aboutsummaryrefslogtreecommitdiffstats
path: root/src/ogg_decode.c
blob: e5a9d58d5929d1e2d39985b43866bef54963132f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
/* 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
 */

#include "ogg_decode.h"

#ifdef HAVE_OGG

#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>

#ifdef WORDS_BIGENDIAN
#define OGG_DECODE_USE_BIGENDIAN	1
#else
#define OGG_DECODE_USE_BIGENDIAN	0
#endif

int getOggTotalTime(char * file) {
	OggVorbis_File vf;
	FILE * oggfp;
	int totalTime;
	
	if(!(oggfp = fopen(file,"r"))) return -1;
		
	if(ov_open(oggfp, &vf, NULL, 0) < 0) {
		fclose(oggfp);
		return -1;
	}
	
	totalTime = ov_time_total(&vf,-1)+0.5;

	ov_clear(&vf);

	return totalTime;
}

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];
		int chunkpos = 0;
		long bitRate = 0;
		long test;

		while(!eof) {
			if(dc->seek) {
				cb->end = cb->begin;
				cb->wrap = 0;
				chunkpos = 0;
				ov_time_seek_page(&vf,dc->seekWhere);
				dc->seek = 0;
			}
			ret = ov_read(&vf,chunk+chunkpos,
					CHUNK_SIZE-chunkpos,
					OGG_DECODE_USE_BIGENDIAN,
					2,1,
					&current_section);
			if(ret<=0) eof = 1;
			else chunkpos+=ret;
			if(chunkpos>=CHUNK_SIZE || eof) {
				while(cb->begin==cb->end && cb->wrap &&
						!dc->stop && !dc->seek)
				{
					my_usleep(10000);
				}
				if(dc->stop) break;
				else if(dc->seek) continue;
				memcpy(cb->chunks+cb->end*CHUNK_SIZE,
						chunk,chunkpos);
				cb->chunkSize[cb->end] = chunkpos;
				chunkpos = 0;
				cb->times[cb->end] = ov_time_tell(&vf);
				if((test = ov_bitrate_instant(&vf))>0) {
					bitRate = test/1024;
				}
				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