FFmpeg/libavformat/id3v2enc.c
Michael Niedermayer 7a72695c05 Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85'
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85':
  Replace all CODEC_ID_* with AV_CODEC_ID_*
  lavc: add AV prefix to codec ids.

Conflicts:
	doc/APIchanges
	doc/examples/decoding_encoding.c
	doc/examples/muxing.c
	ffmpeg.c
	ffprobe.c
	ffserver.c
	libavcodec/8svx.c
	libavcodec/avcodec.h
	libavcodec/dnxhd_parser.c
	libavcodec/dvdsubdec.c
	libavcodec/error_resilience.c
	libavcodec/h263dec.c
	libavcodec/libvorbisenc.c
	libavcodec/mjpeg_parser.c
	libavcodec/mjpegenc.c
	libavcodec/mpeg12.c
	libavcodec/mpeg4videodec.c
	libavcodec/mpegvideo.c
	libavcodec/mpegvideo_enc.c
	libavcodec/pcm.c
	libavcodec/r210dec.c
	libavcodec/utils.c
	libavcodec/v210dec.c
	libavcodec/version.h
	libavdevice/alsa-audio-dec.c
	libavdevice/bktr.c
	libavdevice/v4l2.c
	libavformat/asfdec.c
	libavformat/asfenc.c
	libavformat/avformat.h
	libavformat/avidec.c
	libavformat/caf.c
	libavformat/electronicarts.c
	libavformat/flacdec.c
	libavformat/flvdec.c
	libavformat/flvenc.c
	libavformat/framecrcenc.c
	libavformat/img2.c
	libavformat/img2dec.c
	libavformat/img2enc.c
	libavformat/ipmovie.c
	libavformat/isom.c
	libavformat/matroska.c
	libavformat/matroskadec.c
	libavformat/matroskaenc.c
	libavformat/mov.c
	libavformat/movenc.c
	libavformat/mp3dec.c
	libavformat/mpeg.c
	libavformat/mpegts.c
	libavformat/mxf.c
	libavformat/mxfdec.c
	libavformat/mxfenc.c
	libavformat/nsvdec.c
	libavformat/nut.c
	libavformat/oggenc.c
	libavformat/pmpdec.c
	libavformat/rawdec.c
	libavformat/rawenc.c
	libavformat/riff.c
	libavformat/sdp.c
	libavformat/utils.c
	libavformat/vocenc.c
	libavformat/wtv.c
	libavformat/xmv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-08-07 22:45:46 +02:00

285 lines
8.6 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 "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 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);
}
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
{
AVDictionaryEntry *t = NULL;
int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
ID3v2_ENCODING_UTF8;
ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
if (id3->version == 3)
id3v2_3_metadata_split_date(&s->metadata);
else if (id3->version == 4)
ff_metadata_conv(&s->metadata, ff_id3v2_4_metadata_conv, NULL);
while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
int ret;
if ((ret = id3v2_check_write_tag(id3, s->pb, t, ff_id3v2_tags, enc)) > 0) {
id3->len += ret;
continue;
}
if ((ret = id3v2_check_write_tag(id3, s->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, s->pb, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
return ret;
id3->len += 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->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;
/* 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)
{
int64_t 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);
return 0;
}