1 /* -*- c-basic-offset: 8; -*- */
2 /* vorbis.c: Ogg Vorbis data handlers for libshout
3 * $Id$
4 *
5 * Copyright (C) 2002-2004 the Icecast team <team@icecast.org>
6 * Copyright (C) 2015-2019 Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the Free
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #ifdef HAVE_CONFIG_H
24 # include <config.h>
25 #endif
26
27 #ifdef HAVE_INTTYPES_H
28 # include <inttypes.h>
29 #endif
30 #include <stdlib.h>
31
32 #include <vorbis/codec.h>
33
34 #include "shout_private.h"
35 #include "format_ogg.h"
36
37 /* -- local data structures -- */
38 typedef struct {
39 vorbis_info vi;
40 vorbis_comment vc;
41 int prevW;
42 } vorbis_data_t;
43
44 /* -- local prototypes -- */
45 static int read_vorbis_page(ogg_codec_t *codec, ogg_page *page);
46 static void free_vorbis_data(void *codec_data);
47 static int vorbis_blocksize(vorbis_data_t *vd, ogg_packet *p);
48
49 /* -- vorbis functions -- */
_shout_open_vorbis(ogg_codec_t * codec,ogg_page * page)50 int _shout_open_vorbis(ogg_codec_t *codec, ogg_page *page)
51 {
52 vorbis_data_t *vorbis_data = calloc(1, sizeof(vorbis_data_t));
53 ogg_packet packet;
54
55 (void)page;
56
57 if (!vorbis_data)
58 return SHOUTERR_MALLOC;
59
60 vorbis_info_init(&vorbis_data->vi);
61 vorbis_comment_init(&vorbis_data->vc);
62
63 ogg_stream_packetout(&codec->os, &packet);
64
65 if (vorbis_synthesis_headerin(&vorbis_data->vi, &vorbis_data->vc, &packet) < 0) {
66 free_vorbis_data(vorbis_data);
67 return SHOUTERR_UNSUPPORTED;
68 }
69
70 codec->codec_data = vorbis_data;
71 codec->read_page = read_vorbis_page;
72 codec->free_data = free_vorbis_data;
73
74 return SHOUTERR_SUCCESS;
75 }
76
read_vorbis_page(ogg_codec_t * codec,ogg_page * page)77 static int read_vorbis_page(ogg_codec_t *codec, ogg_page *page)
78 {
79 ogg_packet packet;
80 vorbis_data_t *vorbis_data = codec->codec_data;
81 uint64_t samples = 0;
82 (void) page;
83
84 if (codec->headers < 3) {
85 while (ogg_stream_packetout(&codec->os, &packet) > 0) {
86 if (vorbis_synthesis_headerin(&vorbis_data->vi, &vorbis_data->vc, &packet) < 0)
87 return SHOUTERR_INSANE;
88 codec->headers++;
89 }
90
91 return SHOUTERR_SUCCESS;
92 }
93
94 while (ogg_stream_packetout(&codec->os, &packet) > 0) {
95 samples += vorbis_blocksize(vorbis_data, &packet);
96 }
97
98 codec->senttime += ((samples * 1000000) / vorbis_data->vi.rate);
99
100 return SHOUTERR_SUCCESS;
101 }
102
free_vorbis_data(void * codec_data)103 static void free_vorbis_data(void *codec_data)
104 {
105 vorbis_data_t *vorbis_data = (vorbis_data_t*)codec_data;
106
107 vorbis_info_clear(&vorbis_data->vi);
108 vorbis_comment_clear(&vorbis_data->vc);
109 free(vorbis_data);
110 }
111
vorbis_blocksize(vorbis_data_t * vd,ogg_packet * p)112 static int vorbis_blocksize(vorbis_data_t *vd, ogg_packet *p)
113 {
114 int this = vorbis_packet_blocksize(&vd->vi, p);
115 int ret = (this + vd->prevW) / 4;
116
117 if (!vd->prevW) {
118 vd->prevW = this;
119 return 0;
120 }
121
122 vd->prevW = this;
123 return ret;
124 }
125