Minamp 1.1

- Run network/TLS work on 256 KB-stack threads (net/Threads.java): Android 2.x's
  ~16 KB default stack overflowed during the bundled TLS handshake
- Close pooled TLS connections off the caller thread
- Try several Plex music-transcoder URL variants until the server accepts one,
  and remember the one that worked
- Accept pasted server URLs with paths; default to 443 for https
- Catch fatal errors and save a crash report (shown on next launch and written
  to Minamp-error.txt on the SD card)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/com/minamp/plex/Library.java

@@ -36,7 +36,7 @@ public final class Library {
     }
 
     public String recentlyPlayedPath(int size) {
-        return "/library/sections/" + section + "/all?type=9&sort=lastViewedAt:desc&viewCount>>=0" + page(0, size);
+        return "/library/sections/" + section + "/all?type=9&sort=lastViewedAt:desc&viewCount%3E%3E=0" + page(0, size);
     }
 
     public String playlistsPath() {
@@ -84,7 +84,7 @@ public final class Library {
 
     /** Tracks rated four stars or better (and loved tracks), shuffled. */
     public List<Item> topRatedRadio() throws IOException {
-        return server.items("/library/sections/" + section + "/all?type=10&userRating>>=7&sort=random" + page(0, 100));
+        return server.items("/library/sections/" + section + "/all?type=10&userRating%3E%3E=7&sort=random" + page(0, 100));
     }
 
     /** Tracks from albums released in a random decade that the library actually has. */
@@ -172,15 +172,56 @@ public final class Library {
         return server.url(t.partKey);
     }
 
-    /** MP3 transcode over plain progressive HTTP, starting at offsetMs. */
-    public String transcodeUrl(Item t, int kbps, long offsetMs, String session) throws IOException {
+    /**
+     * Plex servers differ in which form of the music transcoder request they accept (some answer
+     * 400 to one and stream fine with another), so there are several known variants. The proxy
+     * tries them in order; the one that worked is remembered and tried first next time.
+     */
+    public static final int VARIANTS = 4;
+    public static volatile int preferredVariant = 0;
+
+    public static int[] variantOrder() {
+        int[] order = new int[VARIANTS];
+        order[0] = preferredVariant;
+        for (int i = 0, k = 1; i < VARIANTS; i++) if (i != preferredVariant) order[k++] = i;
+        return order;
+    }
+
+    /** MP3 transcode URLs over plain progressive HTTP starting at offsetMs, in {@link #variantOrder()} order. */
+    public java.util.List<String> transcodeUrls(Item t, int kbps, long offsetMs, String session) throws IOException {
+        int[] order = variantOrder();
+        java.util.List<String> out = new ArrayList<String>();
+        for (int i = 0; i < order.length; i++) out.add(transcodeUrl(t, kbps, offsetMs, session, order[i]));
+        return out;
+    }
+
+    String transcodeUrl(Item t, int kbps, long offsetMs, String session, int variant) throws IOException {
         if (kbps <= 0) kbps = 320;
-        String profile = "add-transcode-target(type=musicProfile&context=streaming&protocol=http&container=mp3&audioCodec=mp3)"
-                + "+add-limitation(scope=musicCodec&scopeName=mp3&type=upperBound&name=audio.bitrate&value=" + kbps + ")"
-                + "+add-limitation(scope=musicCodec&scopeName=mp3&type=upperBound&name=audio.channels&value=2)";
-        String path = "/music/:/transcode/universal/start.mp3"
+        String target = "add-transcode-target(type=musicProfile&context=streaming&protocol=http&container=mp3&audioCodec=mp3)";
+        String profile;
+        String platform;
+        String base = "/music/:/transcode/universal/start.mp3";
+        switch (variant) {
+            case 0:  // what Plex's own web player identifies as, with an explicit MP3 target
+                platform = "Chrome";
+                profile = target + "+add-limitation(scope=musicCodec&scopeName=*&type=upperBound&name=audio.bitrate&value=" + kbps + ")";
+                break;
+            case 1:  // generic client profile
+                platform = "Generic";
+                profile = target + "+add-limitation(scope=musicCodec&scopeName=mp3&type=upperBound&name=audio.bitrate&value=" + kbps + ")";
+                break;
+            case 2:  // older servers' audio endpoint
+                platform = "Chrome";
+                profile = target;
+                base = "/audio/:/transcode/universal/start.mp3";
+                break;
+            default: // no profile tweaks at all; bitrate from musicBitrate only
+                platform = "Chrome";
+                profile = null;
+        }
+        String path = base
                 + "?path=" + Plex.enc("/library/metadata/" + t.ratingKey)
-                + "&mediaIndex=0&partIndex=0&protocol=http&hasMDE=1&fastSeek=1"
+                + "&mediaIndex=0&partIndex=0&protocol=http&hasMDE=1&fastSeek=1&copyts=1"
                 + "&directPlay=0&directStream=0&directStreamAudio=0"
                 + "&musicBitrate=" + kbps + "&maxAudioBitrate=" + kbps
                 + "&offset=" + (offsetMs / 1000)
@@ -190,9 +231,9 @@ public final class Library {
                 + "&X-Plex-Client-Identifier=" + Plex.enc(Plex.clientId)
                 + "&X-Plex-Product=" + Plex.enc(Plex.product)
                 + "&X-Plex-Version=" + Plex.enc(Plex.version)
-                + "&X-Plex-Platform=Generic"
+                + "&X-Plex-Platform=" + platform
                 + "&X-Plex-Device=" + Plex.enc(Plex.device)
-                + "&X-Plex-Client-Profile-Extra=" + Plex.enc(profile);
+                + (profile != null ? "&X-Plex-Client-Profile-Extra=" + Plex.enc(profile) : "");
         return server.url(path);
     }