Rename the RTP muxer sources so that the packetisation functions are in

rtpenc_*.c files.

Originally committed as revision 21284 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 85 insertions, 0 deletions

diff --git a/libavformat/rtpenc_aac.c b/libavformat/rtpenc_aac.c
new file mode 100644
index 0000000000..e19b28697e
--- /dev/null
+++ b/libavformat/rtpenc_aac.c
@@ -0,0 +1,85 @@
+/*
+ * 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 "rtpenc.h"
+
+
+void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size)
+{
+    RTPMuxContext *s = s1->priv_data;
+    int len, max_packet_size;
+    uint8_t *p;
+    const int max_frames_per_packet = s->max_frames_per_packet ? s->max_frames_per_packet : 5;
+    const int max_au_headers_size = 2 + 2 * max_frames_per_packet;
+
+    /* 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->num_frames == max_frames_per_packet) || (len && (len + size) > s->max_payload_size)) {
+        int au_size = s->num_frames * 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->num_frames = 0;
+    }
+    if (s->num_frames == 0) {
+        s->buf_ptr = s->buf + max_au_headers_size;
+        s->timestamp = s->cur_timestamp;
+    }
+
+    if (size <= max_packet_size) {
+        p = s->buf + s->num_frames++ * 2 + 2;
+        *p++ = size >> 5;
+        *p = (size & 0x1F) << 3;
+        memcpy(s->buf_ptr, buff, size);
+        s->buf_ptr += size;
+    } else {
+        int au_size = size;
+
+        max_packet_size = s->max_payload_size - 4;
+        p = s->buf;
+        p[0] = 0;
+        p[1] = 16;
+        while (size > 0) {
+            len = FFMIN(size, max_packet_size);
+            p[2] = au_size >> 5;
+            p[3] = (au_size & 0x1F) << 3;
+            memcpy(p + 4, buff, len);
+            ff_rtp_send_data(s1, p, len + 4, len == size);
+            size -= len;
+            buff += len;
+        }
+    }
+}