FFmpeg/libavformat/id3v2enc.c

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/*
* 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;
}
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);
Merge remote-tracking branch 'qatar/master' * qatar/master: (58 commits) amrnbdec: check frame size before decoding. cscd: use negative error values to indicate decode_init() failures. h264: prevent overreads in intra PCM decoding. FATE: do not decode audio in the nuv test. dxa: set audio stream time base using the sample rate psx-str: do not allow seeking by bytes asfdec: Do not set AVCodecContext.frame_size vqf: set packet parameters after av_new_packet() mpegaudiodec: use DSPUtil.butterflies_float(). FATE: add mp3 test for sample that exhibited false overreads fate: add cdxl test for bit line plane arrangement vmnc: return error on decode_init() failure. libvorbis: add/update error messages libvorbis: use AVFifoBuffer for output packet buffer libvorbis: remove unneeded e_o_s check libvorbis: check return values for functions that can return errors libvorbis: use float input instead of s16 libvorbis: do not flush libvorbis analysis if dsp state was not initialized libvorbis: use VBR by default, with default quality of 3 libvorbis: fix use of minrate/maxrate AVOptions ... Conflicts: Changelog doc/APIchanges libavcodec/avcodec.h libavcodec/dpxenc.c libavcodec/libvorbis.c libavcodec/vmnc.c libavformat/asfdec.c libavformat/id3v2enc.c libavformat/internal.h libavformat/mp3enc.c libavformat/utils.c libavformat/version.h libswscale/utils.c tests/fate/video.mak tests/ref/fate/nuv tests/ref/fate/prores-alpha tests/ref/lavf/ffm tests/ref/vsynth1/prores tests/ref/vsynth2/prores Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-03-01 00:13:16 +00:00
if (id3->version == 3)
id3v2_3_metadata_split_date(metadata);
Merge remote-tracking branch 'qatar/master' * qatar/master: (58 commits) amrnbdec: check frame size before decoding. cscd: use negative error values to indicate decode_init() failures. h264: prevent overreads in intra PCM decoding. FATE: do not decode audio in the nuv test. dxa: set audio stream time base using the sample rate psx-str: do not allow seeking by bytes asfdec: Do not set AVCodecContext.frame_size vqf: set packet parameters after av_new_packet() mpegaudiodec: use DSPUtil.butterflies_float(). FATE: add mp3 test for sample that exhibited false overreads fate: add cdxl test for bit line plane arrangement vmnc: return error on decode_init() failure. libvorbis: add/update error messages libvorbis: use AVFifoBuffer for output packet buffer libvorbis: remove unneeded e_o_s check libvorbis: check return values for functions that can return errors libvorbis: use float input instead of s16 libvorbis: do not flush libvorbis analysis if dsp state was not initialized libvorbis: use VBR by default, with default quality of 3 libvorbis: fix use of minrate/maxrate AVOptions ... Conflicts: Changelog doc/APIchanges libavcodec/avcodec.h libavcodec/dpxenc.c libavcodec/libvorbis.c libavcodec/vmnc.c libavformat/asfdec.c libavformat/id3v2enc.c libavformat/internal.h libavformat/mp3enc.c libavformat/utils.c libavformat/version.h libswscale/utils.c tests/fate/video.mak tests/ref/fate/nuv tests/ref/fate/prores-alpha tests/ref/lavf/ffm tests/ref/vsynth1/prores tests/ref/vsynth2/prores Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-03-01 00:13:16 +00:00
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;
}
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;
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) {
lavf: replace AVStream.codec with AVStream.codecpar Currently, AVStream contains an embedded AVCodecContext instance, which is used by demuxers to export stream parameters to the caller and by muxers to receive stream parameters from the caller. It is also used internally as the codec context that is passed to parsers. In addition, it is also widely used by the callers as the decoding (when demuxer) or encoding (when muxing) context, though this has been officially discouraged since Libav 11. There are multiple important problems with this approach: - the fields in AVCodecContext are in general one of * stream parameters * codec options * codec state However, it's not clear which ones are which. It is consequently unclear which fields are a demuxer allowed to set or a muxer allowed to read. This leads to erratic behaviour depending on whether decoding or encoding is being performed or not (and whether it uses the AVStream embedded codec context). - various synchronization issues arising from the fact that the same context is used by several different APIs (muxers/demuxers, parsers, bitstream filters and encoders/decoders) simultaneously, with there being no clear rules for who can modify what and the different processes being typically delayed with respect to each other. - avformat_find_stream_info() making it necessary to support opening and closing a single codec context multiple times, thus complicating the semantics of freeing various allocated objects in the codec context. Those problems are resolved by replacing the AVStream embedded codec context with a newly added AVCodecParameters instance, which stores only the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
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;
}