sdl_phyuv.c

Simple DirectMedia Layer - Simple DirectMedia Layer 是一个跨平台的多媒体库设计用来提供快速图形framebuffer和音频驱动。应用MPEG为软件

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    [e-mail]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: SDL_phyuv.c,v 1.6 2002/05/28 19:31:32 slouken Exp $";
#endif

/* This is the QNX Realtime Platform version for SDL YUV video overlays */

#include <stdlib.h>
#include <string.h>
#ifndef bool
#define bool char
#define TRUE 1
#define FALSE 0
#endif
#include <errno.h>

#include <Ph.h>
#include <Pt.h>

#include "SDL_error.h"
#include "SDL_video.h"
#include "SDL_phyuv_c.h"
#include "SDL_yuvfuncs.h"

#if 0  //just for reference
/* YUV data formats			FourCC		   Layout		H sample (YUV)	V sample (YUV)	BPP */
#define Pg_VIDEO_FORMAT_IYU1		0x31555949	/* U2Y2Y2V2Y2Y2		144		111		12  */
#define Pg_VIDEO_FORMAT_IYU2		0x32555949	/* U4Y4V4U4Y4V4		111		111		24  */
#define Pg_VIDEO_FORMAT_UYVY		0x59565955	/* U8Y8V8Y8		122		111		16  */
#define Pg_VIDEO_FORMAT_YUY2		0x32595559	/* Y8U8Y8V8		122		111		16  */
#define Pg_VIDEO_FORMAT_YVYU		0x55595659	/* Y8V8Y8U8		122		111		16  */
#define Pg_VIDEO_FORMAT_V422		0x56343232	/* V8Y8U8Y8		122		111		16  */
#define Pg_VIDEO_FORMAT_CLJR		0x524a4c43	/* V6U6Y5Y5Y5Y5		133		111		8   */
#define Pg_VIDEO_FORMAT_YVU9		0x39555659	/* Planar YVU		144		144		9   */
#define Pg_VIDEO_FORMAT_YV12		0x32315659	/* Planar YUV		122		122		12  */

/* There seems to be no FourCC that matches this */
#define Pg_VIDEO_FORMAT_YUV420		0x00000100	/* Planar YUV		122		111		16  */

/* These formats are the same as YV12, except the U and V planes do not have to contiguously follow the Y plane */
/* but they're all the same to us, since we always have 3 plane pointers */
#define Pg_VIDEO_FORMAT_CLPL	Pg_VIDEO_FORMAT_YV12	/* Cirrus Logic Planar format */
#define Pg_VIDEO_FORMAT_VBPL	Pg_VIDEO_FORMAT_YV12	/* VooDoo Banshee planar format */

#define SDL_YV12_OVERLAY	0x32315659	/* Planar mode: Y + V + U */
#define SDL_IYUV_OVERLAY	0x56555949	/* Planar mode: Y + U + V */
#define SDL_YUY2_OVERLAY	0x32595559	/* Packed mode: Y0+U0+Y1+V0 */
#define SDL_UYVY_OVERLAY	0x59565955	/* Packed mode: U0+Y0+V0+Y1 */
#define SDL_YVYU_OVERLAY	0x55595659	/* Packed mode: Y0+V0+Y1+U0 */

#endif 


#define OVERLAY_STATE_UNINIT  0
#define OVERLAY_STATE_ACTIVE 1

/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs ph_yuvfuncs = {
	ph_LockYUVOverlay,
	ph_UnlockYUVOverlay,
	ph_DisplayYUVOverlay,
	ph_FreeYUVOverlay
};


typedef struct {
  int id;
  int width, height;
  int data_size;              /* bytes */
  int num_planes;
  int *pitches;               /* bytes */
  int *offsets;               /* bytes */
  char *data;
  void *obdata;     
} XvImage;


struct private_yuvhwdata {
	XvImage *image;	
	FRAMEDATA *CurrentFrameData;
	FRAMEDATA *FrameData0;
	FRAMEDATA *FrameData1;
	PgScalerProps_t	props;
	PgScalerCaps_t	caps;
	PgVideoChannel_t *channel;
	SDL_Rect CurrentWindow;
	long format;
	int screen_width;
	int screen_height ;
	int screen_bpp ;    //2
	bool planar;
	bool scaler_on ;
	int current;
	long YStride;
	long VStride;
	long UStride;
	long chromakey;
	unsigned long State;
	long flags;
};

extern PgVideoChannel_t * PgCreateVideoChannel(unsigned type, unsigned flags);
extern int PgGetScalerCapabilities( PgVideoChannel_t *channel, int format_index, PgScalerCaps_t *vcaps );
extern int PgConfigScalerChannel(PgVideoChannel_t *channel, PgScalerProps_t *props);
extern void PgDestroyVideoChannel(PgVideoChannel_t *channel);
extern PgColor_t PgGetOverlayChromaColor(void);

void
grab_ptrs2(PgVideoChannel_t *channel, FRAMEDATA *Frame0, FRAMEDATA *Frame1 )
{

	/* Buffers have moved; re-obtain the pointers */
	Frame0->Y = (unsigned char *)PdGetOffscreenContextPtr(channel->yplane1);
	Frame1->Y = (unsigned char *)PdGetOffscreenContextPtr(channel->yplane2);
	Frame0->U = (unsigned char *)PdGetOffscreenContextPtr(channel->uplane1);
	Frame1->U = (unsigned char *)PdGetOffscreenContextPtr(channel->uplane2);
	Frame0->V = (unsigned char *)PdGetOffscreenContextPtr(channel->vplane1);
	Frame1->V = (unsigned char *)PdGetOffscreenContextPtr(channel->vplane2);

}

SDL_Overlay* ph_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
	SDL_Overlay *overlay;
	struct private_yuvhwdata *hwdata;
	int xv_port;
	int rtncode;
//	PhRect_t rect;
//	PhSysInfo_t info;
//	PhRegion_t region;
//	short x, y;
	PtArg_t argt;
	int i =0;
//	bool bCont = TRUE;
	int Priority[20];
	int Type[20];
	int entries, select, highest;

	PhDCSetCurrent(0);  //Need to set draw context to window esp. if we we in Offscreeen mode

	/* Create the overlay structure */
	overlay = (SDL_Overlay *)malloc(sizeof(SDL_Overlay));
        memset(overlay, 0x00, sizeof(SDL_Overlay));
	if ( overlay == NULL ) {
		SDL_OutOfMemory();
		return(NULL);
	}
	memset(overlay, 0, (sizeof *overlay));

	/* Fill in the basic members */
	overlay->format = format;
	overlay->w = width;
	overlay->h = height;
	
	/* Set up the YUV surface function structure */
	overlay->hwfuncs = &ph_yuvfuncs;

	/* Create the pixel data and lookup tables */
	hwdata = (struct private_yuvhwdata *)malloc(sizeof(struct private_yuvhwdata));
        memset(hwdata, 0x00, sizeof(struct private_yuvhwdata));
	overlay->hwdata = hwdata;
	if ( hwdata == NULL ) {
		SDL_OutOfMemory();
		SDL_FreeYUVOverlay(overlay);
		return(NULL);
	}
	
    if (overlay->hwdata->channel == NULL)
    {
        if ((overlay->hwdata->channel = PgCreateVideoChannel(Pg_VIDEO_CHANNEL_SCALER,0)) == NULL) 
        {
            SDL_SetError("ph_CreateYUVOverlay(): Create channel failed: %s\n", strerror( errno ));
            free(overlay->hwdata);
            free(overlay);
            return (NULL);
        }
    }

    overlay->hwdata->CurrentWindow.x = 0;
    overlay->hwdata->CurrentWindow.y = 0;
    overlay->hwdata->CurrentWindow.w = 320;
    overlay->hwdata->CurrentWindow.h = 240;

    overlay->hwdata->State = OVERLAY_STATE_UNINIT;

    overlay->hwdata->screen_bpp = 2;
    overlay->hwdata->scaler_on = FALSE;
    overlay->hwdata->screen_width = 1024;
    overlay->hwdata->screen_height  = 768;

    overlay->hwdata->FrameData0 = (FRAMEDATA *) malloc((size_t)(sizeof(FRAMEDATA)));
    overlay->hwdata->FrameData1 = (FRAMEDATA *) malloc((size_t)(sizeof(FRAMEDATA)));
    memset(overlay->hwdata->FrameData0, 0x00, (size_t)(sizeof(FRAMEDATA)));
    memset(overlay->hwdata->FrameData1, 0x00, (size_t)(sizeof(FRAMEDATA)));

    overlay->hwdata->caps.size = sizeof(overlay->hwdata->caps);

//Note you really don't need to do this for SDL as you are given a format, but this is a good example

    xv_port = -1;
    i=0;

while(PgGetScalerCapabilities(overlay->hwdata->channel, i++, &(overlay->hwdata->caps)) == 0) 
{
		if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_YV12) //in SDL
		{
			
			Priority[i-1] = 0;
			Type[i-1] = Pg_VIDEO_FORMAT_YV12;
			if(format == Pg_VIDEO_FORMAT_YV12)
			{
				overlay->hwdata->props.format =  Pg_VIDEO_FORMAT_YV12;
				xv_port = 1; //supported
				Priority[i-1] = 100; //force selected
			}
			
		}
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_YVU9) //in SDL
		{
			
			Priority[i-1] = 0;
			Type[i-1] = Pg_VIDEO_FORMAT_YVU9;			
			if(format == Pg_VIDEO_FORMAT_YVU9)
			{
				overlay->hwdata->props.format =  Pg_VIDEO_FORMAT_YVU9;
				xv_port = 1; //supported
				Priority[i-1] = 100; //force selected
			}
			
		}
#if 0 //this part of SDL is YUV specific
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_RGB555)
		{
			
			Priority[i-1] = 3;
			Type[i-1] = Pg_VIDEO_FORMAT_RGB555;			
		}
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_RGB565)
		{
			
			Priority[i-1] =  2;
			Type[i-1] = Pg_VIDEO_FORMAT_RGB565;			
		}
		else if(overlay->hwdata->caps.format == Pg_VIDEO_FORMAT_RGB8888)
		{
			
			Priority[i-1] = 1;
			Type[i-1] = Pg_VIDEO_FORMAT_RGB8888;			
		}
#endif
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_IYU1)
		{
			
			Priority[i-1] = 0;
			Type[i-1] = Pg_VIDEO_FORMAT_IYU1;
			
		}
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_IYU2)
		{
			
			Priority[i-1] = 0;
			Type[i-1] = Pg_VIDEO_FORMAT_IYU2;			
		}

		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_UYVY) //in SDL
		{
			
			Priority[i-1] = 7;
			Type[i-1] = Pg_VIDEO_FORMAT_UYVY;
			if(format == Pg_VIDEO_FORMAT_UYVY)
			{
				overlay->hwdata->props.format =  Pg_VIDEO_FORMAT_UYVY;
				xv_port = 1; //supported
				Priority[i-1] = 100; //force selected
			}
			
		}
		else if(overlay->hwdata->caps.format == Pg_VIDEO_FORMAT_YUY2) //in SDL
		{
			
			Priority[i-1] = 8;
			Type[i-1] = Pg_VIDEO_FORMAT_YUY2;			
			if(format == Pg_VIDEO_FORMAT_YUY2)
			{
				overlay->hwdata->props.format =  Pg_VIDEO_FORMAT_YUY2;
				xv_port = 1; //supported
				Priority[i-1] = 100; //force selected
			}
			
		}
		else if(overlay->hwdata->caps.format  == Pg_VIDEO_FORMAT_YVYU) //in SDL
		{
			
			Priority[i-1] = 4;
			Type[i-1] = Pg_VIDEO_FORMAT_YVYU;	
			
			if(format == Pg_VIDEO_FORMAT_YVYU)
			{
				overlay->hwdata->props.format =  Pg_VIDEO_FORMAT_YVYU;
				xv_port = 1; //supported
				Priority[i-1] = 100; //force selected
				
			}