avformat/dashdec: refine and fix code style of dash_read_header

move the temp variable to the top of the expression paragraph
rename the pls to rep(representation)

libavformat/dashdec.c

@@ -2028,6 +2028,7 @@ static int copy_init_section(struct representation *rep_dest, struct representat
 static int dash_read_header(AVFormatContext *s)
 {
     DASHContext *c = s->priv_data;
+    struct representation *rep;
     int ret = 0;
     int stream_index = 0;
     int i;
@@ -2053,17 +2054,17 @@ static int dash_read_header(AVFormatContext *s)
 
     /* Open the demuxer for video and audio components if available */
     for (i = 0; i < c->n_videos; i++) {
-        struct representation *cur_video = c->videos[i];
+        rep = c->videos[i];
         if (i > 0 && c->is_init_section_common_video) {
-            ret = copy_init_section(cur_video,c->videos[0]);
+            ret = copy_init_section(rep, c->videos[0]);
             if (ret < 0)
                 goto fail;
         }
-        ret = open_demux_for_component(s, cur_video);
+        ret = open_demux_for_component(s, rep);
 
         if (ret)
             goto fail;
-        cur_video->stream_index = stream_index;
+        rep->stream_index = stream_index;
         ++stream_index;
     }
 
@@ -2071,17 +2072,17 @@ static int dash_read_header(AVFormatContext *s)
         c->is_init_section_common_audio = is_common_init_section_exist(c->audios, c->n_audios);
 
     for (i = 0; i < c->n_audios; i++) {
-        struct representation *cur_audio = c->audios[i];
+        rep = c->audios[i];
         if (i > 0 && c->is_init_section_common_audio) {
-            ret = copy_init_section(cur_audio,c->audios[0]);
+            ret = copy_init_section(rep, c->audios[0]);
             if (ret < 0)
                 goto fail;
         }
-        ret = open_demux_for_component(s, cur_audio);
+        ret = open_demux_for_component(s, rep);
 
         if (ret)
             goto fail;
-        cur_audio->stream_index = stream_index;
+        rep->stream_index = stream_index;
         ++stream_index;
     }
 
@@ -2089,21 +2090,20 @@ static int dash_read_header(AVFormatContext *s)
         c->is_init_section_common_audio = is_common_init_section_exist(c->subtitles, c->n_subtitles);
 
     for (i = 0; i < c->n_subtitles; i++) {
-        struct representation *cur_subtitle = c->subtitles[i];
+        rep = c->subtitles[i];
         if (i > 0 && c->is_init_section_common_audio) {
-            ret = copy_init_section(cur_subtitle,c->subtitles[0]);
+            ret = copy_init_section(rep, c->subtitles[0]);
             if (ret < 0)
                 goto fail;
         }
-        ret = open_demux_for_component(s, cur_subtitle);
+        ret = open_demux_for_component(s, rep);
 
         if (ret)
             goto fail;
-        cur_subtitle->stream_index = stream_index;
+        rep->stream_index = stream_index;
         ++stream_index;
     }
 
-
     if (!stream_index) {
         ret = AVERROR_INVALIDDATA;
         goto fail;
@@ -2118,33 +2118,30 @@ static int dash_read_header(AVFormatContext *s)
         }
 
         for (i = 0; i < c->n_videos; i++) {
-            struct representation *pls = c->videos[i];
-
-            av_program_add_stream_index(s, 0, pls->stream_index);
-            pls->assoc_stream = s->streams[pls->stream_index];
-            if (pls->bandwidth > 0)
-                av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
-            if (pls->id[0])
-                av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
+            rep = c->videos[i];
+            av_program_add_stream_index(s, 0, rep->stream_index);
+            rep->assoc_stream = s->streams[rep->stream_index];
+            if (rep->bandwidth > 0)
+                av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
+            if (rep->id[0])
+                av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
         }
         for (i = 0; i < c->n_audios; i++) {
-            struct representation *pls = c->audios[i];
-
-            av_program_add_stream_index(s, 0, pls->stream_index);
-            pls->assoc_stream = s->streams[pls->stream_index];
-            if (pls->bandwidth > 0)
-                av_dict_set_int(&pls->assoc_stream->metadata, "variant_bitrate", pls->bandwidth, 0);
-            if (pls->id[0])
-                av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
+            rep = c->audios[i];
+            av_program_add_stream_index(s, 0, rep->stream_index);
+            rep->assoc_stream = s->streams[rep->stream_index];
+            if (rep->bandwidth > 0)
+                av_dict_set_int(&rep->assoc_stream->metadata, "variant_bitrate", rep->bandwidth, 0);
+            if (rep->id[0])
+                av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
         }
         for (i = 0; i < c->n_subtitles; i++) {
-            struct representation *pls = c->subtitles[i];
-            av_program_add_stream_index(s, 0, pls->stream_index);
-            pls->assoc_stream = s->streams[pls->stream_index];
-            if (pls->id[0])
-                av_dict_set(&pls->assoc_stream->metadata, "id", pls->id, 0);
+            rep = c->subtitles[i];
+            av_program_add_stream_index(s, 0, rep->stream_index);
+            rep->assoc_stream = s->streams[rep->stream_index];
+            if (rep->id[0])
+                av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
         }
-
     }
 
     return 0;