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Some small fixes for playback: (1) Always fill up to the high watermark. (2) A bit more robust id3v1 skipping.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6529 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2005-05-27 21:46:44 +00:00
parent 60d9d4b2ab
commit ef32881e96
1 changed files with 24 additions and 12 deletions
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36
firmware/mpeg.c
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@ -1397,7 +1397,7 @@ static void mpeg_thread(void)
/* We interpret 0 as "empty buffer" */
if(free_space_left <= 0)
free_space_left = audiobuflen + free_space_left;
free_space_left += audiobuflen;
unplayed_space_left = audiobuflen - free_space_left;
@ -1405,7 +1405,7 @@ static void mpeg_thread(void)
free_space_left -= MPEG_HIGH_WATER;
/* do we have any more buffer space to fill? */
if(free_space_left <= MPEG_HIGH_WATER)
if(free_space_left <= 0)
{
DEBUGF("0\n");
filling = false;
@ -1421,7 +1421,8 @@ static void mpeg_thread(void)
amount_to_read = free_space_left;
/* Don't read more than until the end of the buffer */
amount_to_read = MIN(audiobuflen - audiobuf_write, amount_to_read);
amount_to_read = MIN(audiobuflen - audiobuf_write,
amount_to_read);
#if MEM == 8
amount_to_read = MIN(0x100000, amount_to_read);
#endif /* #if MEM == 8 */
@ -1434,7 +1435,8 @@ static void mpeg_thread(void)
{
DEBUGF("R\n");
t1 = current_tick;
len = read(mpeg_file, audiobuf+audiobuf_write, amount_to_read);
len = read(mpeg_file, audiobuf + audiobuf_write,
amount_to_read);
if(len > 0)
{
t2 = current_tick;
@ -1445,10 +1447,15 @@ static void mpeg_thread(void)
data */
if (len < amount_to_read)
{
int tagptr = audiobuf_write + len - 128;
int i;
char *tag = "TAG";
static const unsigned char tag[] = "TAG";
int taglen = 128;
int tagptr = audiobuf_write + len - 128;
/* Really rare case: entire potential tag wasn't
read in this call AND audiobuf_write < 128 */
if (tagptr < 0)
tagptr += audiobuflen;
for(i = 0;i < 3;i++)
{
@ -1456,7 +1463,10 @@ static void mpeg_thread(void)
tagptr -= audiobuflen;
if(audiobuf[tagptr] != tag[i])
{
taglen = 0;
break;
}
tagptr++;
}
@ -1467,16 +1477,18 @@ static void mpeg_thread(void)
DEBUGF("Skipping ID3v1 tag\n");
len -= taglen;
/* The very rare case when the entire tag
wasn't read in this read() call must be
taken care of */
if(len < 0)
len = 0;
/* In the very rare case when the entire tag
wasn't read in this read() len will be < 0.
Take care of this when changing the write
pointer. */
}
}
audiobuf_write += len;
if (audiobuf_write < 0)
audiobuf_write += audiobuflen;
if(audiobuf_write >= audiobuflen)
{
audiobuf_write = 0;