input/qobuz: add setting "format_id"

doc/user.xml

@@ -2429,6 +2429,20 @@ run</programlisting>
                   The Qobuz password.
                 </entry>
               </row>
+
+              <row>
+                <entry>
+                  <varname>format_id</varname>
+                  <parameter>N</parameter>
+                </entry>
+                <entry>
+                  The <ulink
+                  url="https://github.com/Qobuz/api-documentation/blob/master/endpoints/track/getFileUrl.md#parameters">Qobuz
+                  format identifier</ulink>, i.e. a number which
+                  chooses the format and quality to be requested from
+                  Qobuz.  The default is "5" (320 kbit/s MP3).
+                </entry>
+              </row>
             </tbody>
           </tgroup>
         </informaltable>

src/input/plugins/QobuzClient.cxx

@@ -52,10 +52,12 @@ QobuzClient::QobuzClient(EventLoop &event_loop,
 			 const char *_app_id, const char *_app_secret,
 			 const char *_device_manufacturer_id,
 			 const char *_username, const char *_email,
-			 const char *_password)
+			 const char *_password,
+			 const char *_format_id)
 	:base_url(_base_url), app_id(_app_id), app_secret(_app_secret),
 	 device_manufacturer_id(_device_manufacturer_id),
 	 username(_username), email(_email), password(_password),
+	 format_id(_format_id),
 	 curl(event_loop),
 	 defer_invoke_handlers(event_loop, BIND_THIS_METHOD(InvokeHandlers))
 {

src/input/plugins/QobuzClient.hxx

@@ -45,6 +45,7 @@ class QobuzClient final : QobuzLoginHandler {
 	const char *const app_id, *const app_secret;
 	const char *const device_manufacturer_id;
 	const char *const username, *const email, *const password;
+	const char *const format_id;
 
 	CurlInit curl;
 
@@ -72,7 +73,12 @@ public:
 		    const char *_app_id, const char *_app_secret,
 		    const char *_device_manufacturer_id,
 		    const char *_username, const char *_email,
-		    const char *_password);
+		    const char *_password,
+		    const char *_format_id);
+
+	const char *GetFormatId() const noexcept {
+		return format_id;
+	}
 
 	gcc_pure
 	CurlGlobal &GetCurl() noexcept;

src/input/plugins/QobuzInputPlugin.cxx

@@ -148,10 +148,13 @@ InitQobuzInput(EventLoop &event_loop, const ConfigBlock &block)
 	if (password == nullptr)
 		throw PluginUnavailable("No Qobuz password configured");
 
+	const char *format_id = block.GetBlockValue("format_id", "5");
+
 	qobuz_client = new QobuzClient(event_loop, base_url,
 				       app_id, app_secret,
 				       device_manufacturer_id,
-				       username, email, password);
+				       username, email, password,
+				       format_id);
 }
 
 static void

src/input/plugins/QobuzTrackRequest.cxx

@@ -70,7 +70,7 @@ MakeTrackUrl(QobuzClient &client, const char *track_id)
 	return client.MakeSignedUrl("track", "getFileUrl",
 				    {
 					    {"track_id", track_id},
-					    {"format_id", "5"},
+					    {"format_id", client.GetFormatId()},
 				    });
 }