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Buffer underrun handling

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2544 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-10-09 09:15:28 +00:00
parent 746501f552
commit 26e7ec4787
1 changed files with 17 additions and 5 deletions
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22
firmware/mpeg.c
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@ -54,6 +54,7 @@ extern void bitswap(unsigned char *data, int length);
#define MPEG_NEED_DATA 100
#define MPEG_SWAP_DATA 101
#define MPEG_TRACK_CHANGE 102
#define MPEG_DMA_UNDERRUN 103
extern char* playlist_peek(int steps);
extern int playlist_next(int steps);
@ -440,7 +441,7 @@ static void mas_poll_start(int interval_in_ms)
{
unsigned int count;
count = FREQ / 1000 / 8 * interval_in_ms;
count = (FREQ * interval_in_ms) / 1000 / 8;
if(count > 0xffff)
{
@ -639,10 +640,17 @@ void DEI3(void)
else
{
DEBUGF("No more MP3 data. Stopping.\n");
queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
CHCR3 = 0; /* Stop DMA interrupt */
playing = false;
is_playing = false;
/* Check if the end of data is because of a hard disk error */
if(filling)
queue_post(&mpeg_queue, MPEG_DMA_UNDERRUN, 0);
else
{
queue_post(&mpeg_queue, MPEG_TRACK_CHANGE, 0);
playing = false;
is_playing = false;
}
CHCR3 &= ~0x0001; /* Disable the DMA interrupt */
}
}
@ -1357,6 +1365,10 @@ static void mpeg_thread(void)
track_change();
break;
case MPEG_DMA_UNDERRUN:
CHCR3 |= 0x0001; /* Enable the DMA interrupt */
break;
case SYS_USB_CONNECTED:
stop_playing();
#ifndef SIMULATOR