From c5e29938c4c7dfcb1b888bbb3440f8688eb1d165 Mon Sep 17 00:00:00 2001
From: Linus Nielsen Feltzing <linus@haxx.se>
Date: Mon, 28 Oct 2002 00:00:07 +0000
Subject: Fast forward near the end of the last song in a playlist didn't
 activate the DMA if the remaining amount to play was below the watermark

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2754 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/mpeg.c | 63 +++++++++++++++++++++++++++++++--------------------------
 1 file changed, 34 insertions(+), 29 deletions(-)

(limited to 'firmware')

diff --git a/firmware/mpeg.c b/firmware/mpeg.c
index e8fd1acbc7..206e67d3d3 100644
--- a/firmware/mpeg.c
+++ b/firmware/mpeg.c
@@ -841,7 +841,35 @@ void hexdump(unsigned char *buf, int len)
 }
 #endif
 
-static void swap_one_chunk(void)
+static void start_playback_if_ready(void)
+{
+    /* See if we have started playing yet. If not, do it. */
+    if(play_pending || dma_underrun)
+    {
+        /* If the filling has stopped, and we still haven't reached
+           the watermark, the file must be smaller than the
+           watermark. We must still play it. */
+        if(((mp3buf_swapwrite - mp3buf_read) >= MPEG_LOW_WATER) ||
+           !filling)
+        {
+            DEBUGF("P\n");
+            play_pending = false;
+            playing = true;
+			
+            init_dma();
+            if (!paused)
+            {
+                last_dma_tick = current_tick;
+                start_dma();
+            }
+
+            /* Tell ourselves that we need more data */
+            queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
+        }
+    }
+}
+
+static bool swap_one_chunk(void)
 {
     int free_space_left;
     int amount_to_swap;
@@ -849,7 +877,7 @@ static void swap_one_chunk(void)
     free_space_left = get_unswapped_space();
 
     if(free_space_left == 0 && !play_pending)
-        return;
+        return false;
 
     /* Swap in larger chunks when the user is waiting for the playback
        to start */
@@ -873,31 +901,7 @@ static void swap_one_chunk(void)
         mp3buf_swapwrite = 0;
     }
 
-    /* And while we're at it, see if we have started
-       playing yet. If not, do it. */
-    if(play_pending || dma_underrun)
-    {
-        /* If the filling has stopped, and we still haven't reached
-           the watermark, the file must be smaller than the
-           watermark. We must still play it. */
-        if(((mp3buf_swapwrite - mp3buf_read) >= MPEG_LOW_WATER) ||
-           !filling)
-        {
-            DEBUGF("P\n");
-            play_pending = false;
-            playing = true;
-			
-            init_dma();
-            if (!paused)
-            {
-                last_dma_tick = current_tick;
-                start_dma();
-            }
-
-            /* Tell ourselves that we need more data */
-            queue_post(&mpeg_queue, MPEG_NEED_DATA, 0);
-        }
-    }
+    return true;
 }
 
 static void mpeg_thread(void)
@@ -922,9 +926,8 @@ static void mpeg_thread(void)
         yield();
 
         /* Swap if necessary, and don't block on the queue_wait() */
-        if(get_unswapped_space())
+        if(swap_one_chunk())
         {
-            swap_one_chunk();
             queue_wait_w_tmo(&mpeg_queue, &ev, 0);
         }
         else
@@ -933,6 +936,8 @@ static void mpeg_thread(void)
                    mp3buf_read, mp3buf_write, mp3buf_swapwrite);
             queue_wait(&mpeg_queue, &ev);
         }
+
+        start_playback_if_ready();
         
         switch(ev.id)
         {
-- 
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