avprobe: remove a pointless condition and a dead branch

AVStream.codec is always non-NULL

avprobe.c

@@ -610,74 +610,71 @@ static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
 
     probe_int("index", stream->index);
 
-    if ((dec_ctx = stream->codec)) {
-        if ((dec = dec_ctx->codec)) {
-            probe_str("codec_name", dec->name);
-            probe_str("codec_long_name", dec->long_name);
-        } else {
-            probe_str("codec_name", "unknown");
-        }
+    dec_ctx = stream->codec;
+    if ((dec = dec_ctx->codec)) {
+        probe_str("codec_name", dec->name);
+        probe_str("codec_long_name", dec->long_name);
+    } else {
+        probe_str("codec_name", "unknown");
+    }
 
-        probe_str("codec_type", media_type_string(dec_ctx->codec_type));
-        probe_str("codec_time_base",
-                  rational_string(val_str, sizeof(val_str),
-                                  "/", &dec_ctx->time_base));
-
-        /* print AVI/FourCC tag */
-        av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
-        probe_str("codec_tag_string", val_str);
-        probe_str("codec_tag", tag_string(val_str, sizeof(val_str),
-                                          dec_ctx->codec_tag));
-
-        /* print profile, if there is one */
-        if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile)))
-            probe_str("profile", profile);
-
-        switch (dec_ctx->codec_type) {
-        case AVMEDIA_TYPE_VIDEO:
-            probe_int("width", dec_ctx->width);
-            probe_int("height", dec_ctx->height);
-            probe_int("coded_width", dec_ctx->coded_width);
-            probe_int("coded_height", dec_ctx->coded_height);
-            probe_int("has_b_frames", dec_ctx->has_b_frames);
-            if (dec_ctx->sample_aspect_ratio.num)
-                sar = &dec_ctx->sample_aspect_ratio;
-            else if (stream->sample_aspect_ratio.num)
-                sar = &stream->sample_aspect_ratio;
-
-            if (sar) {
-                probe_str("sample_aspect_ratio",
-                          rational_string(val_str, sizeof(val_str), ":", sar));
-                av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
-                          dec_ctx->width  * sar->num, dec_ctx->height * sar->den,
-                          1024*1024);
-                probe_str("display_aspect_ratio",
-                          rational_string(val_str, sizeof(val_str), ":",
-                          &display_aspect_ratio));
-            }
-            desc = av_pix_fmt_desc_get(dec_ctx->pix_fmt);
-            probe_str("pix_fmt", desc ? desc->name : "unknown");
-            probe_int("level", dec_ctx->level);
-
-            probe_str("color_range", av_color_range_name(dec_ctx->color_range));
-            probe_str("color_space", av_color_space_name(dec_ctx->colorspace));
-            probe_str("color_trc", av_color_transfer_name(dec_ctx->color_trc));
-            probe_str("color_pri", av_color_primaries_name(dec_ctx->color_primaries));
-            probe_str("chroma_loc", av_chroma_location_name(dec_ctx->chroma_sample_location));
-            break;
-
-        case AVMEDIA_TYPE_AUDIO:
-            probe_str("sample_rate",
-                      value_string(val_str, sizeof(val_str),
-                                   dec_ctx->sample_rate,
-                                   unit_hertz_str));
-            probe_int("channels", dec_ctx->channels);
-            probe_int("bits_per_sample",
-                      av_get_bits_per_sample(dec_ctx->codec_id));
-            break;
+    probe_str("codec_type", media_type_string(dec_ctx->codec_type));
+    probe_str("codec_time_base",
+              rational_string(val_str, sizeof(val_str),
+                              "/", &dec_ctx->time_base));
+
+    /* print AVI/FourCC tag */
+    av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
+    probe_str("codec_tag_string", val_str);
+    probe_str("codec_tag", tag_string(val_str, sizeof(val_str),
+                                      dec_ctx->codec_tag));
+
+    /* print profile, if there is one */
+    if (dec && (profile = av_get_profile_name(dec, dec_ctx->profile)))
+        probe_str("profile", profile);
+
+    switch (dec_ctx->codec_type) {
+    case AVMEDIA_TYPE_VIDEO:
+        probe_int("width", dec_ctx->width);
+        probe_int("height", dec_ctx->height);
+        probe_int("coded_width", dec_ctx->coded_width);
+        probe_int("coded_height", dec_ctx->coded_height);
+        probe_int("has_b_frames", dec_ctx->has_b_frames);
+        if (dec_ctx->sample_aspect_ratio.num)
+            sar = &dec_ctx->sample_aspect_ratio;
+        else if (stream->sample_aspect_ratio.num)
+            sar = &stream->sample_aspect_ratio;
+
+        if (sar) {
+            probe_str("sample_aspect_ratio",
+                      rational_string(val_str, sizeof(val_str), ":", sar));
+            av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
+                      dec_ctx->width  * sar->num, dec_ctx->height * sar->den,
+                      1024*1024);
+            probe_str("display_aspect_ratio",
+                      rational_string(val_str, sizeof(val_str), ":",
+                      &display_aspect_ratio));
         }
-    } else {
-        probe_str("codec_type", "unknown");
+        desc = av_pix_fmt_desc_get(dec_ctx->pix_fmt);
+        probe_str("pix_fmt", desc ? desc->name : "unknown");
+        probe_int("level", dec_ctx->level);
+
+        probe_str("color_range", av_color_range_name(dec_ctx->color_range));
+        probe_str("color_space", av_color_space_name(dec_ctx->colorspace));
+        probe_str("color_trc", av_color_transfer_name(dec_ctx->color_trc));
+        probe_str("color_pri", av_color_primaries_name(dec_ctx->color_primaries));
+        probe_str("chroma_loc", av_chroma_location_name(dec_ctx->chroma_sample_location));
+        break;
+
+    case AVMEDIA_TYPE_AUDIO:
+        probe_str("sample_rate",
+                  value_string(val_str, sizeof(val_str),
+                               dec_ctx->sample_rate,
+                               unit_hertz_str));
+        probe_int("channels", dec_ctx->channels);
+        probe_int("bits_per_sample",
+                  av_get_bits_per_sample(dec_ctx->codec_id));
+        break;
     }
 
     if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)