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Support wide chars when searching for music tags (MP3)

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This commit is contained in:
mazmazz 2018-08-18 15:22:15 -04:00
parent 76c4f5dd5c
commit f4a574aba2
1 changed files with 56 additions and 1 deletions
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57
src/sdl/mixer_sound.c
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@ -701,10 +701,17 @@ boolean I_StartDigSong(const char *musicname, boolean looping)
const char *key2 = "POINT=";
const char *key3 = "MS=";
const char *key4 = "LENGTHMS=";
const char *key1w = "L\0O\0O\0P\0";
const char *key2w = "P\0O\0I\0N\0T\0=\0";
const char *key3w = "M\0S\0=\0";
const char *key4w = "L\0E\0N\0G\0T\0H\0M\0S\0=\0";
const char *wterm = "\0\0";
const size_t key1len = strlen(key1);
const size_t key2len = strlen(key2);
const size_t key3len = strlen(key3);
const size_t key4len = strlen(key4);
char wval[10]; // millisecond range up to 30 hours!
size_t wstart, wp;
char *p = data;
while ((UINT32)(p - data) < len)
{
@ -732,8 +739,56 @@ boolean I_StartDigSong(const char *musicname, boolean looping)
p += key4len; // skip LENGTHMS
music_length = (float)(atoi(p) / 1000.0L);
}
// below: search MP3 or other tags that use wide char encoding
else if (!loop_point && !strncmp(p, key1w, key1len*2)) // LOOP wide char
{
p += key1len*2;
if (!strncmp(p, key2w, key2len*2)) // POINT= wide char
{
p += key2len*2+2;
wstart = (size_t)p;
wp = 0;
while (wp < 9 && strncmp(p, wterm, 2))
{
wval[wp] = *p;
p += 2;
wp = ((size_t)(p-wstart))/2;
}
wval[min(wp, 9)] = 0;
loop_point = (float)((44.1L+atoi(wval) / 44100.0L));
}
else if (!strncmp(p, key3w, key3len*2)) // MS= wide char
{
p += key3len*2+2;
wstart = (size_t)p;
wp = 0;
while (wp < 9 && strncmp(p, wterm, 2))
{
wval[wp] = *p;
p += 2;
wp = ((size_t)(p-wstart))/2;
}
wval[min(wp, 9)] = 0;
loop_point = (float)(atoi(wval) / 1000.0L);
}
}
else if (!music_length && !strncmp(p, key4w, key4len*2)) // LENGTHMS= wide char
{
p += key4len*2+2;
wstart = (size_t)p;
wp = 0;
while (wp < 9 && strncmp(p, wterm, 2))
{
wval[wp] = *p;
p += 2;
wp = ((size_t)(p-wstart))/2;
}
wval[min(wp, 9)] = 0;
music_length = (float)(atoi(wval) / 1000.0L);
}
if (loop_point && music_length) // Got what we needed
if (loop_point && music_length && music_length > loop_point) // Got what we needed
// the last case is a sanity check, in case the wide char searches were false matches.
break;
else // continue searching
p++;