mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-28 12:16:12 +02:00
462 lines
14 KiB
C
462 lines
14 KiB
C
/*
|
|
* 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"
|
|
|
|
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 sync-safe */
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Write a priv frame with owner and data. 'key' is the owner prepended with
|
|
* ID3v2_PRIV_METADATA_PREFIX. 'data' is provided as a string. Any \xXX
|
|
* (where 'X' is a valid hex digit) will be unescaped to the byte value.
|
|
*/
|
|
static int id3v2_put_priv(ID3v2EncContext *id3, AVIOContext *avioc, const char *key, const char *data)
|
|
{
|
|
int len;
|
|
uint8_t *pb;
|
|
AVIOContext *dyn_buf;
|
|
|
|
if (!av_strstart(key, ID3v2_PRIV_METADATA_PREFIX, &key)) {
|
|
return 0;
|
|
}
|
|
|
|
if (avio_open_dyn_buf(&dyn_buf) < 0)
|
|
return AVERROR(ENOMEM);
|
|
|
|
// owner + null byte.
|
|
avio_write(dyn_buf, key, strlen(key) + 1);
|
|
|
|
while (*data) {
|
|
if (av_strstart(data, "\\x", &data)) {
|
|
if (data[0] && data[1] && av_isxdigit(data[0]) && av_isxdigit(data[1])) {
|
|
char digits[] = {data[0], data[1], 0};
|
|
avio_w8(dyn_buf, strtol(digits, NULL, 16));
|
|
data += 2;
|
|
} else {
|
|
ffio_free_dyn_buf(&dyn_buf);
|
|
av_log(avioc, AV_LOG_ERROR, "Invalid escape '\\x%.2s' in metadata tag '"
|
|
ID3v2_PRIV_METADATA_PREFIX "%s'.\n", data, key);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
} else {
|
|
avio_write(dyn_buf, data++, 1);
|
|
}
|
|
}
|
|
|
|
len = avio_close_dyn_buf(dyn_buf, &pb);
|
|
|
|
avio_wb32(avioc, MKBETAG('P', 'R', 'I', 'V'));
|
|
if (id3->version == 3)
|
|
avio_wb32(avioc, len);
|
|
else
|
|
id3v2_put_size(avioc, len);
|
|
avio_wb16(avioc, 0);
|
|
avio_write(avioc, pb, len);
|
|
|
|
av_free(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;
|
|
}
|
|
|
|
if ((ret = id3v2_put_priv(id3, pb, t->key, t->value)) > 0) {
|
|
id3->len += ret;
|
|
continue;
|
|
} else if (ret < 0) {
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static int write_ctoc(AVFormatContext *s, ID3v2EncContext *id3, int enc)
|
|
{
|
|
uint8_t *dyn_buf = NULL;
|
|
AVIOContext *dyn_bc = NULL;
|
|
char name[123];
|
|
int len, ret;
|
|
|
|
if (s->nb_chapters == 0)
|
|
return 0;
|
|
|
|
if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
|
|
goto fail;
|
|
|
|
id3->len += avio_put_str(dyn_bc, "toc");
|
|
avio_w8(dyn_bc, 0x03);
|
|
avio_w8(dyn_bc, s->nb_chapters);
|
|
for (int i = 0; i < s->nb_chapters; i++) {
|
|
snprintf(name, 122, "ch%d", i);
|
|
id3->len += avio_put_str(dyn_bc, name);
|
|
}
|
|
len = avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
id3->len += 16 + ID3v2_HEADER_SIZE;
|
|
|
|
avio_wb32(s->pb, MKBETAG('C', 'T', 'O', 'C'));
|
|
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;
|
|
}
|
|
|
|
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;
|
|
|
|
start = av_rescale_q(ch->start, ch->time_base, time_base);
|
|
end = av_rescale_q(ch->end, ch->time_base, time_base);
|
|
|
|
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);
|
|
|
|
if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0)
|
|
goto fail;
|
|
|
|
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;
|
|
}
|
|
|
|
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
|
|
{
|
|
int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
|
|
ID3v2_ENCODING_UTF8;
|
|
int i, ret;
|
|
|
|
ff_standardize_creation_time(s);
|
|
if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0)
|
|
return ret;
|
|
|
|
if ((ret = write_ctoc(s, id3, enc)) < 0)
|
|
return ret;
|
|
|
|
for (i = 0; i < s->nb_chapters; i++) {
|
|
if ((ret = write_chapter(s, id3, i, enc)) < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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->codecpar->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 (!av_strcasecmp(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;
|
|
}
|
|
|
|
void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb,
|
|
int padding_bytes)
|
|
{
|
|
int64_t cur_pos;
|
|
|
|
if (padding_bytes < 0)
|
|
padding_bytes = 10;
|
|
|
|
/* The ID3v2.3 specification states that 28 bits are used to represent the
|
|
* size of the whole tag. Therefore the current size of the tag needs to be
|
|
* subtracted from the upper limit of 2^28-1 to clip the value correctly. */
|
|
/* The minimum of 10 is an arbitrary amount of padding at the end of the tag
|
|
* to fix cover art display with some software such as iTunes, Traktor,
|
|
* Serato, Torq. */
|
|
padding_bytes = av_clip(padding_bytes, 10, 268435455 - id3->len);
|
|
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);
|
|
}
|
|
|
|
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, s->metadata_header_padding);
|
|
|
|
return 0;
|
|
}
|