yading@11: /* yading@11: * RTP iLBC Depacketizer, RFC 3952 yading@11: * Copyright (c) 2012 Martin Storsjo yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: #include "avformat.h" yading@11: #include "rtpdec_formats.h" yading@11: #include "libavutil/avstring.h" yading@11: yading@11: static int ilbc_parse_fmtp(AVStream *stream, PayloadContext *data, yading@11: char *attr, char *value) yading@11: { yading@11: if (!strcmp(attr, "mode")) { yading@11: int mode = atoi(value); yading@11: switch (mode) { yading@11: case 20: yading@11: stream->codec->block_align = 38; yading@11: break; yading@11: case 30: yading@11: stream->codec->block_align = 50; yading@11: break; yading@11: default: yading@11: av_log(NULL, AV_LOG_ERROR, "Unsupported iLBC mode %d\n", mode); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: } yading@11: return 0; yading@11: } yading@11: yading@11: static int ilbc_parse_sdp_line(AVFormatContext *s, int st_index, yading@11: PayloadContext *data, const char *line) yading@11: { yading@11: const char *p; yading@11: AVStream *st; yading@11: yading@11: if (st_index < 0) yading@11: return 0; yading@11: st = s->streams[st_index]; yading@11: yading@11: if (av_strstart(line, "fmtp:", &p)) { yading@11: int ret = ff_parse_fmtp(st, data, p, ilbc_parse_fmtp); yading@11: if (ret < 0) yading@11: return ret; yading@11: if (!st->codec->block_align) { yading@11: av_log(s, AV_LOG_ERROR, "No iLBC mode set\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: } yading@11: return 0; yading@11: } yading@11: yading@11: RTPDynamicProtocolHandler ff_ilbc_dynamic_handler = { yading@11: .enc_name = "iLBC", yading@11: .codec_type = AVMEDIA_TYPE_AUDIO, yading@11: .codec_id = AV_CODEC_ID_ILBC, yading@11: .parse_sdp_a_line = ilbc_parse_sdp_line, yading@11: };