/*
- * MPEG2 transport stream (aka DVB) mux
- * Copyright (c) 2003 Fabrice Bellard.
+ * MPEG2 transport stream (aka DVB) muxer
+ * Copyright (c) 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* License along with FFmpeg; 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 "libavcodec/mpegvideo.h"
#include "avformat.h"
-#include "crc.h"
#include "mpegts.h"
/* 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_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;
+ uint64_t cur_pcr;
+ int mux_rate;
+} MpegTSWrite;
+
/* 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_crc04C11DB7, -1, buf, len - 4));
+ crc = bswap_32(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;
b |= 0x40;
*q++ = b;
*q++ = s->pid;
- s->cc = (s->cc + 1) & 0xf;
*q++ = 0x10 | s->cc;
+ s->cc = (s->cc + 1) & 0xf;
if (first)
*q++ = 0; /* 0 offset */
len1 = TS_PACKET_SIZE - (q - packet);
buf_ptr += len1;
len -= len1;
+
+ ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
}
}
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;
uint8_t payload[DEFAULT_PES_PAYLOAD_SIZE];
} 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;
+ AVMetadataTag *lang = av_metadata_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;
/* write optional descriptors here */
switch(st->codec->codec_type) {
case CODEC_TYPE_AUDIO:
- if (strlen(st->language) == 3) {
+ if (lang && strlen(lang->value) == 3) {
*q++ = 0x0a; /* ISO 639 language descriptor */
*q++ = 4;
- *q++ = st->language[0];
- *q++ = st->language[1];
- *q++ = st->language[2];
+ *q++ = lang->value[0];
+ *q++ = lang->value[1];
+ *q++ = lang->value[2];
*q++ = 0; /* undefined type */
}
break;
case CODEC_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];
put16(&q, 1); /* ancillary page id */
}
break;
+ case CODEC_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);
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)
MpegTSWriteStream *ts_st;
MpegTSService *service;
AVStream *st;
+ AVMetadataTag *title;
int i, total_bit_rate;
const char *service_name;
+ uint64_t sdt_size, pat_pmt_size, pos;
ts->tsid = DEFAULT_TSID;
ts->onid = DEFAULT_ONID;
/* allocate a single DVB service */
- service_name = s->title;
- if (service_name[0] == '\0')
- service_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;
ts_st->service = service;
ts_st->pid = DEFAULT_START_PID + i;
ts_st->payload_pts = AV_NOPTS_VALUE;
+ ts_st->payload_dts = AV_NOPTS_VALUE;
+ ts_st->first_pts_check = 1;
/* update PCR pid by using the first video stream */
if (st->codec->codec_type == CODEC_TYPE_VIDEO &&
service->pcr_pid == 0x1fff)
(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
+
+ ts->mux_rate = 1; // avoid div by 0
/* write info at the start of the file, so that it will be fast to
find them */
+ pos = url_ftell(s->pb);
mpegts_write_sdt(s);
+ sdt_size = url_ftell(s->pb) - pos;
+ pos = url_ftell(s->pb);
mpegts_write_pat(s);
for(i = 0; i < ts->nb_services; i++) {
mpegts_write_pmt(s, ts->services[i]);
}
- put_flush_packet(&s->pb);
+ pat_pmt_size = url_ftell(s->pb) - pos;
+
+ total_bit_rate +=
+ total_bit_rate * 25 / DEFAULT_PES_PAYLOAD_SIZE + /* PES header size */
+ total_bit_rate * 4 / TS_PACKET_SIZE + /* TS header size */
+ SDT_RETRANS_TIME * 8 * sdt_size / 1000 + /* SDT size */
+ PAT_RETRANS_TIME * 8 * pat_pmt_size / 1000 + /* PAT+PMT size */
+ PCR_RETRANS_TIME * 8 * 8 / 1000; /* PCR size */
+
+ av_log(s, AV_LOG_DEBUG, "muxrate %d freq sdt %d pat %d\n",
+ total_bit_rate, ts->sdt_packet_freq, ts->pat_packet_freq);
+
+ if (s->mux_rate)
+ ts->mux_rate = s->mux_rate;
+ else
+ ts->mux_rate = total_bit_rate;
+
+ // adjust pcr
+ ts->cur_pcr /= ts->mux_rate;
+
+ put_flush_packet(s->pb);
return 0;
}
}
+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;
+}
+
/* NOTE: pes_data contains all the PES packet */
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)
{
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 */
ts_st->service->pcr_packet_freq) {
ts_st->service->pcr_packet_count = 0;
write_pcr = 1;
- /* XXX: this is incorrect, but at least we have a PCR
- value */
- pcr = pts;
}
}
*q++ = 0x10 | ts_st->cc | (write_pcr ? 0x20 : 0);
ts_st->cc = (ts_st->cc + 1) & 0xf;
if (write_pcr) {
+ // add 11, pcr references the last byte of program clock reference base
+ pcr = ts->cur_pcr + (4+7)*8*90000LL / ts->mux_rate;
+ if (dts != AV_NOPTS_VALUE && dts < pcr)
+ 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++ = 0;
}
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;
+ if (st->codec->codec_id == CODEC_ID_DIRAC) {
+ *q++ = 0xfd;
+ } else
+ *q++ = 0xe0;
} else if (st->codec->codec_type == CODEC_TYPE_AUDIO &&
(st->codec->codec_id == CODEC_ID_MP2 ||
st->codec->codec_id == CODEC_ID_MP3)) {
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 == CODEC_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;
if (st->codec->codec_type == CODEC_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);
+ put_buffer(s->pb, buf, TS_PACKET_SIZE);
+ ts->cur_pcr += TS_PACKET_SIZE*8*90000LL/ts->mux_rate;
}
- put_flush_packet(&s->pb);
+ 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;
+ int len, size = pkt->size;
uint8_t *buf= pkt->data;
+ uint8_t *data= NULL;
MpegTSWriteStream *ts_st = st->priv_data;
- int len, max_payload_size;
+ const uint8_t *access_unit_index = NULL;
+ const uint64_t delay = av_rescale(s->max_delay, 90000, AV_TIME_BASE);
+ 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);
+ 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) {
+ if (pkt->size < 5 || AV_RB32(pkt->data) != 0x0000001) {
+ av_log(s, AV_LOG_ERROR, "h264 bitstream malformated\n");
+ return -1;
+ }
+ if (pkt->data[4] != 0x09) { // 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] = 0xe0; // any slice type
+ buf = data;
+ size = pkt->size+6;
+ }
+ access_unit_index = buf;
+ } else {
+ access_unit_index = pkt->data;
+ }
+
+ if (!access_unit_index) {
+ av_log(s, AV_LOG_ERROR, "error, could not find access unit start\n");
+ return -1;
+ }
+
+ if (st->codec->codec_type == CODEC_TYPE_SUBTITLE ||
+ st->codec->codec_type == CODEC_TYPE_VIDEO) {
+ // for video and subtitle, write a single pes packet
+ mpegts_write_pes(s, st, buf, size, pts, dts);
return 0;
}
- max_payload_size = DEFAULT_PES_PAYLOAD_SIZE;
+ // audio
while (size > 0) {
- len = max_payload_size - ts_st->payload_index;
+ len = DEFAULT_PES_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) {
+ if (access_unit_index && access_unit_index < buf &&
+ ts_st->payload_pts == AV_NOPTS_VALUE &&
+ ts_st->payload_dts == AV_NOPTS_VALUE) {
+ ts_st->payload_dts = dts;
+ ts_st->payload_pts = pts;
+ }
+ if (ts_st->payload_index >= DEFAULT_PES_PAYLOAD_SIZE) {
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_pts = AV_NOPTS_VALUE;
+ ts_st->payload_dts = AV_NOPTS_VALUE;
ts_st->payload_index = 0;
+ access_unit_index = NULL; // unset access unit to avoid setting pts/dts again
}
}
+
+ 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);
}
}
- put_flush_packet(&s->pb);
+ put_flush_packet(s->pb);
for(i = 0; i < ts->nb_services; i++) {
service = ts->services[i];
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_MPEG2VIDEO,
projects / frescor / ffmpeg.git / blobdiff