omxVCM4P2_EncodeVLCZigzag_Inter.c revision 0c1bc742181ded4930842b46e9507372f0b1b963
10c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: omxVCM4P2_EncodeVLCZigzag_Inter.c 40c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 50c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 60c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 70c1bc742181ded4930842b46e9507372f0b1b963James Dong * 80c1bc742181ded4930842b46e9507372f0b1b963James Dong * (c) Copyright 2007-2008 ARM Limited. All Rights Reserved. 90c1bc742181ded4930842b46e9507372f0b1b963James Dong * 100c1bc742181ded4930842b46e9507372f0b1b963James Dong * 110c1bc742181ded4930842b46e9507372f0b1b963James Dong * 120c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 130c1bc742181ded4930842b46e9507372f0b1b963James Dong * Contains modules for zigzag scanning and VLC encoding 140c1bc742181ded4930842b46e9507372f0b1b963James Dong * for inter block. 150c1bc742181ded4930842b46e9507372f0b1b963James Dong * 160c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 170c1bc742181ded4930842b46e9507372f0b1b963James Dong 180c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 190c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 200c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 210c1bc742181ded4930842b46e9507372f0b1b963James Dong 220c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 230c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM_Bitstream.h" 240c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 250c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_Huff_Tables_VLC.h" 260c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_ZigZag_Tables.h" 270c1bc742181ded4930842b46e9507372f0b1b963James Dong 280c1bc742181ded4930842b46e9507372f0b1b963James Dong 290c1bc742181ded4930842b46e9507372f0b1b963James Dong 300c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P2_EncodeVLCZigzag_Inter (6.2.4.5.3) 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs classical zigzag scanning and VLC encoding for one inter block. 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - pointer to the pointer to the current byte in the bit 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * stream 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - pointer to the bit position in the byte pointed by 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * *ppBitStream. Valid within 0 to 7 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * pQDctBlkCoef - pointer to the quantized DCT coefficient 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * pattern - block pattern which is used to decide whether this block is 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * encoded 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader - binary flag indicating presence of 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * short_video_header; escape modes 0-3 are used if 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==0, and escape mode 4 is used when 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==1. 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - *ppBitStream is updated after the block is encoded so that 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * it points to the current byte in the bit stream buffer. 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - *pBitOffset is updated so that it points to the current bit 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * position in the byte pointed by *ppBitStream. 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * 590c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr - no error 600c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - Bad arguments 610c1bc742181ded4930842b46e9507372f0b1b963James Dong * - At least one of the pointers: is NULL: ppBitStream, *ppBitStream, 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset, pQDctBlkCoef 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * - *pBitOffset < 0, or *pBitOffset >7. 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * 650c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 660c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P2_EncodeVLCZigzag_Inter( 670c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 **ppBitStream, 680c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT * pBitOffset, 690c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_S16 *pQDctBlkCoef, 700c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 pattern, 710c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader 720c1bc742181ded4930842b46e9507372f0b1b963James Dong) 730c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 740c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 start = 0; 750c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 *pZigzagTable = armVCM4P2_aClassicalZigzagScan; 760c1bc742181ded4930842b46e9507372f0b1b963James Dong 770c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 780c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr); 790c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr); 800c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr); 810c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pQDctBlkCoef == NULL, OMX_Sts_BadArgErr); 820c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((*pBitOffset < 0) || (*pBitOffset >7), OMX_Sts_BadArgErr); 830c1bc742181ded4930842b46e9507372f0b1b963James Dong 840c1bc742181ded4930842b46e9507372f0b1b963James Dong if (pattern) 850c1bc742181ded4930842b46e9507372f0b1b963James Dong { 860c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_PutVLCBits ( 870c1bc742181ded4930842b46e9507372f0b1b963James Dong ppBitStream, 880c1bc742181ded4930842b46e9507372f0b1b963James Dong pBitOffset, 890c1bc742181ded4930842b46e9507372f0b1b963James Dong pQDctBlkCoef, 900c1bc742181ded4930842b46e9507372f0b1b963James Dong shortVideoHeader, 910c1bc742181ded4930842b46e9507372f0b1b963James Dong start, 920c1bc742181ded4930842b46e9507372f0b1b963James Dong 26, 930c1bc742181ded4930842b46e9507372f0b1b963James Dong 40, 940c1bc742181ded4930842b46e9507372f0b1b963James Dong 10, 950c1bc742181ded4930842b46e9507372f0b1b963James Dong 1, 960c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RunIdx, 970c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL0, 980c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RunIdx, 990c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL1, 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0LMAX, 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1LMAX, 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RMAX, 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RMAX, 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong ); 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong } /* Pattern check ends*/ 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 113