/*
* MPEG2 transport stream (aka DVB) muxer
- * Copyright (c) 2003 Fabrice Bellard.
+ * Copyright (c) 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
char *provider_name;
int pcr_pid;
int pcr_packet_count;
- int pcr_packet_freq;
+ int pcr_packet_period;
} MpegTSService;
typedef struct MpegTSWrite {
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
int sdt_packet_count;
- int sdt_packet_freq;
+ int sdt_packet_period;
int pat_packet_count;
- int pat_packet_freq;
+ int pat_packet_period;
int nb_services;
int onid;
int tsid;
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];
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:
/* 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];
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->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)
service->pcr_pid = ts_st->pid;
total_bit_rate += st->codec->bit_rate;
+ /* PES header size */
+ if (st->codec->codec_type == CODEC_TYPE_VIDEO ||
+ st->codec->codec_type == CODEC_TYPE_SUBTITLE) {
+ /* 1 PES per frame
+ * 19 bytes of PES header
+ * on average a half TS-packet (184/2) of padding-overhead every PES */
+ total_bit_rate += (19 + 184/2)*8 / av_q2d(st->codec->time_base);
+ } else {
+ /* 1 PES per DEFAULT_PES_PAYLOAD_SIZE bytes of audio data
+ * 14 bytes of PES header
+ * on average a half TS-packet (184/2) of padding-overhead every PES */
+ total_bit_rate += (14 + 184/2) *
+ st->codec->bit_rate / DEFAULT_PES_PAYLOAD_SIZE;
+ }
}
/* if no video stream, use the first stream as PCR */
if (total_bit_rate <= 8 * 1024)
total_bit_rate = 8 * 1024;
- service->pcr_packet_freq = (total_bit_rate * PCR_RETRANS_TIME) /
+ service->pcr_packet_period = (total_bit_rate * PCR_RETRANS_TIME) /
(TS_PACKET_SIZE * 8 * 1000);
- ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) /
+ ts->sdt_packet_period = (total_bit_rate * SDT_RETRANS_TIME) /
(TS_PACKET_SIZE * 8 * 1000);
- ts->pat_packet_freq = (total_bit_rate * PAT_RETRANS_TIME) /
+ ts->pat_packet_period = (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 = total_bit_rate;
+ 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]);
}
+ pat_pmt_size = url_ftell(s->pb) - pos;
+
+ total_bit_rate +=
+ 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_period, ts->pat_packet_period);
+
+ 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;
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++) {
if (ts_st->pid == ts_st->service->pcr_pid) {
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;
}
header_len += 5;
flags |= 0x80;
}
- if (dts != AV_NOPTS_VALUE && dts != pts) {
+ if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
header_len += 5;
flags |= 0x40;
}
len = payload_size + header_len + 3;
if (private_code != 0)
len++;
+ if (len > 0xffff)
+ len = 0;
*q++ = len >> 8;
*q++ = len;
val = 0x80;
write_pts(q, flags >> 6, pts);
q += 5;
}
- if (dts != AV_NOPTS_VALUE && dts != pts) {
+ if (dts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && dts != pts) {
write_pts(q, 1, dts);
q += 5;
}
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, AV_NOPTS_VALUE);
- return 0;
- }
+ if (pkt->pts != AV_NOPTS_VALUE)
+ pts = pkt->pts + delay;
+ if (pkt->dts != AV_NOPTS_VALUE)
+ dts = pkt->dts + delay;
- if (st->codec->codec_id == CODEC_ID_DIRAC) {
- /* for Dirac, a single PES packet must be generated */
- mpegts_write_pes(s, st, buf, size, pkt->pts, pkt->dts);
- return 0;
+ if (ts_st->first_pts_check && pts == AV_NOPTS_VALUE) {
+ av_log(s, AV_LOG_ERROR, "first pts value must set\n");
+ return -1;
}
- max_payload_size = DEFAULT_PES_PAYLOAD_SIZE;
- if (st->codec->codec_id == CODEC_ID_MPEG2VIDEO ||
- st->codec->codec_id == CODEC_ID_MPEG1VIDEO) {
- const uint8_t *p = pkt->data;
- const uint8_t *end = pkt->data+pkt->size;
- uint32_t state = -1;
- while (p < end) {
- p = ff_find_start_code(p, end, &state);
- if (state == PICTURE_START_CODE) {
- access_unit_index = p - 4;
- break;
- }
+ 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;
}
- } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
- 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_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_pts == AV_NOPTS_VALUE) {
+ ts_st->payload_dts = dts;
+ ts_st->payload_pts = pts;
}
+ // 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 (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 = pkt->dts + delay;
- ts_st->payload_pts = pkt->pts + delay;
- }
- if (ts_st->payload_index >= max_payload_size) {
+ 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_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
}
}
+
return 0;
}
projects / ffmpeg / blobdiff