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ffmpeg / libavformat / rtsp.c @ 5465b0d4

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1 1617ad97 Fabrice Bellard
/*
2 93ced3e8 Fabrice Bellard
 * RTSP/SDP client
3 1617ad97 Fabrice Bellard
 * Copyright (c) 2002 Fabrice Bellard.
4
 *
5 b78e7197 Diego Biurrun
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8 1617ad97 Fabrice Bellard
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10 b78e7197 Diego Biurrun
 * version 2.1 of the License, or (at your option) any later version.
11 1617ad97 Fabrice Bellard
 *
12 b78e7197 Diego Biurrun
 * FFmpeg is distributed in the hope that it will be useful,
13 1617ad97 Fabrice Bellard
 * 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.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18 b78e7197 Diego Biurrun
 * License along with FFmpeg; if not, write to the Free Software
19 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 1617ad97 Fabrice Bellard
 */
21 245976da Diego Biurrun
22 7246177d Aurelien Jacobs
/* needed by inet_aton() */
23
#define _SVID_SOURCE
24
25 245976da Diego Biurrun
#include "libavutil/avstring.h"
26 1617ad97 Fabrice Bellard
#include "avformat.h"
27
28 db0ed93e Marc Hoffman
#include <sys/time.h>
29 6ad1c9c9 Baptiste Coudurier
#ifdef HAVE_SYS_SELECT_H
30 933bd8e2 Baptiste Coudurier
#include <sys/select.h>
31 6ad1c9c9 Baptiste Coudurier
#endif
32 ea452b54 Aurelien Jacobs
#include <strings.h>
33 42572ef5 Ramiro Polla
#include "network.h"
34 c971ff19 Luca Abeni
#include "rtsp.h"
35 1617ad97 Fabrice Bellard
36 4934884a Ryan Martell
#include "rtp_internal.h"
37 e9dea59f Ronald S. Bultje
#include "rdt.h"
38 4934884a Ryan Martell
39 1617ad97 Fabrice Bellard
//#define DEBUG
40 b6892136 Fabrice Bellard
//#define DEBUG_RTP_TCP
41 1617ad97 Fabrice Bellard
42 ff762d6e Fabrice Bellard
enum RTSPClientState {
43
    RTSP_STATE_IDLE,
44
    RTSP_STATE_PLAYING,
45
    RTSP_STATE_PAUSED,
46
};
47
48 e0776043 Ronald S. Bultje
enum RTSPServerType {
49 2834c365 Ronald S. Bultje
    RTSP_SERVER_RTP,  /*< Standard-compliant RTP-server */
50 2e889ae4 Ronald S. Bultje
    RTSP_SERVER_REAL, /*< Realmedia-style server */
51 e0776043 Ronald S. Bultje
    RTSP_SERVER_LAST
52
};
53
54 119b4668 Ronald S. Bultje
enum RTSPTransport {
55
    RTSP_TRANSPORT_RTP,
56
    RTSP_TRANSPORT_RDT,
57
    RTSP_TRANSPORT_LAST
58
};
59
60 1617ad97 Fabrice Bellard
typedef struct RTSPState {
61
    URLContext *rtsp_hd; /* RTSP TCP connexion handle */
62 8b1ab7bf Fabrice Bellard
    int nb_rtsp_streams;
63
    struct RTSPStream **rtsp_streams;
64 115329f1 Diego Biurrun
65 ff762d6e Fabrice Bellard
    enum RTSPClientState state;
66
    int64_t seek_timestamp;
67 115329f1 Diego Biurrun
68 b6892136 Fabrice Bellard
    /* XXX: currently we use unbuffered input */
69
    //    ByteIOContext rtsp_gb;
70 1617ad97 Fabrice Bellard
    int seq;        /* RTSP command sequence number */
71
    char session_id[512];
72 119b4668 Ronald S. Bultje
    enum RTSPTransport transport;
73 90abbdba Ronald S. Bultje
    enum RTSPLowerTransport lower_transport;
74 e0776043 Ronald S. Bultje
    enum RTSPServerType server_type;
75 1617ad97 Fabrice Bellard
    char last_reply[2048]; /* XXX: allocate ? */
76 5465b0d4 Ronald S. Bultje
    void *cur_tx;
77 1256d16b Ronald S. Bultje
    int need_subscription;
78 1617ad97 Fabrice Bellard
} RTSPState;
79
80
typedef struct RTSPStream {
81 8b1ab7bf Fabrice Bellard
    URLContext *rtp_handle; /* RTP stream handle */
82 5465b0d4 Ronald S. Bultje
    void *tx_ctx; /* RTP/RDT parse context */
83 115329f1 Diego Biurrun
84 8b1ab7bf Fabrice Bellard
    int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
85 1617ad97 Fabrice Bellard
    int interleaved_min, interleaved_max;  /* interleave ids, if TCP transport */
86 93ced3e8 Fabrice Bellard
    char control_url[1024]; /* url for this stream (from SDP) */
87
88
    int sdp_port; /* port (from SDP content - not used in RTSP) */
89
    struct in_addr sdp_ip; /* IP address  (from SDP content - not used in RTSP) */
90
    int sdp_ttl;  /* IP TTL (from SDP content - not used in RTSP) */
91
    int sdp_payload_type; /* payload type - only used in SDP */
92 d1ccf0e0 Romain Degez
    rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
93 4934884a Ryan Martell
94
    RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
95 ed0aacc7 Ronald S. Bultje
    PayloadContext *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
96 1617ad97 Fabrice Bellard
} RTSPStream;
97
98 ff762d6e Fabrice Bellard
static int rtsp_read_play(AVFormatContext *s);
99
100 1617ad97 Fabrice Bellard
/* XXX: currently, the only way to change the protocols consists in
101
   changing this variable */
102
103 c482500f Ronald S. Bultje
#if LIBAVFORMAT_VERSION_INT < (53 << 16)
104 90abbdba Ronald S. Bultje
int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
105 c482500f Ronald S. Bultje
#endif
106 85fb7b34 Fabrice Bellard
107 1617ad97 Fabrice Bellard
static int rtsp_probe(AVProbeData *p)
108
{
109 f7d78f36 Måns Rullgård
    if (av_strstart(p->filename, "rtsp:", NULL))
110 1617ad97 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
111
    return 0;
112
}
113
114
static int redir_isspace(int c)
115
{
116 ccd425e7 Diego Biurrun
    return c == ' ' || c == '\t' || c == '\n' || c == '\r';
117 1617ad97 Fabrice Bellard
}
118
119
static void skip_spaces(const char **pp)
120
{
121
    const char *p;
122
    p = *pp;
123
    while (redir_isspace(*p))
124
        p++;
125
    *pp = p;
126
}
127
128 115329f1 Diego Biurrun
static void get_word_sep(char *buf, int buf_size, const char *sep,
129 1617ad97 Fabrice Bellard
                         const char **pp)
130
{
131
    const char *p;
132
    char *q;
133
134
    p = *pp;
135 d1ccf0e0 Romain Degez
    if (*p == '/')
136
        p++;
137 1617ad97 Fabrice Bellard
    skip_spaces(&p);
138
    q = buf;
139
    while (!strchr(sep, *p) && *p != '\0') {
140
        if ((q - buf) < buf_size - 1)
141
            *q++ = *p;
142
        p++;
143
    }
144
    if (buf_size > 0)
145
        *q = '\0';
146
    *pp = p;
147
}
148
149
static void get_word(char *buf, int buf_size, const char **pp)
150
{
151
    const char *p;
152
    char *q;
153
154
    p = *pp;
155
    skip_spaces(&p);
156
    q = buf;
157
    while (!redir_isspace(*p) && *p != '\0') {
158
        if ((q - buf) < buf_size - 1)
159
            *q++ = *p;
160
        p++;
161
    }
162
    if (buf_size > 0)
163
        *q = '\0';
164
    *pp = p;
165
}
166
167 93ced3e8 Fabrice Bellard
/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
168
   params>] */
169 4934884a Ryan Martell
static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
170 93ced3e8 Fabrice Bellard
{
171
    char buf[256];
172 d1ccf0e0 Romain Degez
    int i;
173
    AVCodec *c;
174 7b49ce2e Stefan Huehner
    const char *c_name;
175 93ced3e8 Fabrice Bellard
176 d1ccf0e0 Romain Degez
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
177
       see if we can handle this kind of payload */
178 93ced3e8 Fabrice Bellard
    get_word_sep(buf, sizeof(buf), "/", &p);
179 d1ccf0e0 Romain Degez
    if (payload_type >= RTP_PT_PRIVATE) {
180 4934884a Ryan Martell
        RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
181
        while(handler) {
182
            if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
183
                codec->codec_id = handler->codec_id;
184
                rtsp_st->dynamic_handler= handler;
185
                if(handler->open) {
186
                    rtsp_st->dynamic_protocol_context= handler->open();
187
                }
188 d1ccf0e0 Romain Degez
                break;
189
            }
190 4934884a Ryan Martell
            handler= handler->next;
191
        }
192 93ced3e8 Fabrice Bellard
    } else {
193 d1ccf0e0 Romain Degez
        /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
194
        /* search into AVRtpPayloadTypes[] */
195 7ed19d7f Luca Abeni
        codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
196 d1ccf0e0 Romain Degez
    }
197
198
    c = avcodec_find_decoder(codec->codec_id);
199
    if (c && c->name)
200 7b49ce2e Stefan Huehner
        c_name = c->name;
201 d1ccf0e0 Romain Degez
    else
202
        c_name = (char *)NULL;
203
204
    if (c_name) {
205
        get_word_sep(buf, sizeof(buf), "/", &p);
206
        i = atoi(buf);
207
        switch (codec->codec_type) {
208
            case CODEC_TYPE_AUDIO:
209
                av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
210
                codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
211
                codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
212
                if (i > 0) {
213
                    codec->sample_rate = i;
214
                    get_word_sep(buf, sizeof(buf), "/", &p);
215
                    i = atoi(buf);
216
                    if (i > 0)
217
                        codec->channels = i;
218 d0deedcb Ryan Martell
                    // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
219
                    //  frequency.  No problem, but the sample rate is being set here by the sdp line.  Upcoming patch forthcoming. (rdm)
220 d1ccf0e0 Romain Degez
                }
221
                av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
222
                av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
223
                break;
224
            case CODEC_TYPE_VIDEO:
225
                av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
226
                break;
227
            default:
228
                break;
229
        }
230
        return 0;
231 93ced3e8 Fabrice Bellard
    }
232 d1ccf0e0 Romain Degez
233
    return -1;
234 93ced3e8 Fabrice Bellard
}
235
236
/* return the length and optionnaly the data */
237
static int hex_to_data(uint8_t *data, const char *p)
238
{
239
    int c, len, v;
240
241
    len = 0;
242
    v = 1;
243
    for(;;) {
244
        skip_spaces(&p);
245
        if (p == '\0')
246
            break;
247
        c = toupper((unsigned char)*p++);
248
        if (c >= '0' && c <= '9')
249
            c = c - '0';
250
        else if (c >= 'A' && c <= 'F')
251
            c = c - 'A' + 10;
252
        else
253
            break;
254
        v = (v << 4) | c;
255
        if (v & 0x100) {
256
            if (data)
257
                data[len] = v;
258
            len++;
259
            v = 1;
260
        }
261
    }
262
    return len;
263
}
264
265 d1ccf0e0 Romain Degez
static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
266
{
267
    switch (codec->codec_id) {
268
        case CODEC_ID_MPEG4:
269 cbee7a69 Baptiste Coudurier
        case CODEC_ID_AAC:
270 d1ccf0e0 Romain Degez
            if (!strcmp(attr, "config")) {
271
                /* decode the hexa encoded parameter */
272
                int len = hex_to_data(NULL, value);
273
                codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
274
                if (!codec->extradata)
275
                    return;
276
                codec->extradata_size = len;
277
                hex_to_data(codec->extradata, value);
278
            }
279
            break;
280
        default:
281
            break;
282
    }
283
    return;
284
}
285
286
typedef struct attrname_map
287
{
288 7b49ce2e Stefan Huehner
    const char *str;
289 d1ccf0e0 Romain Degez
    uint16_t type;
290
    uint32_t offset;
291
} attrname_map_t;
292
293
/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
294
#define ATTR_NAME_TYPE_INT 0
295
#define ATTR_NAME_TYPE_STR 1
296 9b5ede5b Reimar Döffinger
static const attrname_map_t attr_names[]=
297 d1ccf0e0 Romain Degez
{
298
    {"SizeLength",       ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
299
    {"IndexLength",      ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
300
    {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
301
    {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
302
    {"StreamType",       ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
303
    {"mode",             ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
304
    {NULL, -1, -1},
305
};
306
307 d0deedcb Ryan Martell
/** parse the attribute line from the fmtp a line of an sdp resonse.  This is broken out as a function
308
* because it is used in rtp_h264.c, which is forthcoming.
309
*/
310
int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
311
{
312
    skip_spaces(p);
313
    if(**p)
314
    {
315
        get_word_sep(attr, attr_size, "=", p);
316
        if (**p == '=')
317
            (*p)++;
318
        get_word_sep(value, value_size, ";", p);
319
        if (**p == ';')
320
            (*p)++;
321
        return 1;
322
    }
323
    return 0;
324
}
325
326 d1ccf0e0 Romain Degez
/* parse a SDP line and save stream attributes */
327
static void sdp_parse_fmtp(AVStream *st, const char *p)
328 93ced3e8 Fabrice Bellard
{
329
    char attr[256];
330
    char value[4096];
331 d1ccf0e0 Romain Degez
    int i;
332
333
    RTSPStream *rtsp_st = st->priv_data;
334 01f4895c Michael Niedermayer
    AVCodecContext *codec = st->codec;
335 d1ccf0e0 Romain Degez
    rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
336 93ced3e8 Fabrice Bellard
337
    /* loop on each attribute */
338 1ad20f96 Ryan Martell
    while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
339
    {
340 bb270c08 Diego Biurrun
        /* grab the codec extra_data from the config parameter of the fmtp line */
341 d1ccf0e0 Romain Degez
        sdp_parse_fmtp_config(codec, attr, value);
342
        /* Looking for a known attribute */
343
        for (i = 0; attr_names[i].str; ++i) {
344
            if (!strcasecmp(attr, attr_names[i].str)) {
345
                if (attr_names[i].type == ATTR_NAME_TYPE_INT)
346
                    *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
347
                else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
348
                    *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
349 bb270c08 Diego Biurrun
            }
350 93ced3e8 Fabrice Bellard
        }
351
    }
352
}
353
354 31693e00 Ryan Martell
/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
355
 *  and end time.
356
 *  Used for seeking in the rtp stream.
357
 */
358
static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
359
{
360
    char buf[256];
361
362
    skip_spaces(&p);
363 f7d78f36 Måns Rullgård
    if (!av_stristart(p, "npt=", &p))
364 31693e00 Ryan Martell
        return;
365
366
    *start = AV_NOPTS_VALUE;
367
    *end = AV_NOPTS_VALUE;
368
369
    get_word_sep(buf, sizeof(buf), "-", &p);
370
    *start = parse_date(buf, 1);
371
    if (*p == '-') {
372
        p++;
373
        get_word_sep(buf, sizeof(buf), "-", &p);
374
        *end = parse_date(buf, 1);
375
    }
376
//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
377
//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
378
}
379
380 93ced3e8 Fabrice Bellard
typedef struct SDPParseState {
381
    /* SDP only */
382
    struct in_addr default_ip;
383
    int default_ttl;
384
} SDPParseState;
385
386
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
387 1617ad97 Fabrice Bellard
                           int letter, const char *buf)
388
{
389 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
390 1617ad97 Fabrice Bellard
    char buf1[64], st_type[64];
391
    const char *p;
392 fb65d2ca Diego Pettenò
    enum CodecType codec_type;
393
    int payload_type, i;
394 1617ad97 Fabrice Bellard
    AVStream *st;
395
    RTSPStream *rtsp_st;
396 93ced3e8 Fabrice Bellard
    struct in_addr sdp_ip;
397
    int ttl;
398
399 1617ad97 Fabrice Bellard
#ifdef DEBUG
400
    printf("sdp: %c='%s'\n", letter, buf);
401
#endif
402
403
    p = buf;
404
    switch(letter) {
405 93ced3e8 Fabrice Bellard
    case 'c':
406
        get_word(buf1, sizeof(buf1), &p);
407
        if (strcmp(buf1, "IN") != 0)
408
            return;
409
        get_word(buf1, sizeof(buf1), &p);
410
        if (strcmp(buf1, "IP4") != 0)
411
            return;
412
        get_word_sep(buf1, sizeof(buf1), "/", &p);
413
        if (inet_aton(buf1, &sdp_ip) == 0)
414
            return;
415
        ttl = 16;
416
        if (*p == '/') {
417
            p++;
418
            get_word_sep(buf1, sizeof(buf1), "/", &p);
419
            ttl = atoi(buf1);
420
        }
421
        if (s->nb_streams == 0) {
422
            s1->default_ip = sdp_ip;
423
            s1->default_ttl = ttl;
424
        } else {
425
            st = s->streams[s->nb_streams - 1];
426
            rtsp_st = st->priv_data;
427
            rtsp_st->sdp_ip = sdp_ip;
428
            rtsp_st->sdp_ttl = ttl;
429
        }
430
        break;
431 1617ad97 Fabrice Bellard
    case 's':
432 75e61b0e Måns Rullgård
        av_strlcpy(s->title, p, sizeof(s->title));
433 1617ad97 Fabrice Bellard
        break;
434
    case 'i':
435
        if (s->nb_streams == 0) {
436 75e61b0e Måns Rullgård
            av_strlcpy(s->comment, p, sizeof(s->comment));
437 1617ad97 Fabrice Bellard
            break;
438
        }
439
        break;
440
    case 'm':
441
        /* new stream */
442
        get_word(st_type, sizeof(st_type), &p);
443
        if (!strcmp(st_type, "audio")) {
444
            codec_type = CODEC_TYPE_AUDIO;
445
        } else if (!strcmp(st_type, "video")) {
446
            codec_type = CODEC_TYPE_VIDEO;
447
        } else {
448
            return;
449
        }
450
        rtsp_st = av_mallocz(sizeof(RTSPStream));
451
        if (!rtsp_st)
452
            return;
453 8b1ab7bf Fabrice Bellard
        rtsp_st->stream_index = -1;
454
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
455 93ced3e8 Fabrice Bellard
456
        rtsp_st->sdp_ip = s1->default_ip;
457
        rtsp_st->sdp_ttl = s1->default_ttl;
458
459
        get_word(buf1, sizeof(buf1), &p); /* port */
460
        rtsp_st->sdp_port = atoi(buf1);
461
462
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
463 115329f1 Diego Biurrun
464 93ced3e8 Fabrice Bellard
        /* XXX: handle list of formats */
465
        get_word(buf1, sizeof(buf1), &p); /* format list */
466
        rtsp_st->sdp_payload_type = atoi(buf1);
467
468 7ed19d7f Luca Abeni
        if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
469 8b1ab7bf Fabrice Bellard
            /* no corresponding stream */
470
        } else {
471
            st = av_new_stream(s, 0);
472
            if (!st)
473
                return;
474
            st->priv_data = rtsp_st;
475
            rtsp_st->stream_index = st->index;
476 01f4895c Michael Niedermayer
            st->codec->codec_type = codec_type;
477 d1ccf0e0 Romain Degez
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
478 8b1ab7bf Fabrice Bellard
                /* if standard payload type, we can find the codec right now */
479 01f4895c Michael Niedermayer
                rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
480 8b1ab7bf Fabrice Bellard
            }
481
        }
482 1617ad97 Fabrice Bellard
        /* put a default control url */
483 75e61b0e Måns Rullgård
        av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
484 1617ad97 Fabrice Bellard
        break;
485
    case 'a':
486 f7d78f36 Måns Rullgård
        if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
487 1617ad97 Fabrice Bellard
            char proto[32];
488
            /* get the control url */
489
            st = s->streams[s->nb_streams - 1];
490
            rtsp_st = st->priv_data;
491 115329f1 Diego Biurrun
492 1617ad97 Fabrice Bellard
            /* XXX: may need to add full url resolution */
493 6ba5cbc6 Petr Doubek
            url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
494 1617ad97 Fabrice Bellard
            if (proto[0] == '\0') {
495
                /* relative control URL */
496 75e61b0e Måns Rullgård
                av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
497
                av_strlcat(rtsp_st->control_url, p,   sizeof(rtsp_st->control_url));
498 1617ad97 Fabrice Bellard
            } else {
499 75e61b0e Måns Rullgård
                av_strlcpy(rtsp_st->control_url, p,   sizeof(rtsp_st->control_url));
500 1617ad97 Fabrice Bellard
            }
501 f7d78f36 Måns Rullgård
        } else if (av_strstart(p, "rtpmap:", &p)) {
502 93ced3e8 Fabrice Bellard
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
503 115329f1 Diego Biurrun
            get_word(buf1, sizeof(buf1), &p);
504 93ced3e8 Fabrice Bellard
            payload_type = atoi(buf1);
505
            for(i = 0; i < s->nb_streams;i++) {
506
                st = s->streams[i];
507
                rtsp_st = st->priv_data;
508
                if (rtsp_st->sdp_payload_type == payload_type) {
509 4934884a Ryan Martell
                    sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
510 93ced3e8 Fabrice Bellard
                }
511
            }
512 f7d78f36 Måns Rullgård
        } else if (av_strstart(p, "fmtp:", &p)) {
513 93ced3e8 Fabrice Bellard
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
514 115329f1 Diego Biurrun
            get_word(buf1, sizeof(buf1), &p);
515 93ced3e8 Fabrice Bellard
            payload_type = atoi(buf1);
516
            for(i = 0; i < s->nb_streams;i++) {
517
                st = s->streams[i];
518
                rtsp_st = st->priv_data;
519
                if (rtsp_st->sdp_payload_type == payload_type) {
520 4934884a Ryan Martell
                    if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
521
                        if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
522
                            sdp_parse_fmtp(st, p);
523
                        }
524
                    } else {
525 ed787542 Ryan Martell
                        sdp_parse_fmtp(st, p);
526 4934884a Ryan Martell
                    }
527 93ced3e8 Fabrice Bellard
                }
528
            }
529 f7d78f36 Måns Rullgård
        } else if(av_strstart(p, "framesize:", &p)) {
530 d0deedcb Ryan Martell
            // let dynamic protocol handlers have a stab at the line.
531
            get_word(buf1, sizeof(buf1), &p);
532
            payload_type = atoi(buf1);
533
            for(i = 0; i < s->nb_streams;i++) {
534
                st = s->streams[i];
535
                rtsp_st = st->priv_data;
536
                if (rtsp_st->sdp_payload_type == payload_type) {
537
                    if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
538
                        rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
539
                    }
540
                }
541
            }
542 f7d78f36 Måns Rullgård
        } else if(av_strstart(p, "range:", &p)) {
543 31693e00 Ryan Martell
            int64_t start, end;
544
545
            // this is so that seeking on a streamed file can work.
546
            rtsp_parse_range_npt(p, &start, &end);
547
            s->start_time= start;
548
            s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
549 119b4668 Ronald S. Bultje
        } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
550
            if (atoi(p) == 1)
551
                rt->transport = RTSP_TRANSPORT_RDT;
552 8646b907 Ronald S. Bultje
        } else if (s->nb_streams > 0) {
553
            rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
554
            if (rtsp_st->dynamic_handler &&
555
                rtsp_st->dynamic_handler->parse_sdp_a_line)
556
                rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
557
                    rtsp_st->dynamic_protocol_context, buf);
558 1617ad97 Fabrice Bellard
        }
559
        break;
560
    }
561
}
562
563 5c91a675 Zdenek Kabelac
static int sdp_parse(AVFormatContext *s, const char *content)
564 1617ad97 Fabrice Bellard
{
565
    const char *p;
566
    int letter;
567 d6bb9ebd Ronald S. Bultje
    char buf[2048], *q;
568 93ced3e8 Fabrice Bellard
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
569 115329f1 Diego Biurrun
570 93ced3e8 Fabrice Bellard
    memset(s1, 0, sizeof(SDPParseState));
571 1617ad97 Fabrice Bellard
    p = content;
572
    for(;;) {
573
        skip_spaces(&p);
574
        letter = *p;
575
        if (letter == '\0')
576
            break;
577
        p++;
578
        if (*p != '=')
579
            goto next_line;
580
        p++;
581
        /* get the content */
582
        q = buf;
583 b6892136 Fabrice Bellard
        while (*p != '\n' && *p != '\r' && *p != '\0') {
584 1617ad97 Fabrice Bellard
            if ((q - buf) < sizeof(buf) - 1)
585
                *q++ = *p;
586
            p++;
587
        }
588
        *q = '\0';
589 93ced3e8 Fabrice Bellard
        sdp_parse_line(s, s1, letter, buf);
590 1617ad97 Fabrice Bellard
    next_line:
591
        while (*p != '\n' && *p != '\0')
592
            p++;
593
        if (*p == '\n')
594
            p++;
595
    }
596
    return 0;
597
}
598
599
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
600
{
601
    const char *p;
602
    int v;
603
604
    p = *pp;
605
    skip_spaces(&p);
606
    v = strtol(p, (char **)&p, 10);
607
    if (*p == '-') {
608
        p++;
609
        *min_ptr = v;
610
        v = strtol(p, (char **)&p, 10);
611
        *max_ptr = v;
612
    } else {
613
        *min_ptr = v;
614
        *max_ptr = v;
615
    }
616
    *pp = p;
617
}
618
619
/* XXX: only one transport specification is parsed */
620
static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
621
{
622
    char transport_protocol[16];
623
    char profile[16];
624
    char lower_transport[16];
625
    char parameter[16];
626
    RTSPTransportField *th;
627
    char buf[256];
628 115329f1 Diego Biurrun
629 1617ad97 Fabrice Bellard
    reply->nb_transports = 0;
630 115329f1 Diego Biurrun
631 1617ad97 Fabrice Bellard
    for(;;) {
632
        skip_spaces(&p);
633
        if (*p == '\0')
634
            break;
635
636
        th = &reply->transports[reply->nb_transports];
637
638 115329f1 Diego Biurrun
        get_word_sep(transport_protocol, sizeof(transport_protocol),
639 1617ad97 Fabrice Bellard
                     "/", &p);
640
        if (*p == '/')
641
            p++;
642 e1502118 Luca Barbato
        if (!strcasecmp (transport_protocol, "rtp")) {
643 7ecc634e Luca Barbato
            get_word_sep(profile, sizeof(profile), "/;,", &p);
644
            lower_transport[0] = '\0';
645
            /* rtp/avp/<protocol> */
646
            if (*p == '/') {
647
                p++;
648
                get_word_sep(lower_transport, sizeof(lower_transport),
649
                             ";,", &p);
650 119b4668 Ronald S. Bultje
            }
651
            th->transport = RTSP_TRANSPORT_RTP;
652
        } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
653
                   !strcasecmp (transport_protocol, "x-real-rdt")) {
654 7ecc634e Luca Barbato
            /* x-pn-tng/<protocol> */
655 e1502118 Luca Barbato
            get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
656
            profile[0] = '\0';
657 119b4668 Ronald S. Bultje
            th->transport = RTSP_TRANSPORT_RDT;
658 1617ad97 Fabrice Bellard
        }
659 b6892136 Fabrice Bellard
        if (!strcasecmp(lower_transport, "TCP"))
660 90abbdba Ronald S. Bultje
            th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
661 1617ad97 Fabrice Bellard
        else
662 90abbdba Ronald S. Bultje
            th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
663 115329f1 Diego Biurrun
664 1617ad97 Fabrice Bellard
        if (*p == ';')
665
            p++;
666
        /* get each parameter */
667
        while (*p != '\0' && *p != ',') {
668
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
669
            if (!strcmp(parameter, "port")) {
670
                if (*p == '=') {
671
                    p++;
672
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
673
                }
674
            } else if (!strcmp(parameter, "client_port")) {
675
                if (*p == '=') {
676
                    p++;
677 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->client_port_min,
678 1617ad97 Fabrice Bellard
                                     &th->client_port_max, &p);
679
                }
680
            } else if (!strcmp(parameter, "server_port")) {
681
                if (*p == '=') {
682
                    p++;
683 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->server_port_min,
684 1617ad97 Fabrice Bellard
                                     &th->server_port_max, &p);
685
                }
686
            } else if (!strcmp(parameter, "interleaved")) {
687
                if (*p == '=') {
688
                    p++;
689 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->interleaved_min,
690 1617ad97 Fabrice Bellard
                                     &th->interleaved_max, &p);
691
                }
692
            } else if (!strcmp(parameter, "multicast")) {
693 90abbdba Ronald S. Bultje
                if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
694
                    th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
695 1617ad97 Fabrice Bellard
            } else if (!strcmp(parameter, "ttl")) {
696
                if (*p == '=') {
697
                    p++;
698
                    th->ttl = strtol(p, (char **)&p, 10);
699
                }
700
            } else if (!strcmp(parameter, "destination")) {
701
                struct in_addr ipaddr;
702
703
                if (*p == '=') {
704
                    p++;
705
                    get_word_sep(buf, sizeof(buf), ";,", &p);
706 115329f1 Diego Biurrun
                    if (inet_aton(buf, &ipaddr))
707 1617ad97 Fabrice Bellard
                        th->destination = ntohl(ipaddr.s_addr);
708
                }
709
            }
710
            while (*p != ';' && *p != '\0' && *p != ',')
711
                p++;
712
            if (*p == ';')
713
                p++;
714
        }
715
        if (*p == ',')
716
            p++;
717
718
        reply->nb_transports++;
719
    }
720
}
721
722
void rtsp_parse_line(RTSPHeader *reply, const char *buf)
723
{
724
    const char *p;
725
726
    /* NOTE: we do case independent match for broken servers */
727
    p = buf;
728 f7d78f36 Måns Rullgård
    if (av_stristart(p, "Session:", &p)) {
729 1617ad97 Fabrice Bellard
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
730 f7d78f36 Måns Rullgård
    } else if (av_stristart(p, "Content-Length:", &p)) {
731 1617ad97 Fabrice Bellard
        reply->content_length = strtol(p, NULL, 10);
732 f7d78f36 Måns Rullgård
    } else if (av_stristart(p, "Transport:", &p)) {
733 1617ad97 Fabrice Bellard
        rtsp_parse_transport(reply, p);
734 f7d78f36 Måns Rullgård
    } else if (av_stristart(p, "CSeq:", &p)) {
735 1617ad97 Fabrice Bellard
        reply->seq = strtol(p, NULL, 10);
736 f7d78f36 Måns Rullgård
    } else if (av_stristart(p, "Range:", &p)) {
737 31693e00 Ryan Martell
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
738 30aa6aed Ronald S. Bultje
    } else if (av_stristart(p, "RealChallenge1:", &p)) {
739
        skip_spaces(&p);
740
        av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
741 1617ad97 Fabrice Bellard
    }
742
}
743
744 2a42b5c3 Leon van Stuivenberg
static int url_readbuf(URLContext *h, unsigned char *buf, int size)
745
{
746
    int ret, len;
747
748
    len = 0;
749
    while (len < size) {
750
        ret = url_read(h, buf+len, size-len);
751
        if (ret < 1)
752
            return ret;
753
        len += ret;
754
    }
755
    return len;
756
}
757
758 b7b8fc34 Fabrice Bellard
/* skip a RTP/TCP interleaved packet */
759
static void rtsp_skip_packet(AVFormatContext *s)
760
{
761
    RTSPState *rt = s->priv_data;
762
    int ret, len, len1;
763
    uint8_t buf[1024];
764
765 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, 3);
766 b7b8fc34 Fabrice Bellard
    if (ret != 3)
767
        return;
768 80fb8234 Ronald S. Bultje
    len = AV_RB16(buf + 1);
769 b7b8fc34 Fabrice Bellard
#ifdef DEBUG
770
    printf("skipping RTP packet len=%d\n", len);
771
#endif
772
    /* skip payload */
773
    while (len > 0) {
774
        len1 = len;
775
        if (len1 > sizeof(buf))
776
            len1 = sizeof(buf);
777 2a42b5c3 Leon van Stuivenberg
        ret = url_readbuf(rt->rtsp_hd, buf, len1);
778 b7b8fc34 Fabrice Bellard
        if (ret != len1)
779
            return;
780
        len -= len1;
781
    }
782
}
783 1617ad97 Fabrice Bellard
784 115329f1 Diego Biurrun
static void rtsp_send_cmd(AVFormatContext *s,
785
                          const char *cmd, RTSPHeader *reply,
786 1617ad97 Fabrice Bellard
                          unsigned char **content_ptr)
787
{
788
    RTSPState *rt = s->priv_data;
789
    char buf[4096], buf1[1024], *q;
790
    unsigned char ch;
791
    const char *p;
792
    int content_length, line_count;
793
    unsigned char *content = NULL;
794
795
    memset(reply, 0, sizeof(RTSPHeader));
796
797
    rt->seq++;
798 75e61b0e Måns Rullgård
    av_strlcpy(buf, cmd, sizeof(buf));
799 b6892136 Fabrice Bellard
    snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
800 75e61b0e Måns Rullgård
    av_strlcat(buf, buf1, sizeof(buf));
801 1617ad97 Fabrice Bellard
    if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
802 b6892136 Fabrice Bellard
        snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
803 75e61b0e Måns Rullgård
        av_strlcat(buf, buf1, sizeof(buf));
804 1617ad97 Fabrice Bellard
    }
805 75e61b0e Måns Rullgård
    av_strlcat(buf, "\r\n", sizeof(buf));
806 1617ad97 Fabrice Bellard
#ifdef DEBUG
807
    printf("Sending:\n%s--\n", buf);
808
#endif
809
    url_write(rt->rtsp_hd, buf, strlen(buf));
810
811
    /* parse reply (XXX: use buffers) */
812
    line_count = 0;
813
    rt->last_reply[0] = '\0';
814
    for(;;) {
815
        q = buf;
816
        for(;;) {
817 2a42b5c3 Leon van Stuivenberg
            if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
818 1617ad97 Fabrice Bellard
                break;
819
            if (ch == '\n')
820
                break;
821 b7b8fc34 Fabrice Bellard
            if (ch == '$') {
822
                /* XXX: only parse it if first char on line ? */
823
                rtsp_skip_packet(s);
824
            } else if (ch != '\r') {
825 1617ad97 Fabrice Bellard
                if ((q - buf) < sizeof(buf) - 1)
826
                    *q++ = ch;
827
            }
828
        }
829
        *q = '\0';
830
#ifdef DEBUG
831
        printf("line='%s'\n", buf);
832
#endif
833
        /* test if last line */
834
        if (buf[0] == '\0')
835
            break;
836
        p = buf;
837
        if (line_count == 0) {
838
            /* get reply code */
839
            get_word(buf1, sizeof(buf1), &p);
840
            get_word(buf1, sizeof(buf1), &p);
841
            reply->status_code = atoi(buf1);
842
        } else {
843
            rtsp_parse_line(reply, p);
844 75e61b0e Måns Rullgård
            av_strlcat(rt->last_reply, p,    sizeof(rt->last_reply));
845
            av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
846 1617ad97 Fabrice Bellard
        }
847
        line_count++;
848
    }
849 115329f1 Diego Biurrun
850 1617ad97 Fabrice Bellard
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
851 75e61b0e Måns Rullgård
        av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
852 115329f1 Diego Biurrun
853 1617ad97 Fabrice Bellard
    content_length = reply->content_length;
854
    if (content_length > 0) {
855
        /* leave some room for a trailing '\0' (useful for simple parsing) */
856
        content = av_malloc(content_length + 1);
857 2a42b5c3 Leon van Stuivenberg
        (void)url_readbuf(rt->rtsp_hd, content, content_length);
858 1617ad97 Fabrice Bellard
        content[content_length] = '\0';
859
    }
860
    if (content_ptr)
861
        *content_ptr = content;
862 e2e2e7dd Alex Beregszaszi
    else
863
        av_free(content);
864 1617ad97 Fabrice Bellard
}
865
866
867 8b1ab7bf Fabrice Bellard
/* close and free RTSP streams */
868
static void rtsp_close_streams(RTSPState *rt)
869
{
870
    int i;
871
    RTSPStream *rtsp_st;
872
873
    for(i=0;i<rt->nb_rtsp_streams;i++) {
874
        rtsp_st = rt->rtsp_streams[i];
875
        if (rtsp_st) {
876 5465b0d4 Ronald S. Bultje
            if (rtsp_st->tx_ctx)
877
                rtp_parse_close(rtsp_st->tx_ctx);
878 8b1ab7bf Fabrice Bellard
            if (rtsp_st->rtp_handle)
879
                url_close(rtsp_st->rtp_handle);
880 4934884a Ryan Martell
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
881
                rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
882 8b1ab7bf Fabrice Bellard
        }
883
    }
884
    av_free(rt->rtsp_streams);
885
}
886
887 ee0cb67f Ronald S. Bultje
static int
888
rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
889
{
890
    AVStream *st = NULL;
891
892 a6789dca Ronald S. Bultje
    /* open the RTP context */
893
    if (rtsp_st->stream_index >= 0)
894
        st = s->streams[rtsp_st->stream_index];
895
    if (!st)
896
        s->ctx_flags |= AVFMTCTX_NOHEADER;
897 5465b0d4 Ronald S. Bultje
    rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
898 a6789dca Ronald S. Bultje
899 5465b0d4 Ronald S. Bultje
    if (!rtsp_st->tx_ctx) {
900 a6789dca Ronald S. Bultje
         return AVERROR(ENOMEM);
901
    } else {
902
        if(rtsp_st->dynamic_handler) {
903 5465b0d4 Ronald S. Bultje
            rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
904 99a1d191 Ronald S. Bultje
                                           rtsp_st->dynamic_protocol_context,
905
                                           rtsp_st->dynamic_handler);
906 ee0cb67f Ronald S. Bultje
        }
907 a6789dca Ronald S. Bultje
    }
908 ee0cb67f Ronald S. Bultje
909
    return 0;
910
}
911
912 53620bba Ronald S. Bultje
/**
913
 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
914
 */
915
static int
916 e9dea59f Ronald S. Bultje
make_setup_request (AVFormatContext *s, const char *host, int port,
917 90abbdba Ronald S. Bultje
                    int lower_transport, const char *real_challenge)
918 1617ad97 Fabrice Bellard
{
919
    RTSPState *rt = s->priv_data;
920 53620bba Ronald S. Bultje
    int j, i, err;
921 1617ad97 Fabrice Bellard
    RTSPStream *rtsp_st;
922 53620bba Ronald S. Bultje
    RTSPHeader reply1, *reply = &reply1;
923
    char cmd[2048];
924 e9dea59f Ronald S. Bultje
    const char *trans_pref;
925
926 119b4668 Ronald S. Bultje
    if (rt->transport == RTSP_TRANSPORT_RDT)
927 e9dea59f Ronald S. Bultje
        trans_pref = "x-pn-tng";
928
    else
929
        trans_pref = "RTP/AVP";
930 115329f1 Diego Biurrun
931 1617ad97 Fabrice Bellard
    /* for each stream, make the setup request */
932
    /* XXX: we assume the same server is used for the control of each
933
       RTSP stream */
934 d1ccf0e0 Romain Degez
935
    for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
936 1617ad97 Fabrice Bellard
        char transport[2048];
937
938 8b1ab7bf Fabrice Bellard
        rtsp_st = rt->rtsp_streams[i];
939 1617ad97 Fabrice Bellard
940
        /* RTP/UDP */
941 90abbdba Ronald S. Bultje
        if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
942 85fb7b34 Fabrice Bellard
            char buf[256];
943
944
            /* first try in specified port range */
945 d1ccf0e0 Romain Degez
            if (RTSP_RTP_PORT_MIN != 0) {
946
                while(j <= RTSP_RTP_PORT_MAX) {
947 b316aa1a Ronald S. Bultje
                    snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
948 ecdcbbf6 Luca Abeni
                    j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
949 dbf30963 Thijs
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
950 85fb7b34 Fabrice Bellard
                        goto rtp_opened;
951 d1ccf0e0 Romain Degez
                    }
952 85fb7b34 Fabrice Bellard
                }
953 1617ad97 Fabrice Bellard
            }
954 85fb7b34 Fabrice Bellard
955 d1ccf0e0 Romain Degez
/*            then try on any port
956
**            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
957
**                err = AVERROR_INVALIDDATA;
958
**                goto fail;
959
**            }
960
*/
961 85fb7b34 Fabrice Bellard
962
        rtp_opened:
963 8b1ab7bf Fabrice Bellard
            port = rtp_get_local_port(rtsp_st->rtp_handle);
964 0ad306bc Ronald S. Bultje
            snprintf(transport, sizeof(transport) - 1,
965 eee2cbff Ronald S. Bultje
                     "%s/UDP;", trans_pref);
966
            if (rt->server_type != RTSP_SERVER_REAL)
967
                av_strlcat(transport, "unicast;", sizeof(transport));
968
            av_strlcatf(transport, sizeof(transport),
969
                     "client_port=%d", port);
970 119b4668 Ronald S. Bultje
            if (rt->transport == RTSP_TRANSPORT_RTP)
971 e9dea59f Ronald S. Bultje
                av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
972 1617ad97 Fabrice Bellard
        }
973
974
        /* RTP/TCP */
975 90abbdba Ronald S. Bultje
        else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
976 0ad306bc Ronald S. Bultje
            snprintf(transport, sizeof(transport) - 1,
977 e9dea59f Ronald S. Bultje
                     "%s/TCP", trans_pref);
978 1617ad97 Fabrice Bellard
        }
979
980 90abbdba Ronald S. Bultje
        else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
981 0ad306bc Ronald S. Bultje
            snprintf(transport, sizeof(transport) - 1,
982 e9dea59f Ronald S. Bultje
                     "%s/UDP;multicast", trans_pref);
983 1617ad97 Fabrice Bellard
        }
984 2e889ae4 Ronald S. Bultje
        if (rt->server_type == RTSP_SERVER_REAL)
985 e9dea59f Ronald S. Bultje
            av_strlcat(transport, ";mode=play", sizeof(transport));
986 115329f1 Diego Biurrun
        snprintf(cmd, sizeof(cmd),
987 b6892136 Fabrice Bellard
                 "SETUP %s RTSP/1.0\r\n"
988
                 "Transport: %s\r\n",
989 1617ad97 Fabrice Bellard
                 rtsp_st->control_url, transport);
990 2e889ae4 Ronald S. Bultje
        if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
991 e9dea59f Ronald S. Bultje
            char real_res[41], real_csum[9];
992
            ff_rdt_calc_response_and_checksum(real_res, real_csum,
993
                                              real_challenge);
994
            av_strlcatf(cmd, sizeof(cmd),
995
                        "If-Match: %s\r\n"
996
                        "RealChallenge2: %s, sd=%s\r\n",
997
                        rt->session_id, real_res, real_csum);
998
        }
999 1617ad97 Fabrice Bellard
        rtsp_send_cmd(s, cmd, reply, NULL);
1000 8a8754d8 Ronald S. Bultje
        if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1001
            err = 1;
1002
            goto fail;
1003 7e6ca34f Ronald S. Bultje
        } else if (reply->status_code != RTSP_STATUS_OK ||
1004
                   reply->nb_transports != 1) {
1005 1617ad97 Fabrice Bellard
            err = AVERROR_INVALIDDATA;
1006
            goto fail;
1007
        }
1008
1009
        /* XXX: same protocol for all streams is required */
1010
        if (i > 0) {
1011 119b4668 Ronald S. Bultje
            if (reply->transports[0].lower_transport != rt->lower_transport ||
1012
                reply->transports[0].transport != rt->transport) {
1013 1617ad97 Fabrice Bellard
                err = AVERROR_INVALIDDATA;
1014
                goto fail;
1015
            }
1016
        } else {
1017 90abbdba Ronald S. Bultje
            rt->lower_transport = reply->transports[0].lower_transport;
1018 119b4668 Ronald S. Bultje
            rt->transport = reply->transports[0].transport;
1019 1617ad97 Fabrice Bellard
        }
1020
1021
        /* close RTP connection if not choosen */
1022 90abbdba Ronald S. Bultje
        if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1023
            (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1024 8b1ab7bf Fabrice Bellard
            url_close(rtsp_st->rtp_handle);
1025
            rtsp_st->rtp_handle = NULL;
1026 1617ad97 Fabrice Bellard
        }
1027
1028 90abbdba Ronald S. Bultje
        switch(reply->transports[0].lower_transport) {
1029
        case RTSP_LOWER_TRANSPORT_TCP:
1030 1617ad97 Fabrice Bellard
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1031
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1032
            break;
1033 115329f1 Diego Biurrun
1034 90abbdba Ronald S. Bultje
        case RTSP_LOWER_TRANSPORT_UDP:
1035 1617ad97 Fabrice Bellard
            {
1036
                char url[1024];
1037 115329f1 Diego Biurrun
1038 1617ad97 Fabrice Bellard
                /* XXX: also use address if specified */
1039 115329f1 Diego Biurrun
                snprintf(url, sizeof(url), "rtp://%s:%d",
1040 1617ad97 Fabrice Bellard
                         host, reply->transports[0].server_port_min);
1041 8b1ab7bf Fabrice Bellard
                if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1042 1617ad97 Fabrice Bellard
                    err = AVERROR_INVALIDDATA;
1043
                    goto fail;
1044
                }
1045
            }
1046
            break;
1047 90abbdba Ronald S. Bultje
        case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1048 1617ad97 Fabrice Bellard
            {
1049
                char url[1024];
1050 d02678ec Luca Barbato
                struct in_addr in;
1051 1617ad97 Fabrice Bellard
1052 d02678ec Luca Barbato
                in.s_addr = htonl(reply->transports[0].destination);
1053 35b74c3d Luca Abeni
                snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1054 d02678ec Luca Barbato
                         inet_ntoa(in),
1055
                         reply->transports[0].port_min,
1056
                         reply->transports[0].ttl);
1057 dbf30963 Thijs
                if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1058 1617ad97 Fabrice Bellard
                    err = AVERROR_INVALIDDATA;
1059
                    goto fail;
1060
                }
1061
            }
1062
            break;
1063
        }
1064 d1ccf0e0 Romain Degez
1065 ee0cb67f Ronald S. Bultje
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1066 8b1ab7bf Fabrice Bellard
            goto fail;
1067 1617ad97 Fabrice Bellard
    }
1068
1069 2e889ae4 Ronald S. Bultje
    if (rt->server_type == RTSP_SERVER_REAL)
1070 1256d16b Ronald S. Bultje
        rt->need_subscription = 1;
1071
1072 53620bba Ronald S. Bultje
    return 0;
1073
1074
fail:
1075 8a8754d8 Ronald S. Bultje
    for (i=0; i<rt->nb_rtsp_streams; i++) {
1076
        if (rt->rtsp_streams[i]->rtp_handle) {
1077
            url_close(rt->rtsp_streams[i]->rtp_handle);
1078
            rt->rtsp_streams[i]->rtp_handle = NULL;
1079
        }
1080
    }
1081 53620bba Ronald S. Bultje
    return err;
1082
}
1083
1084
static int rtsp_read_header(AVFormatContext *s,
1085
                            AVFormatParameters *ap)
1086
{
1087
    RTSPState *rt = s->priv_data;
1088
    char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1089
    URLContext *rtsp_hd;
1090
    int port, ret, err;
1091
    RTSPHeader reply1, *reply = &reply1;
1092
    unsigned char *content = NULL;
1093 90abbdba Ronald S. Bultje
    int lower_transport_mask = 0;
1094 1cf151e9 Ronald S. Bultje
    char real_challenge[64];
1095 53620bba Ronald S. Bultje
1096
    /* extract hostname and port */
1097
    url_split(NULL, 0, NULL, 0,
1098
              host, sizeof(host), &port, path, sizeof(path), s->filename);
1099
    if (port < 0)
1100
        port = RTSP_DEFAULT_PORT;
1101
1102
    /* search for options */
1103
    option_list = strchr(path, '?');
1104
    if (option_list) {
1105
        /* remove the options from the path */
1106
        *option_list++ = 0;
1107
        while(option_list) {
1108
            /* move the option pointer */
1109
            option = option_list;
1110
            option_list = strchr(option_list, '&');
1111
            if (option_list)
1112
                *(option_list++) = 0;
1113
            /* handle the options */
1114
            if (strcmp(option, "udp") == 0)
1115 90abbdba Ronald S. Bultje
                lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1116 53620bba Ronald S. Bultje
            else if (strcmp(option, "multicast") == 0)
1117 90abbdba Ronald S. Bultje
                lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1118 53620bba Ronald S. Bultje
            else if (strcmp(option, "tcp") == 0)
1119 90abbdba Ronald S. Bultje
                lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1120 53620bba Ronald S. Bultje
        }
1121
    }
1122
1123 90abbdba Ronald S. Bultje
    if (!lower_transport_mask)
1124
        lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1125 53620bba Ronald S. Bultje
1126
    /* open the tcp connexion */
1127
    snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1128
    if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1129
        return AVERROR(EIO);
1130
    rt->rtsp_hd = rtsp_hd;
1131
    rt->seq = 0;
1132
1133 1cf151e9 Ronald S. Bultje
    /* request options supported by the server; this also detects server type */
1134
    for (rt->server_type = RTSP_SERVER_RTP;;) {
1135
        snprintf(cmd, sizeof(cmd),
1136
                 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1137 2e889ae4 Ronald S. Bultje
        if (rt->server_type == RTSP_SERVER_REAL)
1138 1cf151e9 Ronald S. Bultje
            av_strlcat(cmd,
1139
                       /**
1140
                        * The following entries are required for proper
1141
                        * streaming from a Realmedia server. They are
1142
                        * interdependent in some way although we currently
1143
                        * don't quite understand how. Values were copied
1144
                        * from mplayer SVN r23589.
1145
                        * @param CompanyID is a 16-byte ID in base64
1146
                        * @param ClientChallenge is a 16-byte ID in hex
1147
                        */
1148
                       "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1149
                       "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1150
                       "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1151
                       "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1152
                       sizeof(cmd));
1153
        rtsp_send_cmd(s, cmd, reply, NULL);
1154
        if (reply->status_code != RTSP_STATUS_OK) {
1155
            err = AVERROR_INVALIDDATA;
1156
            goto fail;
1157
        }
1158
1159
        /* detect server type if not standard-compliant RTP */
1160 2e889ae4 Ronald S. Bultje
        if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1161
            rt->server_type = RTSP_SERVER_REAL;
1162 1cf151e9 Ronald S. Bultje
            continue;
1163 2e889ae4 Ronald S. Bultje
        } else if (rt->server_type == RTSP_SERVER_REAL) {
1164 1cf151e9 Ronald S. Bultje
            strcpy(real_challenge, reply->real_challenge);
1165
        }
1166
        break;
1167
    }
1168
1169 53620bba Ronald S. Bultje
    /* describe the stream */
1170
    snprintf(cmd, sizeof(cmd),
1171
             "DESCRIBE %s RTSP/1.0\r\n"
1172
             "Accept: application/sdp\r\n",
1173
             s->filename);
1174 2e889ae4 Ronald S. Bultje
    if (rt->server_type == RTSP_SERVER_REAL) {
1175 897ade1b Ronald S. Bultje
        /**
1176
         * The Require: attribute is needed for proper streaming from
1177
         * Realmedia servers.
1178
         */
1179
        av_strlcat(cmd,
1180
                   "Require: com.real.retain-entity-for-setup\r\n",
1181
                   sizeof(cmd));
1182
    }
1183 53620bba Ronald S. Bultje
    rtsp_send_cmd(s, cmd, reply, &content);
1184
    if (!content) {
1185
        err = AVERROR_INVALIDDATA;
1186
        goto fail;
1187
    }
1188
    if (reply->status_code != RTSP_STATUS_OK) {
1189
        err = AVERROR_INVALIDDATA;
1190
        goto fail;
1191
    }
1192
1193
    /* now we got the SDP description, we parse it */
1194
    ret = sdp_parse(s, (const char *)content);
1195
    av_freep(&content);
1196
    if (ret < 0) {
1197
        err = AVERROR_INVALIDDATA;
1198
        goto fail;
1199
    }
1200
1201 8a8754d8 Ronald S. Bultje
    do {
1202 90abbdba Ronald S. Bultje
        int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1203 8a8754d8 Ronald S. Bultje
1204 90abbdba Ronald S. Bultje
        err = make_setup_request(s, host, port, lower_transport,
1205 2e889ae4 Ronald S. Bultje
                                 rt->server_type == RTSP_SERVER_REAL ?
1206 e9dea59f Ronald S. Bultje
                                     real_challenge : NULL);
1207 8a8754d8 Ronald S. Bultje
        if (err < 0)
1208 7e6ca34f Ronald S. Bultje
            goto fail;
1209 90abbdba Ronald S. Bultje
        lower_transport_mask &= ~(1 << lower_transport);
1210
        if (lower_transport_mask == 0 && err == 1) {
1211 5ee0e139 Luca Barbato
            err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1212 8a8754d8 Ronald S. Bultje
            goto fail;
1213
        }
1214
    } while (err);
1215 53620bba Ronald S. Bultje
1216 ff762d6e Fabrice Bellard
    rt->state = RTSP_STATE_IDLE;
1217
    rt->seek_timestamp = 0; /* default is to start stream at position
1218
                               zero */
1219 c04c3282 Michael Niedermayer
    if (ap->initial_pause) {
1220 ff762d6e Fabrice Bellard
        /* do not start immediately */
1221
    } else {
1222
        if (rtsp_read_play(s) < 0) {
1223
            err = AVERROR_INVALIDDATA;
1224 1617ad97 Fabrice Bellard
            goto fail;
1225
        }
1226
    }
1227
    return 0;
1228
 fail:
1229 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1230 1617ad97 Fabrice Bellard
    av_freep(&content);
1231
    url_close(rt->rtsp_hd);
1232
    return err;
1233
}
1234
1235 8b1ab7bf Fabrice Bellard
static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1236
                           uint8_t *buf, int buf_size)
1237 1617ad97 Fabrice Bellard
{
1238
    RTSPState *rt = s->priv_data;
1239 b6892136 Fabrice Bellard
    int id, len, i, ret;
1240 1617ad97 Fabrice Bellard
    RTSPStream *rtsp_st;
1241
1242 b6892136 Fabrice Bellard
#ifdef DEBUG_RTP_TCP
1243
    printf("tcp_read_packet:\n");
1244
#endif
1245 1617ad97 Fabrice Bellard
 redo:
1246
    for(;;) {
1247 2a42b5c3 Leon van Stuivenberg
        ret = url_readbuf(rt->rtsp_hd, buf, 1);
1248 b6892136 Fabrice Bellard
#ifdef DEBUG_RTP_TCP
1249
        printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1250
#endif
1251
        if (ret != 1)
1252 8b1ab7bf Fabrice Bellard
            return -1;
1253 b6892136 Fabrice Bellard
        if (buf[0] == '$')
1254 1617ad97 Fabrice Bellard
            break;
1255
    }
1256 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, 3);
1257 b6892136 Fabrice Bellard
    if (ret != 3)
1258 8b1ab7bf Fabrice Bellard
        return -1;
1259 b6892136 Fabrice Bellard
    id = buf[0];
1260 80fb8234 Ronald S. Bultje
    len = AV_RB16(buf + 1);
1261 b6892136 Fabrice Bellard
#ifdef DEBUG_RTP_TCP
1262
    printf("id=%d len=%d\n", id, len);
1263
#endif
1264 8b1ab7bf Fabrice Bellard
    if (len > buf_size || len < 12)
1265 1617ad97 Fabrice Bellard
        goto redo;
1266
    /* get the data */
1267 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, len);
1268 b6892136 Fabrice Bellard
    if (ret != len)
1269 8b1ab7bf Fabrice Bellard
        return -1;
1270 985b05d3 Ronald S. Bultje
    if (rt->transport == RTSP_TRANSPORT_RDT &&
1271
        ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL) < 0)
1272
        return -1;
1273 115329f1 Diego Biurrun
1274 1617ad97 Fabrice Bellard
    /* find the matching stream */
1275 8b1ab7bf Fabrice Bellard
    for(i = 0; i < rt->nb_rtsp_streams; i++) {
1276
        rtsp_st = rt->rtsp_streams[i];
1277 115329f1 Diego Biurrun
        if (id >= rtsp_st->interleaved_min &&
1278
            id <= rtsp_st->interleaved_max)
1279 1617ad97 Fabrice Bellard
            goto found;
1280
    }
1281
    goto redo;
1282
 found:
1283 8b1ab7bf Fabrice Bellard
    *prtsp_st = rtsp_st;
1284
    return len;
1285 1617ad97 Fabrice Bellard
}
1286
1287 115329f1 Diego Biurrun
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1288 8b1ab7bf Fabrice Bellard
                           uint8_t *buf, int buf_size)
1289 1617ad97 Fabrice Bellard
{
1290 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1291 1617ad97 Fabrice Bellard
    RTSPStream *rtsp_st;
1292
    fd_set rfds;
1293
    int fd1, fd2, fd_max, n, i, ret;
1294
    struct timeval tv;
1295
1296
    for(;;) {
1297 b7b8fc34 Fabrice Bellard
        if (url_interrupt_cb())
1298 a960a1e0 Luca Barbato
            return AVERROR(EINTR);
1299 1617ad97 Fabrice Bellard
        FD_ZERO(&rfds);
1300
        fd_max = -1;
1301 8b1ab7bf Fabrice Bellard
        for(i = 0; i < rt->nb_rtsp_streams; i++) {
1302
            rtsp_st = rt->rtsp_streams[i];
1303 1617ad97 Fabrice Bellard
            /* currently, we cannot probe RTCP handle because of blocking restrictions */
1304 8b1ab7bf Fabrice Bellard
            rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1305 1617ad97 Fabrice Bellard
            if (fd1 > fd_max)
1306
                fd_max = fd1;
1307
            FD_SET(fd1, &rfds);
1308
        }
1309
        tv.tv_sec = 0;
1310 b7b8fc34 Fabrice Bellard
        tv.tv_usec = 100 * 1000;
1311 1617ad97 Fabrice Bellard
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1312
        if (n > 0) {
1313 8b1ab7bf Fabrice Bellard
            for(i = 0; i < rt->nb_rtsp_streams; i++) {
1314
                rtsp_st = rt->rtsp_streams[i];
1315
                rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1316 1617ad97 Fabrice Bellard
                if (FD_ISSET(fd1, &rfds)) {
1317 8b1ab7bf Fabrice Bellard
                    ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1318
                    if (ret > 0) {
1319
                        *prtsp_st = rtsp_st;
1320 1617ad97 Fabrice Bellard
                        return ret;
1321
                    }
1322
                }
1323
            }
1324
        }
1325
    }
1326
}
1327
1328
static int rtsp_read_packet(AVFormatContext *s,
1329
                            AVPacket *pkt)
1330
{
1331
    RTSPState *rt = s->priv_data;
1332 8b1ab7bf Fabrice Bellard
    RTSPStream *rtsp_st;
1333
    int ret, len;
1334
    uint8_t buf[RTP_MAX_PACKET_LENGTH];
1335
1336 2e889ae4 Ronald S. Bultje
    if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1337 1256d16b Ronald S. Bultje
        int i;
1338
        RTSPHeader reply1, *reply = &reply1;
1339
        char cmd[1024];
1340
1341
        snprintf(cmd, sizeof(cmd),
1342
                 "SET_PARAMETER %s RTSP/1.0\r\n"
1343
                 "Subscribe: ",
1344
                 s->filename);
1345
        for (i = 0; i < rt->nb_rtsp_streams; i++) {
1346
            if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1347 ab63fb03 Ronald S. Bultje
            ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
1348 119b4668 Ronald S. Bultje
            if (rt->transport == RTSP_TRANSPORT_RDT)
1349 f5f1e97f Ronald S. Bultje
                ff_rdt_subscribe_rule2(
1350 5465b0d4 Ronald S. Bultje
                    rt->rtsp_streams[i]->tx_ctx,
1351 f5f1e97f Ronald S. Bultje
                    cmd, sizeof(cmd), i, 0);
1352 1256d16b Ronald S. Bultje
        }
1353
        av_strlcat(cmd, "\r\n", sizeof(cmd));
1354
        rtsp_send_cmd(s, cmd, reply, NULL);
1355
        if (reply->status_code != RTSP_STATUS_OK)
1356
            return AVERROR_INVALIDDATA;
1357
        rt->need_subscription = 0;
1358
1359
        if (rt->state == RTSP_STATE_PLAYING)
1360
            rtsp_read_play (s);
1361
    }
1362
1363 8b1ab7bf Fabrice Bellard
    /* get next frames from the same RTP packet */
1364 5465b0d4 Ronald S. Bultje
    if (rt->cur_tx) {
1365 119b4668 Ronald S. Bultje
        if (rt->transport == RTSP_TRANSPORT_RDT)
1366 5465b0d4 Ronald S. Bultje
            ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1367 4fce284c Ronald S. Bultje
        else
1368 5465b0d4 Ronald S. Bultje
            ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1369 8b1ab7bf Fabrice Bellard
        if (ret == 0) {
1370 5465b0d4 Ronald S. Bultje
            rt->cur_tx = NULL;
1371 8b1ab7bf Fabrice Bellard
            return 0;
1372
        } else if (ret == 1) {
1373
            return 0;
1374
        } else {
1375 5465b0d4 Ronald S. Bultje
            rt->cur_tx = NULL;
1376 8b1ab7bf Fabrice Bellard
        }
1377
    }
1378 1617ad97 Fabrice Bellard
1379 8b1ab7bf Fabrice Bellard
    /* read next RTP packet */
1380
 redo:
1381 90abbdba Ronald S. Bultje
    switch(rt->lower_transport) {
1382 1617ad97 Fabrice Bellard
    default:
1383 90abbdba Ronald S. Bultje
    case RTSP_LOWER_TRANSPORT_TCP:
1384 8b1ab7bf Fabrice Bellard
        len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1385 1617ad97 Fabrice Bellard
        break;
1386 90abbdba Ronald S. Bultje
    case RTSP_LOWER_TRANSPORT_UDP:
1387
    case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1388 8b1ab7bf Fabrice Bellard
        len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1389 5465b0d4 Ronald S. Bultje
        if (len >=0 && rtsp_st->tx_ctx)
1390
            rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1391 1617ad97 Fabrice Bellard
        break;
1392
    }
1393 8b1ab7bf Fabrice Bellard
    if (len < 0)
1394 489b0d4d Luca Barbato
        return len;
1395 119b4668 Ronald S. Bultje
    if (rt->transport == RTSP_TRANSPORT_RDT)
1396 5465b0d4 Ronald S. Bultje
        ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1397 4fce284c Ronald S. Bultje
    else
1398 5465b0d4 Ronald S. Bultje
        ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1399 8b1ab7bf Fabrice Bellard
    if (ret < 0)
1400
        goto redo;
1401
    if (ret == 1) {
1402
        /* more packets may follow, so we save the RTP context */
1403 5465b0d4 Ronald S. Bultje
        rt->cur_tx = rtsp_st->tx_ctx;
1404 8b1ab7bf Fabrice Bellard
    }
1405
    return 0;
1406 1617ad97 Fabrice Bellard
}
1407
1408 ff762d6e Fabrice Bellard
static int rtsp_read_play(AVFormatContext *s)
1409 b7b8fc34 Fabrice Bellard
{
1410 ff762d6e Fabrice Bellard
    RTSPState *rt = s->priv_data;
1411 b7b8fc34 Fabrice Bellard
    RTSPHeader reply1, *reply = &reply1;
1412
    char cmd[1024];
1413
1414 bc874dae Michel Bardiaux
    av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1415 ff762d6e Fabrice Bellard
1416 2e889ae4 Ronald S. Bultje
    if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1417 99b2ac07 Ronald S. Bultje
        if (rt->state == RTSP_STATE_PAUSED) {
1418
            snprintf(cmd, sizeof(cmd),
1419
                     "PLAY %s RTSP/1.0\r\n",
1420
                     s->filename);
1421
        } else {
1422
            snprintf(cmd, sizeof(cmd),
1423
                     "PLAY %s RTSP/1.0\r\n"
1424
                     "Range: npt=%0.3f-\r\n",
1425
                     s->filename,
1426
                     (double)rt->seek_timestamp / AV_TIME_BASE);
1427
        }
1428
        rtsp_send_cmd(s, cmd, reply, NULL);
1429
        if (reply->status_code != RTSP_STATUS_OK) {
1430
            return -1;
1431
        }
1432 1256d16b Ronald S. Bultje
    }
1433 5f86057f Ronald S. Bultje
    rt->state = RTSP_STATE_PLAYING;
1434
    return 0;
1435 b7b8fc34 Fabrice Bellard
}
1436
1437 ff762d6e Fabrice Bellard
/* pause the stream */
1438
static int rtsp_read_pause(AVFormatContext *s)
1439 b7b8fc34 Fabrice Bellard
{
1440 ff762d6e Fabrice Bellard
    RTSPState *rt = s->priv_data;
1441 b7b8fc34 Fabrice Bellard
    RTSPHeader reply1, *reply = &reply1;
1442
    char cmd[1024];
1443
1444
    rt = s->priv_data;
1445 115329f1 Diego Biurrun
1446 ff762d6e Fabrice Bellard
    if (rt->state != RTSP_STATE_PLAYING)
1447
        return 0;
1448 2e889ae4 Ronald S. Bultje
    else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1449 99b2ac07 Ronald S. Bultje
        snprintf(cmd, sizeof(cmd),
1450
                 "PAUSE %s RTSP/1.0\r\n",
1451
                 s->filename);
1452
        rtsp_send_cmd(s, cmd, reply, NULL);
1453
        if (reply->status_code != RTSP_STATUS_OK) {
1454
            return -1;
1455
        }
1456 1256d16b Ronald S. Bultje
    }
1457 5f86057f Ronald S. Bultje
    rt->state = RTSP_STATE_PAUSED;
1458
    return 0;
1459 b7b8fc34 Fabrice Bellard
}
1460
1461 115329f1 Diego Biurrun
static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1462 7b3c1382 Michael Niedermayer
                          int64_t timestamp, int flags)
1463 ff762d6e Fabrice Bellard
{
1464
    RTSPState *rt = s->priv_data;
1465 115329f1 Diego Biurrun
1466 50755217 Luca Abeni
    rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1467 ff762d6e Fabrice Bellard
    switch(rt->state) {
1468
    default:
1469
    case RTSP_STATE_IDLE:
1470
        break;
1471
    case RTSP_STATE_PLAYING:
1472
        if (rtsp_read_play(s) != 0)
1473
            return -1;
1474
        break;
1475
    case RTSP_STATE_PAUSED:
1476
        rt->state = RTSP_STATE_IDLE;
1477
        break;
1478
    }
1479
    return 0;
1480
}
1481
1482 1617ad97 Fabrice Bellard
static int rtsp_read_close(AVFormatContext *s)
1483
{
1484
    RTSPState *rt = s->priv_data;
1485
    RTSPHeader reply1, *reply = &reply1;
1486
    char cmd[1024];
1487
1488 b6892136 Fabrice Bellard
#if 0
1489 1617ad97 Fabrice Bellard
    /* NOTE: it is valid to flush the buffer here */
1490 90abbdba Ronald S. Bultje
    if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1491 1617ad97 Fabrice Bellard
        url_fclose(&rt->rtsp_gb);
1492
    }
1493 b6892136 Fabrice Bellard
#endif
1494 115329f1 Diego Biurrun
    snprintf(cmd, sizeof(cmd),
1495 b6892136 Fabrice Bellard
             "TEARDOWN %s RTSP/1.0\r\n",
1496 1617ad97 Fabrice Bellard
             s->filename);
1497
    rtsp_send_cmd(s, cmd, reply, NULL);
1498
1499 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1500 1617ad97 Fabrice Bellard
    url_close(rt->rtsp_hd);
1501
    return 0;
1502
}
1503
1504 96862926 Alex Beregszaszi
#ifdef CONFIG_RTSP_DEMUXER
1505 d2a067d1 Måns Rullgård
AVInputFormat rtsp_demuxer = {
1506 1617ad97 Fabrice Bellard
    "rtsp",
1507 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("RTSP input format"),
1508 1617ad97 Fabrice Bellard
    sizeof(RTSPState),
1509
    rtsp_probe,
1510
    rtsp_read_header,
1511
    rtsp_read_packet,
1512
    rtsp_read_close,
1513 ff762d6e Fabrice Bellard
    rtsp_read_seek,
1514 bb76a117 Måns Rullgård
    .flags = AVFMT_NOFILE,
1515 ff762d6e Fabrice Bellard
    .read_play = rtsp_read_play,
1516
    .read_pause = rtsp_read_pause,
1517 1617ad97 Fabrice Bellard
};
1518 96862926 Alex Beregszaszi
#endif
1519 1617ad97 Fabrice Bellard
1520 cb1fdc61 Fabrice Bellard
static int sdp_probe(AVProbeData *p1)
1521 93ced3e8 Fabrice Bellard
{
1522 0e1ceacd Michael Niedermayer
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1523 cb1fdc61 Fabrice Bellard
1524
    /* we look for a line beginning "c=IN IP4" */
1525 0e1ceacd Michael Niedermayer
    while (p < p_end && *p != '\0') {
1526 f7d78f36 Måns Rullgård
        if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1527 cb1fdc61 Fabrice Bellard
            return AVPROBE_SCORE_MAX / 2;
1528 0e1ceacd Michael Niedermayer
1529
        while(p < p_end - 1 && *p != '\n') p++;
1530
        if (++p >= p_end)
1531 cb1fdc61 Fabrice Bellard
            break;
1532
        if (*p == '\r')
1533
            p++;
1534
    }
1535 93ced3e8 Fabrice Bellard
    return 0;
1536
}
1537
1538
#define SDP_MAX_SIZE 8192
1539
1540
static int sdp_read_header(AVFormatContext *s,
1541
                           AVFormatParameters *ap)
1542
{
1543 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1544 93ced3e8 Fabrice Bellard
    RTSPStream *rtsp_st;
1545
    int size, i, err;
1546
    char *content;
1547
    char url[1024];
1548
1549
    /* read the whole sdp file */
1550
    /* XXX: better loading */
1551
    content = av_malloc(SDP_MAX_SIZE);
1552 899681cd Björn Axelsson
    size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1553 93ced3e8 Fabrice Bellard
    if (size <= 0) {
1554
        av_free(content);
1555
        return AVERROR_INVALIDDATA;
1556
    }
1557
    content[size] ='\0';
1558
1559
    sdp_parse(s, content);
1560
    av_free(content);
1561
1562
    /* open each RTP stream */
1563 8b1ab7bf Fabrice Bellard
    for(i=0;i<rt->nb_rtsp_streams;i++) {
1564
        rtsp_st = rt->rtsp_streams[i];
1565 115329f1 Diego Biurrun
1566 d2bf42be Luca Abeni
        snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1567 115329f1 Diego Biurrun
                 inet_ntoa(rtsp_st->sdp_ip),
1568 93ced3e8 Fabrice Bellard
                 rtsp_st->sdp_port,
1569 d2bf42be Luca Abeni
                 rtsp_st->sdp_port,
1570 93ced3e8 Fabrice Bellard
                 rtsp_st->sdp_ttl);
1571 dbf30963 Thijs
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1572 93ced3e8 Fabrice Bellard
            err = AVERROR_INVALIDDATA;
1573
            goto fail;
1574
        }
1575 ee0cb67f Ronald S. Bultje
        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1576 8b1ab7bf Fabrice Bellard
            goto fail;
1577 93ced3e8 Fabrice Bellard
    }
1578
    return 0;
1579
 fail:
1580 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1581 93ced3e8 Fabrice Bellard
    return err;
1582
}
1583
1584
static int sdp_read_packet(AVFormatContext *s,
1585
                            AVPacket *pkt)
1586
{
1587 8b1ab7bf Fabrice Bellard
    return rtsp_read_packet(s, pkt);
1588 93ced3e8 Fabrice Bellard
}
1589
1590
static int sdp_read_close(AVFormatContext *s)
1591
{
1592 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1593
    rtsp_close_streams(rt);
1594 93ced3e8 Fabrice Bellard
    return 0;
1595
}
1596
1597 ff70e601 Måns Rullgård
#ifdef CONFIG_SDP_DEMUXER
1598
AVInputFormat sdp_demuxer = {
1599 93ced3e8 Fabrice Bellard
    "sdp",
1600 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("SDP"),
1601 93ced3e8 Fabrice Bellard
    sizeof(RTSPState),
1602
    sdp_probe,
1603
    sdp_read_header,
1604
    sdp_read_packet,
1605
    sdp_read_close,
1606
};
1607 ff70e601 Måns Rullgård
#endif
1608 93ced3e8 Fabrice Bellard
1609 e7047005 Alex Beregszaszi
#ifdef CONFIG_REDIR_DEMUXER
1610 1617ad97 Fabrice Bellard
/* dummy redirector format (used directly in av_open_input_file now) */
1611
static int redir_probe(AVProbeData *pd)
1612
{
1613
    const char *p;
1614
    p = pd->buf;
1615
    while (redir_isspace(*p))
1616
        p++;
1617 f7d78f36 Måns Rullgård
    if (av_strstart(p, "http://", NULL) ||
1618
        av_strstart(p, "rtsp://", NULL))
1619 1617ad97 Fabrice Bellard
        return AVPROBE_SCORE_MAX;
1620
    return 0;
1621
}
1622
1623 e8acf0ed Luca Abeni
static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1624 1617ad97 Fabrice Bellard
{
1625
    char buf[4096], *q;
1626
    int c;
1627
    AVFormatContext *ic = NULL;
1628 e8acf0ed Luca Abeni
    ByteIOContext *f = s->pb;
1629 1617ad97 Fabrice Bellard
1630
    /* parse each URL and try to open it */
1631
    c = url_fgetc(f);
1632
    while (c != URL_EOF) {
1633
        /* skip spaces */
1634
        for(;;) {
1635
            if (!redir_isspace(c))
1636
                break;
1637
            c = url_fgetc(f);
1638
        }
1639
        if (c == URL_EOF)
1640
            break;
1641
        /* record url */
1642
        q = buf;
1643
        for(;;) {
1644
            if (c == URL_EOF || redir_isspace(c))
1645
                break;
1646
            if ((q - buf) < sizeof(buf) - 1)
1647
                *q++ = c;
1648
            c = url_fgetc(f);
1649
        }
1650
        *q = '\0';
1651
        //printf("URL='%s'\n", buf);
1652
        /* try to open the media file */
1653
        if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1654
            break;
1655
    }
1656
    if (!ic)
1657 6f3e0b21 Panagiotis Issaris
        return AVERROR(EIO);
1658 e8acf0ed Luca Abeni
1659
    *s = *ic;
1660
    url_fclose(f);
1661
1662
    return 0;
1663 1617ad97 Fabrice Bellard
}
1664
1665 d2a067d1 Måns Rullgård
AVInputFormat redir_demuxer = {
1666 1617ad97 Fabrice Bellard
    "redir",
1667 bde15e74 Stefano Sabatini
    NULL_IF_CONFIG_SMALL("Redirector format"),
1668 1617ad97 Fabrice Bellard
    0,
1669
    redir_probe,
1670 e8acf0ed Luca Abeni
    redir_read_header,
1671 1617ad97 Fabrice Bellard
    NULL,
1672
    NULL,
1673
};
1674 e7047005 Alex Beregszaszi
#endif