mpegaudiodsp: Change type of array stride parameters to ptrdiff_t

This avoids SIMD-optimized functions having to sign-extend their
stride argument manually to be able to do pointer arithmetic.

libavcodec/aarch64/mpegaudiodsp_neon.S

@@ -34,7 +34,6 @@ endconst
 .macro   apply_window   type, st
 function ff_mpadsp_apply_window_\type\()_neon, export=1
         mov             x7,  x0
-        sxtw            x4,  w4  // incr
         add             x8,  x0,  #512<<2
         ld1             {v0.4s,v1.4s,v2.4s,v3.4s},  [x7],  #64
         ld1             {v4.4s,v5.4s,v6.4s,v7.4s},  [x7],  #64

libavcodec/mpegaudiodsp.h

@@ -19,14 +19,18 @@
 #ifndef AVCODEC_MPEGAUDIODSP_H
 #define AVCODEC_MPEGAUDIODSP_H
 
+#include <stddef.h>
 #include <stdint.h>
+
 #include "libavutil/common.h"
 
 typedef struct MPADSPContext {
     void (*apply_window_float)(float *synth_buf, float *window,
-                               int *dither_state, float *samples, int incr);
+                               int *dither_state, float *samples,
+                               ptrdiff_t incr);
     void (*apply_window_fixed)(int32_t *synth_buf, int32_t *window,
-                               int *dither_state, int16_t *samples, int incr);
+                               int *dither_state, int16_t *samples,
+                               ptrdiff_t incr);
     void (*dct32_float)(float *dst, const float *src);
     void (*dct32_fixed)(int *dst, const int *src);
     void (*imdct36_blocks_float)(float *out, float *buf, float *in,
@@ -45,13 +49,13 @@ extern const int32_t ff_mpa_enwindow[257];
 void ff_mpa_synth_filter_fixed(MPADSPContext *s,
                                int32_t *synth_buf_ptr, int *synth_buf_offset,
                                int32_t *window, int *dither_state,
-                               int16_t *samples, int incr,
+                               int16_t *samples, ptrdiff_t incr,
                                int32_t *sb_samples);
 
 void ff_mpa_synth_filter_float(MPADSPContext *s,
                                float *synth_buf_ptr, int *synth_buf_offset,
                                float *window, int *dither_state,
-                               float *samples, int incr,
+                               float *samples, ptrdiff_t incr,
                                float *sb_samples);
 
 void ff_mpadsp_init_aarch64(MPADSPContext *s);
@@ -64,10 +68,10 @@ void ff_mpa_synth_init_fixed(int32_t *window);
 
 void ff_mpadsp_apply_window_float(float *synth_buf, float *window,
                                   int *dither_state, float *samples,
-                                  int incr);
+                                  ptrdiff_t incr);
 void ff_mpadsp_apply_window_fixed(int32_t *synth_buf, int32_t *window,
                                   int *dither_state, int16_t *samples,
-                                  int incr);
+                                  ptrdiff_t incr);
 
 void ff_imdct36_blocks_float(float *out, float *buf, float *in,
                              int count, int switch_point, int block_type);

libavcodec/mpegaudiodsp_template.c

@@ -120,7 +120,7 @@ DECLARE_ALIGNED(16, MPA_INT, RENAME(ff_mpa_synth_window))[512+256];
 
 void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window,
                                   int *dither_state, OUT_INT *samples,
-                                  int incr)
+                                  ptrdiff_t incr)
 {
     register const MPA_INT *w, *w2, *p;
     int j;
@@ -176,7 +176,7 @@ void RENAME(ff_mpadsp_apply_window)(MPA_INT *synth_buf, MPA_INT *window,
 void RENAME(ff_mpa_synth_filter)(MPADSPContext *s, MPA_INT *synth_buf_ptr,
                                  int *synth_buf_offset,
                                  MPA_INT *window, int *dither_state,
-                                 OUT_INT *samples, int incr,
+                                 OUT_INT *samples, ptrdiff_t incr,
                                  MPA_INT *sb_samples)
 {
     MPA_INT *synth_buf;

libavcodec/ppc/mpegaudiodsp_altivec.c

@@ -90,7 +90,7 @@ static void apply_window(const float *buf, const float *win1,
 }
 
 static void apply_window_mp3(float *in, float *win, int *unused, float *out,
-                             int incr)
+                             ptrdiff_t incr)
 {
     LOCAL_ALIGNED_16(float, suma, [17]);
     LOCAL_ALIGNED_16(float, sumb, [17]);

libavcodec/x86/mpegaudiodsp.c

@@ -100,7 +100,7 @@ static void apply_window(const float *buf, const float *win1,
 }
 
 static void apply_window_mp3(float *in, float *win, int *unused, float *out,
-                             int incr)
+                             ptrdiff_t incr)
 {
     LOCAL_ALIGNED_16(float, suma, [17]);
     LOCAL_ALIGNED_16(float, sumb, [17]);