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"
31 static void id3v2_put_size(AVIOContext *pb, int size)
33 avio_w8(pb, size >> 21 & 0x7f);
34 avio_w8(pb, size >> 14 & 0x7f);
35 avio_w8(pb, size >> 7 & 0x7f);
36 avio_w8(pb, size & 0x7f);
39 static int string_is_ascii(const uint8_t *str)
41 while (*str && *str < 128) str++;
45 static void id3v2_encode_string(AVIOContext *pb, const uint8_t *str,
46 enum ID3v2Encoding enc)
48 int (*put)(AVIOContext*, const char*);
50 if (enc == ID3v2_ENCODING_UTF16BOM) {
51 avio_wl16(pb, 0xFEFF); /* BOM */
52 put = avio_put_str16le;
60 * Write a text frame with one (normal frames) or two (TXXX frames) strings
61 * according to encoding (only UTF-8 or UTF-16+BOM supported).
62 * @return number of bytes written or a negative error code.
64 static int id3v2_put_ttag(ID3v2EncContext *id3, AVIOContext *avioc, const char *str1, const char *str2,
65 uint32_t tag, enum ID3v2Encoding enc)
70 if (avio_open_dyn_buf(&dyn_buf) < 0)
71 return AVERROR(ENOMEM);
73 /* check if the strings are ASCII-only and use UTF16 only if
75 if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) &&
76 (!str2 || string_is_ascii(str2)))
77 enc = ID3v2_ENCODING_ISO8859;
79 avio_w8(dyn_buf, enc);
80 id3v2_encode_string(dyn_buf, str1, enc);
82 id3v2_encode_string(dyn_buf, str2, enc);
83 len = avio_close_dyn_buf(dyn_buf, &pb);
85 avio_wb32(avioc, tag);
86 /* ID3v2.3 frame size is not synchsafe */
87 if (id3->version == 3)
88 avio_wb32(avioc, len);
90 id3v2_put_size(avioc, len);
92 avio_write(avioc, pb, len);
95 return len + ID3v2_HEADER_SIZE;
98 static int id3v2_check_write_tag(ID3v2EncContext *id3, AVIOContext *pb, AVDictionaryEntry *t,
99 const char table[][4], enum ID3v2Encoding enc)
104 if (t->key[0] != 'T' || strlen(t->key) != 4)
106 tag = AV_RB32(t->key);
107 for (i = 0; *table[i]; i++)
108 if (tag == AV_RB32(table[i]))
109 return id3v2_put_ttag(id3, pb, t->value, NULL, tag, enc);
113 static void id3v2_3_metadata_split_date(AVDictionary **pm)
115 AVDictionaryEntry *mtag = NULL;
116 AVDictionary *dst = NULL;
117 const char *key, *value;
118 char year[5] = {0}, day_month[5] = {0};
121 while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
123 if (!av_strcasecmp(key, "date")) {
124 /* split date tag using "YYYY-MM-DD" format into year and month/day segments */
127 while (value[i] >= '0' && value[i] <= '9') i++;
128 if (value[i] == '\0' || value[i] == '-') {
129 av_strlcpy(year, value, sizeof(year));
130 av_dict_set(&dst, "TYER", year, 0);
132 if (value[i] == '-' &&
133 value[i+1] >= '0' && value[i+1] <= '1' &&
134 value[i+2] >= '0' && value[i+2] <= '9' &&
136 value[i+4] >= '0' && value[i+4] <= '3' &&
137 value[i+5] >= '0' && value[i+5] <= '9' &&
138 (value[i+6] == '\0' || value[i+6] == ' ')) {
139 snprintf(day_month, sizeof(day_month), "%.2s%.2s", value + i + 4, value + i + 1);
140 av_dict_set(&dst, "TDAT", day_month, 0);
143 av_dict_set(&dst, key, value, 0);
145 av_dict_set(&dst, key, mtag->value, 0);
151 void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version,
154 id3->version = id3v2_version;
156 avio_wb32(pb, MKBETAG(magic[0], magic[1], magic[2], id3v2_version));
158 avio_w8(pb, 0); /* flags */
160 /* reserve space for size */
161 id3->size_pos = avio_tell(pb);
165 static int write_metadata(AVIOContext *pb, AVDictionary **metadata,
166 ID3v2EncContext *id3, int enc)
168 AVDictionaryEntry *t = NULL;
171 ff_metadata_conv(metadata, ff_id3v2_34_metadata_conv, NULL);
172 if (id3->version == 3)
173 id3v2_3_metadata_split_date(metadata);
174 else if (id3->version == 4)
175 ff_metadata_conv(metadata, ff_id3v2_4_metadata_conv, NULL);
177 while ((t = av_dict_get(*metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
178 if ((ret = id3v2_check_write_tag(id3, pb, t, ff_id3v2_tags, enc)) > 0) {
182 if ((ret = id3v2_check_write_tag(id3, pb, t, id3->version == 3 ?
183 ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
188 /* unknown tag, write as TXXX frame */
189 if ((ret = id3v2_put_ttag(id3, pb, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
197 static int write_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc)
199 const AVRational time_base = {1, 1000};
200 AVChapter *ch = s->chapters[id];
201 uint8_t *dyn_buf = NULL;
202 AVIOContext *dyn_bc = NULL;
204 int len, start, end, ret;
206 if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
209 start = av_rescale_q(ch->start, ch->time_base, time_base);
210 end = av_rescale_q(ch->end, ch->time_base, time_base);
212 snprintf(name, 122, "ch%d", id);
213 id3->len += avio_put_str(dyn_bc, name);
214 avio_wb32(dyn_bc, start);
215 avio_wb32(dyn_bc, end);
216 avio_wb32(dyn_bc, 0xFFFFFFFFu);
217 avio_wb32(dyn_bc, 0xFFFFFFFFu);
219 if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0)
222 len = avio_close_dyn_buf(dyn_bc, &dyn_buf);
223 id3->len += 16 + ID3v2_HEADER_SIZE;
225 avio_wb32(s->pb, MKBETAG('C', 'H', 'A', 'P'));
226 avio_wb32(s->pb, len);
228 avio_write(s->pb, dyn_buf, len);
231 if (dyn_bc && !dyn_buf)
232 avio_close_dyn_buf(dyn_bc, &dyn_buf);
238 int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
240 int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
244 if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0)
247 for (i = 0; i < s->nb_chapters; i++) {
248 if ((ret = write_chapter(s, id3, i, enc)) < 0)
255 int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt)
257 AVStream *st = s->streams[pkt->stream_index];
258 AVDictionaryEntry *e;
260 AVIOContext *dyn_buf;
262 const CodecMime *mime = ff_id3v2_mime_tags;
263 const char *mimetype = NULL, *desc = "";
264 int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
266 int i, len, type = 0;
268 /* get the mimetype*/
269 while (mime->id != AV_CODEC_ID_NONE) {
270 if (mime->id == st->codec->codec_id) {
271 mimetype = mime->str;
277 av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
278 "write an attached picture.\n", st->index);
279 return AVERROR(EINVAL);
282 /* get the picture type */
283 e = av_dict_get(st->metadata, "comment", NULL, 0);
284 for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
285 if (strstr(ff_id3v2_picture_types[i], e->value) == ff_id3v2_picture_types[i]) {
291 /* get the description */
292 if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
296 if (avio_open_dyn_buf(&dyn_buf) < 0)
297 return AVERROR(ENOMEM);
299 avio_w8(dyn_buf, enc);
300 avio_put_str(dyn_buf, mimetype);
301 avio_w8(dyn_buf, type);
302 id3v2_encode_string(dyn_buf, desc, enc);
303 avio_write(dyn_buf, pkt->data, pkt->size);
304 len = avio_close_dyn_buf(dyn_buf, &buf);
306 avio_wb32(s->pb, MKBETAG('A', 'P', 'I', 'C'));
307 if (id3->version == 3)
308 avio_wb32(s->pb, len);
310 id3v2_put_size(s->pb, len);
312 avio_write(s->pb, buf, len);
315 id3->len += len + ID3v2_HEADER_SIZE;
320 void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb)
322 int64_t cur_pos = avio_tell(pb);
323 avio_seek(pb, id3->size_pos, SEEK_SET);
324 id3v2_put_size(pb, id3->len);
325 avio_seek(pb, cur_pos, SEEK_SET);
328 int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version,
331 ID3v2EncContext id3 = { 0 };
334 ff_id3v2_start(&id3, s->pb, id3v2_version, magic);
335 if ((ret = ff_id3v2_write_metadata(s, &id3)) < 0)
337 ff_id3v2_finish(&id3, s->pb);