* 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/dict.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
#include "libavcodec/mpegvideo.h"
#include "avformat.h"
#include "internal.h"
} MpegTSService;
typedef struct MpegTSWrite {
+ const AVClass *av_class;
MpegTSSection pat; /* MPEG2 pat table */
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
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)
{
- MpegTSWrite *ts = ((AVFormatContext*)s->opaque)->priv_data;
unsigned int crc;
unsigned char packet[TS_PACKET_SIZE];
const unsigned char *buf_ptr;
{
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 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;
for(i = 0; i < s->nb_streams; i++) {
AVStream *st = s->streams[i];
MpegTSWriteStream *ts_st = st->priv_data;
- AVMetadataTag *lang = av_metadata_get(st->metadata, "language", NULL,0);
+ 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_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 AVMEDIA_TYPE_AUDIO:
- if (lang && strlen(lang->value) == 3) {
+ 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 AVMEDIA_TYPE_SUBTITLE:
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, *provider;
+ 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 */
- title = av_metadata_get(s->metadata, "service_name", NULL, 0);
+ title = av_dict_get(s->metadata, "service_name", NULL, 0);
if (!title)
- title = av_metadata_get(s->metadata, "title", NULL, 0);
+ title = av_dict_get(s->metadata, "title", NULL, 0);
service_name = title ? title->value : DEFAULT_SERVICE_NAME;
- provider = av_metadata_get(s->metadata, "service_provider", NULL, 0);
+ provider = av_dict_get(s->metadata, "service_provider", NULL, 0);
provider_name = provider ? provider->value : DEFAULT_PROVIDER_NAME;
- service = mpegts_add_service(ts, DEFAULT_SID, provider_name, service_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;
/* 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;
/* 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;
+ ts_st->pid = ts->start_pid + i;
} else if (st->id < 0x1FFF) {
ts_st->pid = st->id;
} else {
service->pcr_packet_period,
ts->sdt_packet_period, ts->pat_packet_period);
- put_flush_packet(s->pb);
+ avio_flush(s->pb);
return 0;
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, ByteIOContext *pb)
+static int64_t get_pcr(const MpegTSWrite *ts, AVIOContext *pb)
{
- return av_rescale(url_ftell(pb) + 11, 8 * PCR_TIME_BASE, ts->mux_rate) +
+ 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)
+static int write_pcr_bits(uint8_t *buf, int64_t pcr)
{
int64_t pcr_low = pcr % 300, pcr_high = pcr / 300;
*buf++ = pcr_high >> 17;
*buf++ = pcr_high >> 9;
*buf++ = pcr_high >> 1;
- *buf++ = ((pcr_high & 1) << 7) | (pcr_low >> 8);
+ *buf++ = pcr_high << 7 | pcr_low >> 8 | 0x7e;
*buf++ = pcr_low;
- return buf;
+ return 6;
}
/* 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);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
}
/* Write a single transport stream packet with a PCR and no payload */
*q++ = 0x10; /* Adaptation flags: PCR present */
/* PCR coded into 6 bytes */
- q = write_pcr_bits(q, get_pcr(ts, s->pb));
+ 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);
+ avio_write(s->pb, buf, TS_PACKET_SIZE);
}
static void write_pts(uint8_t *q, int fourbits, int64_t pts)
*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.
*/
static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
const uint8_t *payload, int payload_size,
- int64_t pts, int64_t dts)
+ int64_t pts, int64_t dts, int key)
{
MpegTSWriteStream *ts_st = st->priv_data;
MpegTSWrite *ts = s->priv_data;
*q++ = val;
*q++ = ts_st->pid;
ts_st->cc = (ts_st->cc + 1) & 0xf;
- *q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
+ *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);
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);
+ extend_af(buf, write_pcr_bits(q, pcr));
+ q = get_ts_payload_start(buf);
}
if (is_start) {
int pes_extension = 0;
*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;
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)
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);
+ 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_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 = 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_dts);
+ 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",
- NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
- "video/x-mpegts",
- "ts,m2t",
- 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