dm642OSD叠加代码

/* * Copyright 2003 by Texas Instruments Incorporated. * All rights reserved. Property of Texas Instruments Incorporated. * Restricted rights to use, duplicate or disclose this code are * granted through contract. * */ /* "@(#) DDK 1.10.00.21 06-26-03 (ddk-b10)" */ #include <std.h> #include <tsk.h> #include <sem.h> #include <gio.h> #include <csl_dat.h> #include <csl_cache.h> #include <fvid.h> #include <edc.h> #include <vport.h> #include <vportcap.h> #include <vportdis.h> #include <saa7105.h> #include <saa7115.h> #include <evmdm642.h> #include "evmdm642_vcapparams.h" #include "evmdm642_vdisparams.h" /* heap IDs defined in the BIOS configuration file */ extern Int EXTERNALHEAP; /* * ======== main ======== */ main() { /******************************************************/ /* open CSL DAT module for fast copy */ /******************************************************/ CSL_init(); CACHE_clean(CACHE_L2ALL, 0, 0); CACHE_setL2Mode(CACHE_256KCACHE); CACHE_enableCaching(CACHE_EMIFA_CE00); CACHE_enableCaching(CACHE_EMIFA_CE01); DAT_open(DAT_CHAANY, DAT_PRI_LOW, DAT_OPEN_2D); } extern void tskOSD(); /* * ======== tskVideoLoopback ======== * video loopback function. */ void tskVideoLoopback() { Int status; FVID_Handle disChan; Int frames = 0; FVID_Frame *disFrameBuf; Int numLinesDis = EVMDM642_vDisParamsChan.imgVSizeFld1; Int numLinesCap = EVMDM642_vCapParamsChan.fldYStop1 - EVMDM642_vCapParamsChan.fldYStrt1+1; Int numLines = (numLinesDis > numLinesCap) ? numLinesCap : numLinesDis; Int i; FVID_Handle capChan; Int numPixels = EVMDM642_vCapParamsChan.fldXStop1 - EVMDM642_vCapParamsChan.fldXStrt1+1; FVID_Frame *capFrameBuf; Int capLinePitch = EVMDM642_vCapParamsChan.fldXStop1 - EVMDM642_vCapParamsChan.fldXStrt1+1; Int disLinePitch = EVMDM642_vDisParamsChan.imgHSizeFld1; numLines *= 2; /* both fields */ /******************************************************/ /* allocate both capture and display frame buffers */ /* in external heap memory */ /******************************************************/ EVMDM642_vCapParamsChan.segId = EXTERNALHEAP; EVMDM642_vDisParamsChan.segId = EXTERNALHEAP; EVMDM642_vDisParamsSAA7105.hI2C = EVMDM642_I2C_hI2C; EVMDM642_vCapParamsSAA7115.hI2C = EVMDM642_I2C_hI2C; /******************************************************/ /* initialization of capture driver */ /******************************************************/ capChan = FVID_create("/VP0CAPTURE/A/0", IOM_INPUT, &status, (Ptr)&EVMDM642_vCapParamsChan, NULL); /******************************************************/ /* initialization of display driver */ /******************************************************/ disChan = FVID_create("/VP2DISPLAY", IOM_OUTPUT, &status, (Ptr)&EVMDM642_vDisParamsChan, NULL); /******************************************************/ /* configure video encoder & decoder */ /******************************************************/ for ( i=0;i<6;i++ ) { FVID_control(disChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, (Ptr)&EVMDM642_vDisParamsSAA7105); FVID_control(capChan, VPORT_CMD_EDC_BASE + EDC_CONFIG, (Ptr)&EVMDM642_vCapParamsSAA7115); } /******************************************************/ /* start capture & display operation */ /******************************************************/ FVID_control(disChan, VPORT_CMD_START, NULL); FVID_control(capChan, VPORT_CMD_START, NULL); /* Now that capture & display are going, start OSD task */ TSK_create((Fxn)&tskOSD, &TSK_ATTRS); /********************************************************/ /* request a frame buffer from display & capture driver */ /********************************************************/ FVID_alloc(capChan, &capFrameBuf); FVID_alloc(disChan, &disFrameBuf); frames ++; while(1){/* loop forever */ /* copy data from capture buffer to display buffer */ /***************************************************/ for(i = 0; i < numLines; i ++) { DAT_copy(capFrameBuf->frame.iFrm.y1 + i * capLinePitch, disFrameBuf->frame.iFrm.y1 + i * disLinePitch, numPixels); DAT_copy(capFrameBuf->frame.iFrm.cb1 + i * (capLinePitch >> 1), disFrameBuf->frame.iFrm.cb1 + i * (disLinePitch >> 1), numPixels>>1); DAT_copy(capFrameBuf->frame.iFrm.cr1 + i * (capLinePitch >> 1), disFrameBuf->frame.iFrm.cr1 + i * (disLinePitch >> 1), numPixels>>1); } FVID_exchange(capChan, &capFrameBuf); FVID_exchange(disChan, &disFrameBuf); frames ++; } }