178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar/* 278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Copyright (C) 2007-2008 ARM Limited 378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Licensed under the Apache License, Version 2.0 (the "License"); 578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * you may not use this file except in compliance with the License. 678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * You may obtain a copy of the License at 778e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 878e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * http://www.apache.org/licenses/LICENSE-2.0 978e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1078e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * Unless required by applicable law or agreed to in writing, software 1178e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * distributed under the License is distributed on an "AS IS" BASIS, 1278e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1378e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * See the License for the specific language governing permissions and 1478e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * limitations under the License. 1578e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar * 1678e52bfac041d71ce53b5b13c2abf78af742b09dLajos Molnar */ 170c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 180c1bc742181ded4930842b46e9507372f0b1b963James Dong * 190c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: armVCM4P2_DecodeVLCZigzag_intra.c 200c1bc742181ded4930842b46e9507372f0b1b963James Dong * OpenMAX DL: v1.0.2 210c1bc742181ded4930842b46e9507372f0b1b963James Dong * Revision: 9641 220c1bc742181ded4930842b46e9507372f0b1b963James Dong * Date: Thursday, February 7, 2008 230c1bc742181ded4930842b46e9507372f0b1b963James Dong * 240c1bc742181ded4930842b46e9507372f0b1b963James Dong * 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * Contains modules for filling of the coefficient buffer 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * 300c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 310c1bc742181ded4930842b46e9507372f0b1b963James Dong 320c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 330c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 340c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 350c1bc742181ded4930842b46e9507372f0b1b963James Dong 360c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 370c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM_Bitstream.h" 380c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 390c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_Huff_Tables_VLC.h" 400c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_ZigZag_Tables.h" 410c1bc742181ded4930842b46e9507372f0b1b963James Dong 420c1bc742181ded4930842b46e9507372f0b1b963James Dong 430c1bc742181ded4930842b46e9507372f0b1b963James Dong 440c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: armVCM4P2_DecodeVLCZigzag_Intra 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs VLC decoding and inverse zigzag scan for one intra coded block. 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * Remarks: 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * Parameters: 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] ppBitStream pointer to the pointer to the current byte in 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * the bitstream buffer 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] pBitOffset pointer to the bit position in the byte pointed 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * to by *ppBitStream. *pBitOffset is valid within 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * [0-7]. 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] predDir AC prediction direction which is used to decide 590c1bc742181ded4930842b46e9507372f0b1b963James Dong * the zigzag scan pattern. It takes one of the 600c1bc742181ded4930842b46e9507372f0b1b963James Dong * following values: 610c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_VC_NONE AC prediction not used; 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * perform classical zigzag scan; 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_VC_HORIZONTAL Horizontal prediction; 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * perform alternate-vertical 650c1bc742181ded4930842b46e9507372f0b1b963James Dong * zigzag scan; 660c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_VC_VERTICAL Vertical prediction; 670c1bc742181ded4930842b46e9507372f0b1b963James Dong * thus perform 680c1bc742181ded4930842b46e9507372f0b1b963James Dong * alternate-horizontal 690c1bc742181ded4930842b46e9507372f0b1b963James Dong * zigzag scan. 700c1bc742181ded4930842b46e9507372f0b1b963James Dong * [in] start start indicates whether the encoding begins with 0th element 710c1bc742181ded4930842b46e9507372f0b1b963James Dong * or 1st. 720c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] ppBitStream *ppBitStream is updated after the block is 730c1bc742181ded4930842b46e9507372f0b1b963James Dong * decoded, so that it points to the current byte 740c1bc742181ded4930842b46e9507372f0b1b963James Dong * in the bit stream buffer 750c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pBitOffset *pBitOffset is updated so that it points to the 760c1bc742181ded4930842b46e9507372f0b1b963James Dong * current bit position in the byte pointed by 770c1bc742181ded4930842b46e9507372f0b1b963James Dong * *ppBitStream 780c1bc742181ded4930842b46e9507372f0b1b963James Dong * [out] pDst pointer to the coefficient buffer of current 790c1bc742181ded4930842b46e9507372f0b1b963James Dong * block. Should be 32-bit aligned 800c1bc742181ded4930842b46e9507372f0b1b963James Dong * 810c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 820c1bc742181ded4930842b46e9507372f0b1b963James Dong * Standard OMXResult result. See enumeration for possible result codes. 830c1bc742181ded4930842b46e9507372f0b1b963James Dong * 840c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 850c1bc742181ded4930842b46e9507372f0b1b963James Dong 860c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult armVCM4P2_DecodeVLCZigzag_Intra( 870c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 ** ppBitStream, 880c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT * pBitOffset, 890c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 * pDst, 900c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 predDir, 910c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader, 920c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 start 930c1bc742181ded4930842b46e9507372f0b1b963James Dong) 940c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 950c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 last = 0; 960c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 *pZigzagTable = armVCM4P2_aClassicalZigzagScan; 970c1bc742181ded4930842b46e9507372f0b1b963James Dong OMXResult errorCode; 980c1bc742181ded4930842b46e9507372f0b1b963James Dong 990c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr); 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr); 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr); 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr); 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(!armIs4ByteAligned(pDst), OMX_Sts_BadArgErr); 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((*pBitOffset < 0) || (*pBitOffset >7), OMX_Sts_BadArgErr); 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((predDir > 2), OMX_Sts_BadArgErr); 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong switch (predDir) 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong case OMX_VC_NONE: 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable = armVCM4P2_aClassicalZigzagScan; 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong break; 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong case OMX_VC_HORIZONTAL: 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable = armVCM4P2_aVerticalZigzagScan; 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong break; 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong case OMX_VC_VERTICAL: 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable = armVCM4P2_aHorizontalZigzagScan; 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong break; 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1270c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1280c1bc742181ded4930842b46e9507372f0b1b963James Dong 1290c1bc742181ded4930842b46e9507372f0b1b963James Dong errorCode = armVCM4P2_GetVLCBits ( 1300c1bc742181ded4930842b46e9507372f0b1b963James Dong ppBitStream, 1310c1bc742181ded4930842b46e9507372f0b1b963James Dong pBitOffset, 1320c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst, 1330c1bc742181ded4930842b46e9507372f0b1b963James Dong shortVideoHeader, 1340c1bc742181ded4930842b46e9507372f0b1b963James Dong start, 1350c1bc742181ded4930842b46e9507372f0b1b963James Dong &last, 1360c1bc742181ded4930842b46e9507372f0b1b963James Dong 10, 1370c1bc742181ded4930842b46e9507372f0b1b963James Dong 62, 1380c1bc742181ded4930842b46e9507372f0b1b963James Dong 7, 1390c1bc742181ded4930842b46e9507372f0b1b963James Dong 21, 1400c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL0RunIdx, 1410c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraVlcL0, 1420c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL1RunIdx, 1430c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraVlcL1, 1440c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL0LMAX, 1450c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL1LMAX, 1460c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL0RMAX, 1470c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_IntraL1RMAX, 1480c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable ); 1490c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode); 1500c1bc742181ded4930842b46e9507372f0b1b963James Dong 1510c1bc742181ded4930842b46e9507372f0b1b963James Dong if (last == 0) 1520c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1530c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_Err; 1540c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1550c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1560c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1570c1bc742181ded4930842b46e9507372f0b1b963James Dong 1580c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 1590c1bc742181ded4930842b46e9507372f0b1b963James Dong 160