342 lines
6.5 KiB
C
342 lines
6.5 KiB
C
/*
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
// snd_mem.c: sound caching
|
|
|
|
#include "quakedef.h"
|
|
|
|
int cache_full_cycle;
|
|
|
|
byte *S_Alloc (int size);
|
|
|
|
/*
|
|
================
|
|
ResampleSfx
|
|
================
|
|
*/
|
|
void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
|
|
{
|
|
int outcount;
|
|
int srcsample;
|
|
float stepscale;
|
|
int i;
|
|
int sample, samplefrac, fracstep;
|
|
sfxcache_t *sc;
|
|
|
|
sc = Cache_Check (&sfx->cache);
|
|
if (!sc)
|
|
return;
|
|
|
|
stepscale = (float)inrate / shm->speed; // this is usually 0.5, 1, or 2
|
|
|
|
outcount = sc->length / stepscale;
|
|
sc->length = outcount;
|
|
if (sc->loopstart != -1)
|
|
sc->loopstart = sc->loopstart / stepscale;
|
|
|
|
sc->speed = shm->speed;
|
|
if (loadas8bit.value)
|
|
sc->width = 1;
|
|
else
|
|
sc->width = inwidth;
|
|
sc->stereo = 0;
|
|
|
|
// resample / decimate to the current source rate
|
|
|
|
if (stepscale == 1 && inwidth == 1 && sc->width == 1)
|
|
{
|
|
// fast special case
|
|
for (i=0 ; i<outcount ; i++)
|
|
((signed char *)sc->data)[i]
|
|
= (int)( (unsigned char)(data[i]) - 128);
|
|
}
|
|
else
|
|
{
|
|
// general case
|
|
samplefrac = 0;
|
|
fracstep = stepscale*256;
|
|
for (i=0 ; i<outcount ; i++)
|
|
{
|
|
srcsample = samplefrac >> 8;
|
|
samplefrac += fracstep;
|
|
if (inwidth == 2)
|
|
sample = LittleShort ( ((short *)data)[srcsample] );
|
|
else
|
|
sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
|
|
if (sc->width == 2)
|
|
((short *)sc->data)[i] = sample;
|
|
else
|
|
((signed char *)sc->data)[i] = sample >> 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
//=============================================================================
|
|
|
|
/*
|
|
==============
|
|
S_LoadSound
|
|
==============
|
|
*/
|
|
sfxcache_t *S_LoadSound (sfx_t *s)
|
|
{
|
|
char namebuffer[256];
|
|
byte *data;
|
|
wavinfo_t info;
|
|
int len;
|
|
float stepscale;
|
|
sfxcache_t *sc;
|
|
byte stackbuf[1*1024]; // avoid dirtying the cache heap
|
|
|
|
// see if still in memory
|
|
sc = Cache_Check (&s->cache);
|
|
if (sc)
|
|
return sc;
|
|
|
|
//Con_Printf ("S_LoadSound: %x\n", (int)stackbuf);
|
|
// load it in
|
|
Q_strcpy(namebuffer, "sound/");
|
|
Q_strcat(namebuffer, s->name);
|
|
|
|
// Con_Printf ("loading %s\n",namebuffer);
|
|
|
|
data = COM_LoadStackFile(namebuffer, stackbuf, sizeof(stackbuf));
|
|
|
|
if (!data)
|
|
{
|
|
Con_Printf ("Couldn't load %s\n", namebuffer);
|
|
return NULL;
|
|
}
|
|
|
|
info = GetWavinfo (s->name, data, com_filesize);
|
|
if (info.channels != 1)
|
|
{
|
|
Con_Printf ("%s is a stereo sample\n",s->name);
|
|
return NULL;
|
|
}
|
|
|
|
stepscale = (float)info.rate / shm->speed;
|
|
len = info.samples / stepscale;
|
|
|
|
len = len * info.width * info.channels;
|
|
|
|
sc = Cache_Alloc ( &s->cache, len + sizeof(sfxcache_t), s->name);
|
|
if (!sc)
|
|
return NULL;
|
|
|
|
sc->length = info.samples;
|
|
sc->loopstart = info.loopstart;
|
|
sc->speed = info.rate;
|
|
sc->width = info.width;
|
|
sc->stereo = info.channels;
|
|
|
|
ResampleSfx (s, sc->speed, sc->width, data + info.dataofs);
|
|
|
|
return sc;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
===============================================================================
|
|
|
|
WAV loading
|
|
|
|
===============================================================================
|
|
*/
|
|
|
|
|
|
byte *data_p;
|
|
byte *iff_end;
|
|
byte *last_chunk;
|
|
byte *iff_data;
|
|
int iff_chunk_len;
|
|
|
|
|
|
short GetLittleShort(void)
|
|
{
|
|
short val = 0;
|
|
val = *data_p;
|
|
val = val + (*(data_p+1)<<8);
|
|
data_p += 2;
|
|
return val;
|
|
}
|
|
|
|
int GetLittleLong(void)
|
|
{
|
|
int val = 0;
|
|
val = *data_p;
|
|
val = val + (*(data_p+1)<<8);
|
|
val = val + (*(data_p+2)<<16);
|
|
val = val + (*(data_p+3)<<24);
|
|
data_p += 4;
|
|
return val;
|
|
}
|
|
|
|
void FindNextChunk(char *name)
|
|
{
|
|
while (1)
|
|
{
|
|
data_p=last_chunk;
|
|
|
|
if (data_p >= iff_end)
|
|
{ // didn't find the chunk
|
|
data_p = NULL;
|
|
return;
|
|
}
|
|
|
|
data_p += 4;
|
|
iff_chunk_len = GetLittleLong();
|
|
if (iff_chunk_len < 0)
|
|
{
|
|
data_p = NULL;
|
|
return;
|
|
}
|
|
// if (iff_chunk_len > 1024*1024)
|
|
// Sys_Error ("FindNextChunk: %i length is past the 1 meg sanity limit", iff_chunk_len);
|
|
data_p -= 8;
|
|
last_chunk = data_p + 8 + ( (iff_chunk_len + 1) & ~1 );
|
|
if (!Q_strncmp(data_p, name, 4))
|
|
return;
|
|
}
|
|
}
|
|
|
|
void FindChunk(char *name)
|
|
{
|
|
last_chunk = iff_data;
|
|
FindNextChunk (name);
|
|
}
|
|
|
|
|
|
void DumpChunks(void)
|
|
{
|
|
char str[5];
|
|
|
|
str[4] = 0;
|
|
data_p=iff_data;
|
|
do
|
|
{
|
|
memcpy (str, data_p, 4);
|
|
data_p += 4;
|
|
iff_chunk_len = GetLittleLong();
|
|
Con_Printf ("0x%x : %s (%d)\n", (int)(data_p - 4), str, iff_chunk_len);
|
|
data_p += (iff_chunk_len + 1) & ~1;
|
|
} while (data_p < iff_end);
|
|
}
|
|
|
|
/*
|
|
============
|
|
GetWavinfo
|
|
============
|
|
*/
|
|
wavinfo_t GetWavinfo (char *name, byte *wav, int wavlength)
|
|
{
|
|
wavinfo_t info;
|
|
int i;
|
|
int format;
|
|
int samples;
|
|
|
|
memset (&info, 0, sizeof(info));
|
|
|
|
if (!wav)
|
|
return info;
|
|
|
|
iff_data = wav;
|
|
iff_end = wav + wavlength;
|
|
|
|
// find "RIFF" chunk
|
|
FindChunk("RIFF");
|
|
if (!(data_p && !Q_strncmp(data_p+8, "WAVE", 4)))
|
|
{
|
|
Con_Printf("Missing RIFF/WAVE chunks\n");
|
|
return info;
|
|
}
|
|
|
|
// get "fmt " chunk
|
|
iff_data = data_p + 12;
|
|
// DumpChunks ();
|
|
|
|
FindChunk("fmt ");
|
|
if (!data_p)
|
|
{
|
|
Con_Printf("Missing fmt chunk\n");
|
|
return info;
|
|
}
|
|
data_p += 8;
|
|
format = GetLittleShort();
|
|
if (format != 1)
|
|
{
|
|
Con_Printf("Microsoft PCM format only\n");
|
|
return info;
|
|
}
|
|
|
|
info.channels = GetLittleShort();
|
|
info.rate = GetLittleLong();
|
|
data_p += 4+2;
|
|
info.width = GetLittleShort() / 8;
|
|
|
|
// get cue chunk
|
|
FindChunk("cue ");
|
|
if (data_p)
|
|
{
|
|
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)
|
|
{
|
|
if (!strncmp (data_p + 28, "mark", 4))
|
|
{ // this is not a proper parse, but it works with cooledit...
|
|
data_p += 24;
|
|
i = GetLittleLong (); // samples in loop
|
|
info.samples = info.loopstart + i;
|
|
// Con_Printf("looped length: %i\n", i);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
info.loopstart = -1;
|
|
|
|
// find data chunk
|
|
FindChunk("data");
|
|
if (!data_p)
|
|
{
|
|
Con_Printf("Missing data chunk\n");
|
|
return info;
|
|
}
|
|
|
|
data_p += 4;
|
|
samples = GetLittleLong () / info.width;
|
|
|
|
if (info.samples)
|
|
{
|
|
if (samples < info.samples)
|
|
Sys_Error ("Sound %s has a bad loop length", name);
|
|
}
|
|
else
|
|
info.samples = samples;
|
|
|
|
info.dataofs = data_p - wav;
|
|
|
|
return info;
|
|
}
|
|
|