forked from len0rd/rockbox
Quake!
This ports id Software's Quake to run on the SDL plugin runtime. The source code originated from id under the GPLv2 license. I used https://github.com/ahefner/sdlquake as the base of my port. Performance is, unsurprisingly, not on par with what you're probably used to on PC. I average about 10FPS on ipod6g, but it's still playable. Sound works well enough, but in-game music is not supported. I've written ARM assembly routines for the inner sound loop. Make sure you turn the "brightness" all the way down, or colors will look funky. To run, extract Quake's data files to /.rockbox/quake. Have fun! Change-Id: I4285036e967d7f0722802d43cf2096c808ca5799
This commit is contained in:
Franklin Wei
parent
b70fecf21d
commit
5d05b9d3e9
171 changed files with 64268 additions and 20 deletions
341
apps/plugins/sdl/progs/quake/snd_mem.c
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341
apps/plugins/sdl/progs/quake/snd_mem.c
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/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// snd_mem.c: sound caching
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#include "quakedef.h"
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int cache_full_cycle;
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byte *S_Alloc (int size);
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/*
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================
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ResampleSfx
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================
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*/
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void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
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{
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int outcount;
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int srcsample;
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float stepscale;
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int i;
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int sample, samplefrac, fracstep;
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sfxcache_t *sc;
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sc = Cache_Check (&sfx->cache);
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if (!sc)
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return;
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stepscale = (float)inrate / shm->speed; // this is usually 0.5, 1, or 2
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outcount = sc->length / stepscale;
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sc->length = outcount;
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if (sc->loopstart != -1)
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sc->loopstart = sc->loopstart / stepscale;
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sc->speed = shm->speed;
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if (loadas8bit.value)
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sc->width = 1;
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else
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sc->width = inwidth;
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sc->stereo = 0;
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// resample / decimate to the current source rate
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if (stepscale == 1 && inwidth == 1 && sc->width == 1)
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{
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// fast special case
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for (i=0 ; i<outcount ; i++)
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((signed char *)sc->data)[i]
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= (int)( (unsigned char)(data[i]) - 128);
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}
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else
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{
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// general case
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samplefrac = 0;
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fracstep = stepscale*256;
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for (i=0 ; i<outcount ; i++)
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{
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srcsample = samplefrac >> 8;
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samplefrac += fracstep;
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if (inwidth == 2)
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sample = LittleShort ( ((short *)data)[srcsample] );
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else
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sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
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if (sc->width == 2)
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((short *)sc->data)[i] = sample;
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else
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((signed char *)sc->data)[i] = sample >> 8;
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}
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}
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}
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//=============================================================================
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/*
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==============
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S_LoadSound
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==============
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*/
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sfxcache_t *S_LoadSound (sfx_t *s)
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{
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char namebuffer[256];
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byte *data;
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wavinfo_t info;
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int len;
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float stepscale;
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sfxcache_t *sc;
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byte stackbuf[1*1024]; // avoid dirtying the cache heap
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// see if still in memory
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sc = Cache_Check (&s->cache);
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if (sc)
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return sc;
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//Con_Printf ("S_LoadSound: %x\n", (int)stackbuf);
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// load it in
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Q_strcpy(namebuffer, "sound/");
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Q_strcat(namebuffer, s->name);
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// Con_Printf ("loading %s\n",namebuffer);
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data = COM_LoadStackFile(namebuffer, stackbuf, sizeof(stackbuf));
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if (!data)
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{
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Con_Printf ("Couldn't load %s\n", namebuffer);
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return NULL;
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}
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info = GetWavinfo (s->name, data, com_filesize);
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if (info.channels != 1)
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{
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Con_Printf ("%s is a stereo sample\n",s->name);
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return NULL;
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}
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stepscale = (float)info.rate / shm->speed;
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len = info.samples / stepscale;
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len = len * info.width * info.channels;
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sc = Cache_Alloc ( &s->cache, len + sizeof(sfxcache_t), s->name);
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if (!sc)
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return NULL;
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sc->length = info.samples;
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sc->loopstart = info.loopstart;
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sc->speed = info.rate;
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sc->width = info.width;
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sc->stereo = info.channels;
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ResampleSfx (s, sc->speed, sc->width, data + info.dataofs);
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return sc;
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}
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/*
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===============================================================================
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WAV loading
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===============================================================================
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*/
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byte *data_p;
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byte *iff_end;
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byte *last_chunk;
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byte *iff_data;
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int iff_chunk_len;
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short GetLittleShort(void)
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{
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short val = 0;
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val = *data_p;
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val = val + (*(data_p+1)<<8);
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data_p += 2;
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return val;
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}
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int GetLittleLong(void)
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{
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int val = 0;
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val = *data_p;
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val = val + (*(data_p+1)<<8);
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val = val + (*(data_p+2)<<16);
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val = val + (*(data_p+3)<<24);
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data_p += 4;
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return val;
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}
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void FindNextChunk(char *name)
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{
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while (1)
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{
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data_p=last_chunk;
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if (data_p >= iff_end)
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{ // didn't find the chunk
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data_p = NULL;
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return;
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}
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data_p += 4;
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iff_chunk_len = GetLittleLong();
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if (iff_chunk_len < 0)
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{
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data_p = NULL;
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return;
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}
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// if (iff_chunk_len > 1024*1024)
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// Sys_Error ("FindNextChunk: %i length is past the 1 meg sanity limit", iff_chunk_len);
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data_p -= 8;
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last_chunk = data_p + 8 + ( (iff_chunk_len + 1) & ~1 );
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if (!Q_strncmp(data_p, name, 4))
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return;
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}
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}
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void FindChunk(char *name)
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{
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last_chunk = iff_data;
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FindNextChunk (name);
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}
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void DumpChunks(void)
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{
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char str[5];
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str[4] = 0;
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data_p=iff_data;
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do
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{
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memcpy (str, data_p, 4);
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data_p += 4;
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iff_chunk_len = GetLittleLong();
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Con_Printf ("0x%x : %s (%d)\n", (int)(data_p - 4), str, iff_chunk_len);
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data_p += (iff_chunk_len + 1) & ~1;
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} while (data_p < iff_end);
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}
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/*
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============
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GetWavinfo
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============
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*/
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wavinfo_t GetWavinfo (char *name, byte *wav, int wavlength)
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{
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wavinfo_t info;
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int i;
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int format;
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int samples;
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memset (&info, 0, sizeof(info));
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if (!wav)
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return info;
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iff_data = wav;
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iff_end = wav + wavlength;
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// find "RIFF" chunk
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FindChunk("RIFF");
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if (!(data_p && !Q_strncmp(data_p+8, "WAVE", 4)))
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{
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Con_Printf("Missing RIFF/WAVE chunks\n");
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return info;
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}
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// get "fmt " chunk
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iff_data = data_p + 12;
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// DumpChunks ();
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FindChunk("fmt ");
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if (!data_p)
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{
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Con_Printf("Missing fmt chunk\n");
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return info;
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}
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data_p += 8;
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format = GetLittleShort();
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if (format != 1)
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{
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Con_Printf("Microsoft PCM format only\n");
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return info;
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}
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info.channels = GetLittleShort();
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info.rate = GetLittleLong();
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data_p += 4+2;
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info.width = GetLittleShort() / 8;
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// get cue chunk
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FindChunk("cue ");
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if (data_p)
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{
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data_p += 32;
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info.loopstart = GetLittleLong();
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// Con_Printf("loopstart=%d\n", sfx->loopstart);
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// if the next chunk is a LIST chunk, look for a cue length marker
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FindNextChunk ("LIST");
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if (data_p)
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{
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if (!strncmp (data_p + 28, "mark", 4))
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{ // this is not a proper parse, but it works with cooledit...
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data_p += 24;
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i = GetLittleLong (); // samples in loop
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info.samples = info.loopstart + i;
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// Con_Printf("looped length: %i\n", i);
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}
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}
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}
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else
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info.loopstart = -1;
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// find data chunk
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FindChunk("data");
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if (!data_p)
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{
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Con_Printf("Missing data chunk\n");
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return info;
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}
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data_p += 4;
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samples = GetLittleLong () / info.width;
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if (info.samples)
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{
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if (samples < info.samples)
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Sys_Error ("Sound %s has a bad loop length", name);
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}
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else
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info.samples = samples;
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info.dataofs = data_p - wav;
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return info;
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}
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