mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 21:20:07 +00:00
536 lines
12 KiB
C
536 lines
12 KiB
C
/*
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snd_mem.c
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sound caching
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((unused)) const char rcsid[] =
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"$Id$";
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/cvar.h"
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#include "QF/dstring.h"
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#include "QF/sound.h"
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#include "QF/sys.h"
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#include "QF/qendian.h"
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#include "QF/quakefs.h"
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#include "compat.h"
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#include "snd_render.h"
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typedef struct {
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byte left;
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byte right;
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} stereo8_t;
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typedef struct {
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short left;
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short right;
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} stereo16_t;
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static sfxbuffer_t *
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snd_fail (sfx_t *sfx)
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{
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return 0;
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}
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static void
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snd_noop (sfx_t *sfx)
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{
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}
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sfxbuffer_t *
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SND_CacheTouch (sfx_t *sfx)
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{
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return Cache_Check (&((sfxblock_t *) sfx->data)->cache);
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}
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sfxbuffer_t *
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SND_CacheRetain (sfx_t *sfx)
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{
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return Cache_TryGet (&((sfxblock_t *) sfx->data)->cache);
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}
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void
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SND_CacheRelease (sfx_t *sfx)
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{
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Cache_Release (&((sfxblock_t *) sfx->data)->cache);
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}
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sfxbuffer_t *
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SND_StreamRetain (sfx_t *sfx)
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{
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return &((sfxstream_t *) sfx->data)->buffer;
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}
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void
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SND_StreamRelease (sfx_t *sfx)
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{
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}
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wavinfo_t *
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SND_CacheWavinfo (sfx_t *sfx)
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{
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return &((sfxblock_t *) sfx->data)->wavinfo;
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}
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wavinfo_t *
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SND_StreamWavinfo (sfx_t *sfx)
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{
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return &((sfxstream_t *) sfx->data)->wavinfo;
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}
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static void
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read_samples (sfxbuffer_t *buffer, int count)
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{
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if (buffer->head + count > buffer->length) {
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count -= buffer->length - buffer->head;
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read_samples (buffer, buffer->length - buffer->head);
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} else {
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byte *data;
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float stepscale;
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int samples, size;
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sfx_t *sfx = buffer->sfx;
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sfxstream_t *stream = (sfxstream_t *) sfx->data;
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wavinfo_t *info = &stream->wavinfo;
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stepscale = (float) info->rate / shm->speed; // usually 0.5, 1, or 2
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samples = count * stepscale;
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size = samples * info->width * info->channels;
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data = alloca (size);
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stream->read (stream->file, data, size, info);
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stream->resample (buffer, data, samples);
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buffer->head += count;
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if (buffer->head >= buffer->length)
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buffer->head -= buffer->length;
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}
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}
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void
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SND_StreamAdvance (sfxbuffer_t *buffer, int count)
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{
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float stepscale;
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int headpos, samples;
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int loop_samples = 0;
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sfx_t *sfx = buffer->sfx;
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sfxstream_t *stream = (sfxstream_t *) sfx->data;
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wavinfo_t *info = &stream->wavinfo;
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stepscale = (float) info->rate / shm->speed; // usually 0.5, 1, or 2
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// find out how many samples the buffer currently holds
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samples = buffer->head - buffer->tail;
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if (samples < 0)
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samples += buffer->length;
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// find out where head points to in the stream
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headpos = buffer->pos + samples;
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if (headpos >= sfx->length) {
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if (sfx->loopstart == -1)
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headpos = sfx->length;
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else
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headpos -= sfx->length - sfx->loopstart;
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}
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if (samples < count) {
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buffer->head = buffer->tail = 0;
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buffer->pos += count;
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if (buffer->pos > sfx->length) {
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if (sfx->loopstart == -1) {
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// reset the buffer and fill it incase it's needed again
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headpos = buffer->pos = 0;
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} else {
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buffer->pos -= sfx->loopstart;
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buffer->pos %= sfx->length - sfx->loopstart;
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buffer->pos += sfx->loopstart;
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}
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}
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stream->seek (stream->file, buffer->pos * stepscale, info);
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} else {
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buffer->pos += count;
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if (buffer->pos >= sfx->length) {
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if (sfx->loopstart == -1) {
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// reset the buffer and fill it incase it's needed again
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buffer->pos = 0;
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buffer->head = buffer->tail = 0;
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count = 0;
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} else {
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buffer->pos -= sfx->length - sfx->loopstart;
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}
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}
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buffer->tail += count;
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if (buffer->tail >= buffer->length)
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buffer->tail -= buffer->length;
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}
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// find out how many samples can be read into the buffer
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samples = buffer->tail - buffer->head - 1;
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if (samples < 0)
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samples += buffer->length;
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if (headpos + samples > sfx->length) {
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if (sfx->loopstart == -1) {
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samples = sfx->length - headpos;
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} else {
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loop_samples = headpos + samples - sfx->length;
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samples -= loop_samples;
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}
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}
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if (samples) {
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read_samples (buffer, samples);
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}
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if (loop_samples) {
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stream->seek (stream->file, info->loopstart, info);
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read_samples (buffer, loop_samples);
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}
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}
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void
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SND_Load (sfx_t *sfx)
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{
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dstring_t *name = dstring_new ();
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dstring_t *foundname = dstring_new ();
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char *realname;
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char buf[4];
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QFile *file;
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sfx->touch = sfx->retain = snd_fail;
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sfx->release = snd_noop;
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dsprintf (name, "sound/%s", sfx->name);
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_QFS_FOpenFile (name->str, &file, foundname, 1);
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if (!file) {
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Sys_Printf ("Couldn't load %s\n", name->str);
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dstring_delete (name);
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dstring_delete (foundname);
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return;
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}
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if (!strequal (foundname->str, name->str)) {
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realname = foundname->str;
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dstring_delete (name);
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free (foundname);
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} else {
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realname = name->str;
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free (name);
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dstring_delete (foundname);
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}
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Qread (file, buf, 4);
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Qseek (file, 0, SEEK_SET);
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#ifdef HAVE_VORBIS
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if (strnequal ("OggS", buf, 4)) {
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Sys_DPrintf ("SND_Load: ogg file\n");
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SND_LoadOgg (file, sfx, realname);
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return;
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}
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#endif
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if (strnequal ("RIFF", buf, 4)) {
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Sys_DPrintf ("SND_Load: wav file\n");
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SND_LoadWav (file, sfx, realname);
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return;
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}
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free (realname);
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}
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sfxbuffer_t *
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SND_GetCache (long samples, int rate, int inwidth, int channels,
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sfxblock_t *block, cache_allocator_t allocator)
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{
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int len, size;
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int width;
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float stepscale;
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sfxbuffer_t *sc;
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sfx_t *sfx = block->sfx;
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width = snd_loadas8bit->int_val ? 1 : 2;
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stepscale = (float) rate / shm->speed; // usually 0.5, 1, or 2
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len = size = samples / stepscale;
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//printf ("%ld %d\n", samples, size);
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size *= width * channels;
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sc = allocator (&block->cache, sizeof (sfxbuffer_t) + size, sfx->name);
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if (!sc)
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return 0;
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memset (sc, 0, sizeof (sfxbuffer_t) + size);
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sc->length = len;
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memcpy (sc->data + size, "\xde\xad\xbe\xef", 4);
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return sc;
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}
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void
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SND_ResampleMono (sfxbuffer_t *sc, byte *data, int length)
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{
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unsigned char *ib, *ob;
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int fracstep, outcount, sample, samplefrac, srcsample, i;
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float stepscale;
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short *is, *os;
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wavinfo_t *info = sc->sfx->wavinfo (sc->sfx);
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int inwidth = info->width;
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int inrate = info->rate;
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int outwidth;
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is = (short *) data;
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os = (short *) sc->data;
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ib = data;
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ob = sc->data;
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os += sc->head;
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ob += sc->head;
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stepscale = (float) inrate / shm->speed; // usually 0.5, 1, or 2
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outcount = length / stepscale;
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//printf ("%d %d\n", length, outcount);
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sc->sfx->length = info->samples / stepscale;
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if (info->loopstart != -1)
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sc->sfx->loopstart = info->loopstart / stepscale;
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else
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sc->sfx->loopstart = -1;
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if (snd_loadas8bit->int_val) {
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outwidth = 1;
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sc->paint = SND_PaintChannelFrom8;
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} else {
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outwidth = 2;
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sc->paint = SND_PaintChannelFrom16;
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}
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// resample / decimate to the current source rate
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if (stepscale == 1) {
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if (inwidth == 1 && outwidth == 1) {
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for (i = 0; i < outcount; i++) {
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*ob++ = *ib++ - 128;
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}
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} else if (inwidth == 1 && outwidth == 2) {
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for (i = 0; i < outcount; i++) {
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*os++ = (*ib++ - 128) << 8;
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}
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} else if (inwidth == 2 && outwidth == 1) {
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for (i = 0; i < outcount; i++) {
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*ob++ = LittleShort (*is++) >> 8;
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}
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} else if (inwidth == 2 && outwidth == 2) {
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for (i = 0; i < outcount; i++) {
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*os++ = LittleShort (*is++);
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}
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}
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} else {
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// general case
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if (snd_interp->int_val && stepscale < 1) {
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int j;
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int points = 1 / stepscale;
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for (i = 0; i < length; i++) {
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int s1, s2;
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if (inwidth == 2) {
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s2 = s1 = LittleShort (is[0]);
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if (i < length - 1)
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s2 = LittleShort (is[1]);
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is++;
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} else {
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s2 = s1 = (ib[0] - 128) << 8;
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if (i < length - 1)
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s2 = (ib[1] - 128) << 8;
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ib++;
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}
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for (j = 0; j < points; j++) {
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sample = s1 + (s2 - s1) * ((float) j) / points;
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if (outwidth == 2) {
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os[j] = sample;
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} else {
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ob[j] = sample >> 8;
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}
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}
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if (outwidth == 2) {
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os += points;
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} else {
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ob += points;
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}
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}
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} else {
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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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srcsample = samplefrac >> 8;
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samplefrac += fracstep;
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if (inwidth == 2)
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sample = LittleShort (is[srcsample]);
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else
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sample = (ib[srcsample] - 128) << 8;
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if (outwidth == 2)
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os[i] = sample;
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else
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ob[i] = sample >> 8;
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}
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}
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}
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{
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byte *x = sc->data + sc->length * outwidth;
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if (memcmp (x, "\xde\xad\xbe\xef", 4))
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Sys_Error ("SND_ResampleMono screwed the pooch %02x%02x%02x%02x",
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x[0], x[1], x[2], x[3]);
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}
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}
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void
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SND_ResampleStereo (sfxbuffer_t *sc, byte *data, int length)
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{
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int fracstep, outcount, sl, sr, samplefrac, srcsample, i;
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float stepscale;
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stereo8_t *ib, *ob;
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stereo16_t *is, *os;
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wavinfo_t *info = sc->sfx->wavinfo (sc->sfx);
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int inwidth = info->width;
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int inrate = info->rate;
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int outwidth;
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is = (stereo16_t *) data;
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os = (stereo16_t *) sc->data;
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ib = (stereo8_t *) data;
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ob = (stereo8_t *) sc->data;
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os += sc->head;
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ob += sc->head;
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stepscale = (float) inrate / shm->speed; // usually 0.5, 1, or 2
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outcount = length / stepscale;
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sc->sfx->length = info->samples / stepscale;
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if (info->loopstart != -1)
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sc->sfx->loopstart = info->loopstart / stepscale;
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else
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sc->sfx->loopstart = -1;
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if (snd_loadas8bit->int_val) {
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outwidth = 1;
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sc->paint = SND_PaintChannelStereo8;
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} else {
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outwidth = 2;
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sc->paint = SND_PaintChannelStereo16;
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}
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// resample / decimate to the current source rate
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if (stepscale == 1) {
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if (inwidth == 1 && outwidth == 1) {
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for (i = 0; i < outcount; i++, ob++, ib++) {
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ob->left = ib->left - 128;
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ob->right = ib->right - 128;
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}
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} else if (inwidth == 1 && outwidth == 2) {
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for (i = 0; i < outcount; i++, os++, ib++) {
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os->left = (ib->left - 128) << 8;
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os->right = (ib->right - 128) << 8;
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}
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} else if (inwidth == 2 && outwidth == 1) {
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for (i = 0; i < outcount; i++, ob++, ib++) {
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ob->left = LittleShort (is->left) >> 8;
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ob->right = LittleShort (is->right) >> 8;
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}
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} else if (inwidth == 2 && outwidth == 2) {
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for (i = 0; i < outcount; i++, os++, is++) {
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os->left = LittleShort (is->left);
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os->right = LittleShort (is->right);
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}
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}
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} else {
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// general case
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if (snd_interp->int_val && stepscale < 1) {
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int j;
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int points = 1 / stepscale;
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for (i = 0; i < length; i++) {
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int sl1, sl2;
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int sr1, sr2;
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if (inwidth == 2) {
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sl2 = sl1 = LittleShort (is[0].left);
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sr2 = sr1 = LittleShort (is[0].right);
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if (i < length - 1) {
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sl2 = LittleShort (is[1].left);
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sr2 = LittleShort (is[1].right);
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}
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is++;
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} else {
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sl2 = sl1 = (ib[0].left - 128) << 8;
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sr2 = sr1 = (ib[0].right - 128) << 8;
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if (i < length - 1) {
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sl2 = (ib[1].left - 128) << 8;
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sr2 = (ib[1].right - 128) << 8;
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}
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ib++;
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}
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for (j = 0; j < points; j++) {
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sl = sl1 + (sl2 - sl1) * ((float) j) / points;
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sr = sr1 + (sr2 - sr1) * ((float) j) / points;
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if (outwidth == 2) {
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os[j].left = sl;
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os[j].right = sr;
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} else {
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ob[j].left = sl >> 8;
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ob[j].right = sr >> 8;
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}
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}
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if (outwidth == 2) {
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os += points;
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} else {
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ob += points;
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}
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}
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} else {
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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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srcsample = samplefrac >> 8;
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samplefrac += fracstep;
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if (inwidth == 2) {
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sl = LittleShort (is[srcsample].left);
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sr = LittleShort (is[srcsample].right);
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} else {
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sl = (ib[srcsample].left - 128) << 8;
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sr = (ib[srcsample].right - 128) << 8;
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}
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if (outwidth == 2) {
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os[i].left = sl;
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os[i].right = sr;
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} else {
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ob[i].left = sl >> 8;
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ob[i].right = sr >> 8;
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}
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}
|
|
}
|
|
}
|
|
}
|