remove APEv1 tag writer

Not used anymore.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavformat/apetagenc.c

-/*
- * APE tag writer
- * Copyright (c) 2012 Paul B Mahol
- *
- * 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/dict.h"
-#include "avio_internal.h"
-#include "avformat.h"
-#include "apetag.h"
-
-static int string_is_ascii(const uint8_t *str)
-{
-    while (*str && *str >= 0x20 && *str <= 0x7e ) str++;
-    return !*str;
-}
-
-void ff_ape_write(AVFormatContext *s)
-{
-    int64_t tag_bytes;
-    AVDictionaryEntry *t = NULL;
-    AVIOContext *pb = s->pb;
-    int tags = 0, vlen;
-
-    tag_bytes = avio_tell(s->pb);
-    while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
-        if (!string_is_ascii(t->key)) {
-            av_log(s, AV_LOG_WARNING, "Non ASCII keys are not allowed\n");
-            continue;
-        }
-
-        vlen = strlen(t->value);
-        avio_wl32(pb, vlen + 1);
-        avio_wl32(pb, 0); // flags
-        avio_put_str(pb, t->key);
-        avio_put_str(pb, t->value);
-        tags++;
-    }
-    tag_bytes = avio_tell(s->pb) - tag_bytes;
-
-    if (!tags)
-        return;
-
-    avio_write(pb, APE_TAG_PREAMBLE, 8);
-    avio_wl32(pb, APE_TAG_VERSION);
-    avio_wl32(pb, tag_bytes + APE_TAG_FOOTER_BYTES);
-    avio_wl32(pb, tags); // item count
-    avio_wl32(pb, 0); // global flags
-    ffio_fill(pb, 0, 8); // reserved
-}