avformat/utils: Move ff_add_attached_pic to demux_utils.c

It is demuxer-only: It potentially adds an AVStream and it sets
AVStream.attached_pic.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 36 insertions, 0 deletions

diff --git a/libavformat/demux_utils.c b/libavformat/demux_utils.c
index ca5750d1ef..1fd634d1a2 100644
--- a/libavformat/demux_utils.c
+++ b/libavformat/demux_utils.c
@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/avassert.h"
 #include "libavcodec/packet_internal.h"
 #include "avformat.h"
 #include "demux.h"
@@ -107,3 +108,38 @@ int avformat_queue_attached_pictures(AVFormatContext *s)
         }
     return 0;
 }
+
+int ff_add_attached_pic(AVFormatContext *s, AVStream *st0, AVIOContext *pb,
+                        AVBufferRef **buf, int size)
+{
+    AVStream *st = st0;
+    AVPacket *pkt;
+    int ret;
+
+    if (!st && !(st = avformat_new_stream(s, NULL)))
+        return AVERROR(ENOMEM);
+    pkt = &st->attached_pic;
+    if (buf) {
+        av_assert1(*buf);
+        av_packet_unref(pkt);
+        pkt->buf  = *buf;
+        pkt->data = (*buf)->data;
+        pkt->size = (*buf)->size - AV_INPUT_BUFFER_PADDING_SIZE;
+        *buf = NULL;
+    } else {
+        ret = av_get_packet(pb, pkt, size);
+        if (ret < 0)
+            goto fail;
+    }
+    st->disposition         |= AV_DISPOSITION_ATTACHED_PIC;
+    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+
+    pkt->stream_index = st->index;
+    pkt->flags       |= AV_PKT_FLAG_KEY;
+
+    return 0;
+fail:
+    if (!st0)
+        ff_remove_stream(s, st);
+    return ret;
+}