X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fmpegtsenc.c;h=bfd21db139eeebfeccbff204d3792b982e53ebc7;hb=7d87d56ff810b921537138f91048a932065260a1;hp=60520de5406faa4887caf0863209a788fdc2be03;hpb=ce34182dd75c8cfdde134944f6de83e17c73ff9d;p=ffmpeg diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c index 60520de5406..bfd21db139e 100644 --- a/libavformat/mpegtsenc.c +++ b/libavformat/mpegtsenc.c @@ -1,83 +1,35 @@ /* - * MPEG2 transport stream (aka DVB) mux - * Copyright (c) 2003 Fabrice Bellard. + * MPEG2 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 FFmpeg. + * + * FFmpeg 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, + * FFmpeg 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 FFmpeg; 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 "libavcodec/mpegvideo.h" +#include "avformat.h" +#include "internal.h" #include "mpegts.h" +#include "adts.h" -/* write DVB SI sections */ - -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 -}; +#define PCR_TIME_BASE 27000000 -unsigned int mpegts_crc32(const uint8_t *data, int len) -{ - register int i; - unsigned int crc = 0xffffffff; - - for (i=0; i> 24) ^ *data++) & 0xff]; - - return crc; -} +/* write DVB SI sections */ /*********************************************/ /* mpegts section writer */ @@ -89,21 +41,47 @@ typedef struct MpegTSSection { void *opaque; } MpegTSSection; +typedef struct MpegTSService { + MpegTSSection pmt; /* MPEG2 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 { + MpegTSSection pat; /* MPEG2 pat table */ + MpegTSSection sdt; /* MPEG2 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 +} MpegTSWrite; + /* 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) { + MpegTSWrite *ts = ((AVFormatContext*)s->opaque)->priv_data; unsigned int crc; unsigned char packet[TS_PACKET_SIZE]; const unsigned char *buf_ptr; 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; - + /* send each packet */ buf_ptr = buf; while (len > 0) { @@ -120,7 +98,7 @@ void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len) 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; @@ -145,13 +123,13 @@ static inline void put16(uint8_t **q_ptr, int val) *q_ptr = q; } -int mpegts_write_section1(MpegTSSection *s, int tid, int id, +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; - + tot_len = 3 + 5 + len + 4; /* check if not too big */ if (tot_len > 1024) @@ -165,7 +143,7 @@ int mpegts_write_section1(MpegTSSection *s, int tid, int id, *q++ = sec_num; *q++ = last_sec_num; memcpy(q, buf, len); - + mpegts_write_section(s, section, tot_len); return 0; } @@ -185,47 +163,32 @@ int mpegts_write_section1(MpegTSSection *s, int tid, int id, /* 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) /* 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_index; + int first_pts_check; ///< first pts check needed + int64_t payload_pts; + int64_t payload_dts; + uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE]; + ADTSContext *adts; } 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; int i; - + q = data; for(i = 0; i < ts->nb_services; i++) { service = ts->services[i]; @@ -253,17 +216,35 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service) 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++) { 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_MPEG2; //XXX/FIXME is this (and the define) correct? + AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL,0); + switch(st->codec->codec_id) { + case CODEC_ID_MPEG1VIDEO: + case CODEC_ID_MPEG2VIDEO: + stream_type = STREAM_TYPE_VIDEO_MPEG2; + break; + case CODEC_ID_MPEG4: + stream_type = STREAM_TYPE_VIDEO_MPEG4; + break; + case CODEC_ID_H264: + stream_type = STREAM_TYPE_VIDEO_H264; break; - case CODEC_TYPE_AUDIO: + case CODEC_ID_DIRAC: + stream_type = STREAM_TYPE_VIDEO_DIRAC; + break; + case CODEC_ID_MP2: + case CODEC_ID_MP3: stream_type = STREAM_TYPE_AUDIO_MPEG1; break; + case CODEC_ID_AAC: + stream_type = STREAM_TYPE_AUDIO_AAC; + break; + case CODEC_ID_AC3: + stream_type = STREAM_TYPE_AUDIO_AC3; + break; default: stream_type = STREAM_TYPE_PRIVATE_DATA; break; @@ -274,6 +255,47 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service) q += 2; /* patched after */ /* write optional descriptors here */ + switch(st->codec->codec_type) { + case AVMEDIA_TYPE_AUDIO: + if (lang && strlen(lang->value) == 3) { + *q++ = 0x0a; /* ISO 639 language descriptor */ + *q++ = 4; + *q++ = lang->value[0]; + *q++ = lang->value[1]; + *q++ = lang->value[2]; + *q++ = 0; /* undefined type */ + } + 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(st->codec->extradata_size == 4) { + memcpy(q, st->codec->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; @@ -281,7 +303,7 @@ static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service) } 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) @@ -306,7 +328,7 @@ static void mpegts_write_sdt(AVFormatContext *s) MpegTSService *service; uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr; int i, running_status, free_ca_mode, val; - + q = data; put16(&q, ts->onid); *q++ = 0xff; @@ -329,7 +351,7 @@ static void mpegts_write_sdt(AVFormatContext *s) desc_len_ptr[0] = q - desc_len_ptr - 1; /* fill descriptor length */ - val = (running_status << 13) | (free_ca_mode << 12) | + 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; @@ -338,9 +360,9 @@ static void mpegts_write_sdt(AVFormatContext *s) 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; @@ -360,7 +382,7 @@ static MpegTSService *mpegts_add_service(MpegTSWrite *ts, static void section_write_packet(MpegTSSection *s, const uint8_t *packet) { AVFormatContext *ctx = s->opaque; - put_buffer(&ctx->pb, packet, TS_PACKET_SIZE); + put_buffer(ctx->pb, packet, TS_PACKET_SIZE); } static int mpegts_write_header(AVFormatContext *s) @@ -368,65 +390,146 @@ 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; + AVMetadataTag *title; + int i, j; + const char *service_name; + int *pids; ts->tsid = DEFAULT_TSID; ts->onid = DEFAULT_ONID; /* allocate a single DVB service */ - service = mpegts_add_service(ts, DEFAULT_SID, - DEFAULT_PROVIDER_NAME, DEFAULT_SERVICE_NAME); + title = av_metadata_get(s->metadata, "title", NULL, 0); + service_name = title ? title->value : DEFAULT_SERVICE_NAME; + service = mpegts_add_service(ts, DEFAULT_SID, + DEFAULT_PROVIDER_NAME, service_name); service->pmt.write_packet = section_write_packet; service->pmt.opaque = s; + service->pmt.cc = 15; ts->pat.pid = PAT_PID; - ts->pat.cc = 0; + ts->pat.cc = 15; // Initialize at 15 so that it wraps and be equal to 0 for the first packet we write ts->pat.write_packet = section_write_packet; ts->pat.opaque = s; ts->sdt.pid = SDT_PID; - ts->sdt.cc = 0; + ts->sdt.cc = 15; ts->sdt.write_packet = section_write_packet; ts->sdt.opaque = s; + pids = av_malloc(s->nb_streams * sizeof(*pids)); + if (!pids) + return AVERROR(ENOMEM); + /* assign pids to each stream */ - total_bit_rate = 0; for(i = 0;i < s->nb_streams; i++) { st = s->streams[i]; ts_st = av_mallocz(sizeof(MpegTSWriteStream)); if (!ts_st) 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->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 = DEFAULT_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); + goto fail; + } + if (ts_st->pid == service->pmt.pid) { + av_log(s, AV_LOG_ERROR, "Duplicate stream id %d\n", ts_st->pid); + 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); + 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->codec->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->codec->codec_id == CODEC_ID_AAC && + st->codec->extradata_size > 0) { + ts_st->adts = av_mallocz(sizeof(*ts_st->adts)); + if (!ts_st->adts) + return AVERROR(ENOMEM); + if (ff_adts_decode_extradata(s, ts_st->adts, st->codec->extradata, + st->codec->extradata_size) < 0) + return -1; + } } - 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; + } + + ts->mux_rate = s->mux_rate ? s->mux_rate : 1; + + if (ts->mux_rate > 1) { + service->pcr_packet_period = (ts->mux_rate * PCR_RETRANS_TIME) / + (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->codec->codec_type == AVMEDIA_TYPE_AUDIO) { + if (!pcr_st->codec->frame_size) { + av_log(s, AV_LOG_WARNING, "frame size not set\n"); + service->pcr_packet_period = + pcr_st->codec->sample_rate/(10*512); + } else { + service->pcr_packet_period = + pcr_st->codec->sample_rate/(10*pcr_st->codec->frame_size); + } + } else { + // max delta PCR 0.1s + service->pcr_packet_period = + pcr_st->codec->time_base.den/(10*pcr_st->codec->time_base.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_INFO, "muxrate VBR, "); + else + av_log(s, AV_LOG_INFO, "muxrate %d, ", ts->mux_rate); + av_log(s, AV_LOG_INFO, "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); + + put_flush_packet(s->pb); return 0; fail: + av_free(pids); for(i = 0;i < s->nb_streams; i++) { st = s->streams[i]; av_free(st->priv_data); @@ -440,11 +543,11 @@ 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++) { @@ -453,82 +556,362 @@ static void retransmit_si_info(AVFormatContext *s) } } -static int mpegts_write_packet(AVFormatContext *s, int stream_index, - uint8_t *buf, int size, int pts1) +static int64_t get_pcr(const MpegTSWrite *ts, ByteIOContext *pb) +{ + return av_rescale(url_ftell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) + + ts->first_pcr; +} + +static uint8_t* 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 & 1) << 7) | (pcr_low >> 8); + *buf++ = pcr_low; + + return buf; +} + +/* Write a single null transport stream packet */ +static void mpegts_insert_null_packet(AVFormatContext *s) { - AVStream *st = s->streams[stream_index]; + MpegTSWrite *ts = s->priv_data; + 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)); + put_buffer(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) +{ + 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]; + + 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 */ + + /* 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)); + put_buffer(s->pb, buf, TS_PACKET_SIZE); +} - while (size > 0) { - if (ts_st->packet_index == 0) { - retransmit_si_info(s); +static void write_pts(uint8_t *q, int fourbits, int64_t pts) +{ + int val; - /* 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; + 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; +} + +/* Add a pes header to the front of payload, and segment into an integer number of + * ts packets. The final ts packet is padded using an over-sized 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) +{ + 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) + } + + 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); + continue; /* recalculate write_pcr and possibly retransmit si_info */ + } + + /* 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 | (write_pcr ? 0x20 : 0); + if (write_pcr) { + // 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"); + *q++ = 7; /* AFC length */ + *q++ = 0x10; /* flags: PCR present */ + q = write_pcr_bits(q, pcr); + } + if (is_start) { + int pes_extension = 0; + /* write PES header */ + *q++ = 0x00; + *q++ = 0x00; + *q++ = 0x01; + private_code = 0; + if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { + if (st->codec->codec_id == CODEC_ID_DIRAC) { + *q++ = 0xfd; + } else *q++ = 0xe0; - 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; + } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && + (st->codec->codec_id == CODEC_ID_MP2 || + st->codec->codec_id == CODEC_ID_MP3)) { + *q++ = 0xc0; + } else { + *q++ = 0xbd; + if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { + private_code = 0x20; } } - ts_st->packet_index = q - ts_st->packet; + 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->codec->codec_type == AVMEDIA_TYPE_VIDEO && + st->codec->codec_id == 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->codec->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->codec->codec_id == 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; } - 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; + /* 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); + } + } + } + memcpy(buf + TS_PACKET_SIZE - len, payload, len); + payload += len; + payload_size -= len; + put_buffer(s->pb, buf, TS_PACKET_SIZE); + } + put_flush_packet(s->pb); +} + +static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + AVStream *st = s->streams[pkt->stream_index]; + int size = pkt->size; + uint8_t *buf= pkt->data; + uint8_t *data= NULL; + 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 (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 -1; + } + ts_st->first_pts_check = 0; + + if (st->codec->codec_id == 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, "h264 bitstream malformated, " + "no startcode found, use -vbsf h264_mp4toannexb\n"); + return -1; + } + + do { + p = ff_find_start_code(p, buf_end, &state); + //av_log(s, AV_LOG_INFO, "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 -1; + 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->codec->codec_id == CODEC_ID_AAC) { + if (pkt->size < 2) + return -1; + if ((AV_RB16(pkt->data) & 0xfff0) != 0xfff0) { + ADTSContext *adts = ts_st->adts; + int new_size; + if (!adts) { + av_log(s, AV_LOG_ERROR, "aac bitstream not in adts format " + "and extradata missing\n"); + return -1; + } + new_size = ADTS_HEADER_SIZE+adts->pce_size+pkt->size; + if ((unsigned)new_size >= INT_MAX) + return -1; + data = av_malloc(new_size); + if (!data) + return AVERROR(ENOMEM); + ff_adts_write_frame_header(adts, data, pkt->size, adts->pce_size); + if (adts->pce_size) { + memcpy(data+ADTS_HEADER_SIZE, adts->pce_data, adts->pce_size); + adts->pce_size = 0; + } + memcpy(data+ADTS_HEADER_SIZE+adts->pce_size, pkt->data, pkt->size); + buf = data; + size = new_size; + } + } + + if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) { + // for video and subtitle, write a single pes packet + mpegts_write_pes(s, st, buf, size, pts, dts); + av_free(data); + return 0; + } + + if (ts_st->payload_index + size > DEFAULT_PES_PAYLOAD_SIZE) { + mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index, + ts_st->payload_pts, ts_st->payload_dts); + ts_st->payload_index = 0; } - put_flush_packet(&s->pb); + + if (!ts_st->payload_index) { + ts_st->payload_pts = pts; + ts_st->payload_dts = dts; + } + + memcpy(ts_st->payload + ts_st->payload_index, buf, size); + ts_st->payload_index += size; + + av_free(data); + return 0; } @@ -544,15 +927,14 @@ static int mpegts_write_end(AVFormatContext *s) 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 (ts_st->payload_index > 0) { + mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index, + ts_st->payload_pts, ts_st->payload_dts); } + av_freep(&ts_st->adts); } - put_flush_packet(&s->pb); - + put_flush_packet(s->pb); + for(i = 0; i < ts->nb_services; i++) { service = ts->services[i]; av_freep(&service->provider_name); @@ -561,21 +943,17 @@ static int mpegts_write_end(AVFormatContext *s) } 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 = { +AVOutputFormat mpegts_muxer = { "mpegts", - "MPEG2 transport stream format", + NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"), "video/x-mpegts", - "ts", + "ts,m2t", sizeof(MpegTSWrite), CODEC_ID_MP2, - CODEC_ID_MPEG1VIDEO, + CODEC_ID_MPEG2VIDEO, mpegts_write_header, mpegts_write_packet, mpegts_write_end,