[FFmpeg-devel] [PATCH] Download dash content with byte range info

[Colin NG]

---
 libavformat/dashdec.c | 32 +++++++++++++++++++++++++-------
 1 file changed, 25 insertions(+), 7 deletions(-)

diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 0e3afd2..33255f2 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -522,6 +522,22 @@ static enum AVMediaType get_content_type(xmlNodePtr node)
     return type;
 }
 
+static struct fragment * get_Fragment(char *range) {
+    struct fragment * seg = av_mallocz(sizeof(struct fragment));
+
+    if (!seg)
+        return NULL;
+
+    seg->size = -1;
+    if (range)  {
+        char *str_end_offset;
+        char *str_offset = av_strtok(range, "-", &str_end_offset);
+        seg->url_offset = strtoll(str_offset, NULL, 10);
+        seg->size = strtoll(str_end_offset, NULL, 10) -seg->url_offset+1;
+    }
+    return seg;
+}
+
 static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep,
                                          xmlNodePtr fragmenturl_node,
                                          xmlNodePtr *baseurl_nodes,
@@ -530,11 +546,13 @@ static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representati
 {
     char *initialization_val = NULL;
     char *media_val = NULL;
+    char *range_val = NULL;
 
     if (!av_strcasecmp(fragmenturl_node->name, (const char *)"Initialization")) {
         initialization_val = xmlGetProp(fragmenturl_node, "sourceURL");
-        if (initialization_val) {
-            rep->init_section = av_mallocz(sizeof(struct fragment));
+        range_val = xmlGetProp(fragmenturl_node, "range");
+        if (initialization_val || range_val) {
+            rep->init_section = get_Fragment(range_val);
             if (!rep->init_section) {
                 xmlFree(initialization_val);
                 return AVERROR(ENOMEM);
@@ -548,13 +566,14 @@ static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representati
                 xmlFree(initialization_val);
                 return AVERROR(ENOMEM);
             }
-            rep->init_section->size = -1;
             xmlFree(initialization_val);
+            xmlFree(range_val);
         }
     } else if (!av_strcasecmp(fragmenturl_node->name, (const char *)"SegmentURL")) {
         media_val = xmlGetProp(fragmenturl_node, "media");
-        if (media_val) {
-            struct fragment *seg = av_mallocz(sizeof(struct fragment));
+        range_val = xmlGetProp(fragmenturl_node, "mediaRange");
+        if (media_val || range_val) {
+            struct fragment *seg =  get_Fragment(range_val);
             if (!seg) {
                 xmlFree(media_val);
                 return AVERROR(ENOMEM);
@@ -568,15 +587,14 @@ static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representati
                 xmlFree(media_val);
                 return AVERROR(ENOMEM);
             }
-            seg->size = -1;
             dynarray_add(&rep->fragments, &rep->n_fragments, seg);
             xmlFree(media_val);
+            xmlFree(range_val);
         }
     }
 
     return 0;
 }
-
 static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep,
                                           xmlNodePtr fragment_timeline_node)
 {
-- 
2.7.4