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ffmpeg / libavformat / rtsp.c @ b2dd842d

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1
/*
2
 * RTSP/SDP client
3
 * Copyright (c) 2002 Fabrice Bellard
4
 *
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 * This file is part of FFmpeg.
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 *
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 * 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.
11
 *
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 * FFmpeg is distributed in the hope that it will be useful,
13
 * 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

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

    
28
#include <sys/time.h>
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#if HAVE_POLL_H
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#include <poll.h>
31
#endif
32
#include <strings.h>
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#include "internal.h"
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#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"
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#include "rtpenc_chain.h"
43

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

    
47
/* Timeout values for socket poll, in ms,
48
 * and read_packet(), in seconds  */
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#define POLL_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 / POLL_TIMEOUT_MS
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#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;
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}
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
    av_dlog(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
            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
277
            rtsp_st->sdp_ip = sdp_ip;
278
            rtsp_st->sdp_ttl = ttl;
279
        }
280
        break;
281
    case 's':
282
        av_metadata_set2(&s->metadata, "title", p, 0);
283
        break;
284
    case 'i':
285
        if (s->nb_streams == 0) {
286
            av_metadata_set2(&s->metadata, "comment", p, 0);
287
            break;
288
        }
289
        break;
290
    case 'm':
291
        /* new stream */
292
        s1->skip_media = 0;
293
        get_word(st_type, sizeof(st_type), &p);
294
        if (!strcmp(st_type, "audio")) {
295
            codec_type = AVMEDIA_TYPE_AUDIO;
296
        } else if (!strcmp(st_type, "video")) {
297
            codec_type = AVMEDIA_TYPE_VIDEO;
298
        } else if (!strcmp(st_type, "application")) {
299
            codec_type = AVMEDIA_TYPE_DATA;
300
        } else {
301
            s1->skip_media = 1;
302
            return;
303
        }
304
        rtsp_st = av_mallocz(sizeof(RTSPStream));
305
        if (!rtsp_st)
306
            return;
307
        rtsp_st->stream_index = -1;
308
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
309

    
310
        rtsp_st->sdp_ip = s1->default_ip;
311
        rtsp_st->sdp_ttl = s1->default_ttl;
312

    
313
        get_word(buf1, sizeof(buf1), &p); /* port */
314
        rtsp_st->sdp_port = atoi(buf1);
315

    
316
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
317

    
318
        /* XXX: handle list of formats */
319
        get_word(buf1, sizeof(buf1), &p); /* format list */
320
        rtsp_st->sdp_payload_type = atoi(buf1);
321

    
322
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
323
            /* no corresponding stream */
324
        } else {
325
            st = av_new_stream(s, rt->nb_rtsp_streams - 1);
326
            if (!st)
327
                return;
328
            rtsp_st->stream_index = st->index;
329
            st->codec->codec_type = codec_type;
330
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
331
                RTPDynamicProtocolHandler *handler;
332
                /* if standard payload type, we can find the codec right now */
333
                ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
334
                if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
335
                    st->codec->sample_rate > 0)
336
                    av_set_pts_info(st, 32, 1, st->codec->sample_rate);
337
                /* Even static payload types may need a custom depacketizer */
338
                handler = ff_rtp_handler_find_by_id(
339
                              rtsp_st->sdp_payload_type, st->codec->codec_type);
340
                init_rtp_handler(handler, rtsp_st, st->codec);
341
            }
342
        }
343
        /* put a default control url */
344
        av_strlcpy(rtsp_st->control_url, rt->control_uri,
345
                   sizeof(rtsp_st->control_url));
346
        break;
347
    case 'a':
348
        if (av_strstart(p, "control:", &p)) {
349
            if (s->nb_streams == 0) {
350
                if (!strncmp(p, "rtsp://", 7))
351
                    av_strlcpy(rt->control_uri, p,
352
                               sizeof(rt->control_uri));
353
            } else {
354
                char proto[32];
355
                /* get the control url */
356
                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
357

    
358
                /* XXX: may need to add full url resolution */
359
                av_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
360
                             NULL, NULL, 0, p);
361
                if (proto[0] == '\0') {
362
                    /* relative control URL */
363
                    if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
364
                    av_strlcat(rtsp_st->control_url, "/",
365
                               sizeof(rtsp_st->control_url));
366
                    av_strlcat(rtsp_st->control_url, p,
367
                               sizeof(rtsp_st->control_url));
368
                } else
369
                    av_strlcpy(rtsp_st->control_url, p,
370
                               sizeof(rtsp_st->control_url));
371
            }
372
        } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
373
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
374
            get_word(buf1, sizeof(buf1), &p);
375
            payload_type = atoi(buf1);
376
            st = s->streams[s->nb_streams - 1];
377
            rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
378
            sdp_parse_rtpmap(s, st, rtsp_st, payload_type, p);
379
        } else if (av_strstart(p, "fmtp:", &p) ||
380
                   av_strstart(p, "framesize:", &p)) {
381
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
382
            // let dynamic protocol handlers have a stab at the line.
383
            get_word(buf1, sizeof(buf1), &p);
384
            payload_type = atoi(buf1);
385
            for (i = 0; i < rt->nb_rtsp_streams; i++) {
386
                rtsp_st = rt->rtsp_streams[i];
387
                if (rtsp_st->sdp_payload_type == payload_type &&
388
                    rtsp_st->dynamic_handler &&
389
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
390
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
391
                        rtsp_st->dynamic_protocol_context, buf);
392
            }
393
        } else if (av_strstart(p, "range:", &p)) {
394
            int64_t start, end;
395

    
396
            // this is so that seeking on a streamed file can work.
397
            rtsp_parse_range_npt(p, &start, &end);
398
            s->start_time = start;
399
            /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
400
            s->duration   = (end == AV_NOPTS_VALUE) ?
401
                            AV_NOPTS_VALUE : end - start;
402
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
403
            if (atoi(p) == 1)
404
                rt->transport = RTSP_TRANSPORT_RDT;
405
        } else if (av_strstart(p, "SampleRate:integer;", &p) &&
406
                   s->nb_streams > 0) {
407
            st = s->streams[s->nb_streams - 1];
408
            st->codec->sample_rate = atoi(p);
409
        } else {
410
            if (rt->server_type == RTSP_SERVER_WMS)
411
                ff_wms_parse_sdp_a_line(s, p);
412
            if (s->nb_streams > 0) {
413
                if (rt->server_type == RTSP_SERVER_REAL)
414
                    ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
415

    
416
                rtsp_st = rt->rtsp_streams[rt->nb_rtsp_streams - 1];
417
                if (rtsp_st->dynamic_handler &&
418
                    rtsp_st->dynamic_handler->parse_sdp_a_line)
419
                    rtsp_st->dynamic_handler->parse_sdp_a_line(s,
420
                        s->nb_streams - 1,
421
                        rtsp_st->dynamic_protocol_context, buf);
422
            }
423
        }
424
        break;
425
    }
426
}
427

    
428
/**
429
 * Parse the sdp description and allocate the rtp streams and the
430
 * pollfd array used for udp ones.
431
 */
432

    
433
int ff_sdp_parse(AVFormatContext *s, const char *content)
434
{
435
    RTSPState *rt = s->priv_data;
436
    const char *p;
437
    int letter;
438
    /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
439
     * contain long SDP lines containing complete ASF Headers (several
440
     * kB) or arrays of MDPR (RM stream descriptor) headers plus
441
     * "rulebooks" describing their properties. Therefore, the SDP line
442
     * buffer is large.
443
     *
444
     * The Vorbis FMTP line can be up to 16KB - see xiph_parse_sdp_line
445
     * in rtpdec_xiph.c. */
446
    char buf[16384], *q;
447
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
448

    
449
    memset(s1, 0, sizeof(SDPParseState));
450
    p = content;
451
    for (;;) {
452
        p += strspn(p, SPACE_CHARS);
453
        letter = *p;
454
        if (letter == '\0')
455
            break;
456
        p++;
457
        if (*p != '=')
458
            goto next_line;
459
        p++;
460
        /* get the content */
461
        q = buf;
462
        while (*p != '\n' && *p != '\r' && *p != '\0') {
463
            if ((q - buf) < sizeof(buf) - 1)
464
                *q++ = *p;
465
            p++;
466
        }
467
        *q = '\0';
468
        sdp_parse_line(s, s1, letter, buf);
469
    next_line:
470
        while (*p != '\n' && *p != '\0')
471
            p++;
472
        if (*p == '\n')
473
            p++;
474
    }
475
    rt->p = av_malloc(sizeof(struct pollfd)*2*(rt->nb_rtsp_streams+1));
476
    if (!rt->p) return AVERROR(ENOMEM);
477
    return 0;
478
}
479
#endif /* CONFIG_RTPDEC */
480

    
481
void ff_rtsp_undo_setup(AVFormatContext *s)
482
{
483
    RTSPState *rt = s->priv_data;
484
    int i;
485

    
486
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
487
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
488
        if (!rtsp_st)
489
            continue;
490
        if (rtsp_st->transport_priv) {
491
            if (s->oformat) {
492
                AVFormatContext *rtpctx = rtsp_st->transport_priv;
493
                av_write_trailer(rtpctx);
494
                if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
495
                    uint8_t *ptr;
496
                    url_close_dyn_buf(rtpctx->pb, &ptr);
497
                    av_free(ptr);
498
                } else {
499
                    url_fclose(rtpctx->pb);
500
                }
501
                avformat_free_context(rtpctx);
502
            } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
503
                ff_rdt_parse_close(rtsp_st->transport_priv);
504
            else if (CONFIG_RTPDEC)
505
                rtp_parse_close(rtsp_st->transport_priv);
506
        }
507
        rtsp_st->transport_priv = NULL;
508
        if (rtsp_st->rtp_handle)
509
            url_close(rtsp_st->rtp_handle);
510
        rtsp_st->rtp_handle = NULL;
511
    }
512
}
513

    
514
/* close and free RTSP streams */
515
void ff_rtsp_close_streams(AVFormatContext *s)
516
{
517
    RTSPState *rt = s->priv_data;
518
    int i;
519
    RTSPStream *rtsp_st;
520

    
521
    ff_rtsp_undo_setup(s);
522
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
523
        rtsp_st = rt->rtsp_streams[i];
524
        if (rtsp_st) {
525
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
526
                rtsp_st->dynamic_handler->close(
527
                    rtsp_st->dynamic_protocol_context);
528
            av_free(rtsp_st);
529
        }
530
    }
531
    av_free(rt->rtsp_streams);
532
    if (rt->asf_ctx) {
533
        av_close_input_stream (rt->asf_ctx);
534
        rt->asf_ctx = NULL;
535
    }
536
    av_free(rt->p);
537
    av_free(rt->recvbuf);
538
}
539

    
540
static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
541
{
542
    RTSPState *rt = s->priv_data;
543
    AVStream *st = NULL;
544

    
545
    /* open the RTP context */
546
    if (rtsp_st->stream_index >= 0)
547
        st = s->streams[rtsp_st->stream_index];
548
    if (!st)
549
        s->ctx_flags |= AVFMTCTX_NOHEADER;
550

    
551
    if (s->oformat && CONFIG_RTSP_MUXER) {
552
        rtsp_st->transport_priv = ff_rtp_chain_mux_open(s, st,
553
                                      rtsp_st->rtp_handle,
554
                                      RTSP_TCP_MAX_PACKET_SIZE);
555
        /* Ownership of rtp_handle is passed to the rtp mux context */
556
        rtsp_st->rtp_handle = NULL;
557
    } else if (rt->transport == RTSP_TRANSPORT_RDT && CONFIG_RTPDEC)
558
        rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
559
                                            rtsp_st->dynamic_protocol_context,
560
                                            rtsp_st->dynamic_handler);
561
    else if (CONFIG_RTPDEC)
562
        rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
563
                                         rtsp_st->sdp_payload_type,
564
            (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP || !s->max_delay)
565
            ? 0 : RTP_REORDER_QUEUE_DEFAULT_SIZE);
566

    
567
    if (!rtsp_st->transport_priv) {
568
         return AVERROR(ENOMEM);
569
    } else if (rt->transport != RTSP_TRANSPORT_RDT && CONFIG_RTPDEC) {
570
        if (rtsp_st->dynamic_handler) {
571
            rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
572
                                           rtsp_st->dynamic_protocol_context,
573
                                           rtsp_st->dynamic_handler);
574
        }
575
    }
576

    
577
    return 0;
578
}
579

    
580
#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
581
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
582
{
583
    const char *p;
584
    int v;
585

    
586
    p = *pp;
587
    p += strspn(p, SPACE_CHARS);
588
    v = strtol(p, (char **)&p, 10);
589
    if (*p == '-') {
590
        p++;
591
        *min_ptr = v;
592
        v = strtol(p, (char **)&p, 10);
593
        *max_ptr = v;
594
    } else {
595
        *min_ptr = v;
596
        *max_ptr = v;
597
    }
598
    *pp = p;
599
}
600

    
601
/* XXX: only one transport specification is parsed */
602
static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
603
{
604
    char transport_protocol[16];
605
    char profile[16];
606
    char lower_transport[16];
607
    char parameter[16];
608
    RTSPTransportField *th;
609
    char buf[256];
610

    
611
    reply->nb_transports = 0;
612

    
613
    for (;;) {
614
        p += strspn(p, SPACE_CHARS);
615
        if (*p == '\0')
616
            break;
617

    
618
        th = &reply->transports[reply->nb_transports];
619

    
620
        get_word_sep(transport_protocol, sizeof(transport_protocol),
621
                     "/", &p);
622
        if (!strcasecmp (transport_protocol, "rtp")) {
623
            get_word_sep(profile, sizeof(profile), "/;,", &p);
624
            lower_transport[0] = '\0';
625
            /* rtp/avp/<protocol> */
626
            if (*p == '/') {
627
                get_word_sep(lower_transport, sizeof(lower_transport),
628
                             ";,", &p);
629
            }
630
            th->transport = RTSP_TRANSPORT_RTP;
631
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
632
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
633
            /* x-pn-tng/<protocol> */
634
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
635
            profile[0] = '\0';
636
            th->transport = RTSP_TRANSPORT_RDT;
637
        }
638
        if (!strcasecmp(lower_transport, "TCP"))
639
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
640
        else
641
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
642

    
643
        if (*p == ';')
644
            p++;
645
        /* get each parameter */
646
        while (*p != '\0' && *p != ',') {
647
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
648
            if (!strcmp(parameter, "port")) {
649
                if (*p == '=') {
650
                    p++;
651
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
652
                }
653
            } else if (!strcmp(parameter, "client_port")) {
654
                if (*p == '=') {
655
                    p++;
656
                    rtsp_parse_range(&th->client_port_min,
657
                                     &th->client_port_max, &p);
658
                }
659
            } else if (!strcmp(parameter, "server_port")) {
660
                if (*p == '=') {
661
                    p++;
662
                    rtsp_parse_range(&th->server_port_min,
663
                                     &th->server_port_max, &p);
664
                }
665
            } else if (!strcmp(parameter, "interleaved")) {
666
                if (*p == '=') {
667
                    p++;
668
                    rtsp_parse_range(&th->interleaved_min,
669
                                     &th->interleaved_max, &p);
670
                }
671
            } else if (!strcmp(parameter, "multicast")) {
672
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
673
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
674
            } else if (!strcmp(parameter, "ttl")) {
675
                if (*p == '=') {
676
                    p++;
677
                    th->ttl = strtol(p, (char **)&p, 10);
678
                }
679
            } else if (!strcmp(parameter, "destination")) {
680
                if (*p == '=') {
681
                    p++;
682
                    get_word_sep(buf, sizeof(buf), ";,", &p);
683
                    get_sockaddr(buf, &th->destination);
684
                }
685
            } else if (!strcmp(parameter, "source")) {
686
                if (*p == '=') {
687
                    p++;
688
                    get_word_sep(buf, sizeof(buf), ";,", &p);
689
                    av_strlcpy(th->source, buf, sizeof(th->source));
690
                }
691
            }
692

    
693
            while (*p != ';' && *p != '\0' && *p != ',')
694
                p++;
695
            if (*p == ';')
696
                p++;
697
        }
698
        if (*p == ',')
699
            p++;
700

    
701
        reply->nb_transports++;
702
    }
703
}
704

    
705
static void handle_rtp_info(RTSPState *rt, const char *url,
706
                            uint32_t seq, uint32_t rtptime)
707
{
708
    int i;
709
    if (!rtptime || !url[0])
710
        return;
711
    if (rt->transport != RTSP_TRANSPORT_RTP)
712
        return;
713
    for (i = 0; i < rt->nb_rtsp_streams; i++) {
714
        RTSPStream *rtsp_st = rt->rtsp_streams[i];
715
        RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
716
        if (!rtpctx)
717
            continue;
718
        if (!strcmp(rtsp_st->control_url, url)) {
719
            rtpctx->base_timestamp = rtptime;
720
            break;
721
        }
722
    }
723
}
724

    
725
static void rtsp_parse_rtp_info(RTSPState *rt, const char *p)
726
{
727
    int read = 0;
728
    char key[20], value[1024], url[1024] = "";
729
    uint32_t seq = 0, rtptime = 0;
730

    
731
    for (;;) {
732
        p += strspn(p, SPACE_CHARS);
733
        if (!*p)
734
            break;
735
        get_word_sep(key, sizeof(key), "=", &p);
736
        if (*p != '=')
737
            break;
738
        p++;
739
        get_word_sep(value, sizeof(value), ";, ", &p);
740
        read++;
741
        if (!strcmp(key, "url"))
742
            av_strlcpy(url, value, sizeof(url));
743
        else if (!strcmp(key, "seq"))
744
            seq = strtol(value, NULL, 10);
745
        else if (!strcmp(key, "rtptime"))
746
            rtptime = strtol(value, NULL, 10);
747
        if (*p == ',') {
748
            handle_rtp_info(rt, url, seq, rtptime);
749
            url[0] = '\0';
750
            seq = rtptime = 0;
751
            read = 0;
752
        }
753
        if (*p)
754
            p++;
755
    }
756
    if (read > 0)
757
        handle_rtp_info(rt, url, seq, rtptime);
758
}
759

    
760
void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
761
                        RTSPState *rt, const char *method)
762
{
763
    const char *p;
764

    
765
    /* NOTE: we do case independent match for broken servers */
766
    p = buf;
767
    if (av_stristart(p, "Session:", &p)) {
768
        int t;
769
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
770
        if (av_stristart(p, ";timeout=", &p) &&
771
            (t = strtol(p, NULL, 10)) > 0) {
772
            reply->timeout = t;
773
        }
774
    } else if (av_stristart(p, "Content-Length:", &p)) {
775
        reply->content_length = strtol(p, NULL, 10);
776
    } else if (av_stristart(p, "Transport:", &p)) {
777
        rtsp_parse_transport(reply, p);
778
    } else if (av_stristart(p, "CSeq:", &p)) {
779
        reply->seq = strtol(p, NULL, 10);
780
    } else if (av_stristart(p, "Range:", &p)) {
781
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
782
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
783
        p += strspn(p, SPACE_CHARS);
784
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
785
    } else if (av_stristart(p, "Server:", &p)) {
786
        p += strspn(p, SPACE_CHARS);
787
        av_strlcpy(reply->server, p, sizeof(reply->server));
788
    } else if (av_stristart(p, "Notice:", &p) ||
789
               av_stristart(p, "X-Notice:", &p)) {
790
        reply->notice = strtol(p, NULL, 10);
791
    } else if (av_stristart(p, "Location:", &p)) {
792
        p += strspn(p, SPACE_CHARS);
793
        av_strlcpy(reply->location, p , sizeof(reply->location));
794
    } else if (av_stristart(p, "WWW-Authenticate:", &p) && rt) {
795
        p += strspn(p, SPACE_CHARS);
796
        ff_http_auth_handle_header(&rt->auth_state, "WWW-Authenticate", p);
797
    } else if (av_stristart(p, "Authentication-Info:", &p) && rt) {
798
        p += strspn(p, SPACE_CHARS);
799
        ff_http_auth_handle_header(&rt->auth_state, "Authentication-Info", p);
800
    } else if (av_stristart(p, "Content-Base:", &p) && rt) {
801
        p += strspn(p, SPACE_CHARS);
802
        if (method && !strcmp(method, "DESCRIBE"))
803
            av_strlcpy(rt->control_uri, p , sizeof(rt->control_uri));
804
    } else if (av_stristart(p, "RTP-Info:", &p) && rt) {
805
        p += strspn(p, SPACE_CHARS);
806
        if (method && !strcmp(method, "PLAY"))
807
            rtsp_parse_rtp_info(rt, p);
808
    }
809
}
810

    
811
/* skip a RTP/TCP interleaved packet */
812
void ff_rtsp_skip_packet(AVFormatContext *s)
813
{
814
    RTSPState *rt = s->priv_data;
815
    int ret, len, len1;
816
    uint8_t buf[1024];
817

    
818
    ret = url_read_complete(rt->rtsp_hd, buf, 3);
819
    if (ret != 3)
820
        return;
821
    len = AV_RB16(buf + 1);
822

    
823
    av_dlog(s, "skipping RTP packet len=%d\n", len);
824

    
825
    /* skip payload */
826
    while (len > 0) {
827
        len1 = len;
828
        if (len1 > sizeof(buf))
829
            len1 = sizeof(buf);
830
        ret = url_read_complete(rt->rtsp_hd, buf, len1);
831
        if (ret != len1)
832
            return;
833
        len -= len1;
834
    }
835
}
836

    
837
int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
838
                       unsigned char **content_ptr,
839
                       int return_on_interleaved_data, const char *method)
840
{
841
    RTSPState *rt = s->priv_data;
842
    char buf[4096], buf1[1024], *q;
843
    unsigned char ch;
844
    const char *p;
845
    int ret, content_length, line_count = 0;
846
    unsigned char *content = NULL;
847

    
848
    memset(reply, 0, sizeof(*reply));
849

    
850
    /* parse reply (XXX: use buffers) */
851
    rt->last_reply[0] = '\0';
852
    for (;;) {
853
        q = buf;
854
        for (;;) {
855
            ret = url_read_complete(rt->rtsp_hd, &ch, 1);
856
#ifdef DEBUG_RTP_TCP
857
            av_dlog(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
858
#endif
859
            if (ret != 1)
860
                return AVERROR_EOF;
861
            if (ch == '\n')
862
                break;
863
            if (ch == '$') {
864
                /* XXX: only parse it if first char on line ? */
865
                if (return_on_interleaved_data) {
866
                    return 1;
867
                } else
868
                    ff_rtsp_skip_packet(s);
869
            } else if (ch != '\r') {
870
                if ((q - buf) < sizeof(buf) - 1)
871
                    *q++ = ch;
872
            }
873
        }
874
        *q = '\0';
875

    
876
        av_dlog(s, "line='%s'\n", buf);
877

    
878
        /* test if last line */
879
        if (buf[0] == '\0')
880
            break;
881
        p = buf;
882
        if (line_count == 0) {
883
            /* get reply code */
884
            get_word(buf1, sizeof(buf1), &p);
885
            get_word(buf1, sizeof(buf1), &p);
886
            reply->status_code = atoi(buf1);
887
            av_strlcpy(reply->reason, p, sizeof(reply->reason));
888
        } else {
889
            ff_rtsp_parse_line(reply, p, rt, method);
890
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
891
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
892
        }
893
        line_count++;
894
    }
895

    
896
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
897
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
898

    
899
    content_length = reply->content_length;
900
    if (content_length > 0) {
901
        /* leave some room for a trailing '\0' (useful for simple parsing) */
902
        content = av_malloc(content_length + 1);
903
        (void)url_read_complete(rt->rtsp_hd, content, content_length);
904
        content[content_length] = '\0';
905
    }
906
    if (content_ptr)
907
        *content_ptr = content;
908
    else
909
        av_free(content);
910

    
911
    if (rt->seq != reply->seq) {
912
        av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
913
            rt->seq, reply->seq);
914
    }
915

    
916
    /* EOS */
917
    if (reply->notice == 2101 /* End-of-Stream Reached */      ||
918
        reply->notice == 2104 /* Start-of-Stream Reached */    ||
919
        reply->notice == 2306 /* Continuous Feed Terminated */) {
920
        rt->state = RTSP_STATE_IDLE;
921
    } else if (reply->notice >= 4400 && reply->notice < 5500) {
922
        return AVERROR(EIO); /* data or server error */
923
    } else if (reply->notice == 2401 /* Ticket Expired */ ||
924
             (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
925
        return AVERROR(EPERM);
926

    
927
    return 0;
928
}
929

    
930
/**
931
 * Send a command to the RTSP server without waiting for the reply.
932
 *
933
 * @param s RTSP (de)muxer context
934
 * @param method the method for the request
935
 * @param url the target url for the request
936
 * @param headers extra header lines to include in the request
937
 * @param send_content if non-null, the data to send as request body content
938
 * @param send_content_length the length of the send_content data, or 0 if
939
 *                            send_content is null
940
 *
941
 * @return zero if success, nonzero otherwise
942
 */
943
static int ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
944
                                               const char *method, const char *url,
945
                                               const char *headers,
946
                                               const unsigned char *send_content,
947
                                               int send_content_length)
948
{
949
    RTSPState *rt = s->priv_data;
950
    char buf[4096], *out_buf;
951
    char base64buf[AV_BASE64_SIZE(sizeof(buf))];
952

    
953
    /* Add in RTSP headers */
954
    out_buf = buf;
955
    rt->seq++;
956
    snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
957
    if (headers)
958
        av_strlcat(buf, headers, sizeof(buf));
959
    av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
960
    if (rt->session_id[0] != '\0' && (!headers ||
961
        !strstr(headers, "\nIf-Match:"))) {
962
        av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
963
    }
964
    if (rt->auth[0]) {
965
        char *str = ff_http_auth_create_response(&rt->auth_state,
966
                                                 rt->auth, url, method);
967
        if (str)
968
            av_strlcat(buf, str, sizeof(buf));
969
        av_free(str);
970
    }
971
    if (send_content_length > 0 && send_content)
972
        av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
973
    av_strlcat(buf, "\r\n", sizeof(buf));
974

    
975
    /* base64 encode rtsp if tunneling */
976
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
977
        av_base64_encode(base64buf, sizeof(base64buf), buf, strlen(buf));
978
        out_buf = base64buf;
979
    }
980

    
981
    av_dlog(s, "Sending:\n%s--\n", buf);
982

    
983
    url_write(rt->rtsp_hd_out, out_buf, strlen(out_buf));
984
    if (send_content_length > 0 && send_content) {
985
        if (rt->control_transport == RTSP_MODE_TUNNEL) {
986
            av_log(s, AV_LOG_ERROR, "tunneling of RTSP requests "
987
                                    "with content data not supported\n");
988
            return AVERROR_PATCHWELCOME;
989
        }
990
        url_write(rt->rtsp_hd_out, send_content, send_content_length);
991
    }
992
    rt->last_cmd_time = av_gettime();
993

    
994
    return 0;
995
}
996

    
997
int ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
998
                           const char *url, const char *headers)
999
{
1000
    return ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1001
}
1002

    
1003
int ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1004
                     const char *headers, RTSPMessageHeader *reply,
1005
                     unsigned char **content_ptr)
1006
{
1007
    return ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1008
                                         content_ptr, NULL, 0);
1009
}
1010

    
1011
int ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1012
                                  const char *method, const char *url,
1013
                                  const char *header,
1014
                                  RTSPMessageHeader *reply,
1015
                                  unsigned char **content_ptr,
1016
                                  const unsigned char *send_content,
1017
                                  int send_content_length)
1018
{
1019
    RTSPState *rt = s->priv_data;
1020
    HTTPAuthType cur_auth_type;
1021
    int ret;
1022

    
1023
retry:
1024
    cur_auth_type = rt->auth_state.auth_type;
1025
    if ((ret = ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1026
                                                   send_content,
1027
                                                   send_content_length)))
1028
        return ret;
1029

    
1030
    if ((ret = ff_rtsp_read_reply(s, reply, content_ptr, 0, method) ) < 0)
1031
        return ret;
1032

    
1033
    if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1034
        rt->auth_state.auth_type != HTTP_AUTH_NONE)
1035
        goto retry;
1036

    
1037
    if (reply->status_code > 400){
1038
        av_log(s, AV_LOG_ERROR, "method %s failed: %d%s\n",
1039
               method,
1040
               reply->status_code,
1041
               reply->reason);
1042
        av_log(s, AV_LOG_DEBUG, "%s\n", rt->last_reply);
1043
    }
1044

    
1045
    return 0;
1046
}
1047

    
1048
/**
1049
 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
1050
 */
1051
int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
1052
                              int lower_transport, const char *real_challenge)
1053
{
1054
    RTSPState *rt = s->priv_data;
1055
    int rtx, j, i, err, interleave = 0;
1056
    RTSPStream *rtsp_st;
1057
    RTSPMessageHeader reply1, *reply = &reply1;
1058
    char cmd[2048];
1059
    const char *trans_pref;
1060

    
1061
    if (rt->transport == RTSP_TRANSPORT_RDT)
1062
        trans_pref = "x-pn-tng";
1063
    else
1064
        trans_pref = "RTP/AVP";
1065

    
1066
    /* default timeout: 1 minute */
1067
    rt->timeout = 60;
1068

    
1069
    /* for each stream, make the setup request */
1070
    /* XXX: we assume the same server is used for the control of each
1071
     * RTSP stream */
1072

    
1073
    for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1074
        char transport[2048];
1075

    
1076
        /**
1077
         * WMS serves all UDP data over a single connection, the RTX, which
1078
         * isn't necessarily the first in the SDP but has to be the first
1079
         * to be set up, else the second/third SETUP will fail with a 461.
1080
         */
1081
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1082
             rt->server_type == RTSP_SERVER_WMS) {
1083
            if (i == 0) {
1084
                /* rtx first */
1085
                for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1086
                    int len = strlen(rt->rtsp_streams[rtx]->control_url);
1087
                    if (len >= 4 &&
1088
                        !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1089
                                "/rtx"))
1090
                        break;
1091
                }
1092
                if (rtx == rt->nb_rtsp_streams)
1093
                    return -1; /* no RTX found */
1094
                rtsp_st = rt->rtsp_streams[rtx];
1095
            } else
1096
                rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1097
        } else
1098
            rtsp_st = rt->rtsp_streams[i];
1099

    
1100
        /* RTP/UDP */
1101
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1102
            char buf[256];
1103

    
1104
            if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1105
                port = reply->transports[0].client_port_min;
1106
                goto have_port;
1107
            }
1108

    
1109
            /* first try in specified port range */
1110
            if (RTSP_RTP_PORT_MIN != 0) {
1111
                while (j <= RTSP_RTP_PORT_MAX) {
1112
                    ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1113
                                "?localport=%d", j);
1114
                    /* we will use two ports per rtp stream (rtp and rtcp) */
1115
                    j += 2;
1116
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1117
                        goto rtp_opened;
1118
                }
1119
            }
1120

    
1121
#if 0
1122
            /* then try on any port */
1123
            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1124
                err = AVERROR_INVALIDDATA;
1125
                goto fail;
1126
            }
1127
#else
1128
            av_log(s, AV_LOG_ERROR, "Unable to open an input RTP port\n");
1129
            err = AVERROR(EIO);
1130
            goto fail;
1131
#endif
1132

    
1133
        rtp_opened:
1134
            port = rtp_get_local_rtp_port(rtsp_st->rtp_handle);
1135
        have_port:
1136
            snprintf(transport, sizeof(transport) - 1,
1137
                     "%s/UDP;", trans_pref);
1138
            if (rt->server_type != RTSP_SERVER_REAL)
1139
                av_strlcat(transport, "unicast;", sizeof(transport));
1140
            av_strlcatf(transport, sizeof(transport),
1141
                     "client_port=%d", port);
1142
            if (rt->transport == RTSP_TRANSPORT_RTP &&
1143
                !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1144
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1145
        }
1146

    
1147
        /* RTP/TCP */
1148
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1149
            /** For WMS streams, the application streams are only used for
1150
             * UDP. When trying to set it up for TCP streams, the server
1151
             * will return an error. Therefore, we skip those streams. */
1152
            if (rt->server_type == RTSP_SERVER_WMS &&
1153
                s->streams[rtsp_st->stream_index]->codec->codec_type ==
1154
                    AVMEDIA_TYPE_DATA)
1155
                continue;
1156
            snprintf(transport, sizeof(transport) - 1,
1157
                     "%s/TCP;", trans_pref);
1158
            if (rt->server_type == RTSP_SERVER_WMS)
1159
                av_strlcat(transport, "unicast;", sizeof(transport));
1160
            av_strlcatf(transport, sizeof(transport),
1161
                        "interleaved=%d-%d",
1162
                        interleave, interleave + 1);
1163
            interleave += 2;
1164
        }
1165

    
1166
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1167
            snprintf(transport, sizeof(transport) - 1,
1168
                     "%s/UDP;multicast", trans_pref);
1169
        }
1170
        if (s->oformat) {
1171
            av_strlcat(transport, ";mode=receive", sizeof(transport));
1172
        } else if (rt->server_type == RTSP_SERVER_REAL ||
1173
                   rt->server_type == RTSP_SERVER_WMS)
1174
            av_strlcat(transport, ";mode=play", sizeof(transport));
1175
        snprintf(cmd, sizeof(cmd),
1176
                 "Transport: %s\r\n",
1177
                 transport);
1178
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL && CONFIG_RTPDEC) {
1179
            char real_res[41], real_csum[9];
1180
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
1181
                                              real_challenge);
1182
            av_strlcatf(cmd, sizeof(cmd),
1183
                        "If-Match: %s\r\n"
1184
                        "RealChallenge2: %s, sd=%s\r\n",
1185
                        rt->session_id, real_res, real_csum);
1186
        }
1187
        ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1188
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1189
            err = 1;
1190
            goto fail;
1191
        } else if (reply->status_code != RTSP_STATUS_OK ||
1192
                   reply->nb_transports != 1) {
1193
            err = AVERROR_INVALIDDATA;
1194
            goto fail;
1195
        }
1196

    
1197
        /* XXX: same protocol for all streams is required */
1198
        if (i > 0) {
1199
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1200
                reply->transports[0].transport != rt->transport) {
1201
                err = AVERROR_INVALIDDATA;
1202
                goto fail;
1203
            }
1204
        } else {
1205
            rt->lower_transport = reply->transports[0].lower_transport;
1206
            rt->transport = reply->transports[0].transport;
1207
        }
1208

    
1209
        /* Fail if the server responded with another lower transport mode
1210
         * than what we requested. */
1211
        if (reply->transports[0].lower_transport != lower_transport) {
1212
            av_log(s, AV_LOG_ERROR, "Nonmatching transport in server reply\n");
1213
            err = AVERROR_INVALIDDATA;
1214
            goto fail;
1215
        }
1216

    
1217
        switch(reply->transports[0].lower_transport) {
1218
        case RTSP_LOWER_TRANSPORT_TCP:
1219
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1220
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1221
            break;
1222

    
1223
        case RTSP_LOWER_TRANSPORT_UDP: {
1224
            char url[1024], options[30] = "";
1225

    
1226
            if (rt->filter_source)
1227
                av_strlcpy(options, "?connect=1", sizeof(options));
1228
            /* Use source address if specified */
1229
            if (reply->transports[0].source[0]) {
1230
                ff_url_join(url, sizeof(url), "rtp", NULL,
1231
                            reply->transports[0].source,
1232
                            reply->transports[0].server_port_min, options);
1233
            } else {
1234
                ff_url_join(url, sizeof(url), "rtp", NULL, host,
1235
                            reply->transports[0].server_port_min, options);
1236
            }
1237
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1238
                rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1239
                err = AVERROR_INVALIDDATA;
1240
                goto fail;
1241
            }
1242
            /* Try to initialize the connection state in a
1243
             * potential NAT router by sending dummy packets.
1244
             * RTP/RTCP dummy packets are used for RDT, too.
1245
             */
1246
            if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat &&
1247
                CONFIG_RTPDEC)
1248
                rtp_send_punch_packets(rtsp_st->rtp_handle);
1249
            break;
1250
        }
1251
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1252
            char url[1024], namebuf[50];
1253
            struct sockaddr_storage addr;
1254
            int port, ttl;
1255

    
1256
            if (reply->transports[0].destination.ss_family) {
1257
                addr      = reply->transports[0].destination;
1258
                port      = reply->transports[0].port_min;
1259
                ttl       = reply->transports[0].ttl;
1260
            } else {
1261
                addr      = rtsp_st->sdp_ip;
1262
                port      = rtsp_st->sdp_port;
1263
                ttl       = rtsp_st->sdp_ttl;
1264
            }
1265
            getnameinfo((struct sockaddr*) &addr, sizeof(addr),
1266
                        namebuf, sizeof(namebuf), NULL, 0, NI_NUMERICHOST);
1267
            ff_url_join(url, sizeof(url), "rtp", NULL, namebuf,
1268
                        port, "?ttl=%d", ttl);
1269
            if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1270
                err = AVERROR_INVALIDDATA;
1271
                goto fail;
1272
            }
1273
            break;
1274
        }
1275
        }
1276

    
1277
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1278
            goto fail;
1279
    }
1280

    
1281
    if (reply->timeout > 0)
1282
        rt->timeout = reply->timeout;
1283

    
1284
    if (rt->server_type == RTSP_SERVER_REAL)
1285
        rt->need_subscription = 1;
1286

    
1287
    return 0;
1288

    
1289
fail:
1290
    ff_rtsp_undo_setup(s);
1291
    return err;
1292
}
1293

    
1294
void ff_rtsp_close_connections(AVFormatContext *s)
1295
{
1296
    RTSPState *rt = s->priv_data;
1297
    if (rt->rtsp_hd_out != rt->rtsp_hd) url_close(rt->rtsp_hd_out);
1298
    url_close(rt->rtsp_hd);
1299
    rt->rtsp_hd = rt->rtsp_hd_out = NULL;
1300
}
1301

    
1302
int ff_rtsp_connect(AVFormatContext *s)
1303
{
1304
    RTSPState *rt = s->priv_data;
1305
    char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1306
    char *option_list, *option, *filename;
1307
    int port, err, tcp_fd;
1308
    RTSPMessageHeader reply1 = {0}, *reply = &reply1;
1309
    int lower_transport_mask = 0;
1310
    char real_challenge[64] = "";
1311
    struct sockaddr_storage peer;
1312
    socklen_t peer_len = sizeof(peer);
1313

    
1314
    if (!ff_network_init())
1315
        return AVERROR(EIO);
1316
redirect:
1317
    rt->control_transport = RTSP_MODE_PLAIN;
1318
    /* extract hostname and port */
1319
    av_url_split(NULL, 0, auth, sizeof(auth),
1320
                 host, sizeof(host), &port, path, sizeof(path), s->filename);
1321
    if (*auth) {
1322
        av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1323
    }
1324
    if (port < 0)
1325
        port = RTSP_DEFAULT_PORT;
1326

    
1327
    /* search for options */
1328
    option_list = strrchr(path, '?');
1329
    if (option_list) {
1330
        /* Strip out the RTSP specific options, write out the rest of
1331
         * the options back into the same string. */
1332
        filename = option_list;
1333
        while (option_list) {
1334
            /* move the option pointer */
1335
            option = ++option_list;
1336
            option_list = strchr(option_list, '&');
1337
            if (option_list)
1338
                *option_list = 0;
1339

    
1340
            /* handle the options */
1341
            if (!strcmp(option, "udp")) {
1342
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1343
            } else if (!strcmp(option, "multicast")) {
1344
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1345
            } else if (!strcmp(option, "tcp")) {
1346
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1347
            } else if(!strcmp(option, "http")) {
1348
                lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1349
                rt->control_transport = RTSP_MODE_TUNNEL;
1350
            } else if (!strcmp(option, "filter_src")) {
1351
                rt->filter_source = 1;
1352
            } else {
1353
                /* Write options back into the buffer, using memmove instead
1354
                 * of strcpy since the strings may overlap. */
1355
                int len = strlen(option);
1356
                memmove(++filename, option, len);
1357
                filename += len;
1358
                if (option_list) *filename = '&';
1359
            }
1360
        }
1361
        *filename = 0;
1362
    }
1363

    
1364
    if (!lower_transport_mask)
1365
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1366

    
1367
    if (s->oformat) {
1368
        /* Only UDP or TCP - UDP multicast isn't supported. */
1369
        lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1370
                                (1 << RTSP_LOWER_TRANSPORT_TCP);
1371
        if (!lower_transport_mask || rt->control_transport == RTSP_MODE_TUNNEL) {
1372
            av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1373
                                    "only UDP and TCP are supported for output.\n");
1374
            err = AVERROR(EINVAL);
1375
            goto fail;
1376
        }
1377
    }
1378

    
1379
    /* Construct the URI used in request; this is similar to s->filename,
1380
     * but with authentication credentials removed and RTSP specific options
1381
     * stripped out. */
1382
    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1383
                host, port, "%s", path);
1384

    
1385
    if (rt->control_transport == RTSP_MODE_TUNNEL) {
1386
        /* set up initial handshake for tunneling */
1387
        char httpname[1024];
1388
        char sessioncookie[17];
1389
        char headers[1024];
1390

    
1391
        ff_url_join(httpname, sizeof(httpname), "http", auth, host, port, "%s", path);
1392
        snprintf(sessioncookie, sizeof(sessioncookie), "%08x%08x",
1393
                 av_get_random_seed(), av_get_random_seed());
1394

    
1395
        /* GET requests */
1396
        if (url_alloc(&rt->rtsp_hd, httpname, URL_RDONLY) < 0) {
1397
            err = AVERROR(EIO);
1398
            goto fail;
1399
        }
1400

    
1401
        /* generate GET headers */
1402
        snprintf(headers, sizeof(headers),
1403
                 "x-sessioncookie: %s\r\n"
1404
                 "Accept: application/x-rtsp-tunnelled\r\n"
1405
                 "Pragma: no-cache\r\n"
1406
                 "Cache-Control: no-cache\r\n",
1407
                 sessioncookie);
1408
        ff_http_set_headers(rt->rtsp_hd, headers);
1409

    
1410
        /* complete the connection */
1411
        if (url_connect(rt->rtsp_hd)) {
1412
            err = AVERROR(EIO);
1413
            goto fail;
1414
        }
1415

    
1416
        /* POST requests */
1417
        if (url_alloc(&rt->rtsp_hd_out, httpname, URL_WRONLY) < 0 ) {
1418
            err = AVERROR(EIO);
1419
            goto fail;
1420
        }
1421

    
1422
        /* generate POST headers */
1423
        snprintf(headers, sizeof(headers),
1424
                 "x-sessioncookie: %s\r\n"
1425
                 "Content-Type: application/x-rtsp-tunnelled\r\n"
1426
                 "Pragma: no-cache\r\n"
1427
                 "Cache-Control: no-cache\r\n"
1428
                 "Content-Length: 32767\r\n"
1429
                 "Expires: Sun, 9 Jan 1972 00:00:00 GMT\r\n",
1430
                 sessioncookie);
1431
        ff_http_set_headers(rt->rtsp_hd_out, headers);
1432
        ff_http_set_chunked_transfer_encoding(rt->rtsp_hd_out, 0);
1433

    
1434
        /* Initialize the authentication state for the POST session. The HTTP
1435
         * protocol implementation doesn't properly handle multi-pass
1436
         * authentication for POST requests, since it would require one of
1437
         * the following:
1438
         * - implementing Expect: 100-continue, which many HTTP servers
1439
         *   don't support anyway, even less the RTSP servers that do HTTP
1440
         *   tunneling
1441
         * - sending the whole POST data until getting a 401 reply specifying
1442
         *   what authentication method to use, then resending all that data
1443
         * - waiting for potential 401 replies directly after sending the
1444
         *   POST header (waiting for some unspecified time)
1445
         * Therefore, we copy the full auth state, which works for both basic
1446
         * and digest. (For digest, we would have to synchronize the nonce
1447
         * count variable between the two sessions, if we'd do more requests
1448
         * with the original session, though.)
1449
         */
1450
        ff_http_init_auth_state(rt->rtsp_hd_out, rt->rtsp_hd);
1451

    
1452
        /* complete the connection */
1453
        if (url_connect(rt->rtsp_hd_out)) {
1454
            err = AVERROR(EIO);
1455
            goto fail;
1456
        }
1457
    } else {
1458
        /* open the tcp connection */
1459
        ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1460
        if (url_open(&rt->rtsp_hd, tcpname, URL_RDWR) < 0) {
1461
            err = AVERROR(EIO);
1462
            goto fail;
1463
        }
1464
        rt->rtsp_hd_out = rt->rtsp_hd;
1465
    }
1466
    rt->seq = 0;
1467

    
1468
    tcp_fd = url_get_file_handle(rt->rtsp_hd);
1469
    if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1470
        getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1471
                    NULL, 0, NI_NUMERICHOST);
1472
    }
1473

    
1474
    /* request options supported by the server; this also detects server
1475
     * type */
1476
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1477
        cmd[0] = 0;
1478
        if (rt->server_type == RTSP_SERVER_REAL)
1479
            av_strlcat(cmd,
1480
                       /**
1481
                        * The following entries are required for proper
1482
                        * streaming from a Realmedia server. They are
1483
                        * interdependent in some way although we currently
1484
                        * don't quite understand how. Values were copied
1485
                        * from mplayer SVN r23589.
1486
                        * @param CompanyID is a 16-byte ID in base64
1487
                        * @param ClientChallenge is a 16-byte ID in hex
1488
                        */
1489
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1490
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1491
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1492
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1493
                       sizeof(cmd));
1494
        ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1495
        if (reply->status_code != RTSP_STATUS_OK) {
1496
            err = AVERROR_INVALIDDATA;
1497
            goto fail;
1498
        }
1499

    
1500
        /* detect server type if not standard-compliant RTP */
1501
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1502
            rt->server_type = RTSP_SERVER_REAL;
1503
            continue;
1504
        } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1505
            rt->server_type = RTSP_SERVER_WMS;
1506
        } else if (rt->server_type == RTSP_SERVER_REAL)
1507
            strcpy(real_challenge, reply->real_challenge);
1508
        break;
1509
    }
1510

    
1511
    if (s->iformat && CONFIG_RTSP_DEMUXER)
1512
        err = ff_rtsp_setup_input_streams(s, reply);
1513
    else if (CONFIG_RTSP_MUXER)
1514
        err = ff_rtsp_setup_output_streams(s, host);
1515
    if (err)
1516
        goto fail;
1517

    
1518
    do {
1519
        int lower_transport = ff_log2_tab[lower_transport_mask &
1520
                                  ~(lower_transport_mask - 1)];
1521

    
1522
        err = ff_rtsp_make_setup_request(s, host, port, lower_transport,
1523
                                 rt->server_type == RTSP_SERVER_REAL ?
1524
                                     real_challenge : NULL);
1525
        if (err < 0)
1526
            goto fail;
1527
        lower_transport_mask &= ~(1 << lower_transport);
1528
        if (lower_transport_mask == 0 && err == 1) {
1529
            err = FF_NETERROR(EPROTONOSUPPORT);
1530
            goto fail;
1531
        }
1532
    } while (err);
1533

    
1534
    rt->lower_transport_mask = lower_transport_mask;
1535
    av_strlcpy(rt->real_challenge, real_challenge, sizeof(rt->real_challenge));
1536
    rt->state = RTSP_STATE_IDLE;
1537
    rt->seek_timestamp = 0; /* default is to start stream at position zero */
1538
    return 0;
1539
 fail:
1540
    ff_rtsp_close_streams(s);
1541
    ff_rtsp_close_connections(s);
1542
    if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1543
        av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1544
        av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1545
               reply->status_code,
1546
               s->filename);
1547
        goto redirect;
1548
    }
1549
    ff_network_close();
1550
    return err;
1551
}
1552
#endif /* CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER */
1553

    
1554
#if CONFIG_RTPDEC
1555
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1556
                           uint8_t *buf, int buf_size, int64_t wait_end)
1557
{
1558
    RTSPState *rt = s->priv_data;
1559
    RTSPStream *rtsp_st;
1560
    int n, i, ret, tcp_fd, timeout_cnt = 0;
1561
    int max_p = 0;
1562
    struct pollfd *p = rt->p;
1563

    
1564
    for (;;) {
1565
        if (url_interrupt_cb())
1566
            return AVERROR(EINTR);
1567
        if (wait_end && wait_end - av_gettime() < 0)
1568
            return AVERROR(EAGAIN);
1569
        max_p = 0;
1570
        if (rt->rtsp_hd) {
1571
            tcp_fd = url_get_file_handle(rt->rtsp_hd);
1572
            p[max_p].fd = tcp_fd;
1573
            p[max_p++].events = POLLIN;
1574
        } else {
1575
            tcp_fd = -1;
1576
        }
1577
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1578
            rtsp_st = rt->rtsp_streams[i];
1579
            if (rtsp_st->rtp_handle) {
1580
                p[max_p].fd = url_get_file_handle(rtsp_st->rtp_handle);
1581
                p[max_p++].events = POLLIN;
1582
                p[max_p].fd = rtp_get_rtcp_file_handle(rtsp_st->rtp_handle);
1583
                p[max_p++].events = POLLIN;
1584
            }
1585
        }
1586
        n = poll(p, max_p, POLL_TIMEOUT_MS);
1587
        if (n > 0) {
1588
            int j = 1 - (tcp_fd == -1);
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
                    if (p[j].revents & POLLIN || p[j+1].revents & POLLIN) {
1594
                        ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1595
                        if (ret > 0) {
1596
                            *prtsp_st = rtsp_st;
1597
                            return ret;
1598
                        }
1599
                    }
1600
                    j+=2;
1601
                }
1602
            }
1603
#if CONFIG_RTSP_DEMUXER
1604
            if (tcp_fd != -1 && p[0].revents & POLLIN) {
1605
                RTSPMessageHeader reply;
1606

    
1607
                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
1608
                if (ret < 0)
1609
                    return ret;
1610
                /* XXX: parse message */
1611
                if (rt->state != RTSP_STATE_STREAMING)
1612
                    return 0;
1613
            }
1614
#endif
1615
        } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
1616
            return FF_NETERROR(ETIMEDOUT);
1617
        } else if (n < 0 && errno != EINTR)
1618
            return AVERROR(errno);
1619
    }
1620
}
1621

    
1622
int ff_rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1623
{
1624
    RTSPState *rt = s->priv_data;
1625
    int ret, len;
1626
    RTSPStream *rtsp_st, *first_queue_st = NULL;
1627
    int64_t wait_end = 0;
1628

    
1629
    if (rt->nb_byes == rt->nb_rtsp_streams)
1630
        return AVERROR_EOF;
1631

    
1632
    /* get next frames from the same RTP packet */
1633
    if (rt->cur_transport_priv) {
1634
        if (rt->transport == RTSP_TRANSPORT_RDT) {
1635
            ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1636
        } else
1637
            ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1638
        if (ret == 0) {
1639
            rt->cur_transport_priv = NULL;
1640
            return 0;
1641
        } else if (ret == 1) {
1642
            return 0;
1643
        } else
1644
            rt->cur_transport_priv = NULL;
1645
    }
1646

    
1647
    if (rt->transport == RTSP_TRANSPORT_RTP) {
1648
        int i;
1649
        int64_t first_queue_time = 0;
1650
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1651
            RTPDemuxContext *rtpctx = rt->rtsp_streams[i]->transport_priv;
1652
            int64_t queue_time;
1653
            if (!rtpctx)
1654
                continue;
1655
            queue_time = ff_rtp_queued_packet_time(rtpctx);
1656
            if (queue_time && (queue_time - first_queue_time < 0 ||
1657
                               !first_queue_time)) {
1658
                first_queue_time = queue_time;
1659
                first_queue_st   = rt->rtsp_streams[i];
1660
            }
1661
        }
1662
        if (first_queue_time)
1663
            wait_end = first_queue_time + s->max_delay;
1664
    }
1665

    
1666
    /* read next RTP packet */
1667
 redo:
1668
    if (!rt->recvbuf) {
1669
        rt->recvbuf = av_malloc(RECVBUF_SIZE);
1670
        if (!rt->recvbuf)
1671
            return AVERROR(ENOMEM);
1672
    }
1673

    
1674
    switch(rt->lower_transport) {
1675
    default:
1676
#if CONFIG_RTSP_DEMUXER
1677
    case RTSP_LOWER_TRANSPORT_TCP:
1678
        len = ff_rtsp_tcp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE);
1679
        break;
1680
#endif
1681
    case RTSP_LOWER_TRANSPORT_UDP:
1682
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1683
        len = udp_read_packet(s, &rtsp_st, rt->recvbuf, RECVBUF_SIZE, wait_end);
1684
        if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1685
            rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1686
        break;
1687
    }
1688
    if (len == AVERROR(EAGAIN) && first_queue_st &&
1689
        rt->transport == RTSP_TRANSPORT_RTP) {
1690
        rtsp_st = first_queue_st;
1691
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, NULL, 0);
1692
        goto end;
1693
    }
1694
    if (len < 0)
1695
        return len;
1696
    if (len == 0)
1697
        return AVERROR_EOF;
1698
    if (rt->transport == RTSP_TRANSPORT_RDT) {
1699
        ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1700
    } else {
1701
        ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, &rt->recvbuf, len);
1702
        if (ret < 0) {
1703
            /* Either bad packet, or a RTCP packet. Check if the
1704
             * first_rtcp_ntp_time field was initialized. */
1705
            RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1706
            if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1707
                /* first_rtcp_ntp_time has been initialized for this stream,
1708
                 * copy the same value to all other uninitialized streams,
1709
                 * in order to map their timestamp origin to the same ntp time
1710
                 * as this one. */
1711
                int i;
1712
                AVStream *st = NULL;
1713
                if (rtsp_st->stream_index >= 0)
1714
                    st = s->streams[rtsp_st->stream_index];
1715
                for (i = 0; i < rt->nb_rtsp_streams; i++) {
1716
                    RTPDemuxContext *rtpctx2 = rt->rtsp_streams[i]->transport_priv;
1717
                    AVStream *st2 = NULL;
1718
                    if (rt->rtsp_streams[i]->stream_index >= 0)
1719
                        st2 = s->streams[rt->rtsp_streams[i]->stream_index];
1720
                    if (rtpctx2 && st && st2 &&
1721
                        rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE) {
1722
                        rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1723
                        rtpctx2->rtcp_ts_offset = av_rescale_q(
1724
                            rtpctx->rtcp_ts_offset, st->time_base,
1725
                            st2->time_base);
1726
                    }
1727
                }
1728
            }
1729
            if (ret == -RTCP_BYE) {
1730
                rt->nb_byes++;
1731

    
1732
                av_log(s, AV_LOG_DEBUG, "Received BYE for stream %d (%d/%d)\n",
1733
                       rtsp_st->stream_index, rt->nb_byes, rt->nb_rtsp_streams);
1734

    
1735
                if (rt->nb_byes == rt->nb_rtsp_streams)
1736
                    return AVERROR_EOF;
1737
            }
1738
        }
1739
    }
1740
end:
1741
    if (ret < 0)
1742
        goto redo;
1743
    if (ret == 1)
1744
        /* more packets may follow, so we save the RTP context */
1745
        rt->cur_transport_priv = rtsp_st->transport_priv;
1746

    
1747
    return ret;
1748
}
1749
#endif /* CONFIG_RTPDEC */
1750

    
1751
#if CONFIG_SDP_DEMUXER
1752
static int sdp_probe(AVProbeData *p1)
1753
{
1754
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1755

    
1756
    /* we look for a line beginning "c=IN IP" */
1757
    while (p < p_end && *p != '\0') {
1758
        if (p + sizeof("c=IN IP") - 1 < p_end &&
1759
            av_strstart(p, "c=IN IP", NULL))
1760
            return AVPROBE_SCORE_MAX / 2;
1761

    
1762
        while (p < p_end - 1 && *p != '\n') p++;
1763
        if (++p >= p_end)
1764
            break;
1765
        if (*p == '\r')
1766
            p++;
1767
    }
1768
    return 0;
1769
}
1770

    
1771
static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1772
{
1773
    RTSPState *rt = s->priv_data;
1774
    RTSPStream *rtsp_st;
1775
    int size, i, err;
1776
    char *content;
1777
    char url[1024];
1778

    
1779
    if (!ff_network_init())
1780
        return AVERROR(EIO);
1781

    
1782
    /* read the whole sdp file */
1783
    /* XXX: better loading */
1784
    content = av_malloc(SDP_MAX_SIZE);
1785
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1786
    if (size <= 0) {
1787
        av_free(content);
1788
        return AVERROR_INVALIDDATA;
1789
    }
1790
    content[size] ='\0';
1791

    
1792
    err = ff_sdp_parse(s, content);
1793
    av_free(content);
1794
    if (err) goto fail;
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 ff_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 ff_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