* Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
* based upon libdemac from Dave Chapman.
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "apetag.h"
#include "internal.h"
-#define APE_TAG_VERSION 2000
-#define APE_TAG_FOOTER_BYTES 32
#define APE_TAG_FLAG_CONTAINS_HEADER (1 << 31)
#define APE_TAG_FLAG_IS_HEADER (1 << 29)
#define APE_TAG_FLAG_IS_BINARY (1 << 1)
return -1;
if (flags & APE_TAG_FLAG_IS_BINARY) {
uint8_t filename[1024];
- enum CodecID id;
+ enum AVCodecID id;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
av_dict_set(&st->metadata, key, filename, 0);
- if ((id = ff_guess_image2_codec(filename)) != CODEC_ID_NONE) {
+ if ((id = ff_guess_image2_codec(filename)) != AV_CODEC_ID_NONE) {
AVPacket pkt;
int ret;
return 0;
}
-void ff_ape_parse_tag(AVFormatContext *s)
+int64_t ff_ape_parse_tag(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int 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;
+ return 0;
avio_seek(pb, file_size - APE_TAG_FOOTER_BYTES, SEEK_SET);
avio_read(pb, buf, 8); /* APETAGEX */
- if (strncmp(buf, "APETAGEX", 8)) {
- return;
+ 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;
+ 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;
+ return 0;
+ }
+
+ tag_start = file_size - tag_bytes - APE_TAG_FOOTER_BYTES;
+ if (tag_start < 0) {
+ av_log(s, AV_LOG_ERROR, "Invalid tag size %u.\n", tag_bytes);
+ return 0;
}
fields = avio_rl32(pb); /* number of fields */
if (fields > 65536) {
av_log(s, AV_LOG_ERROR, "Too many tag fields (%d)\n", fields);
- return;
+ 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;
+ 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;
}