297 lines
6.3 KiB
C
297 lines
6.3 KiB
C
/*
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vorbis.c
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Ogg Vorbis support
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Copyright (C) 2001 Bill Currie <bill@taniwha.org>
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Author: Bill Currie <bill@taniwha.org>
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Date: 2002/6/14
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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__ ((used)) 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 <stdlib.h>
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#include <vorbis/vorbisfile.h>
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#include "QF/cvar.h"
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#include "QF/quakefs.h"
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#include "QF/sound.h"
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#include "QF/sys.h"
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#include "snd_render.h"
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static size_t
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vorbis_read_func (void *ptr, size_t size, size_t nmemb, void *datasource)
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{
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return Qread (datasource, ptr, size * nmemb);
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}
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static int
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vorbis_seek_func (void *datasource, ogg_int64_t offset, int whence)
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{
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return Qseek (datasource, offset, whence);
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}
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static int
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vorbis_close_func (void *datasource)
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{
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Qclose (datasource);
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return 0;
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}
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static long
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vorbis_tell_func (void *datasource)
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{
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return Qtell (datasource);
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}
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static ov_callbacks callbacks = {
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vorbis_read_func,
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vorbis_seek_func,
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vorbis_close_func,
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vorbis_tell_func,
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};
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static wavinfo_t
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vorbis_get_info (OggVorbis_File *vf)
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{
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vorbis_info *vi;
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int sample_start = -1, sample_count = 0;
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int samples;
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char **ptr;
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wavinfo_t info;
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vi = ov_info (vf, -1);
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samples = ov_pcm_total (vf, -1);
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for (ptr = ov_comment (vf, -1)->user_comments; *ptr; ptr++) {
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Sys_DPrintf ("%s\n", *ptr);
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if (strncmp ("CUEPOINT=", *ptr, 9) == 0) {
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sscanf (*ptr + 9, "%d %d", &sample_start, &sample_count);
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}
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}
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if (sample_start != -1)
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samples = sample_start + sample_count;
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info.rate = vi->rate;
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info.width = 2;
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info.channels = vi->channels;
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info.loopstart = sample_start;
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info.samples = samples;
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info.dataofs = 0;
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info.datalen = samples * 2;
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if (developer->int_val) {
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Sys_Printf ("\nBitstream is %d channel, %dHz\n",
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info.channels, info.rate);
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Sys_Printf ("\nDecoded length: %d samples (%d bytes)\n",
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info.samples, info.samples * info.channels * 2);
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Sys_Printf ("Encoded by: %s\n\n", ov_comment (vf, -1)->vendor);
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}
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return info;
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}
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static int
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vorbis_read (OggVorbis_File *vf, byte *buf, int len)
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{
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int count = 0;
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int current_section;
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while (len) {
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int res = ov_read (vf, (char *) buf, len, 0, 2, 1,
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¤t_section);
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if (res > 0) {
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count += res;
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len -= res;
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buf += res;
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} else if (res < 0) {
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Sys_Printf ("vorbis error %d\n", res);
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return -1;
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} else {
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Sys_Printf ("unexpected eof\n");
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break;
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}
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}
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return count;
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}
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static sfxbuffer_t *
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vorbis_load (OggVorbis_File *vf, sfxblock_t *block, cache_allocator_t allocator)
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{
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byte *data;
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sfxbuffer_t *sc = 0;
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sfx_t *sfx = block->sfx;
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void (*resample)(sfxbuffer_t *, byte *, int);
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wavinfo_t *info = &block->wavinfo;
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switch (info->channels) {
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case 1:
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resample = SND_ResampleMono;
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break;
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case 2:
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resample = SND_ResampleStereo;
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break;
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default:
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Sys_Printf ("%s: unsupported channel count: %d\n",
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sfx->name, info->channels);
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return 0;
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}
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data = malloc (info->datalen);
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if (!data)
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goto bail;
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sc = SND_GetCache (info->samples, info->rate, info->width, info->channels,
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block, allocator);
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if (!sc)
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goto bail;
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sc->sfx = sfx;
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if (vorbis_read (vf, data, info->datalen) < 0)
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goto bail;
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SND_SetPaint (sc);
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resample (sc, data, info->samples);
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sc->head = sc->length;
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bail:
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if (data)
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free (data);
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ov_clear (vf);
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return sc;
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}
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static void
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vorbis_callback_load (void *object, cache_allocator_t allocator)
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{
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QFile *file;
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OggVorbis_File vf;
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sfxblock_t *block = (sfxblock_t *) object;
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QFS_FOpenFile (block->file, &file);
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if (!file)
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return; //FIXME Sys_Error?
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if (ov_open_callbacks (file, &vf, 0, 0, callbacks) < 0) {
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Sys_Printf ("Input does not appear to be an Ogg bitstream.\n");
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Qclose (file);
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return; //FIXME Sys_Error?
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}
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vorbis_load (&vf, block, allocator);
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}
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static void
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vorbis_cache (sfx_t *sfx, char *realname, OggVorbis_File *vf, wavinfo_t info)
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{
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ov_clear (vf);
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SND_SFX_Cache (sfx, realname, info, vorbis_callback_load);
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}
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static int
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vorbis_stream_read (void *file, byte *buf, int count, wavinfo_t *info)
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{
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return vorbis_read (file, buf, count);
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}
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static int
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vorbis_stream_seek (void *file, int pos, wavinfo_t *info)
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{
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return ov_pcm_seek (file, pos);
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}
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static void
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vorbis_stream_close (sfx_t *sfx)
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{
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sfxstream_t *stream = sfx->data.stream;
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ov_clear (stream->file);
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free (stream);
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free (sfx);
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}
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static sfx_t *
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vorbis_stream_open (sfx_t *sfx)
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{
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sfxstream_t *stream = sfx->data.stream;
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QFile *file;
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void *f;
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QFS_FOpenFile (stream->file, &file);
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if (!file)
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return 0;
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f = malloc (sizeof (OggVorbis_File));
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if (ov_open_callbacks (file, f, 0, 0, callbacks) < 0) {
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Sys_Printf ("Input does not appear to be an Ogg bitstream.\n");
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Qclose (file);
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free (f);
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return 0;
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}
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return SND_SFX_StreamOpen (sfx, f, vorbis_stream_read, vorbis_stream_seek,
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vorbis_stream_close);
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}
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static void
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vorbis_stream (sfx_t *sfx, char *realname, OggVorbis_File *vf, wavinfo_t info)
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{
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ov_clear (vf);
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SND_SFX_Stream (sfx, realname, info, vorbis_stream_open);
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}
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int
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SND_LoadOgg (QFile *file, sfx_t *sfx, char *realname)
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{
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OggVorbis_File vf;
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wavinfo_t info;
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if (ov_open_callbacks (file, &vf, 0, 0, callbacks) < 0) {
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Sys_Printf ("Input does not appear to be an Ogg bitstream.\n");
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free (realname);
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return -1;
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}
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info = vorbis_get_info (&vf);
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if (info.channels < 1 || info.channels > 2) {
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Sys_Printf ("unsupported number of channels");
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return -1;
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}
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if (info.samples / info.rate < 3) {
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Sys_DPrintf ("cache %s\n", realname);
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vorbis_cache (sfx, realname, &vf, info);
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} else {
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Sys_DPrintf ("stream %s\n", realname);
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vorbis_stream (sfx, realname, &vf, info);
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}
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return 0;
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}
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