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properly check aiff playMode before deciding to use it for loop

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this loop support may never be useful, bah


git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@269 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw 2008-07-01 16:27:27 +00:00
parent c566ee6f4b
commit ea9aad22e1
1 changed files with 19 additions and 17 deletions
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36
src/meta/aifc.c
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@ -230,24 +230,26 @@ VGMSTREAM * init_vgmstream_aifc(STREAMFILE *streamFile) {
int start_marker; int start_marker;
int end_marker; int end_marker;
/* use the sustain loop */ /* use the sustain loop */
start_marker = read_16bitBE(InstrumentChunkOffset+18,streamFile); /* if playMode=ForwardLooping */
end_marker = read_16bitBE(InstrumentChunkOffset+20,streamFile); if (read_16bitBE(InstrumentChunkOffset+16,streamFile) == 1) {
/* check for sustain markers != 0 (invalid marker no) */ start_marker = read_16bitBE(InstrumentChunkOffset+18,streamFile);
/* There is a PlayMode flag, but 3DO games don't seem to use it */ end_marker = read_16bitBE(InstrumentChunkOffset+20,streamFile);
if (start_marker && end_marker) { /* check for sustain markers != 0 (invalid marker no) */
/* find start marker */ if (start_marker && end_marker) {
loop_start = find_marker(streamFile,MarkerChunkOffset,start_marker); /* find start marker */
loop_end = find_marker(streamFile,MarkerChunkOffset,end_marker); loop_start = find_marker(streamFile,MarkerChunkOffset,start_marker);
loop_end = find_marker(streamFile,MarkerChunkOffset,end_marker);
/* find_marker is type uint32_t as the spec says that's the type /* find_marker is type uint32_t as the spec says that's the type
* of the position value, but it returns a -1 on error, and the * of the position value, but it returns a -1 on error, and the
* loop_start and loop_end variables are int32_t, so the error * loop_start and loop_end variables are int32_t, so the error
* will become apparent. * will become apparent.
* We shouldn't have a loop point that overflows an int32_t * We shouldn't have a loop point that overflows an int32_t
* anyway. */ * anyway. */
printf("%d %d\n",loop_start,loop_end); printf("%d %d\n",loop_start,loop_end);
if (loop_start >= 0 && loop_end >= 0) loop_flag = 1; if (loop_start >= 0 && loop_end >= 0) loop_flag = 1;
if (loop_start==loop_end) loop_flag = 0; if (loop_start==loop_end) loop_flag = 0;
}
} }
} }