swresample: Add prefix to soxr_resampler

also move declaration to header
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libswresample/soxr_resample.c

@@ -97,7 +97,7 @@ static int invert_initial_buffer(struct ResampleContext *c, AudioData *dst, cons
     return 0;
 }
 
-struct Resampler const soxr_resampler={
+struct Resampler const swri_soxr_resampler={
     create, destroy, process, flush, NULL /* set_compensation */, get_delay,
     invert_initial_buffer,
 };

libswresample/swresample.c

@@ -176,8 +176,7 @@ av_cold int swr_init(struct SwrContext *s){
 
     switch(s->engine){
 #if CONFIG_LIBSOXR
-        extern struct Resampler const soxr_resampler;
-        case SWR_ENGINE_SOXR: s->resampler = &soxr_resampler; break;
+        case SWR_ENGINE_SOXR: s->resampler = &swri_soxr_resampler; break;
 #endif
         case SWR_ENGINE_SWR : s->resampler = &swri_resampler; break;
         default:

libswresample/swresample_internal.h

@@ -88,6 +88,7 @@ struct Resampler {
 };
 
 extern struct Resampler const swri_resampler;
+extern struct Resampler const swri_soxr_resampler;
 
 struct SwrContext {
     const AVClass *av_class;                        ///< AVClass used for AVOption and av_log()
@@ -200,4 +201,5 @@ void swri_audio_convert_init_x86(struct AudioConvert *ac,
                                  enum AVSampleFormat out_fmt,
                                  enum AVSampleFormat in_fmt,
                                  int channels);
+
 #endif