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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
This file is part of Deadbeef Player source code
http://deadbeef.sourceforge.net
DeaDBeeF Ogg Edit library Flac functions
Copyright (C) 2014 Ian Nartowicz <deadbeef@nartowicz.co.uk>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "oggedit_internal.h"
#define PADTYPE 0x01
#define VCTYPE 0x04
#define LASTBLOCK 0x80
off_t oggedit_flac_stream_info(DB_FILE *in, const off_t start_offset, const off_t end_offset)
{
ogg_sync_state oy;
ogg_sync_init(&oy);
const off_t stream_size = codec_stream_size(in, &oy, start_offset, end_offset, FLACNAME);
cleanup(in, NULL, &oy, NULL);
return stream_size;
}
static void clear_header_list(ogg_packet **headers)
{
if (headers) {
for (ogg_packet **header = headers; *header; header++) {
ogg_packet_clear(*header);
free(*header);
}
free(headers);
}
}
static ogg_packet **headers_alloc(ogg_packet **headers, const size_t packets)
{
ogg_packet **new_headers = realloc(headers, (packets+2) * sizeof(headers));
if (!new_headers) {
clear_header_list(headers);
return NULL;
}
if (!(new_headers[packets] = malloc(sizeof(ogg_packet)))) {
clear_header_list(new_headers);
return NULL;
}
new_headers[packets + 1] = NULL;
return new_headers;
}
static ogg_packet **metadata_block_packets(DB_FILE *in, ogg_sync_state *oy, const off_t offset, char **vendor, int *res)
{
ogg_stream_state os;
ogg_page og;
if ((*res = init_read_stream(in, oy, &os, &og, offset, FLACNAME)) <= OGGEDIT_EOF)
return NULL;
int pages = 1;
size_t packets = 0;
ogg_packet **headers = NULL;
while ((headers = headers_alloc(headers, packets)) &&
(pages = read_packet(in, oy, &os, &og, headers[packets], pages)) > OGGEDIT_EOF &&
(headers[packets++]->packet[0] & LASTBLOCK) != LASTBLOCK);
ogg_stream_clear(&os);
if (!headers)
*res = OGGEDIT_ALLOCATION_FAILURE;
else if (!packets || (headers[0]->packet[0] & 0x3F) != VCTYPE)
*res = OGGEDIT_CANNOT_PARSE_HEADERS;
else
*res = pages;
if (*res <= OGGEDIT_EOF) {
clear_header_list(headers);
return NULL;
}
*vendor = parse_vendor(headers[0], 4);
#ifdef HAVE_OGG_STREAM_FLUSH_FILL
size_t bytes = 0;
for (size_t i = 0; i < packets; i++)
bytes += headers[i]->bytes;
if (bytes < MAXPAYLOAD * (pages-1))
headers[0]->bytes = 4;
#else
headers[0]->bytes = 4; // not safe to pad without ogg_stream_flush_fill
#endif
*res = OGGEDIT_OK;
return headers;
}
static long write_metadata_block_packets(FILE *out, const int serial, const char *vendor, const size_t num_tags, char **tags, size_t padding, ogg_packet **metadata)
{
const size_t header_length = vc_size(vendor, num_tags, tags);
if (header_length > (2<<24))
return OGGEDIT_ALLOCATION_FAILURE;
char magic[4];
magic[0] = VCTYPE;
magic[1] = header_length >> 16 & 0xFF;
magic[2] = header_length >> 8 & 0xFF;
magic[3] = header_length & 0xFF;
ogg_packet_clear(metadata[0]);
if (!fill_vc_packet(magic, 4, vendor, num_tags, tags, false, padding, metadata[0]))
return OGGEDIT_ALLOCATION_FAILURE;
ogg_stream_state os;
if (ogg_stream_init(&os, serial))
return OGGEDIT_FAILED_TO_INIT_STREAM;
os.b_o_s = 1;
os.pageno = 1;
for (int i = 0; metadata[i]; i++) {
if (!metadata[i+1])
metadata[i]->packet[0] |= LASTBLOCK;
ogg_stream_packetin(&os, metadata[i]);
}
return flush_stream(out, &os);
}
off_t oggedit_write_flac_metadata(DB_FILE *in, const char *fname, const off_t offset, const int num_tags, char **tags)
{
off_t res;
char tempname[PATH_MAX] = "";
ogg_packet **headers = NULL;
char *vendor = NULL;
ogg_sync_state oy;
ogg_sync_init(&oy);
/* Original file must be writable whichever way we update it */
FILE *out = fopen(fname, "r+b");
if (!out) {
res = OGGEDIT_CANNOT_UPDATE_FILE;
goto cleanup;
}
/* See if we can write the tags packet directly into the existing file ... */
if (!(headers = metadata_block_packets(in, &oy, offset, &vendor, (int *)&res)))
goto cleanup;
const off_t stream_size_k = in->vfs->getlength(in) / 1000; // use file size for now
const size_t metadata_size = 4 + vc_size(vendor, num_tags, tags);
ptrdiff_t padding = headers[0]->bytes - metadata_size;
if (stream_size_k < 1000 || padding < 0 || (headers[1] && padding > 0) || padding > stream_size_k+metadata_size) {
res = open_temp_file(fname, tempname, &out);
if (res) {
goto cleanup;
}
}
/* Re-pad if writing the whole file */
if (*tempname) {
size_t i = 0, j = 0;
while (headers[i]) {
headers[j++] = headers[i];
while (headers[++i] && (headers[i]->packet[0] & 0x3F) == PADTYPE) {
ogg_packet_clear(headers[i]);
free(headers[i]);
}
}
headers[j] = NULL;
padding = headers[1] || stream_size_k < 900 ? 0 : stream_size_k < 10000 ? 1024 : stream_size_k < 100000 ? 8192 : 65536;
}
/* Write pages until we reach the correct comment header */
ogg_page og;
const int flac_serial = copy_up_to_codec(in, out, &oy, &og, *tempname ? 0 : offset, offset, FLACNAME);
if (flac_serial <= OGGEDIT_EOF) {
res = flac_serial;
goto cleanup;
}
if ((res = copy_up_to_header(in, out, &oy, &og, flac_serial)) <= OGGEDIT_EOF)
goto cleanup;
const long pageno = write_metadata_block_packets(out, flac_serial, vendor, num_tags, tags, padding, headers);
if (pageno < OGGEDIT_EOF) {
res = pageno;
goto cleanup;
}
/* If we have tempfile, copy the remaining pages */
if (*tempname) {
if ((res = copy_remaining_pages(in, out, &oy, flac_serial, pageno)) <= OGGEDIT_EOF)
goto cleanup;
if (rename(tempname, fname)) {
res = OGGEDIT_RENAME_FAILED;
goto cleanup;
}
}
res = file_size(fname);
cleanup:
clear_header_list(headers);
cleanup(in, out, &oy, vendor);
if (res < OGGEDIT_OK)
unlink(tempname);
return res;
}
|
