double free patch by (Måns Rullgård <mru inprovide com>)
[ffmpeg.git] / libavformat / mpegtsenc.c
1 /*
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  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  */
19 #include "avformat.h"
20
21 #include "mpegts.h"
22
23 /* write DVB SI sections */
24
25 static const uint32_t crc_table[256] = {
26         0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
27         0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
28         0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
29         0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
30         0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
31         0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
32         0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
33         0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
34         0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
35         0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
36         0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
37         0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
38         0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
39         0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
40         0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
41         0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
42         0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
43         0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
44         0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
45         0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
46         0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
47         0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
48         0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
49         0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
50         0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
51         0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
52         0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
53         0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
54         0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
55         0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
56         0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
57         0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
58         0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
59         0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
60         0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
61         0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
62         0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
63         0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
64         0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
65         0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
66         0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
67         0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
68         0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
69 };
70
71 unsigned int mpegts_crc32(const uint8_t *data, int len)
72 {
73     register int i;
74     unsigned int crc = 0xffffffff;
75     
76     for (i=0; i<len; i++)
77         crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *data++) & 0xff];
78     
79     return crc;
80 }
81
82 /*********************************************/
83 /* mpegts section writer */
84
85 typedef struct MpegTSSection {
86     int pid;
87     int cc;
88     void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
89     void *opaque;
90 } MpegTSSection;
91
92 /* NOTE: 4 bytes must be left at the end for the crc32 */
93 void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
94 {
95     unsigned int crc;
96     unsigned char packet[TS_PACKET_SIZE];
97     const unsigned char *buf_ptr;
98     unsigned char *q;
99     int first, b, len1, left;
100
101     crc = mpegts_crc32(buf, len - 4);
102     buf[len - 4] = (crc >> 24) & 0xff;
103     buf[len - 3] = (crc >> 16) & 0xff;
104     buf[len - 2] = (crc >> 8) & 0xff;
105     buf[len - 1] = (crc) & 0xff;
106     
107     /* send each packet */
108     buf_ptr = buf;
109     while (len > 0) {
110         first = (buf == buf_ptr);
111         q = packet;
112         *q++ = 0x47;
113         b = (s->pid >> 8);
114         if (first)
115             b |= 0x40;
116         *q++ = b;
117         *q++ = s->pid;
118         s->cc = (s->cc + 1) & 0xf;
119         *q++ = 0x10 | s->cc;
120         if (first)
121             *q++ = 0; /* 0 offset */
122         len1 = TS_PACKET_SIZE - (q - packet);
123         if (len1 > len) 
124             len1 = len;
125         memcpy(q, buf_ptr, len1);
126         q += len1;
127         /* add known padding data */
128         left = TS_PACKET_SIZE - (q - packet);
129         if (left > 0)
130             memset(q, 0xff, left);
131
132         s->write_packet(s, packet);
133
134         buf_ptr += len1;
135         len -= len1;
136     }
137 }
138
139 static inline void put16(uint8_t **q_ptr, int val)
140 {
141     uint8_t *q;
142     q = *q_ptr;
143     *q++ = val >> 8;
144     *q++ = val;
145     *q_ptr = q;
146 }
147
148 int mpegts_write_section1(MpegTSSection *s, int tid, int id, 
149                           int version, int sec_num, int last_sec_num,
150                           uint8_t *buf, int len)
151 {
152     uint8_t section[1024], *q;
153     unsigned int tot_len;
154     
155     tot_len = 3 + 5 + len + 4;
156     /* check if not too big */
157     if (tot_len > 1024)
158         return -1;
159
160     q = section;
161     *q++ = tid;
162     put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
163     put16(&q, id);
164     *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
165     *q++ = sec_num;
166     *q++ = last_sec_num;
167     memcpy(q, buf, len);
168     
169     mpegts_write_section(s, section, tot_len);
170     return 0;
171 }
172
173 /*********************************************/
174 /* mpegts writer */
175
176 #define DEFAULT_PMT_START_PID   0x1000
177 #define DEFAULT_START_PID       0x0100
178 #define DEFAULT_PROVIDER_NAME   "FFmpeg"
179 #define DEFAULT_SERVICE_NAME    "Service01"
180
181 /* default network id, transport stream and service identifiers */
182 #define DEFAULT_ONID            0x0001
183 #define DEFAULT_TSID            0x0001
184 #define DEFAULT_SID             0x0001
185
186 /* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
187 #define DEFAULT_PES_HEADER_FREQ 16
188 #define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
189
190 /* we retransmit the SI info at this rate */
191 #define SDT_RETRANS_TIME 500
192 #define PAT_RETRANS_TIME 100
193
194 typedef struct MpegTSWriteStream {
195     int pid; /* stream associated pid */
196     int cc;
197     int payload_index;
198     int64_t payload_pts;
199     uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
200 } MpegTSWriteStream;
201
202 typedef struct MpegTSService {
203     MpegTSSection pmt; /* MPEG2 pmt table context */
204     int pcr_pid;
205     int sid;           /* service ID */
206     char *name;
207     char *provider_name;
208 } MpegTSService;
209
210 typedef struct MpegTSWrite {
211     MpegTSSection pat; /* MPEG2 pat table */
212     MpegTSSection sdt; /* MPEG2 sdt table context */
213     MpegTSService **services;
214     int sdt_packet_count;
215     int sdt_packet_freq;
216     int pat_packet_count;
217     int pat_packet_freq;
218     int nb_services;
219     int onid;
220     int tsid;
221 } MpegTSWrite;
222
223 static void mpegts_write_pat(AVFormatContext *s)
224 {
225     MpegTSWrite *ts = s->priv_data;
226     MpegTSService *service;
227     uint8_t data[1012], *q;
228     int i;
229     
230     q = data;
231     for(i = 0; i < ts->nb_services; i++) {
232         service = ts->services[i];
233         put16(&q, service->sid);
234         put16(&q, 0xe000 | service->pmt.pid);
235     }
236     mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
237                           data, q - data);
238 }
239
240 static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
241 {
242     //    MpegTSWrite *ts = s->priv_data;
243     uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
244     int val, stream_type, i;
245
246     q = data;
247     put16(&q, 0xe000 | service->pcr_pid);
248
249     program_info_length_ptr = q;
250     q += 2; /* patched after */
251
252     /* put program info here */
253
254     val = 0xf000 | (q - program_info_length_ptr - 2);
255     program_info_length_ptr[0] = val >> 8;
256     program_info_length_ptr[1] = val;
257     
258     for(i = 0; i < s->nb_streams; i++) {
259         AVStream *st = s->streams[i];
260         MpegTSWriteStream *ts_st = st->priv_data;
261         switch(st->codec.codec_id) {
262         case CODEC_ID_MPEG1VIDEO:
263         case CODEC_ID_MPEG2VIDEO:
264             stream_type = STREAM_TYPE_VIDEO_MPEG2;
265             break;
266         case CODEC_ID_MPEG4:
267             stream_type = STREAM_TYPE_VIDEO_MPEG4;
268             break;
269         case CODEC_ID_H264:
270             stream_type = STREAM_TYPE_VIDEO_H264;
271             break;
272         case CODEC_ID_MP2:
273         case CODEC_ID_MP3:
274             stream_type = STREAM_TYPE_AUDIO_MPEG1;
275             break;
276         case CODEC_ID_AAC:
277             stream_type = STREAM_TYPE_AUDIO_AAC;
278             break;
279         case CODEC_ID_AC3:
280             stream_type = STREAM_TYPE_AUDIO_AC3;
281             break;
282         default:
283             stream_type = STREAM_TYPE_PRIVATE_DATA;
284             break;
285         }
286         *q++ = stream_type;
287         put16(&q, 0xe000 | ts_st->pid);
288         desc_length_ptr = q;
289         q += 2; /* patched after */
290
291         /* write optional descriptors here */
292
293         val = 0xf000 | (q - desc_length_ptr - 2);
294         desc_length_ptr[0] = val >> 8;
295         desc_length_ptr[1] = val;
296     }
297     mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
298                           data, q - data);
299 }   
300
301 /* NOTE: str == NULL is accepted for an empty string */
302 static void putstr8(uint8_t **q_ptr, const char *str)
303 {
304     uint8_t *q;
305     int len;
306
307     q = *q_ptr;
308     if (!str)
309         len = 0;
310     else
311         len = strlen(str);
312     *q++ = len;
313     memcpy(q, str, len);
314     q += len;
315     *q_ptr = q;
316 }
317
318 static void mpegts_write_sdt(AVFormatContext *s)
319 {
320     MpegTSWrite *ts = s->priv_data;
321     MpegTSService *service;
322     uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
323     int i, running_status, free_ca_mode, val;
324     
325     q = data;
326     put16(&q, ts->onid);
327     *q++ = 0xff;
328     for(i = 0; i < ts->nb_services; i++) {
329         service = ts->services[i];
330         put16(&q, service->sid);
331         *q++ = 0xfc | 0x00; /* currently no EIT info */
332         desc_list_len_ptr = q;
333         q += 2;
334         running_status = 4; /* running */
335         free_ca_mode = 0;
336
337         /* write only one descriptor for the service name and provider */
338         *q++ = 0x48;
339         desc_len_ptr = q;
340         q++;
341         *q++ = 0x01; /* digital television service */
342         putstr8(&q, service->provider_name);
343         putstr8(&q, service->name);
344         desc_len_ptr[0] = q - desc_len_ptr - 1;
345
346         /* fill descriptor length */
347         val = (running_status << 13) | (free_ca_mode << 12) | 
348             (q - desc_list_len_ptr - 2);
349         desc_list_len_ptr[0] = val >> 8;
350         desc_list_len_ptr[1] = val;
351     }
352     mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
353                           data, q - data);
354 }
355
356 static MpegTSService *mpegts_add_service(MpegTSWrite *ts, 
357                                          int sid, 
358                                          const char *provider_name, 
359                                          const char *name)
360 {
361     MpegTSService *service;
362
363     service = av_mallocz(sizeof(MpegTSService));
364     if (!service)
365         return NULL;
366     service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
367     service->sid = sid;
368     service->provider_name = av_strdup(provider_name);
369     service->name = av_strdup(name);
370     service->pcr_pid = 0x1fff;
371     dynarray_add(&ts->services, &ts->nb_services, service);
372     return service;
373 }
374
375 static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
376 {
377     AVFormatContext *ctx = s->opaque;
378     put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
379 }
380
381 static int mpegts_write_header(AVFormatContext *s)
382 {
383     MpegTSWrite *ts = s->priv_data;
384     MpegTSWriteStream *ts_st;
385     MpegTSService *service;
386     AVStream *st;
387     int i, total_bit_rate;
388
389     ts->tsid = DEFAULT_TSID;
390     ts->onid = DEFAULT_ONID;
391     /* allocate a single DVB service */
392     service = mpegts_add_service(ts, DEFAULT_SID, 
393                                  DEFAULT_PROVIDER_NAME, DEFAULT_SERVICE_NAME);
394     service->pmt.write_packet = section_write_packet;
395     service->pmt.opaque = s;
396
397     ts->pat.pid = PAT_PID;
398     ts->pat.cc = 0;
399     ts->pat.write_packet = section_write_packet;
400     ts->pat.opaque = s;
401
402     ts->sdt.pid = SDT_PID;
403     ts->sdt.cc = 0;
404     ts->sdt.write_packet = section_write_packet;
405     ts->sdt.opaque = s;
406
407     /* assign pids to each stream */
408     total_bit_rate = 0;
409     for(i = 0;i < s->nb_streams; i++) {
410         st = s->streams[i];
411         ts_st = av_mallocz(sizeof(MpegTSWriteStream));
412         if (!ts_st)
413             goto fail;
414         st->priv_data = ts_st;
415         ts_st->pid = DEFAULT_START_PID + i;
416         ts_st->payload_pts = AV_NOPTS_VALUE;
417         /* update PCR pid if needed */
418         if (st->codec.codec_type == CODEC_TYPE_VIDEO && 
419             service->pcr_pid == 0x1fff)
420             service->pcr_pid = ts_st->pid;
421         total_bit_rate += st->codec.bit_rate;
422     }
423     if (total_bit_rate <= 8 * 1024)
424         total_bit_rate = 8 * 1024;
425     ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) / 
426         (TS_PACKET_SIZE * 8 * 1000);
427     ts->pat_packet_freq = (total_bit_rate * PAT_RETRANS_TIME) / 
428         (TS_PACKET_SIZE * 8 * 1000);
429 #if 0
430     printf("%d %d %d\n", 
431            total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
432 #endif
433
434     /* write info at the start of the file, so that it will be fast to
435        find them */
436     mpegts_write_sdt(s);
437     mpegts_write_pat(s);
438     for(i = 0; i < ts->nb_services; i++) {
439         mpegts_write_pmt(s, ts->services[i]);
440     }
441     put_flush_packet(&s->pb);
442
443     return 0;
444
445  fail:
446     for(i = 0;i < s->nb_streams; i++) {
447         st = s->streams[i];
448         av_free(st->priv_data);
449     }
450     return -1;
451 }
452
453 /* send SDT, PAT and PMT tables regulary */
454 static void retransmit_si_info(AVFormatContext *s)
455 {
456     MpegTSWrite *ts = s->priv_data;
457     int i;
458
459     if (++ts->sdt_packet_count == ts->sdt_packet_freq) {
460         ts->sdt_packet_count = 0;
461         mpegts_write_sdt(s);
462     }
463     if (++ts->pat_packet_count == ts->pat_packet_freq) {
464         ts->pat_packet_count = 0;
465         mpegts_write_pat(s);
466         for(i = 0; i < ts->nb_services; i++) {
467             mpegts_write_pmt(s, ts->services[i]);
468         }
469     }
470 }
471
472 /* NOTE: pes_data contains all the PES packet */
473 static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
474                              const uint8_t *payload, int payload_size,
475                              int64_t pts)
476 {
477     MpegTSWriteStream *ts_st = st->priv_data;
478     uint8_t buf[TS_PACKET_SIZE];
479     uint8_t *q;
480     int val, is_start, len, ts_len, header_len;
481
482     is_start = 1;
483     while (payload_size > 0) {
484         retransmit_si_info(s);
485
486         /* prepare packet header */
487         q = buf;
488         *q++ = 0x47;
489         val = (ts_st->pid >> 8);
490         if (is_start)
491             val |= 0x40;
492         *q++ = val;
493         *q++ = ts_st->pid;
494         *q++ = 0x10 | ts_st->cc;
495         ts_st->cc = (ts_st->cc + 1) & 0xf;
496         if (is_start) {
497             /* write PES header */
498             *q++ = 0x00;
499             *q++ = 0x00;
500             *q++ = 0x01;
501             if (st->codec.codec_type == CODEC_TYPE_VIDEO)
502                 *q++ = 0xe0;
503             else
504                 *q++ = 0xc0;
505             if (pts != AV_NOPTS_VALUE)
506                 header_len = 8;
507             else
508                 header_len = 3;
509             len = payload_size + header_len;
510             *q++ = len >> 8;
511             *q++ = len;
512             *q++ = 0x80;
513             if (pts != AV_NOPTS_VALUE) {
514                 *q++ = 0x80; /* PTS only */
515                 *q++ = 0x05; /* header len */
516                 val = (0x02 << 4) | 
517                     (((pts >> 30) & 0x07) << 1) | 1;
518                 *q++ = val;
519                 val = (((pts >> 15) & 0x7fff) << 1) | 1;
520                 *q++ = val >> 8;
521                 *q++ = val;
522                 val = (((pts) & 0x7fff) << 1) | 1;
523                 *q++ = val >> 8;
524                 *q++ = val;
525             } else {
526                 *q++ = 0x00;
527                 *q++ = 0x00;
528             }
529             is_start = 0;
530         }
531         /* write header */
532         ts_len = q - buf;
533         put_buffer(&s->pb, buf, ts_len);
534         /* write data */
535         len = TS_PACKET_SIZE - ts_len;
536         if (len > payload_size)
537             len = payload_size;
538         put_buffer(&s->pb, payload, len);
539         payload += len;
540         payload_size -= len;
541         ts_len += len;
542         /* stuffing */
543         len = TS_PACKET_SIZE - ts_len;
544         if (len > 0) {
545             memset(buf, 0xff, len);
546             put_buffer(&s->pb, buf, len);
547         }
548     }
549     put_flush_packet(&s->pb);
550 }
551
552 static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
553 {
554     AVStream *st = s->streams[pkt->stream_index];
555     int size= pkt->size;
556     uint8_t *buf= pkt->data;
557     MpegTSWriteStream *ts_st = st->priv_data;
558     int len;
559
560     while (size > 0) {
561         len = DEFAULT_PES_PAYLOAD_SIZE - ts_st->payload_index;
562         if (len > size)
563             len = size;
564         memcpy(ts_st->payload + ts_st->payload_index, buf, len);
565         buf += len;
566         size -= len;
567         ts_st->payload_index += len;
568         if (ts_st->payload_pts == AV_NOPTS_VALUE)
569             ts_st->payload_pts = pkt->pts;
570         if (ts_st->payload_index >= DEFAULT_PES_PAYLOAD_SIZE) {
571             mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
572                              ts_st->payload_pts);
573             ts_st->payload_pts = AV_NOPTS_VALUE;
574             ts_st->payload_index = 0;
575         }
576     }
577     return 0;
578 }
579
580 static int mpegts_write_end(AVFormatContext *s)
581 {
582     MpegTSWrite *ts = s->priv_data;
583     MpegTSWriteStream *ts_st;
584     MpegTSService *service;
585     AVStream *st;
586     int i;
587
588     /* flush current packets */
589     for(i = 0; i < s->nb_streams; i++) {
590         st = s->streams[i];
591         ts_st = st->priv_data;
592         if (ts_st->payload_index > 0) {
593             mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
594                              ts_st->payload_pts);
595         }
596     }
597     put_flush_packet(&s->pb);
598         
599     for(i = 0; i < ts->nb_services; i++) {
600         service = ts->services[i];
601         av_freep(&service->provider_name);
602         av_freep(&service->name);
603         av_free(service);
604     }
605     av_free(ts->services);
606
607     return 0;
608 }
609
610 AVOutputFormat mpegts_mux = {
611     "mpegts",
612     "MPEG2 transport stream format",
613     "video/x-mpegts",
614     "ts",
615     sizeof(MpegTSWrite),
616     CODEC_ID_MP2,
617     CODEC_ID_MPEG2VIDEO,
618     mpegts_write_header,
619     mpegts_write_packet,
620     mpegts_write_end,
621 };