Hi,
I want to use the YUV format and its a different format. In that case
do I need to only change the Surface Flinger to use the Open GL
extension for YUV format. Is there some other module which needs to
change?
Does currently Android 1.0 Release has Open GL extensions for the YUV
format?
Thanks,
-Shirish
On Dec 4, 2:44 pm, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> yuv422 to rgb565 doesn't work well
>
> uint32_t mCoefTbl32[516];
> uint8_t *mCoefTbl = NULL;
> static void init_coff()
> {
> uint8_t *clip;
> int i;
> mCoefTbl = (uint8_t *)mCoefTbl32;
> *((uint32_t*)mCoefTbl) = (int)(65536*0.4681); //0.714);
> *((uint32_t*)(mCoefTbl+4)) = (int)(65536*1.5748);//1.402);
> *((uint32_t*)(mCoefTbl+8)) = (int)(65536*0.1873);//0.344);
> *((uint32_t*)(mCoefTbl+12)) = (int)(65536*1.8556);//1.772);
>
> clip = mCoefTbl + 400;
> /* do 5 bit conversion */
> memset( &clip[-384], 0, 385*sizeof( *clip));
> memset( &clip[ 640], 0, 385*sizeof( *clip));
>
> for (i=1; i<255; i++){ // range of (x>>3) between -24 and 56
> clip[i] = i>>3;
> clip[i+1024] = i>>2;
> }
> memset( &clip[255], 31, 385*sizeof( *clip));
> memset( &clip[1279], 63, 385*sizeof( *clip));
>
> }
>
> static int32_t cc16(uint16_t *pY,uint8_t *pCb, uint8_t *pCr, uint8_t
> *dst, int32_t *disp, uint8_t *coff_tbl)
> {
> #define OFFSET_5_0 2
> #define OFFSET_6_0 (1+1024)
> #define OFFSET_5_1 6
> #define OFFSET_6_1 (3+1024)
>
> uint16_t *pDst;
> int32_t src_pitch, dst_pitch, src_width;
> int32_t Y, Cb, Cr, Cg;
> int32_t deltaY, deltaDst, deltaCbCr;
> int32_t row, col;
> int32_t tmp0, tmp1, tmp2;
> uint32_t rgb;
> uint8_t *clip = coff_tbl+400;
> int32_t cc1 = (*((int32_t*)(clip - 400)));
> int32_t cc3 = (*((int32_t*)(clip - 396)));
> int32_t cc2 = (*((int32_t*)(clip - 392)));
> int32_t cc4 = (*((int32_t*)(clip - 388)));
>
> src_pitch = disp[0];
> dst_pitch = disp[1];
> src_width = disp[2];
>
> if(disp[6]) /* rotate 180 and flip */
> { /* move the starting point to the bottom-left corner of the
> picture */
> deltaY = src_pitch*(disp[3]-1);
> deltaY = (src_pitch>>1)*((disp[3]>>1)-1);
> deltaY = -src_width-(src_pitch<<1);
> deltaCbCr = -((src_width+src_pitch)>>1);
> src_pitch = -(src_pitch>>1);
> }
> else
> {
> deltaY = (src_pitch<<1)-src_width;
> deltaCbCr = (src_pitch-src_width)>>1;
> src_pitch >>= 1;
> }
>
> deltaDst = (dst_pitch<<1)-src_width;
> pDst = (uint16_t *)dst;
>
> for(row = disp[3]; row >0; row-=2){
>
> for(col = src_width-1; col >=0; col-=2){
>
> Cb = *pCb++; Cr = *pCr++;
> Y = pY[src_pitch];
>
> Cb -= 128; Cr -= 128;
> Cg = Cr*cc1;
> Cr *= cc3;
>
> Cg += Cb*cc2;
> Cb *= cc4;
>
> tmp0 = (Y & 0xFF); //Low endian left pixel
> tmp0 += OFFSET_5_0;
>
> tmp1 = tmp0 - (Cg>>16);
> tmp2 = tmp0 + (Cb>>16);
> tmp0 = tmp0 + (Cr>>16);
>
> tmp0 = clip[tmp0];
> tmp1 = clip[tmp1 + OFFSET_6_0 - OFFSET_5_0];
> tmp2 = clip[tmp2];
> //RGB_565
>
> rgb = tmp1|(tmp0<<6);
> rgb = tmp2|(rgb<<5);
>
> Y = (Y>>8) & 0xFF;
>
> Y += OFFSET_5_1;
> tmp1 = (Y) - (Cg>>16);
> tmp2 = (Y) + (Cb>>16);
> tmp0 = (Y) + (Cr>>16);
>
> tmp0 = clip[tmp0];
> tmp1 = clip[tmp1 + OFFSET_6_1 - OFFSET_5_1];
> tmp2 = clip[tmp2];
>
> //RGB_565
>
> tmp0 = tmp1|(tmp0<<6);
> tmp0 = tmp2|(tmp0<<5);
>
> rgb |= (tmp0<<16);
>
> *( (uint32_t*)(pDst+dst_pitch) ) = rgb;
>
> //load the top two pixels
> Y = *pY++;
>
> tmp0 = (Y & 0xFF); //Low endian left pixel
> tmp0 += OFFSET_5_1;
>
> tmp1 = tmp0 - (Cg>>16);
> tmp2 = tmp0 + (Cb>>16);
> tmp0 = tmp0 + (Cr>>16);
>
> tmp0 = clip[tmp0];
> tmp1 = clip[tmp1 + OFFSET_6_1 - OFFSET_5_1];
> tmp2 = clip[tmp2];
> //RGB_565
>
> rgb = tmp1|(tmp0<<6);
> rgb = tmp2|(rgb<<5);
>
> Y = (Y>>8) & 0xFF;
>
> Y += OFFSET_5_0;
> tmp1 = (Y) - (Cg>>16);
> tmp2 = (Y) + (Cb>>16);
> tmp0 = (Y) + (Cr>>16);
>
> tmp0 = clip[tmp0];
> tmp1 = clip[tmp1 + OFFSET_6_0 - OFFSET_5_0];
> tmp2 = clip[tmp2];
>
> //RGB_565
>
> tmp0 = tmp1|(tmp0<<6);
> tmp0 = tmp2|(tmp0<<5);
>
> rgb |= (tmp0<<16);
> *( (uint32_t *)pDst) = rgb; pDst+=2;
>
> }//end of COL
>
> pY += (deltaY>>1);
> pCb += deltaCbCr;
> pCr += deltaCbCr;
> pDst+= (deltaDst); //coz pDst defined as UINT *
> }
> return 1;
>
> }
>
> On 11月19日, 下午5时02分, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
>
>
>
> > thanks very much,cpu is pxa300,camera only provides yuv422 & RawRGB,
>
> > "On the G1 we use another code path to draw video frames" which
> > path,thanks~
>
> > On 11月19日, 下午4时07分, Mathias Agopian <[EMAIL PROTECTED]> wrote:
>
> > > Hi,
>
> > > On Tue, Nov 18, 2008 at 11:15 PM, [EMAIL PROTECTED]
>
> > > <[EMAIL PROTECTED]> wrote:
>
> > > > the camera provide yuv422 data,butopenGL"just show the Y plane of
> > > >YUVbuffers"(frameworks\base\libs\surfaceflinger\LayerBase.cpp
> > > > 624),must convert yuv422 to rgb565,camera preview is ok,a little
> > > > slow,why,thanks
>
> > > No,OpenGLdoesn't supportYUVtextures. That's just that.
>
> > > On the G1 we use another code path to draw video frames, it doesn't
> > > useOpenGLES, instead it uses the 2D engine. The code that you are
> > > referring to exists only so that theYUVvideo node will display
> > > "something" when used on the emulator or on a device that doesn't do
> > >YUV(in which case the video node should not try to produceYUV
> > > output). It's mostly there for debugging.
>
> > > Of course, *some*YUVextensions forOpenGLES exist, and the code
> > > in SurfaceFlinger doesn't make use of them at this time. Exercise left
> > > to the reader... or until real h/w with these capabilities falls into
> > > my hands.
>
> > > What h/w are you using?
>
> > > Mathias- 隐藏被引用文字 -
>
> > - 显示引用的文字 -- Hide quoted text -
>
> - Show quoted text -
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