/* $Id$ */ /* * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* memcpy() */ #if defined(PJMEDIA_HAS_VIDEO) && (PJMEDIA_HAS_VIDEO != 0) #define THIS_FILE "vid_stream.c" #define ERRLEVEL 1 #define LOGERR_(expr) stream_perror expr #define TRC_(expr) PJ_LOG(5,expr) #define SIGNATURE PJMEDIA_SIG_PORT_VID_STREAM /* Tracing jitter buffer operations in a stream session to a CSV file. * The trace will contain JB operation timestamp, frame info, RTP info, and * the JB state right after the operation. */ #define TRACE_JB 0 /* Enable/disable trace. */ #define TRACE_JB_PATH_PREFIX "" /* Optional path/prefix for the CSV filename. */ #if TRACE_JB # include # define TRACE_JB_INVALID_FD ((pj_oshandle_t)-1) # define TRACE_JB_OPENED(s) (s->trace_jb_fd != TRACE_JB_INVALID_FD) #endif #ifndef PJMEDIA_VSTREAM_SIZE # define PJMEDIA_VSTREAM_SIZE 1000 #endif #ifndef PJMEDIA_VSTREAM_INC # define PJMEDIA_VSTREAM_INC 1000 #endif /** * Media channel. */ typedef struct pjmedia_vid_channel { pjmedia_vid_stream *stream; /**< Parent stream. */ pjmedia_dir dir; /**< Channel direction. */ pjmedia_port port; /**< Port interface. */ unsigned pt; /**< Payload type. */ pj_bool_t paused; /**< Paused?. */ void *buf; /**< Output buffer. */ unsigned buf_size; /**< Size of output buffer. */ unsigned buf_len; /**< Length of data in buffer. */ pjmedia_rtp_session rtp; /**< RTP session. */ } pjmedia_vid_channel; /** * This structure describes media stream. * A media stream is bidirectional media transmission between two endpoints. * It consists of two channels, i.e. encoding and decoding channels. * A media stream corresponds to a single "m=" line in a SDP session * description. */ struct pjmedia_vid_stream { pj_pool_t *own_pool; /**< Internal pool. */ pjmedia_endpt *endpt; /**< Media endpoint. */ pjmedia_vid_codec_mgr *codec_mgr; /**< Codec manager. */ pjmedia_vid_stream_info info; /**< Stream info. */ pjmedia_vid_channel *enc; /**< Encoding channel. */ pjmedia_vid_channel *dec; /**< Decoding channel. */ pjmedia_dir dir; /**< Stream direction. */ void *user_data; /**< User data. */ pj_str_t name; /**< Stream name */ pj_str_t cname; /**< SDES CNAME */ pjmedia_transport *transport; /**< Stream transport. */ unsigned send_err_cnt; /**< Send error count. */ pj_mutex_t *jb_mutex; pjmedia_jbuf *jb; /**< Jitter buffer. */ char jb_last_frm; /**< Last frame type from jb */ unsigned jb_last_frm_cnt;/**< Last JB frame type counter*/ pjmedia_rtcp_session rtcp; /**< RTCP for incoming RTP. */ pj_uint32_t rtcp_last_tx; /**< RTCP tx time in timestamp */ pj_uint32_t rtcp_interval; /**< Interval, in timestamp. */ pj_bool_t initial_rr; /**< Initial RTCP RR sent */ unsigned frame_size; /**< Size of encoded base frame.*/ unsigned frame_ts_len; /**< Frame length in timestamp. */ unsigned rx_frame_cnt; /**< # of array in rx_frames */ pjmedia_frame *rx_frames; /**< Temp. buffer for incoming frame assembly. */ #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA!=0 pj_bool_t use_ka; /**< Stream keep-alive with non- codec-VAD mechanism is enabled? */ pj_timestamp last_frm_ts_sent; /**< Timestamp of last sending packet */ #endif #if TRACE_JB pj_oshandle_t trace_jb_fd; /**< Jitter tracing file handle.*/ char *trace_jb_buf; /**< Jitter tracing buffer. */ #endif pjmedia_vid_codec *codec; /**< Codec instance being used. */ pj_uint32_t last_dec_ts; /**< Last decoded timestamp. */ int last_dec_seq; /**< Last decoded sequence. */ pjmedia_event_subscription esub_codec; /**< To subscribe codec events */ pjmedia_event_publisher epub; /**< To publish events */ }; /* * Print error. */ static void stream_perror(const char *sender, const char *title, pj_status_t status) { char errmsg[PJ_ERR_MSG_SIZE]; pj_strerror(status, errmsg, sizeof(errmsg)); PJ_LOG(4,(sender, "%s: %s [err:%d]", title, errmsg, status)); } #if TRACE_JB PJ_INLINE(int) trace_jb_print_timestamp(char **buf, pj_ssize_t len) { pj_time_val now; pj_parsed_time ptime; char *p = *buf; if (len < 14) return -1; pj_gettimeofday(&now); pj_time_decode(&now, &ptime); p += pj_utoa_pad(ptime.hour, p, 2, '0'); *p++ = ':'; p += pj_utoa_pad(ptime.min, p, 2, '0'); *p++ = ':'; p += pj_utoa_pad(ptime.sec, p, 2, '0'); *p++ = '.'; p += pj_utoa_pad(ptime.msec, p, 3, '0'); *p++ = ','; *buf = p; return 0; } PJ_INLINE(int) trace_jb_print_state(pjmedia_vid_stream *stream, char **buf, pj_ssize_t len) { char *p = *buf; char *endp = *buf + len; pjmedia_jb_state state; pjmedia_jbuf_get_state(stream->jb, &state); len = pj_ansi_snprintf(p, endp-p, "%d, %d, %d", state.size, state.burst, state.prefetch); if ((len < 0) || (len >= endp-p)) return -1; p += len; *buf = p; return 0; } static void trace_jb_get(pjmedia_vid_stream *stream, pjmedia_jb_frame_type ft, pj_size_t fsize) { char *p = stream->trace_jb_buf; char *endp = stream->trace_jb_buf + PJ_LOG_MAX_SIZE; pj_ssize_t len = 0; const char* ft_st; if (!TRACE_JB_OPENED(stream)) return; /* Print timestamp. */ if (trace_jb_print_timestamp(&p, endp-p)) goto on_insuff_buffer; /* Print frame type and size */ switch(ft) { case PJMEDIA_JB_MISSING_FRAME: ft_st = "missing"; break; case PJMEDIA_JB_NORMAL_FRAME: ft_st = "normal"; break; case PJMEDIA_JB_ZERO_PREFETCH_FRAME: ft_st = "prefetch"; break; case PJMEDIA_JB_ZERO_EMPTY_FRAME: ft_st = "empty"; break; default: ft_st = "unknown"; break; } /* Print operation, size, frame count, frame type */ len = pj_ansi_snprintf(p, endp-p, "GET,%d,1,%s,,,,", fsize, ft_st); if ((len < 0) || (len >= endp-p)) goto on_insuff_buffer; p += len; /* Print JB state */ if (trace_jb_print_state(stream, &p, endp-p)) goto on_insuff_buffer; /* Print end of line */ if (endp-p < 2) goto on_insuff_buffer; *p++ = '\n'; /* Write and flush */ len = p - stream->trace_jb_buf; pj_file_write(stream->trace_jb_fd, stream->trace_jb_buf, &len); pj_file_flush(stream->trace_jb_fd); return; on_insuff_buffer: pj_assert(!"Trace buffer too small, check PJ_LOG_MAX_SIZE!"); } static void trace_jb_put(pjmedia_vid_stream *stream, const pjmedia_rtp_hdr *hdr, unsigned payloadlen, unsigned frame_cnt) { char *p = stream->trace_jb_buf; char *endp = stream->trace_jb_buf + PJ_LOG_MAX_SIZE; pj_ssize_t len = 0; if (!TRACE_JB_OPENED(stream)) return; /* Print timestamp. */ if (trace_jb_print_timestamp(&p, endp-p)) goto on_insuff_buffer; /* Print operation, size, frame count, RTP info */ len = pj_ansi_snprintf(p, endp-p, "PUT,%d,%d,,%d,%d,%d,", payloadlen, frame_cnt, pj_ntohs(hdr->seq), pj_ntohl(hdr->ts), hdr->m); if ((len < 0) || (len >= endp-p)) goto on_insuff_buffer; p += len; /* Print JB state */ if (trace_jb_print_state(stream, &p, endp-p)) goto on_insuff_buffer; /* Print end of line */ if (endp-p < 2) goto on_insuff_buffer; *p++ = '\n'; /* Write and flush */ len = p - stream->trace_jb_buf; pj_file_write(stream->trace_jb_fd, stream->trace_jb_buf, &len); pj_file_flush(stream->trace_jb_fd); return; on_insuff_buffer: pj_assert(!"Trace buffer too small, check PJ_LOG_MAX_SIZE!"); } #endif /* TRACE_JB */ static void dump_port_info(const pjmedia_vid_channel *chan, const char *event_name) { const pjmedia_port_info *pi = &chan->port.info; char fourcc_name[5]; PJ_LOG(5, (pi->name.ptr, " %s format %s: %dx%d %s%s %d/%d(~%d)fps", (chan->dir==PJMEDIA_DIR_DECODING? "Decoding":"Encoding"), event_name, pi->fmt.det.vid.size.w, pi->fmt.det.vid.size.h, pjmedia_fourcc_name(pi->fmt.id, fourcc_name), (chan->dir==PJMEDIA_DIR_ENCODING?"->":"<-"), pi->fmt.det.vid.fps.num, pi->fmt.det.vid.fps.denum, pi->fmt.det.vid.fps.num/pi->fmt.det.vid.fps.denum)); } /* * Handle events from stream components. */ static pj_status_t stream_event_cb(pjmedia_event_subscription *esub, pjmedia_event *event) { pjmedia_vid_stream *stream = (pjmedia_vid_stream*)esub->user_data; if (esub == &stream->esub_codec) { /* This is codec event */ switch (event->type) { case PJMEDIA_EVENT_FMT_CHANGED: /* Update param from codec */ pjmedia_vid_codec_get_param(stream->codec, stream->info.codec_param); /* Update decoding channel port info */ pjmedia_format_copy(&stream->dec->port.info.fmt, &stream->info.codec_param->dec_fmt); /* we process the event */ ++event->proc_cnt; dump_port_info(event->data.fmt_changed.dir==PJMEDIA_DIR_DECODING ? stream->dec : stream->enc, "changed"); break; default: break; } } return pjmedia_event_publish(&stream->epub, event); } static pjmedia_event_publisher *port_get_epub(pjmedia_port *port) { pjmedia_vid_stream *stream = (pjmedia_vid_stream*) port->port_data.pdata; return &stream->epub; } #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA != 0 /* * Send keep-alive packet using non-codec frame. */ static void send_keep_alive_packet(pjmedia_vid_stream *stream) { #if PJMEDIA_STREAM_ENABLE_KA == PJMEDIA_STREAM_KA_EMPTY_RTP /* Keep-alive packet is empty RTP */ pj_status_t status; void *pkt; int pkt_len; TRC_((channel->port.info.name.ptr, "Sending keep-alive (RTCP and empty RTP)")); /* Send RTP */ status = pjmedia_rtp_encode_rtp( &stream->enc->rtp, stream->enc->pt, 0, 1, 0, (const void**)&pkt, &pkt_len); pj_assert(status == PJ_SUCCESS); pj_memcpy(stream->enc->buf, pkt, pkt_len); pjmedia_transport_send_rtp(stream->transport, stream->enc->buf, pkt_len); /* Send RTCP */ pjmedia_rtcp_build_rtcp(&stream->rtcp, &pkt, &pkt_len); pjmedia_transport_send_rtcp(stream->transport, pkt, pkt_len); #elif PJMEDIA_STREAM_ENABLE_KA == PJMEDIA_STREAM_KA_USER /* Keep-alive packet is defined in PJMEDIA_STREAM_KA_USER_PKT */ int pkt_len; const pj_str_t str_ka = PJMEDIA_STREAM_KA_USER_PKT; TRC_((channel->port.info.name.ptr, "Sending keep-alive (custom RTP/RTCP packets)")); /* Send to RTP port */ pj_memcpy(stream->enc->buf, str_ka.ptr, str_ka.slen); pkt_len = str_ka.slen; pjmedia_transport_send_rtp(stream->transport, stream->enc->buf, pkt_len); /* Send to RTCP port */ pjmedia_transport_send_rtcp(stream->transport, stream->enc->buf, pkt_len); #else PJ_UNUSED_ARG(stream); #endif } #endif /* defined(PJMEDIA_STREAM_ENABLE_KA) */ /** * check_tx_rtcp() * * This function is can be called by either put_frame() or get_frame(), * to transmit periodic RTCP SR/RR report. */ static void check_tx_rtcp(pjmedia_vid_stream *stream, pj_uint32_t timestamp) { /* Note that timestamp may represent local or remote timestamp, * depending on whether this function is called from put_frame() * or get_frame(). */ if (stream->rtcp_last_tx == 0) { stream->rtcp_last_tx = timestamp; } else if (timestamp - stream->rtcp_last_tx >= stream->rtcp_interval) { void *rtcp_pkt; int len; pjmedia_rtcp_build_rtcp(&stream->rtcp, &rtcp_pkt, &len); pjmedia_transport_send_rtcp(stream->transport, rtcp_pkt, len); stream->rtcp_last_tx = timestamp; } } /* Build RTCP SDES packet */ static unsigned create_rtcp_sdes(pjmedia_vid_stream *stream, pj_uint8_t *pkt, unsigned max_len) { pjmedia_rtcp_common hdr; pj_uint8_t *p = pkt; /* SDES header */ hdr.version = 2; hdr.p = 0; hdr.count = 1; hdr.pt = 202; hdr.length = 2 + (4+stream->cname.slen+3)/4 - 1; if (max_len < (hdr.length << 2)) { pj_assert(!"Not enough buffer for SDES packet"); return 0; } hdr.length = pj_htons((pj_uint16_t)hdr.length); hdr.ssrc = stream->enc->rtp.out_hdr.ssrc; pj_memcpy(p, &hdr, sizeof(hdr)); p += sizeof(hdr); /* CNAME item */ *p++ = 1; *p++ = (pj_uint8_t)stream->cname.slen; pj_memcpy(p, stream->cname.ptr, stream->cname.slen); p += stream->cname.slen; /* END */ *p++ = '\0'; *p++ = '\0'; /* Pad to 32bit */ while ((p-pkt) % 4) *p++ = '\0'; return (p - pkt); } /* Build RTCP BYE packet */ static unsigned create_rtcp_bye(pjmedia_vid_stream *stream, pj_uint8_t *pkt, unsigned max_len) { pjmedia_rtcp_common hdr; /* BYE header */ hdr.version = 2; hdr.p = 0; hdr.count = 1; hdr.pt = 203; hdr.length = 1; if (max_len < (hdr.length << 2)) { pj_assert(!"Not enough buffer for SDES packet"); return 0; } hdr.length = pj_htons((pj_uint16_t)hdr.length); hdr.ssrc = stream->enc->rtp.out_hdr.ssrc; pj_memcpy(pkt, &hdr, sizeof(hdr)); return sizeof(hdr); } #if 0 static void dump_bin(const char *buf, unsigned len) { unsigned i; PJ_LOG(3,(THIS_FILE, "begin dump")); for (i=0; idec; const pjmedia_rtp_hdr *hdr; const void *payload; unsigned payloadlen; pjmedia_rtp_status seq_st; pj_status_t status; pj_bool_t pkt_discarded = PJ_FALSE; /* Check for errors */ if (bytes_read < 0) { LOGERR_((channel->port.info.name.ptr, "RTP recv() error", -bytes_read)); return; } /* Ignore keep-alive packets */ if (bytes_read < (pj_ssize_t) sizeof(pjmedia_rtp_hdr)) return; /* Update RTP and RTCP session. */ status = pjmedia_rtp_decode_rtp(&channel->rtp, pkt, bytes_read, &hdr, &payload, &payloadlen); if (status != PJ_SUCCESS) { LOGERR_((channel->port.info.name.ptr, "RTP decode error", status)); stream->rtcp.stat.rx.discard++; return; } /* Ignore the packet if decoder is paused */ if (channel->paused) goto on_return; /* Update RTP session (also checks if RTP session can accept * the incoming packet. */ pjmedia_rtp_session_update2(&channel->rtp, hdr, &seq_st, PJ_TRUE); if (seq_st.status.value) { TRC_ ((channel->port.info.name.ptr, "RTP status: badpt=%d, badssrc=%d, dup=%d, " "outorder=%d, probation=%d, restart=%d", seq_st.status.flag.badpt, seq_st.status.flag.badssrc, seq_st.status.flag.dup, seq_st.status.flag.outorder, seq_st.status.flag.probation, seq_st.status.flag.restart)); if (seq_st.status.flag.badpt) { PJ_LOG(4,(channel->port.info.name.ptr, "Bad RTP pt %d (expecting %d)", hdr->pt, channel->rtp.out_pt)); } if (seq_st.status.flag.badssrc) { PJ_LOG(4,(channel->port.info.name.ptr, "Changed RTP peer SSRC %d (previously %d)", channel->rtp.peer_ssrc, stream->rtcp.peer_ssrc)); stream->rtcp.peer_ssrc = channel->rtp.peer_ssrc; } } /* Skip bad RTP packet */ if (seq_st.status.flag.bad) { pkt_discarded = PJ_TRUE; goto on_return; } /* Ignore if payloadlen is zero */ if (payloadlen == 0) { pkt_discarded = PJ_TRUE; goto on_return; } /* Put "good" packet to jitter buffer, or reset the jitter buffer * when RTP session is restarted. */ pj_mutex_lock( stream->jb_mutex ); if (seq_st.status.flag.restart) { status = pjmedia_jbuf_reset(stream->jb); PJ_LOG(4,(channel->port.info.name.ptr, "Jitter buffer reset")); } else { /* Just put the payload into jitter buffer */ pjmedia_jbuf_put_frame3(stream->jb, payload, payloadlen, 0, pj_ntohs(hdr->seq), pj_ntohl(hdr->ts), NULL); #if TRACE_JB trace_jb_put(stream, hdr, payloadlen, count); #endif } pj_mutex_unlock( stream->jb_mutex ); /* Check if now is the time to transmit RTCP SR/RR report. * We only do this when stream direction is "decoding only", * because otherwise check_tx_rtcp() will be handled by put_frame() */ if (stream->dir == PJMEDIA_DIR_DECODING) { check_tx_rtcp(stream, pj_ntohl(hdr->ts)); } if (status != 0) { LOGERR_((channel->port.info.name.ptr, "Jitter buffer put() error", status)); pkt_discarded = PJ_TRUE; goto on_return; } on_return: /* Update RTCP session */ if (stream->rtcp.peer_ssrc == 0) stream->rtcp.peer_ssrc = channel->rtp.peer_ssrc; pjmedia_rtcp_rx_rtp2(&stream->rtcp, pj_ntohs(hdr->seq), pj_ntohl(hdr->ts), payloadlen, pkt_discarded); /* Send RTCP RR and SDES after we receive some RTP packets */ if (stream->rtcp.received >= 10 && !stream->initial_rr) { void *sr_rr_pkt; pj_uint8_t *pkt; int len; /* Build RR or SR */ pjmedia_rtcp_build_rtcp(&stream->rtcp, &sr_rr_pkt, &len); pkt = (pj_uint8_t*) stream->enc->buf; pj_memcpy(pkt, sr_rr_pkt, len); pkt += len; /* Append SDES */ len = create_rtcp_sdes(stream, (pj_uint8_t*)pkt, stream->enc->buf_size - len); if (len > 0) { pkt += len; len = ((pj_uint8_t*)pkt) - ((pj_uint8_t*)stream->enc->buf); pjmedia_transport_send_rtcp(stream->transport, stream->enc->buf, len); } stream->initial_rr = PJ_TRUE; } } /* * This callback is called by stream transport on receipt of packets * in the RTCP socket. */ static void on_rx_rtcp( void *data, void *pkt, pj_ssize_t bytes_read) { pjmedia_vid_stream *stream = (pjmedia_vid_stream*) data; /* Check for errors */ if (bytes_read < 0) { LOGERR_((stream->cname.ptr, "RTCP recv() error", -bytes_read)); return; } pjmedia_rtcp_rx_rtcp(&stream->rtcp, pkt, bytes_read); } static pj_status_t put_frame(pjmedia_port *port, pjmedia_frame *frame) { pjmedia_vid_stream *stream = (pjmedia_vid_stream*) port->port_data.pdata; pjmedia_vid_channel *channel = stream->enc; pj_status_t status = 0; pjmedia_frame frame_out; unsigned rtp_ts_len; void *rtphdr; int rtphdrlen; pj_bool_t has_more_data = PJ_FALSE; pj_size_t total_sent = 0; #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA != 0 /* If the interval since last sending packet is greater than * PJMEDIA_STREAM_KA_INTERVAL, send keep-alive packet. */ if (stream->use_ka) { pj_uint32_t dtx_duration; dtx_duration = pj_timestamp_diff32(&stream->last_frm_ts_sent, &frame->timestamp); if (dtx_duration > PJMEDIA_STREAM_KA_INTERVAL * channel->port.info.clock_rate) { send_keep_alive_packet(stream); stream->last_frm_ts_sent = frame->timestamp; } } #endif /* Don't do anything if stream is paused */ if (channel->paused) { return PJ_SUCCESS; } /* Get frame length in timestamp unit */ rtp_ts_len = stream->frame_ts_len; /* Init frame_out buffer. */ frame_out.buf = ((char*)channel->buf) + sizeof(pjmedia_rtp_hdr); frame_out.size = 0; /* Encode! */ status = pjmedia_vid_codec_encode_begin(stream->codec, frame, channel->buf_size - sizeof(pjmedia_rtp_hdr), &frame_out, &has_more_data); if (status != PJ_SUCCESS) { LOGERR_((channel->port.info.name.ptr, "Codec encode_begin() error", status)); /* Update RTP timestamp */ pjmedia_rtp_encode_rtp(&channel->rtp, channel->pt, 1, 0, rtp_ts_len, (const void**)&rtphdr, &rtphdrlen); return status; } /* Loop while we have frame to send */ for (;;) { status = pjmedia_rtp_encode_rtp(&channel->rtp, channel->pt, (has_more_data == PJ_FALSE ? 1 : 0), frame_out.size, rtp_ts_len, (const void**)&rtphdr, &rtphdrlen); if (status != PJ_SUCCESS) { LOGERR_((channel->port.info.name.ptr, "RTP encode_rtp() error", status)); return status; } // Copy RTP header to the beginning of packet pj_memcpy(channel->buf, rtphdr, sizeof(pjmedia_rtp_hdr)); // Send the RTP packet to the transport. status = pjmedia_transport_send_rtp(stream->transport, (char*)channel->buf, frame_out.size + sizeof(pjmedia_rtp_hdr)); if (status != PJ_SUCCESS) { enum { COUNT_TO_REPORT = 20 }; if (stream->send_err_cnt++ == 0) { LOGERR_((channel->port.info.name.ptr, "Transport send_rtp() error (repeated %d times)", status)); if (stream->send_err_cnt > COUNT_TO_REPORT) stream->send_err_cnt = 0; } /* Ignore this error */ } total_sent += frame_out.size; if (!has_more_data) break; /* Next packets use same timestamp */ rtp_ts_len = 0; frame_out.size = 0; /* Encode more! */ status = pjmedia_vid_codec_encode_more(stream->codec, channel->buf_size - sizeof(pjmedia_rtp_hdr), &frame_out, &has_more_data); if (status != PJ_SUCCESS) { LOGERR_((channel->port.info.name.ptr, "Codec encode_more() error", status)); /* Ignore this error (?) */ break; } } /* Check if now is the time to transmit RTCP SR/RR report. * We only do this when stream direction is not "decoding only", because * when it is, check_tx_rtcp() will be handled by get_frame(). */ if (stream->dir != PJMEDIA_DIR_DECODING) { check_tx_rtcp(stream, pj_ntohl(channel->rtp.out_hdr.ts)); } /* Do nothing if we have nothing to transmit */ if (total_sent == 0) { return PJ_SUCCESS; } /* Update stat */ pjmedia_rtcp_tx_rtp(&stream->rtcp, total_sent); stream->rtcp.stat.rtp_tx_last_ts = pj_ntohl(stream->enc->rtp.out_hdr.ts); stream->rtcp.stat.rtp_tx_last_seq = pj_ntohs(stream->enc->rtp.out_hdr.seq); #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA!=0 /* Update timestamp of last sending packet. */ stream->last_frm_ts_sent = frame->timestamp; #endif return PJ_SUCCESS; } static pj_status_t get_frame(pjmedia_port *port, pjmedia_frame *frame) { pjmedia_vid_stream *stream = (pjmedia_vid_stream*) port->port_data.pdata; pjmedia_vid_channel *channel = stream->dec; pj_uint32_t last_ts = 0; int frm_first_seq = 0, frm_last_seq = 0; pj_bool_t got_frame = PJ_FALSE; unsigned cnt; pj_status_t status; /* Return no frame is channel is paused */ if (channel->paused) { frame->type = PJMEDIA_FRAME_TYPE_NONE; return PJ_SUCCESS; } /* Repeat get payload from the jitter buffer until all payloads with same * timestamp are collected. */ channel->buf_len = 0; /* Lock jitter buffer mutex first */ pj_mutex_lock( stream->jb_mutex ); /* Check if we got a decodable frame */ for (cnt=0; ; ++cnt) { char ptype; pj_uint32_t ts; int seq; /* Peek frame from jitter buffer. */ pjmedia_jbuf_peek_frame(stream->jb, cnt, NULL, NULL, &ptype, NULL, &ts, &seq); if (ptype == PJMEDIA_JB_NORMAL_FRAME) { if (last_ts == 0) { last_ts = ts; frm_first_seq = seq; } if (ts != last_ts) { got_frame = PJ_TRUE; break; } frm_last_seq = seq; } else if (ptype == PJMEDIA_JB_ZERO_EMPTY_FRAME) { /* No more packet in the jitter buffer */ break; } } if (got_frame) { unsigned i; /* Generate frame bitstream from the payload */ channel->buf_len = 0; if (cnt > stream->rx_frame_cnt) { PJ_LOG(1,(port->info.name.ptr, "Discarding %u frames because array is full!", cnt - stream->rx_frame_cnt)); pjmedia_jbuf_remove_frame(stream->jb, cnt - stream->rx_frame_cnt); cnt = stream->rx_frame_cnt; } for (i = 0; i < cnt; ++i) { char ptype; stream->rx_frames[i].type = PJMEDIA_FRAME_TYPE_VIDEO; stream->rx_frames[i].timestamp.u64 = last_ts; stream->rx_frames[i].bit_info = 0; /* We use jbuf_peek_frame() as it will returns the pointer of * the payload (no buffer and memcpy needed), just as we need. */ pjmedia_jbuf_peek_frame(stream->jb, i, (const void**)&stream->rx_frames[i].buf, &stream->rx_frames[i].size, &ptype, NULL, NULL, NULL); if (ptype != PJMEDIA_JB_NORMAL_FRAME) { /* Packet lost, must set payload to NULL and keep going */ stream->rx_frames[i].buf = NULL; stream->rx_frames[i].size = 0; stream->rx_frames[i].type = PJMEDIA_FRAME_TYPE_NONE; continue; } } /* Decode */ status = pjmedia_vid_codec_decode(stream->codec, cnt, stream->rx_frames, frame->size, frame); if (status != PJ_SUCCESS) { LOGERR_((port->info.name.ptr, "codec decode() error", status)); frame->type = PJMEDIA_FRAME_TYPE_NONE; frame->size = 0; } pjmedia_jbuf_remove_frame(stream->jb, cnt); } /* Unlock jitter buffer mutex. */ pj_mutex_unlock( stream->jb_mutex ); /* Learn remote frame rate after successful decoding */ if (0 && frame->type == PJMEDIA_FRAME_TYPE_VIDEO && frame->size) { /* Only check remote frame rate when timestamp is not wrapping and * sequence is increased by 1. */ if (last_ts > stream->last_dec_ts && frm_first_seq - stream->last_dec_seq == 1) { pj_uint32_t ts_diff; pjmedia_video_format_detail *vfd; ts_diff = last_ts - stream->last_dec_ts; vfd = pjmedia_format_get_video_format_detail( &channel->port.info.fmt, PJ_TRUE); if ((int)(stream->info.codec_info.clock_rate / ts_diff) != vfd->fps.num / vfd->fps.denum) { /* Frame rate changed, update decoding port info */ vfd->fps.num = stream->info.codec_info.clock_rate; vfd->fps.denum = ts_diff; /* Update stream info */ stream->info.codec_param->dec_fmt.det.vid.fps = vfd->fps; PJ_LOG(5, (channel->port.info.name.ptr, "Frame rate changed to %d/%d(~%d)fps", vfd->fps.num, vfd->fps.denum, vfd->fps.num / vfd->fps.denum)); /* Publish PJMEDIA_EVENT_FMT_CHANGED event */ if (pjmedia_event_publisher_has_sub(&stream->epub)) { pjmedia_event event; dump_port_info(stream->dec, "changed"); pjmedia_event_init(&event, PJMEDIA_EVENT_FMT_CHANGED, &frame->timestamp, &stream->epub); event.data.fmt_changed.dir = PJMEDIA_DIR_DECODING; pj_memcpy(&event.data.fmt_changed.new_fmt, &stream->info.codec_param->dec_fmt, sizeof(pjmedia_format)); pjmedia_event_publish(&stream->epub, &event); } } } /* Update last frame seq and timestamp */ stream->last_dec_seq = frm_last_seq; stream->last_dec_ts = last_ts; } return PJ_SUCCESS; } /* * Create media channel. */ static pj_status_t create_channel( pj_pool_t *pool, pjmedia_vid_stream *stream, pjmedia_dir dir, unsigned pt, const pjmedia_vid_stream_info *info, pjmedia_vid_channel **p_channel) { enum { M = 32 }; pjmedia_vid_channel *channel; pj_status_t status; unsigned min_out_pkt_size; pj_str_t name; const char *type_name; pjmedia_format *fmt; char fourcc_name[5]; pjmedia_port_info *pi; pj_assert(info->type == PJMEDIA_TYPE_VIDEO); pj_assert(dir == PJMEDIA_DIR_DECODING || dir == PJMEDIA_DIR_ENCODING); /* Allocate memory for channel descriptor */ channel = PJ_POOL_ZALLOC_T(pool, pjmedia_vid_channel); PJ_ASSERT_RETURN(channel != NULL, PJ_ENOMEM); /* Init vars */ if (dir==PJMEDIA_DIR_DECODING) { type_name = "vstdec"; fmt = &info->codec_param->dec_fmt; } else { type_name = "vstenc"; fmt = &info->codec_param->enc_fmt; } name.ptr = (char*) pj_pool_alloc(pool, M); name.slen = pj_ansi_snprintf(name.ptr, M, "%s%p", type_name, stream); pi = &channel->port.info; /* Init channel info. */ channel->stream = stream; channel->dir = dir; channel->paused = 1; channel->pt = pt; /* Allocate buffer for outgoing packet. */ channel->buf_size = sizeof(pjmedia_rtp_hdr) + stream->frame_size; /* It should big enough to hold (minimally) RTCP SR with an SDES. */ min_out_pkt_size = sizeof(pjmedia_rtcp_sr_pkt) + sizeof(pjmedia_rtcp_common) + (4 + stream->cname.slen) + 32; if (channel->buf_size < min_out_pkt_size) channel->buf_size = min_out_pkt_size; channel->buf = pj_pool_alloc(pool, channel->buf_size); PJ_ASSERT_RETURN(channel->buf != NULL, PJ_ENOMEM); /* Create RTP and RTCP sessions: */ if (info->rtp_seq_ts_set == 0) { status = pjmedia_rtp_session_init(&channel->rtp, pt, info->ssrc); } else { pjmedia_rtp_session_setting settings; settings.flags = (pj_uint8_t)((info->rtp_seq_ts_set << 2) | 3); settings.default_pt = pt; settings.sender_ssrc = info->ssrc; settings.seq = info->rtp_seq; settings.ts = info->rtp_ts; status = pjmedia_rtp_session_init2(&channel->rtp, settings); } if (status != PJ_SUCCESS) return status; /* Init port. */ pjmedia_port_info_init2(pi, &name, SIGNATURE, dir, fmt); if (dir == PJMEDIA_DIR_DECODING) { channel->port.get_frame = &get_frame; } else { pi->fmt.id = info->codec_param->dec_fmt.id; channel->port.put_frame = &put_frame; } /* Init port. */ channel->port.port_data.pdata = stream; channel->port.get_event_pub = &port_get_epub; PJ_LOG(5, (name.ptr, "%s channel created %dx%d %s%s%.*s %d/%d(~%d)fps", (dir==PJMEDIA_DIR_ENCODING?"Encoding":"Decoding"), pi->fmt.det.vid.size.w, pi->fmt.det.vid.size.h, pjmedia_fourcc_name(pi->fmt.id, fourcc_name), (dir==PJMEDIA_DIR_ENCODING?"->":"<-"), info->codec_info.encoding_name.slen, info->codec_info.encoding_name.ptr, pi->fmt.det.vid.fps.num, pi->fmt.det.vid.fps.denum, pi->fmt.det.vid.fps.num/pi->fmt.det.vid.fps.denum)); /* Done. */ *p_channel = channel; return PJ_SUCCESS; } /* * Create stream. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_create( pjmedia_endpt *endpt, pj_pool_t *pool, pjmedia_vid_stream_info *info, pjmedia_transport *tp, void *user_data, pjmedia_vid_stream **p_stream) { enum { M = 32 }; pj_pool_t *own_pool = NULL; pjmedia_vid_stream *stream; unsigned jb_init, jb_max, jb_min_pre, jb_max_pre, len; int frm_ptime, chunks_per_frm; pjmedia_video_format_detail *vfd_enc; char *p; unsigned mtu; pj_status_t status; if (!pool) { own_pool = pjmedia_endpt_create_pool( endpt, "vstrm%p", PJMEDIA_VSTREAM_SIZE, PJMEDIA_VSTREAM_INC); PJ_ASSERT_RETURN(own_pool != NULL, PJ_ENOMEM); pool = own_pool; } /* Allocate stream */ stream = PJ_POOL_ZALLOC_T(pool, pjmedia_vid_stream); PJ_ASSERT_RETURN(stream != NULL, PJ_ENOMEM); stream->own_pool = own_pool; /* Get codec manager */ stream->codec_mgr = pjmedia_vid_codec_mgr_instance(); PJ_ASSERT_RETURN(stream->codec_mgr, PJMEDIA_CODEC_EFAILED); /* Init stream/port name */ stream->name.ptr = (char*) pj_pool_alloc(pool, M); stream->name.slen = pj_ansi_snprintf(stream->name.ptr, M, "vstrm%p", stream); /* Create and initialize codec: */ status = pjmedia_vid_codec_mgr_alloc_codec(stream->codec_mgr, &info->codec_info, &stream->codec); if (status != PJ_SUCCESS) return status; /* Get codec param: */ if (!info->codec_param) { pjmedia_vid_codec_param def_param; status = pjmedia_vid_codec_mgr_get_default_param(stream->codec_mgr, &info->codec_info, &def_param); if (status != PJ_SUCCESS) return status; info->codec_param = pjmedia_vid_codec_param_clone(pool, &def_param); pj_assert(info->codec_param); } /* Init codec param and adjust MTU */ info->codec_param->dir = info->dir; info->codec_param->enc_mtu -= (sizeof(pjmedia_rtp_hdr) + PJMEDIA_STREAM_RESV_PAYLOAD_LEN); if (info->codec_param->enc_mtu > PJMEDIA_MAX_MTU) info->codec_param->enc_mtu = PJMEDIA_MAX_MTU; mtu = info->codec_param->enc_mtu; vfd_enc = pjmedia_format_get_video_format_detail( &info->codec_param->enc_fmt, PJ_TRUE); /* Init stream: */ stream->endpt = endpt; stream->dir = info->dir; stream->user_data = user_data; stream->rtcp_interval = (PJMEDIA_RTCP_INTERVAL-500 + (pj_rand()%1000)) * info->codec_info.clock_rate / 1000; stream->jb_last_frm = PJMEDIA_JB_NORMAL_FRAME; #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA!=0 stream->use_ka = info->use_ka; #endif /* Build random RTCP CNAME. CNAME has user@host format */ stream->cname.ptr = p = (char*) pj_pool_alloc(pool, 20); pj_create_random_string(p, 5); p += 5; *p++ = '@'; *p++ = 'p'; *p++ = 'j'; pj_create_random_string(p, 6); p += 6; *p++ = '.'; *p++ = 'o'; *p++ = 'r'; *p++ = 'g'; stream->cname.slen = p - stream->cname.ptr; /* Create mutex to protect jitter buffer: */ status = pj_mutex_create_simple(pool, NULL, &stream->jb_mutex); if (status != PJ_SUCCESS) return status; /* Init and open the codec. */ status = pjmedia_vid_codec_init(stream->codec, pool); if (status != PJ_SUCCESS) return status; status = pjmedia_vid_codec_open(stream->codec, info->codec_param); if (status != PJ_SUCCESS) return status; /* Init event publisher and subscribe to codec events */ pjmedia_event_publisher_init(&stream->epub, SIGNATURE); pjmedia_event_subscription_init(&stream->esub_codec, &stream_event_cb, stream); pjmedia_event_subscribe(&stream->codec->epub, &stream->esub_codec); /* Estimate the maximum frame size */ stream->frame_size = vfd_enc->size.w * vfd_enc->size.h * 4; #if 0 stream->frame_size = vfd_enc->max_bps/8 * vfd_enc->fps.denum / vfd_enc->fps.num; /* As the maximum frame_size is not represented directly by maximum bps * (which includes intra and predicted frames), let's increase the * frame size value for safety. */ stream->frame_size <<= 4; #endif /* Validate the frame size */ if (stream->frame_size == 0 || stream->frame_size > PJMEDIA_MAX_VIDEO_ENC_FRAME_SIZE) { stream->frame_size = PJMEDIA_MAX_VIDEO_ENC_FRAME_SIZE; } /* Get frame length in timestamp unit */ stream->frame_ts_len = info->codec_info.clock_rate * vfd_enc->fps.denum / vfd_enc->fps.num; /* Create decoder channel */ status = create_channel( pool, stream, PJMEDIA_DIR_DECODING, info->rx_pt, info, &stream->dec); if (status != PJ_SUCCESS) return status; /* Create encoder channel */ status = create_channel( pool, stream, PJMEDIA_DIR_ENCODING, info->tx_pt, info, &stream->enc); if (status != PJ_SUCCESS) return status; /* Init jitter buffer parameters: */ frm_ptime = 1000 * vfd_enc->fps.denum / vfd_enc->fps.num; chunks_per_frm = stream->frame_size / mtu; if (chunks_per_frm == 0) chunks_per_frm = 1; /* JB max count, default 500ms */ if (info->jb_max >= frm_ptime) jb_max = info->jb_max * chunks_per_frm / frm_ptime; else jb_max = 500 * chunks_per_frm / frm_ptime; /* JB min prefetch, default 1 frame */ if (info->jb_min_pre >= frm_ptime) jb_min_pre = info->jb_min_pre * chunks_per_frm / frm_ptime; else jb_min_pre = 1; /* JB max prefetch, default 4/5 JB max count */ if (info->jb_max_pre >= frm_ptime) jb_max_pre = info->jb_max_pre * chunks_per_frm / frm_ptime; else jb_max_pre = jb_max * 4 / 5; /* JB init prefetch, default 0 */ if (info->jb_init >= frm_ptime) jb_init = info->jb_init * chunks_per_frm / frm_ptime; else jb_init = 0; /* Allocate array for temporary storage for assembly of incoming * frames. Add more just in case. */ stream->rx_frame_cnt = chunks_per_frm * 2; stream->rx_frames = pj_pool_calloc(pool, stream->rx_frame_cnt, sizeof(stream->rx_frames[0])); /* Create jitter buffer */ status = pjmedia_jbuf_create(pool, &stream->dec->port.info.name, mtu + PJMEDIA_STREAM_RESV_PAYLOAD_LEN, 1000 * vfd_enc->fps.denum / vfd_enc->fps.num, jb_max, &stream->jb); if (status != PJ_SUCCESS) return status; /* Set up jitter buffer */ pjmedia_jbuf_set_adaptive( stream->jb, jb_init, jb_min_pre, jb_max_pre); //pjmedia_jbuf_enable_discard(stream->jb, PJ_FALSE); /* Init RTCP session: */ { pjmedia_rtcp_session_setting rtcp_setting; pjmedia_rtcp_session_setting_default(&rtcp_setting); rtcp_setting.name = stream->name.ptr; rtcp_setting.ssrc = info->ssrc; rtcp_setting.rtp_ts_base = pj_ntohl(stream->enc->rtp.out_hdr.ts); rtcp_setting.clock_rate = info->codec_info.clock_rate; rtcp_setting.samples_per_frame = 1; pjmedia_rtcp_init2(&stream->rtcp, &rtcp_setting); } /* Only attach transport when stream is ready. */ status = pjmedia_transport_attach(tp, stream, &info->rem_addr, &info->rem_rtcp, pj_sockaddr_get_len(&info->rem_addr), &on_rx_rtp, &on_rx_rtcp); if (status != PJ_SUCCESS) return status; stream->transport = tp; /* Send RTCP SDES */ len = create_rtcp_sdes(stream, (pj_uint8_t*)stream->enc->buf, stream->enc->buf_size); if (len != 0) { pjmedia_transport_send_rtcp(stream->transport, stream->enc->buf, len); } #if defined(PJMEDIA_STREAM_ENABLE_KA) && PJMEDIA_STREAM_ENABLE_KA!=0 /* NAT hole punching by sending KA packet via RTP transport. */ if (stream->use_ka) send_keep_alive_packet(stream); #endif #if TRACE_JB { char trace_name[PJ_MAXPATH]; pj_ssize_t len; pj_ansi_snprintf(trace_name, sizeof(trace_name), TRACE_JB_PATH_PREFIX "%s.csv", channel->port.info.name.ptr); status = pj_file_open(pool, trace_name, PJ_O_RDWR, &stream->trace_jb_fd); if (status != PJ_SUCCESS) { stream->trace_jb_fd = TRACE_JB_INVALID_FD; PJ_LOG(3,(THIS_FILE, "Failed creating RTP trace file '%s'", trace_name)); } else { stream->trace_jb_buf = (char*)pj_pool_alloc(pool, PJ_LOG_MAX_SIZE); /* Print column header */ len = pj_ansi_snprintf(stream->trace_jb_buf, PJ_LOG_MAX_SIZE, "Time, Operation, Size, Frame Count, " "Frame type, RTP Seq, RTP TS, RTP M, " "JB size, JB burst level, JB prefetch\n"); pj_file_write(stream->trace_jb_fd, stream->trace_jb_buf, &len); pj_file_flush(stream->trace_jb_fd); } } #endif /* Save the stream info */ pj_memcpy(&stream->info, info, sizeof(*info)); stream->info.codec_param = pjmedia_vid_codec_param_clone( pool, info->codec_param); /* Success! */ *p_stream = stream; PJ_LOG(5,(THIS_FILE, "Video stream %s created", stream->name.ptr)); return PJ_SUCCESS; } /* * Destroy stream. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_destroy( pjmedia_vid_stream *stream ) { unsigned len; PJ_ASSERT_RETURN(stream != NULL, PJ_EINVAL); /* Send RTCP BYE */ if (stream->enc && stream->transport) { len = create_rtcp_bye(stream, (pj_uint8_t*)stream->enc->buf, stream->enc->buf_size); if (len != 0) { pjmedia_transport_send_rtcp(stream->transport, stream->enc->buf, len); } } /* Detach from transport * MUST NOT hold stream mutex while detaching from transport, as * it may cause deadlock. See ticket #460 for the details. */ if (stream->transport) { pjmedia_transport_detach(stream->transport, stream); stream->transport = NULL; } /* This function may be called when stream is partly initialized. */ if (stream->jb_mutex) pj_mutex_lock(stream->jb_mutex); /* Free codec. */ if (stream->codec) { pjmedia_vid_codec_close(stream->codec); pjmedia_vid_codec_mgr_dealloc_codec(stream->codec_mgr, stream->codec); stream->codec = NULL; } /* Free mutex */ if (stream->jb_mutex) { pj_mutex_destroy(stream->jb_mutex); stream->jb_mutex = NULL; } /* Destroy jitter buffer */ if (stream->jb) { pjmedia_jbuf_destroy(stream->jb); stream->jb = NULL; } #if TRACE_JB if (TRACE_JB_OPENED(stream)) { pj_file_close(stream->trace_jb_fd); stream->trace_jb_fd = TRACE_JB_INVALID_FD; } #endif if (stream->own_pool) { pj_pool_t *pool = stream->own_pool; stream->own_pool = NULL; pj_pool_release(pool); } return PJ_SUCCESS; } /* * Get the port interface. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_get_port(pjmedia_vid_stream *stream, pjmedia_dir dir, pjmedia_port **p_port ) { PJ_ASSERT_RETURN(dir==PJMEDIA_DIR_ENCODING || dir==PJMEDIA_DIR_DECODING, PJ_EINVAL); if (dir == PJMEDIA_DIR_ENCODING) *p_port = &stream->enc->port; else *p_port = &stream->dec->port; return PJ_SUCCESS; } /* * Get the transport object */ PJ_DEF(pjmedia_transport*) pjmedia_vid_stream_get_transport( pjmedia_vid_stream *st) { return st->transport; } /* * Get stream statistics. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_get_stat( const pjmedia_vid_stream *stream, pjmedia_rtcp_stat *stat) { PJ_ASSERT_RETURN(stream && stat, PJ_EINVAL); pj_memcpy(stat, &stream->rtcp.stat, sizeof(pjmedia_rtcp_stat)); return PJ_SUCCESS; } /* * Reset the stream statistics in the middle of a stream session. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_reset_stat(pjmedia_vid_stream *stream) { PJ_ASSERT_RETURN(stream, PJ_EINVAL); pjmedia_rtcp_init_stat(&stream->rtcp.stat); return PJ_SUCCESS; } /* * Get jitter buffer state. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_get_stat_jbuf( const pjmedia_vid_stream *stream, pjmedia_jb_state *state) { PJ_ASSERT_RETURN(stream && state, PJ_EINVAL); return pjmedia_jbuf_get_state(stream->jb, state); } /* * Get the stream info. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_get_info( const pjmedia_vid_stream *stream, pjmedia_vid_stream_info *info) { PJ_ASSERT_RETURN(stream && info, PJ_EINVAL); pj_memcpy(info, &stream->info, sizeof(*info)); return PJ_SUCCESS; } /* * Start stream. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_start(pjmedia_vid_stream *stream) { PJ_ASSERT_RETURN(stream && stream->enc && stream->dec, PJ_EINVALIDOP); if (stream->enc && (stream->dir & PJMEDIA_DIR_ENCODING)) { stream->enc->paused = 0; //pjmedia_snd_stream_start(stream->enc->snd_stream); PJ_LOG(4,(stream->enc->port.info.name.ptr, "Encoder stream started")); } else { PJ_LOG(4,(stream->enc->port.info.name.ptr, "Encoder stream paused")); } if (stream->dec && (stream->dir & PJMEDIA_DIR_DECODING)) { stream->dec->paused = 0; //pjmedia_snd_stream_start(stream->dec->snd_stream); PJ_LOG(4,(stream->dec->port.info.name.ptr, "Decoder stream started")); } else { PJ_LOG(4,(stream->dec->port.info.name.ptr, "Decoder stream paused")); } return PJ_SUCCESS; } /* * Check status. */ PJ_DEF(pj_bool_t) pjmedia_vid_stream_is_running(pjmedia_vid_stream *stream, pjmedia_dir dir) { pj_bool_t is_running = PJ_TRUE; PJ_ASSERT_RETURN(stream, PJ_FALSE); if (dir & PJMEDIA_DIR_ENCODING) { is_running &= (stream->enc && !stream->enc->paused); } if (dir & PJMEDIA_DIR_DECODING) { is_running &= (stream->dec && !stream->dec->paused); } return is_running; } /* * Pause stream. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_pause(pjmedia_vid_stream *stream, pjmedia_dir dir) { PJ_ASSERT_RETURN(stream, PJ_EINVAL); if ((dir & PJMEDIA_DIR_ENCODING) && stream->enc) { stream->enc->paused = 1; PJ_LOG(4,(stream->enc->port.info.name.ptr, "Encoder stream paused")); } if ((dir & PJMEDIA_DIR_DECODING) && stream->dec) { stream->dec->paused = 1; /* Also reset jitter buffer */ pj_mutex_lock( stream->jb_mutex ); pjmedia_jbuf_reset(stream->jb); pj_mutex_unlock( stream->jb_mutex ); PJ_LOG(4,(stream->dec->port.info.name.ptr, "Decoder stream paused")); } return PJ_SUCCESS; } /* * Resume stream */ PJ_DEF(pj_status_t) pjmedia_vid_stream_resume(pjmedia_vid_stream *stream, pjmedia_dir dir) { PJ_ASSERT_RETURN(stream, PJ_EINVAL); if ((dir & PJMEDIA_DIR_ENCODING) && stream->enc) { stream->enc->paused = 0; PJ_LOG(4,(stream->enc->port.info.name.ptr, "Encoder stream resumed")); } if ((dir & PJMEDIA_DIR_DECODING) && stream->dec) { stream->dec->paused = 0; PJ_LOG(4,(stream->dec->port.info.name.ptr, "Decoder stream resumed")); } return PJ_SUCCESS; } static const pj_str_t ID_VIDEO = { "video", 5}; static const pj_str_t ID_IN = { "IN", 2 }; static const pj_str_t ID_IP4 = { "IP4", 3}; static const pj_str_t ID_IP6 = { "IP6", 3}; static const pj_str_t ID_RTP_AVP = { "RTP/AVP", 7 }; static const pj_str_t ID_RTP_SAVP = { "RTP/SAVP", 8 }; //static const pj_str_t ID_SDP_NAME = { "pjmedia", 7 }; static const pj_str_t ID_RTPMAP = { "rtpmap", 6 }; static const pj_str_t STR_INACTIVE = { "inactive", 8 }; static const pj_str_t STR_SENDRECV = { "sendrecv", 8 }; static const pj_str_t STR_SENDONLY = { "sendonly", 8 }; static const pj_str_t STR_RECVONLY = { "recvonly", 8 }; /* * Internal function for collecting codec info and param from the SDP media. */ static pj_status_t get_video_codec_info_param(pjmedia_vid_stream_info *si, pj_pool_t *pool, pjmedia_vid_codec_mgr *mgr, const pjmedia_sdp_media *local_m, const pjmedia_sdp_media *rem_m) { unsigned pt = 0; const pjmedia_vid_codec_info *p_info; pj_status_t status; pt = pj_strtoul(&local_m->desc.fmt[0]); /* Get codec info. */ status = pjmedia_vid_codec_mgr_get_codec_info(mgr, pt, &p_info); if (status != PJ_SUCCESS) return status; si->codec_info = *p_info; /* Get payload type for receiving direction */ si->rx_pt = pt; /* Get payload type for transmitting direction */ if (pt < 96) { /* For static payload type, pt's are symetric */ si->tx_pt = pt; } else { unsigned i; /* Determine payload type for outgoing channel, by finding * dynamic payload type in remote SDP that matches the answer. */ si->tx_pt = 0xFFFF; for (i=0; idesc.fmt_count; ++i) { if (pjmedia_sdp_neg_fmt_match(NULL, (pjmedia_sdp_media*)local_m, 0, (pjmedia_sdp_media*)rem_m, i, 0) == PJ_SUCCESS) { /* Found matched codec. */ si->tx_pt = pj_strtoul(&rem_m->desc.fmt[i]); break; } } if (si->tx_pt == 0xFFFF) return PJMEDIA_EMISSINGRTPMAP; } /* Request for codec with the correct packing for streaming */ si->codec_info.packings = PJMEDIA_VID_PACKING_PACKETS; /* Now that we have codec info, get the codec param. */ si->codec_param = PJ_POOL_ALLOC_T(pool, pjmedia_vid_codec_param); status = pjmedia_vid_codec_mgr_get_default_param(mgr, &si->codec_info, si->codec_param); /* Get remote fmtp for our encoder. */ pjmedia_stream_info_parse_fmtp(pool, rem_m, si->tx_pt, &si->codec_param->enc_fmtp); /* Get local fmtp for our decoder. */ pjmedia_stream_info_parse_fmtp(pool, local_m, si->rx_pt, &si->codec_param->dec_fmtp); /* When direction is NONE (it means SDP negotiation has failed) we don't * need to return a failure here, as returning failure will cause * the whole SDP to be rejected. See ticket #: * http:// * * Thanks Alain Totouom */ if (status != PJ_SUCCESS && si->dir != PJMEDIA_DIR_NONE) return status; return PJ_SUCCESS; } /* * Create stream info from SDP media line. */ PJ_DEF(pj_status_t) pjmedia_vid_stream_info_from_sdp( pjmedia_vid_stream_info *si, pj_pool_t *pool, pjmedia_endpt *endpt, const pjmedia_sdp_session *local, const pjmedia_sdp_session *remote, unsigned stream_idx) { const pjmedia_sdp_attr *attr; const pjmedia_sdp_media *local_m; const pjmedia_sdp_media *rem_m; const pjmedia_sdp_conn *local_conn; const pjmedia_sdp_conn *rem_conn; int rem_af, local_af; pj_sockaddr local_addr; pj_status_t status; PJ_UNUSED_ARG(endpt); /* Validate arguments: */ PJ_ASSERT_RETURN(pool && si && local && remote, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < local->media_count, PJ_EINVAL); PJ_ASSERT_RETURN(stream_idx < remote->media_count, PJ_EINVAL); /* Keep SDP shortcuts */ local_m = local->media[stream_idx]; rem_m = remote->media[stream_idx]; local_conn = local_m->conn ? local_m->conn : local->conn; if (local_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; rem_conn = rem_m->conn ? rem_m->conn : remote->conn; if (rem_conn == NULL) return PJMEDIA_SDP_EMISSINGCONN; /* Media type must be video */ if (pj_stricmp(&local_m->desc.media, &ID_VIDEO) != 0) return PJMEDIA_EINVALIMEDIATYPE; /* Reset: */ pj_bzero(si, sizeof(*si)); /* Media type: */ si->type = PJMEDIA_TYPE_VIDEO; /* Transport protocol */ /* At this point, transport type must be compatible, * the transport instance will do more validation later. */ status = pjmedia_sdp_transport_cmp(&rem_m->desc.transport, &local_m->desc.transport); if (status != PJ_SUCCESS) return PJMEDIA_SDPNEG_EINVANSTP; if (pj_stricmp(&local_m->desc.transport, &ID_RTP_AVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_AVP; } else if (pj_stricmp(&local_m->desc.transport, &ID_RTP_SAVP) == 0) { si->proto = PJMEDIA_TP_PROTO_RTP_SAVP; } else { si->proto = PJMEDIA_TP_PROTO_UNKNOWN; return PJ_SUCCESS; } /* Check address family in remote SDP */ rem_af = pj_AF_UNSPEC(); if (pj_stricmp(&rem_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&rem_conn->addr_type, &ID_IP4)==0) { rem_af = pj_AF_INET(); } else if (pj_stricmp(&rem_conn->addr_type, &ID_IP6)==0) { rem_af = pj_AF_INET6(); } } if (rem_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_EAFNOTSUP; } /* Set remote address: */ status = pj_sockaddr_init(rem_af, &si->rem_addr, &rem_conn->addr, rem_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Check address family of local info */ local_af = pj_AF_UNSPEC(); if (pj_stricmp(&local_conn->net_type, &ID_IN)==0) { if (pj_stricmp(&local_conn->addr_type, &ID_IP4)==0) { local_af = pj_AF_INET(); } else if (pj_stricmp(&local_conn->addr_type, &ID_IP6)==0) { local_af = pj_AF_INET6(); } } if (local_af==pj_AF_UNSPEC()) { /* Unsupported address family */ return PJ_SUCCESS; } /* Set remote address: */ status = pj_sockaddr_init(local_af, &local_addr, &local_conn->addr, local_m->desc.port); if (status != PJ_SUCCESS) { /* Invalid IP address. */ return PJMEDIA_EINVALIDIP; } /* Local and remote address family must match */ if (local_af != rem_af) return PJ_EAFNOTSUP; /* Media direction: */ if (local_m->desc.port == 0 || pj_sockaddr_has_addr(&local_addr)==PJ_FALSE || pj_sockaddr_has_addr(&si->rem_addr)==PJ_FALSE || pjmedia_sdp_media_find_attr(local_m, &STR_INACTIVE, NULL)!=NULL) { /* Inactive stream. */ si->dir = PJMEDIA_DIR_NONE; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_SENDONLY, NULL)!=NULL) { /* Send only stream. */ si->dir = PJMEDIA_DIR_ENCODING; } else if (pjmedia_sdp_media_find_attr(local_m, &STR_RECVONLY, NULL)!=NULL) { /* Recv only stream. */ si->dir = PJMEDIA_DIR_DECODING; } else { /* Send and receive stream. */ si->dir = PJMEDIA_DIR_ENCODING_DECODING; } /* No need to do anything else if stream is rejected */ if (local_m->desc.port == 0) { return PJ_SUCCESS; } /* If "rtcp" attribute is present in the SDP, set the RTCP address * from that attribute. Otherwise, calculate from RTP address. */ attr = pjmedia_sdp_attr_find2(rem_m->attr_count, rem_m->attr, "rtcp", NULL); if (attr) { pjmedia_sdp_rtcp_attr rtcp; status = pjmedia_sdp_attr_get_rtcp(attr, &rtcp); if (status == PJ_SUCCESS) { if (rtcp.addr.slen) { status = pj_sockaddr_init(rem_af, &si->rem_rtcp, &rtcp.addr, (pj_uint16_t)rtcp.port); } else { pj_sockaddr_init(rem_af, &si->rem_rtcp, NULL, (pj_uint16_t)rtcp.port); pj_memcpy(pj_sockaddr_get_addr(&si->rem_rtcp), pj_sockaddr_get_addr(&si->rem_addr), pj_sockaddr_get_addr_len(&si->rem_addr)); } } } if (!pj_sockaddr_has_addr(&si->rem_rtcp)) { int rtcp_port; pj_memcpy(&si->rem_rtcp, &si->rem_addr, sizeof(pj_sockaddr)); rtcp_port = pj_sockaddr_get_port(&si->rem_addr) + 1; pj_sockaddr_set_port(&si->rem_rtcp, (pj_uint16_t)rtcp_port); } /* Get codec info and param */ status = get_video_codec_info_param(si, pool, NULL, local_m, rem_m); /* Leave SSRC to random. */ si->ssrc = pj_rand(); /* Set default jitter buffer parameter. */ si->jb_init = si->jb_max = si->jb_min_pre = si->jb_max_pre = -1; return status; } #endif /* PJMEDIA_HAS_VIDEO */