Factor tag reading code out of wav read_header()

[ffmpeg] / libavformat / metadata.c

diff --git a/libavformat/metadata.c b/libavformat/metadata.c
index 0bfac393b31cefece2239b8f410823f695193a71..7d9a8645df105550f036f5c68269cea8c012c57a 100644 (file)
--- a/libavformat/metadata.c
+++ b/libavformat/metadata.c
@@ -18,10 +18,12 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <strings.h>
+#include "avformat.h"
 #include "metadata.h"
 
 AVMetadataTag *
-av_metadata_get(struct AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
+av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags)
 {
     unsigned int i, j;
 
@@ -33,8 +35,8 @@ av_metadata_get(struct AVMetadata *m, const char *key, const AVMetadataTag *prev
 
     for(; i<m->count; i++){
         const char *s= m->elems[i].key;
-        if(flags & AV_METADATA_IGNORE_CASE) for(j=0; toupper(s[j]) == toupper(key[j]) && key[j]; j++);
-        else                                for(j=0;         s[j]  ==         key[j]  && key[j]; j++);
+        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))
@@ -44,15 +46,17 @@ av_metadata_get(struct AVMetadata *m, const char *key, const AVMetadataTag *prev
     return NULL;
 }
 
-int av_metadata_set(struct AVMetadata **pm, AVMetadataTag elem)
+int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags)
 {
-    struct AVMetadata *m= *pm;
-    AVMetadataTag *tag= av_metadata_get(m, elem.key, NULL, 0);
+    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];
@@ -63,13 +67,102 @@ int av_metadata_set(struct AVMetadata **pm, AVMetadataTag elem)
         }else
             return AVERROR(ENOMEM);
     }
-    if(elem.value){
-        elem.key  = av_strdup(elem.key  );
-        elem.value= av_strdup(elem.value);
-        m->elems[m->count++]= elem;
+    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)
+    if(!m->count) {
+        av_free(m->elems);
         av_freep(pm);
+    }
 
     return 0;
 }
+
+#if FF_API_OLD_METADATA
+int av_metadata_set(AVMetadata **pm, const char *key, const char *value)
+{
+    return av_metadata_set2(pm, key, value, 0);
+}
+
+void av_metadata_conv(AVFormatContext *ctx, const AVMetadataConv *d_conv,
+                                            const AVMetadataConv *s_conv)
+{
+    return;
+}
+#endif
+
+void av_metadata_free(AVMetadata **pm)
+{
+    AVMetadata *m= *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 ff_metadata_conv(AVMetadata **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;
+    const char *key;
+
+    if (d_conv == s_conv)
+        return;
+
+    while((mtag=av_metadata_get(*pm, "", mtag, AV_METADATA_IGNORE_SUFFIX))) {
+        key = mtag->key;
+        if (s_conv)
+            for (sc=s_conv; sc->native; sc++)
+                if (!strcasecmp(key, sc->native)) {
+                    key = sc->generic;
+                    break;
+                }
+        if (d_conv)
+            for (dc=d_conv; dc->native; dc++)
+                if (!strcasecmp(key, dc->generic)) {
+                    key = dc->native;
+                    break;
+                }
+        av_metadata_set2(&dst, key, mtag->value, 0);
+    }
+    av_metadata_free(pm);
+    *pm = dst;
+}
+
+void ff_metadata_conv_ctx(AVFormatContext *ctx, const AVMetadataConv *d_conv,
+                                                const AVMetadataConv *s_conv)
+{
+    int i;
+    ff_metadata_conv(&ctx->metadata, d_conv, s_conv);
+    for (i=0; i<ctx->nb_streams ; i++)
+        ff_metadata_conv(&ctx->streams [i]->metadata, d_conv, s_conv);
+    for (i=0; i<ctx->nb_chapters; i++)
+        ff_metadata_conv(&ctx->chapters[i]->metadata, d_conv, s_conv);
+    for (i=0; i<ctx->nb_programs; i++)
+        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);
+}