1 files changed, 110 insertions, 0 deletions
diff --git a/libavformat/playlist.c b/libavformat/playlist.c
new file mode 100644
index 0000000000..db91a7ca73
--- /dev/null
+++ b/libavformat/playlist.c
@@ -0,0 +1,110 @@
+/*
+ * Internal playlist functions.
+ * Copyright (c) 2011 Anton Khirnov
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avformat.h"
+#include "internal.h"
+#include "playlist.h"
+#include "libavutil/mem.h"
+
+AVPlaylistContext *ff_playlist_alloc(void)
+{
+    AVPlaylistContext *p = av_mallocz(sizeof(*p));
+    if (!p)
+        return NULL;
+
+    p->cur_elem = -1;
+
+    return p;
+}
+
+void ff_playlist_free(AVPlaylistContext **pls)
+{
+    AVPlaylistContext *p = *pls;
+
+    if (p) {
+        while (p->nb_elems--) {
+            AVPlaylistElement *e = p->elems[p->nb_elems];
+            while (e->nb_filenames--)
+                av_freep(&e->filenames[e->nb_filenames]);
+            av_freep(&e->filenames);
+            av_freep(&p->elems[p->nb_elems]);
+        }
+        av_freep(pls);
+    }
+}
+
+AVPlaylistElement *ff_playlist_add_entry(AVFormatContext *s, const uint8_t *filename)
+{
+    AVPlaylistElement *elem;
+    uint8_t *tmp;
+
+    if (!s->plist && !(s->plist = ff_playlist_alloc()))
+        return NULL;
+
+    if (!(elem = av_mallocz(sizeof(*elem))))
+        return NULL;
+    tmp = av_strdup(filename);
+    dynarray_add(&elem->filenames, &elem->nb_filenames, tmp);
+    dynarray_add(&s->plist->elems, &s->plist->nb_elems, elem);
+    return elem;
+}
+
+int av_playlist_advance(AVFormatContext *s, int offset, AVDictionary **options)
+{
+    AVPlaylistContext *plist = s->plist;
+    AVPlaylistElement *elem;
+    int ret, i;
+
+    if (!plist)
+        return AVERROR(EINVAL);
+
+    if (plist->cur_elem >= 0) {
+        av_close_input_file(plist->elems[plist->cur_elem]->fc);
+        plist->elems[plist->cur_elem]->fc = NULL;
+        plist->cur_elem += offset;
+    } else
+        plist->cur_elem = (offset >= 0 ? -1 : plist->nb_elems) + offset;
+
+    if (plist->cur_elem >= plist->nb_elems || plist->cur_elem < 0) {
+        plist->cur_elem = -1;
+        return AVERROR_EOF;
+    }
+
+    elem = plist->elems[plist->cur_elem];
+    for (i = 0; i < elem->nb_filenames; i++) {
+        AVDictionary *tmp = NULL;
+
+        if (options && i + 1 < elem->nb_filenames)
+            av_dict_copy(&tmp, *options, 0);        // save the options for the next attempt if needed
+
+        ret = avformat_open_input(&elem->fc, plist->elems[plist->cur_elem]->filenames[i],
+                                  NULL, options);
+        if (ret >= 0) {
+            av_dict_free(&tmp);
+            return plist->cur_elem;
+        }
+        av_dict_free(options);
+        *options = tmp;
+    }
+    av_log(s, AV_LOG_ERROR, "Could not open element %d.\n", plist->cur_elem);
+    plist->cur_elem = -1;
+    return ret;
+}