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00023 #define _XOPEN_SOURCE 600
00024
00025 #include "libavcodec/get_bits.h"
00026 #include "avformat.h"
00027 #include "mpegts.h"
00028
00029 #include <unistd.h>
00030 #include <strings.h>
00031 #include "network.h"
00032
00033 #include "rtpdec.h"
00034 #include "rtpdec_formats.h"
00035
00036
00037
00038
00039
00040
00041
00042
00043
00044
00045
00046
00047 static RTPDynamicProtocolHandler ff_realmedia_mp3_dynamic_handler = {
00048 .enc_name = "X-MP3-draft-00",
00049 .codec_type = AVMEDIA_TYPE_AUDIO,
00050 .codec_id = CODEC_ID_MP3ADU,
00051 };
00052
00053
00054 static RTPDynamicProtocolHandler *RTPFirstDynamicPayloadHandler= NULL;
00055
00056 void ff_register_dynamic_payload_handler(RTPDynamicProtocolHandler *handler)
00057 {
00058 handler->next= RTPFirstDynamicPayloadHandler;
00059 RTPFirstDynamicPayloadHandler= handler;
00060 }
00061
00062 void av_register_rtp_dynamic_payload_handlers(void)
00063 {
00064 ff_register_dynamic_payload_handler(&ff_mp4v_es_dynamic_handler);
00065 ff_register_dynamic_payload_handler(&ff_mpeg4_generic_dynamic_handler);
00066 ff_register_dynamic_payload_handler(&ff_amr_nb_dynamic_handler);
00067 ff_register_dynamic_payload_handler(&ff_amr_wb_dynamic_handler);
00068 ff_register_dynamic_payload_handler(&ff_h263_1998_dynamic_handler);
00069 ff_register_dynamic_payload_handler(&ff_h263_2000_dynamic_handler);
00070 ff_register_dynamic_payload_handler(&ff_h264_dynamic_handler);
00071 ff_register_dynamic_payload_handler(&ff_vorbis_dynamic_handler);
00072 ff_register_dynamic_payload_handler(&ff_theora_dynamic_handler);
00073 ff_register_dynamic_payload_handler(&ff_qdm2_dynamic_handler);
00074 ff_register_dynamic_payload_handler(&ff_svq3_dynamic_handler);
00075 ff_register_dynamic_payload_handler(&ff_mp4a_latm_dynamic_handler);
00076 ff_register_dynamic_payload_handler(&ff_vp8_dynamic_handler);
00077 ff_register_dynamic_payload_handler(&ff_qcelp_dynamic_handler);
00078 ff_register_dynamic_payload_handler(&ff_realmedia_mp3_dynamic_handler);
00079
00080 ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfv_handler);
00081 ff_register_dynamic_payload_handler(&ff_ms_rtp_asf_pfa_handler);
00082
00083 ff_register_dynamic_payload_handler(&ff_qt_rtp_aud_handler);
00084 ff_register_dynamic_payload_handler(&ff_qt_rtp_vid_handler);
00085 ff_register_dynamic_payload_handler(&ff_quicktime_rtp_aud_handler);
00086 ff_register_dynamic_payload_handler(&ff_quicktime_rtp_vid_handler);
00087 }
00088
00089 RTPDynamicProtocolHandler *ff_rtp_handler_find_by_name(const char *name,
00090 enum AVMediaType codec_type)
00091 {
00092 RTPDynamicProtocolHandler *handler;
00093 for (handler = RTPFirstDynamicPayloadHandler;
00094 handler; handler = handler->next)
00095 if (!strcasecmp(name, handler->enc_name) &&
00096 codec_type == handler->codec_type)
00097 return handler;
00098 return NULL;
00099 }
00100
00101 RTPDynamicProtocolHandler *ff_rtp_handler_find_by_id(int id,
00102 enum AVMediaType codec_type)
00103 {
00104 RTPDynamicProtocolHandler *handler;
00105 for (handler = RTPFirstDynamicPayloadHandler;
00106 handler; handler = handler->next)
00107 if (handler->static_payload_id && handler->static_payload_id == id &&
00108 codec_type == handler->codec_type)
00109 return handler;
00110 return NULL;
00111 }
00112
00113 static int rtcp_parse_packet(RTPDemuxContext *s, const unsigned char *buf, int len)
00114 {
00115 int payload_len;
00116 while (len >= 2) {
00117 switch (buf[1]) {
00118 case RTCP_SR:
00119 if (len < 16) {
00120 av_log(NULL, AV_LOG_ERROR, "Invalid length for RTCP SR packet\n");
00121 return AVERROR_INVALIDDATA;
00122 }
00123 payload_len = (AV_RB16(buf + 2) + 1) * 4;
00124
00125 s->last_rtcp_ntp_time = AV_RB64(buf + 8);
00126 s->last_rtcp_timestamp = AV_RB32(buf + 16);
00127 if (s->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
00128 s->first_rtcp_ntp_time = s->last_rtcp_ntp_time;
00129 if (!s->base_timestamp)
00130 s->base_timestamp = s->last_rtcp_timestamp;
00131 s->rtcp_ts_offset = s->last_rtcp_timestamp - s->base_timestamp;
00132 }
00133
00134 buf += payload_len;
00135 len -= payload_len;
00136 break;
00137 case RTCP_BYE:
00138 return -RTCP_BYE;
00139 default:
00140 return -1;
00141 }
00142 }
00143 return -1;
00144 }
00145
00146 #define RTP_SEQ_MOD (1<<16)
00147
00151 static void rtp_init_statistics(RTPStatistics *s, uint16_t base_sequence)
00152 {
00153 memset(s, 0, sizeof(RTPStatistics));
00154 s->max_seq= base_sequence;
00155 s->probation= 1;
00156 }
00157
00161 static void rtp_init_sequence(RTPStatistics *s, uint16_t seq)
00162 {
00163 s->max_seq= seq;
00164 s->cycles= 0;
00165 s->base_seq= seq -1;
00166 s->bad_seq= RTP_SEQ_MOD + 1;
00167 s->received= 0;
00168 s->expected_prior= 0;
00169 s->received_prior= 0;
00170 s->jitter= 0;
00171 s->transit= 0;
00172 }
00173
00177 static int rtp_valid_packet_in_sequence(RTPStatistics *s, uint16_t seq)
00178 {
00179 uint16_t udelta= seq - s->max_seq;
00180 const int MAX_DROPOUT= 3000;
00181 const int MAX_MISORDER = 100;
00182 const int MIN_SEQUENTIAL = 2;
00183
00184
00185 if(s->probation)
00186 {
00187 if(seq==s->max_seq + 1) {
00188 s->probation--;
00189 s->max_seq= seq;
00190 if(s->probation==0) {
00191 rtp_init_sequence(s, seq);
00192 s->received++;
00193 return 1;
00194 }
00195 } else {
00196 s->probation= MIN_SEQUENTIAL - 1;
00197 s->max_seq = seq;
00198 }
00199 } else if (udelta < MAX_DROPOUT) {
00200
00201 if(seq < s->max_seq) {
00202
00203 s->cycles += RTP_SEQ_MOD;
00204 }
00205 s->max_seq= seq;
00206 } else if (udelta <= RTP_SEQ_MOD - MAX_MISORDER) {
00207
00208 if(seq==s->bad_seq) {
00209
00210 rtp_init_sequence(s, seq);
00211 } else {
00212 s->bad_seq= (seq + 1) & (RTP_SEQ_MOD-1);
00213 return 0;
00214 }
00215 } else {
00216
00217 }
00218 s->received++;
00219 return 1;
00220 }
00221
00222 #if 0
00223
00228 static void rtcp_update_jitter(RTPStatistics *s, uint32_t sent_timestamp, uint32_t arrival_timestamp)
00229 {
00230 uint32_t transit= arrival_timestamp - sent_timestamp;
00231 int d;
00232 s->transit= transit;
00233 d= FFABS(transit - s->transit);
00234 s->jitter += d - ((s->jitter + 8)>>4);
00235 }
00236 #endif
00237
00238 int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count)
00239 {
00240 AVIOContext *pb;
00241 uint8_t *buf;
00242 int len;
00243 int rtcp_bytes;
00244 RTPStatistics *stats= &s->statistics;
00245 uint32_t lost;
00246 uint32_t extended_max;
00247 uint32_t expected_interval;
00248 uint32_t received_interval;
00249 uint32_t lost_interval;
00250 uint32_t expected;
00251 uint32_t fraction;
00252 uint64_t ntp_time= s->last_rtcp_ntp_time;
00253
00254 if (!s->rtp_ctx || (count < 1))
00255 return -1;
00256
00257
00258
00259 s->octet_count += count;
00260 rtcp_bytes = ((s->octet_count - s->last_octet_count) * RTCP_TX_RATIO_NUM) /
00261 RTCP_TX_RATIO_DEN;
00262 rtcp_bytes /= 50;
00263 if (rtcp_bytes < 28)
00264 return -1;
00265 s->last_octet_count = s->octet_count;
00266
00267 if (url_open_dyn_buf(&pb) < 0)
00268 return -1;
00269
00270
00271 avio_w8(pb, (RTP_VERSION << 6) + 1);
00272 avio_w8(pb, RTCP_RR);
00273 avio_wb16(pb, 7);
00274
00275 avio_wb32(pb, s->ssrc + 1);
00276 avio_wb32(pb, s->ssrc);
00277
00278
00279 extended_max= stats->cycles + stats->max_seq;
00280 expected= extended_max - stats->base_seq + 1;
00281 lost= expected - stats->received;
00282 lost= FFMIN(lost, 0xffffff);
00283 expected_interval= expected - stats->expected_prior;
00284 stats->expected_prior= expected;
00285 received_interval= stats->received - stats->received_prior;
00286 stats->received_prior= stats->received;
00287 lost_interval= expected_interval - received_interval;
00288 if (expected_interval==0 || lost_interval<=0) fraction= 0;
00289 else fraction = (lost_interval<<8)/expected_interval;
00290
00291 fraction= (fraction<<24) | lost;
00292
00293 avio_wb32(pb, fraction);
00294 avio_wb32(pb, extended_max);
00295 avio_wb32(pb, stats->jitter>>4);
00296
00297 if(s->last_rtcp_ntp_time==AV_NOPTS_VALUE)
00298 {
00299 avio_wb32(pb, 0);
00300 avio_wb32(pb, 0);
00301 } else {
00302 uint32_t middle_32_bits= s->last_rtcp_ntp_time>>16;
00303 uint32_t delay_since_last= ntp_time - s->last_rtcp_ntp_time;
00304
00305 avio_wb32(pb, middle_32_bits);
00306 avio_wb32(pb, delay_since_last);
00307 }
00308
00309
00310 avio_w8(pb, (RTP_VERSION << 6) + 1);
00311 avio_w8(pb, RTCP_SDES);
00312 len = strlen(s->hostname);
00313 avio_wb16(pb, (6 + len + 3) / 4);
00314 avio_wb32(pb, s->ssrc);
00315 avio_w8(pb, 0x01);
00316 avio_w8(pb, len);
00317 avio_write(pb, s->hostname, len);
00318
00319 for (len = (6 + len) % 4; len % 4; len++) {
00320 avio_w8(pb, 0);
00321 }
00322
00323 put_flush_packet(pb);
00324 len = url_close_dyn_buf(pb, &buf);
00325 if ((len > 0) && buf) {
00326 int result;
00327 av_dlog(s->ic, "sending %d bytes of RR\n", len);
00328 result= url_write(s->rtp_ctx, buf, len);
00329 av_dlog(s->ic, "result from url_write: %d\n", result);
00330 av_free(buf);
00331 }
00332 return 0;
00333 }
00334
00335 void rtp_send_punch_packets(URLContext* rtp_handle)
00336 {
00337 AVIOContext *pb;
00338 uint8_t *buf;
00339 int len;
00340
00341
00342 if (url_open_dyn_buf(&pb) < 0)
00343 return;
00344
00345 avio_w8(pb, (RTP_VERSION << 6));
00346 avio_w8(pb, 0);
00347 avio_wb16(pb, 0);
00348 avio_wb32(pb, 0);
00349 avio_wb32(pb, 0);
00350
00351 put_flush_packet(pb);
00352 len = url_close_dyn_buf(pb, &buf);
00353 if ((len > 0) && buf)
00354 url_write(rtp_handle, buf, len);
00355 av_free(buf);
00356
00357
00358 if (url_open_dyn_buf(&pb) < 0)
00359 return;
00360
00361 avio_w8(pb, (RTP_VERSION << 6));
00362 avio_w8(pb, RTCP_RR);
00363 avio_wb16(pb, 1);
00364 avio_wb32(pb, 0);
00365
00366 put_flush_packet(pb);
00367 len = url_close_dyn_buf(pb, &buf);
00368 if ((len > 0) && buf)
00369 url_write(rtp_handle, buf, len);
00370 av_free(buf);
00371 }
00372
00373
00379 RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, int queue_size)
00380 {
00381 RTPDemuxContext *s;
00382
00383 s = av_mallocz(sizeof(RTPDemuxContext));
00384 if (!s)
00385 return NULL;
00386 s->payload_type = payload_type;
00387 s->last_rtcp_ntp_time = AV_NOPTS_VALUE;
00388 s->first_rtcp_ntp_time = AV_NOPTS_VALUE;
00389 s->ic = s1;
00390 s->st = st;
00391 s->queue_size = queue_size;
00392 rtp_init_statistics(&s->statistics, 0);
00393 if (!strcmp(ff_rtp_enc_name(payload_type), "MP2T")) {
00394 s->ts = ff_mpegts_parse_open(s->ic);
00395 if (s->ts == NULL) {
00396 av_free(s);
00397 return NULL;
00398 }
00399 } else {
00400 switch(st->codec->codec_id) {
00401 case CODEC_ID_MPEG1VIDEO:
00402 case CODEC_ID_MPEG2VIDEO:
00403 case CODEC_ID_MP2:
00404 case CODEC_ID_MP3:
00405 case CODEC_ID_MPEG4:
00406 case CODEC_ID_H263:
00407 case CODEC_ID_H264:
00408 st->need_parsing = AVSTREAM_PARSE_FULL;
00409 break;
00410 case CODEC_ID_ADPCM_G722:
00411
00412
00413 if (st->codec->sample_rate == 8000)
00414 st->codec->sample_rate = 16000;
00415 break;
00416 default:
00417 break;
00418 }
00419 }
00420
00421 s->rtp_ctx = rtpc;
00422 gethostname(s->hostname, sizeof(s->hostname));
00423 return s;
00424 }
00425
00426 void
00427 rtp_parse_set_dynamic_protocol(RTPDemuxContext *s, PayloadContext *ctx,
00428 RTPDynamicProtocolHandler *handler)
00429 {
00430 s->dynamic_protocol_context = ctx;
00431 s->parse_packet = handler->parse_packet;
00432 }
00433
00437 static void finalize_packet(RTPDemuxContext *s, AVPacket *pkt, uint32_t timestamp)
00438 {
00439 if (pkt->pts != AV_NOPTS_VALUE || pkt->dts != AV_NOPTS_VALUE)
00440 return;
00441 if (s->last_rtcp_ntp_time != AV_NOPTS_VALUE && timestamp != RTP_NOTS_VALUE) {
00442 int64_t addend;
00443 int delta_timestamp;
00444
00445
00446 delta_timestamp = timestamp - s->last_rtcp_timestamp;
00447
00448 addend = av_rescale(s->last_rtcp_ntp_time - s->first_rtcp_ntp_time, s->st->time_base.den, (uint64_t)s->st->time_base.num << 32);
00449 pkt->pts = s->range_start_offset + s->rtcp_ts_offset + addend +
00450 delta_timestamp;
00451 return;
00452 }
00453 if (timestamp == RTP_NOTS_VALUE)
00454 return;
00455 if (!s->base_timestamp)
00456 s->base_timestamp = timestamp;
00457 pkt->pts = s->range_start_offset + timestamp - s->base_timestamp;
00458 }
00459
00460 static int rtp_parse_packet_internal(RTPDemuxContext *s, AVPacket *pkt,
00461 const uint8_t *buf, int len)
00462 {
00463 unsigned int ssrc, h;
00464 int payload_type, seq, ret, flags = 0;
00465 int ext;
00466 AVStream *st;
00467 uint32_t timestamp;
00468 int rv= 0;
00469
00470 ext = buf[0] & 0x10;
00471 payload_type = buf[1] & 0x7f;
00472 if (buf[1] & 0x80)
00473 flags |= RTP_FLAG_MARKER;
00474 seq = AV_RB16(buf + 2);
00475 timestamp = AV_RB32(buf + 4);
00476 ssrc = AV_RB32(buf + 8);
00477
00478 s->ssrc = ssrc;
00479
00480
00481 if (s->payload_type != payload_type)
00482 return -1;
00483
00484 st = s->st;
00485
00486 if(!rtp_valid_packet_in_sequence(&s->statistics, seq))
00487 {
00488 av_log(st?st->codec:NULL, AV_LOG_ERROR, "RTP: PT=%02x: bad cseq %04x expected=%04x\n",
00489 payload_type, seq, ((s->seq + 1) & 0xffff));
00490 return -1;
00491 }
00492
00493 if (buf[0] & 0x20) {
00494 int padding = buf[len - 1];
00495 if (len >= 12 + padding)
00496 len -= padding;
00497 }
00498
00499 s->seq = seq;
00500 len -= 12;
00501 buf += 12;
00502
00503
00504 if (ext) {
00505 if (len < 4)
00506 return -1;
00507
00508
00509 ext = (AV_RB16(buf + 2) + 1) << 2;
00510
00511 if (len < ext)
00512 return -1;
00513
00514 len -= ext;
00515 buf += ext;
00516 }
00517
00518 if (!st) {
00519
00520 ret = ff_mpegts_parse_packet(s->ts, pkt, buf, len);
00521
00522
00523
00524 if (ret < 0)
00525 return AVERROR(EAGAIN);
00526 if (ret < len) {
00527 s->read_buf_size = len - ret;
00528 memcpy(s->buf, buf + ret, s->read_buf_size);
00529 s->read_buf_index = 0;
00530 return 1;
00531 }
00532 return 0;
00533 } else if (s->parse_packet) {
00534 rv = s->parse_packet(s->ic, s->dynamic_protocol_context,
00535 s->st, pkt, ×tamp, buf, len, flags);
00536 } else {
00537
00538 switch(st->codec->codec_id) {
00539 case CODEC_ID_MP2:
00540 case CODEC_ID_MP3:
00541
00542 if (len <= 4)
00543 return -1;
00544 h = AV_RB32(buf);
00545 len -= 4;
00546 buf += 4;
00547 av_new_packet(pkt, len);
00548 memcpy(pkt->data, buf, len);
00549 break;
00550 case CODEC_ID_MPEG1VIDEO:
00551 case CODEC_ID_MPEG2VIDEO:
00552
00553 if (len <= 4)
00554 return -1;
00555 h = AV_RB32(buf);
00556 buf += 4;
00557 len -= 4;
00558 if (h & (1 << 26)) {
00559
00560 if (len <= 4)
00561 return -1;
00562 buf += 4;
00563 len -= 4;
00564 }
00565 av_new_packet(pkt, len);
00566 memcpy(pkt->data, buf, len);
00567 break;
00568 default:
00569 av_new_packet(pkt, len);
00570 memcpy(pkt->data, buf, len);
00571 break;
00572 }
00573
00574 pkt->stream_index = st->index;
00575 }
00576
00577
00578 finalize_packet(s, pkt, timestamp);
00579
00580 return rv;
00581 }
00582
00583 void ff_rtp_reset_packet_queue(RTPDemuxContext *s)
00584 {
00585 while (s->queue) {
00586 RTPPacket *next = s->queue->next;
00587 av_free(s->queue->buf);
00588 av_free(s->queue);
00589 s->queue = next;
00590 }
00591 s->seq = 0;
00592 s->queue_len = 0;
00593 s->prev_ret = 0;
00594 }
00595
00596 static void enqueue_packet(RTPDemuxContext *s, uint8_t *buf, int len)
00597 {
00598 uint16_t seq = AV_RB16(buf + 2);
00599 RTPPacket *cur = s->queue, *prev = NULL, *packet;
00600
00601
00602 while (cur) {
00603 int16_t diff = seq - cur->seq;
00604 if (diff < 0)
00605 break;
00606 prev = cur;
00607 cur = cur->next;
00608 }
00609
00610 packet = av_mallocz(sizeof(*packet));
00611 if (!packet)
00612 return;
00613 packet->recvtime = av_gettime();
00614 packet->seq = seq;
00615 packet->len = len;
00616 packet->buf = buf;
00617 packet->next = cur;
00618 if (prev)
00619 prev->next = packet;
00620 else
00621 s->queue = packet;
00622 s->queue_len++;
00623 }
00624
00625 static int has_next_packet(RTPDemuxContext *s)
00626 {
00627 return s->queue && s->queue->seq == (uint16_t) (s->seq + 1);
00628 }
00629
00630 int64_t ff_rtp_queued_packet_time(RTPDemuxContext *s)
00631 {
00632 return s->queue ? s->queue->recvtime : 0;
00633 }
00634
00635 static int rtp_parse_queued_packet(RTPDemuxContext *s, AVPacket *pkt)
00636 {
00637 int rv;
00638 RTPPacket *next;
00639
00640 if (s->queue_len <= 0)
00641 return -1;
00642
00643 if (!has_next_packet(s))
00644 av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
00645 "RTP: missed %d packets\n", s->queue->seq - s->seq - 1);
00646
00647
00648 rv = rtp_parse_packet_internal(s, pkt, s->queue->buf, s->queue->len);
00649 next = s->queue->next;
00650 av_free(s->queue->buf);
00651 av_free(s->queue);
00652 s->queue = next;
00653 s->queue_len--;
00654 return rv;
00655 }
00656
00657 static int rtp_parse_one_packet(RTPDemuxContext *s, AVPacket *pkt,
00658 uint8_t **bufptr, int len)
00659 {
00660 uint8_t* buf = bufptr ? *bufptr : NULL;
00661 int ret, flags = 0;
00662 uint32_t timestamp;
00663 int rv= 0;
00664
00665 if (!buf) {
00666
00667
00668
00669 if (s->prev_ret <= 0)
00670 return rtp_parse_queued_packet(s, pkt);
00671
00672 if(s->st && s->parse_packet) {
00673
00674
00675 timestamp = RTP_NOTS_VALUE;
00676 rv= s->parse_packet(s->ic, s->dynamic_protocol_context,
00677 s->st, pkt, ×tamp, NULL, 0, flags);
00678 finalize_packet(s, pkt, timestamp);
00679 return rv;
00680 } else {
00681
00682 if (s->read_buf_index >= s->read_buf_size)
00683 return AVERROR(EAGAIN);
00684 ret = ff_mpegts_parse_packet(s->ts, pkt, s->buf + s->read_buf_index,
00685 s->read_buf_size - s->read_buf_index);
00686 if (ret < 0)
00687 return AVERROR(EAGAIN);
00688 s->read_buf_index += ret;
00689 if (s->read_buf_index < s->read_buf_size)
00690 return 1;
00691 else
00692 return 0;
00693 }
00694 }
00695
00696 if (len < 12)
00697 return -1;
00698
00699 if ((buf[0] & 0xc0) != (RTP_VERSION << 6))
00700 return -1;
00701 if (buf[1] >= RTCP_SR && buf[1] <= RTCP_APP) {
00702 return rtcp_parse_packet(s, buf, len);
00703 }
00704
00705 if ((s->seq == 0 && !s->queue) || s->queue_size <= 1) {
00706
00707 return rtp_parse_packet_internal(s, pkt, buf, len);
00708 } else {
00709 uint16_t seq = AV_RB16(buf + 2);
00710 int16_t diff = seq - s->seq;
00711 if (diff < 0) {
00712
00713 av_log(s->st ? s->st->codec : NULL, AV_LOG_WARNING,
00714 "RTP: dropping old packet received too late\n");
00715 return -1;
00716 } else if (diff <= 1) {
00717
00718 rv = rtp_parse_packet_internal(s, pkt, buf, len);
00719 return rv;
00720 } else {
00721
00722 enqueue_packet(s, buf, len);
00723 *bufptr = NULL;
00724
00725
00726 if (s->queue_len >= s->queue_size)
00727 return rtp_parse_queued_packet(s, pkt);
00728 return -1;
00729 }
00730 }
00731 }
00732
00742 int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
00743 uint8_t **bufptr, int len)
00744 {
00745 int rv = rtp_parse_one_packet(s, pkt, bufptr, len);
00746 s->prev_ret = rv;
00747 while (rv == AVERROR(EAGAIN) && has_next_packet(s))
00748 rv = rtp_parse_queued_packet(s, pkt);
00749 return rv ? rv : has_next_packet(s);
00750 }
00751
00752 void rtp_parse_close(RTPDemuxContext *s)
00753 {
00754 ff_rtp_reset_packet_queue(s);
00755 if (!strcmp(ff_rtp_enc_name(s->payload_type), "MP2T")) {
00756 ff_mpegts_parse_close(s->ts);
00757 }
00758 av_free(s);
00759 }
00760
00761 int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
00762 int (*parse_fmtp)(AVStream *stream,
00763 PayloadContext *data,
00764 char *attr, char *value))
00765 {
00766 char attr[256];
00767 char *value;
00768 int res;
00769 int value_size = strlen(p) + 1;
00770
00771 if (!(value = av_malloc(value_size))) {
00772 av_log(stream, AV_LOG_ERROR, "Failed to allocate data for FMTP.");
00773 return AVERROR(ENOMEM);
00774 }
00775
00776
00777 while (*p && *p == ' ') p++;
00778 while (*p && *p != ' ') p++;
00779 while (*p && *p == ' ') p++;
00780
00781 while (ff_rtsp_next_attr_and_value(&p,
00782 attr, sizeof(attr),
00783 value, value_size)) {
00784
00785 res = parse_fmtp(stream, data, attr, value);
00786 if (res < 0 && res != AVERROR_PATCHWELCOME) {
00787 av_free(value);
00788 return res;
00789 }
00790 }
00791 av_free(value);
00792 return 0;
00793 }