/*
- * 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 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/bswap.h"
+#include "libavutil/crc.h"
+#include "libavutil/dict.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavcodec/mpegvideo.h"
#include "avformat.h"
-#include "crc.h"
+#include "internal.h"
#include "mpegts.h"
+#include "adts.h"
+
+#define PCR_TIME_BASE 27000000
/* write DVB SI sections */
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 {
+ const AVClass *av_class;
+ 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
+
+ int transport_stream_id;
+ int original_network_id;
+ int service_id;
+
+ int pmt_start_pid;
+ int start_pid;
+} MpegTSWrite;
+
+static const AVOption options[] = {
+ { "mpegts_transport_stream_id", "Set transport_stream_id field.",
+ offsetof(MpegTSWrite, transport_stream_id), FF_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ { "mpegts_original_network_id", "Set original_network_id field.",
+ offsetof(MpegTSWrite, original_network_id), FF_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ { "mpegts_service_id", "Set service_id field.",
+ offsetof(MpegTSWrite, service_id), FF_OPT_TYPE_INT, {.dbl = 0x0001 }, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ { "mpegts_pmt_start_pid", "Set the first pid of the PMT.",
+ offsetof(MpegTSWrite, pmt_start_pid), FF_OPT_TYPE_INT, {.dbl = 0x1000 }, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
+ { "mpegts_start_pid", "Set the first pid.",
+ offsetof(MpegTSWrite, start_pid), FF_OPT_TYPE_INT, {.dbl = 0x0100 }, 0x0100, 0x0f00, 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,
+};
+
/* NOTE: 4 bytes must be left at the end for the crc32 */
static void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
{
unsigned char *q;
int first, b, len1, left;
- crc = bswap_32(av_crc(av_crc04C11DB7, -1, 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;
{
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 */
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;
/*********************************************/
/* 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
#define DEFAULT_PES_PAYLOAD_SIZE ((DEFAULT_PES_HEADER_FREQ - 1) * 184 + 170)
int pid; /* stream associated pid */
int cc;
int payload_index;
+ int first_pts_check; ///< first pts check needed
int64_t payload_pts;
+ int64_t payload_dts;
+ int payload_flags;
uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
+ ADTSContext *adts;
} MpegTSWriteStream;
-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_freq;
-} 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;
for(i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MpegTSWriteStream *ts_st = st->priv_data;
+ AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL,0);
switch(st->codec->codec_id) {
case CODEC_ID_MPEG1VIDEO:
case CODEC_ID_MPEG2VIDEO:
case CODEC_ID_H264:
stream_type = STREAM_TYPE_VIDEO_H264;
break;
+ 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;
case CODEC_ID_AAC:
stream_type = STREAM_TYPE_AUDIO_AAC;
break;
+ case CODEC_ID_AAC_LATM:
+ stream_type = STREAM_TYPE_AUDIO_AAC_LATM;
+ break;
case CODEC_ID_AC3:
stream_type = STREAM_TYPE_AUDIO_AC3;
break;
/* write optional descriptors here */
switch(st->codec->codec_type) {
- case CODEC_TYPE_AUDIO:
- if (strlen(st->language) == 3) {
+ case AVMEDIA_TYPE_AUDIO:
+ if (lang) {
+ char *p;
+ char *next = lang->value;
+ uint8_t *len_ptr;
+
*q++ = 0x0a; /* ISO 639 language descriptor */
- *q++ = 4;
- *q++ = st->language[0];
- *q++ = st->language[1];
- *q++ = st->language[2];
- *q++ = 0; /* undefined type */
+ len_ptr = q++;
+ *len_ptr = 0;
+
+ for (p = lang->value; next && *len_ptr < 255 / 4 * 4; p = next + 1) {
+ 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 CODEC_TYPE_SUBTITLE:
+ case AVMEDIA_TYPE_SUBTITLE:
{
const char *language;
- language = st->language;
- if (strlen(language) != 3)
- language = "eng";
+ 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) */
- put16(&q, 1); /* page id */
- put16(&q, 1); /* ancillary page id */
+ 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;
}
service = av_mallocz(sizeof(MpegTSService));
if (!service)
return NULL;
- service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
+ service->pmt.pid = ts->pmt_start_pid + ts->nb_services;
service->sid = sid;
service->provider_name = av_strdup(provider_name);
service->name = av_strdup(name);
static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
{
AVFormatContext *ctx = s->opaque;
- put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
+ 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;
- 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_name = s->title;
- if (service_name[0] == '\0')
- service_name = DEFAULT_SERVICE_NAME;
- service = mpegts_add_service(ts, DEFAULT_SID,
- DEFAULT_PROVIDER_NAME, 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);
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];
+ av_set_pts_info(st, 33, 1, 90000);
ts_st = av_mallocz(sizeof(MpegTSWriteStream));
if (!ts_st)
goto fail;
st->priv_data = ts_st;
ts_st->service = service;
- ts_st->pid = DEFAULT_START_PID + i;
+ /* 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);
+ 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 == CODEC_TYPE_VIDEO &&
- service->pcr_pid == 0x1fff)
+ 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;
+ }
}
+ av_free(pids);
+
/* if no video stream, use the first stream as PCR */
if (service->pcr_pid == 0x1fff && s->nb_streams > 0) {
- ts_st = s->streams[0]->priv_data;
+ pcr_st = s->streams[0];
+ ts_st = pcr_st->priv_data;
service->pcr_pid = ts_st->pid;
}
- if (total_bit_rate <= 8 * 1024)
- total_bit_rate = 8 * 1024;
- service->pcr_packet_freq = (total_bit_rate * PCR_RETRANS_TIME) /
- (TS_PACKET_SIZE * 8 * 1000);
- 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]);
+ 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);
+
+ avio_flush(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);
+ av_freep(&st->priv_data);
}
return -1;
}
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++) {
}
}
-/* NOTE: pes_data contains all the PES packet */
+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 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));
+ 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)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSWriteStream *ts_st = st->priv_data;
+ uint8_t *q;
+ 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));
+ 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 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 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;
+ 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) {
write_pcr = 0;
if (ts_st->pid == ts_st->service->pcr_pid) {
- ts_st->service->pcr_packet_count++;
+ 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_freq) {
+ ts_st->service->pcr_packet_period) {
ts_st->service->pcr_packet_count = 0;
write_pcr = 1;
- /* XXX: this is incorrect, but at least we have a PCR
- value */
- pcr = pts;
}
}
+ 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 |= 0x40;
*q++ = val;
*q++ = ts_st->pid;
- *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
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) {
- *q++ = 7; /* AFC length */
- *q++ = 0x10; /* flags: PCR present */
- *q++ = pcr >> 25;
- *q++ = pcr >> 17;
- *q++ = pcr >> 9;
- *q++ = pcr >> 1;
- *q++ = (pcr & 1) << 7;
- *q++ = 0;
+ 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->codec->codec_type == CODEC_TYPE_VIDEO) {
- *q++ = 0xe0;
- } else if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
+ if (st->codec->codec_id == CODEC_ID_DIRAC) {
+ *q++ = 0xfd;
+ } else
+ *q++ = 0xe0;
+ } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO &&
(st->codec->codec_id == CODEC_ID_MP2 ||
- st->codec->codec_id == CODEC_ID_MP3)) {
+ st->codec->codec_id == CODEC_ID_MP3 ||
+ st->codec->codec_id == CODEC_ID_AAC)) {
*q++ = 0xc0;
} else {
*q++ = 0xbd;
- if (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
+ if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
private_code = 0x20;
}
}
- if (pts != AV_NOPTS_VALUE)
- header_len = 8;
- else
- header_len = 3;
+ 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)
- header_len++;
- len = payload_size + header_len;
+ 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 == CODEC_TYPE_SUBTITLE)
+ if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE)
val |= 0x04;
*q++ = val;
+ *q++ = flags;
+ *q++ = header_len;
if (pts != AV_NOPTS_VALUE) {
- *q++ = 0x80; /* PTS only */
- *q++ = 0x05; /* header len */
- 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;
+ 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;
memcpy(buf + TS_PACKET_SIZE - len, payload, len);
payload += len;
payload_size -= len;
- put_buffer(&s->pb, buf, TS_PACKET_SIZE);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
}
- put_flush_packet(&s->pb);
+ avio_flush(s->pb);
}
static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVStream *st = s->streams[pkt->stream_index];
- int size= pkt->size;
+ int size = pkt->size;
uint8_t *buf= pkt->data;
+ uint8_t *data= NULL;
MpegTSWriteStream *ts_st = st->priv_data;
- int len, max_payload_size;
+ 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 (st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
- /* for subtitle, a single PES packet must be generated */
- mpegts_write_pes(s, st, buf, size, pkt->pts);
- return 0;
+ 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;
- max_payload_size = DEFAULT_PES_PAYLOAD_SIZE;
- while (size > 0) {
- len = max_payload_size - ts_st->payload_index;
- if (len > size)
- len = size;
- memcpy(ts_st->payload + ts_st->payload_index, buf, len);
- buf += len;
- size -= len;
- ts_st->payload_index += len;
- if (ts_st->payload_pts == AV_NOPTS_VALUE)
- ts_st->payload_pts = pkt->pts;
- if (ts_st->payload_index >= max_payload_size) {
- mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
- ts_st->payload_pts);
- ts_st->payload_pts = AV_NOPTS_VALUE;
- ts_st->payload_index = 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, pkt->flags & AV_PKT_FLAG_KEY);
+ 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_flags & AV_PKT_FLAG_KEY);
+ ts_st->payload_index = 0;
+ }
+
+ if (!ts_st->payload_index) {
+ ts_st->payload_pts = pts;
+ ts_st->payload_dts = dts;
+ ts_st->payload_flags = pkt->flags;
+ }
+
+ memcpy(ts_st->payload + ts_st->payload_index, buf, size);
+ ts_st->payload_index += size;
+
+ av_free(data);
+
return 0;
}
ts_st = st->priv_data;
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_pts, ts_st->payload_dts,
+ ts_st->payload_flags & AV_PKT_FLAG_KEY);
}
+ av_freep(&ts_st->adts);
}
- put_flush_packet(&s->pb);
+ avio_flush(s->pb);
for(i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
return 0;
}
-AVOutputFormat mpegts_muxer = {
- "mpegts",
- "MPEG2 transport stream format",
- "video/x-mpegts",
- "ts",
- sizeof(MpegTSWrite),
- CODEC_ID_MP2,
- CODEC_ID_MPEG2VIDEO,
- mpegts_write_header,
- mpegts_write_packet,
- mpegts_write_end,
+AVOutputFormat ff_mpegts_muxer = {
+ .name = "mpegts",
+ .long_name = NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
+ .mime_type = "video/x-mpegts",
+ .extensions = "ts,m2t",
+ .priv_data_size = sizeof(MpegTSWrite),
+ .audio_codec = CODEC_ID_MP2,
+ .video_codec = CODEC_ID_MPEG2VIDEO,
+ .write_header = mpegts_write_header,
+ .write_packet = mpegts_write_packet,
+ .write_trailer = mpegts_write_end,
+ .priv_class = &mpegts_muxer_class,
};
projects / ffmpeg / blobdiff