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_DecodeBlockCoef_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 inter reconstruction 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * 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 "armCOMM.h" 380c1bc742181ded4930842b46e9507372f0b1b963James Dong 390c1bc742181ded4930842b46e9507372f0b1b963James Dong 400c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P2_DecodeBlockCoef_Inter (6.2.5.4.2) 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * Decodes the INTER block coefficients. This function performs inverse 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * quantization, inverse zigzag positioning, and IDCT (with appropriate 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * clipping on each step) on the coefficients. The results (residuals) are 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * placed in a contiguous array of 64 elements. For INTER block, the output 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * buffer holds the residuals for further reconstruction. 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - pointer to the pointer to the current byte in the bit 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * stream buffer. There is no boundary check for the bit stream 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * buffer. 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - pointer to the bit position in the byte pointed to by 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * *ppBitStream. *pBitOffset is valid within [0-7] 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * QP - quantization parameter 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader - binary flag indicating presence of 590c1bc742181ded4930842b46e9507372f0b1b963James Dong * short_video_header; shortVideoHeader==1 selects linear intra DC 600c1bc742181ded4930842b46e9507372f0b1b963James Dong * mode, and shortVideoHeader==0 selects non linear intra DC mode. 610c1bc742181ded4930842b46e9507372f0b1b963James Dong * 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - *ppBitStream is updated after the block is decoded, so 650c1bc742181ded4930842b46e9507372f0b1b963James Dong * that it points to the current byte in the bit stream buffer 660c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - *pBitOffset is updated so that it points to the current bit 670c1bc742181ded4930842b46e9507372f0b1b963James Dong * position in the byte pointed by *ppBitStream 680c1bc742181ded4930842b46e9507372f0b1b963James Dong * pDst - pointer to the decoded residual buffer (a contiguous array of 64 690c1bc742181ded4930842b46e9507372f0b1b963James Dong * elements of OMX_S16 data type); must be aligned on a 16-byte 700c1bc742181ded4930842b46e9507372f0b1b963James Dong * boundary. 710c1bc742181ded4930842b46e9507372f0b1b963James Dong * 720c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 730c1bc742181ded4930842b46e9507372f0b1b963James Dong * 740c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr - no error 750c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - bad arguments, if: 760c1bc742181ded4930842b46e9507372f0b1b963James Dong * - At least one of the following pointers is Null: 770c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream, *ppBitStream, pBitOffset , pDst 780c1bc742181ded4930842b46e9507372f0b1b963James Dong * - *pBitOffset exceeds [0,7] 790c1bc742181ded4930842b46e9507372f0b1b963James Dong * - QP <= 0. 800c1bc742181ded4930842b46e9507372f0b1b963James Dong * - pDst is not 16-byte aligned 810c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_Err - status error. Refer to OMX_Sts_Err of DecodeVLCZigzag_Inter . 820c1bc742181ded4930842b46e9507372f0b1b963James Dong * 830c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 840c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P2_DecodeBlockCoef_Inter( 850c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 ** ppBitStream, 860c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT * pBitOffset, 870c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 * pDst, 880c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT QP, 890c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader 900c1bc742181ded4930842b46e9507372f0b1b963James Dong) 910c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 920c1bc742181ded4930842b46e9507372f0b1b963James Dong /* 64 elements are needed but to align it to 16 bytes need 930c1bc742181ded4930842b46e9507372f0b1b963James Dong 15 more elements of padding */ 940c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 tempBuf[79]; 950c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 *pTempBuf1; 960c1bc742181ded4930842b46e9507372f0b1b963James Dong OMXResult errorCode; 970c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Aligning the local buffers */ 980c1bc742181ded4930842b46e9507372f0b1b963James Dong pTempBuf1 = armAlignTo16Bytes(tempBuf); 990c1bc742181ded4930842b46e9507372f0b1b963James Dong 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr); 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr); 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr); 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pDst == NULL, OMX_Sts_BadArgErr); 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(!armIs16ByteAligned(pDst), OMX_Sts_BadArgErr); 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr); 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(((*pBitOffset < 0) || (*pBitOffset > 7)), OMX_Sts_BadArgErr); 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong /* VLD and zigzag */ 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong errorCode = omxVCM4P2_DecodeVLCZigzag_Inter(ppBitStream, pBitOffset, 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong pTempBuf1,shortVideoHeader); 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode); 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Dequantization */ 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong errorCode = omxVCM4P2_QuantInvInter_I( 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong pTempBuf1, 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong QP); 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode); 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Inverse transform */ 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong errorCode = omxVCM4P2_IDCT8x8blk(pTempBuf1, pDst); 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetDataErrIf((errorCode != OMX_Sts_NoErr), errorCode); 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1270c1bc742181ded4930842b46e9507372f0b1b963James Dong 1280c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 1290c1bc742181ded4930842b46e9507372f0b1b963James Dong 1300c1bc742181ded4930842b46e9507372f0b1b963James Dong 131