/*
- * MPEG2 transport stream (aka DVB) mux
- * Copyright (c) 2003 Fabrice Bellard.
+ * MPEG-2 transport stream (aka DVB) muxer
+ * Copyright (c) 2003 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include "avformat.h"
+#include "libavutil/bswap.h"
+#include "libavutil/crc.h"
+#include "libavutil/dict.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+
+#include "libavcodec/internal.h"
+
+#include "avformat.h"
+#include "avio_internal.h"
+#include "internal.h"
#include "mpegts.h"
-/* write DVB SI sections */
+#define PCR_TIME_BASE 27000000
-static uint32_t crc_table[256] = {
- 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
- 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
- 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
- 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
- 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
- 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
- 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
- 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
- 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
- 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
- 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
- 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
- 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
- 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
- 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
- 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
- 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
- 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
- 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
- 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
- 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
- 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
- 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
- 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
- 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
- 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
- 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
- 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
- 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
- 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
- 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
- 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
- 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
- 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
- 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
- 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
- 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
- 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
- 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
- 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
- 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
- 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
- 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
-};
+/* write DVB SI sections */
-unsigned int mpegts_crc32(const uint8_t *data, int len)
-{
- register int i;
- unsigned int crc = 0xffffffff;
-
- for (i=0; i<len; i++)
- crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *data++) & 0xff];
-
- return crc;
-}
+#define DVB_PRIVATE_NETWORK_START 0xff01
/*********************************************/
/* mpegts section writer */
void *opaque;
} MpegTSSection;
+typedef struct MpegTSService {
+ MpegTSSection pmt; /* MPEG-2 PMT table context */
+ int sid; /* service ID */
+ char *name;
+ char *provider_name;
+ int pcr_pid;
+ int pcr_packet_count;
+ int pcr_packet_period;
+} MpegTSService;
+
+typedef struct MpegTSWrite {
+ const AVClass *av_class;
+ MpegTSSection pat; /* MPEG-2 PAT table */
+ MpegTSSection sdt; /* MPEG-2 SDT table context */
+ MpegTSService **services;
+ int sdt_packet_count;
+ int sdt_packet_period;
+ int pat_packet_count;
+ int pat_packet_period;
+ int nb_services;
+ int onid;
+ int tsid;
+ int64_t first_pcr;
+ int mux_rate; ///< set to 1 when VBR
+ int pes_payload_size;
+
+ int transport_stream_id;
+ int original_network_id;
+ int service_id;
+
+ int pmt_start_pid;
+ int start_pid;
+ int m2ts_mode;
+
+ int reemit_pat_pmt; // backward compatibility
+
+ int pcr_period;
+#define MPEGTS_FLAG_REEMIT_PAT_PMT 0x01
+#define MPEGTS_FLAG_AAC_LATM 0x02
+#define MPEGTS_FLAG_SYSTEM_B 0x04
+ int flags;
+} MpegTSWrite;
+
+/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
+#define DEFAULT_PES_HEADER_FREQ 16
+#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
+
+/* The section length is 12 bits. The first 2 are set to 0, the remaining
+ * 10 bits should not exceed 1021. */
+#define SECTION_LENGTH 1020
+
/* NOTE: 4 bytes must be left at the end for the crc32 */
-void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
+static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
{
unsigned int crc;
unsigned char packet[TS_PACKET_SIZE];
unsigned char *q;
int first, b, len1, left;
- crc = mpegts_crc32(buf, len - 4);
+ crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
+ -1, buf, len - 4));
+
buf[len - 4] = (crc >> 24) & 0xff;
buf[len - 3] = (crc >> 16) & 0xff;
- buf[len - 2] = (crc >> 8) & 0xff;
- buf[len - 1] = (crc) & 0xff;
-
+ buf[len - 2] = (crc >> 8) & 0xff;
+ buf[len - 1] = crc & 0xff;
+
/* send each packet */
buf_ptr = buf;
while (len > 0) {
- first = (buf == buf_ptr);
- q = packet;
- *q++ = 0x47;
- b = (s->pid >> 8);
+ first = buf == buf_ptr;
+ q = packet;
+ *q++ = 0x47;
+ b = s->pid >> 8;
if (first)
b |= 0x40;
- *q++ = b;
- *q++ = s->pid;
- s->cc = (s->cc + 1) & 0xf;
- *q++ = 0x10 | s->cc;
+ *q++ = b;
+ *q++ = s->pid;
+ s->cc = s->cc + 1 & 0xf;
+ *q++ = 0x10 | s->cc;
if (first)
*q++ = 0; /* 0 offset */
len1 = TS_PACKET_SIZE - (q - packet);
- if (len1 > len)
+ if (len1 > len)
len1 = len;
memcpy(q, buf_ptr, len1);
q += len1;
s->write_packet(s, packet);
buf_ptr += len1;
- len -= len1;
+ len -= len1;
}
}
static inline void put16(uint8_t **q_ptr, int val)
{
uint8_t *q;
- q = *q_ptr;
- *q++ = val >> 8;
- *q++ = val;
+ q = *q_ptr;
+ *q++ = val >> 8;
+ *q++ = val;
*q_ptr = q;
}
-int mpegts_write_section1(MpegTSSection *s, int tid, int id,
- int version, int sec_num, int last_sec_num,
- uint8_t *buf, int len)
+static int mpegts_write_section1(MpegTSSection *s, int tid, int id,
+ int version, int sec_num, int last_sec_num,
+ uint8_t *buf, int len)
{
uint8_t section[1024], *q;
unsigned int tot_len;
-
+ /* reserved_future_use field must be set to 1 for SDT */
+ unsigned int flags = tid == SDT_TID ? 0xf000 : 0xb000;
+
tot_len = 3 + 5 + len + 4;
/* check if not too big */
if (tot_len > 1024)
- return -1;
+ return AVERROR_INVALIDDATA;
- q = section;
+ q = section;
*q++ = tid;
- put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
+ put16(&q, flags | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
put16(&q, id);
*q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
*q++ = sec_num;
*q++ = last_sec_num;
memcpy(q, buf, len);
-
+
mpegts_write_section(s, section, tot_len);
return 0;
}
/*********************************************/
/* mpegts writer */
-#define DEFAULT_PMT_START_PID 0x1000
-#define DEFAULT_START_PID 0x0100
-#define DEFAULT_PROVIDER_NAME "FFmpeg"
+#define DEFAULT_PROVIDER_NAME "Libav"
#define DEFAULT_SERVICE_NAME "Service01"
-/* default network id, transport stream and service identifiers */
-#define DEFAULT_ONID 0x0001
-#define DEFAULT_TSID 0x0001
-#define DEFAULT_SID 0x0001
-
-/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
-#define DEFAULT_PES_HEADER_FREQ 16
-
/* we retransmit the SI info at this rate */
#define SDT_RETRANS_TIME 500
#define PAT_RETRANS_TIME 100
+#define PCR_RETRANS_TIME 20
typedef struct MpegTSWriteStream {
+ struct MpegTSService *service;
int pid; /* stream associated pid */
int cc;
- int packet_index;
- int pes_packet_count;
- uint8_t packet[TS_PACKET_SIZE];
+ int payload_size;
+ int first_pts_check; ///< first pts check needed
+ int64_t payload_pts;
+ int64_t payload_dts;
+ int payload_flags;
+ uint8_t *payload;
+ AVFormatContext *amux;
+ AVRational user_tb;
} MpegTSWriteStream;
-typedef struct MpegTSService {
- MpegTSSection pmt; /* MPEG2 pmt table context */
- int pcr_pid;
- int sid; /* service ID */
- char *name;
- char *provider_name;
-} MpegTSService;
-
-typedef struct MpegTSWrite {
- MpegTSSection pat; /* MPEG2 pat table */
- MpegTSSection sdt; /* MPEG2 sdt table context */
- MpegTSService **services;
- int sdt_packet_count;
- int sdt_packet_freq;
- int pat_packet_count;
- int pat_packet_freq;
- int nb_services;
- int onid;
- int tsid;
-} MpegTSWrite;
-
static void mpegts_write_pat(AVFormatContext *s)
{
MpegTSWrite *ts = s->priv_data;
MpegTSService *service;
- uint8_t data[1012], *q;
+ uint8_t data[SECTION_LENGTH], *q;
int i;
-
+
q = data;
- for(i = 0; i < ts->nb_services; i++) {
+ for (i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
put16(&q, service->sid);
put16(&q, 0xe000 | service->pmt.pid);
static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
{
- // MpegTSWrite *ts = s->priv_data;
- uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
- int val, stream_type, i;
+ MpegTSWrite *ts = s->priv_data;
+ uint8_t data[SECTION_LENGTH], *q, *desc_length_ptr, *program_info_length_ptr;
+ int val, stream_type, i, err = 0;
q = data;
put16(&q, 0xe000 | service->pcr_pid);
val = 0xf000 | (q - program_info_length_ptr - 2);
program_info_length_ptr[0] = val >> 8;
program_info_length_ptr[1] = val;
-
- for(i = 0; i < s->nb_streams; i++) {
+
+ for (i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MpegTSWriteStream *ts_st = st->priv_data;
- switch(st->codec.codec_type) {
- case CODEC_TYPE_VIDEO:
- stream_type = STREAM_TYPE_VIDEO;
+ AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0);
+
+ if (q - data > SECTION_LENGTH - 3 - 2 - 6) {
+ err = 1;
+ break;
+ }
+ switch (st->codecpar->codec_id) {
+ case AV_CODEC_ID_MPEG1VIDEO:
+ case AV_CODEC_ID_MPEG2VIDEO:
+ stream_type = STREAM_TYPE_VIDEO_MPEG2;
+ break;
+ case AV_CODEC_ID_MPEG4:
+ stream_type = STREAM_TYPE_VIDEO_MPEG4;
+ break;
+ case AV_CODEC_ID_H264:
+ stream_type = STREAM_TYPE_VIDEO_H264;
+ break;
+ case AV_CODEC_ID_HEVC:
+ stream_type = STREAM_TYPE_VIDEO_HEVC;
+ break;
+ case AV_CODEC_ID_CAVS:
+ stream_type = STREAM_TYPE_VIDEO_CAVS;
+ break;
+ case AV_CODEC_ID_DIRAC:
+ stream_type = STREAM_TYPE_VIDEO_DIRAC;
+ break;
+ case AV_CODEC_ID_MP2:
+ case AV_CODEC_ID_MP3:
+ stream_type = STREAM_TYPE_AUDIO_MPEG1;
break;
- case CODEC_TYPE_AUDIO:
- stream_type = STREAM_TYPE_AUDIO;
+ case AV_CODEC_ID_AAC:
+ stream_type = (ts->flags & MPEGTS_FLAG_AAC_LATM)
+ ? STREAM_TYPE_AUDIO_AAC_LATM
+ : STREAM_TYPE_AUDIO_AAC;
+ break;
+ case AV_CODEC_ID_AAC_LATM:
+ stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
+ break;
+ case AV_CODEC_ID_AC3:
+ stream_type = (ts->flags & MPEGTS_FLAG_SYSTEM_B)
+ ? STREAM_TYPE_PRIVATE_DATA
+ : STREAM_TYPE_AUDIO_AC3;
break;
default:
stream_type = STREAM_TYPE_PRIVATE_DATA;
q += 2; /* patched after */
/* write optional descriptors here */
+ switch (st->codecpar->codec_type) {
+ case AVMEDIA_TYPE_AUDIO:
+ if (st->codecpar->codec_id == AV_CODEC_ID_AC3 && (ts->flags & MPEGTS_FLAG_SYSTEM_B)) {
+ *q++ = 0x6a; /* ETSI EN 300 468 AC-3 descriptor */
+ *q++ = 1;
+ *q++ = 0x00;
+ }
+
+ if (lang) {
+ char *p;
+ char *next = lang->value;
+ uint8_t *len_ptr;
+
+ *q++ = 0x0a; /* ISO 639 language descriptor */
+ len_ptr = q++;
+ *len_ptr = 0;
+
+ for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
+ if (q - data > SECTION_LENGTH - 4) {
+ err = 1;
+ break;
+ }
+ next = strchr(p, ',');
+ if (strlen(p) != 3 && (!next || next != p + 3))
+ continue; /* not a 3-letter code */
+
+ *q++ = *p++;
+ *q++ = *p++;
+ *q++ = *p++;
+
+ if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS)
+ *q++ = 0x01;
+ else if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED)
+ *q++ = 0x02;
+ else if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED)
+ *q++ = 0x03;
+ else
+ *q++ = 0; /* undefined type */
+
+ *len_ptr += 4;
+ }
+
+ if (*len_ptr == 0)
+ q -= 2; /* no language codes were written */
+ }
+ break;
+ case AVMEDIA_TYPE_SUBTITLE:
+ {
+ const char *language;
+ language = lang && strlen(lang->value) == 3 ? lang->value : "eng";
+ *q++ = 0x59;
+ *q++ = 8;
+ *q++ = language[0];
+ *q++ = language[1];
+ *q++ = language[2];
+ *q++ = 0x10; /* normal subtitles (0x20 = if hearing pb) */
+
+ if (q - data > SECTION_LENGTH - 4) {
+ err = 1;
+ break;
+ }
+
+ if (st->codecpar->extradata_size == 4) {
+ memcpy(q, st->codecpar->extradata, 4);
+ q += 4;
+ } else {
+ put16(&q, 1); /* page id */
+ put16(&q, 1); /* ancillary page id */
+ }
+ }
+ break;
+ case AVMEDIA_TYPE_VIDEO:
+ if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
+ *q++ = 0x05; /*MPEG-2 registration descriptor*/
+ *q++ = 4;
+ *q++ = 'd';
+ *q++ = 'r';
+ *q++ = 'a';
+ *q++ = 'c';
+ }
+ break;
+ }
val = 0xf000 | (q - desc_length_ptr - 2);
desc_length_ptr[0] = val >> 8;
desc_length_ptr[1] = val;
}
+
+ if (err)
+ av_log(s, AV_LOG_ERROR,
+ "The PMT section cannot fit stream %d and all following streams.\n"
+ "Try reducing the number of languages in the audio streams "
+ "or the total number of streams.\n", i);
+
mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
data, q - data);
-}
+}
/* NOTE: str == NULL is accepted for an empty string */
static void putstr8(uint8_t **q_ptr, const char *str)
len = strlen(str);
*q++ = len;
memcpy(q, str, len);
- q += len;
+ q += len;
*q_ptr = q;
}
{
MpegTSWrite *ts = s->priv_data;
MpegTSService *service;
- uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
+ uint8_t data[SECTION_LENGTH], *q, *desc_list_len_ptr, *desc_len_ptr;
int i, running_status, free_ca_mode, val;
-
+
q = data;
put16(&q, ts->onid);
*q++ = 0xff;
- for(i = 0; i < ts->nb_services; i++) {
+ for (i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
put16(&q, service->sid);
- *q++ = 0xfc | 0x00; /* currently no EIT info */
+ *q++ = 0xfc | 0x00; /* currently no EIT info */
desc_list_len_ptr = q;
- q += 2;
- running_status = 4; /* running */
- free_ca_mode = 0;
+ q += 2;
+ running_status = 4; /* running */
+ free_ca_mode = 0;
/* write only one descriptor for the service name and provider */
- *q++ = 0x48;
+ *q++ = 0x48;
desc_len_ptr = q;
q++;
- *q++ = 0x01; /* digital television service */
+ *q++ = 0x01; /* digital television service */
putstr8(&q, service->provider_name);
putstr8(&q, service->name);
desc_len_ptr[0] = q - desc_len_ptr - 1;
/* fill descriptor length */
- val = (running_status << 13) | (free_ca_mode << 12) |
- (q - desc_list_len_ptr - 2);
+ val = (running_status << 13) | (free_ca_mode << 12) |
+ (q - desc_list_len_ptr - 2);
desc_list_len_ptr[0] = val >> 8;
desc_list_len_ptr[1] = val;
}
data, q - data);
}
-static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
- int sid,
- const char *provider_name,
+static MpegTSService *mpegts_add_service(MpegTSWrite *ts, int sid,
+ const char *provider_name,
const char *name)
{
MpegTSService *service;
service = av_mallocz(sizeof(MpegTSService));
if (!service)
return NULL;
- service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
- service->sid = sid;
+ service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
+ service->sid = sid;
+ service->pcr_pid = 0x1fff;
service->provider_name = av_strdup(provider_name);
- service->name = av_strdup(name);
- service->pcr_pid = 0x1fff;
+ service->name = av_strdup(name);
+ if (!service->provider_name || !service->name) {
+ av_free(service->provider_name);
+ av_free(service->name);
+ av_free(service);
+ return NULL;
+ }
dynarray_add(&ts->services, &ts->nb_services, service);
return service;
}
+static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
+{
+ return av_rescale(avio_tell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
+ ts->first_pcr;
+}
+
+static void mpegts_prefix_m2ts_header(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ if (ts->m2ts_mode) {
+ int64_t pcr = get_pcr(s->priv_data, s->pb);
+ uint32_t tp_extra_header = pcr % 0x3fffffff;
+ tp_extra_header = AV_RB32(&tp_extra_header);
+ avio_write(s->pb, (unsigned char *) &tp_extra_header,
+ sizeof(tp_extra_header));
+ }
+}
+
static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
{
AVFormatContext *ctx = s->opaque;
- put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
+ mpegts_prefix_m2ts_header(ctx);
+ avio_write(ctx->pb, packet, TS_PACKET_SIZE);
}
static int mpegts_write_header(AVFormatContext *s)
MpegTSWrite *ts = s->priv_data;
MpegTSWriteStream *ts_st;
MpegTSService *service;
- AVStream *st;
- int i, total_bit_rate;
+ AVStream *st, *pcr_st = NULL;
+ AVDictionaryEntry *title, *provider;
+ int i, j;
+ const char *service_name;
+ const char *provider_name;
+ int *pids;
+ int ret;
+
+ if (s->max_delay < 0) /* Not set by the caller */
+ s->max_delay = 0;
+
+ // round up to a whole number of TS packets
+ ts->pes_payload_size = (ts->pes_payload_size + 14 + 183) / 184 * 184 - 14;
- ts->tsid = DEFAULT_TSID;
- ts->onid = DEFAULT_ONID;
+ ts->tsid = ts->transport_stream_id;
+ ts->onid = ts->original_network_id;
/* allocate a single DVB service */
- service = mpegts_add_service(ts, DEFAULT_SID,
- DEFAULT_PROVIDER_NAME, DEFAULT_SERVICE_NAME);
+ title = av_dict_get(s->metadata, "service_name", NULL, 0);
+ if (!title)
+ title = av_dict_get(s->metadata, "title", NULL, 0);
+ service_name = title ? title->value : DEFAULT_SERVICE_NAME;
+ provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
+ provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
+ service = mpegts_add_service(ts, ts->service_id,
+ provider_name, service_name);
+
+ if (!service)
+ return AVERROR(ENOMEM);
+
service->pmt.write_packet = section_write_packet;
- service->pmt.opaque = s;
+ service->pmt.opaque = s;
+ service->pmt.cc = 15;
- ts->pat.pid = PAT_PID;
- ts->pat.cc = 0;
+ ts->pat.pid = PAT_PID;
+ /* Initialize at 15 so that it wraps and is equal to 0 for the
+ * first packet we write. */
+ ts->pat.cc = 15;
ts->pat.write_packet = section_write_packet;
- ts->pat.opaque = s;
+ ts->pat.opaque = s;
- ts->sdt.pid = SDT_PID;
- ts->sdt.cc = 0;
+ ts->sdt.pid = SDT_PID;
+ ts->sdt.cc = 15;
ts->sdt.write_packet = section_write_packet;
- ts->sdt.opaque = s;
+ ts->sdt.opaque = s;
+
+ pids = av_malloc(s->nb_streams * sizeof(*pids));
+ if (!pids) {
+ av_free(service);
+ return AVERROR(ENOMEM);
+ }
/* assign pids to each stream */
- total_bit_rate = 0;
- for(i = 0;i < s->nb_streams; i++) {
+ for (i = 0; i < s->nb_streams; i++) {
st = s->streams[i];
+
ts_st = av_mallocz(sizeof(MpegTSWriteStream));
- if (!ts_st)
+ if (!ts_st) {
+ ret = AVERROR(ENOMEM);
goto fail;
+ }
st->priv_data = ts_st;
- ts_st->pid = DEFAULT_START_PID + i;
- /* update PCR pid if needed */
- if (st->codec.codec_type == CODEC_TYPE_VIDEO &&
- service->pcr_pid == 0x1fff)
+
+ ts_st->user_tb = st->time_base;
+ avpriv_set_pts_info(st, 33, 1, 90000);
+
+ ts_st->payload = av_mallocz(ts->pes_payload_size);
+ if (!ts_st->payload) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ ts_st->service = service;
+ /* MPEG pid values < 16 are reserved. Applications which set st->id in
+ * this range are assigned a calculated pid. */
+ if (st->id < 16) {
+ ts_st->pid = ts->start_pid + i;
+ } else if (st->id < 0x1FFF) {
+ ts_st->pid = st->id;
+ } else {
+ av_log(s, AV_LOG_ERROR,
+ "Invalid stream id %d, must be less than 8191\n", st->id);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ if (ts_st->pid == service->pmt.pid) {
+ av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ for (j = 0; j < i; j++) {
+ if (pids[j] == ts_st->pid) {
+ av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid);
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ }
+ pids[i] = ts_st->pid;
+ ts_st->payload_pts = AV_NOPTS_VALUE;
+ ts_st->payload_dts = AV_NOPTS_VALUE;
+ ts_st->first_pts_check = 1;
+ ts_st->cc = 15;
+ /* update PCR pid by using the first video stream */
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
+ service->pcr_pid == 0x1fff) {
service->pcr_pid = ts_st->pid;
- total_bit_rate += st->codec.bit_rate;
+ pcr_st = st;
+ }
+ if (st->codecpar->codec_id == AV_CODEC_ID_AAC &&
+ st->codecpar->extradata_size > 0) {
+ AVStream *ast;
+ ts_st->amux = avformat_alloc_context();
+ if (!ts_st->amux) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ ts_st->amux->oformat =
+ av_guess_format((ts->flags & MPEGTS_FLAG_AAC_LATM) ? "latm" : "adts",
+ NULL, NULL);
+ if (!ts_st->amux->oformat) {
+ ret = AVERROR(EINVAL);
+ goto fail;
+ }
+ if (!(ast = avformat_new_stream(ts_st->amux, NULL))) {
+ ret = AVERROR(ENOMEM);
+ goto fail;
+ }
+ ret = avcodec_parameters_copy(ast->codecpar, st->codecpar);
+ if (ret != 0)
+ goto fail;
+ ast->time_base = st->time_base;
+ ret = avformat_write_header(ts_st->amux, NULL);
+ if (ret < 0)
+ goto fail;
+ }
}
- if (total_bit_rate <= 8 * 1024)
- total_bit_rate = 8 * 1024;
- ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) /
- (TS_PACKET_SIZE * 8 * 1000);
- ts->pat_packet_freq = (total_bit_rate * PAT_RETRANS_TIME) /
- (TS_PACKET_SIZE * 8 * 1000);
-#if 0
- printf("%d %d %d\n",
- total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
-#endif
-
- /* write info at the start of the file, so that it will be fast to
- find them */
- mpegts_write_sdt(s);
- mpegts_write_pat(s);
- for(i = 0; i < ts->nb_services; i++) {
- mpegts_write_pmt(s, ts->services[i]);
+
+ av_free(pids);
+
+ /* if no video stream, use the first stream as PCR */
+ if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
+ pcr_st = s->streams[0];
+ ts_st = pcr_st->priv_data;
+ service->pcr_pid = ts_st->pid;
+ } else
+ ts_st = pcr_st->priv_data;
+
+ if (ts->mux_rate > 1) {
+ service->pcr_packet_period = (ts->mux_rate * ts->pcr_period) /
+ (TS_PACKET_SIZE * 8 * 1000);
+ ts->sdt_packet_period = (ts->mux_rate * SDT_RETRANS_TIME) /
+ (TS_PACKET_SIZE * 8 * 1000);
+ ts->pat_packet_period = (ts->mux_rate * PAT_RETRANS_TIME) /
+ (TS_PACKET_SIZE * 8 * 1000);
+
+ ts->first_pcr = av_rescale(s->max_delay, PCR_TIME_BASE, AV_TIME_BASE);
+ } else {
+ /* Arbitrary values, PAT/PMT could be written on key frames */
+ ts->sdt_packet_period = 200;
+ ts->pat_packet_period = 40;
+ if (pcr_st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
+ int frame_size = av_get_audio_frame_duration2(pcr_st->codecpar, 0);
+ if (!frame_size) {
+ av_log(s, AV_LOG_WARNING, "frame size not set\n");
+ service->pcr_packet_period =
+ pcr_st->codecpar->sample_rate / (10 * 512);
+ } else {
+ service->pcr_packet_period =
+ pcr_st->codecpar->sample_rate / (10 * frame_size);
+ }
+ } else {
+ // max delta PCR 0.1s
+ // TODO: should be avg_frame_rate
+ service->pcr_packet_period =
+ ts_st->user_tb.den / (10 * ts_st->user_tb.num);
+ }
}
- put_flush_packet(&s->pb);
+
+ // output a PCR as soon as possible
+ service->pcr_packet_count = service->pcr_packet_period;
+ ts->pat_packet_count = ts->pat_packet_period - 1;
+ ts->sdt_packet_count = ts->sdt_packet_period - 1;
+
+ if (ts->mux_rate == 1)
+ av_log(s, AV_LOG_VERBOSE, "muxrate VBR, ");
+ else
+ av_log(s, AV_LOG_VERBOSE, "muxrate %d, ", ts->mux_rate);
+ av_log(s, AV_LOG_VERBOSE,
+ "pcr every %d pkts, sdt every %d, pat/pmt every %d pkts\n",
+ service->pcr_packet_period,
+ ts->sdt_packet_period, ts->pat_packet_period);
+
+ if (ts->m2ts_mode == -1) {
+ if (av_match_ext(s->filename, "m2ts")) {
+ ts->m2ts_mode = 1;
+ } else {
+ ts->m2ts_mode = 0;
+ }
+ }
+
+ avio_flush(s->pb);
return 0;
- fail:
- for(i = 0;i < s->nb_streams; i++) {
- st = s->streams[i];
- av_free(st->priv_data);
+fail:
+ av_free(service);
+ av_free(pids);
+ for (i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ ts_st = st->priv_data;
+ if (ts_st) {
+ av_freep(&ts_st->payload);
+ if (ts_st->amux) {
+ avformat_free_context(ts_st->amux);
+ ts_st->amux = NULL;
+ }
+ }
+ av_freep(&st->priv_data);
}
- return -1;
+ return ret;
}
-/* send SDT, PAT and PMT tables regulary */
+/* send SDT, PAT and PMT tables regularly */
static void retransmit_si_info(AVFormatContext *s)
{
MpegTSWrite *ts = s->priv_data;
int i;
- if (++ts->sdt_packet_count == ts->sdt_packet_freq) {
+ if (++ts->sdt_packet_count == ts->sdt_packet_period) {
ts->sdt_packet_count = 0;
mpegts_write_sdt(s);
}
- if (++ts->pat_packet_count == ts->pat_packet_freq) {
+ if (++ts->pat_packet_count == ts->pat_packet_period) {
ts->pat_packet_count = 0;
mpegts_write_pat(s);
- for(i = 0; i < ts->nb_services; i++) {
+ for (i = 0; i < ts->nb_services; i++)
mpegts_write_pmt(s, ts->services[i]);
- }
}
}
-static int mpegts_write_packet(AVFormatContext *s, int stream_index,
- uint8_t *buf, int size, int pts1)
+static int write_pcr_bits(uint8_t *buf, int64_t pcr)
+{
+ int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
+
+ *buf++ = pcr_high >> 25;
+ *buf++ = pcr_high >> 17;
+ *buf++ = pcr_high >> 9;
+ *buf++ = pcr_high >> 1;
+ *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
+ *buf++ = pcr_low;
+
+ return 6;
+}
+
+/* Write a single null transport stream packet */
+static void mpegts_insert_null_packet(AVFormatContext *s)
+{
+ uint8_t *q;
+ uint8_t buf[TS_PACKET_SIZE];
+
+ q = buf;
+ *q++ = 0x47;
+ *q++ = 0x00 | 0x1f;
+ *q++ = 0xff;
+ *q++ = 0x10;
+ memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
+ mpegts_prefix_m2ts_header(s);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
+}
+
+/* Write a single transport stream packet with a PCR and no payload */
+static void mpegts_insert_pcr_only(AVFormatContext *s, AVStream *st)
{
- AVStream *st = s->streams[stream_index];
+ MpegTSWrite *ts = s->priv_data;
MpegTSWriteStream *ts_st = st->priv_data;
uint8_t *q;
- int val, write_pts, is_start, len;
- int64_t pts;
+ uint8_t buf[TS_PACKET_SIZE];
- while (size > 0) {
- if (ts_st->packet_index == 0) {
- retransmit_si_info(s);
+ q = buf;
+ *q++ = 0x47;
+ *q++ = ts_st->pid >> 8;
+ *q++ = ts_st->pid;
+ *q++ = 0x20 | ts_st->cc; /* Adaptation only */
+ /* Continuity Count field does not increment (see 13818-1 section 2.4.3.3) */
+ *q++ = TS_PACKET_SIZE - 5; /* Adaptation Field Length */
+ *q++ = 0x10; /* Adaptation flags: PCR present */
- /* new PES header ? */
- is_start = 0;
- if (++ts_st->pes_packet_count == DEFAULT_PES_HEADER_FREQ) {
- ts_st->pes_packet_count = 0;
- is_start = 1;
+ /* PCR coded into 6 bytes */
+ q += write_pcr_bits(q, get_pcr(ts, s->pb));
+
+ /* stuffing bytes */
+ memset(q, 0xFF, TS_PACKET_SIZE - (q - buf));
+ mpegts_prefix_m2ts_header(s);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
+}
+
+static void write_pts(uint8_t *q, int fourbits, int64_t pts)
+{
+ int val;
+
+ val = fourbits << 4 | (((pts >> 30) & 0x07) << 1) | 1;
+ *q++ = val;
+ val = (((pts >> 15) & 0x7fff) << 1) | 1;
+ *q++ = val >> 8;
+ *q++ = val;
+ val = (((pts) & 0x7fff) << 1) | 1;
+ *q++ = val >> 8;
+ *q++ = val;
+}
+
+/* Set an adaptation field flag in an MPEG-TS packet*/
+static void set_af_flag(uint8_t *pkt, int flag)
+{
+ // expect at least one flag to set
+ assert(flag);
+
+ if ((pkt[3] & 0x20) == 0) {
+ // no AF yet, set adaptation field flag
+ pkt[3] |= 0x20;
+ // 1 byte length, no flags
+ pkt[4] = 1;
+ pkt[5] = 0;
+ }
+ pkt[5] |= flag;
+}
+
+/* Extend the adaptation field by size bytes */
+static void extend_af(uint8_t *pkt, int size)
+{
+ // expect already existing adaptation field
+ assert(pkt[3] & 0x20);
+ pkt[4] += size;
+}
+
+/* Get a pointer to MPEG-TS payload (right after TS packet header) */
+static uint8_t *get_ts_payload_start(uint8_t *pkt)
+{
+ if (pkt[3] & 0x20)
+ return pkt + 5 + pkt[4];
+ else
+ return pkt + 4;
+}
+
+/* Add a PES header to the front of the payload, and segment into an integer
+ * number of TS packets. The final TS packet is padded using an oversized
+ * adaptation header to exactly fill the last TS packet.
+ * NOTE: 'payload' contains a complete PES payload. */
+static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
+ const uint8_t *payload, int payload_size,
+ int64_t pts, int64_t dts, int key)
+{
+ MpegTSWriteStream *ts_st = st->priv_data;
+ MpegTSWrite *ts = s->priv_data;
+ uint8_t buf[TS_PACKET_SIZE];
+ uint8_t *q;
+ int val, is_start, len, header_len, write_pcr, private_code, flags;
+ int afc_len, stuffing_len;
+ int64_t pcr = -1; /* avoid warning */
+ int64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
+
+ is_start = 1;
+ while (payload_size > 0) {
+ retransmit_si_info(s);
+
+ write_pcr = 0;
+ if (ts_st->pid == ts_st->service->pcr_pid) {
+ if (ts->mux_rate > 1 || is_start) // VBR pcr period is based on frames
+ ts_st->service->pcr_packet_count++;
+ if (ts_st->service->pcr_packet_count >=
+ ts_st->service->pcr_packet_period) {
+ ts_st->service->pcr_packet_count = 0;
+ write_pcr = 1;
}
- /* prepare packet header */
- q = ts_st->packet;
- *q++ = 0x47;
- val = (ts_st->pid >> 8);
- if (is_start)
- val |= 0x40;
- *q++ = val;
- *q++ = ts_st->pid;
- *q++ = 0x10 | ts_st->cc;
- ts_st->cc = (ts_st->cc + 1) & 0xf;
- if (is_start) {
- /* write PES header */
- *q++ = 0x00;
- *q++ = 0x00;
- *q++ = 0x01;
- if (st->codec.codec_type == CODEC_TYPE_VIDEO)
- *q++ = 0xe0;
+ }
+
+ if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
+ (dts - get_pcr(ts, s->pb) / 300) > delay) {
+ /* pcr insert gets priority over null packet insert */
+ if (write_pcr)
+ mpegts_insert_pcr_only(s, st);
+ else
+ mpegts_insert_null_packet(s);
+ /* recalculate write_pcr and possibly retransmit si_info */
+ continue;
+ }
+
+ /* prepare packet header */
+ q = buf;
+ *q++ = 0x47;
+ val = ts_st->pid >> 8;
+ if (is_start)
+ val |= 0x40;
+ *q++ = val;
+ *q++ = ts_st->pid;
+ ts_st->cc = ts_st->cc + 1 & 0xf;
+ *q++ = 0x10 | ts_st->cc; // payload indicator + CC
+ if (key && is_start && pts != AV_NOPTS_VALUE) {
+ // set Random Access for key frames
+ if (ts_st->pid == ts_st->service->pcr_pid)
+ write_pcr = 1;
+ set_af_flag(buf, 0x40);
+ q = get_ts_payload_start(buf);
+ }
+ if (write_pcr) {
+ set_af_flag(buf, 0x10);
+ q = get_ts_payload_start(buf);
+ // add 11, pcr references the last byte of program clock reference base
+ if (ts->mux_rate > 1)
+ pcr = get_pcr(ts, s->pb);
+ else
+ pcr = (dts - delay) * 300;
+ if (dts != AV_NOPTS_VALUE && dts < pcr / 300)
+ av_log(s, AV_LOG_WARNING, "dts < pcr, TS is invalid\n");
+ extend_af(buf, write_pcr_bits(q, pcr));
+ q = get_ts_payload_start(buf);
+ }
+ if (is_start) {
+ int pes_extension = 0;
+ /* write PES header */
+ *q++ = 0x00;
+ *q++ = 0x00;
+ *q++ = 0x01;
+ private_code = 0;
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (st->codecpar->codec_id == AV_CODEC_ID_DIRAC)
+ *q++ = 0xfd;
else
- *q++ = 0xc0;
- *q++ = 0; /* unbounded size */
- *q++ = 0;
- *q++ = 0x80;
- write_pts = 0; /* XXX: enable it */
- if (write_pts) {
- *q++ = 0x80; /* PTS only */
- *q++ = 0x05; /* header len */
- pts = pts1;
- val = (0x02 << 4) |
- (((pts >> 30) & 0x07) << 1) | 1;
- *q++ = val;
- val = (((pts >> 15) & 0x7fff) << 1) | 1;
- *q++ = val >> 8;
- *q++ = val;
- val = (((pts) & 0x7fff) << 1) | 1;
- *q++ = val >> 8;
- *q++ = val;
- } else {
- *q++ = 0x00;
- *q++ = 0x00;
+ *q++ = 0xe0;
+ } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
+ (st->codecpar->codec_id == AV_CODEC_ID_MP2 ||
+ st->codecpar->codec_id == AV_CODEC_ID_MP3 ||
+ st->codecpar->codec_id == AV_CODEC_ID_AAC)) {
+ *q++ = 0xc0;
+ } else {
+ *q++ = 0xbd;
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
+ private_code = 0x20;
+ }
+ header_len = 0;
+ flags = 0;
+ if (pts != AV_NOPTS_VALUE) {
+ header_len += 5;
+ flags |= 0x80;
+ }
+ if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
+ header_len += 5;
+ flags |= 0x40;
+ }
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
+ st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
+ /* set PES_extension_flag */
+ pes_extension = 1;
+ flags |= 0x01;
+
+ /* One byte for PES2 extension flag +
+ * one byte for extension length +
+ * one byte for extension id */
+ header_len += 3;
+ }
+ len = payload_size + header_len + 3;
+ if (private_code != 0)
+ len++;
+ if (len > 0xffff)
+ len = 0;
+ *q++ = len >> 8;
+ *q++ = len;
+ val = 0x80;
+ /* data alignment indicator is required for subtitle data */
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
+ val |= 0x04;
+ *q++ = val;
+ *q++ = flags;
+ *q++ = header_len;
+ if (pts != AV_NOPTS_VALUE) {
+ write_pts(q, flags >> 6, pts);
+ q += 5;
+ }
+ if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
+ write_pts(q, 1, dts);
+ q += 5;
+ }
+ if (pes_extension && st->codecpar->codec_id == AV_CODEC_ID_DIRAC) {
+ flags = 0x01; /* set PES_extension_flag_2 */
+ *q++ = flags;
+ *q++ = 0x80 | 0x01; /* marker bit + extension length */
+ /* Set the stream ID extension flag bit to 0 and
+ * write the extended stream ID. */
+ *q++ = 0x00 | 0x60;
+ }
+ if (private_code != 0)
+ *q++ = private_code;
+ is_start = 0;
+ }
+ /* header size */
+ header_len = q - buf;
+ /* data len */
+ len = TS_PACKET_SIZE - header_len;
+ if (len > payload_size)
+ len = payload_size;
+ stuffing_len = TS_PACKET_SIZE - header_len - len;
+ if (stuffing_len > 0) {
+ /* add stuffing with AFC */
+ if (buf[3] & 0x20) {
+ /* stuffing already present: increase its size */
+ afc_len = buf[4] + 1;
+ memmove(buf + 4 + afc_len + stuffing_len,
+ buf + 4 + afc_len,
+ header_len - (4 + afc_len));
+ buf[4] += stuffing_len;
+ memset(buf + 4 + afc_len, 0xff, stuffing_len);
+ } else {
+ /* add stuffing */
+ memmove(buf + 4 + stuffing_len, buf + 4, header_len - 4);
+ buf[3] |= 0x20;
+ buf[4] = stuffing_len - 1;
+ if (stuffing_len >= 2) {
+ buf[5] = 0x00;
+ memset(buf + 6, 0xff, stuffing_len - 2);
}
}
- ts_st->packet_index = q - ts_st->packet;
}
- len = TS_PACKET_SIZE - ts_st->packet_index;
- if (len == 0) {
- put_buffer(&s->pb, ts_st->packet, TS_PACKET_SIZE);
- ts_st->packet_index = 0;
- } else {
- if (len > size)
- len = size;
- memcpy(ts_st->packet + ts_st->packet_index, buf, len);
- size -= len;
- buf += len;
- ts_st->packet_index += len;
+ memcpy(buf + TS_PACKET_SIZE - len, payload, len);
+ payload += len;
+ payload_size -= len;
+ mpegts_prefix_m2ts_header(s);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
+ }
+ avio_flush(s->pb);
+}
+
+static int mpegts_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
+{
+ AVStream *st = s->streams[pkt->stream_index];
+ int size = pkt->size;
+ uint8_t *buf = pkt->data;
+ uint8_t *data = NULL;
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSWriteStream *ts_st = st->priv_data;
+ const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE) * 2;
+ int64_t dts = AV_NOPTS_VALUE, pts = AV_NOPTS_VALUE;
+
+ if (ts->reemit_pat_pmt) {
+ av_log(s, AV_LOG_WARNING,
+ "resend_headers option is deprecated, use -mpegts_flags resend_headers\n");
+ ts->reemit_pat_pmt = 0;
+ ts->flags |= MPEGTS_FLAG_REEMIT_PAT_PMT;
+ }
+
+ if (ts->flags & MPEGTS_FLAG_REEMIT_PAT_PMT) {
+ ts->pat_packet_count = ts->pat_packet_period - 1;
+ ts->sdt_packet_count = ts->sdt_packet_period - 1;
+ ts->flags &= ~MPEGTS_FLAG_REEMIT_PAT_PMT;
+ }
+
+ if (pkt->pts != AV_NOPTS_VALUE)
+ pts = pkt->pts + delay;
+ if (pkt->dts != AV_NOPTS_VALUE)
+ dts = pkt->dts + delay;
+
+ if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
+ av_log(s, AV_LOG_ERROR, "first pts value must set\n");
+ return AVERROR_INVALIDDATA;
+ }
+ ts_st->first_pts_check = 0;
+
+ if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
+ const uint8_t *p = buf, *buf_end = p + size;
+ uint32_t state = -1;
+
+ if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
+ av_log(s, AV_LOG_ERROR, "H.264 bitstream malformed, "
+ "no startcode found, use -bsf h264_mp4toannexb\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ do {
+ p = avpriv_find_start_code(p, buf_end, &state);
+ av_log(s, AV_LOG_TRACE, "nal %d\n", state & 0x1f);
+ } while (p < buf_end && (state & 0x1f) != 9 &&
+ (state & 0x1f) != 5 && (state & 0x1f) != 1);
+
+ if ((state & 0x1f) != 9) { // AUD NAL
+ data = av_malloc(pkt->size + 6);
+ if (!data)
+ return AVERROR(ENOMEM);
+ memcpy(data + 6, pkt->data, pkt->size);
+ AV_WB32(data, 0x00000001);
+ data[4] = 0x09;
+ data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
+ buf = data;
+ size = pkt->size + 6;
+ }
+ } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) {
+ if (pkt->size < 2) {
+ av_log(s, AV_LOG_ERROR, "AAC packet too short\n");
+ return AVERROR_INVALIDDATA;
+ }
+ if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) {
+ int ret;
+ AVPacket pkt2;
+
+ if (!ts_st->amux) {
+ av_log(s, AV_LOG_ERROR, "AAC bitstream not in ADTS format "
+ "and extradata missing\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ av_init_packet(&pkt2);
+ pkt2.data = pkt->data;
+ pkt2.size = pkt->size;
+
+ ret = avio_open_dyn_buf(&ts_st->amux->pb);
+ if (ret < 0)
+ return AVERROR(ENOMEM);
+
+ ret = av_write_frame(ts_st->amux, &pkt2);
+ if (ret < 0) {
+ ffio_free_dyn_buf(&ts_st->amux->pb);
+ return ret;
+ }
+ size = avio_close_dyn_buf(ts_st->amux->pb, &data);
+ ts_st->amux->pb = NULL;
+ buf = data;
}
}
- put_flush_packet(&s->pb);
+
+ if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
+ // for video and subtitle, write a single pes packet
+ mpegts_write_pes(s, st, buf, size, pts, dts,
+ pkt->flags & AV_PKT_FLAG_KEY);
+ av_free(data);
+ return 0;
+ }
+
+ if (ts_st->payload_size + size > ts->pes_payload_size ||
+ (dts != AV_NOPTS_VALUE && ts_st->payload_dts != AV_NOPTS_VALUE &&
+ av_compare_ts(dts - ts_st->payload_dts, st->time_base,
+ s->max_delay, AV_TIME_BASE_Q) >= 0)) {
+ if (ts_st->payload_size) {
+ mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
+ ts_st->payload_pts, ts_st->payload_dts,
+ ts_st->payload_flags & AV_PKT_FLAG_KEY);
+ ts_st->payload_size = 0;
+ }
+ if (size > ts->pes_payload_size) {
+ mpegts_write_pes(s, st, buf, size, pts, dts,
+ pkt->flags & AV_PKT_FLAG_KEY);
+ av_free(data);
+ return 0;
+ }
+ }
+
+ if (!ts_st->payload_size) {
+ ts_st->payload_pts = pts;
+ ts_st->payload_dts = dts;
+ ts_st->payload_flags = pkt->flags;
+ }
+
+ memcpy(ts_st->payload + ts_st->payload_size, buf, size);
+ ts_st->payload_size += size;
+
+ av_free(data);
+
return 0;
}
+static void mpegts_write_flush(AVFormatContext *s)
+{
+ int i;
+
+ /* flush current packets */
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ MpegTSWriteStream *ts_st = st->priv_data;
+ if (ts_st->payload_size > 0) {
+ mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_size,
+ ts_st->payload_pts, ts_st->payload_dts,
+ ts_st->payload_flags & AV_PKT_FLAG_KEY);
+ ts_st->payload_size = 0;
+ }
+ }
+ avio_flush(s->pb);
+}
+
+static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ if (!pkt) {
+ mpegts_write_flush(s);
+ return 1;
+ } else {
+ return mpegts_write_packet_internal(s, pkt);
+ }
+}
+
static int mpegts_write_end(AVFormatContext *s)
{
MpegTSWrite *ts = s->priv_data;
- MpegTSWriteStream *ts_st;
MpegTSService *service;
- AVStream *st;
int i;
- /* flush current packets */
- for(i = 0; i < s->nb_streams; i++) {
- st = s->streams[i];
- ts_st = st->priv_data;
- if (ts_st->packet_index != 0) {
- /* put a known value at the end */
- memset(ts_st->packet + ts_st->packet_index, 0xff,
- TS_PACKET_SIZE - ts_st->packet_index);
- put_buffer(&s->pb, ts_st->packet, TS_PACKET_SIZE);
+ if (s->pb)
+ mpegts_write_flush(s);
+
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ MpegTSWriteStream *ts_st = st->priv_data;
+ av_freep(&ts_st->payload);
+ if (ts_st->amux) {
+ avformat_free_context(ts_st->amux);
+ ts_st->amux = NULL;
}
}
- put_flush_packet(&s->pb);
-
- for(i = 0; i < ts->nb_services; i++) {
+
+ for (i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
av_freep(&service->provider_name);
av_freep(&service->name);
}
av_free(ts->services);
- for(i = 0; i < s->nb_streams; i++) {
- st = s->streams[i];
- av_free(st->priv_data);
- }
return 0;
}
-AVOutputFormat mpegts_mux = {
- "mpegts",
- "MPEG2 transport stream format",
- "video/x-mpegts",
- "ts",
- sizeof(MpegTSWrite),
- CODEC_ID_MP2,
- CODEC_ID_MPEG1VIDEO,
- mpegts_write_header,
- mpegts_write_packet,
- mpegts_write_end,
+static const AVOption options[] = {
+ { "mpegts_transport_stream_id", "Set transport_stream_id field.",
+ offsetof(MpegTSWrite, transport_stream_id), AV_OPT_TYPE_INT,
+ { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+ { "mpegts_original_network_id", "Set original_network_id field.",
+ offsetof(MpegTSWrite, original_network_id), AV_OPT_TYPE_INT,
+ { .i64 = DVB_PRIVATE_NETWORK_START }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+ { "mpegts_service_id", "Set service_id field.",
+ offsetof(MpegTSWrite, service_id), AV_OPT_TYPE_INT,
+ { .i64 = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM },
+ { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
+ offsetof(MpegTSWrite, pmt_start_pid), AV_OPT_TYPE_INT,
+ { .i64 = 0x1000 }, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM },
+ { "mpegts_start_pid", "Set the first pid.",
+ offsetof(MpegTSWrite, start_pid), AV_OPT_TYPE_INT,
+ { .i64 = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM },
+ {"mpegts_m2ts_mode", "Enable m2ts mode.",
+ offsetof(MpegTSWrite, m2ts_mode), AV_OPT_TYPE_INT,
+ { .i64 = -1 }, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
+ { "muxrate", NULL,
+ offsetof(MpegTSWrite, mux_rate), AV_OPT_TYPE_INT,
+ { .i64 = 1 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "pes_payload_size", "Minimum PES packet payload in bytes",
+ offsetof(MpegTSWrite, pes_payload_size), AV_OPT_TYPE_INT,
+ { .i64 = DEFAULT_PES_PAYLOAD_SIZE }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "mpegts_flags", "MPEG-TS muxing flags",
+ offsetof(MpegTSWrite, flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, 0, INT_MAX,
+ AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+ { "resend_headers", "Reemit PAT/PMT before writing the next packet",
+ 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_REEMIT_PAT_PMT }, 0, INT_MAX,
+ AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+ { "latm", "Use LATM packetization for AAC",
+ 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_AAC_LATM }, 0, INT_MAX,
+ AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+ { "system_b", "Conform to System B (DVB) instead of System A (ATSC)",
+ 0, AV_OPT_TYPE_CONST, { .i64 = MPEGTS_FLAG_SYSTEM_B }, 0, INT_MAX,
+ AV_OPT_FLAG_ENCODING_PARAM, "mpegts_flags" },
+ // backward compatibility
+ { "resend_headers", "Reemit PAT/PMT before writing the next packet",
+ offsetof(MpegTSWrite, reemit_pat_pmt), AV_OPT_TYPE_INT,
+ { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { "pcr_period", "PCR retransmission time",
+ offsetof(MpegTSWrite, pcr_period), AV_OPT_TYPE_INT,
+ { .i64 = PCR_RETRANS_TIME }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL },
+};
+
+static const AVClass mpegts_muxer_class = {
+ .class_name = "MPEGTS muxer",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVOutputFormat ff_mpegts_muxer = {
+ .name = "mpegts",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-TS (MPEG-2 Transport Stream)"),
+ .mime_type = "video/MP2T",
+ .extensions = "ts,m2t,m2ts,mts",
+ .priv_data_size = sizeof(MpegTSWrite),
+ .audio_codec = AV_CODEC_ID_MP2,
+ .video_codec = AV_CODEC_ID_MPEG2VIDEO,
+ .write_header = mpegts_write_header,
+ .write_packet = mpegts_write_packet,
+ .write_trailer = mpegts_write_end,
+ .flags = AVFMT_ALLOW_FLUSH | AVFMT_VARIABLE_FPS,
+ .priv_class = &mpegts_muxer_class,
};
projects / ffmpeg / blobdiff