| Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia-codec/g7221_sdp_match.h> |
| 21 | #include <pjmedia/errno.h> |
| 22 | #include <pj/pool.h> |
| 23 | #include <pj/string.h> |
| 24 | |
| 25 | |
| 26 | #define GET_FMTP_IVAL_BASE(ival, base, fmtp, param, default_val) \ |
| 27 | do { \ |
| 28 | pj_str_t s; \ |
| 29 | char *p; \ |
| 30 | p = pj_stristr(&fmtp.fmt_param, ¶m); \ |
| 31 | if (!p) { \ |
| 32 | ival = default_val; \ |
| 33 | break; \ |
| 34 | } \ |
| 35 | pj_strset(&s, p + param.slen, fmtp.fmt_param.slen - \ |
| 36 | (p - fmtp.fmt_param.ptr) - param.slen); \ |
| 37 | ival = pj_strtoul2(&s, NULL, base); \ |
| 38 | } while (0) |
| 39 | |
| 40 | #define GET_FMTP_IVAL(ival, fmtp, param, default_val) \ |
| 41 | GET_FMTP_IVAL_BASE(ival, 10, fmtp, param, default_val) |
| 42 | |
| 43 | |
| 44 | |
| 45 | PJ_DEF(pj_status_t) pjmedia_codec_g7221_match_sdp(pj_pool_t *pool, |
| 46 | pjmedia_sdp_media *offer, |
| 47 | unsigned o_fmt_idx, |
| 48 | pjmedia_sdp_media *answer, |
| 49 | unsigned a_fmt_idx, |
| 50 | unsigned option) |
| 51 | { |
| 52 | const pjmedia_sdp_attr *attr_ans; |
| 53 | const pjmedia_sdp_attr *attr_ofr; |
| 54 | pjmedia_sdp_fmtp fmtp; |
| 55 | unsigned a_bitrate, o_bitrate; |
| 56 | const pj_str_t bitrate = {"bitrate=", 8}; |
| 57 | pj_status_t status; |
| 58 | |
| 59 | PJ_UNUSED_ARG(pool); |
| 60 | PJ_UNUSED_ARG(option); |
| 61 | |
| 62 | /* Parse offer */ |
| 63 | attr_ofr = pjmedia_sdp_media_find_attr2(offer, "fmtp", |
| 64 | &offer->desc.fmt[o_fmt_idx]); |
| 65 | if (!attr_ofr) |
| 66 | return PJMEDIA_SDP_EINFMTP; |
| 67 | |
| 68 | status = pjmedia_sdp_attr_get_fmtp(attr_ofr, &fmtp); |
| 69 | if (status != PJ_SUCCESS) |
| 70 | return status; |
| 71 | |
| 72 | GET_FMTP_IVAL(o_bitrate, fmtp, bitrate, 0); |
| 73 | |
| 74 | /* Parse answer */ |
| 75 | attr_ans = pjmedia_sdp_media_find_attr2(answer, "fmtp", |
| 76 | &answer->desc.fmt[a_fmt_idx]); |
| 77 | if (!attr_ans) |
| 78 | return PJMEDIA_SDP_EINFMTP; |
| 79 | |
| 80 | status = pjmedia_sdp_attr_get_fmtp(attr_ans, &fmtp); |
| 81 | if (status != PJ_SUCCESS) |
| 82 | return status; |
| 83 | |
| 84 | GET_FMTP_IVAL(a_bitrate, fmtp, bitrate, 0); |
| 85 | |
| 86 | /* Compare bitrate in answer and offer. */ |
| 87 | if (a_bitrate != o_bitrate) |
| 88 | return PJMEDIA_SDP_EFORMATNOTEQUAL; |
| 89 | |
| 90 | return PJ_SUCCESS; |
| 91 | } |