Move metadata API from lavf to lavu.

Rename it to AVDictionary, since it will be used as such.  Tags
documentation and metadata conversion API is lavf-specific, so remains
there.

1 files changed, 20 insertions, 83 deletions

diff --git a/libavformat/metadata.c b/libavformat/metadata.c
index f0275462fe..d8957dfa95 100644
--- a/libavformat/metadata.c
+++ b/libavformat/metadata.c
@@ -21,107 +21,51 @@
 #include <strings.h>
 #include "avformat.h"
 #include "metadata.h"
+#include "libavutil/dict.h"
 
-AVMetadataTag *
-av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
+#if FF_API_OLD_METADATA2
+AVDictionaryEntry *
+av_metadata_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
 {
-    unsigned int i, j;
-
-    if(!m)
-        return NULL;
-
-    if(prev) i= prev - m->elems + 1;
-    else     i= 0;
-
-    for(; i<m->count; i++){
-        const char *s= m->elems[i].key;
-        if(flags & AV_METADATA_MATCH_CASE) for(j=0;         s[j]  ==         key[j]  && key[j]; j++);
-        else                               for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
-        if(key[j])
-            continue;
-        if(s[j] && !(flags & AV_METADATA_IGNORE_SUFFIX))
-            continue;
-        return &m->elems[i];
-    }
-    return NULL;
+    return av_dict_get(m, key, prev, flags);
 }
 
-int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags)
+int av_metadata_set2(AVDictionary **pm, const char *key, const char *value, int flags)
 {
-    AVMetadata *m= *pm;
-    AVMetadataTag *tag= av_metadata_get(m, key, NULL, flags);
-
-    if(!m)
-        m=*pm= av_mallocz(sizeof(*m));
-
-    if(tag){
-        if (flags & AV_METADATA_DONT_OVERWRITE)
-            return 0;
-        av_free(tag->value);
-        av_free(tag->key);
-        *tag= m->elems[--m->count];
-    }else{
-        AVMetadataTag *tmp= av_realloc(m->elems, (m->count+1) * sizeof(*m->elems));
-        if(tmp){
-            m->elems= tmp;
-        }else
-            return AVERROR(ENOMEM);
-    }
-    if(value){
-        if(flags & AV_METADATA_DONT_STRDUP_KEY){
-            m->elems[m->count].key  = key;
-        }else
-        m->elems[m->count].key  = av_strdup(key  );
-        if(flags & AV_METADATA_DONT_STRDUP_VAL){
-            m->elems[m->count].value= value;
-        }else
-        m->elems[m->count].value= av_strdup(value);
-        m->count++;
-    }
-    if(!m->count) {
-        av_free(m->elems);
-        av_freep(pm);
-    }
-
-    return 0;
+    return av_dict_set(pm, key, value, flags);
 }
 
-#if FF_API_OLD_METADATA2
 void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
                                             const AVMetadataConv *s_conv)
 {
     return;
 }
-#endif
 
-void av_metadata_free(AVMetadata **pm)
+void av_metadata_free(AVDictionary **pm)
 {
-    AVMetadata *m= *pm;
+    av_dict_free(pm);
+}
 
-    if(m){
-        while(m->count--){
-            av_free(m->elems[m->count].key);
-            av_free(m->elems[m->count].value);
-        }
-        av_free(m->elems);
-    }
-    av_freep(pm);
+void av_metadata_copy(AVDictionary **dst, AVDictionary *src, int flags)
+{
+    av_dict_copy(dst, src, flags);
 }
+#endif
 
-void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
+void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv,
                                        const AVMetadataConv *s_conv)
 {
     /* TODO: use binary search to look up the two conversion tables
        if the tables are getting big enough that it would matter speed wise */
     const AVMetadataConv *sc, *dc;
-    AVMetadataTag *mtag = NULL;
-    AVMetadata *dst = NULL;
+    AVDictionaryEntry *mtag = NULL;
+    AVDictionary *dst = NULL;
     const char *key;
 
     if (d_conv == s_conv)
         return;
 
-    while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) {
+    while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
         key = mtag->key;
         if (s_conv)
             for (sc=s_conv; sc->native; sc++)
@@ -135,9 +79,9 @@ void ff_metadata_conv(AVMetadata **pm, const AVMetadataConv *d_conv,
                     key = dc->native;
                     break;
                 }
-        av_metadata_set2(&dst, key, mtag->value, 0);
+        av_dict_set(&dst, key, mtag->value, 0);
     }
-    av_metadata_free(pm);
+    av_dict_free(pm);
     *pm = dst;
 }
 
@@ -154,10 +98,3 @@ void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
         ff_metadata_conv(&ctx->programs[i]->metadata, d_conv, s_conv);
 }
 
-void av_metadata_copy(AVMetadata **dst, AVMetadata *src, int flags)
-{
-    AVMetadataTag *t = NULL;
-
-    while ((t = av_metadata_get(src, "", t, AV_METADATA_IGNORE_SUFFIX)))
-        av_metadata_set2(dst, t->key, t->value, flags);
-}