0,0 → 1,74 |
/* |
* RTP iLBC Depacketizer, RFC 3952 |
* Copyright (c) 2012 Martin Storsjo |
* |
* 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 "rtpdec_formats.h" |
#include "libavutil/avstring.h" |
|
static int ilbc_parse_fmtp(AVFormatContext *s, |
AVStream *stream, PayloadContext *data, |
const char *attr, const char *value) |
{ |
if (!strcmp(attr, "mode")) { |
int mode = atoi(value); |
switch (mode) { |
case 20: |
stream->codec->block_align = 38; |
break; |
case 30: |
stream->codec->block_align = 50; |
break; |
default: |
av_log(s, AV_LOG_ERROR, "Unsupported iLBC mode %d\n", mode); |
return AVERROR(EINVAL); |
} |
} |
return 0; |
} |
|
static int ilbc_parse_sdp_line(AVFormatContext *s, int st_index, |
PayloadContext *data, const char *line) |
{ |
const char *p; |
AVStream *st; |
|
if (st_index < 0) |
return 0; |
st = s->streams[st_index]; |
|
if (av_strstart(line, "fmtp:", &p)) { |
int ret = ff_parse_fmtp(s, st, data, p, ilbc_parse_fmtp); |
if (ret < 0) |
return ret; |
if (!st->codec->block_align) { |
av_log(s, AV_LOG_ERROR, "No iLBC mode set\n"); |
return AVERROR(EINVAL); |
} |
} |
return 0; |
} |
|
RTPDynamicProtocolHandler ff_ilbc_dynamic_handler = { |
.enc_name = "iLBC", |
.codec_type = AVMEDIA_TYPE_AUDIO, |
.codec_id = AV_CODEC_ID_ILBC, |
.parse_sdp_a_line = ilbc_parse_sdp_line, |
}; |