From 16ad77b357ebbe74a7bc9568904c328a2722651e Mon Sep 17 00:00:00 2001
From: Michael Karcher <ffmpeg@mkarcher.dialup.fu-berlin.de>
Date: Fri, 21 Oct 2011 23:32:32 +0200
Subject: Move id3v2 tag writing to a separate file.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
---
 libavformat/mp3enc.c | 116 ++-------------------------------------------------
 1 file changed, 4 insertions(+), 112 deletions(-)

(limited to 'libavformat/mp3enc.c')

diff --git a/libavformat/mp3enc.c b/libavformat/mp3enc.c
index 64f8957a4c..e3c0987b6e 100644
--- a/libavformat/mp3enc.c
+++ b/libavformat/mp3enc.c
@@ -74,64 +74,6 @@ static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
     return count;
 }
 
-/* simple formats */
-
-static void id3v2_put_size(AVFormatContext *s, int size)
-{
-    avio_w8(s->pb, size >> 21 & 0x7f);
-    avio_w8(s->pb, size >> 14 & 0x7f);
-    avio_w8(s->pb, size >> 7  & 0x7f);
-    avio_w8(s->pb, size       & 0x7f);
-}
-
-static int string_is_ascii(const uint8_t *str)
-{
-    while (*str && *str < 128) str++;
-    return !*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(AVFormatContext *s, const char *str1, const char *str2,
-                          uint32_t tag, enum ID3v2Encoding enc)
-{
-    int len;
-    uint8_t *pb;
-    int (*put)(AVIOContext*, const char*);
-    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);
-    if (enc == ID3v2_ENCODING_UTF16BOM) {
-        avio_wl16(dyn_buf, 0xFEFF);      /* BOM */
-        put = avio_put_str16le;
-    } else
-        put = avio_put_str;
-
-    put(dyn_buf, str1);
-    if (str2)
-        put(dyn_buf, str2);
-    len = avio_close_dyn_buf(dyn_buf, &pb);
-
-    avio_wb32(s->pb, tag);
-    id3v2_put_size(s, len);
-    avio_wb16(s->pb, 0);
-    avio_write(s->pb, pb, len);
-
-    av_freep(&pb);
-    return len + ID3v2_HEADER_SIZE;
-}
-
 typedef struct MP3Context {
     const AVClass *class;
     int id3v2_version;
@@ -191,21 +133,6 @@ static const AVClass mp3_muxer_class = {
     .version        = LIBAVUTIL_VERSION_INT,
 };
 
-static int id3v2_check_write_tag(AVFormatContext *s, 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(s, t->value, NULL, tag, enc);
-    return -1;
-}
-
 /* insert a dummy frame containing number of frames */
 static void mp3_write_xing(AVFormatContext *s)
 {
@@ -259,46 +186,11 @@ static void mp3_write_xing(AVFormatContext *s)
 static int mp3_write_header(struct AVFormatContext *s)
 {
     MP3Context  *mp3 = s->priv_data;
-    AVDictionaryEntry *t = NULL;
-    int totlen = 0, enc = mp3->id3v2_version == 3 ? ID3v2_ENCODING_UTF16BOM :
-                                                    ID3v2_ENCODING_UTF8;
-    int64_t size_pos, cur_pos;
-
-    avio_wb32(s->pb, MKBETAG('I', 'D', '3', mp3->id3v2_version));
-    avio_w8(s->pb, 0);
-    avio_w8(s->pb, 0); /* flags */
-
-    /* reserve space for size */
-    size_pos = avio_tell(s->pb);
-    avio_wb32(s->pb, 0);
-
-    ff_metadata_conv(&s->metadata, ff_id3v2_34_metadata_conv, NULL);
-    if (mp3->id3v2_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(s, t, ff_id3v2_tags, enc)) > 0) {
-            totlen += ret;
-            continue;
-        }
-        if ((ret = id3v2_check_write_tag(s, t, mp3->id3v2_version == 3 ?
-                                               ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
-            totlen += ret;
-            continue;
-        }
-
-        /* unknown tag, write as TXXX frame */
-        if ((ret = id3v2_put_ttag(s, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
-            return ret;
-        totlen += ret;
-    }
+    int ret;
 
-    cur_pos = avio_tell(s->pb);
-    avio_seek(s->pb, size_pos, SEEK_SET);
-    id3v2_put_size(s, totlen);
-    avio_seek(s->pb, cur_pos, SEEK_SET);
+    ret = ff_id3v2_write(s, mp3->id3v2_version, ID3v2_DEFAULT_MAGIC);
+    if (ret < 0)
+        return ret;
 
     if (s->pb->seekable)
         mp3_write_xing(s);
-- 
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