#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"
} MpegTSService;
typedef struct MpegTSWrite {
+ const AVClass *av_class;
MpegTSSection pat; /* MPEG2 pat table */
MpegTSSection sdt; /* MPEG2 sdt table context */
MpegTSService **services;
static const AVOption options[] = {
{ "mpegts_transport_stream_id", "Set transport_stream_id field.",
- offsetof(MpegTSWrite, transport_stream_id), FF_OPT_TYPE_INT, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ 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, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ 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, 0x0001, 0x0001, 0xffff, AV_OPT_FLAG_ENCODING_PARAM},
+ 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, 0x1000, 0x1000, 0x1f00, AV_OPT_FLAG_ENCODING_PARAM},
+ 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, 0x0100, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
+ offsetof(MpegTSWrite, start_pid), FF_OPT_TYPE_INT, {.dbl = 0x0100 }, 0x0100, 0x0f00, AV_OPT_FLAG_ENCODING_PARAM},
{ NULL },
};
static const AVClass mpegts_muxer_class = {
- "MPEGTS muxer",
- av_default_item_name,
- options,
- LIBAVUTIL_VERSION_INT,
+ .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 */
/*********************************************/
/* mpegts writer */
-#define DEFAULT_PROVIDER_NAME "FFmpeg"
+#define DEFAULT_PROVIDER_NAME "Libav"
#define DEFAULT_SERVICE_NAME "Service01"
/* a PES packet header is generated every DEFAULT_PES_HEADER_FREQ packets */
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:
service = av_mallocz(sizeof(MpegTSService));
if (!service)
return NULL;
- service->pmt.pid = ts->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);
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;
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, ts->service_id, provider_name, service_name);
service->pmt.write_packet = section_write_packet;
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;
}
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 << 7 | pcr_low >> 8 | 0x7e;
*buf++ = pcr_low;
- return buf;
+ return 6;
}
/* Write a single null transport stream packet */
*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));
*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;
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);
}
}
AVOutputFormat ff_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,
+ .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