avcodec/mips: Fixed four warnings in vc1dsp

Change the stride argument to ptrdiff_t in the following functions:
ff_put_no_rnd_vc1_chroma_mc8_mmi, ff_put_no_rnd_vc1_chroma_mc4_mmi,
ff_avg_no_rnd_vc1_chroma_mc8_mmi, ff_avg_no_rnd_vc1_chroma_mc4_mmi.

Reviewed-by: Shiyou Yin <yinshiyou-hf@loongson.cn>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/mips/vc1dsp_mips.h

@@ -180,15 +180,15 @@ void ff_vc1_h_loop_filter16_mmi(uint8_t *src, int stride, int pq);
 
 void ff_put_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y);
+                                      ptrdiff_t stride, int h, int x, int y);
 void ff_put_no_rnd_vc1_chroma_mc4_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y);
+                                      ptrdiff_t stride, int h, int x, int y);
 void ff_avg_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y);
+                                      ptrdiff_t stride, int h, int x, int y);
 void ff_avg_no_rnd_vc1_chroma_mc4_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y);
+                                      ptrdiff_t stride, int h, int x, int y);
 
 #endif /* AVCODEC_MIPS_VC1DSP_MIPS_H */

libavcodec/mips/vc1dsp_mmi.c

@@ -2241,7 +2241,7 @@ DECLARE_FUNCTION(3, 3)
 
 void ff_put_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y)
+                                      ptrdiff_t stride, int h, int x, int y)
 {
     const int A = (8 - x) * (8 - y);
     const int B =     (x) * (8 - y);
@@ -2296,7 +2296,7 @@ void ff_put_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
 
 void ff_put_no_rnd_vc1_chroma_mc4_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y)
+                                      ptrdiff_t stride, int h, int x, int y)
 {
     const int A = (8 - x) * (8 - y);
     const int B =     (x) * (8 - y);
@@ -2349,7 +2349,7 @@ void ff_put_no_rnd_vc1_chroma_mc4_mmi(uint8_t *dst /* align 8 */,
 
 void ff_avg_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y)
+                                      ptrdiff_t stride, int h, int x, int y)
 {
     const int A = (8 - x) * (8 - y);
     const int B =     (x) * (8 - y);
@@ -2407,7 +2407,7 @@ void ff_avg_no_rnd_vc1_chroma_mc8_mmi(uint8_t *dst /* align 8 */,
 
 void ff_avg_no_rnd_vc1_chroma_mc4_mmi(uint8_t *dst /* align 8 */,
                                       uint8_t *src /* align 1 */,
-                                      int stride, int h, int x, int y)
+                                      ptrdiff_t stride, int h, int x, int y)
 {
     const int A = (8 - x) * (8 - y);
     const int B = (    x) * (8 - y);