Quake: attempt 2duke3d

Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799

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 0000000..71e32aa
--- /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;
+}
+