/* wav.c wav file loading 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ #ifdef HAVE_CONFIG_H # include "config.h" #endif static __attribute__ ((used)) const char rcsid[] = "$Id$"; #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include "QF/cvar.h" #include "QF/sound.h" #include "QF/sys.h" #include "QF/qendian.h" #include "QF/quakefs.h" #include "QF/riff.h" #include "snd_render.h" #define FRAMES 1024 typedef struct { float *data; QFile *file; } wav_file_t; static void wav_callback_load (void *object, cache_allocator_t allocator) { sfxblock_t *block = (sfxblock_t *) object; sfx_t *sfx = block->sfx; const char *name = (const char *) block->file; QFile *file; int len; byte *data; float *fdata; sfxbuffer_t *buffer; wavinfo_t *info = &block->wavinfo; QFS_FOpenFile (name, &file); if (!file) return; //FIXME Sys_Error? Qseek (file, info->dataofs, SEEK_SET); len = info->datalen + info->frames * info->channels * sizeof (float); data = malloc (len); fdata = (float *) (data + info->datalen); Qread (file, data, info->datalen); Qclose (file); SND_Convert (data, fdata, info->frames, info->channels, info->width); buffer = SND_GetCache (info->frames, info->rate, info->channels, block, allocator); buffer->sfx = sfx; SND_SetPaint (buffer); SND_SetupResampler (buffer, 0); SND_Resample (buffer, fdata, info->frames); buffer->head = buffer->length; free (data); } static void wav_cache (sfx_t *sfx, char *realname, void *file, wavinfo_t info) { Qclose (file); SND_SFX_Cache (sfx, realname, info, wav_callback_load); } static long wav_stream_read (void *file, float **buf) { sfxstream_t *stream = (sfxstream_t *) file; wavinfo_t *info = &stream->wavinfo; wav_file_t *wf = (wav_file_t *) stream->file; int res; int len = FRAMES * info->channels * info->width; byte *data = alloca (len); if (!wf->data) wf->data = malloc (FRAMES * info->channels * sizeof (float)); res = Qread (wf->file, data, len); if (res <= 0) return res; res /= (info->channels * info->width); SND_Convert (data, wf->data, res, info->channels, info->width); *buf = wf->data; return res; } static int wav_stream_seek (sfxstream_t *stream, int pos) { wavinfo_t *info = &stream->wavinfo; wav_file_t *wf = (wav_file_t *) stream->file; pos *= info->width * info->channels; pos += info->dataofs; return Qseek (wf->file, pos, SEEK_SET); } static void wav_stream_close (sfx_t *sfx) { sfxstream_t *stream = sfx->data.stream; wav_file_t *wf = (wav_file_t *) stream->file; Qclose (wf->file); if (wf->data) free (wf->data); free (wf); SND_SFX_StreamClose (sfx); } static sfx_t * wav_stream_open (sfx_t *sfx) { sfxstream_t *stream = sfx->data.stream; QFile *file; wav_file_t *wf; QFS_FOpenFile (stream->file, &file); if (!file) return 0; wf = calloc (sizeof (wav_file_t), 1); wf->file = file; return SND_SFX_StreamOpen (sfx, wf, wav_stream_read, wav_stream_seek, wav_stream_close); } static void wav_stream (sfx_t *sfx, char *realname, void *file, wavinfo_t info) { Qclose (file); SND_SFX_Stream (sfx, realname, info, wav_stream_open); } static wavinfo_t wav_get_info (QFile *file) { riff_t *riff; riff_d_chunk_t **ck; riff_format_t *fmt; riff_d_format_t *dfmt = 0; riff_data_t *data = 0; riff_cue_t *cue; riff_d_cue_t *dcue; riff_d_cue_point_t *cp = 0; riff_list_t *list; riff_d_chunk_t **lck; riff_ltxt_t *ltxt; riff_d_ltxt_t *dltxt = 0; wavinfo_t info; memset (&info, 0, sizeof (info)); if (!(riff = riff_read (file))) { Sys_Printf ("bad riff file\n"); return info; } for (ck = riff->chunks; *ck; ck++) { RIFF_SWITCH ((*ck)->name) { case RIFF_CASE ('f','m','t',' '): fmt = (riff_format_t *) *ck; dfmt = (riff_d_format_t *) fmt->fdata; break; case RIFF_CASE ('d','a','t','a'): data = (riff_data_t *) *ck; break; case RIFF_CASE ('c','u','e',' '): cue = (riff_cue_t *) *ck; dcue = cue->cue; if (dcue->count) cp = &dcue->cue_points[dcue->count - 1]; break; case RIFF_CASE ('L','I','S','T'): list = (riff_list_t *) *ck; RIFF_SWITCH (list->name) { case RIFF_CASE ('a','d','t','l'): for (lck = list->chunks; *lck; lck++) { RIFF_SWITCH ((*lck)->name) { case RIFF_CASE ('l','t','x','t'): ltxt = (riff_ltxt_t *) *lck; dltxt = <xt->ltxt; break; } } break; } break; } } if (!dfmt) { Sys_Printf ("missing format chunk\n"); goto bail; } if (!data) { Sys_Printf ("missing data chunk\n"); goto bail; } if (dfmt->format_tag != 1) { Sys_Printf ("not Microsfot PCM\n"); goto bail; } if (dfmt->channels < 1 || dfmt->channels > 2) { Sys_Printf ("unsupported channel count\n"); goto bail; } info.rate = dfmt->samples_per_sec; info.width = dfmt->bits_per_sample / 8; info.channels = dfmt->channels; info.frames = 0; if (cp) { info.loopstart = cp->sample_offset; if (dltxt) info.frames = info.loopstart + dltxt->len; } else { info.loopstart = -1; } if (!info.frames) info.frames = data->ck.len / (info.width * info.channels); info.dataofs = *(int *)data->data; info.datalen = data->ck.len; bail: riff_free (riff); return info; } int SND_LoadWav (QFile *file, sfx_t *sfx, char *realname) { wavinfo_t info; info = wav_get_info (file); if (!info.rate) { return -1; } if (info.frames / info.rate < 3) { Sys_DPrintf ("cache %s\n", realname); wav_cache (sfx, realname, file, info); } else { Sys_DPrintf ("stream %s\n", realname); wav_stream (sfx, realname, file, info); } return 0; }