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Strengthen rsf check (check for nonzero nibbles), start second channel more precisely

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git-svn-id: https://vgmstream.svn.sourceforge.net/svnroot/vgmstream@61 51a99a44-fe44-0410-b1ba-c3e57ba2b86b
This commit is contained in:
halleyscometsw 2008-04-02 16:07:14 +00:00
parent 75b8dd1045
commit 67f6550ea3
1 changed files with 19 additions and 2 deletions
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21
src/meta/rsf.c
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@ -20,6 +20,23 @@ VGMSTREAM * init_vgmstream_rsf(const char * const filename) {
file_size = get_streamfile_size(infile);
{
/* extra check: G.721 has no zero nibbles, so we look at
* the first few bytes*/
int8_t test_byte;
off_t i;
/* 0x20 is arbitrary, all files are much larger */
for (i=0;i<0x20;i++) {
test_byte = read_8bit(i,infile);
if (!(test_byte&0xf) || !(test_byte&0xf0)) goto fail;
}
/* and also check start of second channel */
for (i=(file_size+1)/2;i<(file_size+1)/2+0x20;i++) {
test_byte = read_8bit(i,infile);
if (!(test_byte&0xf) || !(test_byte&0xf0)) goto fail;
}
}
close_streamfile(infile);
infile = NULL;
@ -29,7 +46,7 @@ VGMSTREAM * init_vgmstream_rsf(const char * const filename) {
if (!vgmstream) goto fail;
/* fill in the vital statistics */
vgmstream->num_samples = file_size/2*2;
vgmstream->num_samples = file_size;
vgmstream->sample_rate = 32000;
vgmstream->coding_type = coding_G721;
@ -46,7 +63,7 @@ VGMSTREAM * init_vgmstream_rsf(const char * const filename) {
vgmstream->ch[i].channel_start_offset=
vgmstream->ch[i].offset=
file_size/2*i;
(file_size+1)/2*i;
g72x_init_state(&(vgmstream->ch[i].g72x_state));