refactor: revert unnecessary changes

libvmaf/include/libvmaf/libvmaf.h

@@ -257,7 +257,6 @@ int vmaf_feature_score_at_index(VmafContext *vmaf, const char *feature_name,
  * Metadata structure.
  *
  * @param feature_name   Name of the feature to fetch.
- *                       vmaf going to take ownership of this string.
  *
  * @param picture_index  Picture index.
  *
@@ -286,31 +285,6 @@ typedef struct VmafMetadataConfiguration {
     void *data;
 } VmafMetadataConfiguration;
 
-
-/**
- * Metadata flags.
- *
- * Features can provide additional metrics about the score. To propagate those,
- * the `VmafMetadataFlags` enum should be used for specifying which information should be
- * propagated to the metadata.
- *
- * @param VMAF_METADATA_FLAG_NONE         No flags.
- *
- * @param VMAF_METADATA_FLAG_FEATURE      Include all indivual metrics.
- *
- * @param VMAF_METADATA_FLAG_MODEL        Propagate only model score.
- *
- * @param VMAF_METADATA_FLAG_FEATURE_NAME Propagate only given feature name..
- *
- */
-
-enum VmafMetadataFlags {
-    VMAF_METADATA_FLAG_NONE = 0,
-    VMAF_METADATA_FLAG_FEATURE = 1 << 0,
-    VMAF_METADATA_FLAG_MODEL = 1 << 1,
-    VMAF_METADATA_FLAG_FEATURE_NAME = 1 << 2,
-};
-
 /**
  * Register a callback to receive VMAF metadata.
  *
@@ -324,19 +298,6 @@ enum VmafMetadataFlags {
 
 int vmaf_register_metadata_handler(VmafContext *vmaf, VmafMetadataConfiguration cfg);
 
-/**
- * Get the number of registered metadata handlers.
- *
- * @param vmaf  The VMAF context allocated with `vmaf_init()`.
- *
- * @param count Number of registered metadata handlers.
- *
- *
- * @return 0 on success, or < 0 (a negative errno code) on error.
- */
-
-int vmaf_get_metadata_handler_count(VmafContext *vmaf, unsigned *count);
-
 /**
  * Pooled VMAF score for a specific interval.
  *

libvmaf/src/feature/feature_collector.c

@@ -296,25 +296,6 @@ int vmaf_feature_collector_register_metadata(VmafFeatureCollector *feature_colle
     return 0;
 }
 
-int vmaf_feature_collector_get_metadata_count(VmafFeatureCollector *feature_collector,
-                                              unsigned *count)
-{
-    if (!feature_collector) return -EINVAL;
-    if (!count) return -EINVAL;
-
-    VmafCallbackList *metadata = feature_collector->metadata;
-    unsigned cnt = 0;
-    VmafCallbackItem *iter = metadata ? metadata->head : NULL;
-    while (iter) {
-        cnt++;
-        iter = iter->next;
-    }
-
-    *count = cnt;
-
-    return 0;
-}
-
 static FeatureVector *find_feature_vector(VmafFeatureCollector *fc,
                                           const char *feature_name)
 {

libvmaf/src/libvmaf.c

@@ -751,14 +751,6 @@ int vmaf_register_metadata_handler(VmafContext *vmaf, VmafMetadataConfiguration
     return vmaf_feature_collector_register_metadata(vmaf->feature_collector, cfg);
 }
 
-int vmaf_get_metadata_handler_count(VmafContext *vmaf, unsigned *count)
-{
-    if (!vmaf) return -EINVAL;
-    if (!count) return -EINVAL;
-
-    return vmaf_feature_collector_get_metadata_count(vmaf->feature_collector, count);
-}
-
 int vmaf_feature_score_at_index(VmafContext *vmaf, const char *feature_name,
                                 double *score, unsigned index)
 {

libvmaf/src/metadata_handler.c

@@ -71,8 +71,6 @@ int vmaf_metadata_destroy(VmafCallbackList *metadata)
     VmafCallbackItem *iter = metadata->head;
     while (iter) {
         VmafCallbackItem *next = iter->next;
-        if (iter->metadata_cfg.feature_name)
-            free(iter->metadata_cfg.feature_name);
         free(iter);
         iter = next;
     }

libvmaf/test/test_predict.c

@@ -107,7 +107,7 @@ static char* test_propagate_metadata()
     };
 
     VmafMetadataConfiguration m = {
-        .feature_name = strdup("vmaf"),
+        .feature_name = "vmaf",
         .callback = set_meta,
         .data     = &meta_data,
     };
@@ -146,7 +146,7 @@ static char* test_propagate_metadata()
     vmaf_feature_collector_destroy(feature_collector);
 
     m.data = NULL;
-    m.feature_name = strdup("vmaf");
+    m.feature_name = "vmaf";
     err = vmaf_feature_collector_init(&feature_collector);
     mu_assert("problem during vmaf_feature_collector_init", !err);
 
@@ -162,7 +162,7 @@ static char* test_propagate_metadata()
     vmaf_feature_collector_destroy(feature_collector);
 
     m.callback = NULL;
-    m.feature_name = strdup("vmaf");
+    m.feature_name = "vmaf";
     err = vmaf_feature_collector_init(&feature_collector);
     mu_assert("problem during vmaf_feature_collector_init", !err);