dwt: remove variable-length arrays
authorRonald S. Bultje <rsbultje@gmail.com>
Thu, 14 Jun 2012 10:47:55 +0000 (11:47 +0100)
committerMans Rullgard <mans@mansr.com>
Sun, 17 Jun 2012 22:20:10 +0000 (23:20 +0100)
Signed-off-by: Mans Rullgard <mans@mansr.com>
libavcodec/dwt.c
libavcodec/dwt.h
libavcodec/snow.c
libavcodec/snow.h
libavcodec/snowdec.c
libavcodec/snowenc.c
libavcodec/x86/snowdsp_mmx.c

index d3d4f3b..56e4a57 100644 (file)
@@ -243,9 +243,8 @@ static av_always_inline void inv_liftS(IDWTELEM *dst, IDWTELEM *src,
 }
 #endif /* ! liftS */
 
-static void horizontal_decompose53i(DWTELEM *b, int width)
+static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
 {
-    DWTELEM temp[width];
     const int width2 = width >> 1;
     int x;
     const int w2 = (width + 1) >> 1;
@@ -311,8 +310,8 @@ static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
         b1[i] += (b0[i] + b2[i] + 2) >> 2;
 }
 
-static void spatial_decompose53i(DWTELEM *buffer, int width, int height,
-                                 int stride)
+static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
+                                 int width, int height, int stride)
 {
     int y;
     DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride;
@@ -323,9 +322,9 @@ static void spatial_decompose53i(DWTELEM *buffer, int width, int height,
         DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
 
         if (y + 1 < (unsigned)height)
-            horizontal_decompose53i(b2, width);
+            horizontal_decompose53i(b2, temp, width);
         if (y + 2 < (unsigned)height)
-            horizontal_decompose53i(b3, width);
+            horizontal_decompose53i(b3, temp, width);
 
         if (y + 1 < (unsigned)height)
             vertical_decompose53iH0(b1, b2, b3, width);
@@ -337,9 +336,8 @@ static void spatial_decompose53i(DWTELEM *buffer, int width, int height,
     }
 }
 
-static void horizontal_decompose97i(DWTELEM *b, int width)
+static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width)
 {
-    DWTELEM temp[width];
     const int w2 = (width + 1) >> 1;
 
     lift(temp + w2, b + 1, b,         1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
@@ -389,8 +387,8 @@ static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
         b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
 }
 
-static void spatial_decompose97i(DWTELEM *buffer, int width, int height,
-                                 int stride)
+static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
+                                 int width, int height, int stride)
 {
     int y;
     DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride;
@@ -403,9 +401,9 @@ static void spatial_decompose97i(DWTELEM *buffer, int width, int height,
         DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
 
         if (y + 3 < (unsigned)height)
-            horizontal_decompose97i(b4, width);
+            horizontal_decompose97i(b4, temp, width);
         if (y + 4 < (unsigned)height)
-            horizontal_decompose97i(b5, width);
+            horizontal_decompose97i(b5, temp, width);
 
         if (y + 3 < (unsigned)height)
             vertical_decompose97iH0(b3, b4, b5, width);
@@ -423,20 +421,20 @@ static void spatial_decompose97i(DWTELEM *buffer, int width, int height,
     }
 }
 
-void ff_spatial_dwt(DWTELEM *buffer, int width, int height, int stride,
-                    int type, int decomposition_count)
+void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height,
+                    int stride, int type, int decomposition_count)
 {
     int level;
 
     for (level = 0; level < decomposition_count; level++) {
         switch (type) {
         case DWT_97:
-            spatial_decompose97i(buffer,
+            spatial_decompose97i(buffer, temp,
                                  width >> level, height >> level,
                                  stride << level);
             break;
         case DWT_53:
-            spatial_decompose53i(buffer,
+            spatial_decompose53i(buffer, temp,
                                  width >> level, height >> level,
                                  stride << level);
             break;
@@ -444,9 +442,8 @@ void ff_spatial_dwt(DWTELEM *buffer, int width, int height, int stride,
     }
 }
 
-static void horizontal_compose53i(IDWTELEM *b, int width)
+static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
 {
-    IDWTELEM temp[width];
     const int width2 = width >> 1;
     const int w2     = (width + 1) >> 1;
     int x;
@@ -506,6 +503,7 @@ static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
 }
 
 static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
+                                           IDWTELEM *temp,
                                            int width, int height,
                                            int stride_line)
 {
@@ -535,17 +533,18 @@ static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
     }
 
     if (y - 1 < (unsigned)height)
-        horizontal_compose53i(b0, width);
+        horizontal_compose53i(b0, temp, width);
     if (y + 0 < (unsigned)height)
-        horizontal_compose53i(b1, width);
+        horizontal_compose53i(b1, temp, width);
 
     cs->b0  = b2;
     cs->b1  = b3;
     cs->y  += 2;
 }
 
-static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer, int width,
-                                  int height, int stride)
+static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
+                                  IDWTELEM *temp, int width, int height,
+                                  int stride)
 {
     int y        = cs->y;
     IDWTELEM *b0 = cs->b0;
@@ -559,27 +558,26 @@ static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer, int width,
         vertical_compose53iH0(b0, b1, b2, width);
 
     if (y - 1 < (unsigned)height)
-        horizontal_compose53i(b0, width);
+        horizontal_compose53i(b0, temp, width);
     if (y + 0 < (unsigned)height)
-        horizontal_compose53i(b1, width);
+        horizontal_compose53i(b1, temp, width);
 
     cs->b0  = b2;
     cs->b1  = b3;
     cs->y  += 2;
 }
 
-static void av_unused spatial_compose53i(IDWTELEM *buffer, int width,
-                                         int height, int stride)
+static void av_unused spatial_compose53i(IDWTELEM *buffer, IDWTELEM *temp,
+                                         int width, int height, int stride)
 {
     DWTCompose cs;
     spatial_compose53i_init(&cs, buffer, height, stride);
     while (cs.y <= height)
-        spatial_compose53i_dy(&cs, buffer, width, height, stride);
+        spatial_compose53i_dy(&cs, buffer, temp, width, height, stride);
 }
 
-void ff_snow_horizontal_compose97i(IDWTELEM *b, int width)
+void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
 {
-    IDWTELEM temp[width];
     const int w2 = (width + 1) >> 1;
 
 #if 0 //maybe more understadable but slower
@@ -693,8 +691,9 @@ static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height
 }
 
 static void spatial_compose97i_dy_buffered(DWTContext *dsp, DWTCompose *cs,
-                                           slice_buffer *sb, int width,
-                                           int height, int stride_line)
+                                           slice_buffer * sb, IDWTELEM *temp,
+                                           int width, int height,
+                                           int stride_line)
 {
     int y = cs->y;
 
@@ -723,9 +722,9 @@ static void spatial_compose97i_dy_buffered(DWTContext *dsp, DWTCompose *cs,
     }
 
     if (y - 1 < (unsigned)height)
-        dsp->horizontal_compose97i(b0, width);
+        dsp->horizontal_compose97i(b0, temp, width);
     if (y + 0 < (unsigned)height)
-        dsp->horizontal_compose97i(b1, width);
+        dsp->horizontal_compose97i(b1, temp, width);
 
     cs->b0  = b2;
     cs->b1  = b3;
@@ -734,8 +733,9 @@ static void spatial_compose97i_dy_buffered(DWTContext *dsp, DWTCompose *cs,
     cs->y  += 2;
 }
 
-static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer, int width,
-                                  int height, int stride)
+static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
+                                  IDWTELEM *temp, int width, int height,
+                                  int stride)
 {
     int y        = cs->y;
     IDWTELEM *b0 = cs->b0;
@@ -755,9 +755,9 @@ static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer, int width,
         vertical_compose97iH0(b0, b1, b2, width);
 
     if (y - 1 < (unsigned)height)
-        ff_snow_horizontal_compose97i(b0, width);
+        ff_snow_horizontal_compose97i(b0, temp, width);
     if (y + 0 < (unsigned)height)
-        ff_snow_horizontal_compose97i(b1, width);
+        ff_snow_horizontal_compose97i(b1, temp, width);
 
     cs->b0  = b2;
     cs->b1  = b3;
@@ -766,13 +766,13 @@ static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer, int width,
     cs->y  += 2;
 }
 
-static void av_unused spatial_compose97i(IDWTELEM *buffer, int width,
-                                         int height, int stride)
+static void av_unused spatial_compose97i(IDWTELEM *buffer, IDWTELEM *temp,
+                                         int width, int height, int stride)
 {
     DWTCompose cs;
     spatial_compose97i_init(&cs, buffer, height, stride);
     while (cs.y <= height)
-        spatial_compose97i_dy(&cs, buffer, width, height, stride);
+        spatial_compose97i_dy(&cs, buffer, temp, width, height, stride);
 }
 
 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
@@ -795,9 +795,9 @@ void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
 }
 
 void ff_spatial_idwt_buffered_slice(DWTContext *dsp, DWTCompose *cs,
-                                    slice_buffer *slice_buf, int width,
-                                    int height, int stride_line, int type,
-                                    int decomposition_count, int y)
+                                    slice_buffer *slice_buf, IDWTELEM *temp,
+                                    int width, int height, int stride_line,
+                                    int type, int decomposition_count, int y)
 {
     const int support = type == 1 ? 3 : 5;
     int level;
@@ -808,13 +808,13 @@ void ff_spatial_idwt_buffered_slice(DWTContext *dsp, DWTCompose *cs,
         while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
             switch (type) {
             case DWT_97:
-                spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf,
+                spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp,
                                                width >> level,
                                                height >> level,
                                                stride_line << level);
                 break;
             case DWT_53:
-                spatial_compose53i_dy_buffered(cs + level, slice_buf,
+                spatial_compose53i_dy_buffered(cs + level, slice_buf, temp,
                                                width >> level,
                                                height >> level,
                                                stride_line << level);
@@ -842,8 +842,9 @@ static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
     }
 }
 
-static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer, int width,
-                                  int height, int stride, int type,
+static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
+                                  IDWTELEM *temp, int width, int height,
+                                  int stride, int type,
                                   int decomposition_count, int y)
 {
     const int support = type == 1 ? 3 : 5;
@@ -855,26 +856,26 @@ static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer, int width,
         while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
             switch (type) {
             case DWT_97:
-                spatial_compose97i_dy(cs + level, buffer, width >> level,
+                spatial_compose97i_dy(cs + level, buffer, temp, width >> level,
                                       height >> level, stride << level);
                 break;
             case DWT_53:
-                spatial_compose53i_dy(cs + level, buffer, width >> level,
+                spatial_compose53i_dy(cs + level, buffer, temp, width >> level,
                                       height >> level, stride << level);
                 break;
             }
         }
 }
 
-void ff_spatial_idwt(IDWTELEM *buffer, int width, int height, int stride,
-                     int type, int decomposition_count)
+void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
+                     int stride, int type, int decomposition_count)
 {
     DWTCompose cs[MAX_DECOMPOSITIONS];
     int y;
     ff_spatial_idwt_init(cs, buffer, width, height, stride, type,
                          decomposition_count);
     for (y = 0; y < height; y += 4)
-        ff_spatial_idwt_slice(cs, buffer, width, height, stride, type,
+        ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
                               decomposition_count, y);
 }
 
@@ -883,7 +884,7 @@ static inline int w_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size,
 {
     int s, i, j;
     const int dec_count = w == 8 ? 3 : 4;
-    int tmp[32 * 32];
+    int tmp[32 * 32], tmp2[32];
     int level, ori;
     static const int scale[2][2][4][4] = {
         {
@@ -925,7 +926,7 @@ static inline int w_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size,
         pix2 += line_size;
     }
 
-    ff_spatial_dwt(tmp, w, h, 32, type, dec_count);
+    ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count);
 
     s = 0;
     assert(w == h);
index 9229928..771a9bf 100644 (file)
@@ -50,7 +50,7 @@ typedef struct DWTContext {
     void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
                                 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
                                 int width);
-    void (*horizontal_compose97i)(IDWTELEM *b, int width);
+    void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
     void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
                              uint8_t **block, int b_w, int b_h, int src_x,
                              int src_y, int src_stride, slice_buffer *sb,
@@ -148,7 +148,7 @@ IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
 void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
                                  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
                                  int width);
-void ff_snow_horizontal_compose97i(IDWTELEM *b, int width);
+void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width);
 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
                               uint8_t **block, int b_w, int b_h, int src_x,
                               int src_y, int src_stride, slice_buffer *sb,
@@ -157,18 +157,18 @@ void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
 int ff_w53_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
 int ff_w97_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
 
-void ff_spatial_dwt(int *buffer, int width, int height, int stride, int type,
-                    int decomposition_count);
+void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
+                    int type, int decomposition_count);
 
 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
                                    int height, int stride_line, int type,
                                    int decomposition_count);
 void ff_spatial_idwt_buffered_slice(DWTContext *dsp, DWTCompose *cs,
-                                    slice_buffer *slice_buf, int width,
-                                    int height, int stride_line, int type,
-                                    int decomposition_count, int y);
-void ff_spatial_idwt(IDWTELEM *buffer, int width, int height, int stride,
-                     int type, int decomposition_count);
+                                    slice_buffer *slice_buf, IDWTELEM *temp,
+                                    int width, int height, int stride_line,
+                                    int type, int decomposition_count, int y);
+void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
+                     int stride, int type, int decomposition_count);
 
 void ff_dwt_init(DWTContext *c);
 void ff_dwt_init_x86(DWTContext *c);
index 384cda8..edd7d07 100644 (file)
@@ -440,6 +440,8 @@ av_cold int ff_snow_common_init(AVCodecContext *avctx){
 
     s->spatial_idwt_buffer= av_mallocz(width*height*sizeof(IDWTELEM));
     s->spatial_dwt_buffer= av_mallocz(width*height*sizeof(DWTELEM)); //FIXME this does not belong here
+    s->temp_dwt_buffer = av_mallocz(width * sizeof(DWTELEM));
+    s->temp_idwt_buffer = av_mallocz(width * sizeof(IDWTELEM));
 
     for(i=0; i<MAX_REF_FRAMES; i++)
         for(j=0; j<MAX_REF_FRAMES; j++)
@@ -618,7 +620,9 @@ av_cold void ff_snow_common_end(SnowContext *s)
     int plane_index, level, orientation, i;
 
     av_freep(&s->spatial_dwt_buffer);
+    av_freep(&s->temp_dwt_buffer);
     av_freep(&s->spatial_idwt_buffer);
+    av_freep(&s->temp_idwt_buffer);
 
     s->m.me.temp= NULL;
     av_freep(&s->m.me.scratchpad);
index 5edb8f8..3ceb6af 100644 (file)
@@ -132,7 +132,9 @@ typedef struct SnowContext{
     int16_t (*ref_mvs[MAX_REF_FRAMES])[2];
     uint32_t *ref_scores[MAX_REF_FRAMES];
     DWTELEM *spatial_dwt_buffer;
+    DWTELEM *temp_dwt_buffer;
     IDWTELEM *spatial_idwt_buffer;
+    IDWTELEM *temp_idwt_buffer;
     int colorspace_type;
     int chroma_h_shift;
     int chroma_v_shift;
index 62ef5f1..5dec277 100644 (file)
@@ -502,7 +502,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, AVPac
             }
 
             for(; yd<slice_h; yd+=4){
-                ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
+                ff_spatial_idwt_buffered_slice(&s->dwt, cs, &s->sb, s->temp_idwt_buffer, w, h, 1, s->spatial_decomposition_type, s->spatial_decomposition_count, yd);
             }
 
             if(s->qlog == LOSSLESS_QLOG){
index 7b010e1..7e3b68f 100644 (file)
@@ -93,7 +93,7 @@ static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, i
     //FIXME pass the copy cleanly ?
 
 //    memcpy(dwt_buffer, buffer, height * stride * sizeof(DWTELEM));
-    ff_spatial_dwt(buffer, width, height, stride, type, s->spatial_decomposition_count);
+    ff_spatial_dwt(buffer, s->temp_dwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
 
     for(level=0; level<s->spatial_decomposition_count; level++){
         for(orientation=level ? 1 : 0; orientation<4; orientation++){
@@ -118,7 +118,7 @@ static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, i
                     for(xs= 0; xs<Q2_STEP; xs++){
                         memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
                         dequantize_all(s, p, idwt2_buffer, width, height);
-                        ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
+                        ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
                         find_sse(s, p, best_score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
                         memcpy(idwt2_buffer, best_dequant, height * stride * sizeof(IDWTELEM));
                         for(y=ys; y<b->height; y+= Q2_STEP){
@@ -129,7 +129,7 @@ static void dwt_quantize(SnowContext *s, Plane *p, DWTELEM *buffer, int width, i
                             }
                         }
                         dequantize_all(s, p, idwt2_buffer, width, height);
-                        ff_spatial_idwt(idwt2_buffer, width, height, stride, type, s->spatial_decomposition_count);
+                        ff_spatial_idwt(idwt2_buffer, s->temp_idwt_buffer, width, height, stride, type, s->spatial_decomposition_count);
                         find_sse(s, p, score, score_stride, idwt2_buffer, s->spatial_idwt_buffer, level, orientation);
                         for(y=ys; y<b->height; y+= Q2_STEP){
                             for(x=xs; x<b->width; x+= Q2_STEP){
@@ -1586,7 +1586,7 @@ static void calculate_visual_weight(SnowContext *s, Plane *p){
 
             memset(s->spatial_idwt_buffer, 0, sizeof(*s->spatial_idwt_buffer)*width*height);
             ibuf[b->width/2 + b->height/2*b->stride]= 256*16;
-            ff_spatial_idwt(s->spatial_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
+            ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, width, height, width, s->spatial_decomposition_type, s->spatial_decomposition_count);
             for(y=0; y<height; y++){
                 for(x=0; x<width; x++){
                     int64_t d= s->spatial_idwt_buffer[x + y*width]*16;
@@ -1775,7 +1775,7 @@ redo_frame:
             /*  if(QUANTIZE2)
                 dwt_quantize(s, p, s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type);
             else*/
-                ff_spatial_dwt(s->spatial_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
+                ff_spatial_dwt(s->spatial_dwt_buffer, s->temp_dwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
 
             if(s->pass1_rc && plane_index==0){
                 int delta_qlog = ratecontrol_1pass(s, pic);
@@ -1814,7 +1814,7 @@ redo_frame:
                 }
             }
 
-            ff_spatial_idwt(s->spatial_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
+            ff_spatial_idwt(s->spatial_idwt_buffer, s->temp_idwt_buffer, w, h, w, s->spatial_decomposition_type, s->spatial_decomposition_count);
             if(s->qlog == LOSSLESS_QLOG){
                 for(y=0; y<h; y++){
                     for(x=0; x<w; x++){
index 00b6261..729a13a 100644 (file)
@@ -26,9 +26,8 @@
 #include "libavcodec/dwt.h"
 #include "dsputil_mmx.h"
 
-static void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, int width){
+static void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, IDWTELEM *temp, int width){
     const int w2= (width+1)>>1;
-    DECLARE_ALIGNED(16, IDWTELEM, temp)[width>>1];
     const int w_l= (width>>1);
     const int w_r= w2 - 1;
     int i;
@@ -215,9 +214,8 @@ static void ff_snow_horizontal_compose97i_sse2(IDWTELEM *b, int width){
     }
 }
 
-static void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, int width){
+static void ff_snow_horizontal_compose97i_mmx(IDWTELEM *b, IDWTELEM *temp, int width){
     const int w2= (width+1)>>1;
-    IDWTELEM temp[width >> 1];
     const int w_l= (width>>1);
     const int w_r= w2 - 1;
     int i;