avformat/utils: move mkdir_p to utils

Because it will be used by avformat/segment.c or other module which
need to automatically create sub-directories operation.
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>

libavformat/hlsenc.c

@@ -230,39 +230,6 @@ typedef struct HLSContext {
     int64_t timeout;
 } HLSContext;
 
-static int mkdir_p(const char *path) {
-    int ret = 0;
-    char *temp = av_strdup(path);
-    char *pos = temp;
-    char tmp_ch = '\0';
-
-    if (!path || !temp) {
-        return -1;
-    }
-
-    if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
-        pos++;
-    } else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
-        pos += 2;
-    }
-
-    for ( ; *pos != '\0'; ++pos) {
-        if (*pos == '/' || *pos == '\\') {
-            tmp_ch = *pos;
-            *pos = '\0';
-            ret = mkdir(temp, 0755);
-            *pos = tmp_ch;
-        }
-    }
-
-    if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
-        ret = mkdir(temp, 0755);
-    }
-
-    av_free(temp);
-    return ret;
-}
-
 static int hlsenc_io_open(AVFormatContext *s, AVIOContext **pb, char *filename,
                           AVDictionary **options) {
     HLSContext *hls = s->priv_data;
@@ -1545,7 +1512,7 @@ static int hls_start(AVFormatContext *s, VariantStream *vs)
                     return AVERROR(ENOMEM);
                 }
                 dir = av_dirname(fn_copy);
-                if (mkdir_p(dir) == -1 && errno != EEXIST) {
+                if (ff_mkdir_p(dir) == -1 && errno != EEXIST) {
                     av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
                     av_free(fn_copy);
                     return AVERROR(errno);
@@ -1776,7 +1743,7 @@ static int format_name(char *buf, int buf_len, int index)
         }
 
         dir = av_dirname(mod_buf_dup);
-        if (mkdir_p(dir) == -1 && errno != EEXIST) {
+        if (ff_mkdir_p(dir) == -1 && errno != EEXIST) {
             ret = AVERROR(errno);
             goto fail;
         }

libavformat/internal.h

@@ -211,6 +211,14 @@ do {\
 
 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
 
+/**
+ * Automatically create sub-directories
+ *
+ * @param path will create sub-directories by path
+ * @return 0, or < 0 on error
+ */
+int ff_mkdir_p(const char *path);
+
 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
 
 /**

libavformat/utils.c

@@ -4797,6 +4797,40 @@ void av_url_split(char *proto, int proto_size,
     }
 }
 
+int ff_mkdir_p(const char *path)
+{
+    int ret = 0;
+    char *temp = av_strdup(path);
+    char *pos = temp;
+    char tmp_ch = '\0';
+
+    if (!path || !temp) {
+        return -1;
+    }
+
+    if (!av_strncasecmp(temp, "/", 1) || !av_strncasecmp(temp, "\\", 1)) {
+        pos++;
+    } else if (!av_strncasecmp(temp, "./", 2) || !av_strncasecmp(temp, ".\\", 2)) {
+        pos += 2;
+    }
+
+    for ( ; *pos != '\0'; ++pos) {
+        if (*pos == '/' || *pos == '\\') {
+            tmp_ch = *pos;
+            *pos = '\0';
+            ret = mkdir(temp, 0755);
+            *pos = tmp_ch;
+        }
+    }
+
+    if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
+        ret = mkdir(temp, 0755);
+    }
+
+    av_free(temp);
+    return ret;
+}
+
 char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase)
 {
     int i;