Add "cd next" and "cd prev" commands. Add a new "-cd" option , which in combination with "-dedicated", allows QS to be a stand-alone cd player... Useful\!

git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@283 af15c1b1-3010-417e-b628-4374ebc0bcbd

Quake/cd_sdl.c

@@ -92,6 +92,9 @@ void CDAudio_Play(byte track, qboolean looping)
 			return;
 	}
 
+	if (track == 0)
+		track = 1;
+
 	track = remap[track];
 
 	if (track < 1 || track > cd_handle->numtracks)
@@ -160,6 +163,45 @@ void CDAudio_Stop(void)
 	endOfTrack = -1.0;
 }
 
+void CDAudio_Next(void)
+{
+	byte track;
+
+	if (!cd_handle || !enabled)
+		return;
+
+	if (!playing)
+		return;
+
+        // track = cd_handle->cur_track;
+        // Seems not implemented
+        track = playTrack;
+	track++;
+	if (track > cd_handle->numtracks)
+		track = 1;
+
+	CDAudio_Play (track, playLooping );
+}
+
+void CDAudio_Prev(void)
+{
+	byte track;
+
+	if (!cd_handle || !enabled)
+		return;
+
+	if (!playing)
+		return;
+
+        track = playTrack;
+	track--;
+
+        if (track == 0)
+		track = cd_handle->numtracks;
+
+	CDAudio_Play (track,playLooping);
+}
+
 void CDAudio_Pause(void)
 {
 	if (!cd_handle || !enabled)
@@ -290,6 +332,18 @@ static void CD_f (void)
 		return;
 	}
 
+	if (Q_strcasecmp(command, "next") == 0)
+	{
+		CDAudio_Next();
+		return;
+	}
+
+	if (Q_strcasecmp(command, "prev") == 0)
+	{
+		CDAudio_Prev();
+		return;
+	}
+
 	if (Q_strcasecmp(command, "eject") == 0)
 	{
 		if (playing)

Quake/host.c

@@ -861,6 +861,13 @@ void Host_Init (quakeparms_t *parms)
 		// note: two leading newlines because the command buffer swallows one of them.
 		Cbuf_AddText ("\n\nvid_unlock\n");
 	}
+	else if (COM_CheckParm ("-cd"))
+	{
+		// Allow "qs -dedicated -cd" to work as a standalone cd player ;>
+		// Useful, because of ubiquitous nature of SDL
+		S_Init ();
+		CDAudio_Init ();
+	}
 
 	Hunk_AllocName (0, "-HOST_HUNKLEVEL-");
 	host_hunklevel = Hunk_LowMark ();
@@ -915,6 +922,12 @@ void Host_Shutdown(void)
 		IN_Shutdown (); // input is only initialized in Host_Init if we're not dedicated -- kristian
 		VID_Shutdown();
 	}
+	else if (COM_CheckParm ("-cd"))
+	{
+		CDAudio_Shutdown ();
+		S_Shutdown ();
+	}
+
 	LOG_Close ();
 }