Move av_packet_*() functions from libavformat/ to libavcodec/, where the

AVPacket structure now resides also.

Patch by Thilo Borgmann thilo.borgmann googlemail com, see the mailinglist
thread "Google Summer of Code participation" for additional discussion.

Originally committed as revision 18353 to svn://svn.ffmpeg.org/ffmpeg/trunk

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;
+}