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author | Luca Abeni <lucabe72@email.it> | 2007-09-14 08:17:06 +0000 |
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committer | Luca Abeni <lucabe72@email.it> | 2007-09-14 08:17:06 +0000 |
commit | 171dce486ce85fbb6a54e24394e1d740395437b0 (patch) | |
tree | 56c85d4e9ec26692446297bf5b7b2208764093f9 /libavformat/rtp_aac.c | |
parent | f0dd9d4505675daa0f4fda6fcf4274416a23bf24 (diff) | |
download | ffmpeg-streaming-171dce486ce85fbb6a54e24394e1d740395437b0.zip ffmpeg-streaming-171dce486ce85fbb6a54e24394e1d740395437b0.tar.gz |
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.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/libavformat/rtp_aac.c b/libavformat/rtp_aac.c new file mode 100644 index 0000000..267ed93 --- /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"); + } +} |