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: omxVCM4P2_DecodeVLCZigzag_Inter.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 zigzag scanning and VLC decoding 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * for inter block. 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * 310c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 320c1bc742181ded4930842b46e9507372f0b1b963James Dong 330c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 340c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 350c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 360c1bc742181ded4930842b46e9507372f0b1b963James Dong 370c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVC.h" 380c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM_Bitstream.h" 390c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 400c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_Huff_Tables_VLC.h" 410c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armVCM4P2_ZigZag_Tables.h" 420c1bc742181ded4930842b46e9507372f0b1b963James Dong 430c1bc742181ded4930842b46e9507372f0b1b963James Dong 440c1bc742181ded4930842b46e9507372f0b1b963James Dong 450c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P2_DecodeVLCZigzag_Inter (6.2.5.2.3) 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs VLC decoding and inverse zigzag scan for one inter-coded block. 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - double pointer to the current byte in the stream buffer 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - pointer to the next available bit in the current stream 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * byte referenced by *ppBitStream. The parameter *pBitOffset is 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * valid within the range [0-7]. 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader - binary flag indicating presence of 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * short_video_header; escape modes 0-3 are used if 590c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==0, and escape mode 4 is used when 600c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==1. 610c1bc742181ded4930842b46e9507372f0b1b963James Dong * 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - *ppBitStream is updated after the block is decoded such 650c1bc742181ded4930842b46e9507372f0b1b963James Dong * that it points to the current byte in the stream buffer 660c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - *pBitOffset is updated after decoding such that it points 670c1bc742181ded4930842b46e9507372f0b1b963James Dong * to the next available bit in the stream byte referenced by 680c1bc742181ded4930842b46e9507372f0b1b963James Dong * *ppBitStream 690c1bc742181ded4930842b46e9507372f0b1b963James Dong * pDst - pointer to the coefficient buffer of current block; must be 700c1bc742181ded4930842b46e9507372f0b1b963James Dong * 4-byte aligned. 710c1bc742181ded4930842b46e9507372f0b1b963James Dong * 720c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 730c1bc742181ded4930842b46e9507372f0b1b963James Dong * 740c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - bad arguments: 750c1bc742181ded4930842b46e9507372f0b1b963James Dong * - At least one of the following pointers is NULL: 760c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream, *ppBitStream, pBitOffset, pDst 770c1bc742181ded4930842b46e9507372f0b1b963James Dong * - pDst is not 4-byte aligned 780c1bc742181ded4930842b46e9507372f0b1b963James Dong * - *pBitOffset exceeds [0,7] 790c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_Err - status error, if: 800c1bc742181ded4930842b46e9507372f0b1b963James Dong * - At least one mark bit is equal to zero 810c1bc742181ded4930842b46e9507372f0b1b963James Dong * - Encountered an illegal stream code that cannot be found in the VLC table 820c1bc742181ded4930842b46e9507372f0b1b963James Dong * - Encountered an illegal code in the VLC FLC table 830c1bc742181ded4930842b46e9507372f0b1b963James Dong * - The number of coefficients is greater than 64 840c1bc742181ded4930842b46e9507372f0b1b963James Dong * 850c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 860c1bc742181ded4930842b46e9507372f0b1b963James Dong 870c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P2_DecodeVLCZigzag_Inter( 880c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 ** ppBitStream, 890c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT * pBitOffset, 900c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 * pDst, 910c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader 920c1bc742181ded4930842b46e9507372f0b1b963James Dong) 930c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 940c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 last,start = 0; 950c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 *pZigzagTable = armVCM4P2_aClassicalZigzagScan; 960c1bc742181ded4930842b46e9507372f0b1b963James Dong OMXResult errorCode; 970c1bc742181ded4930842b46e9507372f0b1b963James Dong 980c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 990c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr); 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr); 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr); 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr); 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(!armIs4ByteAligned(pDst), OMX_Sts_BadArgErr); 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong errorCode = armVCM4P2_GetVLCBits ( 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong ppBitStream, 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong pBitOffset, 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong pDst, 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong shortVideoHeader, 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong start, 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong &last, 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong 11, 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong 42, 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong 2, 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong 5, 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RunIdx, 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL0, 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RunIdx, 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL1, 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0LMAX, 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1LMAX, 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RMAX, 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RMAX, 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable ); 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode); 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong 1270c1bc742181ded4930842b46e9507372f0b1b963James Dong if (last == 0) 1280c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1290c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_Err; 1300c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1310c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1320c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1330c1bc742181ded4930842b46e9507372f0b1b963James Dong 1340c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 1350c1bc742181ded4930842b46e9507372f0b1b963James Dong 136