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-rw-r--r--src/ogg_decode.c121
1 files changed, 121 insertions, 0 deletions
diff --git a/src/ogg_decode.c b/src/ogg_decode.c
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+++ b/src/ogg_decode.c
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+/* the Music Player Daemon (MPD)
+ * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
+ * This project's homepage is: http://www.musicpd.org
+ *
+ * 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 the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef HAVE_OGG
+#include "ogg_decode.h"
+
+#include "command.h"
+#include "utils.h"
+#include "audio.h"
+#include "log.h"
+#include "pcm_utils.h"
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <vorbis/vorbisfile.h>
+
+int ogg_decode(Buffer * cb, AudioFormat * af, DecoderControl * dc)
+{
+ OggVorbis_File vf;
+ FILE * oggfp;
+
+ if(!(oggfp = fopen(dc->file,"r"))) {
+ ERROR("failed to open ogg\n");
+ return -1;
+ }
+
+ if(ov_open(oggfp, &vf, NULL, 0) < 0) {
+ ERROR("Input does not appear to be an Ogg bit stream.\n");
+ fclose(oggfp);
+ return -1;
+ }
+
+ {
+ vorbis_info *vi=ov_info(&vf,-1);
+ af->bits = 16;
+ af->channels = vi->channels;
+ af->sampleRate = vi->rate;
+ }
+
+ cb->totalTime = ov_time_total(&vf,-1);
+ dc->state = DECODE_STATE_DECODE;
+ dc->start = 0;
+
+ {
+ int current_section;
+ int eof = 0;
+ long ret;
+ char chunk[CHUNK_SIZE];
+ long bitRate = 0;
+ long test;
+
+ while(!eof) {
+ if(dc->seek) {
+ cb->end = 0;
+ cb->wrap = 0;
+ ov_time_seek_page(&vf,dc->seekWhere);
+ dc->seek = 0;
+ }
+ ret = ov_read(&vf,chunk,CHUNK_SIZE,0,2,1,
+ &current_section);
+ if(ret<=0) eof = 1;
+ else {
+ while(cb->begin==cb->end && cb->wrap &&
+ !dc->stop && !dc->seek)
+ {
+ usleep(1000);
+ }
+ if(dc->stop) break;
+ else if(dc->seek) continue;
+#ifdef WORDS_BIGENDIAN
+ pcm_changeBufferEndianness(chunk,CHUNK_SIZE,
+ af->bits);
+#endif
+ memcpy(cb->chunks+cb->end*CHUNK_SIZE,
+ chunk,CHUNK_SIZE);
+ cb->chunkSize[cb->end] = ret;
+ cb->times[cb->end] = ov_time_tell(&vf);
+ if((test = ov_bitrate_instant(&vf))>0) {
+ bitRate = test/1000;
+ }
+ cb->bitRate[cb->end] = bitRate;
+ cb->end++;
+ if(cb->end>=BUFFERED_CHUNKS) {
+ cb->end = 0;
+ cb->wrap = 1;
+ }
+ }
+ }
+
+ ov_clear(&vf);
+
+ if(dc->seek) dc->seek = 0;
+
+ if(dc->stop) {
+ dc->state = DECODE_STATE_STOP;
+ dc->stop = 0;
+ }
+ else dc->state = DECODE_STATE_STOP;
+ }
+
+ return 0;
+}
+
+#endif