swr: mark noise data for noise shaping as const

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswresample/dither_template.c

@@ -23,7 +23,7 @@
 ERROR
 #endif
 
-void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData *srcs, AudioData *noises, int count){
+void RENAME(swri_noise_shaping)(SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count){
     int i, j, pos, ch;
     int taps  = s->dither.ns_taps;
     float S   = s->dither.ns_scale;

libswresample/swresample_internal.h

@@ -167,10 +167,10 @@ int swri_resample_int32(struct ResampleContext *c, int32_t *dst, const int32_t *
 int swri_resample_float(struct ResampleContext *c, float   *dst, const float   *src, int *consumed, int src_size, int dst_size, int update_ctx);
 int swri_resample_double(struct ResampleContext *c,double  *dst, const double  *src, int *consumed, int src_size, int dst_size, int update_ctx);
 
-void swri_noise_shaping_int16 (SwrContext *s, AudioData *dsts, const AudioData *srcs, AudioData *noises, int count);
-void swri_noise_shaping_int32 (SwrContext *s, AudioData *dsts, const AudioData *srcs, AudioData *noises, int count);
-void swri_noise_shaping_float (SwrContext *s, AudioData *dsts, const AudioData *srcs, AudioData *noises, int count);
-void swri_noise_shaping_double(SwrContext *s, AudioData *dsts, const AudioData *srcs, AudioData *noises, int count);
+void swri_noise_shaping_int16 (SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count);
+void swri_noise_shaping_int32 (SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count);
+void swri_noise_shaping_float (SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count);
+void swri_noise_shaping_double(SwrContext *s, AudioData *dsts, const AudioData *srcs, const AudioData *noises, int count);
 
 int swri_rematrix_init(SwrContext *s);
 void swri_rematrix_free(SwrContext *s);