spt.cpp

网络MPEG4IP流媒体开发源代码

/*************************************************************************

This software module was originally developed by 

	Chuang Gu ([e-mail]), Microsoft Corporation
	(date: Auguest, 1997)

and also edited by

    Yoshinori Suzuki (Hitachi, Ltd.)
    Yuichiro Nakaya (Hitachi, Ltd.)

in the course of development of the MPEG-4 Video (ISO/IEC 14496-2). 
This software module is an implementation of a part of one or more MPEG-4 Video tools 
as specified by the MPEG-4 Video. 
ISO/IEC gives users of the MPEG-4 Video free license to this software module or modifications 
thereof for use in hardware or software products claiming conformance to the MPEG-4 Video. 
Those intending to use this software module in hardware or software products are advised that its use may infringe existing patents. 
The original developer of this software module and his/her company, 
the subsequent editors and their companies, 
and ISO/IEC have no liability for use of this software module or modifications thereof in an implementation. 
Copyright is not released for non MPEG-4 Video conforming products. 
Microsoft retains full right to use the code for his/her own purpose, 
assign or donate the code to a third party and to inhibit third parties from using the code for non <MPEG standard> conforming products. 
This copyright notice must be included in all copies or derivative works. 

Copyright (c) 1996, 1997.


Module Name:

	spt.cpp

Abstract:

	Functions for sprite warping 

Revision History:
	Nov. 14, 1997: Fast Affine Warping functions added by Hitachi, Ltd.
	Jan. 13, 1999: Code for disallowing zero demoninators in perspective
                       warping added by Hitachi, Ltd.

*************************************************************************/

#include <stdio.h>
#include <math.h>
#include "typeapi.h"
#include "mode.hpp"
#include "vopses.hpp"
#include "codehead.h"

#ifdef __MFC_
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

#define new DEBUG_NEW				   
#endif // __MFC_

#define _FOR_GSSP_

Void CVideoObject::warpYA (const CPerspective2D& persp, const CRct& rctWarpedBound, UInt accuracy) 
// warp m_pvopcSptQ's Y and A components to m_pvopcCurrQs
{
	assert (m_pvopcCurrQ -> whereY ().includes (rctWarpedBound));
	const CU8Image* puciCurrY = m_pvopcCurrQ -> getPlane (Y_PLANE);
#ifdef _FOR_GSSP_
	const CU8Image* puciCurrBY = m_pvopcCurrQ -> getPlane (BY_PLANE);
#endif
	const CU8Image* puciCurrA = (m_pvopcSptQ -> fAUsage () == EIGHT_BIT)? m_pvopcCurrQ -> getPlane (A_PLANE) : m_pvopcCurrQ -> getPlane (BY_PLANE);
	const CU8Image* puciSptY = m_pvopcSptQ -> getPlane (Y_PLANE);
#ifdef _FOR_GSSP_
	const CU8Image* puciSptBY = m_pvopcSptQ -> getPlane (BY_PLANE);
#endif
	const CU8Image* puciSptA = (m_pvopcSptQ -> fAUsage () == EIGHT_BIT)? m_pvopcSptQ -> getPlane (A_PLANE) : m_pvopcSptQ -> getPlane (BY_PLANE);
	const CRct rctSptY = m_pvopcSptQ -> whereY ();
	const UInt offsetSlice = m_pvopcCurrQ -> whereY ().width * MB_SIZE;
	UInt accuracy1 = accuracy + 1;
	PixelC* ppxlcCurrQYSlice = (PixelC*) puciCurrY -> pixels ();
#ifdef _FOR_GSSP_
	PixelC* ppxlcCurrQBYSlice = (PixelC*) puciCurrBY -> pixels ();
#endif
	PixelC* ppxlcCurrQASlice = (PixelC*) puciCurrA -> pixels ();
	memset (ppxlcCurrQYSlice, 0, puciCurrY -> where ().area () * sizeof(PixelC));
#ifdef _FOR_GSSP_
	memset (ppxlcCurrQBYSlice, 0, puciCurrBY -> where ().area () * sizeof(PixelC));
#endif
	memset (ppxlcCurrQASlice, 0, puciCurrA -> where ().area () * sizeof(PixelC));
	ppxlcCurrQYSlice = (PixelC*) puciCurrY -> pixels (rctWarpedBound.left, rctWarpedBound.top);
#ifdef _FOR_GSSP_
	ppxlcCurrQBYSlice = (PixelC*) puciCurrBY -> pixels (rctWarpedBound.left, rctWarpedBound.top);
#endif
	ppxlcCurrQASlice = (PixelC*) puciCurrA -> pixels (rctWarpedBound.left, rctWarpedBound.top);
	for (Int topMB = rctWarpedBound.top; topMB < rctWarpedBound.bottom; topMB += MB_SIZE) {
		PixelC * ppxlcCurrQYBlock = ppxlcCurrQYSlice;
		PixelC * ppxlcCurrQABlock = ppxlcCurrQASlice;
		PixelC * ppxlcCurrQBYBlock = ppxlcCurrQBYSlice;
		for (Int leftMB = rctWarpedBound.left; leftMB < rctWarpedBound.right; leftMB += MB_SIZE) {
			UInt offsetLine = m_pvopcCurrQ -> whereY ().width - min(MB_SIZE, rctWarpedBound.right - leftMB);
			Bool existOpaguePixelMB = (m_pvopcSptQ -> fAUsage () == RECTANGLE);
			Bool existZeroDenomMB = FALSE; 
			PixelC * ppxlcCurrQY = ppxlcCurrQYBlock;
			PixelC * ppxlcCurrQBY = ppxlcCurrQBYBlock;
			PixelC * ppxlcCurrQA = ppxlcCurrQABlock;
			for (CoordI y = topMB; y < min(topMB + MB_SIZE, rctWarpedBound.bottom); y++) {
				for (CoordI x = leftMB; x < min(leftMB + MB_SIZE, rctWarpedBound.right); x++) {
					CSiteWFlag src = persp * (CSite (x, y)); 
					if (src.f) {
						existZeroDenomMB = TRUE;
						continue;
					}
					CoordD dx = (CoordD)src.s.x / (1 << accuracy1);
					CoordD dy = (CoordD)src.s.y / (1 << accuracy1);
					CoordI fx = (CoordI) floor (dx);
					CoordI fy = (CoordI) floor (dy); 
					CoordI cx = (CoordI) ceil (dx);
					CoordI cy = (CoordI) ceil (dy);
					if (rctSptY.includes (fx, fy) && rctSptY.includes (fx, cy) && rctSptY.includes (cx, fy) && rctSptY.includes (cx, cy)) {
#ifdef _FOR_GSSP_
						PixelC pxlcWarpedBY = puciSptBY -> pixel (src.s, accuracy);
						if (pxlcWarpedBY >= 128) {
							*ppxlcCurrQBY = MPEG4_OPAQUE;
#else
						PixelC pxlcWarpedA = puciSptA -> pixel (src.s, accuracy);
						if (pxlcWarpedA >= 128) {
							*ppxlcCurrQA = MPEG4_OPAQUE;
#endif
							existOpaguePixelMB = TRUE;
							*ppxlcCurrQY = puciSptY -> pixel (src.s, accuracy);
#ifdef _FOR_GSSP_
							if(m_pvopcSptQ -> fAUsage () == EIGHT_BIT)
								*ppxlcCurrQA = puciSptA -> pixel (src.s, accuracy);
#endif
						}
					}
					ppxlcCurrQY++;	
#ifdef _FOR_GSSP_
					ppxlcCurrQBY++;
#endif
					ppxlcCurrQA++;
				}
				ppxlcCurrQY += offsetLine;
#ifdef _FOR_GSSP_
				ppxlcCurrQBY += offsetLine;
#endif
				ppxlcCurrQA += offsetLine;
			}
			assert (!(existOpaguePixelMB && existZeroDenomMB));

			ppxlcCurrQYBlock += MB_SIZE;
#ifdef _FOR_GSSP_
			ppxlcCurrQBYBlock += MB_SIZE;
#endif
			ppxlcCurrQABlock += MB_SIZE;
		}
		ppxlcCurrQYSlice += offsetSlice;
#ifdef _FOR_GSSP_
		ppxlcCurrQBYSlice += offsetSlice;
#endif
		ppxlcCurrQASlice += offsetSlice;
	}
} 

Void CVideoObject::warpUV (const CPerspective2D& persp, const CRct& rctWarpedBound, UInt accuracy) 
// warp m_pvopcSptQ's U and V components to m_pvopcCurrQs
{
	assert (m_pvopcCurrQ -> whereUV ().includes (rctWarpedBound));
	const CU8Image* puciCurrU = m_pvopcCurrQ -> getPlane (U_PLANE);
	const CU8Image* puciCurrV = m_pvopcCurrQ -> getPlane (V_PLANE);
	const CU8Image* puciCurrBY = m_pvopcCurrQ -> getPlane (BY_PLANE);
	const CU8Image* puciSptU = m_pvopcSptQ -> getPlane (U_PLANE);
	const CU8Image* puciSptV = m_pvopcSptQ -> getPlane (V_PLANE);
	const CRct rctSptUV = m_pvopcSptQ -> whereUV ();
	const UInt offsetSliceUV = m_pvopcCurrQ -> whereUV ().width * BLOCK_SIZE;
	const UInt offsetSliceBY = m_pvopcCurrQ -> whereY ().width * MB_SIZE;
	const UInt nextRowBY = m_pvopcCurrQ -> whereY ().width;
	UInt accuracy1 = accuracy + 1;
	PixelC* ppxlcCurrQUSlice = (PixelC*) puciCurrU -> pixels ();
	PixelC* ppxlcCurrQVSlice = (PixelC*) puciCurrV -> pixels ();
	PixelC pxlcVal = 128;
	// not sure if this is needed swinder
	if(m_volmd.nBits>8)
		pxlcVal = 1<<(m_volmd.nBits - 1);
	pxlcmemset (ppxlcCurrQUSlice, pxlcVal, puciCurrU -> where ().area ());
	pxlcmemset (ppxlcCurrQVSlice, pxlcVal, puciCurrV -> where ().area ());
	ppxlcCurrQUSlice = (PixelC*) puciCurrU -> pixels (rctWarpedBound.left, rctWarpedBound.top);
	ppxlcCurrQVSlice = (PixelC*) puciCurrV -> pixels (rctWarpedBound.left, rctWarpedBound.top);
	PixelC* ppxlcCurrQBYSlice = (PixelC*) puciCurrBY -> pixels (2 * rctWarpedBound.left, 2 * rctWarpedBound.top);
	
	for (Int topMB = rctWarpedBound.top; topMB < rctWarpedBound.bottom; topMB += BLOCK_SIZE) {
		PixelC * ppxlcCurrQUBlock = ppxlcCurrQUSlice;
		PixelC * ppxlcCurrQVBlock = ppxlcCurrQVSlice;
		PixelC * ppxlcCurrQBYBlock = ppxlcCurrQBYSlice;

		for (Int leftMB = rctWarpedBound.left; leftMB < rctWarpedBound.right; leftMB += BLOCK_SIZE) {
			PixelC *ppxlcCurrQU = ppxlcCurrQUBlock;
			PixelC *ppxlcCurrQV = ppxlcCurrQVBlock;
			PixelC *ppxlcCurrQBY = ppxlcCurrQBYBlock;
			PixelC *ppxlcCurrQBYNextRow = ppxlcCurrQBYBlock + nextRowBY;
			UInt offsetLineUV = m_pvopcCurrQ -> whereUV ().width - min(BLOCK_SIZE, rctWarpedBound.right - leftMB);
			UInt offsetLineBY = 2 * (m_pvopcCurrQ -> whereY ().width - min(BLOCK_SIZE, rctWarpedBound.right - leftMB));
			Bool existOpaguePixelMBUV = (m_pvopcSptQ -> fAUsage () == RECTANGLE);
			Bool existZeroDenomMBUV = FALSE; 
			for (CoordI y = topMB; y < min(topMB + BLOCK_SIZE, rctWarpedBound.bottom); y++) {
				for (CoordI x = leftMB; x < min(leftMB + BLOCK_SIZE, rctWarpedBound.right); x++) {
					CSiteWFlag src = persp * (CSite (x, y)); 
					if (src.f) {
						existZeroDenomMBUV = TRUE;
						continue;
					}
					CoordD dx = (CoordD)src.s.x / (1 << accuracy1);
					CoordD dy = (CoordD)src.s.y / (1 << accuracy1);
					CoordI fx = (CoordI) floor (dx);
					CoordI fy = (CoordI) floor (dy); 
					CoordI cx = (CoordI) ceil (dx);
					CoordI cy = (CoordI) ceil (dy);
					if (rctSptUV.includes (fx, fy) && rctSptUV.includes (fx, cy) && rctSptUV.includes (cx, fy) && rctSptUV.includes (cx, cy)) {
						if (*ppxlcCurrQBY | *(ppxlcCurrQBY + 1) | *ppxlcCurrQBYNextRow | *(ppxlcCurrQBYNextRow+1)) {
							existOpaguePixelMBUV = TRUE;
							*ppxlcCurrQU = puciSptU -> pixel (src.s, accuracy);
							*ppxlcCurrQV = puciSptV -> pixel (src.s, accuracy);
						}
					}
					ppxlcCurrQBY += 2;
					ppxlcCurrQBYNextRow += 2;
					ppxlcCurrQU++;	
					ppxlcCurrQV++;
				}
				ppxlcCurrQBY += offsetLineBY;
				ppxlcCurrQBYNextRow += offsetLineBY;
				ppxlcCurrQU += offsetLineUV;
				ppxlcCurrQV += offsetLineUV;
			}
			assert (!(existOpaguePixelMBUV && existZeroDenomMBUV));

			ppxlcCurrQBYBlock += MB_SIZE;
			ppxlcCurrQUBlock += BLOCK_SIZE;
			ppxlcCurrQVBlock += BLOCK_SIZE;
		}
		ppxlcCurrQBYSlice += offsetSliceBY;
		ppxlcCurrQUSlice += offsetSliceUV;
		ppxlcCurrQVSlice += offsetSliceUV;
	}
}		 

Void CVideoObject::FastAffineWarp (const CRct& rctWarpedBound, 
                   const CRct& rctWarpedBoundUV, UInt accuracy, UInt pntNum) 
{
	assert (m_pvopcCurrQ -> whereY ().includes (rctWarpedBound));
	const CU8Image* puciCurrY = m_pvopcCurrQ -> getPlane (Y_PLANE);
#ifdef _FOR_GSSP_
	const CU8Image* puciCurrBY = m_pvopcCurrQ -> getPlane (BY_PLANE);
#endif
	const CU8Image* puciCurrA = (m_pvopcSptQ -> fAUsage () == EIGHT_BIT)? m_pvopcCurrQ -> getPlane (A_PLANE) : m_pvopcCurrQ -> getPlane (BY_PLANE);
	const CU8Image* puciSptY = m_pvopcSptQ -> getPlane (Y_PLANE);
#ifdef _FOR_GSSP_
	const CU8Image* puciSptBY = m_pvopcSptQ -> getPlane (BY_PLANE);
#endif
	const CU8Image* puciSptA = (m_pvopcSptQ -> fAUsage () == EIGHT_BIT)? m_pvopcSptQ -> getPlane (A_PLANE) : m_pvopcSptQ -> getPlane (BY_PLANE);
	const UInt offset = m_pvopcCurrQ -> whereY ().width - rctWarpedBound.width;
	PixelC* ppxlcCurrQY = (PixelC*) puciCurrY -> pixels ();
#ifdef _FOR_GSSP_
	PixelC* ppxlcCurrQBY = (PixelC*) puciCurrBY -> pixels ();
#endif
	PixelC* ppxlcCurrQA = (PixelC*) puciCurrA -> pixels ();
	memset (ppxlcCurrQY, 0, puciCurrY -> where ().area () * sizeof(PixelC));
#ifdef _FOR_GSSP_
	memset (ppxlcCurrQBY, 0, puciCurrBY -> where ().area () * sizeof(PixelC));
#endif
	memset (ppxlcCurrQA, 0, puciCurrA -> where ().area () * sizeof(PixelC));
	ppxlcCurrQY = (PixelC*) puciCurrY -> pixels (rctWarpedBound.left, rctWarpedBound.top);
#ifdef _FOR_GSSP_
	ppxlcCurrQBY = (PixelC*) puciCurrBY -> pixels (rctWarpedBound.left, rctWarpedBound.top);
#endif
	ppxlcCurrQA = (PixelC*) puciCurrA -> pixels (rctWarpedBound.left, rctWarpedBound.top);
	PixelC* ppxlcSptQY = (PixelC*) puciSptY -> pixels ();
#ifdef _FOR_GSSP_
	PixelC* ppxlcSptQBY = (PixelC*) puciSptBY -> pixels ();
#endif
	PixelC* ppxlcSptQA = (PixelC*) puciSptA -> pixels ();
    Int sprite_left_edge = m_pvopcSptQ -> whereY ().left;
    Int sprite_top_edge = m_pvopcSptQ -> whereY ().top;
	ppxlcSptQY = (PixelC*) puciSptY -> pixels (sprite_left_edge, sprite_top_edge);
#ifdef _FOR_GSSP_
	ppxlcSptQBY = (PixelC*) puciSptBY -> pixels (sprite_left_edge, sprite_top_edge);
#endif
	ppxlcSptQA = (PixelC*) puciSptA -> pixels (sprite_left_edge, sprite_top_edge);

	assert (m_pvopcCurrQ -> whereUV ().includes (rctWarpedBoundUV));
	const CU8Image* puciCurrU = m_pvopcCurrQ -> getPlane (U_PLANE);
	const CU8Image* puciCurrV = m_pvopcCurrQ -> getPlane (V_PLANE);
#ifndef _FOR_GSSP_
	const CU8Image* puciCurrBY = m_pvopcCurrQ -> getPlane (BY_PLANE);
#endif
	const CU8Image* puciSptU = m_pvopcSptQ -> getPlane (U_PLANE);
	const CU8Image* puciSptV = m_pvopcSptQ -> getPlane (V_PLANE);
	const UInt offsetUV = m_pvopcCurrQ -> whereUV ().width - rctWarpedBoundUV.width;
	const UInt offsetBY = 2 * (m_pvopcCurrQ -> whereY ().width -  rctWarpedBoundUV.width);
	PixelC* ppxlcCurrQU = (PixelC*) puciCurrU -> pixels ();
	PixelC* ppxlcCurrQV = (PixelC*) puciCurrV -> pixels ();
	PixelC pxlcVal = 128;
	// not sure if this is needed swinder
	if(m_volmd.nBits>8)
		pxlcVal = 1<<(m_volmd.nBits - 1);
	memset (ppxlcCurrQU, pxlcVal, puciCurrU -> where ().area () * sizeof(PixelC));
	memset (ppxlcCurrQV, pxlcVal, puciCurrV -> where ().area () * sizeof(PixelC));
	ppxlcCurrQU = (PixelC*) puciCurrU -> pixels (rctWarpedBoundUV.left, rctWarpedBoundUV.top);
	ppxlcCurrQV = (PixelC*) puciCurrV -> pixels (rctWarpedBoundUV.left, rctWarpedBoundUV.top);
	PixelC* ppxlcSptQU = (PixelC*) puciSptU -> pixels ();
	PixelC* ppxlcSptQV = (PixelC*) puciSptV -> pixels ();
	ppxlcSptQU = (PixelC*) puciSptU -> pixels (sprite_left_edge/2, sprite_top_edge/2);
	ppxlcSptQV = (PixelC*) puciSptV -> pixels (sprite_left_edge/2, sprite_top_edge/2);

	UInt accuracy1 = accuracy + 1;
    UInt uiScale = 1 << accuracy1;
    Int a = 0, b = 0, c, d = 0, e = 0, f;
    Int cyy = 0, cxy = 0, dnm_pwr = 0;	//wchen: get rid of unreferenced local variable cxx and cyx

    Int width = rctWarpedBound.right - rctWarpedBound.left;
    Int height = rctWarpedBound.bottom - rctWarpedBound.top;
    Int W, H, VW, VH = 0, VWH = 0, vh_pwr, vw_pwr, vwh_pwr = 0;

    Int r_pwr = 3 - accuracy;
    Int r = 1 << r_pwr;

    Int x0p =  (Int)(m_rgstDstQ [0].x * uiScale * r);
    Int y0p =  (Int)(m_rgstDstQ [0].y * uiScale * r);
    Int x1p =  (Int)(m_rgstDstQ [1].x * uiScale * r);
    Int y1p =  (Int)(m_rgstDstQ [1].y * uiScale * r);

    W = width;
    VW = 1;
    vw_pwr = 0;
    while (VW < W) {
        VW <<= 1;
        vw_pwr++;
    }
    Int ex2p = 0, ey2p = 0;
    Int x0 = 0;
    Int y0 = 0;
    Int x1 = W;
    Int y1 = 0;
    Int ex1p = LinearExtrapolation(x0, x1, x0p, x1p, W, VW) + ((x0+VW)<<4);
    Int ey1p = LinearExtrapolation(y0, y1, y0p, y1p, W, VW) + (y0<<4);

    if (pntNum==3) {
         Int x2p =  (Int)(m_rgstDstQ [2].x * uiScale * r);
         Int y2p =  (Int)(m_rgstDstQ [2].y * uiScale * r);

         H = height;
         VH = 1;
         vh_pwr = 0;
         while (VH < H) {
             VH <<= 1;
             vh_pwr++;