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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
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 * 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
#include "avformat.h"
22
23 db0ed93e Marc Hoffman
#include <sys/time.h>
24 438fcb75 François Revol
#include <unistd.h> /* for select() prototype */
25 42572ef5 Ramiro Polla
#include "network.h"
26 1617ad97 Fabrice Bellard
27 4934884a Ryan Martell
#include "rtp_internal.h"
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29 1617ad97 Fabrice Bellard
//#define DEBUG
30 b6892136 Fabrice Bellard
//#define DEBUG_RTP_TCP
31 1617ad97 Fabrice Bellard
32 ff762d6e Fabrice Bellard
enum RTSPClientState {
33
    RTSP_STATE_IDLE,
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    RTSP_STATE_PLAYING,
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    RTSP_STATE_PAUSED,
36
};
37
38 1617ad97 Fabrice Bellard
typedef struct RTSPState {
39
    URLContext *rtsp_hd; /* RTSP TCP connexion handle */
40 8b1ab7bf Fabrice Bellard
    int nb_rtsp_streams;
41
    struct RTSPStream **rtsp_streams;
42 115329f1 Diego Biurrun
43 ff762d6e Fabrice Bellard
    enum RTSPClientState state;
44
    int64_t seek_timestamp;
45 115329f1 Diego Biurrun
46 b6892136 Fabrice Bellard
    /* XXX: currently we use unbuffered input */
47
    //    ByteIOContext rtsp_gb;
48 1617ad97 Fabrice Bellard
    int seq;        /* RTSP command sequence number */
49
    char session_id[512];
50
    enum RTSPProtocol protocol;
51
    char last_reply[2048]; /* XXX: allocate ? */
52 8b1ab7bf Fabrice Bellard
    RTPDemuxContext *cur_rtp;
53 1617ad97 Fabrice Bellard
} RTSPState;
54
55
typedef struct RTSPStream {
56 8b1ab7bf Fabrice Bellard
    URLContext *rtp_handle; /* RTP stream handle */
57
    RTPDemuxContext *rtp_ctx; /* RTP parse context */
58 115329f1 Diego Biurrun
59 8b1ab7bf Fabrice Bellard
    int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
60 1617ad97 Fabrice Bellard
    int interleaved_min, interleaved_max;  /* interleave ids, if TCP transport */
61 93ced3e8 Fabrice Bellard
    char control_url[1024]; /* url for this stream (from SDP) */
62
63
    int sdp_port; /* port (from SDP content - not used in RTSP) */
64
    struct in_addr sdp_ip; /* IP address  (from SDP content - not used in RTSP) */
65
    int sdp_ttl;  /* IP TTL (from SDP content - not used in RTSP) */
66
    int sdp_payload_type; /* payload type - only used in SDP */
67 d1ccf0e0 Romain Degez
    rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
68 4934884a Ryan Martell
69
    RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
70
    void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
71 1617ad97 Fabrice Bellard
} RTSPStream;
72
73 ff762d6e Fabrice Bellard
static int rtsp_read_play(AVFormatContext *s);
74
75 1617ad97 Fabrice Bellard
/* XXX: currently, the only way to change the protocols consists in
76
   changing this variable */
77
78 d1ccf0e0 Romain Degez
int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
79 85fb7b34 Fabrice Bellard
80 1617ad97 Fabrice Bellard
FFRTSPCallback *ff_rtsp_callback = NULL;
81
82
static int rtsp_probe(AVProbeData *p)
83
{
84
    if (strstart(p->filename, "rtsp:", NULL))
85
        return AVPROBE_SCORE_MAX;
86
    return 0;
87
}
88
89
static int redir_isspace(int c)
90
{
91
    return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
92
}
93
94
static void skip_spaces(const char **pp)
95
{
96
    const char *p;
97
    p = *pp;
98
    while (redir_isspace(*p))
99
        p++;
100
    *pp = p;
101
}
102
103 115329f1 Diego Biurrun
static void get_word_sep(char *buf, int buf_size, const char *sep,
104 1617ad97 Fabrice Bellard
                         const char **pp)
105
{
106
    const char *p;
107
    char *q;
108
109
    p = *pp;
110 d1ccf0e0 Romain Degez
    if (*p == '/')
111
        p++;
112 1617ad97 Fabrice Bellard
    skip_spaces(&p);
113
    q = buf;
114
    while (!strchr(sep, *p) && *p != '\0') {
115
        if ((q - buf) < buf_size - 1)
116
            *q++ = *p;
117
        p++;
118
    }
119
    if (buf_size > 0)
120
        *q = '\0';
121
    *pp = p;
122
}
123
124
static void get_word(char *buf, int buf_size, const char **pp)
125
{
126
    const char *p;
127
    char *q;
128
129
    p = *pp;
130
    skip_spaces(&p);
131
    q = buf;
132
    while (!redir_isspace(*p) && *p != '\0') {
133
        if ((q - buf) < buf_size - 1)
134
            *q++ = *p;
135
        p++;
136
    }
137
    if (buf_size > 0)
138
        *q = '\0';
139
    *pp = p;
140
}
141
142 93ced3e8 Fabrice Bellard
/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
143
   params>] */
144 4934884a Ryan Martell
static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
145 93ced3e8 Fabrice Bellard
{
146
    char buf[256];
147 d1ccf0e0 Romain Degez
    int i;
148
    AVCodec *c;
149 7b49ce2e Stefan Huehner
    const char *c_name;
150 93ced3e8 Fabrice Bellard
151 d1ccf0e0 Romain Degez
    /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
152
       see if we can handle this kind of payload */
153 93ced3e8 Fabrice Bellard
    get_word_sep(buf, sizeof(buf), "/", &p);
154 d1ccf0e0 Romain Degez
    if (payload_type >= RTP_PT_PRIVATE) {
155 4934884a Ryan Martell
        RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
156
        while(handler) {
157
            if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
158
                codec->codec_id = handler->codec_id;
159
                rtsp_st->dynamic_handler= handler;
160
                if(handler->open) {
161
                    rtsp_st->dynamic_protocol_context= handler->open();
162
                }
163 d1ccf0e0 Romain Degez
                break;
164
            }
165 4934884a Ryan Martell
            handler= handler->next;
166
        }
167 93ced3e8 Fabrice Bellard
    } else {
168 d1ccf0e0 Romain Degez
        /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
169
        /* search into AVRtpPayloadTypes[] */
170
        for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
171
            if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
172
                codec->codec_id = AVRtpPayloadTypes[i].codec_id;
173
                break;
174
            }
175
    }
176
177
    c = avcodec_find_decoder(codec->codec_id);
178
    if (c && c->name)
179 7b49ce2e Stefan Huehner
        c_name = c->name;
180 d1ccf0e0 Romain Degez
    else
181
        c_name = (char *)NULL;
182
183
    if (c_name) {
184
        get_word_sep(buf, sizeof(buf), "/", &p);
185
        i = atoi(buf);
186
        switch (codec->codec_type) {
187
            case CODEC_TYPE_AUDIO:
188
                av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
189
                codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
190
                codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
191
                if (i > 0) {
192
                    codec->sample_rate = i;
193
                    get_word_sep(buf, sizeof(buf), "/", &p);
194
                    i = atoi(buf);
195
                    if (i > 0)
196
                        codec->channels = i;
197 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
198
                    //  frequency.  No problem, but the sample rate is being set here by the sdp line.  Upcoming patch forthcoming. (rdm)
199 d1ccf0e0 Romain Degez
                }
200
                av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
201
                av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
202
                break;
203
            case CODEC_TYPE_VIDEO:
204
                av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
205
                break;
206
            default:
207
                break;
208
        }
209
        return 0;
210 93ced3e8 Fabrice Bellard
    }
211 d1ccf0e0 Romain Degez
212
    return -1;
213 93ced3e8 Fabrice Bellard
}
214
215
/* return the length and optionnaly the data */
216
static int hex_to_data(uint8_t *data, const char *p)
217
{
218
    int c, len, v;
219
220
    len = 0;
221
    v = 1;
222
    for(;;) {
223
        skip_spaces(&p);
224
        if (p == '\0')
225
            break;
226
        c = toupper((unsigned char)*p++);
227
        if (c >= '0' && c <= '9')
228
            c = c - '0';
229
        else if (c >= 'A' && c <= 'F')
230
            c = c - 'A' + 10;
231
        else
232
            break;
233
        v = (v << 4) | c;
234
        if (v & 0x100) {
235
            if (data)
236
                data[len] = v;
237
            len++;
238
            v = 1;
239
        }
240
    }
241
    return len;
242
}
243
244 d1ccf0e0 Romain Degez
static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
245
{
246
    switch (codec->codec_id) {
247
        case CODEC_ID_MPEG4:
248 cbee7a69 Baptiste Coudurier
        case CODEC_ID_AAC:
249 d1ccf0e0 Romain Degez
            if (!strcmp(attr, "config")) {
250
                /* decode the hexa encoded parameter */
251
                int len = hex_to_data(NULL, value);
252
                codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
253
                if (!codec->extradata)
254
                    return;
255
                codec->extradata_size = len;
256
                hex_to_data(codec->extradata, value);
257
            }
258
            break;
259
        default:
260
            break;
261
    }
262
    return;
263
}
264
265
typedef struct attrname_map
266
{
267 7b49ce2e Stefan Huehner
    const char *str;
268 d1ccf0e0 Romain Degez
    uint16_t type;
269
    uint32_t offset;
270
} attrname_map_t;
271
272
/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
273
#define ATTR_NAME_TYPE_INT 0
274
#define ATTR_NAME_TYPE_STR 1
275
static attrname_map_t attr_names[]=
276
{
277
    {"SizeLength",       ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
278
    {"IndexLength",      ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
279
    {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
280
    {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
281
    {"StreamType",       ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
282
    {"mode",             ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
283
    {NULL, -1, -1},
284
};
285
286 d0deedcb Ryan Martell
/** parse the attribute line from the fmtp a line of an sdp resonse.  This is broken out as a function
287
* because it is used in rtp_h264.c, which is forthcoming.
288
*/
289
int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
290
{
291
    skip_spaces(p);
292
    if(**p)
293
    {
294
        get_word_sep(attr, attr_size, "=", p);
295
        if (**p == '=')
296
            (*p)++;
297
        get_word_sep(value, value_size, ";", p);
298
        if (**p == ';')
299
            (*p)++;
300
        return 1;
301
    }
302
    return 0;
303
}
304
305 d1ccf0e0 Romain Degez
/* parse a SDP line and save stream attributes */
306
static void sdp_parse_fmtp(AVStream *st, const char *p)
307 93ced3e8 Fabrice Bellard
{
308
    char attr[256];
309
    char value[4096];
310 d1ccf0e0 Romain Degez
    int i;
311
312
    RTSPStream *rtsp_st = st->priv_data;
313 01f4895c Michael Niedermayer
    AVCodecContext *codec = st->codec;
314 d1ccf0e0 Romain Degez
    rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
315 93ced3e8 Fabrice Bellard
316
    /* loop on each attribute */
317 1ad20f96 Ryan Martell
    while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
318
    {
319 bb270c08 Diego Biurrun
        /* grab the codec extra_data from the config parameter of the fmtp line */
320 d1ccf0e0 Romain Degez
        sdp_parse_fmtp_config(codec, attr, value);
321
        /* Looking for a known attribute */
322
        for (i = 0; attr_names[i].str; ++i) {
323
            if (!strcasecmp(attr, attr_names[i].str)) {
324
                if (attr_names[i].type == ATTR_NAME_TYPE_INT)
325
                    *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
326
                else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
327
                    *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
328 bb270c08 Diego Biurrun
            }
329 93ced3e8 Fabrice Bellard
        }
330
    }
331
}
332
333 31693e00 Ryan Martell
/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
334
 *  and end time.
335
 *  Used for seeking in the rtp stream.
336
 */
337
static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
338
{
339
    char buf[256];
340
341
    skip_spaces(&p);
342
    if (!stristart(p, "npt=", &p))
343
        return;
344
345
    *start = AV_NOPTS_VALUE;
346
    *end = AV_NOPTS_VALUE;
347
348
    get_word_sep(buf, sizeof(buf), "-", &p);
349
    *start = parse_date(buf, 1);
350
    if (*p == '-') {
351
        p++;
352
        get_word_sep(buf, sizeof(buf), "-", &p);
353
        *end = parse_date(buf, 1);
354
    }
355
//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
356
//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
357
}
358
359 93ced3e8 Fabrice Bellard
typedef struct SDPParseState {
360
    /* SDP only */
361
    struct in_addr default_ip;
362
    int default_ttl;
363
} SDPParseState;
364
365
static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
366 1617ad97 Fabrice Bellard
                           int letter, const char *buf)
367
{
368 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
369 1617ad97 Fabrice Bellard
    char buf1[64], st_type[64];
370
    const char *p;
371 93ced3e8 Fabrice Bellard
    int codec_type, payload_type, i;
372 1617ad97 Fabrice Bellard
    AVStream *st;
373
    RTSPStream *rtsp_st;
374 93ced3e8 Fabrice Bellard
    struct in_addr sdp_ip;
375
    int ttl;
376
377 1617ad97 Fabrice Bellard
#ifdef DEBUG
378
    printf("sdp: %c='%s'\n", letter, buf);
379
#endif
380
381
    p = buf;
382
    switch(letter) {
383 93ced3e8 Fabrice Bellard
    case 'c':
384
        get_word(buf1, sizeof(buf1), &p);
385
        if (strcmp(buf1, "IN") != 0)
386
            return;
387
        get_word(buf1, sizeof(buf1), &p);
388
        if (strcmp(buf1, "IP4") != 0)
389
            return;
390
        get_word_sep(buf1, sizeof(buf1), "/", &p);
391
        if (inet_aton(buf1, &sdp_ip) == 0)
392
            return;
393
        ttl = 16;
394
        if (*p == '/') {
395
            p++;
396
            get_word_sep(buf1, sizeof(buf1), "/", &p);
397
            ttl = atoi(buf1);
398
        }
399
        if (s->nb_streams == 0) {
400
            s1->default_ip = sdp_ip;
401
            s1->default_ttl = ttl;
402
        } else {
403
            st = s->streams[s->nb_streams - 1];
404
            rtsp_st = st->priv_data;
405
            rtsp_st->sdp_ip = sdp_ip;
406
            rtsp_st->sdp_ttl = ttl;
407
        }
408
        break;
409 1617ad97 Fabrice Bellard
    case 's':
410
        pstrcpy(s->title, sizeof(s->title), p);
411
        break;
412
    case 'i':
413
        if (s->nb_streams == 0) {
414
            pstrcpy(s->comment, sizeof(s->comment), p);
415
            break;
416
        }
417
        break;
418
    case 'm':
419
        /* new stream */
420
        get_word(st_type, sizeof(st_type), &p);
421
        if (!strcmp(st_type, "audio")) {
422
            codec_type = CODEC_TYPE_AUDIO;
423
        } else if (!strcmp(st_type, "video")) {
424
            codec_type = CODEC_TYPE_VIDEO;
425
        } else {
426
            return;
427
        }
428
        rtsp_st = av_mallocz(sizeof(RTSPStream));
429
        if (!rtsp_st)
430
            return;
431 8b1ab7bf Fabrice Bellard
        rtsp_st->stream_index = -1;
432
        dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
433 93ced3e8 Fabrice Bellard
434
        rtsp_st->sdp_ip = s1->default_ip;
435
        rtsp_st->sdp_ttl = s1->default_ttl;
436
437
        get_word(buf1, sizeof(buf1), &p); /* port */
438
        rtsp_st->sdp_port = atoi(buf1);
439
440
        get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
441 115329f1 Diego Biurrun
442 93ced3e8 Fabrice Bellard
        /* XXX: handle list of formats */
443
        get_word(buf1, sizeof(buf1), &p); /* format list */
444
        rtsp_st->sdp_payload_type = atoi(buf1);
445
446 d1ccf0e0 Romain Degez
        if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
447 8b1ab7bf Fabrice Bellard
            /* no corresponding stream */
448
        } else {
449
            st = av_new_stream(s, 0);
450
            if (!st)
451
                return;
452
            st->priv_data = rtsp_st;
453
            rtsp_st->stream_index = st->index;
454 01f4895c Michael Niedermayer
            st->codec->codec_type = codec_type;
455 d1ccf0e0 Romain Degez
            if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
456 8b1ab7bf Fabrice Bellard
                /* if standard payload type, we can find the codec right now */
457 01f4895c Michael Niedermayer
                rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
458 8b1ab7bf Fabrice Bellard
            }
459
        }
460 1617ad97 Fabrice Bellard
        /* put a default control url */
461
        pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
462
        break;
463
    case 'a':
464
        if (strstart(p, "control:", &p) && s->nb_streams > 0) {
465
            char proto[32];
466
            /* get the control url */
467
            st = s->streams[s->nb_streams - 1];
468
            rtsp_st = st->priv_data;
469 115329f1 Diego Biurrun
470 1617ad97 Fabrice Bellard
            /* XXX: may need to add full url resolution */
471 6ba5cbc6 Petr Doubek
            url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
472 1617ad97 Fabrice Bellard
            if (proto[0] == '\0') {
473
                /* relative control URL */
474
                pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
475
                pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
476
            } else {
477
                pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
478
            }
479 93ced3e8 Fabrice Bellard
        } else if (strstart(p, "rtpmap:", &p)) {
480
            /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
481 115329f1 Diego Biurrun
            get_word(buf1, sizeof(buf1), &p);
482 93ced3e8 Fabrice Bellard
            payload_type = atoi(buf1);
483
            for(i = 0; i < s->nb_streams;i++) {
484
                st = s->streams[i];
485
                rtsp_st = st->priv_data;
486
                if (rtsp_st->sdp_payload_type == payload_type) {
487 4934884a Ryan Martell
                    sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
488 93ced3e8 Fabrice Bellard
                }
489
            }
490
        } else if (strstart(p, "fmtp:", &p)) {
491
            /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
492 115329f1 Diego Biurrun
            get_word(buf1, sizeof(buf1), &p);
493 93ced3e8 Fabrice Bellard
            payload_type = atoi(buf1);
494
            for(i = 0; i < s->nb_streams;i++) {
495
                st = s->streams[i];
496
                rtsp_st = st->priv_data;
497
                if (rtsp_st->sdp_payload_type == payload_type) {
498 4934884a Ryan Martell
                    if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
499
                        if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
500
                            sdp_parse_fmtp(st, p);
501
                        }
502
                    } else {
503 ed787542 Ryan Martell
                        sdp_parse_fmtp(st, p);
504 4934884a Ryan Martell
                    }
505 93ced3e8 Fabrice Bellard
                }
506
            }
507 d0deedcb Ryan Martell
        } else if(strstart(p, "framesize:", &p)) {
508
            // let dynamic protocol handlers have a stab at the line.
509
            get_word(buf1, sizeof(buf1), &p);
510
            payload_type = atoi(buf1);
511
            for(i = 0; i < s->nb_streams;i++) {
512
                st = s->streams[i];
513
                rtsp_st = st->priv_data;
514
                if (rtsp_st->sdp_payload_type == payload_type) {
515
                    if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
516
                        rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
517
                    }
518
                }
519
            }
520 31693e00 Ryan Martell
        } else if(strstart(p, "range:", &p)) {
521
            int64_t start, end;
522
523
            // this is so that seeking on a streamed file can work.
524
            rtsp_parse_range_npt(p, &start, &end);
525
            s->start_time= start;
526
            s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
527 1617ad97 Fabrice Bellard
        }
528
        break;
529
    }
530
}
531
532 5c91a675 Zdenek Kabelac
static int sdp_parse(AVFormatContext *s, const char *content)
533 1617ad97 Fabrice Bellard
{
534
    const char *p;
535
    int letter;
536
    char buf[1024], *q;
537 93ced3e8 Fabrice Bellard
    SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
538 115329f1 Diego Biurrun
539 93ced3e8 Fabrice Bellard
    memset(s1, 0, sizeof(SDPParseState));
540 1617ad97 Fabrice Bellard
    p = content;
541
    for(;;) {
542
        skip_spaces(&p);
543
        letter = *p;
544
        if (letter == '\0')
545
            break;
546
        p++;
547
        if (*p != '=')
548
            goto next_line;
549
        p++;
550
        /* get the content */
551
        q = buf;
552 b6892136 Fabrice Bellard
        while (*p != '\n' && *p != '\r' && *p != '\0') {
553 1617ad97 Fabrice Bellard
            if ((q - buf) < sizeof(buf) - 1)
554
                *q++ = *p;
555
            p++;
556
        }
557
        *q = '\0';
558 93ced3e8 Fabrice Bellard
        sdp_parse_line(s, s1, letter, buf);
559 1617ad97 Fabrice Bellard
    next_line:
560
        while (*p != '\n' && *p != '\0')
561
            p++;
562
        if (*p == '\n')
563
            p++;
564
    }
565
    return 0;
566
}
567
568
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
569
{
570
    const char *p;
571
    int v;
572
573
    p = *pp;
574
    skip_spaces(&p);
575
    v = strtol(p, (char **)&p, 10);
576
    if (*p == '-') {
577
        p++;
578
        *min_ptr = v;
579
        v = strtol(p, (char **)&p, 10);
580
        *max_ptr = v;
581
    } else {
582
        *min_ptr = v;
583
        *max_ptr = v;
584
    }
585
    *pp = p;
586
}
587
588
/* XXX: only one transport specification is parsed */
589
static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
590
{
591
    char transport_protocol[16];
592
    char profile[16];
593
    char lower_transport[16];
594
    char parameter[16];
595
    RTSPTransportField *th;
596
    char buf[256];
597 115329f1 Diego Biurrun
598 1617ad97 Fabrice Bellard
    reply->nb_transports = 0;
599 115329f1 Diego Biurrun
600 1617ad97 Fabrice Bellard
    for(;;) {
601
        skip_spaces(&p);
602
        if (*p == '\0')
603
            break;
604
605
        th = &reply->transports[reply->nb_transports];
606
607 115329f1 Diego Biurrun
        get_word_sep(transport_protocol, sizeof(transport_protocol),
608 1617ad97 Fabrice Bellard
                     "/", &p);
609
        if (*p == '/')
610
            p++;
611
        get_word_sep(profile, sizeof(profile), "/;,", &p);
612
        lower_transport[0] = '\0';
613
        if (*p == '/') {
614 b6892136 Fabrice Bellard
            p++;
615 115329f1 Diego Biurrun
            get_word_sep(lower_transport, sizeof(lower_transport),
616 1617ad97 Fabrice Bellard
                         ";,", &p);
617
        }
618 b6892136 Fabrice Bellard
        if (!strcasecmp(lower_transport, "TCP"))
619 1617ad97 Fabrice Bellard
            th->protocol = RTSP_PROTOCOL_RTP_TCP;
620
        else
621
            th->protocol = RTSP_PROTOCOL_RTP_UDP;
622 115329f1 Diego Biurrun
623 1617ad97 Fabrice Bellard
        if (*p == ';')
624
            p++;
625
        /* get each parameter */
626
        while (*p != '\0' && *p != ',') {
627
            get_word_sep(parameter, sizeof(parameter), "=;,", &p);
628
            if (!strcmp(parameter, "port")) {
629
                if (*p == '=') {
630
                    p++;
631
                    rtsp_parse_range(&th->port_min, &th->port_max, &p);
632
                }
633
            } else if (!strcmp(parameter, "client_port")) {
634
                if (*p == '=') {
635
                    p++;
636 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->client_port_min,
637 1617ad97 Fabrice Bellard
                                     &th->client_port_max, &p);
638
                }
639
            } else if (!strcmp(parameter, "server_port")) {
640
                if (*p == '=') {
641
                    p++;
642 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->server_port_min,
643 1617ad97 Fabrice Bellard
                                     &th->server_port_max, &p);
644
                }
645
            } else if (!strcmp(parameter, "interleaved")) {
646
                if (*p == '=') {
647
                    p++;
648 115329f1 Diego Biurrun
                    rtsp_parse_range(&th->interleaved_min,
649 1617ad97 Fabrice Bellard
                                     &th->interleaved_max, &p);
650
                }
651
            } else if (!strcmp(parameter, "multicast")) {
652
                if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
653
                    th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
654
            } else if (!strcmp(parameter, "ttl")) {
655
                if (*p == '=') {
656
                    p++;
657
                    th->ttl = strtol(p, (char **)&p, 10);
658
                }
659
            } else if (!strcmp(parameter, "destination")) {
660
                struct in_addr ipaddr;
661
662
                if (*p == '=') {
663
                    p++;
664
                    get_word_sep(buf, sizeof(buf), ";,", &p);
665 115329f1 Diego Biurrun
                    if (inet_aton(buf, &ipaddr))
666 1617ad97 Fabrice Bellard
                        th->destination = ntohl(ipaddr.s_addr);
667
                }
668
            }
669
            while (*p != ';' && *p != '\0' && *p != ',')
670
                p++;
671
            if (*p == ';')
672
                p++;
673
        }
674
        if (*p == ',')
675
            p++;
676
677
        reply->nb_transports++;
678
    }
679
}
680
681
void rtsp_parse_line(RTSPHeader *reply, const char *buf)
682
{
683
    const char *p;
684
685
    /* NOTE: we do case independent match for broken servers */
686
    p = buf;
687
    if (stristart(p, "Session:", &p)) {
688
        get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
689
    } else if (stristart(p, "Content-Length:", &p)) {
690
        reply->content_length = strtol(p, NULL, 10);
691
    } else if (stristart(p, "Transport:", &p)) {
692
        rtsp_parse_transport(reply, p);
693
    } else if (stristart(p, "CSeq:", &p)) {
694
        reply->seq = strtol(p, NULL, 10);
695 ff762d6e Fabrice Bellard
    } else if (stristart(p, "Range:", &p)) {
696 31693e00 Ryan Martell
        rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
697 1617ad97 Fabrice Bellard
    }
698
}
699
700 2a42b5c3 Leon van Stuivenberg
static int url_readbuf(URLContext *h, unsigned char *buf, int size)
701
{
702
    int ret, len;
703
704
    len = 0;
705
    while (len < size) {
706
        ret = url_read(h, buf+len, size-len);
707
        if (ret < 1)
708
            return ret;
709
        len += ret;
710
    }
711
    return len;
712
}
713
714 b7b8fc34 Fabrice Bellard
/* skip a RTP/TCP interleaved packet */
715
static void rtsp_skip_packet(AVFormatContext *s)
716
{
717
    RTSPState *rt = s->priv_data;
718
    int ret, len, len1;
719
    uint8_t buf[1024];
720
721 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, 3);
722 b7b8fc34 Fabrice Bellard
    if (ret != 3)
723
        return;
724
    len = (buf[1] << 8) | buf[2];
725
#ifdef DEBUG
726
    printf("skipping RTP packet len=%d\n", len);
727
#endif
728
    /* skip payload */
729
    while (len > 0) {
730
        len1 = len;
731
        if (len1 > sizeof(buf))
732
            len1 = sizeof(buf);
733 2a42b5c3 Leon van Stuivenberg
        ret = url_readbuf(rt->rtsp_hd, buf, len1);
734 b7b8fc34 Fabrice Bellard
        if (ret != len1)
735
            return;
736
        len -= len1;
737
    }
738
}
739 1617ad97 Fabrice Bellard
740 115329f1 Diego Biurrun
static void rtsp_send_cmd(AVFormatContext *s,
741
                          const char *cmd, RTSPHeader *reply,
742 1617ad97 Fabrice Bellard
                          unsigned char **content_ptr)
743
{
744
    RTSPState *rt = s->priv_data;
745
    char buf[4096], buf1[1024], *q;
746
    unsigned char ch;
747
    const char *p;
748
    int content_length, line_count;
749
    unsigned char *content = NULL;
750
751
    memset(reply, 0, sizeof(RTSPHeader));
752
753
    rt->seq++;
754
    pstrcpy(buf, sizeof(buf), cmd);
755 b6892136 Fabrice Bellard
    snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
756 1617ad97 Fabrice Bellard
    pstrcat(buf, sizeof(buf), buf1);
757
    if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
758 b6892136 Fabrice Bellard
        snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
759 1617ad97 Fabrice Bellard
        pstrcat(buf, sizeof(buf), buf1);
760
    }
761 b6892136 Fabrice Bellard
    pstrcat(buf, sizeof(buf), "\r\n");
762 1617ad97 Fabrice Bellard
#ifdef DEBUG
763
    printf("Sending:\n%s--\n", buf);
764
#endif
765
    url_write(rt->rtsp_hd, buf, strlen(buf));
766
767
    /* parse reply (XXX: use buffers) */
768
    line_count = 0;
769
    rt->last_reply[0] = '\0';
770
    for(;;) {
771
        q = buf;
772
        for(;;) {
773 2a42b5c3 Leon van Stuivenberg
            if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
774 1617ad97 Fabrice Bellard
                break;
775
            if (ch == '\n')
776
                break;
777 b7b8fc34 Fabrice Bellard
            if (ch == '$') {
778
                /* XXX: only parse it if first char on line ? */
779
                rtsp_skip_packet(s);
780
            } else if (ch != '\r') {
781 1617ad97 Fabrice Bellard
                if ((q - buf) < sizeof(buf) - 1)
782
                    *q++ = ch;
783
            }
784
        }
785
        *q = '\0';
786
#ifdef DEBUG
787
        printf("line='%s'\n", buf);
788
#endif
789
        /* test if last line */
790
        if (buf[0] == '\0')
791
            break;
792
        p = buf;
793
        if (line_count == 0) {
794
            /* get reply code */
795
            get_word(buf1, sizeof(buf1), &p);
796
            get_word(buf1, sizeof(buf1), &p);
797
            reply->status_code = atoi(buf1);
798
        } else {
799
            rtsp_parse_line(reply, p);
800
            pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
801
            pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
802
        }
803
        line_count++;
804
    }
805 115329f1 Diego Biurrun
806 1617ad97 Fabrice Bellard
    if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
807
        pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
808 115329f1 Diego Biurrun
809 1617ad97 Fabrice Bellard
    content_length = reply->content_length;
810
    if (content_length > 0) {
811
        /* leave some room for a trailing '\0' (useful for simple parsing) */
812
        content = av_malloc(content_length + 1);
813 2a42b5c3 Leon van Stuivenberg
        (void)url_readbuf(rt->rtsp_hd, content, content_length);
814 1617ad97 Fabrice Bellard
        content[content_length] = '\0';
815
    }
816
    if (content_ptr)
817
        *content_ptr = content;
818
}
819
820
821
void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
822
{
823
    ff_rtsp_callback = rtsp_cb;
824
}
825
826
827 8b1ab7bf Fabrice Bellard
/* close and free RTSP streams */
828
static void rtsp_close_streams(RTSPState *rt)
829
{
830
    int i;
831
    RTSPStream *rtsp_st;
832
833
    for(i=0;i<rt->nb_rtsp_streams;i++) {
834
        rtsp_st = rt->rtsp_streams[i];
835
        if (rtsp_st) {
836
            if (rtsp_st->rtp_ctx)
837
                rtp_parse_close(rtsp_st->rtp_ctx);
838
            if (rtsp_st->rtp_handle)
839
                url_close(rtsp_st->rtp_handle);
840 4934884a Ryan Martell
            if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
841
                rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
842 8b1ab7bf Fabrice Bellard
        }
843
        av_free(rtsp_st);
844
    }
845
    av_free(rt->rtsp_streams);
846
}
847
848 1617ad97 Fabrice Bellard
static int rtsp_read_header(AVFormatContext *s,
849
                            AVFormatParameters *ap)
850
{
851
    RTSPState *rt = s->priv_data;
852
    char host[1024], path[1024], tcpname[1024], cmd[2048];
853
    URLContext *rtsp_hd;
854 d1ccf0e0 Romain Degez
    int port, i, j, ret, err;
855 1617ad97 Fabrice Bellard
    RTSPHeader reply1, *reply = &reply1;
856
    unsigned char *content = NULL;
857
    RTSPStream *rtsp_st;
858
    int protocol_mask;
859 8b1ab7bf Fabrice Bellard
    AVStream *st;
860 1617ad97 Fabrice Bellard
861
    /* extract hostname and port */
862 6ba5cbc6 Petr Doubek
    url_split(NULL, 0, NULL, 0,
863 1617ad97 Fabrice Bellard
              host, sizeof(host), &port, path, sizeof(path), s->filename);
864
    if (port < 0)
865
        port = RTSP_DEFAULT_PORT;
866
867
    /* open the tcp connexion */
868
    snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
869
    if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
870
        return AVERROR_IO;
871
    rt->rtsp_hd = rtsp_hd;
872
    rt->seq = 0;
873 115329f1 Diego Biurrun
874 1617ad97 Fabrice Bellard
    /* describe the stream */
875 115329f1 Diego Biurrun
    snprintf(cmd, sizeof(cmd),
876 b6892136 Fabrice Bellard
             "DESCRIBE %s RTSP/1.0\r\n"
877
             "Accept: application/sdp\r\n",
878 1617ad97 Fabrice Bellard
             s->filename);
879
    rtsp_send_cmd(s, cmd, reply, &content);
880
    if (!content) {
881
        err = AVERROR_INVALIDDATA;
882
        goto fail;
883
    }
884
    if (reply->status_code != RTSP_STATUS_OK) {
885
        err = AVERROR_INVALIDDATA;
886
        goto fail;
887
    }
888 115329f1 Diego Biurrun
889 1617ad97 Fabrice Bellard
    /* now we got the SDP description, we parse it */
890
    ret = sdp_parse(s, (const char *)content);
891
    av_freep(&content);
892
    if (ret < 0) {
893
        err = AVERROR_INVALIDDATA;
894
        goto fail;
895
    }
896 115329f1 Diego Biurrun
897 1617ad97 Fabrice Bellard
    protocol_mask = rtsp_default_protocols;
898
899
    /* for each stream, make the setup request */
900
    /* XXX: we assume the same server is used for the control of each
901
       RTSP stream */
902 d1ccf0e0 Romain Degez
903
    for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
904 1617ad97 Fabrice Bellard
        char transport[2048];
905
906 8b1ab7bf Fabrice Bellard
        rtsp_st = rt->rtsp_streams[i];
907 1617ad97 Fabrice Bellard
908
        /* compute available transports */
909
        transport[0] = '\0';
910
911
        /* RTP/UDP */
912
        if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
913 85fb7b34 Fabrice Bellard
            char buf[256];
914
915
            /* first try in specified port range */
916 d1ccf0e0 Romain Degez
            if (RTSP_RTP_PORT_MIN != 0) {
917
                while(j <= RTSP_RTP_PORT_MAX) {
918 85fb7b34 Fabrice Bellard
                    snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
919 dbf30963 Thijs
                    if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
920 d1ccf0e0 Romain Degez
                        j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
921 85fb7b34 Fabrice Bellard
                        goto rtp_opened;
922 d1ccf0e0 Romain Degez
                    }
923 85fb7b34 Fabrice Bellard
                }
924 1617ad97 Fabrice Bellard
            }
925 85fb7b34 Fabrice Bellard
926 d1ccf0e0 Romain Degez
/*            then try on any port
927
**            if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
928
**                err = AVERROR_INVALIDDATA;
929
**                goto fail;
930
**            }
931
*/
932 85fb7b34 Fabrice Bellard
933
        rtp_opened:
934 8b1ab7bf Fabrice Bellard
            port = rtp_get_local_port(rtsp_st->rtp_handle);
935 1617ad97 Fabrice Bellard
            if (transport[0] != '\0')
936
                pstrcat(transport, sizeof(transport), ",");
937
            snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
938
                     "RTP/AVP/UDP;unicast;client_port=%d-%d",
939
                     port, port + 1);
940
        }
941
942
        /* RTP/TCP */
943 d1ccf0e0 Romain Degez
        else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
944 1617ad97 Fabrice Bellard
            if (transport[0] != '\0')
945
                pstrcat(transport, sizeof(transport), ",");
946
            snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
947
                     "RTP/AVP/TCP");
948
        }
949
950 d1ccf0e0 Romain Degez
        else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
951 1617ad97 Fabrice Bellard
            if (transport[0] != '\0')
952
                pstrcat(transport, sizeof(transport), ",");
953 115329f1 Diego Biurrun
            snprintf(transport + strlen(transport),
954 1617ad97 Fabrice Bellard
                     sizeof(transport) - strlen(transport) - 1,
955
                     "RTP/AVP/UDP;multicast");
956
        }
957 115329f1 Diego Biurrun
        snprintf(cmd, sizeof(cmd),
958 b6892136 Fabrice Bellard
                 "SETUP %s RTSP/1.0\r\n"
959
                 "Transport: %s\r\n",
960 1617ad97 Fabrice Bellard
                 rtsp_st->control_url, transport);
961
        rtsp_send_cmd(s, cmd, reply, NULL);
962
        if (reply->status_code != RTSP_STATUS_OK ||
963
            reply->nb_transports != 1) {
964
            err = AVERROR_INVALIDDATA;
965
            goto fail;
966
        }
967
968
        /* XXX: same protocol for all streams is required */
969
        if (i > 0) {
970
            if (reply->transports[0].protocol != rt->protocol) {
971
                err = AVERROR_INVALIDDATA;
972
                goto fail;
973
            }
974
        } else {
975
            rt->protocol = reply->transports[0].protocol;
976
        }
977
978
        /* close RTP connection if not choosen */
979
        if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
980
            (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
981 8b1ab7bf Fabrice Bellard
            url_close(rtsp_st->rtp_handle);
982
            rtsp_st->rtp_handle = NULL;
983 1617ad97 Fabrice Bellard
        }
984
985
        switch(reply->transports[0].protocol) {
986
        case RTSP_PROTOCOL_RTP_TCP:
987
            rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
988
            rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
989
            break;
990 115329f1 Diego Biurrun
991 1617ad97 Fabrice Bellard
        case RTSP_PROTOCOL_RTP_UDP:
992
            {
993
                char url[1024];
994 115329f1 Diego Biurrun
995 1617ad97 Fabrice Bellard
                /* XXX: also use address if specified */
996 115329f1 Diego Biurrun
                snprintf(url, sizeof(url), "rtp://%s:%d",
997 1617ad97 Fabrice Bellard
                         host, reply->transports[0].server_port_min);
998 8b1ab7bf Fabrice Bellard
                if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
999 1617ad97 Fabrice Bellard
                    err = AVERROR_INVALIDDATA;
1000
                    goto fail;
1001
                }
1002
            }
1003
            break;
1004
        case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1005
            {
1006
                char url[1024];
1007
                int ttl;
1008
1009
                ttl = reply->transports[0].ttl;
1010
                if (!ttl)
1011
                    ttl = 16;
1012 115329f1 Diego Biurrun
                snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1013
                         host,
1014 1617ad97 Fabrice Bellard
                         reply->transports[0].server_port_min,
1015
                         ttl);
1016 dbf30963 Thijs
                if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1017 1617ad97 Fabrice Bellard
                    err = AVERROR_INVALIDDATA;
1018
                    goto fail;
1019
                }
1020
            }
1021
            break;
1022
        }
1023 8b1ab7bf Fabrice Bellard
        /* open the RTP context */
1024
        st = NULL;
1025
        if (rtsp_st->stream_index >= 0)
1026
            st = s->streams[rtsp_st->stream_index];
1027
        if (!st)
1028
            s->ctx_flags |= AVFMTCTX_NOHEADER;
1029 dbf30963 Thijs
        rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1030 d1ccf0e0 Romain Degez
1031 8b1ab7bf Fabrice Bellard
        if (!rtsp_st->rtp_ctx) {
1032
            err = AVERROR_NOMEM;
1033
            goto fail;
1034 4934884a Ryan Martell
        } else {
1035
            if(rtsp_st->dynamic_handler) {
1036
                rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1037
                rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1038
            }
1039 8b1ab7bf Fabrice Bellard
        }
1040 1617ad97 Fabrice Bellard
    }
1041
1042
    /* use callback if available to extend setup */
1043
    if (ff_rtsp_callback) {
1044 115329f1 Diego Biurrun
        if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
1045 1617ad97 Fabrice Bellard
                             NULL, 0, rt->last_reply) < 0) {
1046
            err = AVERROR_INVALIDDATA;
1047
            goto fail;
1048
        }
1049
    }
1050 115329f1 Diego Biurrun
1051 1617ad97 Fabrice Bellard
1052 ff762d6e Fabrice Bellard
    rt->state = RTSP_STATE_IDLE;
1053
    rt->seek_timestamp = 0; /* default is to start stream at position
1054
                               zero */
1055 c04c3282 Michael Niedermayer
    if (ap->initial_pause) {
1056 ff762d6e Fabrice Bellard
        /* do not start immediately */
1057
    } else {
1058
        if (rtsp_read_play(s) < 0) {
1059
            err = AVERROR_INVALIDDATA;
1060 1617ad97 Fabrice Bellard
            goto fail;
1061
        }
1062
    }
1063
    return 0;
1064
 fail:
1065 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1066 1617ad97 Fabrice Bellard
    av_freep(&content);
1067
    url_close(rt->rtsp_hd);
1068
    return err;
1069
}
1070
1071 8b1ab7bf Fabrice Bellard
static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1072
                           uint8_t *buf, int buf_size)
1073 1617ad97 Fabrice Bellard
{
1074
    RTSPState *rt = s->priv_data;
1075 b6892136 Fabrice Bellard
    int id, len, i, ret;
1076 1617ad97 Fabrice Bellard
    RTSPStream *rtsp_st;
1077
1078 b6892136 Fabrice Bellard
#ifdef DEBUG_RTP_TCP
1079
    printf("tcp_read_packet:\n");
1080
#endif
1081 1617ad97 Fabrice Bellard
 redo:
1082
    for(;;) {
1083 2a42b5c3 Leon van Stuivenberg
        ret = url_readbuf(rt->rtsp_hd, buf, 1);
1084 b6892136 Fabrice Bellard
#ifdef DEBUG_RTP_TCP
1085
        printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1086
#endif
1087
        if (ret != 1)
1088 8b1ab7bf Fabrice Bellard
            return -1;
1089 b6892136 Fabrice Bellard
        if (buf[0] == '$')
1090 1617ad97 Fabrice Bellard
            break;
1091
    }
1092 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, 3);
1093 b6892136 Fabrice Bellard
    if (ret != 3)
1094 8b1ab7bf Fabrice Bellard
        return -1;
1095 b6892136 Fabrice Bellard
    id = buf[0];
1096
    len = (buf[1] << 8) | buf[2];
1097
#ifdef DEBUG_RTP_TCP
1098
    printf("id=%d len=%d\n", id, len);
1099
#endif
1100 8b1ab7bf Fabrice Bellard
    if (len > buf_size || len < 12)
1101 1617ad97 Fabrice Bellard
        goto redo;
1102
    /* get the data */
1103 2a42b5c3 Leon van Stuivenberg
    ret = url_readbuf(rt->rtsp_hd, buf, len);
1104 b6892136 Fabrice Bellard
    if (ret != len)
1105 8b1ab7bf Fabrice Bellard
        return -1;
1106 115329f1 Diego Biurrun
1107 1617ad97 Fabrice Bellard
    /* find the matching stream */
1108 8b1ab7bf Fabrice Bellard
    for(i = 0; i < rt->nb_rtsp_streams; i++) {
1109
        rtsp_st = rt->rtsp_streams[i];
1110 115329f1 Diego Biurrun
        if (id >= rtsp_st->interleaved_min &&
1111
            id <= rtsp_st->interleaved_max)
1112 1617ad97 Fabrice Bellard
            goto found;
1113
    }
1114
    goto redo;
1115
 found:
1116 8b1ab7bf Fabrice Bellard
    *prtsp_st = rtsp_st;
1117
    return len;
1118 1617ad97 Fabrice Bellard
}
1119
1120 115329f1 Diego Biurrun
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1121 8b1ab7bf Fabrice Bellard
                           uint8_t *buf, int buf_size)
1122 1617ad97 Fabrice Bellard
{
1123 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1124 1617ad97 Fabrice Bellard
    RTSPStream *rtsp_st;
1125
    fd_set rfds;
1126
    int fd1, fd2, fd_max, n, i, ret;
1127
    struct timeval tv;
1128
1129
    for(;;) {
1130 b7b8fc34 Fabrice Bellard
        if (url_interrupt_cb())
1131 8b1ab7bf Fabrice Bellard
            return -1;
1132 1617ad97 Fabrice Bellard
        FD_ZERO(&rfds);
1133
        fd_max = -1;
1134 8b1ab7bf Fabrice Bellard
        for(i = 0; i < rt->nb_rtsp_streams; i++) {
1135
            rtsp_st = rt->rtsp_streams[i];
1136 1617ad97 Fabrice Bellard
            /* currently, we cannot probe RTCP handle because of blocking restrictions */
1137 8b1ab7bf Fabrice Bellard
            rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1138 1617ad97 Fabrice Bellard
            if (fd1 > fd_max)
1139
                fd_max = fd1;
1140
            FD_SET(fd1, &rfds);
1141
        }
1142
        tv.tv_sec = 0;
1143 b7b8fc34 Fabrice Bellard
        tv.tv_usec = 100 * 1000;
1144 1617ad97 Fabrice Bellard
        n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1145
        if (n > 0) {
1146 8b1ab7bf Fabrice Bellard
            for(i = 0; i < rt->nb_rtsp_streams; i++) {
1147
                rtsp_st = rt->rtsp_streams[i];
1148
                rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1149 1617ad97 Fabrice Bellard
                if (FD_ISSET(fd1, &rfds)) {
1150 8b1ab7bf Fabrice Bellard
                    ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1151
                    if (ret > 0) {
1152
                        *prtsp_st = rtsp_st;
1153 1617ad97 Fabrice Bellard
                        return ret;
1154
                    }
1155
                }
1156
            }
1157
        }
1158
    }
1159
}
1160
1161
static int rtsp_read_packet(AVFormatContext *s,
1162
                            AVPacket *pkt)
1163
{
1164
    RTSPState *rt = s->priv_data;
1165 8b1ab7bf Fabrice Bellard
    RTSPStream *rtsp_st;
1166
    int ret, len;
1167
    uint8_t buf[RTP_MAX_PACKET_LENGTH];
1168
1169
    /* get next frames from the same RTP packet */
1170
    if (rt->cur_rtp) {
1171
        ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1172
        if (ret == 0) {
1173
            rt->cur_rtp = NULL;
1174
            return 0;
1175
        } else if (ret == 1) {
1176
            return 0;
1177
        } else {
1178
            rt->cur_rtp = NULL;
1179
        }
1180
    }
1181 1617ad97 Fabrice Bellard
1182 8b1ab7bf Fabrice Bellard
    /* read next RTP packet */
1183
 redo:
1184 1617ad97 Fabrice Bellard
    switch(rt->protocol) {
1185
    default:
1186
    case RTSP_PROTOCOL_RTP_TCP:
1187 8b1ab7bf Fabrice Bellard
        len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1188 1617ad97 Fabrice Bellard
        break;
1189
    case RTSP_PROTOCOL_RTP_UDP:
1190 8b1ab7bf Fabrice Bellard
    case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1191
        len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1192 dbf30963 Thijs
        if (rtsp_st->rtp_ctx)
1193
            rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1194 1617ad97 Fabrice Bellard
        break;
1195
    }
1196 8b1ab7bf Fabrice Bellard
    if (len < 0)
1197
        return AVERROR_IO;
1198
    ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1199
    if (ret < 0)
1200
        goto redo;
1201
    if (ret == 1) {
1202
        /* more packets may follow, so we save the RTP context */
1203
        rt->cur_rtp = rtsp_st->rtp_ctx;
1204
    }
1205
    return 0;
1206 1617ad97 Fabrice Bellard
}
1207
1208 ff762d6e Fabrice Bellard
static int rtsp_read_play(AVFormatContext *s)
1209 b7b8fc34 Fabrice Bellard
{
1210 ff762d6e Fabrice Bellard
    RTSPState *rt = s->priv_data;
1211 b7b8fc34 Fabrice Bellard
    RTSPHeader reply1, *reply = &reply1;
1212
    char cmd[1024];
1213
1214 bc874dae Michel Bardiaux
    av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1215 ff762d6e Fabrice Bellard
1216
    if (rt->state == RTSP_STATE_PAUSED) {
1217 115329f1 Diego Biurrun
        snprintf(cmd, sizeof(cmd),
1218 ff762d6e Fabrice Bellard
                 "PLAY %s RTSP/1.0\r\n",
1219
                 s->filename);
1220
    } else {
1221 115329f1 Diego Biurrun
        snprintf(cmd, sizeof(cmd),
1222 ff762d6e Fabrice Bellard
                 "PLAY %s RTSP/1.0\r\n"
1223
                 "Range: npt=%0.3f-\r\n",
1224
                 s->filename,
1225
                 (double)rt->seek_timestamp / AV_TIME_BASE);
1226
    }
1227 b7b8fc34 Fabrice Bellard
    rtsp_send_cmd(s, cmd, reply, NULL);
1228
    if (reply->status_code != RTSP_STATUS_OK) {
1229
        return -1;
1230
    } else {
1231 ff762d6e Fabrice Bellard
        rt->state = RTSP_STATE_PLAYING;
1232 b7b8fc34 Fabrice Bellard
        return 0;
1233
    }
1234
}
1235
1236 ff762d6e Fabrice Bellard
/* pause the stream */
1237
static int rtsp_read_pause(AVFormatContext *s)
1238 b7b8fc34 Fabrice Bellard
{
1239 ff762d6e Fabrice Bellard
    RTSPState *rt = s->priv_data;
1240 b7b8fc34 Fabrice Bellard
    RTSPHeader reply1, *reply = &reply1;
1241
    char cmd[1024];
1242
1243
    rt = s->priv_data;
1244 115329f1 Diego Biurrun
1245 ff762d6e Fabrice Bellard
    if (rt->state != RTSP_STATE_PLAYING)
1246
        return 0;
1247
1248 115329f1 Diego Biurrun
    snprintf(cmd, sizeof(cmd),
1249 ff762d6e Fabrice Bellard
             "PAUSE %s RTSP/1.0\r\n",
1250 b7b8fc34 Fabrice Bellard
             s->filename);
1251
    rtsp_send_cmd(s, cmd, reply, NULL);
1252
    if (reply->status_code != RTSP_STATUS_OK) {
1253
        return -1;
1254
    } else {
1255 ff762d6e Fabrice Bellard
        rt->state = RTSP_STATE_PAUSED;
1256 b7b8fc34 Fabrice Bellard
        return 0;
1257
    }
1258
}
1259
1260 115329f1 Diego Biurrun
static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1261 7b3c1382 Michael Niedermayer
                          int64_t timestamp, int flags)
1262 ff762d6e Fabrice Bellard
{
1263
    RTSPState *rt = s->priv_data;
1264 115329f1 Diego Biurrun
1265 ff762d6e Fabrice Bellard
    rt->seek_timestamp = timestamp;
1266
    switch(rt->state) {
1267
    default:
1268
    case RTSP_STATE_IDLE:
1269
        break;
1270
    case RTSP_STATE_PLAYING:
1271
        if (rtsp_read_play(s) != 0)
1272
            return -1;
1273
        break;
1274
    case RTSP_STATE_PAUSED:
1275
        rt->state = RTSP_STATE_IDLE;
1276
        break;
1277
    }
1278
    return 0;
1279
}
1280
1281 1617ad97 Fabrice Bellard
static int rtsp_read_close(AVFormatContext *s)
1282
{
1283
    RTSPState *rt = s->priv_data;
1284
    RTSPHeader reply1, *reply = &reply1;
1285
    char cmd[1024];
1286
1287 b6892136 Fabrice Bellard
#if 0
1288 1617ad97 Fabrice Bellard
    /* NOTE: it is valid to flush the buffer here */
1289
    if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1290
        url_fclose(&rt->rtsp_gb);
1291
    }
1292 b6892136 Fabrice Bellard
#endif
1293 115329f1 Diego Biurrun
    snprintf(cmd, sizeof(cmd),
1294 b6892136 Fabrice Bellard
             "TEARDOWN %s RTSP/1.0\r\n",
1295 1617ad97 Fabrice Bellard
             s->filename);
1296
    rtsp_send_cmd(s, cmd, reply, NULL);
1297
1298
    if (ff_rtsp_callback) {
1299 115329f1 Diego Biurrun
        ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1300 1617ad97 Fabrice Bellard
                         NULL, 0, NULL);
1301
    }
1302
1303 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1304 1617ad97 Fabrice Bellard
    url_close(rt->rtsp_hd);
1305
    return 0;
1306
}
1307
1308 d2a067d1 Måns Rullgård
AVInputFormat rtsp_demuxer = {
1309 1617ad97 Fabrice Bellard
    "rtsp",
1310
    "RTSP input format",
1311
    sizeof(RTSPState),
1312
    rtsp_probe,
1313
    rtsp_read_header,
1314
    rtsp_read_packet,
1315
    rtsp_read_close,
1316 ff762d6e Fabrice Bellard
    rtsp_read_seek,
1317 bb76a117 Måns Rullgård
    .flags = AVFMT_NOFILE,
1318 ff762d6e Fabrice Bellard
    .read_play = rtsp_read_play,
1319
    .read_pause = rtsp_read_pause,
1320 1617ad97 Fabrice Bellard
};
1321
1322 cb1fdc61 Fabrice Bellard
static int sdp_probe(AVProbeData *p1)
1323 93ced3e8 Fabrice Bellard
{
1324 0e1ceacd Michael Niedermayer
    const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1325 cb1fdc61 Fabrice Bellard
1326
    /* we look for a line beginning "c=IN IP4" */
1327 0e1ceacd Michael Niedermayer
    while (p < p_end && *p != '\0') {
1328
        if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
1329 cb1fdc61 Fabrice Bellard
            return AVPROBE_SCORE_MAX / 2;
1330 0e1ceacd Michael Niedermayer
1331
        while(p < p_end - 1 && *p != '\n') p++;
1332
        if (++p >= p_end)
1333 cb1fdc61 Fabrice Bellard
            break;
1334
        if (*p == '\r')
1335
            p++;
1336
    }
1337 93ced3e8 Fabrice Bellard
    return 0;
1338
}
1339
1340
#define SDP_MAX_SIZE 8192
1341
1342
static int sdp_read_header(AVFormatContext *s,
1343
                           AVFormatParameters *ap)
1344
{
1345 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1346 93ced3e8 Fabrice Bellard
    RTSPStream *rtsp_st;
1347
    int size, i, err;
1348
    char *content;
1349
    char url[1024];
1350 8b1ab7bf Fabrice Bellard
    AVStream *st;
1351 93ced3e8 Fabrice Bellard
1352
    /* read the whole sdp file */
1353
    /* XXX: better loading */
1354
    content = av_malloc(SDP_MAX_SIZE);
1355
    size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1356
    if (size <= 0) {
1357
        av_free(content);
1358
        return AVERROR_INVALIDDATA;
1359
    }
1360
    content[size] ='\0';
1361
1362
    sdp_parse(s, content);
1363
    av_free(content);
1364
1365
    /* open each RTP stream */
1366 8b1ab7bf Fabrice Bellard
    for(i=0;i<rt->nb_rtsp_streams;i++) {
1367
        rtsp_st = rt->rtsp_streams[i];
1368 115329f1 Diego Biurrun
1369
        snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1370
                 inet_ntoa(rtsp_st->sdp_ip),
1371 93ced3e8 Fabrice Bellard
                 rtsp_st->sdp_port,
1372
                 rtsp_st->sdp_ttl);
1373 dbf30963 Thijs
        if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1374 93ced3e8 Fabrice Bellard
            err = AVERROR_INVALIDDATA;
1375
            goto fail;
1376
        }
1377 8b1ab7bf Fabrice Bellard
        /* open the RTP context */
1378
        st = NULL;
1379
        if (rtsp_st->stream_index >= 0)
1380
            st = s->streams[rtsp_st->stream_index];
1381
        if (!st)
1382
            s->ctx_flags |= AVFMTCTX_NOHEADER;
1383 dbf30963 Thijs
        rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1384 8b1ab7bf Fabrice Bellard
        if (!rtsp_st->rtp_ctx) {
1385
            err = AVERROR_NOMEM;
1386
            goto fail;
1387 4934884a Ryan Martell
        } else {
1388
            if(rtsp_st->dynamic_handler) {
1389
                rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1390
                rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1391
            }
1392 8b1ab7bf Fabrice Bellard
        }
1393 93ced3e8 Fabrice Bellard
    }
1394
    return 0;
1395
 fail:
1396 8b1ab7bf Fabrice Bellard
    rtsp_close_streams(rt);
1397 93ced3e8 Fabrice Bellard
    return err;
1398
}
1399
1400
static int sdp_read_packet(AVFormatContext *s,
1401
                            AVPacket *pkt)
1402
{
1403 8b1ab7bf Fabrice Bellard
    return rtsp_read_packet(s, pkt);
1404 93ced3e8 Fabrice Bellard
}
1405
1406
static int sdp_read_close(AVFormatContext *s)
1407
{
1408 8b1ab7bf Fabrice Bellard
    RTSPState *rt = s->priv_data;
1409
    rtsp_close_streams(rt);
1410 93ced3e8 Fabrice Bellard
    return 0;
1411
}
1412
1413 ff70e601 Måns Rullgård
#ifdef CONFIG_SDP_DEMUXER
1414
AVInputFormat sdp_demuxer = {
1415 93ced3e8 Fabrice Bellard
    "sdp",
1416
    "SDP",
1417
    sizeof(RTSPState),
1418
    sdp_probe,
1419
    sdp_read_header,
1420
    sdp_read_packet,
1421
    sdp_read_close,
1422
};
1423 ff70e601 Måns Rullgård
#endif
1424 93ced3e8 Fabrice Bellard
1425 1617ad97 Fabrice Bellard
/* dummy redirector format (used directly in av_open_input_file now) */
1426
static int redir_probe(AVProbeData *pd)
1427
{
1428
    const char *p;
1429
    p = pd->buf;
1430
    while (redir_isspace(*p))
1431
        p++;
1432
    if (strstart(p, "http://", NULL) ||
1433
        strstart(p, "rtsp://", NULL))
1434
        return AVPROBE_SCORE_MAX;
1435
    return 0;
1436
}
1437
1438
/* called from utils.c */
1439
int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1440
{
1441
    char buf[4096], *q;
1442
    int c;
1443
    AVFormatContext *ic = NULL;
1444
1445
    /* parse each URL and try to open it */
1446
    c = url_fgetc(f);
1447
    while (c != URL_EOF) {
1448
        /* skip spaces */
1449
        for(;;) {
1450
            if (!redir_isspace(c))
1451
                break;
1452
            c = url_fgetc(f);
1453
        }
1454
        if (c == URL_EOF)
1455
            break;
1456
        /* record url */
1457
        q = buf;
1458
        for(;;) {
1459
            if (c == URL_EOF || redir_isspace(c))
1460
                break;
1461
            if ((q - buf) < sizeof(buf) - 1)
1462
                *q++ = c;
1463
            c = url_fgetc(f);
1464
        }
1465
        *q = '\0';
1466
        //printf("URL='%s'\n", buf);
1467
        /* try to open the media file */
1468
        if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1469
            break;
1470
    }
1471
    *ic_ptr = ic;
1472
    if (!ic)
1473
        return AVERROR_IO;
1474
    else
1475
        return 0;
1476
}
1477
1478 d2a067d1 Måns Rullgård
AVInputFormat redir_demuxer = {
1479 1617ad97 Fabrice Bellard
    "redir",
1480
    "Redirector format",
1481
    0,
1482
    redir_probe,
1483
    NULL,
1484
    NULL,
1485
    NULL,
1486
};