Add av_ prefix to clip functions

Originally committed as revision 8122 to svn://svn.ffmpeg.org/ffmpeg/trunk

34 files changed, 178 insertions, 178 deletions

diff --git a/ffmpeg.c b/ffmpeg.c
index 41150223a5..ff33f85d6f 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -475,7 +475,7 @@ static void do_audio_out(AVFormatContext *s,
                         fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
                 }
             }else if(audio_sync_method>1){
-                int comp= clip(delta, -audio_sync_method, audio_sync_method);
+                int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
                 assert(ost->audio_resample);
                 if(verbose > 2)
                     fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);
diff --git a/libavcodec/adpcm.c b/libavcodec/adpcm.c
index 1b01103c8d..59be8e59d6 100644
--- a/libavcodec/adpcm.c
+++ b/libavcodec/adpcm.c
@@ -209,7 +209,7 @@ static inline unsigned char adpcm_ima_compress_sample(ADPCMChannelStatus *c, sho
     int nibble = FFMIN(7, abs(delta)*4/step_table[c->step_index]) + (delta<0)*8;
     c->prev_sample = c->prev_sample + ((step_table[c->step_index] * yamaha_difflookup[nibble]) / 8);
     CLAMP_TO_SHORT(c->prev_sample);
-    c->step_index = clip(c->step_index + index_table[nibble], 0, 88);
+    c->step_index = av_clip(c->step_index + index_table[nibble], 0, 88);
     return nibble;
 }
 
@@ -224,7 +224,7 @@ static inline unsigned char adpcm_ms_compress_sample(ADPCMChannelStatus *c, shor
     else          bias=-c->idelta/2;
 
     nibble= (nibble + bias) / c->idelta;
-    nibble= clip(nibble, -8, 7)&0x0F;
+    nibble= av_clip(nibble, -8, 7)&0x0F;
 
     predictor += (signed)((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
     CLAMP_TO_SHORT(predictor);
@@ -254,7 +254,7 @@ static inline unsigned char adpcm_yamaha_compress_sample(ADPCMChannelStatus *c,
     c->predictor = c->predictor + ((c->step * yamaha_difflookup[nibble]) / 8);
     CLAMP_TO_SHORT(c->predictor);
     c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
-    c->step = clip(c->step, 127, 24567);
+    c->step = av_clip(c->step, 127, 24567);
 
     return nibble;
 }
@@ -324,8 +324,8 @@ static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
             if(version == CODEC_ID_ADPCM_MS) {
                 const int predictor = ((nodes[j]->sample1 * c->coeff1) + (nodes[j]->sample2 * c->coeff2)) / 256;
                 const int div = (sample - predictor) / step;
-                const int nmin = clip(div-range, -8, 6);
-                const int nmax = clip(div+range, -7, 7);
+                const int nmin = av_clip(div-range, -8, 6);
+                const int nmax = av_clip(div+range, -7, 7);
                 for(nidx=nmin; nidx<=nmax; nidx++) {
                     const int nibble = nidx & 0xf;
                     int dec_sample = predictor + nidx * step;
@@ -372,8 +372,8 @@ static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
 #define LOOP_NODES(NAME, STEP_TABLE, STEP_INDEX)\
                 const int predictor = nodes[j]->sample1;\
                 const int div = (sample - predictor) * 4 / STEP_TABLE;\
-                int nmin = clip(div-range, -7, 6);\
-                int nmax = clip(div+range, -6, 7);\
+                int nmin = av_clip(div-range, -7, 6);\
+                int nmax = av_clip(div+range, -6, 7);\
                 if(nmin<=0) nmin--; /* distinguish -0 from +0 */\
                 if(nmax<0) nmax--;\
                 for(nidx=nmin; nidx<=nmax; nidx++) {\
@@ -381,9 +381,9 @@ static void adpcm_compress_trellis(AVCodecContext *avctx, const short *samples,
                     int dec_sample = predictor + (STEP_TABLE * yamaha_difflookup[nibble]) / 8;\
                     STORE_NODE(NAME, STEP_INDEX);\
                 }
-                LOOP_NODES(ima, step_table[step], clip(step + index_table[nibble], 0, 88));
+                LOOP_NODES(ima, step_table[step], av_clip(step + index_table[nibble], 0, 88));
             } else { //CODEC_ID_ADPCM_YAMAHA
-                LOOP_NODES(yamaha, step, clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
+                LOOP_NODES(yamaha, step, av_clip((step * yamaha_indexscale[nibble]) >> 8, 127, 24567));
 #undef LOOP_NODES
 #undef STORE_NODE
             }
@@ -734,7 +734,7 @@ static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned c
     c->predictor += (c->step * yamaha_difflookup[nibble]) / 8;
     CLAMP_TO_SHORT(c->predictor);
     c->step = (c->step * yamaha_indexscale[nibble]) >> 8;
-    c->step = clip(c->step, 127, 24567);
+    c->step = av_clip(c->step, 127, 24567);
     return c->predictor;
 }
 
@@ -974,10 +974,10 @@ static int adpcm_decode_frame(AVCodecContext *avctx,
         n = buf_size - 7 * avctx->channels;
         if (n < 0)
             return -1;
-        block_predictor[0] = clip(*src++, 0, 7);
+        block_predictor[0] = av_clip(*src++, 0, 7);
         block_predictor[1] = 0;
         if (st)
-            block_predictor[1] = clip(*src++, 0, 7);
+            block_predictor[1] = av_clip(*src++, 0, 7);
         c->status[0].idelta = (int16_t)((*src & 0xFF) | ((src[1] << 8) & 0xFF00));
         src+=2;
         if (st){
@@ -1299,8 +1299,8 @@ return -1;
 
                 c->status[i].step_index += table[delta & (~signmask)];
 
-                c->status[i].step_index = clip(c->status[i].step_index, 0, 88);
-                c->status[i].predictor = clip(c->status[i].predictor, -32768, 32767);
+                c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
+                c->status[i].predictor = av_clip(c->status[i].predictor, -32768, 32767);
 
                 *samples++ = c->status[i].predictor;
             }
diff --git a/libavcodec/cavs.c b/libavcodec/cavs.c
index ee862bbc7b..4672635d7c 100644
--- a/libavcodec/cavs.c
+++ b/libavcodec/cavs.c
@@ -128,9 +128,9 @@ static inline int get_bs(vector_t *mvP, vector_t *mvQ, int b) {
 }
 
 #define SET_PARAMS                                            \
-    alpha = alpha_tab[clip(qp_avg + h->alpha_offset,0,63)];   \
-    beta  =  beta_tab[clip(qp_avg + h->beta_offset, 0,63)];   \
-    tc    =    tc_tab[clip(qp_avg + h->alpha_offset,0,63)];
+    alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset,0,63)];   \
+    beta  =  beta_tab[av_clip(qp_avg + h->beta_offset, 0,63)];   \
+    tc    =    tc_tab[av_clip(qp_avg + h->alpha_offset,0,63)];
 
 /**
  * in-loop deblocking filter for a single macroblock
diff --git a/libavcodec/cavsdsp.c b/libavcodec/cavsdsp.c
index 220dec1b85..55ecaae0a0 100644
--- a/libavcodec/cavsdsp.c
+++ b/libavcodec/cavsdsp.c
@@ -63,16 +63,16 @@ static inline void loop_filter_l1(uint8_t *p0_p, int stride, int alpha, int beta
     int q0 = Q0;
 
     if(abs(p0-q0)<alpha && abs(P1-p0)<beta && abs(Q1-q0)<beta) {
-        int delta = clip(((q0-p0)*3+P1-Q1+4)>>3,-tc, tc);
-        P0 = clip_uint8(p0+delta);
-        Q0 = clip_uint8(q0-delta);
+        int delta = av_clip(((q0-p0)*3+P1-Q1+4)>>3,-tc, tc);
+        P0 = av_clip_uint8(p0+delta);
+        Q0 = av_clip_uint8(q0-delta);
         if(abs(P2-p0)<beta) {
-            delta = clip(((P0-P1)*3+P2-Q0+4)>>3, -tc, tc);
-            P1 = clip_uint8(P1+delta);
+            delta = av_clip(((P0-P1)*3+P2-Q0+4)>>3, -tc, tc);
+            P1 = av_clip_uint8(P1+delta);
         }
         if(abs(Q2-q0)<beta) {
-            delta = clip(((Q1-Q0)*3+P0-Q2+4)>>3, -tc, tc);
-            Q1 = clip_uint8(Q1-delta);
+            delta = av_clip(((Q1-Q0)*3+P0-Q2+4)>>3, -tc, tc);
+            Q1 = av_clip_uint8(Q1-delta);
         }
     }
 }
@@ -98,9 +98,9 @@ static inline void loop_filter_c2(uint8_t *p0_p,int stride,int alpha, int beta)
 static inline void loop_filter_c1(uint8_t *p0_p,int stride,int alpha, int beta,
                                   int tc) {
     if(abs(P0-Q0)<alpha && abs(P1-P0)<beta && abs(Q1-Q0)<beta) {
-        int delta = clip(((Q0-P0)*3+P1-Q1+4)>>3, -tc, tc);
-        P0 = clip_uint8(P0+delta);
-        Q0 = clip_uint8(Q0-delta);
+        int delta = av_clip(((Q0-P0)*3+P1-Q1+4)>>3, -tc, tc);
+        P0 = av_clip_uint8(P0+delta);
+        Q0 = av_clip_uint8(Q0-delta);
     }
 }
 
diff --git a/libavcodec/cook.c b/libavcodec/cook.c
index edfe513328..9a3221414a 100644
--- a/libavcodec/cook.c
+++ b/libavcodec/cook.c
@@ -998,7 +998,7 @@ mlt_compensate_output(COOKContext *q, float *decode_buffer,
      */
     for (j = 0; j < q->samples_per_channel; j++) {
         out[chan + q->nb_channels * j] =
-          clip(lrintf(q->mono_mdct_output[j]), -32768, 32767);
+          av_clip(lrintf(q->mono_mdct_output[j]), -32768, 32767);
     }
 }
 
diff --git a/libavcodec/dsicinav.c b/libavcodec/dsicinav.c
index dd256e5dc5..c7c3f56273 100644
--- a/libavcodec/dsicinav.c
+++ b/libavcodec/dsicinav.c
@@ -327,7 +327,7 @@ static int cinaudio_decode_frame(AVCodecContext *avctx,
     }
     while (buf_size > 0) {
         cin->delta += cinaudio_delta16_table[*src++];
-        cin->delta = clip(cin->delta, -32768, 32767);
+        cin->delta = av_clip(cin->delta, -32768, 32767);
         *samples++ = cin->delta;
         --buf_size;
     }
diff --git a/libavcodec/dsputil.c b/libavcodec/dsputil.c
index 916d8658cd..eda493d20c 100644
--- a/libavcodec/dsputil.c
+++ b/libavcodec/dsputil.c
@@ -1178,19 +1178,19 @@ void ff_gmc_c(uint8_t *dst, uint8_t *src, int stride, int h, int ox, int oy,
                                            + src[index+stride+1]*   frac_x )*   frac_y
                                         + r)>>(shift*2);
                 }else{
-                    index= src_x + clip(src_y, 0, height)*stride;
+                    index= src_x + av_clip(src_y, 0, height)*stride;
                     dst[y*stride + x]= ( (  src[index         ]*(s-frac_x)
                                           + src[index       +1]*   frac_x )*s
                                         + r)>>(shift*2);
                 }
             }else{
                 if((unsigned)src_y < height){
-                    index= clip(src_x, 0, width) + src_y*stride;
+                    index= av_clip(src_x, 0, width) + src_y*stride;
                     dst[y*stride + x]= (  (  src[index         ]*(s-frac_y)
                                            + src[index+stride  ]*   frac_y )*s
                                         + r)>>(shift*2);
                 }else{
-                    index= clip(src_x, 0, width) + clip(src_y, 0, height)*stride;
+                    index= av_clip(src_x, 0, width) + av_clip(src_y, 0, height)*stride;
                     dst[y*stride + x]=    src[index         ];
                 }
             }
@@ -2434,8 +2434,8 @@ H264_MC(avg_, 16)
 #undef op2_put
 #endif
 
-#define op_scale1(x)  block[x] = clip_uint8( (block[x]*weight + offset) >> log2_denom )
-#define op_scale2(x)  dst[x] = clip_uint8( (src[x]*weights + dst[x]*weightd + offset) >> (log2_denom+1))
+#define op_scale1(x)  block[x] = av_clip_uint8( (block[x]*weight + offset) >> log2_denom )
+#define op_scale2(x)  dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + offset) >> (log2_denom+1))
 #define H264_WEIGHT(W,H) \
 static void weight_h264_pixels ## W ## x ## H ## _c(uint8_t *block, int stride, int log2_denom, int weight, int offset){ \
     int y; \
@@ -2659,7 +2659,7 @@ static void h263_v_loop_filter_c(uint8_t *src, int stride, int qscale){
 
         ad1= FFABS(d1)>>1;
 
-        d2= clip((p0-p3)/4, -ad1, ad1);
+        d2= av_clip((p0-p3)/4, -ad1, ad1);
 
         src[x-2*stride] = p0 - d2;
         src[x+  stride] = p3 + d2;
@@ -2694,7 +2694,7 @@ static void h263_h_loop_filter_c(uint8_t *src, int stride, int qscale){
 
         ad1= FFABS(d1)>>1;
 
-        d2= clip((p0-p3)/4, -ad1, ad1);
+        d2= av_clip((p0-p3)/4, -ad1, ad1);
 
         src[y*stride-2] = p0 - d2;
         src[y*stride+1] = p3 + d2;
@@ -2752,17 +2752,17 @@ static inline void h264_loop_filter_luma_c(uint8_t *pix, int xstride, int ystrid
                 int i_delta;
 
                 if( FFABS( p2 - p0 ) < beta ) {
-                    pix[-2*xstride] = p1 + clip( (( p2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - p1, -tc0[i], tc0[i] );
+                    pix[-2*xstride] = p1 + av_clip( (( p2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - p1, -tc0[i], tc0[i] );
                     tc++;
                 }
                 if( FFABS( q2 - q0 ) < beta ) {
-                    pix[   xstride] = q1 + clip( (( q2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - q1, -tc0[i], tc0[i] );
+                    pix[   xstride] = q1 + av_clip( (( q2 + ( ( p0 + q0 + 1 ) >> 1 ) ) >> 1) - q1, -tc0[i], tc0[i] );
                     tc++;
                 }
 
-                i_delta = clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
-                pix[-xstride] = clip_uint8( p0 + i_delta );    /* p0' */
-                pix[0]        = clip_uint8( q0 - i_delta );    /* q0' */
+                i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
+                pix[-xstride] = av_clip_uint8( p0 + i_delta );    /* p0' */
+                pix[0]        = av_clip_uint8( q0 - i_delta );    /* q0' */
             }
             pix += ystride;
         }
@@ -2796,10 +2796,10 @@ static inline void h264_loop_filter_chroma_c(uint8_t *pix, int xstride, int ystr
                 FFABS( p1 - p0 ) < beta &&
                 FFABS( q1 - q0 ) < beta ) {
 
-                int delta = clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
+                int delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
 
-                pix[-xstride] = clip_uint8( p0 + delta );    /* p0' */
-                pix[0]        = clip_uint8( q0 - delta );    /* q0' */
+                pix[-xstride] = av_clip_uint8( p0 + delta );    /* p0' */
+                pix[0]        = av_clip_uint8( q0 - delta );    /* q0' */
             }
             pix += ystride;
         }
diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index 2e15df3d2f..175ccf73ad 100644
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@@ -612,8 +612,8 @@ void ff_er_frame_start(MpegEncContext *s){
  *               error of the same type occured
  */
 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status){
-    const int start_i= clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
-    const int end_i  = clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
+    const int start_i= av_clip(startx + starty * s->mb_width    , 0, s->mb_num-1);
+    const int end_i  = av_clip(endx   + endy   * s->mb_width    , 0, s->mb_num);
     const int start_xy= s->mb_index2xy[start_i];
     const int end_xy  = s->mb_index2xy[end_i];
     int mask= -1;
diff --git a/libavcodec/eval.c b/libavcodec/eval.c
index 6ec7069914..877de35529 100644
--- a/libavcodec/eval.c
+++ b/libavcodec/eval.c
@@ -155,7 +155,7 @@ static double eval_expr(Parser * p, AVEvalExpr * e) {
         case e_func2:  return e->value * e->a.func2(p->opaque, eval_expr(p, e->param[0]), eval_expr(p, e->param[1]));
         case e_squish: return 1/(1+exp(4*eval_expr(p, e->param[0])));
         case e_gauss: { double d = eval_expr(p, e->param[0]); return exp(-d*d/2)/sqrt(2*M_PI); }
-        case e_ld:     return e->value * p->var[clip(eval_expr(p, e->param[0]), 0, VARS-1)];
+        case e_ld:     return e->value * p->var[av_clip(eval_expr(p, e->param[0]), 0, VARS-1)];
         case e_while: {
             double d = NAN;
             while(eval_expr(p, e->param[0]))
@@ -177,7 +177,7 @@ static double eval_expr(Parser * p, AVEvalExpr * e) {
                 case e_div: return e->value * (d / d2);
                 case e_add: return e->value * (d + d2);
                 case e_last:return e->value * d2;
-                case e_st : return e->value * (p->var[clip(d, 0, VARS-1)]= d2);
+                case e_st : return e->value * (p->var[av_clip(d, 0, VARS-1)]= d2);
             }
         }
     }
diff --git a/libavcodec/flacenc.c b/libavcodec/flacenc.c
index b7b7d0d8e6..9dd6c7eb87 100644
--- a/libavcodec/flacenc.c
+++ b/libavcodec/flacenc.c
@@ -244,7 +244,7 @@ static int flac_encode_init(AVCodecContext *avctx)
 
     /* set compression option overrides from AVCodecContext */
     if(avctx->use_lpc >= 0) {
-        s->options.use_lpc = clip(avctx->use_lpc, 0, 11);
+        s->options.use_lpc = av_clip(avctx->use_lpc, 0, 11);
     }
     if(s->options.use_lpc == 1)
         av_log(avctx, AV_LOG_DEBUG, " use lpc: Levinson-Durbin recursion with Welch window\n");
@@ -712,7 +712,7 @@ static void quantize_lpc_coefs(double *lpc_in, int order, int precision,
     error=0;
     for(i=0; i<order; i++) {
         error += lpc_in[i] * (1 << sh);
-        lpc_out[i] = clip(lrintf(error), -qmax, qmax);
+        lpc_out[i] = av_clip(lrintf(error), -qmax, qmax);
         error -= lpc_out[i];
     }
     *shift = sh;
diff --git a/libavcodec/g726.c b/libavcodec/g726.c
index 11417442a2..07af331226 100644
--- a/libavcodec/g726.c
+++ b/libavcodec/g726.c
@@ -213,12 +213,12 @@ static inline int16_t g726_iterate(G726Context* c, int16_t I)
             c->b[i] = 0;
     } else {
         /* This is a bit crazy, but it really is +255 not +256 */
-        fa1 = clip((-c->a[0]*c->pk[0]*pk0)>>5, -256, 255);
+        fa1 = av_clip((-c->a[0]*c->pk[0]*pk0)>>5, -256, 255);
 
         c->a[1] += 128*pk0*c->pk[1] + fa1 - (c->a[1]>>7);
-        c->a[1] = clip(c->a[1], -12288, 12288);
+        c->a[1] = av_clip(c->a[1], -12288, 12288);
         c->a[0] += 64*3*pk0*c->pk[0] - (c->a[0] >> 8);
-        c->a[0] = clip(c->a[0], -(15360 - c->a[1]), 15360 - c->a[1]);
+        c->a[0] = av_clip(c->a[0], -(15360 - c->a[1]), 15360 - c->a[1]);
 
         for (i=0; i<6; i++)
             c->b[i] += 128*dq0*sgn(-c->dq[i].sign) - (c->b[i]>>8);
@@ -248,7 +248,7 @@ static inline int16_t g726_iterate(G726Context* c, int16_t I)
         c->ap += (0x200 - c->ap) >> 4;
 
     /* Update Yu and Yl */
-    c->yu = clip(c->y + (((c->tbls->W[I] << 5) - c->y) >> 5), 544, 5120);
+    c->yu = av_clip(c->y + (((c->tbls->W[I] << 5) - c->y) >> 5), 544, 5120);
     c->yl += c->yu + ((-c->yl)>>6);
 
     /* Next iteration for Y */
@@ -264,7 +264,7 @@ static inline int16_t g726_iterate(G726Context* c, int16_t I)
         c->se += mult(i2f(c->a[i] >> 2, &f), &c->sr[i]);
     c->se >>= 1;
 
-    return clip(re_signal << 2, -0xffff, 0xffff);
+    return av_clip(re_signal << 2, -0xffff, 0xffff);
 }
 
 static int g726_reset(G726Context* c, int bit_rate)
diff --git a/libavcodec/h263.c b/libavcodec/h263.c
index 31cc583915..8ae228e4ab 100644
--- a/libavcodec/h263.c
+++ b/libavcodec/h263.c
@@ -211,7 +211,7 @@ void h263_encode_picture_header(MpegEncContext * s, int picture_number)
         for(i=0; i<2; i++){
             int div, error;
             div= (s->avctx->time_base.num*1800000LL + 500LL*s->avctx->time_base.den) / ((1000LL+i)*s->avctx->time_base.den);
-            div= clip(1, div, 127);
+            div= av_clip(1, div, 127);
             error= FFABS(s->avctx->time_base.num*1800000LL - (1000LL+i)*s->avctx->time_base.den*div);
             if(error < best_error){
                 best_error= error;
@@ -496,7 +496,7 @@ static void ff_init_qscale_tab(MpegEncContext *s){
     for(i=0; i<s->mb_num; i++){
         unsigned int lam= s->lambda_table[ s->mb_index2xy[i] ];
         int qp= (lam*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
-        qscale_table[ s->mb_index2xy[i] ]= clip(qp, s->avctx->qmin, s->avctx->qmax);
+        qscale_table[ s->mb_index2xy[i] ]= av_clip(qp, s->avctx->qmin, s->avctx->qmax);
     }
 }
 
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 7d6087b30f..7d5a93db4b 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -1322,13 +1322,13 @@ static inline void direct_dist_scale_factor(H264Context * const h){
     int i;
     for(i=0; i<h->ref_count[0]; i++){
         int poc0 = h->ref_list[0][i].poc;
-        int td = clip(poc1 - poc0, -128, 127);
+        int td = av_clip(poc1 - poc0, -128, 127);
         if(td == 0 /* FIXME || pic0 is a long-term ref */){
             h->dist_scale_factor[i] = 256;
         }else{
-            int tb = clip(poc - poc0, -128, 127);
+            int tb = av_clip(poc - poc0, -128, 127);
             int tx = (16384 + (FFABS(td) >> 1)) / td;
-            h->dist_scale_factor[i] = clip((tb*tx + 32) >> 6, -1024, 1023);
+            h->dist_scale_factor[i] = av_clip((tb*tx + 32) >> 6, -1024, 1023);
         }
     }
     if(FRAME_MBAFF){
@@ -1948,7 +1948,7 @@ static void chroma_dc_dct_c(DCTELEM *block){
  */
 static inline int get_chroma_qp(int chroma_qp_index_offset, int qscale){
 
-    return chroma_qp[clip(qscale + chroma_qp_index_offset, 0, 51)];
+    return chroma_qp[av_clip(qscale + chroma_qp_index_offset, 0, 51)];
 }
 
 //FIXME need to check that this doesnt overflow signed 32 bit for low qp, i am not sure, it's very close
@@ -4122,11 +4122,11 @@ static void implicit_weight_table(H264Context *h){
         int poc0 = h->ref_list[0][ref0].poc;
         for(ref1=0; ref1 < h->ref_count[1]; ref1++){
             int poc1 = h->ref_list[1][ref1].poc;
-            int td = clip(poc1 - poc0, -128, 127);
+            int td = av_clip(poc1 - poc0, -128, 127);
             if(td){
-                int tb = clip(cur_poc - poc0, -128, 127);
+                int tb = av_clip(cur_poc - poc0, -128, 127);
                 int tx = (16384 + (FFABS(td) >> 1)) / td;
-                int dist_scale_factor = clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
+                int dist_scale_factor = av_clip((tb*tx + 32) >> 6, -1024, 1023) >> 2;
                 if(dist_scale_factor < -64 || dist_scale_factor > 128)
                     h->implicit_weight[ref0][ref1] = 32;
                 else
@@ -6814,17 +6814,17 @@ static void filter_mb_mbaff_edgev( H264Context *h, uint8_t *pix, int stride, int
                 int i_delta;
 
                 if( FFABS( p2 - p0 ) < beta ) {
-                    pix[-2] = p1 + clip( ( p2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( p1 << 1 ) ) >> 1, -tc0, tc0 );
+                    pix[-2] = p1 + av_clip( ( p2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( p1 << 1 ) ) >> 1, -tc0, tc0 );
                     tc++;
                 }
                 if( FFABS( q2 - q0 ) < beta ) {
-                    pix[1] = q1 + clip( ( q2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( q1 << 1 ) ) >> 1, -tc0, tc0 );
+                    pix[1] = q1 + av_clip( ( q2 + ( ( p0 + q0 + 1 ) >> 1 ) - ( q1 << 1 ) ) >> 1, -tc0, tc0 );
                     tc++;
                 }
 
-                i_delta = clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
-                pix[-1] = clip_uint8( p0 + i_delta );    /* p0' */
-                pix[0]  = clip_uint8( q0 - i_delta );    /* q0' */
+                i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
+                pix[-1] = av_clip_uint8( p0 + i_delta );    /* p0' */
+                pix[0]  = av_clip_uint8( q0 - i_delta );    /* q0' */
                 tprintf("filter_mb_mbaff_edgev i:%d, qp:%d, indexA:%d, alpha:%d, beta:%d, tc:%d\n# bS:%d -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x]\n", i, qp[qp_index], index_a, alpha, beta, tc, bS[bS_index], pix[-3], p1, p0, q0, q1, pix[2], p1, pix[-1], pix[0], q1);
             }
         }else{
@@ -6902,10 +6902,10 @@ static void filter_mb_mbaff_edgecv( H264Context *h, uint8_t *pix, int stride, in
             if( FFABS( p0 - q0 ) < alpha &&
                 FFABS( p1 - p0 ) < beta &&
                 FFABS( q1 - q0 ) < beta ) {
-                const int i_delta = clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
+                const int i_delta = av_clip( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
 
-                pix[-1] = clip_uint8( p0 + i_delta );    /* p0' */
-                pix[0]  = clip_uint8( q0 - i_delta );    /* q0' */
+                pix[-1] = av_clip_uint8( p0 + i_delta );    /* p0' */
+                pix[0]  = av_clip_uint8( q0 - i_delta );    /* q0' */
                 tprintf("filter_mb_mbaff_edgecv i:%d, qp:%d, indexA:%d, alpha:%d, beta:%d, tc:%d\n# bS:%d -> [%02x, %02x, %02x, %02x, %02x, %02x] =>[%02x, %02x, %02x, %02x]\n", i, qp[qp_index], index_a, alpha, beta, tc, bS[bS_index], pix[-3], p1, p0, q0, q1, pix[2], p1, pix[-1], pix[0], q1);
             }
         }else{
@@ -7387,9 +7387,9 @@ static int decode_slice(H264Context *h){
         for( i= 0; i < 460; i++ ) {
             int pre;
             if( h->slice_type == I_TYPE )
-                pre = clip( ((cabac_context_init_I[i][0] * s->qscale) >>4 ) + cabac_context_init_I[i][1], 1, 126 );
+                pre = av_clip( ((cabac_context_init_I[i][0] * s->qscale) >>4 ) + cabac_context_init_I[i][1], 1, 126 );
             else
-                pre = clip( ((cabac_context_init_PB[h->cabac_init_idc][i][0] * s->qscale) >>4 ) + cabac_context_init_PB[h->cabac_init_idc][i][1], 1, 126 );
+                pre = av_clip( ((cabac_context_init_PB[h->cabac_init_idc][i][0] * s->qscale) >>4 ) + cabac_context_init_PB[h->cabac_init_idc][i][1], 1, 126 );
 
             if( pre <= 63 )
                 h->cabac_state[i] = 2 * ( 63 - pre ) + 0;
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index 7360b64096..6140130b1c 100644
--- a/libavcodec/imc.c
+++ b/libavcodec/imc.c
@@ -347,7 +347,7 @@ static int bit_allocation (IMCContext* q, int stream_format_code, int freebits,
         iacc = 0;
 
         for(j = (stream_format_code & 0x2)?4:0; j < BANDS; j++) {
-            cwlen = clip((int)((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
+            cwlen = av_clip((int)((q->flcoeffs4[j] * 0.5) - summa + 0.5), 0, 6);
 
             q->bitsBandT[j] = cwlen;
             summer += q->bandWidthT[j] * cwlen;
diff --git a/libavcodec/indeo2.c b/libavcodec/indeo2.c
index f3917ff3aa..2b129d1418 100644
--- a/libavcodec/indeo2.c
+++ b/libavcodec/indeo2.c
@@ -87,11 +87,11 @@ static int ir2_decode_plane(Ir2Context *ctx, int width, int height, uint8_t *dst
                 }
             } else { /* add two deltas from table */
                 t = dst[out - stride] + (table[c * 2] - 128);
-                t= clip_uint8(t);
+                t= av_clip_uint8(t);
                 dst[out] = t;
                 out++;
                 t = dst[out - stride] + (table[(c * 2) + 1] - 128);
-                t= clip_uint8(t);
+                t= av_clip_uint8(t);
                 dst[out] = t;
                 out++;
             }
@@ -121,11 +121,11 @@ static int ir2_decode_plane_inter(Ir2Context *ctx, int width, int height, uint8_
                 out += c * 2;
             } else { /* add two deltas from table */
                 t = dst[out] + (((table[c * 2] - 128)*3) >> 2);
-                t= clip_uint8(t);
+                t= av_clip_uint8(t);
                 dst[out] = t;
                 out++;
                 t = dst[out] + (((table[(c * 2) + 1] - 128)*3) >> 2);
-                t= clip_uint8(t);
+                t= av_clip_uint8(t);
                 dst[out] = t;
                 out++;
             }
diff --git a/libavcodec/jpeg_ls.c b/libavcodec/jpeg_ls.c
index 67f0d0f5ab..136e3fb809 100644
--- a/libavcodec/jpeg_ls.c
+++ b/libavcodec/jpeg_ls.c
@@ -366,10 +366,10 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
             }
 
             if(sign){
-                pred = clip(pred - state->C[context], 0, state->maxval);
+                pred = av_clip(pred - state->C[context], 0, state->maxval);
                 err = -ls_get_code_regular(&s->gb, state, context);
             } else {
-                pred = clip(pred + state->C[context], 0, state->maxval);
+                pred = av_clip(pred + state->C[context], 0, state->maxval);
                 err = ls_get_code_regular(&s->gb, state, context);
             }
 
@@ -381,7 +381,7 @@ static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *
                 pred += state->range * state->twonear;
             else if(pred > state->maxval + state->near)
                 pred -= state->range * state->twonear;
-            pred = clip(pred, 0, state->maxval);
+            pred = av_clip(pred, 0, state->maxval);
         }
 
         pred &= state->maxval;
@@ -623,9 +623,9 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
                     err = -(state->near - err) / state->twonear;
 
                 if(RItype || (Rb >= Ra))
-                    Ra = clip(pred + err * state->twonear, 0, state->maxval);
+                    Ra = av_clip(pred + err * state->twonear, 0, state->maxval);
                 else
-                    Ra = clip(pred - err * state->twonear, 0, state->maxval);
+                    Ra = av_clip(pred - err * state->twonear, 0, state->maxval);
                 W(cur, x, Ra);
             }
             if(err < 0)
@@ -646,11 +646,11 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
             if(context < 0){
                 context = -context;
                 sign = 1;
-                pred = clip(pred - state->C[context], 0, state->maxval);
+                pred = av_clip(pred - state->C[context], 0, state->maxval);
                 err = pred - R(cur, x);
             }else{
                 sign = 0;
-                pred = clip(pred + state->C[context], 0, state->maxval);
+                pred = av_clip(pred + state->C[context], 0, state->maxval);
                 err = R(cur, x) - pred;
             }
 
@@ -660,9 +660,9 @@ static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last
                 else
                     err = -(state->near - err) / state->twonear;
                 if(!sign)
-                    Ra = clip(pred + err * state->twonear, 0, state->maxval);
+                    Ra = av_clip(pred + err * state->twonear, 0, state->maxval);
                 else
-                    Ra = clip(pred - err * state->twonear, 0, state->maxval);
+                    Ra = av_clip(pred - err * state->twonear, 0, state->maxval);
                 W(cur, x, Ra);
             }
 
diff --git a/libavcodec/motion_est.c b/libavcodec/motion_est.c
index f9c0d0a601..2e8b1d34bc 100644
--- a/libavcodec/motion_est.c
+++ b/libavcodec/motion_est.c
@@ -1798,15 +1798,15 @@ static inline int direct_search(MpegEncContext * s, int mb_x, int mb_y)
     c->pred_x=0;
     c->pred_y=0;
 
-    P_LEFT[0]        = clip(mv_table[mot_xy - 1][0], xmin<<shift, xmax<<shift);
-    P_LEFT[1]        = clip(mv_table[mot_xy - 1][1], ymin<<shift, ymax<<shift);
+    P_LEFT[0]        = av_clip(mv_table[mot_xy - 1][0], xmin<<shift, xmax<<shift);
+    P_LEFT[1]        = av_clip(mv_table[mot_xy - 1][1], ymin<<shift, ymax<<shift);
 
     /* special case for first line */
     if (!s->first_slice_line) { //FIXME maybe allow this over thread boundary as its clipped
-        P_TOP[0]      = clip(mv_table[mot_xy - mot_stride             ][0], xmin<<shift, xmax<<shift);
-        P_TOP[1]      = clip(mv_table[mot_xy - mot_stride             ][1], ymin<<shift, ymax<<shift);
-        P_TOPRIGHT[0] = clip(mv_table[mot_xy - mot_stride + 1         ][0], xmin<<shift, xmax<<shift);
-        P_TOPRIGHT[1] = clip(mv_table[mot_xy - mot_stride + 1         ][1], ymin<<shift, ymax<<shift);
+        P_TOP[0]      = av_clip(mv_table[mot_xy - mot_stride             ][0], xmin<<shift, xmax<<shift);
+        P_TOP[1]      = av_clip(mv_table[mot_xy - mot_stride             ][1], ymin<<shift, ymax<<shift);
+        P_TOPRIGHT[0] = av_clip(mv_table[mot_xy - mot_stride + 1         ][0], xmin<<shift, xmax<<shift);
+        P_TOPRIGHT[1] = av_clip(mv_table[mot_xy - mot_stride + 1         ][1], ymin<<shift, ymax<<shift);
 
         P_MEDIAN[0]= mid_pred(P_LEFT[0], P_TOP[0], P_TOPRIGHT[0]);
         P_MEDIAN[1]= mid_pred(P_LEFT[1], P_TOP[1], P_TOPRIGHT[1]);
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index 7a1b53c016..493827ec91 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -188,7 +188,7 @@ static void convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[
 
 static inline void update_qscale(MpegEncContext *s){
     s->qscale= (s->lambda*139 + FF_LAMBDA_SCALE*64) >> (FF_LAMBDA_SHIFT + 7);
-    s->qscale= clip(s->qscale, s->avctx->qmin, s->avctx->qmax);
+    s->qscale= av_clip(s->qscale, s->avctx->qmin, s->avctx->qmax);
 
     s->lambda2= (s->lambda*s->lambda + FF_LAMBDA_SCALE/2) >> FF_LAMBDA_SHIFT;
 }
@@ -1713,10 +1713,10 @@ void MPV_frame_end(MpegEncContext *s)
 static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color){
     int x, y, fr, f;
 
-    sx= clip(sx, 0, w-1);
-    sy= clip(sy, 0, h-1);
-    ex= clip(ex, 0, w-1);
-    ey= clip(ey, 0, h-1);
+    sx= av_clip(sx, 0, w-1);
+    sy= av_clip(sy, 0, h-1);
+    ex= av_clip(ex, 0, w-1);
+    ey= av_clip(ey, 0, h-1);
 
     buf[sy*stride + sx]+= color;
 
@@ -1762,10 +1762,10 @@ static void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h
 static void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int w, int h, int stride, int color){
     int dx,dy;
 
-    sx= clip(sx, -100, w+100);
-    sy= clip(sy, -100, h+100);
-    ex= clip(ex, -100, w+100);
-    ey= clip(ey, -100, h+100);
+    sx= av_clip(sx, -100, w+100);
+    sy= av_clip(sy, -100, h+100);
+    ex= av_clip(ex, -100, w+100);
+    ey= av_clip(ey, -100, h+100);
 
     dx= ex - sx;
     dy= ey - sy;
@@ -2664,10 +2664,10 @@ static inline void gmc1_motion(MpegEncContext *s,
     src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy+1));
     motion_x<<=(3-s->sprite_warping_accuracy);
     motion_y<<=(3-s->sprite_warping_accuracy);
-    src_x = clip(src_x, -16, s->width);
+    src_x = av_clip(src_x, -16, s->width);
     if (src_x == s->width)
         motion_x =0;
-    src_y = clip(src_y, -16, s->height);
+    src_y = av_clip(src_y, -16, s->height);
     if (src_y == s->height)
         motion_y =0;
 
@@ -2706,10 +2706,10 @@ static inline void gmc1_motion(MpegEncContext *s,
     src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy+1));
     motion_x<<=(3-s->sprite_warping_accuracy);
     motion_y<<=(3-s->sprite_warping_accuracy);
-    src_x = clip(src_x, -8, s->width>>1);
+    src_x = av_clip(src_x, -8, s->width>>1);
     if (src_x == s->width>>1)
         motion_x =0;
-    src_y = clip(src_y, -8, s->height>>1);
+    src_y = av_clip(src_y, -8, s->height>>1);
     if (src_y == s->height>>1)
         motion_y =0;
 
@@ -2879,10 +2879,10 @@ static inline int hpel_motion(MpegEncContext *s,
     src_y += motion_y >> 1;
 
     /* WARNING: do no forget half pels */
-    src_x = clip(src_x, -16, width); //FIXME unneeded for emu?
+    src_x = av_clip(src_x, -16, width); //FIXME unneeded for emu?
     if (src_x == width)
         dxy &= ~1;
-    src_y = clip(src_y, -16, height);
+    src_y = av_clip(src_y, -16, height);
     if (src_y == height)
         dxy &= ~2;
     src += src_y * stride + src_x;
@@ -3358,10 +3358,10 @@ static inline void chroma_4mv_motion(MpegEncContext *s,
 
     src_x = s->mb_x * 8 + mx;
     src_y = s->mb_y * 8 + my;
-    src_x = clip(src_x, -8, s->width/2);
+    src_x = av_clip(src_x, -8, s->width/2);
     if (src_x == s->width/2)
         dxy &= ~1;
-    src_y = clip(src_y, -8, s->height/2);
+    src_y = av_clip(src_y, -8, s->height/2);
     if (src_y == s->height/2)
         dxy &= ~2;
 
@@ -3574,10 +3574,10 @@ static inline void MPV_motion(MpegEncContext *s,
                 src_y = mb_y * 16 + (motion_y >> 2) + (i >>1) * 8;
 
                 /* WARNING: do no forget half pels */
-                src_x = clip(src_x, -16, s->width);
+                src_x = av_clip(src_x, -16, s->width);
                 if (src_x == s->width)
                     dxy &= ~3;
-                src_y = clip(src_y, -16, s->height);
+                src_y = av_clip(src_y, -16, s->height);
                 if (src_y == s->height)
                     dxy &= ~12;
 
@@ -4343,7 +4343,7 @@ static av_always_inline void encode_mb_internal(MpegEncContext *s, int motion_x,
             s->dquant= s->qscale - last_qp;
 
             if(s->out_format==FMT_H263){
-                s->dquant= clip(s->dquant, -2, 2);
+                s->dquant= av_clip(s->dquant, -2, 2);
 
                 if(s->codec_id==CODEC_ID_MPEG4){
                     if(!s->mb_intra){
@@ -5742,7 +5742,7 @@ static int encode_picture(MpegEncContext *s, int picture_number)
         for(i=1;i<64;i++){
             int j= s->dsp.idct_permutation[i];
 
-            s->intra_matrix[j] = clip_uint8((ff_mpeg1_default_intra_matrix[i] * s->qscale) >> 3);
+            s->intra_matrix[j] = av_clip_uint8((ff_mpeg1_default_intra_matrix[i] * s->qscale) >> 3);
         }
         convert_matrix(&s->dsp, s->q_intra_matrix, s->q_intra_matrix16,
                        s->intra_matrix, s->intra_quant_bias, 8, 8, 1);
diff --git a/libavcodec/ratecontrol.c b/libavcodec/ratecontrol.c
index 9cf63c0cf6..6d9270da88 100644
--- a/libavcodec/ratecontrol.c
+++ b/libavcodec/ratecontrol.c
@@ -280,7 +280,7 @@ int ff_vbv_update(MpegEncContext *s, int frame_size){
         }
 
         left= buffer_size - rcc->buffer_index - 1;
-        rcc->buffer_index += clip(left, min_rate, max_rate);
+        rcc->buffer_index += av_clip(left, min_rate, max_rate);
 
         if(rcc->buffer_index > buffer_size){
             int stuffing= ceil((rcc->buffer_index - buffer_size)/8);
@@ -417,8 +417,8 @@ static void get_qminmax(int *qmin_ret, int *qmax_ret, MpegEncContext *s, int pic
         qmax= (int)(qmax*FFABS(s->avctx->i_quant_factor)+s->avctx->i_quant_offset + 0.5);
     }
 
-    qmin= clip(qmin, 1, FF_LAMBDA_MAX);
-    qmax= clip(qmax, 1, FF_LAMBDA_MAX);
+    qmin= av_clip(qmin, 1, FF_LAMBDA_MAX);
+    qmax= av_clip(qmax, 1, FF_LAMBDA_MAX);
 
     if(qmax<qmin) qmax= qmin;
 
@@ -915,7 +915,7 @@ static int init_pass2(MpegEncContext *s)
     for(i=0; i<rcc->num_entries; i++){
         /* av_log(s->avctx, AV_LOG_DEBUG, "[lavc rc] entry[%d].new_qscale = %.3f  qp = %.3f\n",
             i, rcc->entry[i].new_qscale, rcc->entry[i].new_qscale / FF_QP2LAMBDA); */
-        qscale_sum += clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, s->avctx->qmin, s->avctx->qmax);
+        qscale_sum += av_clip(rcc->entry[i].new_qscale / FF_QP2LAMBDA, s->avctx->qmin, s->avctx->qmax);
     }
     assert(toobig <= 40);
     av_log(s->avctx, AV_LOG_DEBUG,
diff --git a/libavcodec/resample2.c b/libavcodec/resample2.c
index 3ae0ba855c..9cc2edbe8f 100644
--- a/libavcodec/resample2.c
+++ b/libavcodec/resample2.c
@@ -121,7 +121,7 @@ void av_build_filter(FELEM *filter, double factor, int tap_count, int phase_coun
 
         /* normalize so that an uniform color remains the same */
         for(i=0;i<tap_count;i++) {
-            v = clip(lrintf(tab[i] * scale / norm + e), FELEM_MIN, FELEM_MAX);
+            v = av_clip(lrintf(tab[i] * scale / norm + e), FELEM_MIN, FELEM_MAX);
             filter[ph * tap_count + i] = v;
             e += tab[i] * scale / norm - v;
         }
diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index c815e138a8..dc50941fac 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -1810,7 +1810,7 @@ static inline void unpack_coeffs(SnowContext *s, SubBand *b, SubBand * parent, i
 static inline void decode_subband_slice_buffered(SnowContext *s, SubBand *b, slice_buffer * sb, int start_y, int h, int save_state[1]){
     const int w= b->width;
     int y;
-    const int qlog= clip(s->qlog + b->qlog, 0, QROOT*16);
+    const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
     int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
     int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
     int new_index = 0;
@@ -2898,7 +2898,7 @@ static int get_dc(SnowContext *s, int mb_x, int mb_y, int plane_index){
     }
     *b= backup;
 
-    return clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we shouldnt need cliping
+    return av_clip(((ab<<LOG2_OBMC_MAX) + aa/2)/aa, 0, 255); //FIXME we shouldnt need cliping
 }
 
 static inline int get_block_bits(SnowContext *s, int x, int y, int w){
@@ -3407,7 +3407,7 @@ static void quantize(SnowContext *s, SubBand *b, DWTELEM *src, int stride, int b
     const int level= b->level;
     const int w= b->width;
     const int h= b->height;
-    const int qlog= clip(s->qlog + b->qlog, 0, QROOT*16);
+    const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
     const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
     int x,y, thres1, thres2;
 //    START_TIMER
@@ -3466,7 +3466,7 @@ static void quantize(SnowContext *s, SubBand *b, DWTELEM *src, int stride, int b
 
 static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand *b, DWTELEM *src, int stride, int start_y, int end_y){
     const int w= b->width;
-    const int qlog= clip(s->qlog + b->qlog, 0, QROOT*16);
+    const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
     const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
     const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
     int x,y;
@@ -3494,7 +3494,7 @@ static void dequantize_slice_buffered(SnowContext *s, slice_buffer * sb, SubBand
 static void dequantize(SnowContext *s, SubBand *b, DWTELEM *src, int stride){
     const int w= b->width;
     const int h= b->height;
-    const int qlog= clip(s->qlog + b->qlog, 0, QROOT*16);
+    const int qlog= av_clip(s->qlog + b->qlog, 0, QROOT*16);
     const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
     const int qadd= (s->qbias*qmul)>>QBIAS_SHIFT;
     int x,y;
@@ -3869,7 +3869,7 @@ static int ratecontrol_1pass(SnowContext *s, AVFrame *pict)
             const int w= b->width;
             const int h= b->height;
             const int stride= b->stride;
-            const int qlog= clip(2*QROOT + b->qlog, 0, QROOT*16);
+            const int qlog= av_clip(2*QROOT + b->qlog, 0, QROOT*16);
             const int qmul= qexp[qlog&(QROOT-1)]<<(qlog>>QSHIFT);
             const int qdiv= (1<<16)/qmul;
             int x, y;
diff --git a/libavcodec/svq1.c b/libavcodec/svq1.c
index 4a6c5f55c9..55595b7baa 100644
--- a/libavcodec/svq1.c
+++ b/libavcodec/svq1.c
@@ -1004,8 +1004,8 @@ static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *dec
                 diff= block_sum[stage] - sum;
                 mean= (diff + (size>>1)) >> (level+3);
                 assert(mean >-300 && mean<300);
-                if(intra) mean= clip(mean, 0, 255);
-                else      mean= clip(mean, -256, 255);
+                if(intra) mean= av_clip(mean, 0, 255);
+                else      mean= av_clip(mean, -256, 255);
                 score= sqr - ((diff*(int64_t)diff)>>(level+3)); //FIXME 64bit slooow
                 if(score < best_vector_score){
                     best_vector_score= score;
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index e02981e615..db601010bf 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -285,8 +285,8 @@ static inline void svq3_mc_dir_part (MpegEncContext *s,
       emu = 1;
     }
 
-    mx = clip (mx, -16, (s->h_edge_pos - width  + 15));
-    my = clip (my, -16, (s->v_edge_pos - height + 15));
+    mx = av_clip (mx, -16, (s->h_edge_pos - width  + 15));
+    my = av_clip (my, -16, (s->v_edge_pos - height + 15));
   }
 
   /* form component predictions */
@@ -361,8 +361,8 @@ static inline int svq3_mc_dir (H264Context *h, int size, int mode, int dir, int
       }
 
       /* clip motion vector prediction to frame border */
-      mx = clip (mx, extra_width - 6*x, h_edge_pos - 6*x);
-      my = clip (my, extra_width - 6*y, v_edge_pos - 6*y);
+      mx = av_clip (mx, extra_width - 6*x, h_edge_pos - 6*x);
+      my = av_clip (my, extra_width - 6*y, v_edge_pos - 6*y);
 
       /* get (optional) motion vector differential */
       if (mode == PREDICT_MODE) {
diff --git a/libavcodec/truemotion2.c b/libavcodec/truemotion2.c
index e9bc6b7cbe..1596752a90 100644
--- a/libavcodec/truemotion2.c
+++ b/libavcodec/truemotion2.c
@@ -384,7 +384,7 @@ static inline void tm2_apply_deltas(TM2Context *ctx, int* Y, int stride, int *de
             d = deltas[i + j * 4];
             ct += d;
             last[i] += ct;
-            Y[i] = clip_uint8(last[i]);
+            Y[i] = av_clip_uint8(last[i]);
         }
         Y += stride;
         ctx->D[j] = ct;
@@ -735,7 +735,7 @@ static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
     src = (ctx->cur?ctx->Y2:ctx->Y1);
     for(j = 0; j < ctx->avctx->height; j++){
         for(i = 0; i < ctx->avctx->width; i++){
-            Y[i] = clip_uint8(*src++);
+            Y[i] = av_clip_uint8(*src++);
         }
         Y += p->linesize[0];
     }
@@ -743,7 +743,7 @@ static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
     src = (ctx->cur?ctx->U2:ctx->U1);
     for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
         for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
-            U[i] = clip_uint8(*src++);
+            U[i] = av_clip_uint8(*src++);
         }
         U += p->linesize[2];
     }
@@ -751,7 +751,7 @@ static int tm2_decode_blocks(TM2Context *ctx, AVFrame *p)
     src = (ctx->cur?ctx->V2:ctx->V1);
     for(j = 0; j < (ctx->avctx->height + 1) >> 1; j++){
         for(i = 0; i < (ctx->avctx->width + 1) >> 1; i++){
-            V[i] = clip_uint8(*src++);
+            V[i] = av_clip_uint8(*src++);
         }
         V += p->linesize[1];
     }
diff --git a/libavcodec/truespeech.c b/libavcodec/truespeech.c
index d37aa9454a..a03f2a0ced 100644
--- a/libavcodec/truespeech.c
+++ b/libavcodec/truespeech.c
@@ -281,7 +281,7 @@ static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
         for(k = 0; k < 8; k++)
             sum += ptr0[k] * ptr1[k];
         sum = (sum + (out[i] << 12) + 0x800) >> 12;
-        out[i] = clip(sum, -0x7FFE, 0x7FFE);
+        out[i] = av_clip(sum, -0x7FFE, 0x7FFE);
         for(k = 7; k > 0; k--)
             ptr0[k] = ptr0[k - 1];
         ptr0[0] = out[i];
@@ -311,11 +311,11 @@ static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
             sum += ptr0[k] * t[k];
         for(k = 7; k > 0; k--)
             ptr0[k] = ptr0[k - 1];
-        ptr0[0] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
+        ptr0[0] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
 
         sum = ((ptr0[1] * (dec->filtval - (dec->filtval >> 2))) >> 4) + sum;
         sum = sum - (sum >> 3);
-        out[i] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
+        out[i] = av_clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
     }
 }
 
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c
index b2fc5ffcbc..c1a8b4c4d1 100644
--- a/libavcodec/vc1.c
+++ b/libavcodec/vc1.c
@@ -821,10 +821,10 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
 
-    src_x   = clip(  src_x, -16, s->mb_width  * 16);
-    src_y   = clip(  src_y, -16, s->mb_height * 16);
-    uvsrc_x = clip(uvsrc_x,  -8, s->mb_width  *  8);
-    uvsrc_y = clip(uvsrc_y,  -8, s->mb_height *  8);
+    src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
+    src_y   = av_clip(  src_y, -16, s->mb_height * 16);
+    uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
+    uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
 
     srcY += src_y * s->linesize + src_x;
     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
@@ -944,8 +944,8 @@ static void vc1_mc_4mv_luma(VC1Context *v, int n)
     src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);
     src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);
 
-    src_x   = clip(  src_x, -16, s->mb_width  * 16);
-    src_y   = clip(  src_y, -16, s->mb_height * 16);
+    src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
+    src_y   = av_clip(  src_y, -16, s->mb_height * 16);
 
     srcY += src_y * s->linesize + src_x;
 
@@ -1071,8 +1071,8 @@ static void vc1_mc_4mv_chroma(VC1Context *v)
     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
 
-    uvsrc_x = clip(uvsrc_x,  -8, s->mb_width  *  8);
-    uvsrc_y = clip(uvsrc_y,  -8, s->mb_height *  8);
+    uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
+    uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
     srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;
     srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;
     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)
@@ -1499,8 +1499,8 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
                     shift = v->lumshift << 6;
             }
             for(i = 0; i < 256; i++) {
-                v->luty[i] = clip_uint8((scale * i + shift + 32) >> 6);
-                v->lutuv[i] = clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
+                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
+                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
             }
         }
         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)
@@ -1740,8 +1740,8 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
                     shift = v->lumshift << 6;
             }
             for(i = 0; i < 256; i++) {
-                v->luty[i] = clip_uint8((scale * i + shift + 32) >> 6);
-                v->lutuv[i] = clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
+                v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);
+                v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);
             }
             v->use_ic = 1;
         }
@@ -2116,10 +2116,10 @@ static void vc1_interp_mc(VC1Context *v)
     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);
     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);
 
-    src_x   = clip(  src_x, -16, s->mb_width  * 16);
-    src_y   = clip(  src_y, -16, s->mb_height * 16);
-    uvsrc_x = clip(uvsrc_x,  -8, s->mb_width  *  8);
-    uvsrc_y = clip(uvsrc_y,  -8, s->mb_height *  8);
+    src_x   = av_clip(  src_x, -16, s->mb_width  * 16);
+    src_y   = av_clip(  src_y, -16, s->mb_height * 16);
+    uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);
+    uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);
 
     srcY += src_y * s->linesize + src_x;
     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;
diff --git a/libavcodec/vc1dsp.c b/libavcodec/vc1dsp.c
index f19f266d1a..6102c09601 100644
--- a/libavcodec/vc1dsp.c
+++ b/libavcodec/vc1dsp.c
@@ -355,7 +355,7 @@ static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int mode,
     tptr = tmp;
     for(j = 0; j < 11; j++) {
         for(i = 0; i < 8; i++)
-            tptr[i] = clip_uint8(vc1_mspel_filter(src + i, 1, m, r));
+            tptr[i] = av_clip_uint8(vc1_mspel_filter(src + i, 1, m, r));
         src += stride;
         tptr += 8;
     }
@@ -365,7 +365,7 @@ static void vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int mode,
     tptr = tmp + 8;
     for(j = 0; j < 8; j++) {
         for(i = 0; i < 8; i++)
-            dst[i] = clip_uint8(vc1_mspel_filter(tptr + i, 8, m, r));
+            dst[i] = av_clip_uint8(vc1_mspel_filter(tptr + i, 8, m, r));
         dst += stride;
         tptr += 8;
     }
diff --git a/libavcodec/vmdav.c b/libavcodec/vmdav.c
index e0f958cbeb..69e8a44d3c 100644
--- a/libavcodec/vmdav.c
+++ b/libavcodec/vmdav.c
@@ -462,7 +462,7 @@ static void vmdaudio_decode_audio(VmdAudioContext *s, unsigned char *data,
             s->predictors[chan] -= vmdaudio_table[buf[i] & 0x7F];
         else
             s->predictors[chan] += vmdaudio_table[buf[i]];
-        s->predictors[chan] = clip(s->predictors[chan], -32768, 32767);
+        s->predictors[chan] = av_clip(s->predictors[chan], -32768, 32767);
         out[i] = s->predictors[chan];
         chan ^= stereo;
     }
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 94d5cd62ff..23d97bf9cc 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -633,7 +633,7 @@ static void init_dequantizer(Vp3DecodeContext *s)
                 int qmin= 8<<(inter + !i);
                 int qscale= i ? ac_scale_factor : dc_scale_factor;
 
-                s->qmat[inter][plane][i]= clip((qscale * coeff)/100 * 4, qmin, 4096);
+                s->qmat[inter][plane][i]= av_clip((qscale * coeff)/100 * 4, qmin, 4096);
             }
         }
     }
@@ -1729,8 +1729,8 @@ static void horizontal_filter(unsigned char *first_pixel, int stride,
             (first_pixel[-2] - first_pixel[ 1])
          +3*(first_pixel[ 0] - first_pixel[-1]);
         filter_value = bounding_values[(filter_value + 4) >> 3];
-        first_pixel[-1] = clip_uint8(first_pixel[-1] + filter_value);
-        first_pixel[ 0] = clip_uint8(first_pixel[ 0] - filter_value);
+        first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
+        first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
     }
 }
 
@@ -1746,8 +1746,8 @@ static void vertical_filter(unsigned char *first_pixel, int stride,
             (first_pixel[2 * nstride] - first_pixel[ stride])
          +3*(first_pixel[0          ] - first_pixel[nstride]);
         filter_value = bounding_values[(filter_value + 4) >> 3];
-        first_pixel[nstride] = clip_uint8(first_pixel[nstride] + filter_value);
-        first_pixel[0] = clip_uint8(first_pixel[0] - filter_value);
+        first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
+        first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value);
     }
 }
 
diff --git a/libavcodec/vp5.c b/libavcodec/vp5.c
index ac953c7aa3..2edacc4cac 100644
--- a/libavcodec/vp5.c
+++ b/libavcodec/vp5.c
@@ -164,7 +164,7 @@ static void vp5_parse_coeff_models(vp56_context_t *s)
     for (pt=0; pt<2; pt++)
         for (ctx=0; ctx<36; ctx++)
             for (node=0; node<5; node++)
-                s->coeff_model_dcct[pt][ctx][node] = clip(((s->coeff_model_dccv[pt][node] * vp5_dccv_lc[node][ctx][0] + 128) >> 8) + vp5_dccv_lc[node][ctx][1], 1, 254);
+                s->coeff_model_dcct[pt][ctx][node] = av_clip(((s->coeff_model_dccv[pt][node] * vp5_dccv_lc[node][ctx][0] + 128) >> 8) + vp5_dccv_lc[node][ctx][1], 1, 254);
 
     /* coeff_model_acct is a linear combination of coeff_model_ract */
     for (ct=0; ct<3; ct++)
@@ -172,7 +172,7 @@ static void vp5_parse_coeff_models(vp56_context_t *s)
             for (cg=0; cg<3; cg++)
                 for (ctx=0; ctx<6; ctx++)
                     for (node=0; node<5; node++)
-                        s->coeff_model_acct[pt][ct][cg][ctx][node] = clip(((s->coeff_model_ract[pt][ct][cg][node] * vp5_ract_lc[ct][cg][node][ctx][0] + 128) >> 8) + vp5_ract_lc[ct][cg][node][ctx][1], 1, 254);
+                        s->coeff_model_acct[pt][ct][cg][ctx][node] = av_clip(((s->coeff_model_ract[pt][ct][cg][node] * vp5_ract_lc[ct][cg][node][ctx][0] + 128) >> 8) + vp5_ract_lc[ct][cg][node][ctx][1], 1, 254);
 }
 
 static void vp5_parse_coeff(vp56_context_t *s)
diff --git a/libavcodec/vp56.c b/libavcodec/vp56.c
index 62683180db..d0165b67fe 100644
--- a/libavcodec/vp56.c
+++ b/libavcodec/vp56.c
@@ -308,8 +308,8 @@ static void vp56_edge_filter(vp56_context_t *s, uint8_t *yuv,
     for (i=0; i<12; i++) {
         v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4) >>3;
         v = s->adjust(v, t);
-        yuv[-pix_inc] = clip_uint8(yuv[-pix_inc] + v);
-        yuv[0] = clip_uint8(yuv[0] - v);
+        yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);
+        yuv[0] = av_clip_uint8(yuv[0] - v);
         yuv += line_inc;
     }
 }
diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index df4ebf87dd..9a2afd8fa0 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -236,7 +236,7 @@ static void vp6_parse_coeff_models(vp56_context_t *s)
     for (pt=0; pt<2; pt++)
         for (ctx=0; ctx<3; ctx++)
             for (node=0; node<5; node++)
-                s->coeff_model_dcct[pt][ctx][node] = clip(((s->coeff_model_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);
+                s->coeff_model_dcct[pt][ctx][node] = av_clip(((s->coeff_model_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);
 }
 
 static void vp6_parse_vector_adjustment(vp56_context_t *s, vp56_mv_t *vect)
@@ -395,7 +395,7 @@ static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
 
     for (y=0; y<8; y++) {
         for (x=0; x<8; x++) {
-            dst[x] = clip_uint8((  src[x-delta  ] * weights[0]
+            dst[x] = av_clip_uint8((  src[x-delta  ] * weights[0]
                                  + src[x        ] * weights[1]
                                  + src[x+delta  ] * weights[2]
                                  + src[x+2*delta] * weights[3] + 64) >> 7);
@@ -434,7 +434,7 @@ static void vp6_filter_diag4(uint8_t *dst, uint8_t *src, int stride,
 
     for (y=0; y<11; y++) {
         for (x=0; x<8; x++) {
-            t[x] = clip_uint8((  src[x-1] * h_weights[0]
+            t[x] = av_clip_uint8((  src[x-1] * h_weights[0]
                                + src[x  ] * h_weights[1]
                                + src[x+1] * h_weights[2]
                                + src[x+2] * h_weights[3] + 64) >> 7);
@@ -446,7 +446,7 @@ static void vp6_filter_diag4(uint8_t *dst, uint8_t *src, int stride,
     t = tmp + 8;
     for (y=0; y<8; y++) {
         for (x=0; x<8; x++) {
-            dst[x] = clip_uint8((  t[x-8 ] * v_weights[0]
+            dst[x] = av_clip_uint8((  t[x-8 ] * v_weights[0]
                                  + t[x   ] * v_weights[1]
                                  + t[x+8 ] * v_weights[2]
                                  + t[x+16] * v_weights[3] + 64) >> 7);
diff --git a/libavcodec/wmv2.c b/libavcodec/wmv2.c
index f3d4f0f23d..d57eaa5e4a 100644
--- a/libavcodec/wmv2.c
+++ b/libavcodec/wmv2.c
@@ -641,8 +641,8 @@ void ff_mspel_motion(MpegEncContext *s,
 
     /* WARNING: do no forget half pels */
     v_edge_pos = s->v_edge_pos;
-    src_x = clip(src_x, -16, s->width);
-    src_y = clip(src_y, -16, s->height);
+    src_x = av_clip(src_x, -16, s->width);
+    src_y = av_clip(src_y, -16, s->height);
 
     if(src_x<=-16 || src_x >= s->width)
         dxy &= ~3;
@@ -688,10 +688,10 @@ void ff_mspel_motion(MpegEncContext *s,
 
     src_x = s->mb_x * 8 + mx;
     src_y = s->mb_y * 8 + my;
-    src_x = clip(src_x, -8, s->width >> 1);
+    src_x = av_clip(src_x, -8, s->width >> 1);
     if (src_x == (s->width >> 1))
         dxy &= ~1;
-    src_y = clip(src_y, -8, s->height >> 1);
+    src_y = av_clip(src_y, -8, s->height >> 1);
     if (src_y == (s->height >> 1))
         dxy &= ~2;
     offset = (src_y * uvlinesize) + src_x;
diff --git a/libavutil/common.h b/libavutil/common.h
index 057dce46a6..eb531d3d73 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -163,7 +163,7 @@ static inline int mid_pred(int a, int b, int c)
  * @param amax maximum value of the clip range
  * @return clipped value
  */
-static inline int clip(int a, int amin, int amax)
+static inline int av_clip(int a, int amin, int amax)
 {
     if (a < amin)      return amin;
     else if (a > amax) return amax;
@@ -175,7 +175,7 @@ static inline int clip(int a, int amin, int amax)
  * @param a value to clip
  * @return clipped value
  */
-static inline uint8_t clip_uint8(int a)
+static inline uint8_t av_clip_uint8(int a)
 {
     if (a&(~255)) return (-a)>>31;
     else          return a;