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snd_umx: minor update from umr. minor correction to fshandle offset. 

git-svn-id: http://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@893 af15c1b1-3010-417e-b628-4374ebc0bcbd
This commit is contained in:
sezero 2014-02-11 20:00:35 +00:00
parent 769f1ed414
commit 7cb7440f3d
1 changed files with 24 additions and 18 deletions
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42
Quake/snd_umx.c
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@ -34,13 +34,19 @@
#include "snd_codeci.h"
#include "snd_umx.h"
typedef int32_t fci_t; /* FCompactIndex */
#define UPKG_HDR_TAG 0x9e2a83c1
#pragma pack(1)
struct _genhist { /* for upkg versions >= 68 */
int32_t export_count;
int32_t name_count;
};
struct upkg_hdr {
uint32_t tag; /* UPKG_HDR_TAG */
int32_t file_version; /* 61 for original unreal */
int32_t pkg_flags; /* bitflags - none needed */
int32_t file_version;
uint32_t pkg_flags;
int32_t name_count; /* number of names in name table (>= 0) */
int32_t name_offset; /* offset to name table (>= 0) */
int32_t export_count; /* num. exports in export table (>= 0) */
@ -52,18 +58,15 @@ struct upkg_hdr {
* only with versions < 68. */
int32_t heritage_count;
int32_t heritage_offset;
#if 0
/* with versions >= 68: a GUID, a dword for generation count
* and export_count and name_count dwords for each generation: */
uint32_t guid[4];
int32_t generation_count;
struct _genhist {
int32_t export_count;
int32_t name_count;
} genhist[0/* generation_count */];
#endif
#define UPKG_HDR_SIZE 64 /* 64 bytes up until here */
/*struct _genhist *gen;*/
};
#pragma pack()
/*COMPILE_TIME_ASSERT(upkg_hdr, offsetof(struct upkg_hdr, gen) == UPKG_HDR_SIZE);*/
COMPILE_TIME_ASSERT(upkg_hdr, sizeof(struct upkg_hdr) == UPKG_HDR_SIZE);
#define UMUSIC_IT 0
#define UMUSIC_S3M 1
@ -77,10 +80,13 @@ static const char *mustype[] = {
"WAV", "MP2", NULL
};
/* decode an FCompactIndex. original documentation by Tim Sweeney
* was at http://unreal.epicgames.com/Packages.htm
/* decode an FCompactIndex.
* original documentation by Tim Sweeney was at
* http://unreal.epicgames.com/Packages.htm
* also see Unreal Wiki:
* http://wiki.beyondunreal.com/Legacy:Package_File_Format/Data_Details
*/
static int32_t get_fci (const char *in, int *pos)
static fci_t get_fci (const char *in, int *pos)
{
int32_t a;
int size;
@ -228,7 +234,7 @@ static int probe_umx (fshandle_t *f, const struct upkg_hdr *hdr,
char buf[64];
idx = 0;
fsiz = f->length;
fsiz = FS_filelength (f);
/* Find the offset and size of the first IT, S3M or XM
* by parsing the exports table. The umx files should
@ -278,7 +284,7 @@ static int32_t probe_header (void *header)
/* byte swap the header - all members are 32 bit LE values */
p = (unsigned char *) header;
swp = (uint32_t *) header;
for (i = 0; i < (int)sizeof(struct upkg_hdr)/4; i++, p += 4) {
for (i = 0; i < UPKG_HDR_SIZE/4; i++, p += 4) {
swp[i] = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
}
@ -319,9 +325,9 @@ static int32_t probe_header (void *header)
static int process_upkg (fshandle_t *f, int32_t *ofs, int32_t *objsize)
{
char header[64];
char header[UPKG_HDR_SIZE];
if (FS_fread(header, 1, 64, f) < 64)
if (FS_fread(header, 1, UPKG_HDR_SIZE, f) < UPKG_HDR_SIZE)
return -1;
if (probe_header(header) < 0)
return -1;
@ -352,7 +358,7 @@ static qboolean S_UMX_CodecOpenStream (snd_stream_t *stream)
Con_DPrintf("%s: %s data @ 0x%x, %d bytes\n", stream->name, mustype[type], ofs, size);
/* hack the fshandle_t start pos and length members so
* that only the relevant data is accessed from now on */
stream->fh.start = ofs;
stream->fh.start += ofs;
stream->fh.length = size;
FS_fseek(&stream->fh, 0, SEEK_SET);