-AVRtpPayloadType_t AVRtpPayloadTypes[]=
-{
- {0, "PCMU", CODEC_TYPE_AUDIO, CODEC_ID_PCM_MULAW, 8000, 1},
- {1, "Reserved", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {2, "Reserved", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {3, "GSM", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {4, "G723", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {5, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {6, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 16000, 1},
- {7, "LPC", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {8, "PCMA", CODEC_TYPE_AUDIO, CODEC_ID_PCM_ALAW, 8000, 1},
- {9, "G722", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {10, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 2},
- {11, "L16", CODEC_TYPE_AUDIO, CODEC_ID_PCM_S16BE, 44100, 1},
- {12, "QCELP", CODEC_TYPE_AUDIO, CODEC_ID_QCELP, 8000, 1},
- {13, "CN", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {14, "MPA", CODEC_TYPE_AUDIO, CODEC_ID_MP2, 90000, -1},
- {15, "G728", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {16, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 11025, 1},
- {17, "DVI4", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 22050, 1},
- {18, "G729", CODEC_TYPE_AUDIO, CODEC_ID_NONE, 8000, 1},
- {19, "reserved", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
- {20, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
- {21, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
- {22, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
- {23, "unassigned", CODEC_TYPE_AUDIO, CODEC_ID_NONE, -1, -1},
- {24, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
- {25, "CelB", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
- {26, "JPEG", CODEC_TYPE_VIDEO, CODEC_ID_MJPEG, 90000, -1},
- {27, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
- {28, "nv", CODEC_TYPE_VIDEO, CODEC_ID_NONE, 90000, -1},
- {29, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
- {30, "unassigned", CODEC_TYPE_VIDEO, CODEC_ID_NONE, -1, -1},
- {31, "H261", CODEC_TYPE_VIDEO, CODEC_ID_H261, 90000, -1},
- {32, "MPV", CODEC_TYPE_VIDEO, CODEC_ID_MPEG1VIDEO, 90000, -1},
- {33, "MP2T", CODEC_TYPE_DATA, CODEC_ID_MPEG2TS, 90000, -1},
- {34, "H263", CODEC_TYPE_VIDEO, CODEC_ID_H263, 90000, -1},
- {35, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {36, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {37, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {38, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {39, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {40, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {41, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {42, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {43, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {44, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {45, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {46, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {47, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {48, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {49, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {50, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {51, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {52, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {53, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {54, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {55, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {56, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {57, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {58, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {59, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {60, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {61, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {62, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {63, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {64, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {65, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {66, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {67, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {68, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {69, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {70, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {71, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {72, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {73, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {74, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {75, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {76, "reserved for RTCP conflict avoidance", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {77, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {78, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {79, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {80, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {81, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {82, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {83, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {84, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {85, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {86, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {87, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {88, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {89, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {90, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {91, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {92, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {93, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {94, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {95, "unassigned", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {96, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {97, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {98, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {99, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {100, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {101, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {102, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {103, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {104, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {105, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {106, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {107, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {108, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {109, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {110, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {111, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {112, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {113, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {114, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {115, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {116, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {117, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {118, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {119, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {120, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {121, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {122, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {123, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {124, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {125, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {126, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {127, "dynamic", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1},
- {-1, "", CODEC_TYPE_UNKNOWN, CODEC_ID_NONE, -1, -1}
-};
-
-/* statistics functions */
-RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
-
-static RTPDynamicProtocolHandler mp4v_es_handler= {"MP4V-ES", CODEC_TYPE_VIDEO, CODEC_ID_MPEG4};
-static RTPDynamicProtocolHandler mpeg4_generic_handler= {"mpeg4-generic", CODEC_TYPE_AUDIO, CODEC_ID_AAC};
-
-static void register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
-{
- handler->next= RTPFirstDynamicPayloadHandler;
- RTPFirstDynamicPayloadHandler= handler;
-}
-
-void av_register_rtp_dynamic_payload_handlers()
-{
- register_dynamic_payload_handler(&mp4v_es_handler);
- register_dynamic_payload_handler(&mpeg4_generic_handler);
- register_dynamic_payload_handler(&ff_h264_dynamic_handler);
-}
-
-int rtp_get_codec_info(AVCodecContext *codec, int payload_type)
-{
- if (AVRtpPayloadTypes[payload_type].codec_id != CODEC_ID_NONE) {
- codec->codec_type = AVRtpPayloadTypes[payload_type].codec_type;
- codec->codec_id = AVRtpPayloadTypes[payload_type].codec_id;
- if (AVRtpPayloadTypes[payload_type].audio_channels > 0)
- codec->channels = AVRtpPayloadTypes[payload_type].audio_channels;
- if (AVRtpPayloadTypes[payload_type].clock_rate > 0)
- codec->sample_rate = AVRtpPayloadTypes[payload_type].clock_rate;
- return 0;
- }
- return -1;
-}
-
-/* return < 0 if unknown payload type */
-int rtp_get_payload_type(AVCodecContext *codec)
-{
- int i, payload_type;
-
- /* compute the payload type */
- for (payload_type = -1, i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
- if (AVRtpPayloadTypes[i].codec_id == codec->codec_id) {
- if (codec->codec_id == CODEC_ID_PCM_S16BE)
- if (codec->channels != AVRtpPayloadTypes[i].audio_channels)
- continue;
- payload_type = AVRtpPayloadTypes[i].pt;
- }
- return payload_type;
-}
-
-static inline uint32_t decode_be32(const uint8_t *p)
-{
- return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
-}
-
-static inline uint64_t decode_be64(const uint8_t *p)
-{
- return ((uint64_t)decode_be32(p) << 32) | decode_be32(p + 4);
-}
-
-static int rtcp_parse_packet(RTPDemuxContext *s, const unsigned char *buf, int len)
-{
- if (buf[1] != 200)
- return -1;
- s->last_rtcp_ntp_time = decode_be64(buf + 8);
- if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE)
- s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
- s->last_rtcp_timestamp = decode_be32(buf + 16);
- return 0;
-}
-
-#define RTP_SEQ_MOD (1<<16)
-
-/**
-* called on parse open packet
-*/
-static void rtp_init_statistics(RTPStatistics *s, uint16_t base_sequence) // called on parse open packet.
-{
- memset(s, 0, sizeof(RTPStatistics));
- s->max_seq= base_sequence;
- s->probation= 1;
-}
-
-/**
-* called whenever there is a large jump in sequence numbers, or when they get out of probation...
-*/
-static void rtp_init_sequence(RTPStatistics *s, uint16_t seq)
-{
- s->max_seq= seq;
- s->cycles= 0;
- s->base_seq= seq -1;
- s->bad_seq= RTP_SEQ_MOD + 1;
- s->received= 0;
- s->expected_prior= 0;
- s->received_prior= 0;
- s->jitter= 0;
- s->transit= 0;
-}
-
-/**
-* returns 1 if we should handle this packet.
-*/
-static int rtp_valid_packet_in_sequence(RTPStatistics *s, uint16_t seq)
-{
- uint16_t udelta= seq - s->max_seq;
- const int MAX_DROPOUT= 3000;
- const int MAX_MISORDER = 100;
- const int MIN_SEQUENTIAL = 2;
-
- /* source not valid until MIN_SEQUENTIAL packets with sequence seq. numbers have been received */
- if(s->probation)
- {
- if(seq==s->max_seq + 1) {
- s->probation--;
- s->max_seq= seq;
- if(s->probation==0) {
- rtp_init_sequence(s, seq);
- s->received++;
- return 1;
- }
- } else {
- s->probation= MIN_SEQUENTIAL - 1;
- s->max_seq = seq;
- }
- } else if (udelta < MAX_DROPOUT) {
- // in order, with permissible gap
- if(seq < s->max_seq) {
- //sequence number wrapped; count antother 64k cycles
- s->cycles += RTP_SEQ_MOD;
- }
- s->max_seq= seq;
- } else if (udelta <= RTP_SEQ_MOD - MAX_MISORDER) {
- // sequence made a large jump...
- if(seq==s->bad_seq) {
- // two sequential packets-- assume that the other side restarted without telling us; just resync.
- rtp_init_sequence(s, seq);
- } else {
- s->bad_seq= (seq + 1) & (RTP_SEQ_MOD-1);
- return 0;
- }
- } else {
- // duplicate or reordered packet...
- }
- s->received++;
- return 1;
-}
-
-#if 0
-/**
-* This function is currently unused; without a valid local ntp time, I don't see how we could calculate the
-* difference between the arrival and sent timestamp. As a result, the jitter and transit statistics values
-* never change. I left this in in case someone else can see a way. (rdm)
-*/
-static void rtcp_update_jitter(RTPStatistics *s, uint32_t sent_timestamp, uint32_t arrival_timestamp)
-{
- uint32_t transit= arrival_timestamp - sent_timestamp;
- int d;
- s->transit= transit;
- d= FFABS(transit - s->transit);
- s->jitter += d - ((s->jitter + 8)>>4);
-}
-#endif
-
-/**
- * some rtp servers assume client is dead if they don't hear from them...
- * so we send a Receiver Report to the provided ByteIO context
- * (we don't have access to the rtcp handle from here)
- */
-int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
-{
- ByteIOContext pb;
- uint8_t *buf;
- int len;
- int rtcp_bytes;
- RTPStatistics *stats= &s->statistics;
- uint32_t lost;
- uint32_t extended_max;
- uint32_t expected_interval;
- uint32_t received_interval;
- uint32_t lost_interval;
- uint32_t expected;
- uint32_t fraction;
- uint64_t ntp_time= s->last_rtcp_ntp_time; // TODO: Get local ntp time?
-
- if (!s->rtp_ctx || (count < 1))
- return -1;
-
- /* TODO: I think this is way too often; RFC 1889 has algorithm for this */
- /* XXX: mpeg pts hardcoded. RTCP send every 0.5 seconds */
- s->octet_count += count;
- rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
- RTCP_TX_RATIO_DEN;
- rtcp_bytes /= 50; // mmu_man: that's enough for me... VLC sends much less btw !?
- if (rtcp_bytes < 28)
- return -1;
- s->last_octet_count = s->octet_count;
-
- if (url_open_dyn_buf(&pb) < 0)
- return -1;
-
- // Receiver Report
- put_byte(&pb, (RTP_VERSION << 6) + 1); /* 1 report block */
- put_byte(&pb, 201);
- put_be16(&pb, 7); /* length in words - 1 */
- put_be32(&pb, s->ssrc); // our own SSRC
- put_be32(&pb, s->ssrc); // XXX: should be the server's here!
- // some placeholders we should really fill...
- // RFC 1889/p64
- extended_max= stats->cycles + stats->max_seq;
- expected= extended_max - stats->base_seq + 1;
- lost= expected - stats->received;
- lost= FFMIN(lost, 0xffffff); // clamp it since it's only 24 bits...
- expected_interval= expected - stats->expected_prior;
- stats->expected_prior= expected;
- received_interval= stats->received - stats->received_prior;
- stats->received_prior= stats->received;
- lost_interval= expected_interval - received_interval;
- if (expected_interval==0 || lost_interval<=0) fraction= 0;
- else fraction = (lost_interval<<8)/expected_interval;
-
- fraction= (fraction<<24) | lost;
-
- put_be32(&pb, fraction); /* 8 bits of fraction, 24 bits of total packets lost */
- put_be32(&pb, extended_max); /* max sequence received */
- put_be32(&pb, stats->jitter>>4); /* jitter */
-
- if(s->last_rtcp_ntp_time==AV_NOPTS_VALUE)
- {
- put_be32(&pb, 0); /* last SR timestamp */
- put_be32(&pb, 0); /* delay since last SR */
- } else {
- uint32_t middle_32_bits= s->last_rtcp_ntp_time>>16; // this is valid, right? do we need to handle 64 bit values special?
- uint32_t delay_since_last= ntp_time - s->last_rtcp_ntp_time;
-
- put_be32(&pb, middle_32_bits); /* last SR timestamp */
- put_be32(&pb, delay_since_last); /* delay since last SR */
- }
-
- // CNAME
- put_byte(&pb, (RTP_VERSION << 6) + 1); /* 1 report block */
- put_byte(&pb, 202);
- len = strlen(s->hostname);
- put_be16(&pb, (6 + len + 3) / 4); /* length in words - 1 */
- put_be32(&pb, s->ssrc);
- put_byte(&pb, 0x01);
- put_byte(&pb, len);
- put_buffer(&pb, s->hostname, len);
- // padding
- for (len = (6 + len) % 4; len % 4; len++) {
- put_byte(&pb, 0);
- }
-
- put_flush_packet(&pb);
- len = url_close_dyn_buf(&pb, &buf);
- if ((len > 0) && buf) {
- int result;
-#if defined(DEBUG)
- printf("sending %d bytes of RR\n", len);
-#endif
- result= url_write(s->rtp_ctx, buf, len);
-#if defined(DEBUG)
- printf("result from url_write: %d\n", result);
-#endif
- av_free(buf);
- }
- return 0;
-}
-
-/**
- * open a new RTP parse context for stream 'st'. 'st' can be NULL for
- * MPEG2TS streams to indicate that they should be demuxed inside the
- * rtp demux (otherwise CODEC_ID_MPEG2TS packets are returned)
- * TODO: change this to not take rtp_payload data, and use the new dynamic payload system.
- */
-RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, rtp_payload_data_t *rtp_payload_data)
-{
- RTPDemuxContext *s;
-
- s = av_mallocz(sizeof(RTPDemuxContext));
- if (!s)
- return NULL;
- s->payload_type = payload_type;
- s->last_rtcp_ntp_time = AV_NOPTS_VALUE;
- s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
- s->ic = s1;
- s->st = st;
- s->rtp_payload_data = rtp_payload_data;
- rtp_init_statistics(&s->statistics, 0); // do we know the initial sequence from sdp?
- if (!strcmp(AVRtpPayloadTypes[payload_type].enc_name, "MP2T")) {
- s->ts = mpegts_parse_open(s->ic);
- if (s->ts == NULL) {
- av_free(s);
- return NULL;
- }
- } else {
- switch(st->codec->codec_id) {
- case CODEC_ID_MPEG1VIDEO:
- case CODEC_ID_MPEG2VIDEO:
- case CODEC_ID_MP2:
- case CODEC_ID_MP3:
- case CODEC_ID_MPEG4:
- case CODEC_ID_H264:
- st->need_parsing = 1;
- break;
- default:
- break;
- }
- }
- // needed to send back RTCP RR in RTSP sessions
- s->rtp_ctx = rtpc;
- gethostname(s->hostname, sizeof(s->hostname));
- return s;
-}
-
-static int rtp_parse_mp4_au(RTPDemuxContext *s, const uint8_t *buf)
-{
- int au_headers_length, au_header_size, i;
- GetBitContext getbitcontext;
- rtp_payload_data_t *infos;
-
- infos = s->rtp_payload_data;
-
- if (infos == NULL)
- return -1;
-
- /* decode the first 2 bytes where are stored the AUHeader sections
- length in bits */
- au_headers_length = BE_16(buf);
-
- if (au_headers_length > RTP_MAX_PACKET_LENGTH)
- return -1;
-
- infos->au_headers_length_bytes = (au_headers_length + 7) / 8;
-
- /* skip AU headers length section (2 bytes) */
- buf += 2;
-
- init_get_bits(&getbitcontext, buf, infos->au_headers_length_bytes * 8);
-
- /* XXX: Wrong if optionnal additional sections are present (cts, dts etc...) */
- au_header_size = infos->sizelength + infos->indexlength;
- if (au_header_size <= 0 || (au_headers_length % au_header_size != 0))
- return -1;
-
- infos->nb_au_headers = au_headers_length / au_header_size;
- infos->au_headers = av_malloc(sizeof(struct AUHeaders) * infos->nb_au_headers);
-
- /* XXX: We handle multiple AU Section as only one (need to fix this for interleaving)
- In my test, the faad decoder doesnt behave correctly when sending each AU one by one
- but does when sending the whole as one big packet... */
- infos->au_headers[0].size = 0;
- infos->au_headers[0].index = 0;
- for (i = 0; i < infos->nb_au_headers; ++i) {
- infos->au_headers[0].size += get_bits_long(&getbitcontext, infos->sizelength);
- infos->au_headers[0].index = get_bits_long(&getbitcontext, infos->indexlength);
- }
-
- infos->nb_au_headers = 1;
-
- return 0;
-}
-
-/**
- * This was the second switch in rtp_parse packet. Normalizes time, if required, sets stream_index, etc.