1 files changed, 82 insertions, 0 deletions
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
new file mode 100644
index 0000000000..107afb3817
--- /dev/null
+++ b/libavcodec/avpacket.c
@@ -0,0 +1,82 @@
+/*
+ * AVPacket functions for libavcodec
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avcodec.h"
+
+
+void av_destruct_packet_nofree(AVPacket *pkt)
+{
+    pkt->data = NULL; pkt->size = 0;
+}
+
+void av_destruct_packet(AVPacket *pkt)
+{
+    av_free(pkt->data);
+    pkt->data = NULL; pkt->size = 0;
+}
+
+void av_init_packet(AVPacket *pkt)
+{
+    pkt->pts   = AV_NOPTS_VALUE;
+    pkt->dts   = AV_NOPTS_VALUE;
+    pkt->pos   = -1;
+    pkt->duration = 0;
+    pkt->convergence_duration = 0;
+    pkt->flags = 0;
+    pkt->stream_index = 0;
+    pkt->destruct= av_destruct_packet_nofree;
+}
+
+int av_new_packet(AVPacket *pkt, int size)
+{
+    uint8_t *data;
+    if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(ENOMEM);
+    data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
+    if (!data)
+        return AVERROR(ENOMEM);
+    memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+    av_init_packet(pkt);
+    pkt->data = data;
+    pkt->size = size;
+    pkt->destruct = av_destruct_packet;
+    return 0;
+}
+
+int av_dup_packet(AVPacket *pkt)
+{
+    if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) {
+        uint8_t *data;
+        /* We duplicate the packet and don't forget to add the padding again. */
+        if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE)
+            return AVERROR(ENOMEM);
+        data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+        if (!data) {
+            return AVERROR(ENOMEM);
+        }
+        memcpy(data, pkt->data, pkt->size);
+        memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+        pkt->data = data;
+        pkt->destruct = av_destruct_packet;
+    }
+    return 0;
+}