summaryrefslogtreecommitdiff
path: root/libavformat/rtp_aac.c
diff options
context:
space:
mode:
authorLuca Abeni <lucabe72@email.it>2007-09-14 08:17:06 +0000
committerLuca Abeni <lucabe72@email.it>2007-09-14 08:17:06 +0000
commit171dce486ce85fbb6a54e24394e1d740395437b0 (patch)
tree56c85d4e9ec26692446297bf5b7b2208764093f9 /libavformat/rtp_aac.c
parentf0dd9d4505675daa0f4fda6fcf4274416a23bf24 (diff)
Support for AAC streaming over RTP. Fragmentation is not implemented yet
Originally committed as revision 10491 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/rtp_aac.c')
-rw-r--r--libavformat/rtp_aac.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/libavformat/rtp_aac.c b/libavformat/rtp_aac.c
new file mode 100644
index 0000000000..267ed932d5
--- /dev/null
+++ b/libavformat/rtp_aac.c
@@ -0,0 +1,72 @@
+/*
+ * copyright (c) 2007 Luca Abeni
+ *
+ * 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 "avformat.h"
+#include "rtp_aac.h"
+#include "rtp_internal.h"
+
+#define MAX_FRAMES_PER_PACKET 5
+#define MAX_AU_HEADERS_SIZE (2 + 2 * MAX_FRAMES_PER_PACKET)
+
+void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
+{
+ RTPDemuxContext *s = s1->priv_data;
+ int len, max_packet_size;
+ uint8_t *p;
+
+ /* skip ADTS header, if present */
+ if ((s1->streams[0]->codec->extradata_size) == 0) {
+ size -= 7;
+ buff += 7;
+ }
+ max_packet_size = s->max_payload_size - MAX_AU_HEADERS_SIZE;
+
+ /* test if the packet must be sent */
+ len = (s->buf_ptr - s->buf);
+ if ((s->read_buf_index == MAX_FRAMES_PER_PACKET) || (len && (len + size) > max_packet_size)) {
+ int au_size = s->read_buf_index * 2;
+
+ p = s->buf + MAX_AU_HEADERS_SIZE - au_size - 2;
+ if (p != s->buf) {
+ memmove(p + 2, s->buf + 2, au_size);
+ }
+ /* Write the AU header size */
+ p[0] = ((au_size * 8) & 0xFF) >> 8;
+ p[1] = (au_size * 8) & 0xFF;
+
+ ff_rtp_send_data(s1, p, s->buf_ptr - p, 1);
+
+ s->read_buf_index = 0;
+ }
+ if (s->read_buf_index == 0) {
+ s->buf_ptr = s->buf + MAX_AU_HEADERS_SIZE;
+ s->timestamp = s->cur_timestamp;
+ }
+
+ if (size < max_packet_size) {
+ p = s->buf + s->read_buf_index++ * 2 + 2;
+ *p++ = size >> 5;
+ *p = (size & 0x1F) << 3;
+ memcpy(s->buf_ptr, buff, size);
+ s->buf_ptr += size;
+ } else {
+ av_log(s1, AV_LOG_ERROR, "Unsupported!\n");
+ }
+}