1 files changed, 341 insertions, 0 deletions

diff --git a/apps/plugins/sdl/progs/quake/snd_mem.c b/apps/plugins/sdl/progs/quake/snd_mem.c
new file mode 100644
index 0000000000..71e32aa056
--- /dev/null
+++ b/apps/plugins/sdl/progs/quake/snd_mem.c
@@ -0,0 +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;
+}
+