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ffmpeg / libavformat / mpegtsenc.c @ c04c3282

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1 5dbafeb7 Fabrice Bellard
/*
2
 * MPEG2 transport stream (aka DVB) mux
3
 * Copyright (c) 2003 Fabrice Bellard.
4
 *
5
 * This library is free software; you can redistribute it and/or
6
 * modify it under the terms of the GNU Lesser General Public
7
 * License as published by the Free Software Foundation; either
8
 * version 2 of the License, or (at your option) any later version.
9
 *
10
 * This library is distributed in the hope that it will be useful,
11
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13
 * Lesser General Public License for more details.
14
 *
15
 * You should have received a copy of the GNU Lesser General Public
16
 * License along with this library; if not, write to the Free Software
17 5509bffa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 5dbafeb7 Fabrice Bellard
 */
19
#include "avformat.h"
20 43a80cce Michael Niedermayer
#include "crc.h"
21 5dbafeb7 Fabrice Bellard
#include "mpegts.h"
22
23
/* write DVB SI sections */
24
25 6d276a9e Gildas Bazin
#ifdef CONFIG_MUXERS
26 5dbafeb7 Fabrice Bellard
/*********************************************/
27
/* mpegts section writer */
28
29
typedef struct MpegTSSection {
30
    int pid;
31
    int cc;
32
    void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
33
    void *opaque;
34
} MpegTSSection;
35
36
/* NOTE: 4 bytes must be left at the end for the crc32 */
37
void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
38
{
39
    unsigned int crc;
40
    unsigned char packet[TS_PACKET_SIZE];
41
    const unsigned char *buf_ptr;
42
    unsigned char *q;
43
    int first, b, len1, left;
44
45 43a80cce Michael Niedermayer
    crc = bswap_32(av_crc(av_crc04C11DB7, -1, buf, len - 4));
46 5dbafeb7 Fabrice Bellard
    buf[len - 4] = (crc >> 24) & 0xff;
47
    buf[len - 3] = (crc >> 16) & 0xff;
48
    buf[len - 2] = (crc >> 8) & 0xff;
49
    buf[len - 1] = (crc) & 0xff;
50 115329f1 Diego Biurrun
51 5dbafeb7 Fabrice Bellard
    /* send each packet */
52
    buf_ptr = buf;
53
    while (len > 0) {
54
        first = (buf == buf_ptr);
55
        q = packet;
56
        *q++ = 0x47;
57
        b = (s->pid >> 8);
58
        if (first)
59
            b |= 0x40;
60
        *q++ = b;
61
        *q++ = s->pid;
62
        s->cc = (s->cc + 1) & 0xf;
63
        *q++ = 0x10 | s->cc;
64
        if (first)
65
            *q++ = 0; /* 0 offset */
66
        len1 = TS_PACKET_SIZE - (q - packet);
67 115329f1 Diego Biurrun
        if (len1 > len)
68 5dbafeb7 Fabrice Bellard
            len1 = len;
69
        memcpy(q, buf_ptr, len1);
70
        q += len1;
71
        /* add known padding data */
72
        left = TS_PACKET_SIZE - (q - packet);
73
        if (left > 0)
74
            memset(q, 0xff, left);
75
76
        s->write_packet(s, packet);
77
78
        buf_ptr += len1;
79
        len -= len1;
80
    }
81
}
82
83
static inline void put16(uint8_t **q_ptr, int val)
84
{
85
    uint8_t *q;
86
    q = *q_ptr;
87
    *q++ = val >> 8;
88
    *q++ = val;
89
    *q_ptr = q;
90
}
91
92 115329f1 Diego Biurrun
int mpegts_write_section1(MpegTSSection *s, int tid, int id,
93 5dbafeb7 Fabrice Bellard
                          int version, int sec_num, int last_sec_num,
94
                          uint8_t *buf, int len)
95
{
96
    uint8_t section[1024], *q;
97
    unsigned int tot_len;
98 115329f1 Diego Biurrun
99 5dbafeb7 Fabrice Bellard
    tot_len = 3 + 5 + len + 4;
100
    /* check if not too big */
101
    if (tot_len > 1024)
102
        return -1;
103
104
    q = section;
105
    *q++ = tid;
106
    put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
107
    put16(&q, id);
108
    *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
109
    *q++ = sec_num;
110
    *q++ = last_sec_num;
111
    memcpy(q, buf, len);
112 115329f1 Diego Biurrun
113 5dbafeb7 Fabrice Bellard
    mpegts_write_section(s, section, tot_len);
114
    return 0;
115
}
116
117
/*********************************************/
118
/* mpegts writer */
119
120
#define DEFAULT_PMT_START_PID   0x1000
121
#define DEFAULT_START_PID       0x0100
122
#define DEFAULT_PROVIDER_NAME   "FFmpeg"
123
#define DEFAULT_SERVICE_NAME    "Service01"
124
125
/* default network id, transport stream and service identifiers */
126
#define DEFAULT_ONID            0x0001
127
#define DEFAULT_TSID            0x0001
128
#define DEFAULT_SID             0x0001
129
130
/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
131
#define DEFAULT_PES_HEADER_FREQ 16
132 69ef9450 Fabrice Bellard
#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
133 5dbafeb7 Fabrice Bellard
134
/* we retransmit the SI info at this rate */
135
#define SDT_RETRANS_TIME 500
136
#define PAT_RETRANS_TIME 100
137 8b475508 Fabrice Bellard
#define PCR_RETRANS_TIME 20
138 5dbafeb7 Fabrice Bellard
139
typedef struct MpegTSWriteStream {
140 8b475508 Fabrice Bellard
    struct MpegTSService *service;
141 5dbafeb7 Fabrice Bellard
    int pid; /* stream associated pid */
142
    int cc;
143 69ef9450 Fabrice Bellard
    int payload_index;
144
    int64_t payload_pts;
145
    uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
146 5dbafeb7 Fabrice Bellard
} MpegTSWriteStream;
147
148
typedef struct MpegTSService {
149
    MpegTSSection pmt; /* MPEG2 pmt table context */
150
    int sid;           /* service ID */
151
    char *name;
152
    char *provider_name;
153 8b475508 Fabrice Bellard
    int pcr_pid;
154
    int pcr_packet_count;
155
    int pcr_packet_freq;
156 5dbafeb7 Fabrice Bellard
} MpegTSService;
157
158
typedef struct MpegTSWrite {
159
    MpegTSSection pat; /* MPEG2 pat table */
160
    MpegTSSection sdt; /* MPEG2 sdt table context */
161
    MpegTSService **services;
162
    int sdt_packet_count;
163
    int sdt_packet_freq;
164
    int pat_packet_count;
165
    int pat_packet_freq;
166
    int nb_services;
167
    int onid;
168
    int tsid;
169
} MpegTSWrite;
170
171
static void mpegts_write_pat(AVFormatContext *s)
172
{
173
    MpegTSWrite *ts = s->priv_data;
174
    MpegTSService *service;
175
    uint8_t data[1012], *q;
176
    int i;
177 115329f1 Diego Biurrun
178 5dbafeb7 Fabrice Bellard
    q = data;
179
    for(i = 0; i < ts->nb_services; i++) {
180
        service = ts->services[i];
181
        put16(&q, service->sid);
182
        put16(&q, 0xe000 | service->pmt.pid);
183
    }
184
    mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
185
                          data, q - data);
186
}
187
188
static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
189
{
190
    //    MpegTSWrite *ts = s->priv_data;
191
    uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
192
    int val, stream_type, i;
193
194
    q = data;
195
    put16(&q, 0xe000 | service->pcr_pid);
196
197
    program_info_length_ptr = q;
198
    q += 2; /* patched after */
199
200
    /* put program info here */
201
202
    val = 0xf000 | (q - program_info_length_ptr - 2);
203
    program_info_length_ptr[0] = val >> 8;
204
    program_info_length_ptr[1] = val;
205 115329f1 Diego Biurrun
206 5dbafeb7 Fabrice Bellard
    for(i = 0; i < s->nb_streams; i++) {
207
        AVStream *st = s->streams[i];
208
        MpegTSWriteStream *ts_st = st->priv_data;
209 01f4895c Michael Niedermayer
        switch(st->codec->codec_id) {
210 278de475 Måns Rullgård
        case CODEC_ID_MPEG1VIDEO:
211
        case CODEC_ID_MPEG2VIDEO:
212
            stream_type = STREAM_TYPE_VIDEO_MPEG2;
213 5dbafeb7 Fabrice Bellard
            break;
214 278de475 Måns Rullgård
        case CODEC_ID_MPEG4:
215
            stream_type = STREAM_TYPE_VIDEO_MPEG4;
216
            break;
217
        case CODEC_ID_H264:
218
            stream_type = STREAM_TYPE_VIDEO_H264;
219
            break;
220
        case CODEC_ID_MP2:
221
        case CODEC_ID_MP3:
222 ce34182d Michael Niedermayer
            stream_type = STREAM_TYPE_AUDIO_MPEG1;
223 5dbafeb7 Fabrice Bellard
            break;
224 278de475 Måns Rullgård
        case CODEC_ID_AAC:
225
            stream_type = STREAM_TYPE_AUDIO_AAC;
226
            break;
227
        case CODEC_ID_AC3:
228
            stream_type = STREAM_TYPE_AUDIO_AC3;
229
            break;
230 5dbafeb7 Fabrice Bellard
        default:
231
            stream_type = STREAM_TYPE_PRIVATE_DATA;
232
            break;
233
        }
234
        *q++ = stream_type;
235
        put16(&q, 0xe000 | ts_st->pid);
236
        desc_length_ptr = q;
237
        q += 2; /* patched after */
238
239
        /* write optional descriptors here */
240 01f4895c Michael Niedermayer
        switch(st->codec->codec_type) {
241 8b475508 Fabrice Bellard
        case CODEC_TYPE_AUDIO:
242
            if (strlen(st->language) == 3) {
243
                *q++ = 0x0a; /* ISO 639 language descriptor */
244
                *q++ = 4;
245
                *q++ = st->language[0];
246
                *q++ = st->language[1];
247
                *q++ = st->language[2];
248
                *q++ = 0; /* undefined type */
249
            }
250
            break;
251
        case CODEC_TYPE_SUBTITLE:
252
            {
253
                const char *language;
254
                language = st->language;
255
                if (strlen(language) != 3)
256
                    language = "eng";
257
                *q++ = 0x59;
258
                *q++ = 8;
259
                *q++ = language[0];
260
                *q++ = language[1];
261
                *q++ = language[2];
262
                *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
263
                put16(&q, 1); /* page id */
264
                put16(&q, 1); /* ancillary page id */
265
            }
266
            break;
267
        }
268 5dbafeb7 Fabrice Bellard
269
        val = 0xf000 | (q - desc_length_ptr - 2);
270
        desc_length_ptr[0] = val >> 8;
271
        desc_length_ptr[1] = val;
272
    }
273
    mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
274
                          data, q - data);
275 115329f1 Diego Biurrun
}
276 5dbafeb7 Fabrice Bellard
277
/* NOTE: str == NULL is accepted for an empty string */
278
static void putstr8(uint8_t **q_ptr, const char *str)
279
{
280
    uint8_t *q;
281
    int len;
282
283
    q = *q_ptr;
284
    if (!str)
285
        len = 0;
286
    else
287
        len = strlen(str);
288
    *q++ = len;
289
    memcpy(q, str, len);
290
    q += len;
291
    *q_ptr = q;
292
}
293
294
static void mpegts_write_sdt(AVFormatContext *s)
295
{
296
    MpegTSWrite *ts = s->priv_data;
297
    MpegTSService *service;
298
    uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
299
    int i, running_status, free_ca_mode, val;
300 115329f1 Diego Biurrun
301 5dbafeb7 Fabrice Bellard
    q = data;
302
    put16(&q, ts->onid);
303
    *q++ = 0xff;
304
    for(i = 0; i < ts->nb_services; i++) {
305
        service = ts->services[i];
306
        put16(&q, service->sid);
307
        *q++ = 0xfc | 0x00; /* currently no EIT info */
308
        desc_list_len_ptr = q;
309
        q += 2;
310
        running_status = 4; /* running */
311
        free_ca_mode = 0;
312
313
        /* write only one descriptor for the service name and provider */
314
        *q++ = 0x48;
315
        desc_len_ptr = q;
316
        q++;
317
        *q++ = 0x01; /* digital television service */
318
        putstr8(&q, service->provider_name);
319
        putstr8(&q, service->name);
320
        desc_len_ptr[0] = q - desc_len_ptr - 1;
321
322
        /* fill descriptor length */
323 115329f1 Diego Biurrun
        val = (running_status << 13) | (free_ca_mode << 12) |
324 5dbafeb7 Fabrice Bellard
            (q - desc_list_len_ptr - 2);
325
        desc_list_len_ptr[0] = val >> 8;
326
        desc_list_len_ptr[1] = val;
327
    }
328
    mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
329
                          data, q - data);
330
}
331
332 115329f1 Diego Biurrun
static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
333
                                         int sid,
334
                                         const char *provider_name,
335 5dbafeb7 Fabrice Bellard
                                         const char *name)
336
{
337
    MpegTSService *service;
338
339
    service = av_mallocz(sizeof(MpegTSService));
340
    if (!service)
341
        return NULL;
342
    service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
343
    service->sid = sid;
344
    service->provider_name = av_strdup(provider_name);
345
    service->name = av_strdup(name);
346
    service->pcr_pid = 0x1fff;
347
    dynarray_add(&ts->services, &ts->nb_services, service);
348
    return service;
349
}
350
351
static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
352
{
353
    AVFormatContext *ctx = s->opaque;
354
    put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
355
}
356
357
static int mpegts_write_header(AVFormatContext *s)
358
{
359
    MpegTSWrite *ts = s->priv_data;
360
    MpegTSWriteStream *ts_st;
361
    MpegTSService *service;
362
    AVStream *st;
363
    int i, total_bit_rate;
364 8b475508 Fabrice Bellard
    const char *service_name;
365 115329f1 Diego Biurrun
366 5dbafeb7 Fabrice Bellard
    ts->tsid = DEFAULT_TSID;
367
    ts->onid = DEFAULT_ONID;
368
    /* allocate a single DVB service */
369 8b475508 Fabrice Bellard
    service_name = s->title;
370
    if (service_name[0] == '\0')
371
        service_name = DEFAULT_SERVICE_NAME;
372 115329f1 Diego Biurrun
    service = mpegts_add_service(ts, DEFAULT_SID,
373 8b475508 Fabrice Bellard
                                 DEFAULT_PROVIDER_NAME, service_name);
374 5dbafeb7 Fabrice Bellard
    service->pmt.write_packet = section_write_packet;
375
    service->pmt.opaque = s;
376
377
    ts->pat.pid = PAT_PID;
378
    ts->pat.cc = 0;
379
    ts->pat.write_packet = section_write_packet;
380
    ts->pat.opaque = s;
381
382
    ts->sdt.pid = SDT_PID;
383
    ts->sdt.cc = 0;
384
    ts->sdt.write_packet = section_write_packet;
385
    ts->sdt.opaque = s;
386
387
    /* assign pids to each stream */
388
    total_bit_rate = 0;
389
    for(i = 0;i < s->nb_streams; i++) {
390
        st = s->streams[i];
391
        ts_st = av_mallocz(sizeof(MpegTSWriteStream));
392
        if (!ts_st)
393
            goto fail;
394
        st->priv_data = ts_st;
395 8b475508 Fabrice Bellard
        ts_st->service = service;
396 5dbafeb7 Fabrice Bellard
        ts_st->pid = DEFAULT_START_PID + i;
397 69ef9450 Fabrice Bellard
        ts_st->payload_pts = AV_NOPTS_VALUE;
398 8b475508 Fabrice Bellard
        /* update PCR pid by using the first video stream */
399 115329f1 Diego Biurrun
        if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
400 5dbafeb7 Fabrice Bellard
            service->pcr_pid == 0x1fff)
401
            service->pcr_pid = ts_st->pid;
402 01f4895c Michael Niedermayer
        total_bit_rate += st->codec->bit_rate;
403 5dbafeb7 Fabrice Bellard
    }
404 115329f1 Diego Biurrun
405 8b475508 Fabrice Bellard
    /* if no video stream, use the first stream as PCR */
406
    if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
407
        ts_st = s->streams[0]->priv_data;
408
        service->pcr_pid = ts_st->pid;
409
    }
410
411 5dbafeb7 Fabrice Bellard
    if (total_bit_rate <= 8 * 1024)
412
        total_bit_rate = 8 * 1024;
413 115329f1 Diego Biurrun
    service->pcr_packet_freq = (total_bit_rate * PCR_RETRANS_TIME) /
414 8b475508 Fabrice Bellard
        (TS_PACKET_SIZE * 8 * 1000);
415 115329f1 Diego Biurrun
    ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) /
416 5dbafeb7 Fabrice Bellard
        (TS_PACKET_SIZE * 8 * 1000);
417 115329f1 Diego Biurrun
    ts->pat_packet_freq = (total_bit_rate * PAT_RETRANS_TIME) /
418 5dbafeb7 Fabrice Bellard
        (TS_PACKET_SIZE * 8 * 1000);
419
#if 0
420 115329f1 Diego Biurrun
    printf("%d %d %d\n",
421 5dbafeb7 Fabrice Bellard
           total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
422
#endif
423
424
    /* write info at the start of the file, so that it will be fast to
425
       find them */
426
    mpegts_write_sdt(s);
427
    mpegts_write_pat(s);
428
    for(i = 0; i < ts->nb_services; i++) {
429
        mpegts_write_pmt(s, ts->services[i]);
430
    }
431
    put_flush_packet(&s->pb);
432
433
    return 0;
434
435
 fail:
436
    for(i = 0;i < s->nb_streams; i++) {
437
        st = s->streams[i];
438
        av_free(st->priv_data);
439
    }
440
    return -1;
441
}
442
443
/* send SDT, PAT and PMT tables regulary */
444
static void retransmit_si_info(AVFormatContext *s)
445
{
446
    MpegTSWrite *ts = s->priv_data;
447
    int i;
448
449
    if (++ts->sdt_packet_count == ts->sdt_packet_freq) {
450
        ts->sdt_packet_count = 0;
451
        mpegts_write_sdt(s);
452
    }
453
    if (++ts->pat_packet_count == ts->pat_packet_freq) {
454
        ts->pat_packet_count = 0;
455
        mpegts_write_pat(s);
456
        for(i = 0; i < ts->nb_services; i++) {
457
            mpegts_write_pmt(s, ts->services[i]);
458
        }
459
    }
460
}
461
462 69ef9450 Fabrice Bellard
/* NOTE: pes_data contains all the PES packet */
463
static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
464
                             const uint8_t *payload, int payload_size,
465
                             int64_t pts)
466 5dbafeb7 Fabrice Bellard
{
467
    MpegTSWriteStream *ts_st = st->priv_data;
468 69ef9450 Fabrice Bellard
    uint8_t buf[TS_PACKET_SIZE];
469 5dbafeb7 Fabrice Bellard
    uint8_t *q;
470 8b475508 Fabrice Bellard
    int val, is_start, len, header_len, write_pcr, private_code;
471
    int afc_len, stuffing_len;
472
    int64_t pcr = -1; /* avoid warning */
473 5dbafeb7 Fabrice Bellard
474 69ef9450 Fabrice Bellard
    is_start = 1;
475
    while (payload_size > 0) {
476
        retransmit_si_info(s);
477 5dbafeb7 Fabrice Bellard
478 8b475508 Fabrice Bellard
        write_pcr = 0;
479
        if (ts_st->pid == ts_st->service->pcr_pid) {
480
            ts_st->service->pcr_packet_count++;
481 115329f1 Diego Biurrun
            if (ts_st->service->pcr_packet_count >=
482 8b475508 Fabrice Bellard
                ts_st->service->pcr_packet_freq) {
483
                ts_st->service->pcr_packet_count = 0;
484
                write_pcr = 1;
485
                /* XXX: this is incorrect, but at least we have a PCR
486
                   value */
487
                pcr = pts;
488
            }
489
        }
490
491 69ef9450 Fabrice Bellard
        /* prepare packet header */
492
        q = buf;
493
        *q++ = 0x47;
494
        val = (ts_st->pid >> 8);
495
        if (is_start)
496
            val |= 0x40;
497
        *q++ = val;
498
        *q++ = ts_st->pid;
499 8b475508 Fabrice Bellard
        *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
500 69ef9450 Fabrice Bellard
        ts_st->cc = (ts_st->cc + 1) & 0xf;
501 8b475508 Fabrice Bellard
        if (write_pcr) {
502
            *q++ = 7; /* AFC length */
503
            *q++ = 0x10; /* flags: PCR present */
504
            *q++ = pcr >> 25;
505
            *q++ = pcr >> 17;
506
            *q++ = pcr >> 9;
507
            *q++ = pcr >> 1;
508
            *q++ = (pcr & 1) << 7;
509
            *q++ = 0;
510
        }
511 69ef9450 Fabrice Bellard
        if (is_start) {
512
            /* write PES header */
513
            *q++ = 0x00;
514
            *q++ = 0x00;
515
            *q++ = 0x01;
516 8b475508 Fabrice Bellard
            private_code = 0;
517 01f4895c Michael Niedermayer
            if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
518 69ef9450 Fabrice Bellard
                *q++ = 0xe0;
519 01f4895c Michael Niedermayer
            } else if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
520
                       (st->codec->codec_id == CODEC_ID_MP2 ||
521
                        st->codec->codec_id == CODEC_ID_MP3)) {
522 115329f1 Diego Biurrun
                *q++ = 0xc0;
523 8b475508 Fabrice Bellard
            } else {
524
                *q++ = 0xbd;
525 01f4895c Michael Niedermayer
                if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
526 8b475508 Fabrice Bellard
                    private_code = 0x20;
527
                }
528
            }
529 69ef9450 Fabrice Bellard
            if (pts != AV_NOPTS_VALUE)
530
                header_len = 8;
531
            else
532
                header_len = 3;
533 8b475508 Fabrice Bellard
            if (private_code != 0)
534
                header_len++;
535 69ef9450 Fabrice Bellard
            len = payload_size + header_len;
536
            *q++ = len >> 8;
537
            *q++ = len;
538 8b475508 Fabrice Bellard
            val = 0x80;
539
            /* data alignment indicator is required for subtitle data */
540 01f4895c Michael Niedermayer
            if (st->codec->codec_type == CODEC_TYPE_SUBTITLE)
541 8b475508 Fabrice Bellard
                val |= 0x04;
542
            *q++ = val;
543 69ef9450 Fabrice Bellard
            if (pts != AV_NOPTS_VALUE) {
544
                *q++ = 0x80; /* PTS only */
545
                *q++ = 0x05; /* header len */
546 115329f1 Diego Biurrun
                val = (0x02 << 4) |
547 69ef9450 Fabrice Bellard
                    (((pts >> 30) & 0x07) << 1) | 1;
548
                *q++ = val;
549
                val = (((pts >> 15) & 0x7fff) << 1) | 1;
550
                *q++ = val >> 8;
551
                *q++ = val;
552
                val = (((pts) & 0x7fff) << 1) | 1;
553
                *q++ = val >> 8;
554
                *q++ = val;
555
            } else {
556 5dbafeb7 Fabrice Bellard
                *q++ = 0x00;
557
                *q++ = 0x00;
558
            }
559 8b475508 Fabrice Bellard
            if (private_code != 0)
560
                *q++ = private_code;
561 69ef9450 Fabrice Bellard
            is_start = 0;
562 5dbafeb7 Fabrice Bellard
        }
563 8b475508 Fabrice Bellard
        /* header size */
564
        header_len = q - buf;
565
        /* data len */
566
        len = TS_PACKET_SIZE - header_len;
567 69ef9450 Fabrice Bellard
        if (len > payload_size)
568
            len = payload_size;
569 8b475508 Fabrice Bellard
        stuffing_len = TS_PACKET_SIZE - header_len - len;
570
        if (stuffing_len > 0) {
571
            /* add stuffing with AFC */
572
            if (buf[3] & 0x20) {
573
                /* stuffing already present: increase its size */
574
                afc_len = buf[4] + 1;
575
                memmove(buf + 4 + afc_len + stuffing_len,
576 115329f1 Diego Biurrun
                        buf + 4 + afc_len,
577 8b475508 Fabrice Bellard
                        header_len - (4 + afc_len));
578
                buf[4] += stuffing_len;
579
                memset(buf + 4 + afc_len, 0xff, stuffing_len);
580
            } else {
581
                /* add stuffing */
582
                memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
583
                buf[3] |= 0x20;
584
                buf[4] = stuffing_len - 1;
585
                if (stuffing_len >= 2) {
586
                    buf[5] = 0x00;
587
                    memset(buf + 6, 0xff, stuffing_len - 2);
588
                }
589
            }
590
        }
591
        memcpy(buf + TS_PACKET_SIZE - len, payload, len);
592 69ef9450 Fabrice Bellard
        payload += len;
593
        payload_size -= len;
594 8b475508 Fabrice Bellard
        put_buffer(&s->pb, buf, TS_PACKET_SIZE);
595 5dbafeb7 Fabrice Bellard
    }
596
    put_flush_packet(&s->pb);
597 69ef9450 Fabrice Bellard
}
598
599 e928649b Michael Niedermayer
static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
600 69ef9450 Fabrice Bellard
{
601 e928649b Michael Niedermayer
    AVStream *st = s->streams[pkt->stream_index];
602
    int size= pkt->size;
603
    uint8_t *buf= pkt->data;
604 69ef9450 Fabrice Bellard
    MpegTSWriteStream *ts_st = st->priv_data;
605 8b475508 Fabrice Bellard
    int len, max_payload_size;
606 69ef9450 Fabrice Bellard
607 01f4895c Michael Niedermayer
    if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
608 8b475508 Fabrice Bellard
        /* for subtitle, a single PES packet must be generated */
609
        mpegts_write_pes(s, st, buf, size, pkt->pts);
610
        return 0;
611
    }
612 115329f1 Diego Biurrun
613 8b475508 Fabrice Bellard
    max_payload_size = DEFAULT_PES_PAYLOAD_SIZE;
614 69ef9450 Fabrice Bellard
    while (size > 0) {
615 8b475508 Fabrice Bellard
        len = max_payload_size - ts_st->payload_index;
616 69ef9450 Fabrice Bellard
        if (len > size)
617
            len = size;
618
        memcpy(ts_st->payload + ts_st->payload_index, buf, len);
619
        buf += len;
620
        size -= len;
621
        ts_st->payload_index += len;
622
        if (ts_st->payload_pts == AV_NOPTS_VALUE)
623 e928649b Michael Niedermayer
            ts_st->payload_pts = pkt->pts;
624 8b475508 Fabrice Bellard
        if (ts_st->payload_index >= max_payload_size) {
625 69ef9450 Fabrice Bellard
            mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
626
                             ts_st->payload_pts);
627
            ts_st->payload_pts = AV_NOPTS_VALUE;
628
            ts_st->payload_index = 0;
629
        }
630
    }
631 5dbafeb7 Fabrice Bellard
    return 0;
632
}
633
634
static int mpegts_write_end(AVFormatContext *s)
635
{
636
    MpegTSWrite *ts = s->priv_data;
637
    MpegTSWriteStream *ts_st;
638
    MpegTSService *service;
639
    AVStream *st;
640
    int i;
641
642
    /* flush current packets */
643
    for(i = 0; i < s->nb_streams; i++) {
644
        st = s->streams[i];
645
        ts_st = st->priv_data;
646 69ef9450 Fabrice Bellard
        if (ts_st->payload_index > 0) {
647
            mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
648
                             ts_st->payload_pts);
649 5dbafeb7 Fabrice Bellard
        }
650
    }
651
    put_flush_packet(&s->pb);
652 115329f1 Diego Biurrun
653 5dbafeb7 Fabrice Bellard
    for(i = 0; i < ts->nb_services; i++) {
654
        service = ts->services[i];
655
        av_freep(&service->provider_name);
656
        av_freep(&service->name);
657
        av_free(service);
658
    }
659
    av_free(ts->services);
660
661
    return 0;
662
}
663
664
AVOutputFormat mpegts_mux = {
665
    "mpegts",
666
    "MPEG2 transport stream format",
667
    "video/x-mpegts",
668
    "ts",
669
    sizeof(MpegTSWrite),
670
    CODEC_ID_MP2,
671 69ef9450 Fabrice Bellard
    CODEC_ID_MPEG2VIDEO,
672 5dbafeb7 Fabrice Bellard
    mpegts_write_header,
673
    mpegts_write_packet,
674
    mpegts_write_end,
675
};
676 6d276a9e Gildas Bazin
#endif // CONFIG_MUXERS