| /* $Id$ */ |
| /* |
| * Copyright (C) 2011 Teluu Inc. (http://www.teluu.com) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjmedia/stream_common.h> |
| #include <pj/log.h> |
| |
| #define THIS_FILE "stream_common.c" |
| |
| /* |
| * Parse fmtp for specified format/payload type. |
| */ |
| PJ_DEF(pj_status_t) pjmedia_stream_info_parse_fmtp( pj_pool_t *pool, |
| const pjmedia_sdp_media *m, |
| unsigned pt, |
| pjmedia_codec_fmtp *fmtp) |
| { |
| const pjmedia_sdp_attr *attr; |
| pjmedia_sdp_fmtp sdp_fmtp; |
| char *p, *p_end, fmt_buf[8]; |
| pj_str_t fmt; |
| pj_status_t status; |
| |
| pj_assert(m && fmtp); |
| |
| pj_bzero(fmtp, sizeof(pjmedia_codec_fmtp)); |
| |
| /* Get "fmtp" attribute for the format */ |
| pj_ansi_sprintf(fmt_buf, "%d", pt); |
| fmt = pj_str(fmt_buf); |
| attr = pjmedia_sdp_media_find_attr2(m, "fmtp", &fmt); |
| if (attr == NULL) |
| return PJ_SUCCESS; |
| |
| /* Parse "fmtp" attribute */ |
| status = pjmedia_sdp_attr_get_fmtp(attr, &sdp_fmtp); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| /* Prepare parsing */ |
| p = sdp_fmtp.fmt_param.ptr; |
| p_end = p + sdp_fmtp.fmt_param.slen; |
| |
| /* Parse */ |
| while (p < p_end) { |
| char *token, *start, *end; |
| |
| if (fmtp->cnt >= PJMEDIA_CODEC_MAX_FMTP_CNT) { |
| PJ_LOG(4,(THIS_FILE, |
| "Warning: fmtp parameter count exceeds " |
| "PJMEDIA_CODEC_MAX_FMTP_CNT")); |
| return PJ_SUCCESS; |
| } |
| |
| /* Skip whitespaces */ |
| while (p < p_end && (*p == ' ' || *p == '\t')) ++p; |
| if (p == p_end) |
| break; |
| |
| /* Get token */ |
| start = p; |
| while (p < p_end && *p != ';' && *p != '=') ++p; |
| end = p - 1; |
| |
| /* Right trim */ |
| while (end >= start && (*end == ' ' || *end == '\t' || |
| *end == '\r' || *end == '\n' )) |
| --end; |
| |
| /* Forward a char after trimming */ |
| ++end; |
| |
| /* Store token */ |
| if (end > start) { |
| if (pool) { |
| token = (char*)pj_pool_alloc(pool, end - start); |
| pj_ansi_strncpy(token, start, end - start); |
| } else { |
| token = start; |
| } |
| if (*p == '=') |
| /* Got param name */ |
| pj_strset(&fmtp->param[fmtp->cnt].name, token, end - start); |
| else |
| /* Got param value */ |
| pj_strset(&fmtp->param[fmtp->cnt++].val, token, end - start); |
| } else if (*p != '=') { |
| ++fmtp->cnt; |
| } |
| |
| /* Next */ |
| ++p; |
| } |
| |
| return PJ_SUCCESS; |
| } |
| |