avformat/dashdec: Remove limit on length of id

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/dashdec.c

@@ -82,7 +82,7 @@ struct representation {
     AVFormatContext *ctx;
     int stream_index;
 
-    char id[32];
+    char *id;
     char *lang;
     int bandwidth;
     AVRational framerate;
@@ -361,6 +361,7 @@ static void free_representation(struct representation *pls)
 
     av_freep(&pls->url_template);
     av_freep(&pls->lang);
+    av_freep(&pls->id);
     av_freep(&pls);
 }
 
@@ -842,7 +843,7 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
     char *val = NULL;
     xmlNodePtr baseurl_nodes[4];
     xmlNodePtr representation_node = node;
-    char *rep_id_val, *rep_bandwidth_val;
+    char *rep_bandwidth_val;
     enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN;
 
     // try get information from representation
@@ -876,8 +877,14 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
     representation_segmenttemplate_node = find_child_node_by_name(representation_node, "SegmentTemplate");
     representation_baseurl_node = find_child_node_by_name(representation_node, "BaseURL");
     representation_segmentlist_node = find_child_node_by_name(representation_node, "SegmentList");
-    rep_id_val        = xmlGetProp(representation_node, "id");
     rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth");
+    val               = xmlGetProp(representation_node, "id");
+    if (val) {
+        rep->id = av_strdup(val);
+        xmlFree(val);
+        if (!rep->id)
+            goto enomem;
+    }
 
     baseurl_nodes[0] = mpd_baseurl_node;
     baseurl_nodes[1] = period_baseurl_node;
@@ -886,7 +893,7 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
 
     ret = resolve_content_path(s, url, &c->max_url_size, baseurl_nodes, 4);
     c->max_url_size = aligned(c->max_url_size
-                              + (rep_id_val ? strlen(rep_id_val) : 0)
+                              + (rep->id ? strlen(rep->id) : 0)
                               + (rep_bandwidth_val ? strlen(rep_bandwidth_val) : 0));
     if (ret == AVERROR(ENOMEM) || ret == 0)
         goto free;
@@ -906,7 +913,9 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
                 goto enomem;
             }
             c->max_url_size = aligned(c->max_url_size  + strlen(val));
-            rep->init_section->url = get_content_url(baseurl_nodes, 4,  c->max_url_size, rep_id_val, rep_bandwidth_val, val);
+            rep->init_section->url = get_content_url(baseurl_nodes, 4,
+                                                     c->max_url_size, rep->id,
+                                                     rep_bandwidth_val, val);
             xmlFree(val);
             if (!rep->init_section->url)
                 goto enomem;
@@ -915,7 +924,9 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
         val = get_val_from_nodes_tab(fragment_templates_tab, 4, "media");
         if (val) {
             c->max_url_size = aligned(c->max_url_size  + strlen(val));
-            rep->url_template = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, val);
+            rep->url_template = get_content_url(baseurl_nodes, 4,
+                                                c->max_url_size, rep->id,
+                                                rep_bandwidth_val, val);
             xmlFree(val);
         }
         val = get_val_from_nodes_tab(fragment_templates_tab, 4, "presentationTimeOffset");
@@ -980,7 +991,8 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
             av_free(seg);
             goto free;
         }
-        seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size, rep_id_val, rep_bandwidth_val, NULL);
+        seg->url = get_content_url(baseurl_nodes, 4, c->max_url_size,
+                                   rep->id, rep_bandwidth_val, NULL);
         if (!seg->url)
             goto enomem;
         seg->size = -1;
@@ -1014,8 +1026,7 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
         fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node);
         while (fragmenturl_node) {
             ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node,
-                                                baseurl_nodes,
-                                                rep_id_val,
+                                                baseurl_nodes, rep->id,
                                                 rep_bandwidth_val);
             if (ret < 0)
                 goto free;
@@ -1035,15 +1046,14 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
             }
         }
     } else {
-        av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", rep_id_val);
+        av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id '%s' \n",
+               rep->id ? rep->id : "");
         goto free;
     }
 
     if (rep->fragment_duration > 0 && !rep->fragment_timescale)
         rep->fragment_timescale = 1;
     rep->bandwidth = rep_bandwidth_val ? atoi(rep_bandwidth_val) : 0;
-    if (rep_id_val)
-        av_strlcpy(rep->id, rep_id_val, sizeof(rep->id));
     rep->framerate = av_make_q(0, 0);
     if (type == AVMEDIA_TYPE_VIDEO) {
         char *rep_framerate_val = xmlGetProp(representation_node, "frameRate");
@@ -1070,8 +1080,6 @@ static int parse_manifest_representation(AVFormatContext *s, const char *url,
         goto free;
 
 end:
-    if (rep_id_val)
-        xmlFree(rep_id_val);
     if (rep_bandwidth_val)
         xmlFree(rep_bandwidth_val);
 
@@ -2129,7 +2137,7 @@ static int dash_read_header(AVFormatContext *s)
         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])
+        if (rep->id)
             av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
     }
     for (i = 0; i < c->n_audios; i++) {
@@ -2138,7 +2146,7 @@ static int dash_read_header(AVFormatContext *s)
         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])
+        if (rep->id)
             av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
         if (rep->lang) {
             av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);
@@ -2149,7 +2157,7 @@ static int dash_read_header(AVFormatContext *s)
         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])
+        if (rep->id)
             av_dict_set(&rep->assoc_stream->metadata, "id", rep->id, 0);
         if (rep->lang) {
             av_dict_set(&rep->assoc_stream->metadata, "language", rep->lang, 0);