C++ CLIP函数代码示例

bool CGondolierSlider::SignalObject(CSignalObject *msg) {
	_arrayIndex = CLIP(_arrayIndex, 0, 10);
	_sliderRect1 = _sliderRect2;
	_sliderRect1.translate(_bounds.left, _bounds.top);
	_sliderRect1.translate(0, ARRAY[_arrayIndex]);
	loadFrame(_arrayIndex);

	CSignalObject signalMsg;
	signalMsg._numValue = 10 - _arrayIndex;
	signalMsg._strValue = _fieldFC ? "Fly" : "Tos";
	signalMsg.execute(_string3);

	return true;
}

int HSV::hsv_to_yuv(int &y, int &u, int &v, float h, float s, float va, int max)
{
	float r, g, b;
	int r_i, g_i, b_i;
	HSV::hsv_to_rgb(r, g, b, h, s, va);
	r = r * max + 0.5;
	g = g * max + 0.5;
	b = b * max + 0.5;
	r_i = (int)CLIP(r, 0, max);
	g_i = (int)CLIP(g, 0, max);
	b_i = (int)CLIP(b, 0, max);

	int y2, u2, v2;
	if(max == 0xffff)
		yuv_static.rgb_to_yuv_16(r_i, g_i, b_i, y2, u2, v2);
	else
		yuv_static.rgb_to_yuv_8(r_i, g_i, b_i, y2, u2, v2);
	y = y2;
	u = u2;
	v = v2;

	return 0;
}

  float setMaxFreq ( t_CKFLOAT p )
  {
	const float nyquist = srate / 2;
	if (p == 0) p = nyquist;
	float max = CLIP(p, minfreq, nyquist);
	if (max != maxfreq)
	  {
		maxfreq = max;
		spectdelay->set_delay_freqrange(minfreq, maxfreq);
		spectdelay->set_freqrange(minfreq, maxfreq);
	  }
    
    return max;
  }

void MidiPlayer::setVolume(int volume) {
	volume = CLIP(volume, 0, 255);
	if (_masterVolume == volume)
		return;

	Common::StackLock lock(_mutex);

	_masterVolume = volume;
	for (int i = 0; i < kNumChannels; ++i) {
		if (_channelsTable[i]) {
			_channelsTable[i]->volume(_channelsVolume[i] * _masterVolume / 255);
		}
	}
}

bool TheoraDecoder::VorbisAudioTrack::decodeSamples() {
	float **pcm;

	// if there's pending, decoded audio, grab it
	int ret = vorbis_synthesis_pcmout(&_vorbisDSP, &pcm);

	if (ret > 0) {
		if (!_audioBuffer) {
			_audioBuffer = (ogg_int16_t *)malloc(AUDIOFD_FRAGSIZE * sizeof(ogg_int16_t));
			assert(_audioBuffer);
		}

		int channels = _audStream->isStereo() ? 2 : 1;
		int count = _audioBufferFill / 2;
		int maxsamples = ((AUDIOFD_FRAGSIZE - _audioBufferFill) / channels) >> 1;
		int i;

		for (i = 0; i < ret && i < maxsamples; i++) {
			for (int j = 0; j < channels; j++) {
				int val = CLIP((int)rint(pcm[j][i] * 32767.f), -32768, 32767);
				_audioBuffer[count++] = val;
			}
		}

		vorbis_synthesis_read(&_vorbisDSP, i);
		_audioBufferFill += (i * channels) << 1;

		if (_audioBufferFill == AUDIOFD_FRAGSIZE) {
			byte flags = Audio::FLAG_16BITS;

			if (_audStream->isStereo())
				flags |= Audio::FLAG_STEREO;

#ifdef SCUMM_LITTLE_ENDIAN
			flags |= Audio::FLAG_LITTLE_ENDIAN;
#endif

			_audStream->queueBuffer((byte *)_audioBuffer, AUDIOFD_FRAGSIZE, DisposeAfterUse::YES, flags);

			// The audio mixer is now responsible for the old audio buffer.
			// We need to create a new one.
			_audioBuffer = 0;
			_audioBufferFill = 0;
		}

		return true;
	}

	return false;
}

mlib_status
mlib_ImageAffine_s16_3ch_nn(
	mlib_affine_param *param)
{
	DECLAREVAR_NN();
	DTYPE *dstLineEnd;

	for (j = yStart; j <= yFinish; j++) {
		mlib_s32 pix0, pix1, pix2;

		CLIP(3);
		dstLineEnd = (DTYPE *) dstData + 3 * xRight;

		ySrc = MLIB_POINTER_SHIFT(Y);
		Y += dY;
		xSrc = X >> MLIB_SHIFT;
		X += dX;
		srcPixelPtr = MLIB_POINTER_GET(lineAddr, ySrc) + 3 * xSrc;
		pix0 = srcPixelPtr[0];
		pix1 = srcPixelPtr[1];
		pix2 = srcPixelPtr[2];
		ySrc = MLIB_POINTER_SHIFT(Y);
		Y += dY;
		xSrc = X >> MLIB_SHIFT;
		X += dX;
#ifdef __SUNPRO_C
#pragma pipeloop(0)
#endif /* __SUNPRO_C */
		for (; dstPixelPtr < dstLineEnd; dstPixelPtr += 3) {
			srcPixelPtr =
				MLIB_POINTER_GET(lineAddr, ySrc) + 3 * xSrc;
			ySrc = MLIB_POINTER_SHIFT(Y);
			Y += dY;
			xSrc = X >> MLIB_SHIFT;
			X += dX;
			dstPixelPtr[0] = pix0;
			dstPixelPtr[1] = pix1;
			dstPixelPtr[2] = pix2;
			pix0 = srcPixelPtr[0];
			pix1 = srcPixelPtr[1];
			pix2 = srcPixelPtr[2];
		}

		dstPixelPtr[0] = pix0;
		dstPixelPtr[1] = pix1;
		dstPixelPtr[2] = pix2;
	}

	return (MLIB_SUCCESS);
}

void MusicPlayer::setVolume(int volume) {
	Common::StackLock lock(_mutex);

	volume = CLIP(volume, 0, 255);
	if (_masterVolume == volume)
		return;
	_masterVolume = volume;

	for (int i = 0; i < 16; ++i) {
		if (_channel[i]) {
			setChannelVolume(i);
		}
	}
}

void ConsoleWindow::highlightClip(uint32 &x, uint32 &y) const {
	y = CLIP<uint32>(y, 0, _lines.size());

	uint32 minX, maxX;
	if        (y == 0) {
		minX = _prompt->get().size();
		maxX = _prompt->get().size() + _input->get().size();
	} else {
		minX = 0;
		maxX = _lines[_lines.size() - y]->get().size();
	}

	x = CLIP(x, minX, maxX);
}

/*
 * accumulate a blockquote.
 *
 * one sick horrible thing about blockquotes is that even though
 * it just takes ^> to start a quote, following lines, if quoted,
 * assume that the prefix is ``> ''.   This means that code needs
 * to be indented *5* spaces from the leading '>', but *4* spaces
 * from the start of the line.   This does not appear to be 
 * documented in the reference implementation, but it's the
 * way the markdown sample web form at Daring Fireball works.
 */
static Line *
quoteblock(Paragraph *p, DWORD flags)
{
    Line *t, *q;
    int qp;

    for ( t = p->text; t ; t = q ) {
	if ( isquote(t) ) {
	    /* clip leading spaces */
	    for (qp = 0; T(t->text)[qp] != '>'; qp ++)
		/* assert: the first nonblank character on this line
		 * will be a >
		 */;
	    /* clip '>' */
	    qp++;
	    /* clip next space, if any */
	    if ( T(t->text)[qp] == ' ' )
		qp++;
	    CLIP(t->text, 0, qp);
	    UNCHECK(t);
	    t->dle = mkd_firstnonblank(t);
	}

	q = skipempty(t->next);

	if ( (q == 0) || ((q != t->next) && (!isquote(q) || isdivmarker(q,1,flags))) ) {
	    ___mkd_freeLineRange(t, q);
	    t = q;
	    break;
	}
    }
    if ( isdivmarker(p->text,0,flags) ) {
	char *prefix = "class";
	int i;
	
	q = p->text;
	p->text = p->text->next;

	if ( (i = szmarkerclass(1+T(q->text))) == 3 )
	    /* and this would be an "%id:" prefix */
	    prefix="id";
	    
	if ( p->ident = malloc(4+strlen(prefix)+S(q->text)) )
	    sprintf(p->ident, "%s=\"%.*s\"", prefix, S(q->text)-(i+2),
						     T(q->text)+(i+1) );

	___mkd_freeLine(q);
    }
    return t;
}

bool CGondolierSlider::SignalObject(CSignalObject *msg) {
	_sliderIndex = CLIP(_sliderIndex, 0, 10);
	_thumbRect = _defaultThumbRect;
	_thumbRect.translate(_bounds.left, _bounds.top);
	_thumbRect.translate(0, Y_OFFSETS[_sliderIndex]);
	loadFrame(_sliderIndex);

	CSignalObject signalMsg;
	signalMsg._numValue = 10 - _sliderIndex;
	signalMsg._strValue = _sliderNum ? "Fly" : "Tos";
	signalMsg.execute(_signalTarget);

	return true;
}

void process (struct dt_iop_module_t *self, dt_dev_pixelpipe_iop_t *piece, void *ivoid, void *ovoid, const dt_iop_roi_t *roi_in, const dt_iop_roi_t *roi_out)
{
  dt_iop_relight_data_t *data = (dt_iop_relight_data_t *)piece->data;
  const int ch = piece->colors;

  // Precalculate parameters for gauss function
  const float a = 1.0;                                                                // Height of top
  const float b = -1.0+(data->center*2);                                 // Center of top
  const float c = (data->width/10.0)/2.0;      				                    // Width

#ifdef _OPENMP
  #pragma omp parallel for default(none) shared(roi_out, ivoid, ovoid, data) schedule(static)
#endif
  for(int k=0; k<roi_out->height; k++)
  {
    float *in = ((float *)ivoid) + ch*k*roi_out->width;
    float *out = ((float *)ovoid) + ch*k*roi_out->width;
    for(int j=0; j<roi_out->width; j++,in+=ch,out+=ch)
    {
      const float lightness = in[0]/100.0;
      const float x = -1.0+(lightness*2.0);
      float gauss = GAUSS(a,b,c,x);

      if(isnan(gauss) || isinf(gauss))
        gauss = 0.0;

      float relight = 1.0 / exp2f ( -data->ev * CLIP(gauss));

      if(isnan(relight) || isinf(relight))
        relight = 1.0;

      out[0] = 100.0*CLIP (lightness*relight);
      out[1] = in[1];
      out[2] = in[2];
    }
  }
}

/*jpeg decoding  420 planar to 422
* args: 
*      out: pointer to data output of idct (macroblocks yyyy u v)
*      pic: pointer to picture buffer (yuyv)
*      stride: picture stride
*/
static void yuv420pto422(int * out,uint8_t *pic,int stride)
{
	int j, k;
	uint8_t *pic0, *pic1;
	int *outy, *outu, *outv;
	int outy1 = 0;
	int outy2 = 8;

	//yyyyuv
	pic0 = pic;
	pic1 = pic + stride;
	outy = out;
	outu = out + 64 * 4;
	outv = out + 64 * 5;    
	for (j = 0; j < 8; j++) 
	{
		for (k = 0; k < 8; k++)
		{
			if( k == 4) 
			{ 
				outy1 += 56;
				outy2 += 56;
			}
			*pic0++ = CLIP(outy[outy1]);   //y1 line 1
			*pic0++ = CLIP(128 + *outu);   //u  line 1-2
			*pic0++ = CLIP(outy[outy1+1]); //y2 line 1
			*pic0++ = CLIP(128 + *outv);   //v  line 1-2
			*pic1++ = CLIP(outy[outy2]);   //y1 line 2
			*pic1++ = CLIP(128 + *outu);   //u  line 1-2
			*pic1++ = CLIP(outy[outy2+1]); //y2 line 2
			*pic1++ = CLIP(128 + *outv);   //v  line 1-2
			outy1 +=2; outy2 += 2; outu++; outv++;
		}
		if(j==3)
		{
			outy = out + 128;
		} 
		else 
		{
			outy += 16;
		}
		outy1 = 0;
		outy2 = 8;
		pic0 += 2 * (stride -16);
		pic1 += 2 * (stride -16);
	}
}

int
pcmfile_seek_samples(PcmFile *pf, int64_t offset, int whence)
{
    int64_t byte_offset;
    uint64_t newpos, fpos, dst, dsz;

    if(pf == NULL || pf->io.fp == NULL) return -1;
    if(pf->block_align <= 0) return -1;
    if(pf->filepos < pf->data_start) return -1;
    if(pf->data_size == 0) return 0;

    fpos = pf->filepos;
    dst = pf->data_start;
    dsz = pf->data_size;
    byte_offset = offset;
    byte_offset *= pf->block_align;

    // calculate new destination within file
    switch(whence) {
        case PCM_SEEK_SET:
            newpos = dst + CLIP(byte_offset, 0, (int64_t)dsz);
            break;
        case PCM_SEEK_CUR:
            newpos = fpos - MIN(-byte_offset, (int64_t)(fpos - dst));
            newpos = MIN(newpos, dst + dsz);
            break;
        case PCM_SEEK_END:
            newpos = dst + dsz - CLIP(byte_offset, 0, (int64_t)dsz);
            break;
        default: return -1;
    }

    // seek to the destination point
    if(pcmfile_seek_set(pf, newpos)) return -1;

    return 0;
}

t_jit_err jit_gl_videoplane_draw(t_jit_gl_videoplane *x)
{
	t_jit_err result = JIT_ERR_NONE;
	GLenum prim;
	
	CLIP (x->nudge,0.,0.5);
	prim = (x->gridmode) ? GL_TRIANGLE_STRIP : GL_QUAD_STRIP;
	
	if (x->recalc) {
		jit_gl_videoplane_recalc(x);
		if (x->displaylist) 
		{
			t_jit_gl_context ctx;
			
			// cache/restore context in case in capture mode
			ctx = jit_gl_get_context();			
			jit_ob3d_set_context(x);
			
			if (x->dlref) {
				glDeleteLists(x->dlref,1);
				x->dlref = 0;
			}
			if (x->dlref=glGenLists(1)) {
				glNewList(x->dlref, GL_COMPILE);
				if (x->chunk&&x->chunk->m_vertex) 
					draw_grid(x,x->chunk->m_vertex, prim);
				glEndList();
			}
		
			jit_gl_set_context(ctx);
		}		
		x->recalc = 0;
	}
	
	// draw our chunk of OpenGL geometry. 
	if (x->chunk&&x->chunk->m_vertex) {
		if (!jit_attr_getlong(x,gensym("matrixoutput"))) {
			if (x->displaylist&&x->dlref)
				glCallList(x->dlref);
			else 
				draw_grid(x,x->chunk->m_vertex, prim);
		} else{
			color_surface(x);
			result = jit_ob3d_draw_chunk(x->ob3d, x->chunk); //output matrix
		}
	}	
	
	return result;
}

static Line *
headerblock(Paragraph *pp, int htyp)
{
    Line *ret = 0;
    Line *p = pp->text;
    int i, j;

    switch (htyp) {
    case SETEXT:
	    /* p->text is header, p->next->text is -'s or ='s
	     */
	    pp->hnumber = (T(p->next->text)[0] == '=') ? 1 : 2;
	    
	    ret = p->next->next;
	    ___mkd_freeLine(p->next);
	    p->next = 0;
	    break;

    case ETX:
	    /* p->text is ###header###, so we need to trim off
	     * the leading and trailing `#`'s
	     */

	    for (i=0; (T(p->text)[i] == T(p->text)[0]) && (i < S(p->text)-1)
						       && (i < 6); i++)
		;

	    pp->hnumber = i;

	    while ( (i < S(p->text)) && isspace(T(p->text)[i]) )
		++i;

	    CLIP(p->text, 0, i);
	    UNCHECK(p);

	    for (j=S(p->text); (j > 1) && (T(p->text)[j-1] == '#'); --j)
		;

	    while ( j && isspace(T(p->text)[j-1]) )
		--j;

	    S(p->text) = j;

	    ret = p->next;
	    p->next = 0;
	    break;
    }
    return ret;
}