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Attempt to load truncated wav files. Because everything else does. And then people complain that its a bug. But do warn (just clamp chunk length).

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@3337 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2009-07-27 07:38:11 +00:00
parent fab8161e68
commit fb95c21dcd
1 changed files with 44 additions and 23 deletions
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67
engine/client/snd_mem.c
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@ -943,7 +943,7 @@ int GetLittleLong(void)
return val;
}
void FindNextChunk(char *name)
unsigned int FindNextChunk(char *name)
{
unsigned int dataleft;
@ -953,18 +953,29 @@ void FindNextChunk(char *name)
if (dataleft < 8)
{ // didn't find the chunk
data_p = NULL;
return;
return 0;
}
data_p=last_chunk;
data_p += 4;
dataleft-= 8;
iff_chunk_len = GetLittleLong();
if (iff_chunk_len < 0 || iff_chunk_len > dataleft)
if (iff_chunk_len < 0)
{
data_p = NULL;
return;
return 0;
}
if (iff_chunk_len > dataleft)
{
Con_Printf ("Sound file seems truncated by %i bytes\n", iff_chunk_len-dataleft);
#if 1
iff_chunk_len = dataleft;
#else
data_p = NULL;
return 0;
#endif
}
dataleft-= iff_chunk_len;
// if (iff_chunk_len > 1024*1024)
// Sys_Error ("FindNextChunk: %i length is past the 1 meg sanity limit", iff_chunk_len);
@ -973,14 +984,14 @@ void FindNextChunk(char *name)
if ((iff_chunk_len&1) && dataleft)
last_chunk++;
if (!Q_strncmp(data_p, name, 4))
return;
return iff_chunk_len;
}
}
void FindChunk(char *name)
unsigned int FindChunk(char *name)
{
last_chunk = iff_data;
FindNextChunk (name);
return FindNextChunk (name);
}
@ -1013,6 +1024,7 @@ wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
int i;
int format;
int samples;
int chunklen;
memset (&info, 0, sizeof(info));
@ -1023,10 +1035,10 @@ wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
iff_end = wav + wavlength;
// find "RIFF" chunk
FindChunk("RIFF");
if (!(data_p && !Q_strncmp(data_p+8, "WAVE", 4)))
chunklen = FindChunk("RIFF");
if (chunklen < 4 || Q_strncmp(data_p+8, "WAVE", 4))
{
Con_Printf("Missing RIFF/WAVE chunks\n");
Con_Printf("Missing RIFF/WAVE chunks in %s\n", name);
return info;
}
@ -1034,10 +1046,10 @@ wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
iff_data = data_p + 12;
// DumpChunks ();
FindChunk("fmt ");
if (!data_p)
chunklen = FindChunk("fmt ");
if (chunklen < 24-8)
{
Con_Printf("Missing fmt chunk\n");
Con_Printf("Missing/truncated fmt chunk\n");
return info;
}
data_p += 8;
@ -1054,16 +1066,16 @@ wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
info.width = GetLittleShort() / 8;
// get cue chunk
FindChunk("cue ");
if (data_p)
chunklen = FindChunk("cue ");
if (chunklen >= 36-8)
{
data_p += 32;
info.loopstart = GetLittleLong();
// Con_Printf("loopstart=%d\n", sfx->loopstart);
// if the next chunk is a LIST chunk, look for a cue length marker
FindNextChunk ("LIST");
if (data_p)
chunklen = FindNextChunk ("LIST");
if (chunklen >= 32-8)
{
if (!strncmp (data_p + 28, "mark", 4))
{ // this is not a proper parse, but it works with cooledit...
@ -1078,24 +1090,33 @@ wavinfo_t GetWavinfo (char *name, qbyte *wav, int wavlength)
info.loopstart = -1;
// find data chunk
FindChunk("data");
if (!data_p)
chunklen = FindChunk("data");
if (!chunklen)
{
Con_Printf("Missing data chunk\n");
Con_Printf("Missing data chunk in %s\n", name);
return info;
}
data_p += 4;
samples = GetLittleLong () / info.width /info.numchannels;
data_p += 8;
samples = chunklen / info.width /info.numchannels;
if (info.samples)
{
if (samples < info.samples)
Sys_Error ("Sound %s has a bad loop length", name);
{
info.samples = samples;
Con_Printf ("Sound %s has a bad loop length\n", name);
}
}
else
info.samples = samples;
if (info.loopstart > info.samples)
{
Con_Printf ("Sound %s has a bad loop start\n", name);
info.loopstart = info.samples;
}
info.dataofs = data_p - wav;
return info;