/omxVCCOMM_ExpandFrame_I_s.s | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/comm/src/omxVCCOMM_ExpandFrame_I_s.s b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/comm/src/omxVCCOMM_ExpandFrame_I_s.s new file mode 100644 index 0000000..02b4b08 --- /dev/null +++ b/media/libstagefright/codecs/on2/h264dec/omxdl/arm11/vc/comm/src/omxVCCOMM_ExpandFrame_I_s.s @@ -0,0 +1,189 @@ +;// +;// +;// File Name: omxVCCOMM_ExpandFrame_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: +;// This function will Expand Frame boundary pixels into Plane +;// +;// + +;// Include standard headers + + INCLUDE omxtypes_s.h + INCLUDE armCOMM_s.h + + M_VARIANTS ARM1136JS + +;// Import symbols required from other files +;// (For example tables) + + +;// Set debugging level +DEBUG_ON SETL {FALSE} + + + + + + + +;// Guarding implementation by the processor name + + IF ARM1136JS + +;//Input Registers + +pSrcDstPlane RN 0 +iFrameWidth RN 1 +iFrameHeight RN 2 +iExpandPels RN 3 + + +;//Output Registers + +result RN 0 + +;//Local Scratch Registers + +iPlaneStep RN 4 +pTop RN 5 +pBottom RN 6 +pBottomIndex RN 7 +x RN 8 +y RN 9 +tempTop RN 10 +tempBot RN 11 +ColStep RN 12 +pLeft RN 5 +pRight RN 6 +pRightIndex RN 7 +tempLeft1 RN 10 +tempRight1 RN 11 +tempLeft2 RN 14 +tempRight2 RN 2 +indexY RN 14 +RowStep RN 12 +expandTo4bytes RN 1 ;// copy a byte to 4 bytes of a word + + ;// Allocate stack memory required by the function + + + ;// Write function header + M_START omxVCCOMM_ExpandFrame_I,r11 + + ;// Define stack arguments + M_ARG iPlaneStepOnStack, 4 + + ;// Load argument from the stack + M_LDR iPlaneStep, iPlaneStepOnStack + + MUL pTop,iExpandPels,iPlaneStep + MLA pBottom,iFrameHeight,iPlaneStep,pSrcDstPlane + SUB x,iFrameWidth,#4 + MOV indexY,pTop + ADD ColStep,indexY,#4 + SUB pBottomIndex,pBottom,iPlaneStep + SUB pTop,pSrcDstPlane,pTop + + + ADD pTop,pTop,x + ADD pBottom,pBottom,x + + ;//------------------------------------------------------------------------ + ;// The following improves upon the C implmentation + ;// The x and y loops are interchanged: This ensures that the values of + ;// pSrcDstPlane [x] and pSrcDstPlane [(iFrameHeight - 1) * iPlaneStep + x] + ;// which depend only on loop variable 'x' are loaded once and used in + ;// multiple stores in the 'Y' loop + ;//------------------------------------------------------------------------ + + ;// xloop +ExpandFrameTopBotXloop + + LDR tempTop,[pSrcDstPlane,x] + ;//------------------------------------------------------------------------ + ;// pSrcDstPlane [(iFrameHeight - 1) * iPlaneStep + x] is simplified as: + ;// pSrcDstPlane + (iFrameHeight * iPlaneStep) - iPlaneStep + x == + ;// pBottom - iPlaneStep + x == pBottomIndex [x] + ;// The value of pBottomIndex is calculated above this 'x' loop + ;//------------------------------------------------------------------------ + LDR tempBot,[pBottomIndex,x] + + ;// yloop + MOV y,iExpandPels + +ExpandFrameTopBotYloop + SUBS y,y,#1 + M_STR tempTop,[pTop],iPlaneStep + M_STR tempBot,[pBottom],iPlaneStep + BGT ExpandFrameTopBotYloop + + SUBS x,x,#4 + SUB pTop,pTop,ColStep + SUB pBottom,pBottom,ColStep + BGE ExpandFrameTopBotXloop + + + ;// y loop + ;// The product is already calculated above : Reuse + ;//MUL indexY,iExpandPels,iPlaneStep + + SUB pSrcDstPlane,pSrcDstPlane,indexY + SUB pLeft,pSrcDstPlane,iExpandPels ;// pLeft->points to the top left of the expanded block + ADD pRight,pSrcDstPlane,iFrameWidth + SUB pRightIndex,pRight,#1 + + ADD y,iFrameHeight,iExpandPels,LSL #1 + LDR expandTo4bytes,=0x01010101 + + RSB RowStep,iExpandPels,iPlaneStep,LSL #1 + + ;// The Y Loop is unrolled twice +ExpandFrameLeftRightYloop + LDRB tempLeft2,[pSrcDstPlane,iPlaneStep] ;// PreLoad the values + LDRB tempRight2,[pRightIndex,iPlaneStep] + M_LDRB tempLeft1,[pSrcDstPlane],iPlaneStep,LSL #1 ;// PreLoad the values + M_LDRB tempRight1,[pRightIndex],iPlaneStep,LSL #1 + + SUB x,iExpandPels,#4 + MUL tempLeft2,tempLeft2,expandTo4bytes ;// Copy the single byte to 4 bytes + MUL tempRight2,tempRight2,expandTo4bytes + MUL tempLeft1,tempLeft1,expandTo4bytes ;// Copy the single byte to 4 bytes + MUL tempRight1,tempRight1,expandTo4bytes + + + ;// x loop +ExpandFrameLeftRightXloop + SUBS x,x,#4 + STR tempLeft2,[pLeft,iPlaneStep] ;// Store the 4 bytes at one go + STR tempRight2,[pRight,iPlaneStep] + STR tempLeft1,[pLeft],#4 ;// Store the 4 bytes at one go + STR tempRight1,[pRight],#4 + BGE ExpandFrameLeftRightXloop + + SUBS y,y,#2 + ADD pLeft,pLeft,RowStep + ADD pRight,pRight,RowStep + BGT ExpandFrameLeftRightYloop + + + ;// Set return value + + MOV result,#OMX_Sts_NoErr +End + + ;// Write function tail + + M_END + + ENDIF ;//ARM1136JS + + + END
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