all: use av_channel_layout_describe_bprint instead of av_channel_layout_describe in a few places

Where an AVBPrint buffer is used later anyway.

Signed-off-by: Marton Balint <cus@passwd.hu>

libavcodec/avcodec.c

@@ -656,12 +656,7 @@ void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
         if (enc->sample_rate) {
             av_bprintf(&bprint, "%d Hz, ", enc->sample_rate);
         }
-        {
-            char buf[512];
-            int ret = av_channel_layout_describe(&enc->ch_layout, buf, sizeof(buf));
-            if (ret >= 0)
-                av_bprintf(&bprint, "%s", buf);
-        }
+        av_channel_layout_describe_bprint(&enc->ch_layout, &bprint);
         if (enc->sample_fmt != AV_SAMPLE_FMT_NONE &&
             (str = av_get_sample_fmt_name(enc->sample_fmt))) {
             av_bprintf(&bprint, ", %s", str);

libavfilter/af_amerge.c

@@ -153,7 +153,6 @@ static int config_output(AVFilterLink *outlink)
     AVFilterContext *ctx = outlink->src;
     AMergeContext *s = ctx->priv;
     AVBPrint bp;
-    char buf[128];
     int i;
 
     s->bps = av_get_bytes_per_sample(outlink->format);
@@ -162,12 +161,10 @@ static int config_output(AVFilterLink *outlink)
     av_bprint_init(&bp, 0, AV_BPRINT_SIZE_AUTOMATIC);
     for (i = 0; i < s->nb_inputs; i++) {
         av_bprintf(&bp, "%sin%d:", i ? " + " : "", i);
-        av_channel_layout_describe(&ctx->inputs[i]->ch_layout, buf, sizeof(buf));
-        av_bprintf(&bp, "%s", buf);
+        av_channel_layout_describe_bprint(&ctx->inputs[i]->ch_layout, &bp);
     }
     av_bprintf(&bp, " -> out:");
-    av_channel_layout_describe(&outlink->ch_layout, buf, sizeof(buf));
-    av_bprintf(&bp, "%s", buf);
+    av_channel_layout_describe_bprint(&outlink->ch_layout, &bp);
     av_log(ctx, AV_LOG_VERBOSE, "%s\n", bp.str);
 
     return 0;

libavfilter/graphdump.c

@@ -30,7 +30,6 @@
 static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
 {
     const char *format;
-    char layout[128];
     AVBPrint dummy_buffer;
 
     if (!buf) {
@@ -50,8 +49,7 @@ static int print_link_prop(AVBPrint *buf, AVFilterLink *link)
             format = av_x_if_null(av_get_sample_fmt_name(link->format), "?");
             av_bprintf(buf, "[%dHz %s:",
                        (int)link->sample_rate, format);
-            av_channel_layout_describe(&link->ch_layout, layout, sizeof(layout));
-            av_bprintf(buf, "%s", layout);
+            av_channel_layout_describe_bprint(&link->ch_layout, buf);
             av_bprint_chars(buf, ']', 1);
             break;