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Fixed ff/rew new position calculation to handle large seek positions and files. This should remove any restrictions on CBR files. VBR files can now seek to ~12 hours (TODO: remove this limit). Also fixed small bug in elapsed time calculation after resume.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2073 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Hardeep Sidhu 2002-08-30 07:07:57 +00:00
parent 87f53249b2
commit 98cb63629b
1 changed files with 8 additions and 8 deletions
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14
firmware/mpeg.c
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@ -286,7 +286,7 @@ static void set_elapsed(struct mp3entry* id3)
/* calculate remainder time */
plen = (nextpos - relpos) * (id3->filesize / 256);
id3->elapsed += remainder * 1000 / plen ;
id3->elapsed += (((remainder * 100) / plen) * id3->length) / 10000;
}
else {
/* no TOC exists. set a rough estimate using average bitrate */
@ -922,8 +922,8 @@ static void mpeg_thread(void)
case MPEG_FF_REWIND: {
struct mp3entry *id3 = mpeg_current_track();
int oldtime = id3->elapsed;
int newtime = oldtime + (int)ev.data;
unsigned int oldtime = id3->elapsed;
unsigned int newtime = oldtime + (int)ev.data;
int curpos, newpos, diffpos;
DEBUGF("MPEG_FF_REWIND\n");
@ -933,7 +933,7 @@ static void mpeg_thread(void)
{
/* Use the TOC to find the new position */
unsigned int percent, remainder;
int curtoc, nexttoc, nextpos;
int curtoc, nexttoc, plen;
percent = (newtime*100)/id3->length;
if (percent > 99)
@ -951,11 +951,11 @@ static void mpeg_thread(void)
/* Use the remainder to get a more accurate position */
remainder = (newtime*100)%id3->length;
remainder = (remainder*100)/id3->length;
nextpos = (id3->filesize/256)*nexttoc;
newpos += ((nextpos-newpos)*remainder)/100;
plen = (nexttoc - curtoc)*(id3->filesize/256);
newpos += (plen/100)*remainder;
}
else if (id3->bpf && id3->tpf)
newpos = (newtime*id3->bpf)/id3->tpf;
newpos = (newtime/id3->tpf)*id3->bpf;
else
{
/* Not enough information to FF/Rewind */