* MPEG2 transport stream (aka DVB) muxer
* Copyright (c) 2003 Fabrice Bellard
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg 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 FFmpeg; 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/opt.h"
#include "libavcodec/mpegvideo.h"
#include "avformat.h"
+#include "internal.h"
#include "mpegts.h"
#include "adts.h"
+#define PCR_TIME_BASE 27000000
+
/* write DVB SI sections */
/*********************************************/
} MpegTSService;
typedef struct MpegTSWrite {
+ const AVClass *av_class;
MpegTSSection pat; /* MPEG2 pat table */
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
int nb_services;
int onid;
int tsid;
- uint64_t cur_pcr;
+ 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)
{
- 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 = bswap_32(av_crc(av_crc_get_table(AV_CRC_32_IEEE), -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;
buf_ptr += len1;
len -= len1;
-
- ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
}
}
{
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)
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 (lang && strlen(lang->value) == 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++ = lang->value[0];
- *q++ = lang->value[1];
- *q++ = lang->value[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 = lang && strlen(lang->value)==3 ? lang->value : "eng";
*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 CODEC_TYPE_VIDEO:
+ case AVMEDIA_TYPE_VIDEO:
if (stream_type == STREAM_TYPE_VIDEO_DIRAC) {
*q++ = 0x05; /*MPEG-2 registration descriptor*/
*q++ = 4;
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)
MpegTSWriteStream *ts_st;
MpegTSService *service;
AVStream *st, *pcr_st = NULL;
- AVMetadataTag *title;
- int i;
+ AVMetadataTag *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 */
- title = av_metadata_get(s->metadata, "title", NULL, 0);
+ title = av_metadata_get(s->metadata, "service_name", NULL, 0);
+ if (!title)
+ 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);
+ provider = av_metadata_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->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 */
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 &&
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
service->pcr_pid == 0x1fff) {
service->pcr_pid = ts_st->pid;
pcr_st = st;
st->codec->extradata_size > 0) {
ts_st->adts = av_mallocz(sizeof(*ts_st->adts));
if (!ts_st->adts)
- return AVERROR_NOMEM;
+ 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) {
pcr_st = s->streams[0];
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->cur_pcr = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
+ 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 == CODEC_TYPE_AUDIO) {
+ 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 =
ts->pat_packet_count = ts->pat_packet_period-1;
ts->sdt_packet_count = ts->sdt_packet_period-1;
- av_log(s, AV_LOG_INFO,
- "muxrate %d bps, pcr every %d pkts, "
+ 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",
- ts->mux_rate, service->pcr_packet_period,
+ service->pcr_packet_period,
ts->sdt_packet_period, ts->pat_packet_period);
-
- put_flush_packet(s->pb);
+ 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;
}
}
}
+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 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 << 7 | pcr_low >> 8 | 0x7e;
+ *buf++ = pcr_low;
+
+ return buf;
+}
+
/* Write a single null transport stream packet */
static void mpegts_insert_null_packet(AVFormatContext *s)
{
- MpegTSWrite *ts = s->priv_data;
uint8_t *q;
uint8_t buf[TS_PACKET_SIZE];
*q++ = 0xff;
*q++ = 0x10;
memset(q, 0x0FF, TS_PACKET_SIZE - (q - buf));
- put_buffer(s->pb, buf, TS_PACKET_SIZE);
- ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
}
/* Write a single transport stream packet with a PCR and no payload */
MpegTSWrite *ts = s->priv_data;
MpegTSWriteStream *ts_st = st->priv_data;
uint8_t *q;
- uint64_t pcr = ts->cur_pcr;
uint8_t buf[TS_PACKET_SIZE];
q = buf;
*q++ = 0x10; /* Adaptation flags: PCR present */
/* PCR coded into 6 bytes */
- *q++ = pcr >> 25;
- *q++ = pcr >> 17;
- *q++ = pcr >> 9;
- *q++ = pcr >> 1;
- *q++ = (pcr & 1) << 7;
- *q++ = 0;
+ 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);
- ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
}
static void write_pts(uint8_t *q, int fourbits, int64_t pts)
}
if (ts->mux_rate > 1 && dts != AV_NOPTS_VALUE &&
- (dts - (int64_t)ts->cur_pcr) > delay) {
+ (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);
if (write_pcr) {
// add 11, pcr references the last byte of program clock reference base
if (ts->mux_rate > 1)
- pcr = ts->cur_pcr + (4+7)*8*90000LL / ts->mux_rate;
+ pcr = get_pcr(ts, s->pb);
else
- pcr = dts - delay;
- if (dts != AV_NOPTS_VALUE && dts < pcr)
+ 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++ = pcr >> 25;
- *q++ = pcr >> 17;
- *q++ = pcr >> 9;
- *q++ = pcr >> 1;
- *q++ = (pcr & 1) << 7;
- *q++ = 0;
+ q = write_pcr_bits(q, pcr);
}
if (is_start) {
int pes_extension = 0;
*q++ = 0x00;
*q++ = 0x01;
private_code = 0;
- if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
+ 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 == CODEC_TYPE_AUDIO &&
+ } 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;
}
}
header_len += 5;
flags |= 0x40;
}
- if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
+ if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
st->codec->codec_id == CODEC_ID_DIRAC) {
/* set PES_extension_flag */
pes_extension = 1;
*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;
memcpy(buf + TS_PACKET_SIZE - len, payload, len);
payload += len;
payload_size -= len;
- put_buffer(s->pb, buf, TS_PACKET_SIZE);
- ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
+ 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)
memcpy(data+6, pkt->data, pkt->size);
AV_WB32(data, 0x00000001);
data[4] = 0x09;
- data[5] = 0xe0; // any slice type
+ data[5] = 0xf0; // any slice type (0xe) + rbsp stop one bit
buf = data;
size = pkt->size+6;
}
return -1;
data = av_malloc(new_size);
if (!data)
- return AVERROR_NOMEM;
+ 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);
}
}
- if (st->codec->codec_type != CODEC_TYPE_AUDIO) {
+ 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);
memcpy(ts_st->payload + ts_st->payload_index, buf, size);
ts_st->payload_index += size;
+ av_free(data);
+
return 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);
+ avio_flush(s->pb);
for(i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
return 0;
}
-AVOutputFormat mpegts_muxer = {
+AVOutputFormat ff_mpegts_muxer = {
"mpegts",
NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
"video/x-mpegts",
mpegts_write_header,
mpegts_write_packet,
mpegts_write_end,
+ .priv_class = &mpegts_muxer_class,
};
projects / ffmpeg / blobdiff