mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-10 23:32:09 +00:00
48f704c84e
SYS_dev is a holdover from when we had only the one flag and is not meant to be used for tests (I seem to remember mentioning an audit was necessary, but obviously forgotten). One step at a time, I guess :)
299 lines
6.6 KiB
C
299 lines
6.6 KiB
C
/*
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wav.c
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wav file loading
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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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#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 <stdlib.h>
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#include "qfalloca.h"
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#include "QF/cvar.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 "QF/riff.h"
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#include "snd_internal.h"
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#define FRAMES 1024
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typedef struct {
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float *data;
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QFile *file;
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} wav_file_t;
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static sfxbuffer_t *
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wav_callback_load (sfxblock_t *block)
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{
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const sfx_t *sfx = block->sfx;
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const char *name = (const char *) block->file;
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QFile *file;
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int len, fdata_ofs;
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byte *data;
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float *fdata;
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sfxbuffer_t *buffer = 0;
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wavinfo_t *info = &block->wavinfo;
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file = QFS_FOpenFile (name);
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if (!file)
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return 0;
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Qseek (file, info->dataofs, SEEK_SET);
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fdata_ofs = (info->datalen + sizeof (float) - 1) & ~(sizeof (float) - 1);
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len = fdata_ofs + info->frames * info->channels * sizeof (float);
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data = malloc (len);
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if (!data)
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goto bail;
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fdata = (float *) (data + fdata_ofs);
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Qread (file, data, info->datalen);
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SND_Convert (data, fdata, info->frames, info->channels, info->width);
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unsigned buffer_frames = SND_ResamplerFrames (sfx, info->frames);
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buffer = SND_Memory_AllocBuffer (buffer_frames * info->channels);
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if (!buffer)
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goto bail;
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buffer->size = buffer_frames * info->channels;
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buffer->channels = info->channels;
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buffer->sfx_length = info->frames;
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buffer->block = block;
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SND_SetPaint (buffer);
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SND_SetupResampler (buffer, 0);
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SND_Resample (buffer, fdata, info->frames);
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buffer->head = buffer->size;
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bail:
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free (data);
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Qclose (file);
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return buffer;
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}
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static void
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wav_cache (sfx_t *sfx, char *realname, void *file, wavinfo_t info)
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{
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Qclose (file);
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SND_SFX_Block (sfx, realname, info, wav_callback_load);
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}
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static long
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wav_stream_read (void *file, float **buf)
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{
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sfxstream_t *stream = (sfxstream_t *) file;
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wavinfo_t *info = &stream->wavinfo;
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wav_file_t *wf = (wav_file_t *) stream->file;
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int res;
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int len = FRAMES * info->channels * info->width;
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byte *data = alloca (len);
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if (!wf->data)
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wf->data = malloc (FRAMES * info->channels * sizeof (float));
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res = Qread (wf->file, data, len);
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if (res <= 0) {
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stream->error = 1;
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return 0;
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}
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res /= (info->channels * info->width);
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SND_Convert (data, wf->data, res, info->channels, info->width);
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*buf = wf->data;
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return res;
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}
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static int
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wav_stream_seek (sfxstream_t *stream, int pos)
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{
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wavinfo_t *info = &stream->wavinfo;
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wav_file_t *wf = (wav_file_t *) stream->file;
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pos *= info->width * info->channels;
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pos += info->dataofs;
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return Qseek (wf->file, pos, SEEK_SET);
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}
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static void
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wav_stream_close (sfxbuffer_t *buffer)
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{
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sfxstream_t *stream = buffer->stream;
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wav_file_t *wf = (wav_file_t *) stream->file;
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Qclose (wf->file);
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if (wf->data)
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free (wf->data);
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free (wf);
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SND_SFX_StreamClose (stream);
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}
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static sfxbuffer_t *
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wav_stream_open (sfx_t *sfx)
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{
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sfxstream_t *stream = sfx->stream;
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QFile *file;
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wav_file_t *wf;
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file = QFS_FOpenFile (stream->file);
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if (!file)
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return 0;
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wf = calloc (sizeof (wav_file_t), 1);
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wf->file = file;
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return SND_SFX_StreamOpen (sfx, wf, wav_stream_read, wav_stream_seek,
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wav_stream_close);
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}
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static void
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wav_stream (sfx_t *sfx, char *realname, void *file, wavinfo_t info)
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{
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Qclose (file);
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SND_SFX_Stream (sfx, realname, info, wav_stream_open);
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}
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static wavinfo_t
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wav_get_info (QFile *file)
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{
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riff_t *riff;
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riff_d_chunk_t **ck;
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riff_format_t *fmt;
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riff_d_format_t *dfmt = 0;
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riff_data_t *data = 0;
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riff_cue_t *cue;
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riff_d_cue_t *dcue = 0;
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riff_list_t *list;
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riff_d_chunk_t **lck;
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//riff_ltxt_t *ltxt;
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//riff_d_ltxt_t *dltxt = 0;
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wavinfo_t info;
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memset (&info, 0, sizeof (info));
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if (!(riff = riff_read (file))) {
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Sys_Printf ("bad riff file\n");
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return info;
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}
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for (ck = riff->chunks; *ck; ck++) {
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RIFF_SWITCH ((*ck)->name) {
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case RIFF_CASE ('f','m','t',' '):
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fmt = (riff_format_t *) *ck;
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dfmt = (riff_d_format_t *) fmt->fdata;
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break;
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case RIFF_CASE ('d','a','t','a'):
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data = (riff_data_t *) *ck;
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break;
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case RIFF_CASE ('c','u','e',' '):
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cue = (riff_cue_t *) *ck;
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dcue = cue->cue;
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break;
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case RIFF_CASE ('L','I','S','T'):
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list = (riff_list_t *) *ck;
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RIFF_SWITCH (list->name) {
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case RIFF_CASE ('a','d','t','l'):
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for (lck = list->chunks; *lck; lck++) {
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RIFF_SWITCH ((*lck)->name) {
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case RIFF_CASE ('l','t','x','t'):
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//ltxt = (riff_ltxt_t *) *lck;
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//dltxt = <xt->ltxt;
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break;
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}
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}
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break;
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}
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break;
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}
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}
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if (!dfmt) {
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Sys_Printf ("missing format chunk\n");
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goto bail;
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}
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if (dfmt->format_tag != 1) {
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Sys_Printf ("not Microsoft PCM\n");
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goto bail;
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}
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if (dfmt->channels < 1 || dfmt->channels > 8) {
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Sys_Printf ("unsupported channel count\n");
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goto bail;
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}
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if (!data) {
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Sys_Printf ("missing data chunk\n");
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goto bail;
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}
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info.rate = dfmt->samples_per_sec;
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info.width = dfmt->bits_per_sample / 8;
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info.channels = dfmt->channels;
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info.frames = 0;
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info.frames = data->ck.len / (info.width * info.channels);
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if (dcue && dcue->count) {
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if (dcue->cue_points[0].sample_offset < info.frames) {
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info.loopstart = dcue->cue_points[0].sample_offset;
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}
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if (dcue->count > 1) {
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info.frames = min (info.frames, dcue->cue_points[1].sample_offset);
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}
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//if (dltxt)
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// info.frames = info.loopstart + dltxt->len;
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} else {
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info.loopstart = -1;
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}
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info.dataofs = *(int *)data->data;
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info.datalen = data->ck.len;
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bail:
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riff_free (riff);
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return info;
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}
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int
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SND_LoadWav (QFile *file, sfx_t *sfx, char *realname)
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{
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wavinfo_t info;
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info = wav_get_info (file);
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if (!info.rate) {
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return -1;
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}
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if (info.frames / info.rate < 3) {
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Sys_MaskPrintf (SYS_snd, "cache %s\n", realname);
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wav_cache (sfx, realname, file, info);
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} else {
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Sys_MaskPrintf (SYS_snd, "stream %s\n", realname);
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wav_stream (sfx, realname, file, info);
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}
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return 0;
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}
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