0,0 → 1,355 |
/* |
* ID3v2 header writer |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include <stdint.h> |
#include <string.h> |
|
#include "libavutil/avstring.h" |
#include "libavutil/dict.h" |
#include "libavutil/intreadwrite.h" |
#include "avformat.h" |
#include "avio.h" |
#include "avio_internal.h" |
#include "id3v2.h" |
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#define PADDING_BYTES 10 |
|
static void id3v2_put_size(AVIOContext *pb, int size) |
{ |
avio_w8(pb, size >> 21 & 0x7f); |
avio_w8(pb, size >> 14 & 0x7f); |
avio_w8(pb, size >> 7 & 0x7f); |
avio_w8(pb, size & 0x7f); |
} |
|
static int string_is_ascii(const uint8_t *str) |
{ |
while (*str && *str < 128) str++; |
return !*str; |
} |
|
static void id3v2_encode_string(AVIOContext *pb, const uint8_t *str, |
enum ID3v2Encoding enc) |
{ |
int (*put)(AVIOContext*, const char*); |
|
if (enc == ID3v2_ENCODING_UTF16BOM) { |
avio_wl16(pb, 0xFEFF); /* BOM */ |
put = avio_put_str16le; |
} else |
put = avio_put_str; |
|
put(pb, str); |
} |
|
/** |
* Write a text frame with one (normal frames) or two (TXXX frames) strings |
* according to encoding (only UTF-8 or UTF-16+BOM supported). |
* @return number of bytes written or a negative error code. |
*/ |
static int id3v2_put_ttag(ID3v2EncContext *id3, AVIOContext *avioc, const char *str1, const char *str2, |
uint32_t tag, enum ID3v2Encoding enc) |
{ |
int len; |
uint8_t *pb; |
AVIOContext *dyn_buf; |
if (avio_open_dyn_buf(&dyn_buf) < 0) |
return AVERROR(ENOMEM); |
|
/* check if the strings are ASCII-only and use UTF16 only if |
* they're not */ |
if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) && |
(!str2 || string_is_ascii(str2))) |
enc = ID3v2_ENCODING_ISO8859; |
|
avio_w8(dyn_buf, enc); |
id3v2_encode_string(dyn_buf, str1, enc); |
if (str2) |
id3v2_encode_string(dyn_buf, str2, enc); |
len = avio_close_dyn_buf(dyn_buf, &pb); |
|
avio_wb32(avioc, tag); |
/* ID3v2.3 frame size is not synchsafe */ |
if (id3->version == 3) |
avio_wb32(avioc, len); |
else |
id3v2_put_size(avioc, len); |
avio_wb16(avioc, 0); |
avio_write(avioc, pb, len); |
|
av_freep(&pb); |
return len + ID3v2_HEADER_SIZE; |
} |
|
static int id3v2_check_write_tag(ID3v2EncContext *id3, AVIOContext *pb, AVDictionaryEntry *t, |
const char table[][4], enum ID3v2Encoding enc) |
{ |
uint32_t tag; |
int i; |
|
if (t->key[0] != 'T' || strlen(t->key) != 4) |
return -1; |
tag = AV_RB32(t->key); |
for (i = 0; *table[i]; i++) |
if (tag == AV_RB32(table[i])) |
return id3v2_put_ttag(id3, pb, t->value, NULL, tag, enc); |
return -1; |
} |
|
static void id3v2_3_metadata_split_date(AVDictionary **pm) |
{ |
AVDictionaryEntry *mtag = NULL; |
AVDictionary *dst = NULL; |
const char *key, *value; |
char year[5] = {0}, day_month[5] = {0}; |
int i; |
|
while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) { |
key = mtag->key; |
if (!av_strcasecmp(key, "date")) { |
/* split date tag using "YYYY-MM-DD" format into year and month/day segments */ |
value = mtag->value; |
i = 0; |
while (value[i] >= '0' && value[i] <= '9') i++; |
if (value[i] == '\0' || value[i] == '-') { |
av_strlcpy(year, value, sizeof(year)); |
av_dict_set(&dst, "TYER", year, 0); |
|
if (value[i] == '-' && |
value[i+1] >= '0' && value[i+1] <= '1' && |
value[i+2] >= '0' && value[i+2] <= '9' && |
value[i+3] == '-' && |
value[i+4] >= '0' && value[i+4] <= '3' && |
value[i+5] >= '0' && value[i+5] <= '9' && |
(value[i+6] == '\0' || value[i+6] == ' ')) { |
snprintf(day_month, sizeof(day_month), "%.2s%.2s", value + i + 4, value + i + 1); |
av_dict_set(&dst, "TDAT", day_month, 0); |
} |
} else |
av_dict_set(&dst, key, value, 0); |
} else |
av_dict_set(&dst, key, mtag->value, 0); |
} |
av_dict_free(pm); |
*pm = dst; |
} |
|
void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version, |
const char *magic) |
{ |
id3->version = id3v2_version; |
|
avio_wb32(pb, MKBETAG(magic[0], magic[1], magic[2], id3v2_version)); |
avio_w8(pb, 0); |
avio_w8(pb, 0); /* flags */ |
|
/* reserve space for size */ |
id3->size_pos = avio_tell(pb); |
avio_wb32(pb, 0); |
} |
|
static int write_metadata(AVIOContext *pb, AVDictionary **metadata, |
ID3v2EncContext *id3, int enc) |
{ |
AVDictionaryEntry *t = NULL; |
int ret; |
|
ff_metadata_conv(metadata, ff_id3v2_34_metadata_conv, NULL); |
if (id3->version == 3) |
id3v2_3_metadata_split_date(metadata); |
else if (id3->version == 4) |
ff_metadata_conv(metadata, ff_id3v2_4_metadata_conv, NULL); |
|
while ((t = av_dict_get(*metadata, "", t, AV_DICT_IGNORE_SUFFIX))) { |
if ((ret = id3v2_check_write_tag(id3, pb, t, ff_id3v2_tags, enc)) > 0) { |
id3->len += ret; |
continue; |
} |
if ((ret = id3v2_check_write_tag(id3, pb, t, id3->version == 3 ? |
ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) { |
id3->len += ret; |
continue; |
} |
|
/* unknown tag, write as TXXX frame */ |
if ((ret = id3v2_put_ttag(id3, pb, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0) |
return ret; |
id3->len += ret; |
} |
|
return 0; |
} |
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static int write_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc) |
{ |
const AVRational time_base = {1, 1000}; |
AVChapter *ch = s->chapters[id]; |
uint8_t *dyn_buf = NULL; |
AVIOContext *dyn_bc = NULL; |
char name[123]; |
int len, start, end, ret; |
|
if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0) |
goto fail; |
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start = av_rescale_q(ch->start, ch->time_base, time_base); |
end = av_rescale_q(ch->end, ch->time_base, time_base); |
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snprintf(name, 122, "ch%d", id); |
id3->len += avio_put_str(dyn_bc, name); |
avio_wb32(dyn_bc, start); |
avio_wb32(dyn_bc, end); |
avio_wb32(dyn_bc, 0xFFFFFFFFu); |
avio_wb32(dyn_bc, 0xFFFFFFFFu); |
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if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0) |
goto fail; |
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len = avio_close_dyn_buf(dyn_bc, &dyn_buf); |
id3->len += 16 + ID3v2_HEADER_SIZE; |
|
avio_wb32(s->pb, MKBETAG('C', 'H', 'A', 'P')); |
avio_wb32(s->pb, len); |
avio_wb16(s->pb, 0); |
avio_write(s->pb, dyn_buf, len); |
|
fail: |
if (dyn_bc && !dyn_buf) |
avio_close_dyn_buf(dyn_bc, &dyn_buf); |
av_freep(&dyn_buf); |
|
return ret; |
} |
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int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3) |
{ |
int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM : |
ID3v2_ENCODING_UTF8; |
int i, ret; |
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if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0) |
return ret; |
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for (i = 0; i < s->nb_chapters; i++) { |
if ((ret = write_chapter(s, id3, i, enc)) < 0) |
return ret; |
} |
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return 0; |
} |
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int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt) |
{ |
AVStream *st = s->streams[pkt->stream_index]; |
AVDictionaryEntry *e; |
|
AVIOContext *dyn_buf; |
uint8_t *buf; |
const CodecMime *mime = ff_id3v2_mime_tags; |
const char *mimetype = NULL, *desc = ""; |
int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM : |
ID3v2_ENCODING_UTF8; |
int i, len, type = 0; |
|
/* get the mimetype*/ |
while (mime->id != AV_CODEC_ID_NONE) { |
if (mime->id == st->codec->codec_id) { |
mimetype = mime->str; |
break; |
} |
mime++; |
} |
if (!mimetype) { |
av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot " |
"write an attached picture.\n", st->index); |
return AVERROR(EINVAL); |
} |
|
/* get the picture type */ |
e = av_dict_get(st->metadata, "comment", NULL, 0); |
for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) { |
if (strstr(ff_id3v2_picture_types[i], e->value) == ff_id3v2_picture_types[i]) { |
type = i; |
break; |
} |
} |
|
/* get the description */ |
if ((e = av_dict_get(st->metadata, "title", NULL, 0))) |
desc = e->value; |
|
/* use UTF16 only for non-ASCII strings */ |
if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(desc)) |
enc = ID3v2_ENCODING_ISO8859; |
|
/* start writing */ |
if (avio_open_dyn_buf(&dyn_buf) < 0) |
return AVERROR(ENOMEM); |
|
avio_w8(dyn_buf, enc); |
avio_put_str(dyn_buf, mimetype); |
avio_w8(dyn_buf, type); |
id3v2_encode_string(dyn_buf, desc, enc); |
avio_write(dyn_buf, pkt->data, pkt->size); |
len = avio_close_dyn_buf(dyn_buf, &buf); |
|
avio_wb32(s->pb, MKBETAG('A', 'P', 'I', 'C')); |
if (id3->version == 3) |
avio_wb32(s->pb, len); |
else |
id3v2_put_size(s->pb, len); |
avio_wb16(s->pb, 0); |
avio_write(s->pb, buf, len); |
av_freep(&buf); |
|
id3->len += len + ID3v2_HEADER_SIZE; |
|
return 0; |
} |
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void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb) |
{ |
int64_t cur_pos; |
|
/* adding an arbitrary amount of padding bytes at the end of the |
* ID3 metadata fixes cover art display for some software (iTunes, |
* Traktor, Serato, Torq) */ |
ffio_fill(pb, 0, PADDING_BYTES); |
id3->len += PADDING_BYTES; |
|
cur_pos = avio_tell(pb); |
avio_seek(pb, id3->size_pos, SEEK_SET); |
id3v2_put_size(pb, id3->len); |
avio_seek(pb, cur_pos, SEEK_SET); |
} |
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int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version, |
const char *magic) |
{ |
ID3v2EncContext id3 = { 0 }; |
int ret; |
|
ff_id3v2_start(&id3, s->pb, id3v2_version, magic); |
if ((ret = ff_id3v2_write_metadata(s, &id3)) < 0) |
return ret; |
ff_id3v2_finish(&id3, s->pb); |
|
return 0; |
} |