4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/avstring.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
29 #include "avio_internal.h"
32 #define PADDING_BYTES 10
34 static void id3v2_put_size(AVIOContext *pb, int size)
36 avio_w8(pb, size >> 21 & 0x7f);
37 avio_w8(pb, size >> 14 & 0x7f);
38 avio_w8(pb, size >> 7 & 0x7f);
39 avio_w8(pb, size & 0x7f);
42 static int string_is_ascii(const uint8_t *str)
44 while (*str && *str < 128) str++;
48 static void id3v2_encode_string(AVIOContext *pb, const uint8_t *str,
49 enum ID3v2Encoding enc)
51 int (*put)(AVIOContext*, const char*);
53 if (enc == ID3v2_ENCODING_UTF16BOM) {
54 avio_wl16(pb, 0xFEFF); /* BOM */
55 put = avio_put_str16le;
63 * Write a text frame with one (normal frames) or two (TXXX frames) strings
64 * according to encoding (only UTF-8 or UTF-16+BOM supported).
65 * @return number of bytes written or a negative error code.
67 static int id3v2_put_ttag(ID3v2EncContext *id3, AVIOContext *avioc, const char *str1, const char *str2,
68 uint32_t tag, enum ID3v2Encoding enc)
73 if (avio_open_dyn_buf(&dyn_buf) < 0)
74 return AVERROR(ENOMEM);
76 /* check if the strings are ASCII-only and use UTF16 only if
78 if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) &&
79 (!str2 || string_is_ascii(str2)))
80 enc = ID3v2_ENCODING_ISO8859;
82 avio_w8(dyn_buf, enc);
83 id3v2_encode_string(dyn_buf, str1, enc);
85 id3v2_encode_string(dyn_buf, str2, enc);
86 len = avio_close_dyn_buf(dyn_buf, &pb);
88 avio_wb32(avioc, tag);
89 /* ID3v2.3 frame size is not synchsafe */
90 if (id3->version == 3)
91 avio_wb32(avioc, len);
93 id3v2_put_size(avioc, len);
95 avio_write(avioc, pb, len);
98 return len + ID3v2_HEADER_SIZE;
101 static int id3v2_check_write_tag(ID3v2EncContext *id3, AVIOContext *pb, AVDictionaryEntry *t,
102 const char table[][4], enum ID3v2Encoding enc)
107 if (t->key[0] != 'T' || strlen(t->key) != 4)
109 tag = AV_RB32(t->key);
110 for (i = 0; *table[i]; i++)
111 if (tag == AV_RB32(table[i]))
112 return id3v2_put_ttag(id3, pb, t->value, NULL, tag, enc);
116 static void id3v2_3_metadata_split_date(AVDictionary **pm)
118 AVDictionaryEntry *mtag = NULL;
119 AVDictionary *dst = NULL;
120 const char *key, *value;
121 char year[5] = {0}, day_month[5] = {0};
124 while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
126 if (!av_strcasecmp(key, "date")) {
127 /* split date tag using "YYYY-MM-DD" format into year and month/day segments */
130 while (value[i] >= '0' && value[i] <= '9') i++;
131 if (value[i] == '\0' || value[i] == '-') {
132 av_strlcpy(year, value, sizeof(year));
133 av_dict_set(&dst, "TYER", year, 0);
135 if (value[i] == '-' &&
136 value[i+1] >= '0' && value[i+1] <= '1' &&
137 value[i+2] >= '0' && value[i+2] <= '9' &&
139 value[i+4] >= '0' && value[i+4] <= '3' &&
140 value[i+5] >= '0' && value[i+5] <= '9' &&
141 (value[i+6] == '\0' || value[i+6] == ' ')) {
142 snprintf(day_month, sizeof(day_month), "%.2s%.2s", value + i + 4, value + i + 1);
143 av_dict_set(&dst, "TDAT", day_month, 0);
146 av_dict_set(&dst, key, value, 0);
148 av_dict_set(&dst, key, mtag->value, 0);
154 void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version,
157 id3->version = id3v2_version;
159 avio_wb32(pb, MKBETAG(magic[0], magic[1], magic[2], id3v2_version));
161 avio_w8(pb, 0); /* flags */
163 /* reserve space for size */
164 id3->size_pos = avio_tell(pb);
168 static int write_metadata(AVIOContext *pb, AVDictionary **metadata,
169 ID3v2EncContext *id3, int enc)
171 AVDictionaryEntry *t = NULL;
174 ff_metadata_conv(metadata, ff_id3v2_34_metadata_conv, NULL);
175 if (id3->version == 3)
176 id3v2_3_metadata_split_date(metadata);
177 else if (id3->version == 4)
178 ff_metadata_conv(metadata, ff_id3v2_4_metadata_conv, NULL);
180 while ((t = av_dict_get(*metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
181 if ((ret = id3v2_check_write_tag(id3, pb, t, ff_id3v2_tags, enc)) > 0) {
185 if ((ret = id3v2_check_write_tag(id3, pb, t, id3->version == 3 ?
186 ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
191 /* unknown tag, write as TXXX frame */
192 if ((ret = id3v2_put_ttag(id3, pb, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
200 static int write_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc)
202 const AVRational time_base = {1, 1000};
203 AVChapter *ch = s->chapters[id];
204 uint8_t *dyn_buf = NULL;
205 AVIOContext *dyn_bc = NULL;
207 int len, start, end, ret;
209 if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
212 start = av_rescale_q(ch->start, ch->time_base, time_base);
213 end = av_rescale_q(ch->end, ch->time_base, time_base);
215 snprintf(name, 122, "ch%d", id);
216 id3->len += avio_put_str(dyn_bc, name);
217 avio_wb32(dyn_bc, start);
218 avio_wb32(dyn_bc, end);
219 avio_wb32(dyn_bc, 0xFFFFFFFFu);
220 avio_wb32(dyn_bc, 0xFFFFFFFFu);
222 if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0)
225 len = avio_close_dyn_buf(dyn_bc, &dyn_buf);
226 id3->len += 16 + ID3v2_HEADER_SIZE;
228 avio_wb32(s->pb, MKBETAG('C', 'H', 'A', 'P'));
229 avio_wb32(s->pb, len);
231 avio_write(s->pb, dyn_buf, len);
234 if (dyn_bc && !dyn_buf)
235 avio_close_dyn_buf(dyn_bc, &dyn_buf);
241 int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
243 int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
247 if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0)
250 for (i = 0; i < s->nb_chapters; i++) {
251 if ((ret = write_chapter(s, id3, i, enc)) < 0)
258 int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt)
260 AVStream *st = s->streams[pkt->stream_index];
261 AVDictionaryEntry *e;
263 AVIOContext *dyn_buf;
265 const CodecMime *mime = ff_id3v2_mime_tags;
266 const char *mimetype = NULL, *desc = "";
267 int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
269 int i, len, type = 0;
271 /* get the mimetype*/
272 while (mime->id != AV_CODEC_ID_NONE) {
273 if (mime->id == st->codec->codec_id) {
274 mimetype = mime->str;
280 av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
281 "write an attached picture.\n", st->index);
282 return AVERROR(EINVAL);
285 /* get the picture type */
286 e = av_dict_get(st->metadata, "comment", NULL, 0);
287 for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
288 if (strstr(ff_id3v2_picture_types[i], e->value) == ff_id3v2_picture_types[i]) {
294 /* get the description */
295 if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
298 /* use UTF16 only for non-ASCII strings */
299 if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(desc))
300 enc = ID3v2_ENCODING_ISO8859;
303 if (avio_open_dyn_buf(&dyn_buf) < 0)
304 return AVERROR(ENOMEM);
306 avio_w8(dyn_buf, enc);
307 avio_put_str(dyn_buf, mimetype);
308 avio_w8(dyn_buf, type);
309 id3v2_encode_string(dyn_buf, desc, enc);
310 avio_write(dyn_buf, pkt->data, pkt->size);
311 len = avio_close_dyn_buf(dyn_buf, &buf);
313 avio_wb32(s->pb, MKBETAG('A', 'P', 'I', 'C'));
314 if (id3->version == 3)
315 avio_wb32(s->pb, len);
317 id3v2_put_size(s->pb, len);
319 avio_write(s->pb, buf, len);
322 id3->len += len + ID3v2_HEADER_SIZE;
327 void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb)
331 /* adding an arbitrary amount of padding bytes at the end of the
332 * ID3 metadata fixes cover art display for some software (iTunes,
333 * Traktor, Serato, Torq) */
334 ffio_fill(pb, 0, PADDING_BYTES);
335 id3->len += PADDING_BYTES;
337 cur_pos = avio_tell(pb);
338 avio_seek(pb, id3->size_pos, SEEK_SET);
339 id3v2_put_size(pb, id3->len);
340 avio_seek(pb, cur_pos, SEEK_SET);
343 int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version,
346 ID3v2EncContext id3 = { 0 };
349 ff_id3v2_start(&id3, s->pb, id3v2_version, magic);
350 if ((ret = ff_id3v2_write_metadata(s, &id3)) < 0)
352 ff_id3v2_finish(&id3, s->pb);