mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
a75d2a6505
Also don't write empty tags. Signed-off-by: Paul B Mahol <onemda@gmail.com>
242 lines
7.0 KiB
C
242 lines
7.0 KiB
C
/*
|
|
* APE tag handling
|
|
* Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
|
|
* based upon libdemac from Dave Chapman.
|
|
*
|
|
* 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 "libavutil/intreadwrite.h"
|
|
#include "libavutil/dict.h"
|
|
#include "avformat.h"
|
|
#include "avio_internal.h"
|
|
#include "apetag.h"
|
|
#include "internal.h"
|
|
|
|
#define APE_TAG_FLAG_CONTAINS_HEADER (1 << 31)
|
|
#define APE_TAG_FLAG_CONTAINS_FOOTER (1 << 30)
|
|
#define APE_TAG_FLAG_IS_HEADER (1 << 29)
|
|
#define APE_TAG_FLAG_IS_BINARY (1 << 1)
|
|
|
|
static int ape_tag_read_field(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
uint8_t key[1024], *value;
|
|
uint32_t size, flags;
|
|
int i, c;
|
|
|
|
size = avio_rl32(pb); /* field size */
|
|
flags = avio_rl32(pb); /* field flags */
|
|
for (i = 0; i < sizeof(key) - 1; i++) {
|
|
c = avio_r8(pb);
|
|
if (c < 0x20 || c > 0x7E)
|
|
break;
|
|
else
|
|
key[i] = c;
|
|
}
|
|
key[i] = 0;
|
|
if (c != 0) {
|
|
av_log(s, AV_LOG_WARNING, "Invalid APE tag key '%s'.\n", key);
|
|
return -1;
|
|
}
|
|
if (size >= UINT_MAX)
|
|
return -1;
|
|
if (flags & APE_TAG_FLAG_IS_BINARY) {
|
|
uint8_t filename[1024];
|
|
enum AVCodecID id;
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
|
|
size -= avio_get_str(pb, size, filename, sizeof(filename));
|
|
if (size <= 0) {
|
|
av_log(s, AV_LOG_WARNING, "Skipping binary tag '%s'.\n", key);
|
|
return 0;
|
|
}
|
|
|
|
av_dict_set(&st->metadata, key, filename, 0);
|
|
|
|
if ((id = ff_guess_image2_codec(filename)) != AV_CODEC_ID_NONE) {
|
|
AVPacket pkt;
|
|
int ret;
|
|
|
|
ret = av_get_packet(s->pb, &pkt, size);
|
|
if (ret < 0) {
|
|
av_log(s, AV_LOG_ERROR, "Error reading cover art.\n");
|
|
return ret;
|
|
}
|
|
|
|
st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = id;
|
|
|
|
st->attached_pic = pkt;
|
|
st->attached_pic.stream_index = st->index;
|
|
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
|
|
} else {
|
|
st->codec->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!st->codec->extradata)
|
|
return AVERROR(ENOMEM);
|
|
if (avio_read(pb, st->codec->extradata, size) != size) {
|
|
av_freep(&st->codec->extradata);
|
|
return AVERROR(EIO);
|
|
}
|
|
st->codec->extradata_size = size;
|
|
st->codec->codec_type = AVMEDIA_TYPE_ATTACHMENT;
|
|
}
|
|
} else {
|
|
value = av_malloc(size+1);
|
|
if (!value)
|
|
return AVERROR(ENOMEM);
|
|
c = avio_read(pb, value, size);
|
|
if (c < 0) {
|
|
av_free(value);
|
|
return c;
|
|
}
|
|
value[c] = 0;
|
|
av_dict_set(&s->metadata, key, value, AV_DICT_DONT_STRDUP_VAL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int64_t ff_ape_parse_tag(AVFormatContext *s)
|
|
{
|
|
AVIOContext *pb = s->pb;
|
|
int64_t file_size = avio_size(pb);
|
|
uint32_t val, fields, tag_bytes;
|
|
uint8_t buf[8];
|
|
int64_t tag_start;
|
|
int i;
|
|
|
|
if (file_size < APE_TAG_FOOTER_BYTES)
|
|
return 0;
|
|
|
|
avio_seek(pb, file_size - APE_TAG_FOOTER_BYTES, SEEK_SET);
|
|
|
|
avio_read(pb, buf, 8); /* APETAGEX */
|
|
if (strncmp(buf, APE_TAG_PREAMBLE, 8)) {
|
|
return 0;
|
|
}
|
|
|
|
val = avio_rl32(pb); /* APE tag version */
|
|
if (val > APE_TAG_VERSION) {
|
|
av_log(s, AV_LOG_ERROR, "Unsupported tag version. (>=%d)\n", APE_TAG_VERSION);
|
|
return 0;
|
|
}
|
|
|
|
tag_bytes = avio_rl32(pb); /* tag size */
|
|
if (tag_bytes - APE_TAG_FOOTER_BYTES > (1024 * 1024 * 16)) {
|
|
av_log(s, AV_LOG_ERROR, "Tag size is way too big\n");
|
|
return 0;
|
|
}
|
|
|
|
if (tag_bytes > file_size - APE_TAG_FOOTER_BYTES) {
|
|
av_log(s, AV_LOG_ERROR, "Invalid tag size %u.\n", tag_bytes);
|
|
return 0;
|
|
}
|
|
tag_start = file_size - tag_bytes - APE_TAG_FOOTER_BYTES;
|
|
|
|
fields = avio_rl32(pb); /* number of fields */
|
|
if (fields > 65536) {
|
|
av_log(s, AV_LOG_ERROR, "Too many tag fields (%d)\n", fields);
|
|
return 0;
|
|
}
|
|
|
|
val = avio_rl32(pb); /* flags */
|
|
if (val & APE_TAG_FLAG_IS_HEADER) {
|
|
av_log(s, AV_LOG_ERROR, "APE Tag is a header\n");
|
|
return 0;
|
|
}
|
|
|
|
avio_seek(pb, file_size - tag_bytes, SEEK_SET);
|
|
|
|
for (i=0; i<fields; i++)
|
|
if (ape_tag_read_field(s) < 0) break;
|
|
|
|
return tag_start;
|
|
}
|
|
|
|
static int string_is_ascii(const uint8_t *str)
|
|
{
|
|
while (*str && *str >= 0x20 && *str <= 0x7e ) str++;
|
|
return !*str;
|
|
}
|
|
|
|
int ff_ape_write_tag(AVFormatContext *s)
|
|
{
|
|
AVDictionaryEntry *e = NULL;
|
|
int size, ret, count = 0;
|
|
AVIOContext *dyn_bc = NULL;
|
|
uint8_t *dyn_buf = NULL;
|
|
|
|
if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
|
|
goto end;
|
|
|
|
// flags
|
|
avio_wl32(dyn_bc, APE_TAG_FLAG_CONTAINS_HEADER | APE_TAG_FLAG_CONTAINS_FOOTER |
|
|
APE_TAG_FLAG_IS_HEADER);
|
|
ffio_fill(dyn_bc, 0, 8); // reserved
|
|
|
|
while ((e = av_dict_get(s->metadata, "", e, AV_DICT_IGNORE_SUFFIX))) {
|
|
int val_len;
|
|
|
|
if (!string_is_ascii(e->key)) {
|
|
av_log(s, AV_LOG_WARNING, "Non ASCII keys are not allowed\n");
|
|
continue;
|
|
}
|
|
|
|
val_len = strlen(e->value);
|
|
avio_wl32(dyn_bc, val_len); // value length
|
|
avio_wl32(dyn_bc, 0); // item flags
|
|
avio_put_str(dyn_bc, e->key); // key
|
|
avio_write(dyn_bc, e->value, val_len); // value
|
|
count++;
|
|
}
|
|
if (!count)
|
|
goto end;
|
|
|
|
size = avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
if (size <= 0)
|
|
goto end;
|
|
size += 20;
|
|
|
|
// header
|
|
avio_write(s->pb, "APETAGEX", 8); // id
|
|
avio_wl32(s->pb, APE_TAG_VERSION); // version
|
|
avio_wl32(s->pb, size);
|
|
avio_wl32(s->pb, count);
|
|
|
|
avio_write(s->pb, dyn_buf, size - 20);
|
|
|
|
// footer
|
|
avio_write(s->pb, "APETAGEX", 8); // id
|
|
avio_wl32(s->pb, APE_TAG_VERSION); // version
|
|
avio_wl32(s->pb, size); // size
|
|
avio_wl32(s->pb, count); // tag count
|
|
|
|
// flags
|
|
avio_wl32(s->pb, APE_TAG_FLAG_CONTAINS_HEADER | APE_TAG_FLAG_CONTAINS_FOOTER);
|
|
ffio_fill(s->pb, 0, 8); // reserved
|
|
|
|
end:
|
|
if (dyn_bc && !dyn_buf)
|
|
avio_close_dyn_buf(dyn_bc, &dyn_buf);
|
|
av_freep(&dyn_buf);
|
|
|
|
return ret;
|
|
}
|