diff options
Diffstat (limited to 'WinQuake/snd_mem.c')
| -rw-r--r-- | WinQuake/snd_mem.c | 682 |
1 files changed, 341 insertions, 341 deletions
diff --git a/WinQuake/snd_mem.c b/WinQuake/snd_mem.c index 71e32aa..494928a 100644 --- a/WinQuake/snd_mem.c +++ b/WinQuake/snd_mem.c @@ -1,341 +1,341 @@ -/* -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; -} - +/*
+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;
+}
+
|