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1
/*
2
 * RTSP/SDP client
3
 * Copyright (c) 2002 Fabrice Bellard
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
21

    
22
#include "libavutil/base64.h"
23
#include "libavutil/avstring.h"
24
#include "libavutil/intreadwrite.h"
25
#include "libavutil/random_seed.h"
26
#include "avformat.h"
27

    
28
#include <sys/time.h>
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#if HAVE_SYS_SELECT_H
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#include <sys/select.h>
31
#endif
32
#include <strings.h>
33
#include "internal.h"
34
#include "network.h"
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#include "os_support.h"
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#include "http.h"
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#include "rtsp.h"
38

    
39
#include "rtpdec.h"
40
#include "rdt.h"
41
#include "rtpdec_formats.h"
42
#include "rtpenc_chain.h"
43

    
44
//#define DEBUG
45
//#define DEBUG_RTP_TCP
46

    
47
/* Timeout values for socket select, in ms,
48
 * and read_packet(), in seconds  */
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#define SELECT_TIMEOUT_MS 100
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#define READ_PACKET_TIMEOUT_S 10
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#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
52
#define SDP_MAX_SIZE 16384
53
#define RECVBUF_SIZE 10 * RTP_MAX_PACKET_LENGTH
54

    
55
static void get_word_until_chars(char *buf, int buf_size,
56
                                 const char *sep, const char **pp)
57
{
58
    const char *p;
59
    char *q;
60

    
61
    p = *pp;
62
    p += strspn(p, SPACE_CHARS);
63
    q = buf;
64
    while (!strchr(sep, *p) && *p != '\0') {
65
        if ((q - buf) < buf_size - 1)
66
            *q++ = *p;
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        p++;
68
    }
69
    if (buf_size > 0)
70
        *q = '\0';
71
    *pp = p;
72
}
73

    
74
static void get_word_sep(char *buf, int buf_size, const char *sep,
75
                         const char **pp)
76
{
77
    if (**pp == '/') (*pp)++;
78
    get_word_until_chars(buf, buf_size, sep, pp);
79
}
80

    
81
static void get_word(char *buf, int buf_size, const char **pp)
82
{
83
    get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
84
}
85

    
86
/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
87
 *  and end time.
88
 *  Used for seeking in the rtp stream.
89
 */
90
static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
91
{
92
    char buf[256];
93

    
94
    p += strspn(p, SPACE_CHARS);
95
    if (!av_stristart(p, "npt=", &p))
96
        return;
97

    
98
    *start = AV_NOPTS_VALUE;
99
    *end = AV_NOPTS_VALUE;
100

    
101
    get_word_sep(buf, sizeof(buf), "-", &p);
102
    *start = parse_date(buf, 1);
103
    if (*p == '-') {
104
        p++;
105
        get_word_sep(buf, sizeof(buf), "-", &p);
106
        *end = parse_date(buf, 1);
107
    }
108
//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
109
//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
110
}
111

    
112
static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
113
{
114
    struct addrinfo hints, *ai = NULL;
115
    memset(&hints, 0, sizeof(hints));
116
    hints.ai_flags = AI_NUMERICHOST;
117
    if (getaddrinfo(buf, NULL, &hints, &ai))
118
        return -1;
119
    memcpy(sock, ai->ai_addr, FFMIN(sizeof(*sock), ai->ai_addrlen));
120
    freeaddrinfo(ai);
121
    return 0;
122
}
123

    
124
#if CONFIG_RTPDEC
125
static void init_rtp_handler(RTPDynamicProtocolHandler *handler,
126
                             RTSPStream *rtsp_st, AVCodecContext *codec)
127
{
128
    if (!handler)
129
        return;
130
    codec->codec_id          = handler->codec_id;
131
    rtsp_st->dynamic_handler = handler;
132
    if (handler->open)
133
        rtsp_st->dynamic_protocol_context = handler->open();
134
}
135

    
136
/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
137
static int sdp_parse_rtpmap(AVFormatContext *s,
138
                            AVStream *st, RTSPStream *rtsp_st,
139
                            int payload_type, const char *p)
140
{
141
    AVCodecContext *codec = st->codec;
142
    char buf[256];
143
    int i;
144
    AVCodec *c;
145
    const char *c_name;
146

    
147
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
148
     * see if we can handle this kind of payload.
149
     * The space should normally not be there but some Real streams or
150
     * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
151
     * have a trailing space. */
152
    get_word_sep(buf, sizeof(buf), "/ ", &p);
153
    if (payload_type >= RTP_PT_PRIVATE) {
154
        RTPDynamicProtocolHandler *handler =
155
            ff_rtp_handler_find_by_name(buf, codec->codec_type);
156
        init_rtp_handler(handler, rtsp_st, codec);
157
        /* If no dynamic handler was found, check with the list of standard
158
         * allocated types, if such a stream for some reason happens to
159
         * use a private payload type. This isn't handled in rtpdec.c, since
160
         * the format name from the rtpmap line never is passed into rtpdec. */
161
        if (!rtsp_st->dynamic_handler)
162
            codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
163
    } else {
164
        /* We are in a standard case
165
         * (from http://www.iana.org/assignments/rtp-parameters). */
166
        /* search into AVRtpPayloadTypes[] */
167
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
168
    }
169

    
170
    c = avcodec_find_decoder(codec->codec_id);
171
    if (c && c->name)
172
        c_name = c->name;
173
    else
174
        c_name = "(null)";
175

    
176
    get_word_sep(buf, sizeof(buf), "/", &p);
177
    i = atoi(buf);
178
    switch (codec->codec_type) {
179
    case AVMEDIA_TYPE_AUDIO:
180
        av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
181
        codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
182
        codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
183
        if (i > 0) {
184
            codec->sample_rate = i;
185
            av_set_pts_info(st, 32, 1, codec->sample_rate);
186
            get_word_sep(buf, sizeof(buf), "/", &p);
187
            i = atoi(buf);
188
            if (i > 0)
189
                codec->channels = i;
190
            // TODO: there is a bug here; if it is a mono stream, and
191
            // less than 22000Hz, faad upconverts to stereo and twice
192
            // the frequency.  No problem, but the sample rate is being
193
            // set here by the sdp line. Patch on its way. (rdm)
194
        }
195
        av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
196
               codec->sample_rate);
197
        av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
198
               codec->channels);
199
        break;
200
    case AVMEDIA_TYPE_VIDEO:
201
        av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
202
        if (i > 0)
203
            av_set_pts_info(st, 32, 1, i);
204
        break;
205
    default:
206
        break;
207
    }
208
    return 0;
209
}
210

    
211
/* parse the attribute line from the fmtp a line of an sdp response. This
212
 * is broken out as a function because it is used in rtp_h264.c, which is
213
 * forthcoming. */
214
int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
215
                                char *value, int value_size)
216
{
217
    *p += strspn(*p, SPACE_CHARS);
218
    if (**p) {
219
        get_word_sep(attr, attr_size, "=", p);
220
        if (**p == '=')
221
            (*p)++;
222
        get_word_sep(value, value_size, ";", p);
223
        if (**p == ';')
224
            (*p)++;
225
        return 1;
226
    }
227
    return 0;
228
}
229

    
230
typedef struct SDPParseState {
231
    /* SDP only */
232
    struct sockaddr_storage default_ip;
233
    int            default_ttl;
234
    int            skip_media;  ///< set if an unknown m= line occurs
235
} SDPParseState;
236

    
237
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
238
                           int letter, const char *buf)
239
{
240
    RTSPState *rt = s->priv_data;
241
    char buf1[64], st_type[64];
242
    const char *p;
243
    enum AVMediaType codec_type;
244
    int payload_type, i;
245
    AVStream *st;
246
    RTSPStream *rtsp_st;
247
    struct sockaddr_storage sdp_ip;
248
    int ttl;
249

    
250
    dprintf(s, "sdp: %c='%s'\n", letter, buf);
251

    
252
    p = buf;
253
    if (s1->skip_media && letter != 'm')
254
        return;
255
    switch (letter) {
256
    case 'c':
257
        get_word(buf1, sizeof(buf1), &p);
258
        if (strcmp(buf1, "IN") != 0)
259
            return;
260
        get_word(buf1, sizeof(buf1), &p);
261
        if (strcmp(buf1, "IP4") && strcmp(buf1, "IP6"))
262
            return;
263
        get_word_sep(buf1, sizeof(buf1), "/", &p);
264
        if (get_sockaddr(buf1, &sdp_ip))
265
            return;
266
        ttl = 16;
267
        if (*p == '/') {
268
            p++;
269
            get_word_sep(buf1, sizeof(buf1), "/", &p);
270
            ttl = atoi(buf1);
271
        }
272
        if (s->nb_streams == 0) {
273
            s1->default_ip = sdp_ip;
274
            s1->default_ttl = ttl;
275
        } else {
276
            st = s->streams[s->nb_streams - 1];
277
            rtsp_st = st->priv_data;
278
            rtsp_st->sdp_ip = sdp_ip;
279
            rtsp_st->sdp_ttl = ttl;
280
        }
281
        break;
282
    case 's':
283
        av_metadata_set2(&s->metadata, "title", p, 0);
284
        break;
285
    case 'i':
286
        if (s->nb_streams == 0) {
287
            av_metadata_set2(&s->metadata, "comment", p, 0);
288
            break;
289
        }
290
        break;
291
    case 'm':
292
        /* new stream */
293
        s1->skip_media = 0;
294
        get_word(st_type, sizeof(st_type), &p);
295
        if (!strcmp(st_type, "audio")) {
296
            codec_type = AVMEDIA_TYPE_AUDIO;
297
        } else if (!strcmp(st_type, "video")) {
298
            codec_type = AVMEDIA_TYPE_VIDEO;
299
        } else if (!strcmp(st_type, "application")) {
300
            codec_type = AVMEDIA_TYPE_DATA;
301
        } else {
302
            s1->skip_media = 1;
303
            return;
304
        }
305
        rtsp_st = av_mallocz(sizeof(RTSPStream));
306
        if (!rtsp_st)
307
            return;
308
        rtsp_st->stream_index = -1;
309
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
310

    
311
        rtsp_st->sdp_ip = s1->default_ip;
312
        rtsp_st->sdp_ttl = s1->default_ttl;
313

    
314
        get_word(buf1, sizeof(buf1), &p); /* port */
315
        rtsp_st->sdp_port = atoi(buf1);
316

    
317
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
318

    
319
        /* XXX: handle list of formats */
320
        get_word(buf1, sizeof(buf1), &p); /* format list */
321
        rtsp_st->sdp_payload_type = atoi(buf1);
322

    
323
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
324
            /* no corresponding stream */
325
        } else {
326
            st = av_new_stream(s, 0);
327
            if (!st)
328
                return;
329
            st->priv_data = rtsp_st;
330
            rtsp_st->stream_index = st->index;
331
            st->codec->codec_type = codec_type;
332
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
333
                RTPDynamicProtocolHandler *handler;
334
                /* if standard payload type, we can find the codec right now */
335
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
336
                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
337
                    st->codec->sample_rate > 0)
338
                    av_set_pts_info(st, 32, 1, st->codec->sample_rate);
339
                /* Even static payload types may need a custom depacketizer */
340
                handler = ff_rtp_handler_find_by_id(
341
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
342
                init_rtp_handler(handler, rtsp_st, st->codec);
343
            }
344
        }
345
        /* put a default control url */
346
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
347
                   sizeof(rtsp_st->control_url));
348
        break;
349
    case 'a':
350
        if (av_strstart(p, "control:", &p)) {
351
            if (s->nb_streams == 0) {
352
                if (!strncmp(p, "rtsp://", 7))
353
                    av_strlcpy(rt->control_uri, p,
354
                               sizeof(rt->control_uri));
355
            } else {
356
                char proto[32];
357
                /* get the control url */
358
                st = s->streams[s->nb_streams - 1];
359
                rtsp_st = st->priv_data;
360

    
361
                /* XXX: may need to add full url resolution */
362
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
363
                             NULL, NULL, 0, p);
364
                if (proto[0] == '\0') {
365
                    /* relative control URL */
366
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
367
                    av_strlcat(rtsp_st->control_url, "/",
368
                               sizeof(rtsp_st->control_url));
369
                    av_strlcat(rtsp_st->control_url, p,
370
                               sizeof(rtsp_st->control_url));
371
                } else
372
                    av_strlcpy(rtsp_st->control_url, p,
373
                               sizeof(rtsp_st->control_url));
374
            }
375
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
376
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
377
            get_word(buf1, sizeof(buf1), &p);
378
            payload_type = atoi(buf1);
379
            st = s->streams[s->nb_streams - 1];
380
            rtsp_st = st->priv_data;
381
            sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
382
        } else if (av_strstart(p, "fmtp:", &p) ||
383
                   av_strstart(p, "framesize:", &p)) {
384
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
385
            // let dynamic protocol handlers have a stab at the line.
386
            get_word(buf1, sizeof(buf1), &p);
387
            payload_type = atoi(buf1);
388
            for (i = 0; i < s->nb_streams; i++) {
389
                st      = s->streams[i];
390
                rtsp_st = st->priv_data;
391
                if (rtsp_st->sdp_payload_type == payload_type &&
392
                    rtsp_st->dynamic_handler &&
393
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
394
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
395
                        rtsp_st->dynamic_protocol_context, buf);
396
            }
397
        } else if (av_strstart(p, "range:", &p)) {
398
            int64_t start, end;
399

    
400
            // this is so that seeking on a streamed file can work.
401
            rtsp_parse_range_npt(p, &start, &end);
402
            s->start_time = start;
403
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
404
            s->duration   = (end == AV_NOPTS_VALUE) ?
405
                            AV_NOPTS_VALUE : end - start;
406
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
407
            if (atoi(p) == 1)
408
                rt->transport = RTSP_TRANSPORT_RDT;
409
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
410
                   s->nb_streams > 0) {
411
            st = s->streams[s->nb_streams - 1];
412
            st->codec->sample_rate = atoi(p);
413
        } else {
414
            if (rt->server_type == RTSP_SERVER_WMS)
415
                ff_wms_parse_sdp_a_line(s, p);
416
            if (s->nb_streams > 0) {
417
                if (rt->server_type == RTSP_SERVER_REAL)
418
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
419

    
420
                rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
421
                if (rtsp_st->dynamic_handler &&
422
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
423
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
424
                        s->nb_streams - 1,
425
                        rtsp_st->dynamic_protocol_context, buf);
426
            }
427
        }
428
        break;
429
    }
430
}
431

    
432
int ff_sdp_parse(AVFormatContext *s, const char *content)
433
{
434
    const char *p;
435
    int letter;
436
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
437
     * contain long SDP lines containing complete ASF Headers (several
438
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
439
     * "rulebooks" describing their properties. Therefore, the SDP line
440
     * buffer is large.
441
     *
442
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
443
     * in rtpdec_xiph.c. */
444
    char buf[16384], *q;
445
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
446

    
447
    memset(s1, 0, sizeof(SDPParseState));
448
    p = content;
449
    for (;;) {
450
        p += strspn(p, SPACE_CHARS);
451
        letter = *p;
452
        if (letter == '\0')
453
            break;
454
        p++;
455
        if (*p != '=')
456
            goto next_line;
457
        p++;
458
        /* get the content */
459
        q = buf;
460
        while (*p != '\n' && *p != '\r' && *p != '\0') {
461
            if ((q - buf) < sizeof(buf) - 1)
462
                *q++ = *p;
463
            p++;
464
        }
465
        *q = '\0';
466
        sdp_parse_line(s, s1, letter, buf);
467
    next_line:
468
        while (*p != '\n' && *p != '\0')
469
            p++;
470
        if (*p == '\n')
471
            p++;
472
    }
473
    return 0;
474
}
475
#endif /* CONFIG_RTPDEC */
476

    
477
void ff_rtsp_undo_setup(AVFormatContext *s)
478
{
479
    RTSPState *rt = s->priv_data;
480
    int i;
481

    
482
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
483
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
484
        if (!rtsp_st)
485
            continue;
486
        if (rtsp_st->transport_priv) {
487
            if (s->oformat) {
488
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
489
                av_write_trailer(rtpctx);
490
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
491
                    uint8_t *ptr;
492
                    url_close_dyn_buf(rtpctx->pb, &ptr);
493
                    av_free(ptr);
494
                } else {
495
                    url_fclose(rtpctx->pb);
496
                }
497
                av_metadata_free(&rtpctx->streams[0]->metadata);
498
                av_metadata_free(&rtpctx->metadata);
499
                av_free(rtpctx->streams[0]);
500
                av_free(rtpctx);
501
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
502
                ff_rdt_parse_close(rtsp_st->transport_priv);
503
            else if (CONFIG_RTPDEC)
504
                rtp_parse_close(rtsp_st->transport_priv);
505
        }
506
        rtsp_st->transport_priv = NULL;
507
        if (rtsp_st->rtp_handle)
508
            url_close(rtsp_st->rtp_handle);
509
        rtsp_st->rtp_handle = NULL;
510
    }
511
}
512

    
513
/* close and free RTSP streams */
514
void ff_rtsp_close_streams(AVFormatContext *s)
515
{
516
    RTSPState *rt = s->priv_data;
517
    int i;
518
    RTSPStream *rtsp_st;
519

    
520
    ff_rtsp_undo_setup(s);
521
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
522
        rtsp_st = rt->rtsp_streams[i];
523
        if (rtsp_st) {
524
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
525
                rtsp_st->dynamic_handler->close(
526
                    rtsp_st->dynamic_protocol_context);
527
        }
528
    }
529
    av_free(rt->rtsp_streams);
530
    if (rt->asf_ctx) {
531
        av_close_input_stream (rt->asf_ctx);
532
        rt->asf_ctx = NULL;
533
    }
534
    av_free(rt->recvbuf);
535
}
536

    
537
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
538
{
539
    RTSPState *rt = s->priv_data;
540
    AVStream *st = NULL;
541

    
542
    /* open the RTP context */
543
    if (rtsp_st->stream_index >= 0)
544
        st = s->streams[rtsp_st->stream_index];
545
    if (!st)
546
        s->ctx_flags |= AVFMTCTX_NOHEADER;
547

    
548
    if (s->oformat && CONFIG_RTSP_MUXER) {
549
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
550
                                      rtsp_st->rtp_handle,
551
                                      RTSP_TCP_MAX_PACKET_SIZE);
552
        /* Ownership of rtp_handle is passed to the rtp mux context */
553
        rtsp_st->rtp_handle = NULL;
554
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
555
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
556
                                            rtsp_st->dynamic_protocol_context,
557
                                            rtsp_st->dynamic_handler);
558
    else if (CONFIG_RTPDEC)
559
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
560
                                         rtsp_st->sdp_payload_type,
561
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
562
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
563

    
564
    if (!rtsp_st->transport_priv) {
565
         return AVERROR(ENOMEM);
566
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
567
        if (rtsp_st->dynamic_handler) {
568
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
569
                                           rtsp_st->dynamic_protocol_context,
570
                                           rtsp_st->dynamic_handler);
571
        }
572
    }
573

    
574
    return 0;
575
}
576

    
577
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
578
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
579
{
580
    const char *p;
581
    int v;
582

    
583
    p = *pp;
584
    p += strspn(p, SPACE_CHARS);
585
    v = strtol(p, (char **)&p, 10);
586
    if (*p == '-') {
587
        p++;
588
        *min_ptr = v;
589
        v = strtol(p, (char **)&p, 10);
590
        *max_ptr = v;
591
    } else {
592
        *min_ptr = v;
593
        *max_ptr = v;
594
    }
595
    *pp = p;
596
}
597

    
598
/* XXX: only one transport specification is parsed */
599
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
600
{
601
    char transport_protocol[16];
602
    char profile[16];
603
    char lower_transport[16];
604
    char parameter[16];
605
    RTSPTransportField *th;
606
    char buf[256];
607

    
608
    reply->nb_transports = 0;
609

    
610
    for (;;) {
611
        p += strspn(p, SPACE_CHARS);
612
        if (*p == '\0')
613
            break;
614

    
615
        th = &reply->transports[reply->nb_transports];
616

    
617
        get_word_sep(transport_protocol, sizeof(transport_protocol),
618
                     "/", &p);
619
        if (!strcasecmp (transport_protocol, "rtp")) {
620
            get_word_sep(profile, sizeof(profile), "/;,", &p);
621
            lower_transport[0] = '\0';
622
            /* rtp/avp/<protocol> */
623
            if (*p == '/') {
624
                get_word_sep(lower_transport, sizeof(lower_transport),
625
                             ";,", &p);
626
            }
627
            th->transport = RTSP_TRANSPORT_RTP;
628
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
629
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
630
            /* x-pn-tng/<protocol> */
631
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
632
            profile[0] = '\0';
633
            th->transport = RTSP_TRANSPORT_RDT;
634
        }
635
        if (!strcasecmp(lower_transport, "TCP"))
636
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
637
        else
638
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
639

    
640
        if (*p == ';')
641
            p++;
642
        /* get each parameter */
643
        while (*p != '\0' && *p != ',') {
644
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
645
            if (!strcmp(parameter, "port")) {
646
                if (*p == '=') {
647
                    p++;
648
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
649
                }
650
            } else if (!strcmp(parameter, "client_port")) {
651
                if (*p == '=') {
652
                    p++;
653
                    rtsp_parse_range(&th->client_port_min,
654
                                     &th->client_port_max, &p);
655
                }
656
            } else if (!strcmp(parameter, "server_port")) {
657
                if (*p == '=') {
658
                    p++;
659
                    rtsp_parse_range(&th->server_port_min,
660
                                     &th->server_port_max, &p);
661
                }
662
            } else if (!strcmp(parameter, "interleaved")) {
663
                if (*p == '=') {
664
                    p++;
665
                    rtsp_parse_range(&th->interleaved_min,
666
                                     &th->interleaved_max, &p);
667
                }
668
            } else if (!strcmp(parameter, "multicast")) {
669
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
670
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
671
            } else if (!strcmp(parameter, "ttl")) {
672
                if (*p == '=') {
673
                    p++;
674
                    th->ttl = strtol(p, (char **)&p, 10);
675
                }
676
            } else if (!strcmp(parameter, "destination")) {
677
                if (*p == '=') {
678
                    p++;
679
                    get_word_sep(buf, sizeof(buf), ";,", &p);
680
                    get_sockaddr(buf, &th->destination);
681
                }
682
            } else if (!strcmp(parameter, "source")) {
683
                if (*p == '=') {
684
                    p++;
685
                    get_word_sep(buf, sizeof(buf), ";,", &p);
686
                    av_strlcpy(th->source, buf, sizeof(th->source));
687
                }
688
            }
689

    
690
            while (*p != ';' && *p != '\0' && *p != ',')
691
                p++;
692
            if (*p == ';')
693
                p++;
694
        }
695
        if (*p == ',')
696
            p++;
697

    
698
        reply->nb_transports++;
699
    }
700
}
701

    
702
static void handle_rtp_info(RTSPState *rt, const char *url,
703
                            uint32_t seq, uint32_t rtptime)
704
{
705
    int i;
706
    if (!rtptime || !url[0])
707
        return;
708
    if (rt->transport != RTSP_TRANSPORT_RTP)
709
        return;
710
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
711
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
712
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
713
        if (!rtpctx)
714
            continue;
715
        if (!strcmp(rtsp_st->control_url, url)) {
716
            rtpctx->base_timestamp = rtptime;
717
            break;
718
        }
719
    }
720
}
721

    
722
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
723
{
724
    int read = 0;
725
    char key[20], value[1024], url[1024] = "";
726
    uint32_t seq = 0, rtptime = 0;
727

    
728
    for (;;) {
729
        p += strspn(p, SPACE_CHARS);
730
        if (!*p)
731
            break;
732
        get_word_sep(key, sizeof(key), "=", &p);
733
        if (*p != '=')
734
            break;
735
        p++;
736
        get_word_sep(value, sizeof(value), ";, ", &p);
737
        read++;
738
        if (!strcmp(key, "url"))
739
            av_strlcpy(url, value, sizeof(url));
740
        else if (!strcmp(key, "seq"))
741
            seq = strtol(value, NULL, 10);
742
        else if (!strcmp(key, "rtptime"))
743
            rtptime = strtol(value, NULL, 10);
744
        if (*p == ',') {
745
            handle_rtp_info(rt, url, seq, rtptime);
746
            url[0] = '\0';
747
            seq = rtptime = 0;
748
            read = 0;
749
        }
750
        if (*p)
751
            p++;
752
    }
753
    if (read > 0)
754
        handle_rtp_info(rt, url, seq, rtptime);
755
}
756

    
757
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
758
                        RTSPState *rt, const char *method)
759
{
760
    const char *p;
761

    
762
    /* NOTE: we do case independent match for broken servers */
763
    p = buf;
764
    if (av_stristart(p, "Session:", &p)) {
765
        int t;
766
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
767
        if (av_stristart(p, ";timeout=", &p) &&
768
            (t = strtol(p, NULL, 10)) > 0) {
769
            reply->timeout = t;
770
        }
771
    } else if (av_stristart(p, "Content-Length:", &p)) {
772
        reply->content_length = strtol(p, NULL, 10);
773
    } else if (av_stristart(p, "Transport:", &p)) {
774
        rtsp_parse_transport(reply, p);
775
    } else if (av_stristart(p, "CSeq:", &p)) {
776
        reply->seq = strtol(p, NULL, 10);
777
    } else if (av_stristart(p, "Range:", &p)) {
778
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
779
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
780
        p += strspn(p, SPACE_CHARS);
781
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
782
    } else if (av_stristart(p, "Server:", &p)) {
783
        p += strspn(p, SPACE_CHARS);
784
        av_strlcpy(reply->server, p, sizeof(reply->server));
785
    } else if (av_stristart(p, "Notice:", &p) ||
786
               av_stristart(p, "X-Notice:", &p)) {
787
        reply->notice = strtol(p, NULL, 10);
788
    } else if (av_stristart(p, "Location:", &p)) {
789
        p += strspn(p, SPACE_CHARS);
790
        av_strlcpy(reply->location, p , sizeof(reply->location));
791
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
792
        p += strspn(p, SPACE_CHARS);
793
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
794
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
795
        p += strspn(p, SPACE_CHARS);
796
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
797
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
798
        p += strspn(p, SPACE_CHARS);
799
        if (method && !strcmp(method, "DESCRIBE"))
800
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
801
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
802
        p += strspn(p, SPACE_CHARS);
803
        if (method && !strcmp(method, "PLAY"))
804
            rtsp_parse_rtp_info(rt, p);
805
    }
806
}
807

    
808
/* skip a RTP/TCP interleaved packet */
809
void ff_rtsp_skip_packet(AVFormatContext *s)
810
{
811
    RTSPState *rt = s->priv_data;
812
    int ret, len, len1;
813
    uint8_t buf[1024];
814

    
815
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
816
    if (ret != 3)
817
        return;
818
    len = AV_RB16(buf + 1);
819

    
820
    dprintf(s, "skipping RTP packet len=%d\n", len);
821

    
822
    /* skip payload */
823
    while (len > 0) {
824
        len1 = len;
825
        if (len1 > sizeof(buf))
826
            len1 = sizeof(buf);
827
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
828
        if (ret != len1)
829
            return;
830
        len -= len1;
831
    }
832
}
833

    
834
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
835
                       unsigned char **content_ptr,
836
                       int return_on_interleaved_data, const char *method)
837
{
838
    RTSPState *rt = s->priv_data;
839
    char buf[4096], buf1[1024], *q;
840
    unsigned char ch;
841
    const char *p;
842
    int ret, content_length, line_count = 0;
843
    unsigned char *content = NULL;
844

    
845
    memset(reply, 0, sizeof(*reply));
846

    
847
    /* parse reply (XXX: use buffers) */
848
    rt->last_reply[0] = '\0';
849
    for (;;) {
850
        q = buf;
851
        for (;;) {
852
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
853
#ifdef DEBUG_RTP_TCP
854
            dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
855
#endif
856
            if (ret != 1)
857
                return AVERROR_EOF;
858
            if (ch == '\n')
859
                break;
860
            if (ch == '$') {
861
                /* XXX: only parse it if first char on line ? */
862
                if (return_on_interleaved_data) {
863
                    return 1;
864
                } else
865
                    ff_rtsp_skip_packet(s);
866
            } else if (ch != '\r') {
867
                if ((q - buf) < sizeof(buf) - 1)
868
                    *q++ = ch;
869
            }
870
        }
871
        *q = '\0';
872

    
873
        dprintf(s, "line='%s'\n", buf);
874

    
875
        /* test if last line */
876
        if (buf[0] == '\0')
877
            break;
878
        p = buf;
879
        if (line_count == 0) {
880
            /* get reply code */
881
            get_word(buf1, sizeof(buf1), &p);
882
            get_word(buf1, sizeof(buf1), &p);
883
            reply->status_code = atoi(buf1);
884
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
885
        } else {
886
            ff_rtsp_parse_line(reply, p, rt, method);
887
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
888
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
889
        }
890
        line_count++;
891
    }
892

    
893
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
894
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
895

    
896
    content_length = reply->content_length;
897
    if (content_length > 0) {
898
        /* leave some room for a trailing '\0' (useful for simple parsing) */
899
        content = av_malloc(content_length + 1);
900
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
901
        content[content_length] = '\0';
902
    }
903
    if (content_ptr)
904
        *content_ptr = content;
905
    else
906
        av_free(content);
907

    
908
    if (rt->seq != reply->seq) {
909
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
910
            rt->seq, reply->seq);
911
    }
912

    
913
    /* EOS */
914
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
915
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
916
        reply->notice == 2306 /* Continuous Feed Terminated */) {
917
        rt->state = RTSP_STATE_IDLE;
918
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
919
        return AVERROR(EIO); /* data or server error */
920
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
921
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
922
        return AVERROR(EPERM);
923

    
924
    return 0;
925
}
926

    
927
/**
928
 * Send a command to the RTSP server without waiting for the reply.
929
 *
930
 * @param s RTSP (de)muxer context
931
 * @param method the method for the request
932
 * @param url the target url for the request
933
 * @param headers extra header lines to include in the request
934
 * @param send_content if non-null, the data to send as request body content
935
 * @param send_content_length the length of the send_content data, or 0 if
936
 *                            send_content is null
937
 *
938
 * @return zero if success, nonzero otherwise
939
 */
940
static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
941
                                               const char *method, const char *url,
942
                                               const char *headers,
943
                                               const unsigned char *send_content,
944
                                               int send_content_length)
945
{
946
    RTSPState *rt = s->priv_data;
947
    char buf[4096], *out_buf;
948
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
949

    
950
    /* Add in RTSP headers */
951
    out_buf = buf;
952
    rt->seq++;
953
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
954
    if (headers)
955
        av_strlcat(buf, headers, sizeof(buf));
956
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
957
    if (rt->session_id[0] != '\0' && (!headers ||
958
        !strstr(headers, "\nIf-Match:"))) {
959
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
960
    }
961
    if (rt->auth[0]) {
962
        char *str = ff_http_auth_create_response(&rt->auth_state,
963
                                                 rt->auth, url, method);
964
        if (str)
965
            av_strlcat(buf, str, sizeof(buf));
966
        av_free(str);
967
    }
968
    if (send_content_length > 0 && send_content)
969
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
970
    av_strlcat(buf, "\r\n", sizeof(buf));
971

    
972
    /* base64 encode rtsp if tunneling */
973
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
974
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
975
        out_buf = base64buf;
976
    }
977

    
978
    dprintf(s, "Sending:\n%s--\n", buf);
979

    
980
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
981
    if (send_content_length > 0 && send_content) {
982
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
983
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
984
                                    "with content data not supported\n");
985
            return AVERROR_PATCHWELCOME;
986
        }
987
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
988
    }
989
    rt->last_cmd_time = av_gettime();
990

    
991
    return 0;
992
}
993

    
994
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
995
                           const char *url, const char *headers)
996
{
997
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
998
}
999

    
1000
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1001
                     const char *headers, RTSPMessageHeader *reply,
1002
                     unsigned char **content_ptr)
1003
{
1004
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1005
                                         content_ptr, NULL, 0);
1006
}
1007

    
1008
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1009
                                  const char *method, const char *url,
1010
                                  const char *header,
1011
                                  RTSPMessageHeader *reply,
1012
                                  unsigned char **content_ptr,
1013
                                  const unsigned char *send_content,
1014
                                  int send_content_length)
1015
{
1016
    RTSPState *rt = s->priv_data;
1017
    HTTPAuthType cur_auth_type;
1018
    int ret;
1019

    
1020
retry:
1021
    cur_auth_type = rt->auth_state.auth_type;
1022
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1023
                                                   send_content,
1024
                                                   send_content_length)))
1025
        return ret;
1026

    
1027
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1028
        return ret;
1029

    
1030
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1031
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1032
        goto retry;
1033

    
1034
    if (reply->status_code > 400){
1035
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1036
               method,
1037
               reply->status_code,
1038
               reply->reason);
1039
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1040
    }
1041

    
1042
    return 0;
1043
}
1044

    
1045
/**
1046
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1047
 */
1048
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1049
                              int lower_transport, const char *real_challenge)
1050
{
1051
    RTSPState *rt = s->priv_data;
1052
    int rtx, j, i, err, interleave = 0;
1053
    RTSPStream *rtsp_st;
1054
    RTSPMessageHeader reply1, *reply = &reply1;
1055
    char cmd[2048];
1056
    const char *trans_pref;
1057

    
1058
    if (rt->transport == RTSP_TRANSPORT_RDT)
1059
        trans_pref = "x-pn-tng";
1060
    else
1061
        trans_pref = "RTP/AVP";
1062

    
1063
    /* default timeout: 1 minute */
1064
    rt->timeout = 60;
1065

    
1066
    /* for each stream, make the setup request */
1067
    /* XXX: we assume the same server is used for the control of each
1068
     * RTSP stream */
1069

    
1070
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1071
        char transport[2048];
1072

    
1073
        /**
1074
         * WMS serves all UDP data over a single connection, the RTX, which
1075
         * isn't necessarily the first in the SDP but has to be the first
1076
         * to be set up, else the second/third SETUP will fail with a 461.
1077
         */
1078
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1079
             rt->server_type == RTSP_SERVER_WMS) {
1080
            if (i == 0) {
1081
                /* rtx first */
1082
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1083
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1084
                    if (len >= 4 &&
1085
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1086
                                "/rtx"))
1087
                        break;
1088
                }
1089
                if (rtx == rt->nb_rtsp_streams)
1090
                    return -1; /* no RTX found */
1091
                rtsp_st = rt->rtsp_streams[rtx];
1092
            } else
1093
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1094
        } else
1095
            rtsp_st = rt->rtsp_streams[i];
1096

    
1097
        /* RTP/UDP */
1098
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1099
            char buf[256];
1100

    
1101
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1102
                port = reply->transports[0].client_port_min;
1103
                goto have_port;
1104
            }
1105

    
1106
            /* first try in specified port range */
1107
            if (RTSP_RTP_PORT_MIN != 0) {
1108
                while (j <= RTSP_RTP_PORT_MAX) {
1109
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1110
                                "?localport=%d", j);
1111
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1112
                    j += 2;
1113
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1114
                        goto rtp_opened;
1115
                }
1116
            }
1117

    
1118
#if 0
1119
            /* then try on any port */
1120
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1121
                err = AVERROR_INVALIDDATA;
1122
                goto fail;
1123
            }
1124
#else
1125
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1126
            err = AVERROR(EIO);
1127
            goto fail;
1128
#endif
1129

    
1130
        rtp_opened:
1131
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1132
        have_port:
1133
            snprintf(transport, sizeof(transport) - 1,
1134
                     "%s/UDP;", trans_pref);
1135
            if (rt->server_type != RTSP_SERVER_REAL)
1136
                av_strlcat(transport, "unicast;", sizeof(transport));
1137
            av_strlcatf(transport, sizeof(transport),
1138
                     "client_port=%d", port);
1139
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1140
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1141
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1142
        }
1143

    
1144
        /* RTP/TCP */
1145
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1146
            /** For WMS streams, the application streams are only used for
1147
             * UDP. When trying to set it up for TCP streams, the server
1148
             * will return an error. Therefore, we skip those streams. */
1149
            if (rt->server_type == RTSP_SERVER_WMS &&
1150
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1151
                    AVMEDIA_TYPE_DATA)
1152
                continue;
1153
            snprintf(transport, sizeof(transport) - 1,
1154
                     "%s/TCP;", trans_pref);
1155
            if (rt->server_type == RTSP_SERVER_WMS)
1156
                av_strlcat(transport, "unicast;", sizeof(transport));
1157
            av_strlcatf(transport, sizeof(transport),
1158
                        "interleaved=%d-%d",
1159
                        interleave, interleave + 1);
1160
            interleave += 2;
1161
        }
1162

    
1163
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1164
            snprintf(transport, sizeof(transport) - 1,
1165
                     "%s/UDP;multicast", trans_pref);
1166
        }
1167
        if (s->oformat) {
1168
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1169
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1170
                   rt->server_type == RTSP_SERVER_WMS)
1171
            av_strlcat(transport, ";mode=play", sizeof(transport));
1172
        snprintf(cmd, sizeof(cmd),
1173
                 "Transport: %s\r\n",
1174
                 transport);
1175
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1176
            char real_res[41], real_csum[9];
1177
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1178
                                              real_challenge);
1179
            av_strlcatf(cmd, sizeof(cmd),
1180
                        "If-Match: %s\r\n"
1181
                        "RealChallenge2: %s, sd=%s\r\n",
1182
                        rt->session_id, real_res, real_csum);
1183
        }
1184
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1185
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1186
            err = 1;
1187
            goto fail;
1188
        } else if (reply->status_code != RTSP_STATUS_OK ||
1189
                   reply->nb_transports != 1) {
1190
            err = AVERROR_INVALIDDATA;
1191
            goto fail;
1192
        }
1193

    
1194
        /* XXX: same protocol for all streams is required */
1195
        if (i > 0) {
1196
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1197
                reply->transports[0].transport != rt->transport) {
1198
                err = AVERROR_INVALIDDATA;
1199
                goto fail;
1200
            }
1201
        } else {
1202
            rt->lower_transport = reply->transports[0].lower_transport;
1203
            rt->transport = reply->transports[0].transport;
1204
        }
1205

    
1206
        /* Fail if the server responded with another lower transport mode
1207
         * than what we requested. */
1208
        if (reply->transports[0].lower_transport != lower_transport) {
1209
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1210
            err = AVERROR_INVALIDDATA;
1211
            goto fail;
1212
        }
1213

    
1214
        switch(reply->transports[0].lower_transport) {
1215
        case RTSP_LOWER_TRANSPORT_TCP:
1216
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1217
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1218
            break;
1219

    
1220
        case RTSP_LOWER_TRANSPORT_UDP: {
1221
            char url[1024], options[30] = "";
1222

    
1223
            if (rt->filter_source)
1224
                av_strlcpy(options, "?connect=1", sizeof(options));
1225
            /* Use source address if specified */
1226
            if (reply->transports[0].source[0]) {
1227
                ff_url_join(url, sizeof(url), "rtp", NULL,
1228
                            reply->transports[0].source,
1229
                            reply->transports[0].server_port_min, options);
1230
            } else {
1231
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1232
                            reply->transports[0].server_port_min, options);
1233
            }
1234
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1235
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1236
                err = AVERROR_INVALIDDATA;
1237
                goto fail;
1238
            }
1239
            /* Try to initialize the connection state in a
1240
             * potential NAT router by sending dummy packets.
1241
             * RTP/RTCP dummy packets are used for RDT, too.
1242
             */
1243
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1244
                CONFIG_RTPDEC)
1245
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1246
            break;
1247
        }
1248
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1249
            char url[1024], namebuf[50];
1250
            struct sockaddr_storage addr;
1251
            int port, ttl;
1252

    
1253
            if (reply->transports[0].destination.ss_family) {
1254
                addr      = reply->transports[0].destination;
1255
                port      = reply->transports[0].port_min;
1256
                ttl       = reply->transports[0].ttl;
1257
            } else {
1258
                addr      = rtsp_st->sdp_ip;
1259
                port      = rtsp_st->sdp_port;
1260
                ttl       = rtsp_st->sdp_ttl;
1261
            }
1262
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1263
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1264
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1265
                        port, "?ttl=%d", ttl);
1266
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1267
                err = AVERROR_INVALIDDATA;
1268
                goto fail;
1269
            }
1270
            break;
1271
        }
1272
        }
1273

    
1274
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1275
            goto fail;
1276
    }
1277

    
1278
    if (reply->timeout > 0)
1279
        rt->timeout = reply->timeout;
1280

    
1281
    if (rt->server_type == RTSP_SERVER_REAL)
1282
        rt->need_subscription = 1;
1283

    
1284
    return 0;
1285

    
1286
fail:
1287
    ff_rtsp_undo_setup(s);
1288
    return err;
1289
}
1290

    
1291
void ff_rtsp_close_connections(AVFormatContext *s)
1292
{
1293
    RTSPState *rt = s->priv_data;
1294
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1295
    url_close(rt->rtsp_hd);
1296
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1297
}
1298

    
1299
int ff_rtsp_connect(AVFormatContext *s)
1300
{
1301
    RTSPState *rt = s->priv_data;
1302
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1303
    char *option_list, *option, *filename;
1304
    int port, err, tcp_fd;
1305
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1306
    int lower_transport_mask = 0;
1307
    char real_challenge[64] = "";
1308
    struct sockaddr_storage peer;
1309
    socklen_t peer_len = sizeof(peer);
1310

    
1311
    if (!ff_network_init())
1312
        return AVERROR(EIO);
1313
redirect:
1314
    rt->control_transport = RTSP_MODE_PLAIN;
1315
    /* extract hostname and port */
1316
    av_url_split(NULL, 0, auth, sizeof(auth),
1317
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1318
    if (*auth) {
1319
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1320
    }
1321
    if (port < 0)
1322
        port = RTSP_DEFAULT_PORT;
1323

    
1324
    /* search for options */
1325
    option_list = strrchr(path, '?');
1326
    if (option_list) {
1327
        /* Strip out the RTSP specific options, write out the rest of
1328
         * the options back into the same string. */
1329
        filename = option_list;
1330
        while (option_list) {
1331
            /* move the option pointer */
1332
            option = ++option_list;
1333
            option_list = strchr(option_list, '&');
1334
            if (option_list)
1335
                *option_list = 0;
1336

    
1337
            /* handle the options */
1338
            if (!strcmp(option, "udp")) {
1339
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1340
            } else if (!strcmp(option, "multicast")) {
1341
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1342
            } else if (!strcmp(option, "tcp")) {
1343
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1344
            } else if(!strcmp(option, "http")) {
1345
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1346
                rt->control_transport = RTSP_MODE_TUNNEL;
1347
            } else if (!strcmp(option, "filter_src")) {
1348
                rt->filter_source = 1;
1349
            } else {
1350
                /* Write options back into the buffer, using memmove instead
1351
                 * of strcpy since the strings may overlap. */
1352
                int len = strlen(option);
1353
                memmove(++filename, option, len);
1354
                filename += len;
1355
                if (option_list) *filename = '&';
1356
            }
1357
        }
1358
        *filename = 0;
1359
    }
1360

    
1361
    if (!lower_transport_mask)
1362
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1363

    
1364
    if (s->oformat) {
1365
        /* Only UDP or TCP - UDP multicast isn't supported. */
1366
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1367
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1368
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1369
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1370
                                    "only UDP and TCP are supported for output.\n");
1371
            err = AVERROR(EINVAL);
1372
            goto fail;
1373
        }
1374
    }
1375

    
1376
    /* Construct the URI used in request; this is similar to s->filename,
1377
     * but with authentication credentials removed and RTSP specific options
1378
     * stripped out. */
1379
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1380
                host, port, "%s", path);
1381

    
1382
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1383
        /* set up initial handshake for tunneling */
1384
        char httpname[1024];
1385
        char sessioncookie[17];
1386
        char headers[1024];
1387

    
1388
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1389
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1390
                 av_get_random_seed(), av_get_random_seed());
1391

    
1392
        /* GET requests */
1393
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1394
            err = AVERROR(EIO);
1395
            goto fail;
1396
        }
1397

    
1398
        /* generate GET headers */
1399
        snprintf(headers, sizeof(headers),
1400
                 "x-sessioncookie: %s\r\n"
1401
                 "Accept: application/x-rtsp-tunnelled\r\n"
1402
                 "Pragma: no-cache\r\n"
1403
                 "Cache-Control: no-cache\r\n",
1404
                 sessioncookie);
1405
        ff_http_set_headers(rt->rtsp_hd, headers);
1406

    
1407
        /* complete the connection */
1408
        if (url_connect(rt->rtsp_hd)) {
1409
            err = AVERROR(EIO);
1410
            goto fail;
1411
        }
1412

    
1413
        /* POST requests */
1414
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1415
            err = AVERROR(EIO);
1416
            goto fail;
1417
        }
1418

    
1419
        /* generate POST headers */
1420
        snprintf(headers, sizeof(headers),
1421
                 "x-sessioncookie: %s\r\n"
1422
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1423
                 "Pragma: no-cache\r\n"
1424
                 "Cache-Control: no-cache\r\n"
1425
                 "Content-Length: 32767\r\n"
1426
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1427
                 sessioncookie);
1428
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1429
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1430

    
1431
        /* Initialize the authentication state for the POST session. The HTTP
1432
         * protocol implementation doesn't properly handle multi-pass
1433
         * authentication for POST requests, since it would require one of
1434
         * the following:
1435
         * - implementing Expect: 100-continue, which many HTTP servers
1436
         *   don't support anyway, even less the RTSP servers that do HTTP
1437
         *   tunneling
1438
         * - sending the whole POST data until getting a 401 reply specifying
1439
         *   what authentication method to use, then resending all that data
1440
         * - waiting for potential 401 replies directly after sending the
1441
         *   POST header (waiting for some unspecified time)
1442
         * Therefore, we copy the full auth state, which works for both basic
1443
         * and digest. (For digest, we would have to synchronize the nonce
1444
         * count variable between the two sessions, if we'd do more requests
1445
         * with the original session, though.)
1446
         */
1447
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1448

    
1449
        /* complete the connection */
1450
        if (url_connect(rt->rtsp_hd_out)) {
1451
            err = AVERROR(EIO);
1452
            goto fail;
1453
        }
1454
    } else {
1455
        /* open the tcp connection */
1456
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1457
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1458
            err = AVERROR(EIO);
1459
            goto fail;
1460
        }
1461
        rt->rtsp_hd_out = rt->rtsp_hd;
1462
    }
1463
    rt->seq = 0;
1464

    
1465
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1466
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1467
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1468
                    NULL, 0, NI_NUMERICHOST);
1469
    }
1470

    
1471
    /* request options supported by the server; this also detects server
1472
     * type */
1473
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1474
        cmd[0] = 0;
1475
        if (rt->server_type == RTSP_SERVER_REAL)
1476
            av_strlcat(cmd,
1477
                       /**
1478
                        * The following entries are required for proper
1479
                        * streaming from a Realmedia server. They are
1480
                        * interdependent in some way although we currently
1481
                        * don't quite understand how. Values were copied
1482
                        * from mplayer SVN r23589.
1483
                        * @param CompanyID is a 16-byte ID in base64
1484
                        * @param ClientChallenge is a 16-byte ID in hex
1485
                        */
1486
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1487
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1488
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1489
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1490
                       sizeof(cmd));
1491
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1492
        if (reply->status_code != RTSP_STATUS_OK) {
1493
            err = AVERROR_INVALIDDATA;
1494
            goto fail;
1495
        }
1496

    
1497
        /* detect server type if not standard-compliant RTP */
1498
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1499
            rt->server_type = RTSP_SERVER_REAL;
1500
            continue;
1501
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1502
            rt->server_type = RTSP_SERVER_WMS;
1503
        } else if (rt->server_type == RTSP_SERVER_REAL)
1504
            strcpy(real_challenge, reply->real_challenge);
1505
        break;
1506
    }
1507

    
1508
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1509
        err = ff_rtsp_setup_input_streams(s, reply);
1510
    else if (CONFIG_RTSP_MUXER)
1511
        err = ff_rtsp_setup_output_streams(s, host);
1512
    if (err)
1513
        goto fail;
1514

    
1515
    do {
1516
        int lower_transport = ff_log2_tab[lower_transport_mask &
1517
                                  ~(lower_transport_mask - 1)];
1518

    
1519
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1520
                                 rt->server_type == RTSP_SERVER_REAL ?
1521
                                     real_challenge : NULL);
1522
        if (err < 0)
1523
            goto fail;
1524
        lower_transport_mask &= ~(1 << lower_transport);
1525
        if (lower_transport_mask == 0 && err == 1) {
1526
            err = FF_NETERROR(EPROTONOSUPPORT);
1527
            goto fail;
1528
        }
1529
    } while (err);
1530

    
1531
    rt->lower_transport_mask = lower_transport_mask;
1532
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1533
    rt->state = RTSP_STATE_IDLE;
1534
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1535
    return 0;
1536
 fail:
1537
    ff_rtsp_close_streams(s);
1538
    ff_rtsp_close_connections(s);
1539
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1540
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1541
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1542
               reply->status_code,
1543
               s->filename);
1544
        goto redirect;
1545
    }
1546
    ff_network_close();
1547
    return err;
1548
}
1549
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1550

    
1551
#if CONFIG_RTPDEC
1552
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1553
                           uint8_t *buf, int buf_size, int64_t wait_end)
1554
{
1555
    RTSPState *rt = s->priv_data;
1556
    RTSPStream *rtsp_st;
1557
    fd_set rfds;
1558
    int fd, fd_rtcp, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
1559
    struct timeval tv;
1560

    
1561
    for (;;) {
1562
        if (url_interrupt_cb())
1563
            return AVERROR(EINTR);
1564
        if (wait_end && wait_end - av_gettime() < 0)
1565
            return AVERROR(EAGAIN);
1566
        FD_ZERO(&rfds);
1567
        if (rt->rtsp_hd) {
1568
            tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1569
            FD_SET(tcp_fd, &rfds);
1570
        } else {
1571
            fd_max = 0;
1572
            tcp_fd = -1;
1573
        }
1574
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1575
            rtsp_st = rt->rtsp_streams[i];
1576
            if (rtsp_st->rtp_handle) {
1577
                fd = url_get_file_handle(rtsp_st->rtp_handle);
1578
                fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1579
                if (FFMAX(fd, fd_rtcp) > fd_max)
1580
                    fd_max = FFMAX(fd, fd_rtcp);
1581
                FD_SET(fd, &rfds);
1582
                FD_SET(fd_rtcp, &rfds);
1583
            }
1584
        }
1585
        tv.tv_sec = 0;
1586
        tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
1587
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1588
        if (n > 0) {
1589
            timeout_cnt = 0;
1590
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
1591
                rtsp_st = rt->rtsp_streams[i];
1592
                if (rtsp_st->rtp_handle) {
1593
                    fd = url_get_file_handle(rtsp_st->rtp_handle);
1594
                    fd_rtcp = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1595
                    if (FD_ISSET(fd_rtcp, &rfds) || FD_ISSET(fd, &rfds)) {
1596
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1597
                        if (ret > 0) {
1598
                            *prtsp_st = rtsp_st;
1599
                            return ret;
1600
                        }
1601
                    }
1602
                }
1603
            }
1604
#if CONFIG_RTSP_DEMUXER
1605
            if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1606
                RTSPMessageHeader reply;
1607

    
1608
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1609
                if (ret < 0)
1610
                    return ret;
1611
                /* XXX: parse message */
1612
                if (rt->state != RTSP_STATE_STREAMING)
1613
                    return 0;
1614
            }
1615
#endif
1616
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1617
            return FF_NETERROR(ETIMEDOUT);
1618
        } else if (n < 0 && errno != EINTR)
1619
            return AVERROR(errno);
1620
    }
1621
}
1622

    
1623
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1624
{
1625
    RTSPState *rt = s->priv_data;
1626
    int ret, len;
1627
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1628
    int64_t wait_end = 0;
1629

    
1630
    if (rt->nb_byes == rt->nb_rtsp_streams)
1631
        return AVERROR_EOF;
1632

    
1633
    /* get next frames from the same RTP packet */
1634
    if (rt->cur_transport_priv) {
1635
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1636
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1637
        } else
1638
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1639
        if (ret == 0) {
1640
            rt->cur_transport_priv = NULL;
1641
            return 0;
1642
        } else if (ret == 1) {
1643
            return 0;
1644
        } else
1645
            rt->cur_transport_priv = NULL;
1646
    }
1647

    
1648
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1649
        int i;
1650
        int64_t first_queue_time = 0;
1651
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1652
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1653
            int64_t queue_time;
1654
            if (!rtpctx)
1655
                continue;
1656
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1657
            if (queue_time && (queue_time - first_queue_time < 0 ||
1658
                               !first_queue_time)) {
1659
                first_queue_time = queue_time;
1660
                first_queue_st   = rt->rtsp_streams[i];
1661
            }
1662
        }
1663
        if (first_queue_time)
1664
            wait_end = first_queue_time + s->max_delay;
1665
    }
1666

    
1667
    /* read next RTP packet */
1668
 redo:
1669
    if (!rt->recvbuf) {
1670
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1671
        if (!rt->recvbuf)
1672
            return AVERROR(ENOMEM);
1673
    }
1674

    
1675
    switch(rt->lower_transport) {
1676
    default:
1677
#if CONFIG_RTSP_DEMUXER
1678
    case RTSP_LOWER_TRANSPORT_TCP:
1679
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1680
        break;
1681
#endif
1682
    case RTSP_LOWER_TRANSPORT_UDP:
1683
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1684
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1685
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1686
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1687
        break;
1688
    }
1689
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1690
        rt->transport == RTSP_TRANSPORT_RTP) {
1691
        rtsp_st = first_queue_st;
1692
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1693
        goto end;
1694
    }
1695
    if (len < 0)
1696
        return len;
1697
    if (len == 0)
1698
        return AVERROR_EOF;
1699
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1700
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1701
    } else {
1702
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1703
        if (ret < 0) {
1704
            /* Either bad packet, or a RTCP packet. Check if the
1705
             * first_rtcp_ntp_time field was initialized. */
1706
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1707
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1708
                /* first_rtcp_ntp_time has been initialized for this stream,
1709
                 * copy the same value to all other uninitialized streams,
1710
                 * in order to map their timestamp origin to the same ntp time
1711
                 * as this one. */
1712
                int i;
1713
                AVStream *st = NULL;
1714
                if (rtsp_st->stream_index >= 0)
1715
                    st = s->streams[rtsp_st->stream_index];
1716
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1717
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1718
                    AVStream *st2 = NULL;
1719
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1720
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1721
                    if (rtpctx2 && st && st2 &&
1722
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1723
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1724
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1725
                            rtpctx->rtcp_ts_offset, st->time_base,
1726
                            st2->time_base);
1727
                    }
1728
                }
1729
            }
1730
            if (ret == -RTCP_BYE) {
1731
                rt->nb_byes++;
1732

    
1733
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1734
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1735

    
1736
                if (rt->nb_byes == rt->nb_rtsp_streams)
1737
                    return AVERROR_EOF;
1738
            }
1739
        }
1740
    }
1741
end:
1742
    if (ret < 0)
1743
        goto redo;
1744
    if (ret == 1)
1745
        /* more packets may follow, so we save the RTP context */
1746
        rt->cur_transport_priv = rtsp_st->transport_priv;
1747

    
1748
    return ret;
1749
}
1750
#endif /* CONFIG_RTPDEC */
1751

    
1752
#if CONFIG_SDP_DEMUXER
1753
static int sdp_probe(AVProbeData *p1)
1754
{
1755
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1756

    
1757
    /* we look for a line beginning "c=IN IP" */
1758
    while (p < p_end && *p != '\0') {
1759
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1760
            av_strstart(p, "c=IN IP", NULL))
1761
            return AVPROBE_SCORE_MAX / 2;
1762

    
1763
        while (p < p_end - 1 && *p != '\n') p++;
1764
        if (++p >= p_end)
1765
            break;
1766
        if (*p == '\r')
1767
            p++;
1768
    }
1769
    return 0;
1770
}
1771

    
1772
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1773
{
1774
    RTSPState *rt = s->priv_data;
1775
    RTSPStream *rtsp_st;
1776
    int size, i, err;
1777
    char *content;
1778
    char url[1024];
1779

    
1780
    if (!ff_network_init())
1781
        return AVERROR(EIO);
1782

    
1783
    /* read the whole sdp file */
1784
    /* XXX: better loading */
1785
    content = av_malloc(SDP_MAX_SIZE);
1786
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1787
    if (size <= 0) {
1788
        av_free(content);
1789
        return AVERROR_INVALIDDATA;
1790
    }
1791
    content[size] ='\0';
1792

    
1793
    ff_sdp_parse(s, content);
1794
    av_free(content);
1795

    
1796
    /* open each RTP stream */
1797
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
1798
        char namebuf[50];
1799
        rtsp_st = rt->rtsp_streams[i];
1800

    
1801
        getnameinfo((struct sockaddr*) &rtsp_st->sdp_ip, sizeof(rtsp_st->sdp_ip),
1802
                    namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1803
        ff_url_join(url, sizeof(url), "rtp", NULL,
1804
                    namebuf, rtsp_st->sdp_port,
1805
                    "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1806
                    rtsp_st->sdp_ttl);
1807
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1808
            err = AVERROR_INVALIDDATA;
1809
            goto fail;
1810
        }
1811
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1812
            goto fail;
1813
    }
1814
    return 0;
1815
fail:
1816
    ff_rtsp_close_streams(s);
1817
    ff_network_close();
1818
    return err;
1819
}
1820

    
1821
static int sdp_read_close(AVFormatContext *s)
1822
{
1823
    ff_rtsp_close_streams(s);
1824
    ff_network_close();
1825
    return 0;
1826
}
1827

    
1828
AVInputFormat sdp_demuxer = {
1829
    "sdp",
1830
    NULL_IF_CONFIG_SMALL("SDP"),
1831
    sizeof(RTSPState),
1832
    sdp_probe,
1833
    sdp_read_header,
1834
    ff_rtsp_fetch_packet,
1835
    sdp_read_close,
1836
};
1837
#endif /* CONFIG_SDP_DEMUXER */
1838

    
1839
#if CONFIG_RTP_DEMUXER
1840
static int rtp_probe(AVProbeData *p)
1841
{
1842
    if (av_strstart(p->filename, "rtp:", NULL))
1843
        return AVPROBE_SCORE_MAX;
1844
    return 0;
1845
}
1846

    
1847
static int rtp_read_header(AVFormatContext *s,
1848
                           AVFormatParameters *ap)
1849
{
1850
    uint8_t recvbuf[1500];
1851
    char host[500], sdp[500];
1852
    int ret, port;
1853
    URLContext* in = NULL;
1854
    int payload_type;
1855
    AVCodecContext codec;
1856
    struct sockaddr_storage addr;
1857
    ByteIOContext pb;
1858
    socklen_t addrlen = sizeof(addr);
1859

    
1860
    if (!ff_network_init())
1861
        return AVERROR(EIO);
1862

    
1863
    ret = url_open(&in, s->filename, URL_RDONLY);
1864
    if (ret)
1865
        goto fail;
1866

    
1867
    while (1) {
1868
        ret = url_read(in, recvbuf, sizeof(recvbuf));
1869
        if (ret == AVERROR(EAGAIN))
1870
            continue;
1871
        if (ret < 0)
1872
            goto fail;
1873
        if (ret < 12) {
1874
            av_log(s, AV_LOG_WARNING, "Received too short packet\n");
1875
            continue;
1876
        }
1877

    
1878
        if ((recvbuf[0] & 0xc0) != 0x80) {
1879
            av_log(s, AV_LOG_WARNING, "Unsupported RTP version packet "
1880
                                      "received\n");
1881
            continue;
1882
        }
1883

    
1884
        payload_type = recvbuf[1] & 0x7f;
1885
        break;
1886
    }
1887
    getsockname(url_get_file_handle(in), (struct sockaddr*) &addr, &addrlen);
1888
    url_close(in);
1889
    in = NULL;
1890

    
1891
    memset(&codec, 0, sizeof(codec));
1892
    if (ff_rtp_get_codec_info(&codec, payload_type)) {
1893
        av_log(s, AV_LOG_ERROR, "Unable to receive RTP payload type %d "
1894
                                "without an SDP file describing it\n",
1895
                                 payload_type);
1896
        goto fail;
1897
    }
1898
    if (codec.codec_type != AVMEDIA_TYPE_DATA) {
1899
        av_log(s, AV_LOG_WARNING, "Guessing on RTP content - if not received "
1900
                                  "properly you need an SDP file "
1901
                                  "describing it\n");
1902
    }
1903

    
1904
    av_url_split(NULL, 0, NULL, 0, host, sizeof(host), &port,
1905
                 NULL, 0, s->filename);
1906

    
1907
    snprintf(sdp, sizeof(sdp),
1908
             "v=0\r\nc=IN IP%d %s\r\nm=%s %d RTP/AVP %d\r\n",
1909
             addr.ss_family == AF_INET ? 4 : 6, host,
1910
             codec.codec_type == AVMEDIA_TYPE_DATA  ? "application" :
1911
             codec.codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio",
1912
             port, payload_type);
1913
    av_log(s, AV_LOG_VERBOSE, "SDP:\n%s\n", sdp);
1914

    
1915
    init_put_byte(&pb, sdp, strlen(sdp), 0, NULL, NULL, NULL, NULL);
1916
    s->pb = &pb;
1917

    
1918
    /* sdp_read_header initializes this again */
1919
    ff_network_close();
1920

    
1921
    ret = sdp_read_header(s, ap);
1922
    s->pb = NULL;
1923
    return ret;
1924

    
1925
fail:
1926
    if (in)
1927
        url_close(in);
1928
    ff_network_close();
1929
    return ret;
1930
}
1931

    
1932
AVInputFormat rtp_demuxer = {
1933
    "rtp",
1934
    NULL_IF_CONFIG_SMALL("RTP input format"),
1935
    sizeof(RTSPState),
1936
    rtp_probe,
1937
    rtp_read_header,
1938
    ff_rtsp_fetch_packet,
1939
    sdp_read_close,
1940
    .flags = AVFMT_NOFILE,
1941
};
1942
#endif /* CONFIG_RTP_DEMUXER */
1943