10c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 20c1bc742181ded4930842b46e9507372f0b1b963James Dong * 30c1bc742181ded4930842b46e9507372f0b1b963James Dong * File Name: omxVCM4P2_QuantInvIntra_I.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 intra inverse Quantization 140c1bc742181ded4930842b46e9507372f0b1b963James Dong * 150c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 160c1bc742181ded4930842b46e9507372f0b1b963James Dong 170c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxtypes.h" 180c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armOMX.h" 190c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "omxVC.h" 200c1bc742181ded4930842b46e9507372f0b1b963James Dong 210c1bc742181ded4930842b46e9507372f0b1b963James Dong#include "armCOMM.h" 220c1bc742181ded4930842b46e9507372f0b1b963James Dong 230c1bc742181ded4930842b46e9507372f0b1b963James Dong/** 240c1bc742181ded4930842b46e9507372f0b1b963James Dong * Function: omxVCM4P2_QuantInvIntra_I (6.2.5.3.2) 250c1bc742181ded4930842b46e9507372f0b1b963James Dong * 260c1bc742181ded4930842b46e9507372f0b1b963James Dong * Description: 270c1bc742181ded4930842b46e9507372f0b1b963James Dong * Performs the second inverse quantization mode on an intra/inter coded 280c1bc742181ded4930842b46e9507372f0b1b963James Dong * block. Supports bits_per_pixel = 8. The output coefficients are clipped to 290c1bc742181ded4930842b46e9507372f0b1b963James Dong * the range [-2048, 2047]. 300c1bc742181ded4930842b46e9507372f0b1b963James Dong * 310c1bc742181ded4930842b46e9507372f0b1b963James Dong * Input Arguments: 320c1bc742181ded4930842b46e9507372f0b1b963James Dong * 330c1bc742181ded4930842b46e9507372f0b1b963James Dong * pSrcDst - pointer to the input (quantized) intra/inter block; must be 340c1bc742181ded4930842b46e9507372f0b1b963James Dong * aligned on a 16-byte boundary. 350c1bc742181ded4930842b46e9507372f0b1b963James Dong * QP - quantization parameter (quantizer_scale) 360c1bc742181ded4930842b46e9507372f0b1b963James Dong * videoComp - video component type of the current block. Takes one of the 370c1bc742181ded4930842b46e9507372f0b1b963James Dong * following flags: OMX_VC_LUMINANCE, OMX_VC_CHROMINANCE (intra 380c1bc742181ded4930842b46e9507372f0b1b963James Dong * version only). 390c1bc742181ded4930842b46e9507372f0b1b963James Dong * shortVideoHeader - binary flag indicating presence of short_video_header 400c1bc742181ded4930842b46e9507372f0b1b963James Dong * (intra version only). 410c1bc742181ded4930842b46e9507372f0b1b963James Dong * 420c1bc742181ded4930842b46e9507372f0b1b963James Dong * Output Arguments: 430c1bc742181ded4930842b46e9507372f0b1b963James Dong * 440c1bc742181ded4930842b46e9507372f0b1b963James Dong * pSrcDst - pointer to the output (dequantized) intra/inter block 450c1bc742181ded4930842b46e9507372f0b1b963James Dong * 460c1bc742181ded4930842b46e9507372f0b1b963James Dong * Return Value: 470c1bc742181ded4930842b46e9507372f0b1b963James Dong * 480c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_NoErr - no error 490c1bc742181ded4930842b46e9507372f0b1b963James Dong * OMX_Sts_BadArgErr - bad arguments; one or more of the following is 500c1bc742181ded4930842b46e9507372f0b1b963James Dong * true: 510c1bc742181ded4930842b46e9507372f0b1b963James Dong * - pSrcDst is NULL 520c1bc742181ded4930842b46e9507372f0b1b963James Dong * - QP <= 0 or QP >=31 530c1bc742181ded4930842b46e9507372f0b1b963James Dong * - videoComp is neither OMX_VC_LUMINANCE nor OMX_VC_CHROMINANCE. 540c1bc742181ded4930842b46e9507372f0b1b963James Dong * 550c1bc742181ded4930842b46e9507372f0b1b963James Dong */ 560c1bc742181ded4930842b46e9507372f0b1b963James Dong 570c1bc742181ded4930842b46e9507372f0b1b963James DongOMXResult omxVCM4P2_QuantInvIntra_I( 580c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_S16 * pSrcDst, 590c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT QP, 600c1bc742181ded4930842b46e9507372f0b1b963James Dong OMXVCM4P2VideoComponent videoComp, 610c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT shortVideoHeader 620c1bc742181ded4930842b46e9507372f0b1b963James Dong) 630c1bc742181ded4930842b46e9507372f0b1b963James Dong{ 640c1bc742181ded4930842b46e9507372f0b1b963James Dong 650c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Initialized to remove compilation error */ 660c1bc742181ded4930842b46e9507372f0b1b963James Dong OMX_INT dcScaler = 0, coeffCount, Sign; 670c1bc742181ded4930842b46e9507372f0b1b963James Dong 680c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Argument error checks */ 690c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(pSrcDst == NULL, OMX_Sts_BadArgErr); 700c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(((QP <= 0) || (QP >= 32)), OMX_Sts_BadArgErr); 710c1bc742181ded4930842b46e9507372f0b1b963James Dong armRetArgErrIf(((videoComp != OMX_VC_LUMINANCE) && (videoComp != OMX_VC_CHROMINANCE)), OMX_Sts_BadArgErr); 720c1bc742181ded4930842b46e9507372f0b1b963James Dong 730c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Calculate the DC scaler value */ 740c1bc742181ded4930842b46e9507372f0b1b963James Dong 750c1bc742181ded4930842b46e9507372f0b1b963James Dong /* linear intra DC mode */ 760c1bc742181ded4930842b46e9507372f0b1b963James Dong if(shortVideoHeader) 770c1bc742181ded4930842b46e9507372f0b1b963James Dong { 780c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = 8; 790c1bc742181ded4930842b46e9507372f0b1b963James Dong } 800c1bc742181ded4930842b46e9507372f0b1b963James Dong /* nonlinear intra DC mode */ 810c1bc742181ded4930842b46e9507372f0b1b963James Dong else 820c1bc742181ded4930842b46e9507372f0b1b963James Dong { 830c1bc742181ded4930842b46e9507372f0b1b963James Dong 840c1bc742181ded4930842b46e9507372f0b1b963James Dong if (videoComp == OMX_VC_LUMINANCE) 850c1bc742181ded4930842b46e9507372f0b1b963James Dong { 860c1bc742181ded4930842b46e9507372f0b1b963James Dong if (QP >= 1 && QP <= 4) 870c1bc742181ded4930842b46e9507372f0b1b963James Dong { 880c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = 8; 890c1bc742181ded4930842b46e9507372f0b1b963James Dong } 900c1bc742181ded4930842b46e9507372f0b1b963James Dong else if (QP >= 5 && QP <= 8) 910c1bc742181ded4930842b46e9507372f0b1b963James Dong { 920c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = 2 * QP; 930c1bc742181ded4930842b46e9507372f0b1b963James Dong } 940c1bc742181ded4930842b46e9507372f0b1b963James Dong else if (QP >= 9 && QP <= 24) 950c1bc742181ded4930842b46e9507372f0b1b963James Dong { 960c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = QP + 8; 970c1bc742181ded4930842b46e9507372f0b1b963James Dong } 980c1bc742181ded4930842b46e9507372f0b1b963James Dong else 990c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1000c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = (2 * QP) - 16; 1010c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1020c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1030c1bc742181ded4930842b46e9507372f0b1b963James Dong 1040c1bc742181ded4930842b46e9507372f0b1b963James Dong else if (videoComp == OMX_VC_CHROMINANCE) 1050c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1060c1bc742181ded4930842b46e9507372f0b1b963James Dong if (QP >= 1 && QP <= 4) 1070c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1080c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = 8; 1090c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1100c1bc742181ded4930842b46e9507372f0b1b963James Dong else if (QP >= 5 && QP <= 24) 1110c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1120c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = (QP + 13)/2; 1130c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1140c1bc742181ded4930842b46e9507372f0b1b963James Dong else 1150c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1160c1bc742181ded4930842b46e9507372f0b1b963James Dong dcScaler = QP - 6; 1170c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1180c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1190c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1200c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Dequant the DC value, this applies to both the methods */ 1210c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[0] = pSrcDst[0] * dcScaler; 1220c1bc742181ded4930842b46e9507372f0b1b963James Dong 1230c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Saturate */ 1240c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[0] = armClip (-2048, 2047, pSrcDst[0]); 1250c1bc742181ded4930842b46e9507372f0b1b963James Dong 1260c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Second Inverse quantisation method */ 1270c1bc742181ded4930842b46e9507372f0b1b963James Dong for (coeffCount = 1; coeffCount < 64; coeffCount++) 1280c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1290c1bc742181ded4930842b46e9507372f0b1b963James Dong /* check sign */ 1300c1bc742181ded4930842b46e9507372f0b1b963James Dong Sign = armSignCheck (pSrcDst[coeffCount]); 1310c1bc742181ded4930842b46e9507372f0b1b963James Dong 1320c1bc742181ded4930842b46e9507372f0b1b963James Dong if (QP & 0x1) 1330c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1340c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[coeffCount] = (2* armAbs(pSrcDst[coeffCount]) + 1) * QP; 1350c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[coeffCount] *= Sign; 1360c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1370c1bc742181ded4930842b46e9507372f0b1b963James Dong else 1380c1bc742181ded4930842b46e9507372f0b1b963James Dong { 1390c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[coeffCount] = 1400c1bc742181ded4930842b46e9507372f0b1b963James Dong (2* armAbs(pSrcDst[coeffCount]) + 1) * QP - 1; 1410c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[coeffCount] *= Sign; 1420c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1430c1bc742181ded4930842b46e9507372f0b1b963James Dong 1440c1bc742181ded4930842b46e9507372f0b1b963James Dong /* Saturate */ 1450c1bc742181ded4930842b46e9507372f0b1b963James Dong pSrcDst[coeffCount] = armClip (-2048, 2047, pSrcDst[coeffCount]); 1460c1bc742181ded4930842b46e9507372f0b1b963James Dong } 1470c1bc742181ded4930842b46e9507372f0b1b963James Dong return OMX_Sts_NoErr; 1480c1bc742181ded4930842b46e9507372f0b1b963James Dong 1490c1bc742181ded4930842b46e9507372f0b1b963James Dong} 1500c1bc742181ded4930842b46e9507372f0b1b963James Dong 1510c1bc742181ded4930842b46e9507372f0b1b963James Dong/* End of file */ 1520c1bc742181ded4930842b46e9507372f0b1b963James Dong 1530c1bc742181ded4930842b46e9507372f0b1b963James Dong 154