omxVCM4P2_EncodeVLCZigzag_Inter.c revision 78e52bfac041d71ce53b5b13c2abf78af742b09d
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_EncodeVLCZigzag_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 encoding 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_EncodeVLCZigzag_Inter (6.2.4.5.3) 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs classical zigzag scanning and VLC encoding for one inter block. 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - pointer to the pointer to the current byte in the bit 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * stream 550c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - pointer to the bit position in the byte pointed by 560c1bc742181ded4930842b46e9507372f0b1b963James Dong * *ppBitStream. Valid within 0 to 7 570c1bc742181ded4930842b46e9507372f0b1b963James Dong * pQDctBlkCoef - pointer to the quantized DCT coefficient 580c1bc742181ded4930842b46e9507372f0b1b963James Dong * pattern - block pattern which is used to decide whether this block is 590c1bc742181ded4930842b46e9507372f0b1b963James Dong * encoded 600c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader - binary flag indicating presence of 610c1bc742181ded4930842b46e9507372f0b1b963James Dong * short_video_header; escape modes 0-3 are used if 620c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==0, and escape mode 4 is used when 630c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader==1. 640c1bc742181ded4930842b46e9507372f0b1b963James Dong * 650c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 660c1bc742181ded4930842b46e9507372f0b1b963James Dong * 670c1bc742181ded4930842b46e9507372f0b1b963James Dong * ppBitStream - *ppBitStream is updated after the block is encoded so that 680c1bc742181ded4930842b46e9507372f0b1b963James Dong * it points to the current byte in the bit stream buffer. 690c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset - *pBitOffset is updated so that it points to the current bit 700c1bc742181ded4930842b46e9507372f0b1b963James Dong * position in the byte pointed by *ppBitStream. 710c1bc742181ded4930842b46e9507372f0b1b963James Dong * 720c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 730c1bc742181ded4930842b46e9507372f0b1b963James Dong * 740c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr - no error 750c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - Bad arguments 760c1bc742181ded4930842b46e9507372f0b1b963James Dong * - At least one of the pointers: is NULL: ppBitStream, *ppBitStream, 770c1bc742181ded4930842b46e9507372f0b1b963James Dong * pBitOffset, pQDctBlkCoef 780c1bc742181ded4930842b46e9507372f0b1b963James Dong * - *pBitOffset < 0, or *pBitOffset >7. 790c1bc742181ded4930842b46e9507372f0b1b963James Dong * 800c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 810c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P2_EncodeVLCZigzag_Inter( 820c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 **ppBitStream, 830c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT * pBitOffset, 840c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_S16 *pQDctBlkCoef, 850c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 pattern, 860c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader 870c1bc742181ded4930842b46e9507372f0b1b963James Dong) 880c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 890c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_U8 start = 0; 900c1bc742181ded4930842b46e9507372f0b1b963James Dong const OMX_U8 *pZigzagTable = armVCM4P2_aClassicalZigzagScan; 910c1bc742181ded4930842b46e9507372f0b1b963James Dong 920c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 930c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(ppBitStream == NULL, OMX_Sts_BadArgErr); 940c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(*ppBitStream == NULL, OMX_Sts_BadArgErr); 950c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pBitOffset == NULL, OMX_Sts_BadArgErr); 960c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pQDctBlkCoef == NULL, OMX_Sts_BadArgErr); 970c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf((*pBitOffset < 0) || (*pBitOffset >7), OMX_Sts_BadArgErr); 980c1bc742181ded4930842b46e9507372f0b1b963James Dong 990c1bc742181ded4930842b46e9507372f0b1b963James Dong if (pattern) 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_PutVLCBits ( 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong ppBitStream, 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong pBitOffset, 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong pQDctBlkCoef, 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong shortVideoHeader, 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong start, 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong 26, 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong 40, 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong 10, 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong 1, 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RunIdx, 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL0, 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RunIdx, 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterVlcL1, 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0LMAX, 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1LMAX, 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL0RMAX, 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong armVCM4P2_InterL1RMAX, 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong pZigzagTable 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong ); 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong } /* Pattern check ends*/ 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong 1270c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 128