swr-test: print channel layout, instead of just channel counts

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

libswresample/swresample_test.c

@@ -181,6 +181,8 @@ int main(int argc, char **argv){
     qsort(remaining_tests + max_tests - num_tests, num_tests, sizeof(remaining_tests[0]), cmp);
     in_sample_rate=16000;
     for(test=0; test<num_tests; test++){
+        char  in_layout_string[256];
+        char out_layout_string[256];
         unsigned vector= remaining_tests[max_tests - test - 1];
 
         in_ch_layout    = layouts[vector % FF_ARRAY_ELEMS(layouts)]; vector /= FF_ARRAY_ELEMS(layouts);
@@ -194,8 +196,10 @@ int main(int argc, char **argv){
                     in_ch_count= av_get_channel_layout_nb_channels(in_ch_layout);
                         int out_count, mid_count, out_ch_count;
                         out_ch_count= av_get_channel_layout_nb_channels(out_ch_layout);
-                        fprintf(stderr, "ch %d->%d, rate:%5d->%5d, fmt:%s->%s\n",
-                               in_ch_count, out_ch_count,
+                        av_get_channel_layout_string( in_layout_string, sizeof( in_layout_string),  in_ch_count,  in_ch_layout);
+                        av_get_channel_layout_string(out_layout_string, sizeof(out_layout_string), out_ch_count, out_ch_layout);
+                        fprintf(stderr, "TEST: %s->%s, rate:%5d->%5d, fmt:%s->%s\n",
+                               in_layout_string, out_layout_string,
                                in_sample_rate, out_sample_rate,
                                av_get_sample_fmt_name(in_sample_fmt), av_get_sample_fmt_name(out_sample_fmt));
                         forw_ctx  = swr_alloc_set_opts(forw_ctx, out_ch_layout, av_get_alt_sample_fmt(out_sample_fmt, 1), out_sample_rate,