Rename struct rc4_context and stream cipher send/receive functions.
[paraslash.git] / spx_afh.c
1 /*
2 * Copyright (C) 2010-2011 Andre Noll <maan@systemlinux.org>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /* This file is based on speexdec.c, by Jean-Marc Valin, see below. */
8
9 /* Copyright (C) 2002-2006 Jean-Marc Valin
10 File: speexdec.c
11
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions
14 are met:
15
16 - Redistributions of source code must retain the above copyright
17 notice, this list of conditions and the following disclaimer.
18
19 - Redistributions in binary form must reproduce the above copyright
20 notice, this list of conditions and the following disclaimer in the
21 documentation and/or other materials provided with the distribution.
22
23 - Neither the name of the Xiph.org Foundation nor the names of its
24 contributors may be used to endorse or promote products derived from
25 this software without specific prior written permission.
26
27 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
31 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
34 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
35 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
36 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
37 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 */
39 /** \file spx_afh.c Audio format handler for ogg/speex files. */
40
41 #include <stdbool.h>
42 #include <ogg/ogg.h>
43 #include <regex.h>
44 #include <speex/speex.h>
45 #include <speex/speex_header.h>
46 #include <speex/speex_stereo.h>
47
48 #include "para.h"
49 #include "afh.h"
50 #include "error.h"
51 #include "portable_io.h"
52 #include "string.h"
53 #include "spx.h"
54 #include "ogg_afh_common.h"
55
56 struct private_spx_data {
57 struct spx_header_info shi;
58 };
59
60
61 static char *copy_comment(const char *src, int len)
62 {
63 char *p = para_malloc(len + 1);
64
65 if (len > 0)
66 memcpy(p, src, len);
67 p[len] = '\0';
68 PARA_DEBUG_LOG("%s\n", p);
69 return p;
70 }
71
72 static bool copy_if_tag_type(const char *tag, int taglen, const char *type,
73 char **p)
74 {
75 int len = strlen(type);
76
77 if (taglen <= len)
78 return false;
79 if (strncasecmp(tag, type, len))
80 return false;
81 if (tag[len] != '=')
82 return false;
83 free(*p);
84 *p = copy_comment(tag + len + 1, taglen - len - 1);
85 return true;
86 }
87
88 static int spx_get_comments(unsigned char *comments, int length,
89 struct taginfo *tags)
90 {
91 char *c = (char *)comments;
92 uint32_t len, nb_fields;
93 int i;
94 char *end;
95
96 if (length < 8)
97 return -E_SPX_COMMENT;
98 end = c + length;
99 len = read_u32(c);
100 c += 4;
101 if (c + len > end)
102 return -E_SPX_COMMENT;
103 tags->comment = copy_comment(c, len);
104
105 c += len;
106 if (c + 4 > end)
107 return -E_SPX_COMMENT;
108 nb_fields = read_u32(c);
109 PARA_DEBUG_LOG("%d comment(s)\n", nb_fields);
110 c += 4;
111 for (i = 0; i < nb_fields; i++, c += len) {
112 char *tag;
113
114 if (c + 4 > end)
115 return -E_SPX_COMMENT;
116 len = read_u32(c);
117 c += 4;
118 if (c + len > end)
119 return -E_SPX_COMMENT;
120 if (copy_if_tag_type(c, len, "author", &tags->artist))
121 continue;
122 if (copy_if_tag_type(c, len, "artist", &tags->artist))
123 continue;
124 if (copy_if_tag_type(c, len, "title", &tags->title))
125 continue;
126 if (copy_if_tag_type(c, len, "album", &tags->album))
127 continue;
128 if (copy_if_tag_type(c, len, "year", &tags->year))
129 continue;
130 if (copy_if_tag_type(c, len, "comment", &tags->comment))
131 continue;
132 tag = copy_comment(c, len);
133 PARA_NOTICE_LOG("unrecognized comment: %s\n", tag);
134 free(tag);
135 }
136 return 1;
137 }
138
139 static const char* speex_suffixes[] = {"spx", "speex", NULL};
140
141 static int spx_packet_callback(ogg_packet *packet, int packet_num,
142 __a_unused int serial, struct afh_info *afhi,
143 void *private_data)
144 {
145 struct private_spx_data *psd = private_data;
146 int ret;
147
148 if (packet_num == 0) {
149 ret = spx_process_header(packet->packet, packet->bytes,
150 &psd->shi);
151 if (ret < 0)
152 return ret;
153 afhi->channels = psd->shi.channels;
154 afhi->frequency = psd->shi.sample_rate;
155 afhi->bitrate = psd->shi.bitrate / 1000;
156 afhi->techinfo = make_message("%s, v%d", psd->shi.mode->modeName,
157 psd->shi.mode->bitstream_version);
158 return 1;
159 }
160 if (packet_num == 1) {
161 ret = spx_get_comments(packet->packet, packet->bytes,
162 &afhi->tags);
163 if (ret < 0)
164 return ret;
165 return 0; /* header complete */
166 }
167 /* never reached */
168 return 0;
169 }
170
171 static int spx_get_file_info(char *map, size_t numbytes, __a_unused int fd,
172 struct afh_info *afhi)
173 {
174 struct private_spx_data psd;
175 struct ogg_afh_callback_info spx_callback_info = {
176 .packet_callback = spx_packet_callback,
177 .private_data = &psd,
178 };
179
180 memset(&psd, 0, sizeof(psd));
181 return ogg_get_file_info(map, numbytes, afhi, &spx_callback_info);
182 }
183
184 /**
185 * The init function of the ogg/speex audio format handler.
186 *
187 * \param afh Pointer to the struct to initialize.
188 */
189 void spx_afh_init(struct audio_format_handler *afh)
190 {
191 afh->get_file_info = spx_get_file_info,
192 afh->suffixes = speex_suffixes;
193 }