stream_filter/httplive.c: Use first HLS stream in .m3u8 as starting point.

Determine which HLS stream can be served best by this server. If found, then download
the first two segments and start playback.

modules/stream_filter/httplive.c

@@ -965,35 +965,29 @@ static void* hls_Thread(vlc_object_t *p_this)
 static int Prefetch(stream_t *s, int *current)
 {
     stream_sys_t *p_sys = s->p_sys;
-    int i_segment = p_sys->segment;
+    int stream;
 
     /* Try to pick best matching stream */
-    int count = vlc_array_count(p_sys->hls_stream);
-    for (int stream = 0; stream < count; stream++)
-    {
-        hls_stream_t *hls = hls_Get(p_sys->hls_stream, stream);
-        if (hls == NULL)
-            return VLC_EGENERIC;
-
-        segment_t *segment = segment_GetSegment(hls,i_segment);
-        if (segment == NULL )
-            return VLC_EGENERIC;
+again:
+    stream = *current;
 
-        if (Download(s, hls, segment, &stream) != VLC_SUCCESS)
-            return VLC_EGENERIC;
+    hls_stream_t *hls = hls_Get(p_sys->hls_stream, *current);
+    if (hls == NULL)
+        return VLC_EGENERIC;
 
-        i_segment++;
+    segment_t *segment = segment_GetSegment(hls,  p_sys->segment);
+    if (segment == NULL )
+        return VLC_EGENERIC;
 
-        /* */
-        *current = stream;
-    }
+    if (Download(s, hls, segment, current) != VLC_SUCCESS)
+        return VLC_EGENERIC;
 
-    /* Download first 3 segments of this HLS stream */
-    hls_stream_t *hls = hls_Get(p_sys->hls_stream, *current);
-    if (hls == NULL)
-        return VLC_EGENERIC; /* FIXME: */
+    /* Found better bandwidth match, try again */
+    if (*current != stream)
+        goto again;
 
-    for (int i = 0; i < 3; i++)
+    /* Download first 2 segments of this HLS stream */
+    for (int i = 0; i < 2; i++)
     {
         segment_t *segment = segment_GetSegment(hls, p_sys->segment);
         if (segment == NULL )
@@ -1210,8 +1204,8 @@ static int Open(vlc_object_t *p_this)
         goto fail;
     }
 
-    /* */
-    int current = p_sys->current = hls_LowestBandwidthStream(p_sys->hls_stream);
+    /* Choose first HLS stream to start with */
+    int current = p_sys->current = 0;
     p_sys->segment = 0;
 
     if (Prefetch(s, &current) != VLC_SUCCESS)