modified the playlist system slightly:

playlist_peek() returns info relative the current index
playlist_next() advances the index back or forth

(this breaks the build, mpeg fixes are pending)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2022 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 21 insertions, 10 deletions

diff --git a/apps/playlist.c b/apps/playlist.c
index 0052672..3dbbc9e 100644
--- a/apps/playlist.c
+++ b/apps/playlist.c
@@ -64,7 +64,19 @@ int playlist_add(char *filename)
     return 0;
 }
 
-char* playlist_next(int steps, int* index)
+int playlist_next(int steps)
+{
+    playlist.index = (playlist.index+steps) % playlist.amount;
+    while ( playlist.index < 0 ) {
+        if ( global_settings.loop_playlist )
+            playlist.index += playlist.amount;
+        else
+            playlist.index = 0;
+    }
+    return playlist.index;
+}
+
+char* playlist_peek(int steps)
 {
     int seek;
     int max;
@@ -73,19 +85,20 @@ char* playlist_next(int steps, int* index)
     char *buf;
     char dir_buf[MAX_PATH+1];
     char *dir_end;
+    int index;
 
     if(abs(steps) > playlist.amount)
         /* prevent madness when all files are empty/bad */
         return NULL;
 
-    playlist.index = (playlist.index+steps) % playlist.amount;
-    while ( playlist.index < 0 ) {
+    index = (playlist.index+steps) % playlist.amount;
+    while ( index < 0 ) {
         if ( global_settings.loop_playlist )
-            playlist.index += playlist.amount;
+            index += playlist.amount;
         else
-            playlist.index = 0;
+            index = 0;
     }
-    seek = playlist.indices[playlist.index];
+    seek = playlist.indices[index];
 
     if(playlist.in_ram)
     {
@@ -106,9 +119,6 @@ char* playlist_next(int steps, int* index)
             return NULL;
     }
 
-    if (index)
-        *index = playlist.index;
-
     /* Zero-terminate the file name */
     seek=0;
     while((buf[seek] != '\n') &&
diff --git a/apps/playlist.h b/apps/playlist.h
index 5abeec3..a18240d 100644
--- a/apps/playlist.h
+++ b/apps/playlist.h
@@ -42,7 +42,8 @@ extern bool playlist_shuffle;
 
 int play_list(char *dir, char *file, int start_index, 
               bool shuffled_index, int start_offset, int random_seed );
-char* playlist_next(int steps, int* id);
+char* playlist_peek(int steps);
+int playlist_next(int steps);
 void randomise_playlist( unsigned int seed );
 void sort_playlist(bool start_current);
 void empty_playlist(void);