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-rw-r--r--libavformat/Makefile2
-rw-r--r--libavformat/mpegts.c930
-rw-r--r--libavformat/mpegts.h40
-rw-r--r--libavformat/mpegtsenc.c582
4 files changed, 1398 insertions, 156 deletions
diff --git a/libavformat/Makefile b/libavformat/Makefile
index a9b8b65dee..647e687844 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -12,7 +12,7 @@ OBJS= utils.o cutils.o allformats.o
PPOBJS=
# mux and demuxes
-OBJS+=mpeg.o mpegts.o ffm.o crc.o img.o raw.o rm.o \
+OBJS+=mpeg.o mpegts.o mpegtsenc.o ffm.o crc.o img.o raw.o rm.o \
avienc.o avidec.o wav.o swf.o au.o gif.o mov.o mpjpeg.o dv.o \
yuv4mpeg.o 4xm.o
diff --git a/libavformat/mpegts.c b/libavformat/mpegts.c
index 92e1d51389..8e2898398b 100644
--- a/libavformat/mpegts.c
+++ b/libavformat/mpegts.c
@@ -1,6 +1,6 @@
/*
* MPEG2 transport stream (aka DVB) demux
- * Copyright (c) 2002 Fabrice Bellard.
+ * Copyright (c) 2002-2003 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -18,42 +18,193 @@
*/
#include "avformat.h"
-#define TS_FEC_PACKET_SIZE 204
-#define TS_PACKET_SIZE 188
-#define NB_PID_MAX 8192
+#include "mpegts.h"
-enum MpegTSState {
- MPEGTS_HEADER = 0,
- MPEGTS_PESHEADER_FILL,
- MPEGTS_PESHEADER_FLAGS,
- MPEGTS_PESHEADER_SIZE,
- MPEGTS_PESHEADER_READ,
- MPEGTS_PAYLOAD,
- MPEGTS_SKIP,
+//#define DEBUG_SI
+
+/* 1.0 second at 24Mbit/s */
+#define MAX_SCAN_PACKETS 16000
+
+static int add_pes_stream(AVFormatContext *s, int pid);
+
+enum MpegTSFilterType {
+ MPEGTS_PES,
+ MPEGTS_SECTION,
};
-/* enough for PES header + length */
-#define MAX_HEADER_SIZE 6
+/* XXX: suppress 'pkt' parameter */
+typedef void PESCallback(void *opaque, const uint8_t *buf, int len, int is_start);
-typedef struct MpegTSStream {
+typedef struct MpegTSPESFilter {
+ PESCallback *pes_cb;
+ void *opaque;
+} MpegTSPESFilter;
+
+typedef void SectionCallback(void *opaque, const uint8_t *buf, int len);
+
+typedef void SetServiceCallback(void *opaque, int ret);
+
+typedef struct MpegTSSectionFilter {
+ int section_index;
+ int section_h_size;
+ uint8_t *section_buf;
+ int check_crc:1;
+ int end_of_section_reached:1;
+ SectionCallback *section_cb;
+ void *opaque;
+} MpegTSSectionFilter;
+
+typedef struct MpegTSFilter {
int pid;
- enum MpegTSState state;
int last_cc; /* last cc code (-1 if first packet) */
- /* used to get the format */
- int header_size;
- int payload_size;
- int pes_header_size;
- AVStream *st;
- unsigned char header[MAX_HEADER_SIZE];
-} MpegTSStream;
+ enum MpegTSFilterType type;
+ union {
+ MpegTSPESFilter pes_filter;
+ MpegTSSectionFilter section_filter;
+ } u;
+} MpegTSFilter;
+
+typedef struct MpegTSService {
+ int running:1;
+ int sid;
+ char *provider_name;
+ char *name;
+} MpegTSService;
typedef struct MpegTSContext {
+ /* user data */
+ AVFormatContext *stream;
int raw_packet_size; /* raw packet size, including FEC if present */
- MpegTSStream *pids[NB_PID_MAX];
+ int auto_guess; /* if true, all pids are analized to find streams */
+ int set_service_ret;
+
+ /* data needed to handle file based ts */
+ int stop_parse; /* stop parsing loop */
+ AVPacket *pkt; /* packet containing av data */
+
+ /******************************************/
+ /* private mpegts data */
+ /* scan context */
+ MpegTSFilter *sdt_filter;
+ int nb_services;
+ MpegTSService **services;
+
+ /* set service context (XXX: allocated it ?) */
+ SetServiceCallback *set_service_cb;
+ void *set_service_opaque;
+ MpegTSFilter *pat_filter;
+ MpegTSFilter *pmt_filter;
+ int req_sid;
+
+ MpegTSFilter *pids[NB_PID_MAX];
} MpegTSContext;
+static void write_section_data(AVFormatContext *s, MpegTSFilter *tss1,
+ const uint8_t *buf, int buf_size, int is_start)
+{
+ MpegTSSectionFilter *tss = &tss1->u.section_filter;
+ int len;
+ unsigned int crc;
+
+ if (is_start) {
+ memcpy(tss->section_buf, buf, buf_size);
+ tss->section_index = buf_size;
+ tss->section_h_size = -1;
+ tss->end_of_section_reached = 0;
+ } else {
+ if (tss->end_of_section_reached)
+ return;
+ len = 4096 - tss->section_index;
+ if (buf_size < len)
+ len = buf_size;
+ memcpy(tss->section_buf + tss->section_index, buf, len);
+ tss->section_index += len;
+ }
+
+ /* compute section length if possible */
+ if (tss->section_h_size == -1 && tss->section_index >= 3) {
+ len = (((tss->section_buf[1] & 0xf) << 8) | tss->section_buf[2]) + 3;
+ if (len > 4096)
+ return;
+ tss->section_h_size = len;
+ }
+
+ if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
+ if (tss->check_crc) {
+ crc = mpegts_crc32(tss->section_buf, tss->section_h_size);
+ if (crc != 0)
+ goto invalid_crc;
+ }
+ tss->section_cb(tss->opaque, tss->section_buf, tss->section_h_size);
+ invalid_crc:
+ tss->end_of_section_reached = 1;
+ }
+}
+
+MpegTSFilter *mpegts_open_section_filter(MpegTSContext *ts, unsigned int pid,
+ SectionCallback *section_cb, void *opaque,
+ int check_crc)
+
+{
+ MpegTSFilter *filter;
+ MpegTSSectionFilter *sec;
+
+ if (pid >= NB_PID_MAX || ts->pids[pid])
+ return NULL;
+ filter = av_mallocz(sizeof(MpegTSFilter));
+ if (!filter)
+ return NULL;
+ ts->pids[pid] = filter;
+ filter->type = MPEGTS_SECTION;
+ filter->pid = pid;
+ filter->last_cc = -1;
+ sec = &filter->u.section_filter;
+ sec->section_cb = section_cb;
+ sec->opaque = opaque;
+ sec->section_buf = av_malloc(MAX_SECTION_SIZE);
+ sec->check_crc = check_crc;
+ if (!sec->section_buf) {
+ av_free(filter);
+ return NULL;
+ }
+ return filter;
+}
+
+MpegTSFilter *mpegts_open_pes_filter(MpegTSContext *ts, unsigned int pid,
+ PESCallback *pes_cb,
+ void *opaque)
+{
+ MpegTSFilter *filter;
+ MpegTSPESFilter *pes;
+
+ if (pid >= NB_PID_MAX || ts->pids[pid])
+ return NULL;
+ filter = av_mallocz(sizeof(MpegTSFilter));
+ if (!filter)
+ return NULL;
+ ts->pids[pid] = filter;
+ filter->type = MPEGTS_PES;
+ filter->pid = pid;
+ filter->last_cc = -1;
+ pes = &filter->u.pes_filter;
+ pes->pes_cb = pes_cb;
+ pes->opaque = opaque;
+ return filter;
+}
+
+void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
+{
+ int pid;
+
+ pid = filter->pid;
+ if (filter->type == MPEGTS_SECTION)
+ av_freep(&filter->u.section_filter.section_buf);
+ av_free(filter);
+ ts->pids[pid] = NULL;
+}
+
/* autodetect fec presence. Must have at least 1024 bytes */
-static int get_packet_size(const unsigned char *buf, int size)
+static int get_packet_size(const uint8_t *buf, int size)
{
int i;
@@ -72,78 +223,400 @@ static int get_packet_size(const unsigned char *buf, int size)
return TS_FEC_PACKET_SIZE;
}
-static int mpegts_probe(AVProbeData *p)
+typedef struct SectionHeader {
+ uint8_t tid;
+ uint16_t id;
+ uint8_t version;
+ uint8_t sec_num;
+ uint8_t last_sec_num;
+} SectionHeader;
+
+static inline int get8(const uint8_t **pp, const uint8_t *p_end)
{
- int size;
- size = get_packet_size(p->buf, p->buf_size);
- if (size < 0)
- return 0;
- return AVPROBE_SCORE_MAX - 1;
+ const uint8_t *p;
+ int c;
+
+ p = *pp;
+ if (p >= p_end)
+ return -1;
+ c = *p++;
+ *pp = p;
+ return c;
}
-static int mpegts_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static inline int get16(const uint8_t **pp, const uint8_t *p_end)
+{
+ const uint8_t *p;
+ int c;
+
+ p = *pp;
+ if ((p + 1) >= p_end)
+ return -1;
+ c = (p[0] << 8) | p[1];
+ p += 2;
+ *pp = p;
+ return c;
+}
+
+/* read and allocate a DVB string preceeded by its length */
+static char *getstr8(const uint8_t **pp, const uint8_t *p_end)
{
- MpegTSContext *ts = s->priv_data;
- ByteIOContext *pb = &s->pb;
- unsigned char buf[1024];
int len;
- int64_t pos;
+ const uint8_t *p;
+ char *str;
- /* read the first 1024 bytes to get packet size */
- pos = url_ftell(pb);
- len = get_buffer(pb, buf, sizeof(buf));
- if (len != sizeof(buf))
- goto fail;
- ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
- if (ts->raw_packet_size <= 0)
- goto fail;
- /* go again to the start */
- url_fseek(pb, pos, SEEK_SET);
+ p = *pp;
+ len = get8(&p, p_end);
+ if (len < 0)
+ return NULL;
+ if ((p + len) > p_end)
+ return NULL;
+ str = av_malloc(len + 1);
+ if (!str)
+ return NULL;
+ memcpy(str, p, len);
+ str[len] = '\0';
+ p += len;
+ *pp = p;
+ return str;
+}
+
+static int parse_section_header(SectionHeader *h,
+ const uint8_t **pp, const uint8_t *p_end)
+{
+ int val;
+
+ val = get8(pp, p_end);
+ if (val < 0)
+ return -1;
+ h->tid = val;
+ *pp += 2;
+ val = get16(pp, p_end);
+ if (val < 0)
+ return -1;
+ h->id = val;
+ val = get8(pp, p_end);
+ if (val < 0)
+ return -1;
+ h->version = (val >> 1) & 0x1f;
+ val = get8(pp, p_end);
+ if (val < 0)
+ return -1;
+ h->sec_num = val;
+ val = get8(pp, p_end);
+ if (val < 0)
+ return -1;
+ h->last_sec_num = val;
return 0;
- fail:
- return -1;
+}
+
+static MpegTSService *new_service(MpegTSContext *ts, int sid,
+ char *provider_name, char *name)
+{
+ MpegTSService *service;
+
+#ifdef DEBUG_SI
+ printf("new_service: sid=0x%04x provider='%s' name='%s'\n",
+ sid, provider_name, name);
+#endif
+
+ service = av_mallocz(sizeof(MpegTSService));
+ if (!service)
+ return NULL;
+ service->sid = sid;
+ service->provider_name = provider_name;
+ service->name = name;
+ dynarray_add(&ts->services, &ts->nb_services, service);
+ return service;
+}
+
+static void pmt_cb(void *opaque, const uint8_t *section, int section_len)
+{
+ MpegTSContext *ts = opaque;
+ SectionHeader h1, *h = &h1;
+ const uint8_t *p, *p_end;
+ int program_info_length, pcr_pid, pid, stream_type, desc_length;
+
+#ifdef DEBUG_SI
+ printf("PMT:\n");
+ av_hex_dump((uint8_t *)section, section_len);
+#endif
+ p_end = section + section_len - 4;
+ p = section;
+ if (parse_section_header(h, &p, p_end) < 0)
+ return;
+#ifdef DEBUG_SI
+ printf("sid=0x%x sec_num=%d/%d\n", h->id, h->sec_num, h->last_sec_num);
+#endif
+ if (h->tid != PMT_TID || h->id != ts->req_sid)
+ return;
+
+ pcr_pid = get16(&p, p_end) & 0x1fff;
+ if (pcr_pid < 0)
+ return;
+#ifdef DEBUG_SI
+ printf("pcr_pid=0x%x\n", pcr_pid);
+#endif
+ program_info_length = get16(&p, p_end) & 0xfff;
+ if (program_info_length < 0)
+ return;
+ p += program_info_length;
+ if (p >= p_end)
+ return;
+ for(;;) {
+ stream_type = get8(&p, p_end);
+ if (stream_type < 0)
+ break;
+ pid = get16(&p, p_end) & 0x1fff;
+ if (pid < 0)
+ break;
+ desc_length = get16(&p, p_end) & 0xfff;
+ if (desc_length < 0)
+ break;
+ p += desc_length;
+ if (p > p_end)
+ return;
+
+#ifdef DEBUG_SI
+ printf("stream_type=%d pid=0x%x\n", stream_type, pid);
+#endif
+
+ /* now create ffmpeg stream */
+ switch(stream_type) {
+ case STREAM_TYPE_AUDIO:
+ case STREAM_TYPE_VIDEO:
+ add_pes_stream(ts->stream, pid);
+ break;
+ default:
+ /* we ignore the other streams */
+ break;
+ }
+ }
+ /* all parameters are there */
+ ts->set_service_cb(ts->set_service_opaque, 0);
+ mpegts_close_filter(ts, ts->pmt_filter);
+ ts->pmt_filter = NULL;
+}
+
+static void pat_cb(void *opaque, const uint8_t *section, int section_len)
+{
+ MpegTSContext *ts = opaque;
+ SectionHeader h1, *h = &h1;
+ const uint8_t *p, *p_end;
+ int sid, pmt_pid;
+
+#ifdef DEBUG_SI
+ printf("PAT:\n");
+ av_hex_dump((uint8_t *)section, section_len);
+#endif
+ p_end = section + section_len - 4;
+ p = section;
+ if (parse_section_header(h, &p, p_end) < 0)
+ return;
+ if (h->tid != PAT_TID)
+ return;
+
+ for(;;) {
+ sid = get16(&p, p_end);
+ if (sid < 0)
+ break;
+ pmt_pid = get16(&p, p_end) & 0x1fff;
+ if (pmt_pid < 0)
+ break;
+#ifdef DEBUG_SI
+ printf("sid=0x%x pid=0x%x\n", sid, pmt_pid);
+#endif
+ if (sid == 0x0000) {
+ /* NIT info */
+ } else {
+ if (ts->req_sid == sid) {
+ ts->pmt_filter = mpegts_open_section_filter(ts, pmt_pid,
+ pmt_cb, ts, 1);
+ goto found;
+ }
+ }
+ }
+ /* not found */
+ ts->set_service_cb(ts->set_service_opaque, -1);
+
+ found:
+ mpegts_close_filter(ts, ts->pat_filter);
+ ts->pat_filter = NULL;
+}
+
+void mpegts_set_service(MpegTSContext *ts, int sid,
+ SetServiceCallback *set_service_cb, void *opaque)
+{
+ ts->set_service_cb = set_service_cb;
+ ts->set_service_opaque = opaque;
+ ts->req_sid = sid;
+ ts->pat_filter = mpegts_open_section_filter(ts, PAT_PID,
+ pat_cb, ts, 1);
+}
+
+static void sdt_cb(void *opaque, const uint8_t *section, int section_len)
+{
+ MpegTSContext *ts = opaque;
+ SectionHeader h1, *h = &h1;
+ const uint8_t *p, *p_end, *desc_list_end, *desc_end;
+ int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
+ char *name, *provider_name;
+
+#ifdef DEBUG_SI
+ printf("SDT:\n");
+ av_hex_dump((uint8_t *)section, section_len);
+#endif
+
+ p_end = section + section_len - 4;
+ p = section;
+ if (parse_section_header(h, &p, p_end) < 0)
+ return;
+ if (h->tid != SDT_TID)
+ return;
+ onid = get16(&p, p_end);
+ if (onid < 0)
+ return;
+ val = get8(&p, p_end);
+ if (val < 0)
+ return;
+ for(;;) {
+ sid = get16(&p, p_end);
+ if (sid < 0)
+ break;
+ val = get8(&p, p_end);
+ if (val < 0)
+ break;
+ desc_list_len = get16(&p, p_end) & 0xfff;
+ if (desc_list_len < 0)
+ break;
+ desc_list_end = p + desc_list_len;
+ if (desc_list_end > p_end)
+ break;
+ for(;;) {
+ desc_tag = get8(&p, desc_list_end);
+ if (desc_tag < 0)
+ break;
+ desc_len = get8(&p, desc_list_end);
+ desc_end = p + desc_len;
+ if (desc_end > desc_list_end)
+ break;
+#ifdef DEBUG_SI
+ printf("tag: 0x%02x len=%d\n", desc_tag, desc_len);
+#endif
+ switch(desc_tag) {
+ case 0x48:
+ service_type = get8(&p, p_end);
+ if (service_type < 0)
+ break;
+ provider_name = getstr8(&p, p_end);
+ if (!provider_name)
+ break;
+ name = getstr8(&p, p_end);
+ if (!name)
+ break;
+ new_service(ts, sid, provider_name, name);
+ break;
+ default:
+ break;
+ }
+ p = desc_end;
+ }
+ p = desc_list_end;
+ }
+ ts->stop_parse = 1;
+
+ /* remove filter */
+ mpegts_close_filter(ts, ts->sdt_filter);
+ ts->sdt_filter = NULL;
+}
+
+/* scan services an a transport stream by looking at the sdt */
+void mpegts_scan_sdt(MpegTSContext *ts)
+{
+ ts->sdt_filter = mpegts_open_section_filter(ts, SDT_PID,
+ sdt_cb, ts, 1);
+}
+
+
+/* TS stream handling */
+
+enum MpegTSState {
+ MPEGTS_HEADER = 0,
+ MPEGTS_PESHEADER_FILL,
+ MPEGTS_PAYLOAD,
+ MPEGTS_SKIP,
+};
+
+/* enough for PES header + length */
+#define PES_START_SIZE 9
+#define MAX_PES_HEADER_SIZE (9 + 255)
+
+typedef struct PESContext {
+ int pid;
+ AVFormatContext *stream;
+ AVStream *st;
+ enum MpegTSState state;
+ /* used to get the format */
+ int data_index;
+ int total_size;
+ int pes_header_size;
+ int64_t pts, dts;
+ uint8_t header[MAX_PES_HEADER_SIZE];
+} PESContext;
+
+static int64_t get_pts(const uint8_t *p)
+{
+ int64_t pts;
+ int val;
+
+ pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
+ val = (p[1] << 8) | p[2];
+ pts |= (int64_t)(val >> 1) << 15;
+ val = (p[3] << 8) | p[4];
+ pts |= (int64_t)(val >> 1);
+ return pts;
}
/* return non zero if a packet could be constructed */
-static int mpegts_push_data(AVFormatContext *s, MpegTSStream *tss,
- AVPacket *pkt,
- const unsigned char *buf, int buf_size, int is_start)
+static void mpegts_push_data(void *opaque,
+ const uint8_t *buf, int buf_size, int is_start)
{
+ PESContext *pes = opaque;
+ MpegTSContext *ts = pes->stream->priv_data;
AVStream *st;
- const unsigned char *p;
+ const uint8_t *p;
int len, code, codec_type, codec_id;
-
+
if (is_start) {
- tss->state = MPEGTS_HEADER;
- tss->header_size = 0;
+ pes->state = MPEGTS_HEADER;
+ pes->data_index = 0;
}
p = buf;
while (buf_size > 0) {
- len = buf_size;
- switch(tss->state) {
+ switch(pes->state) {
case MPEGTS_HEADER:
- if (len > MAX_HEADER_SIZE - tss->header_size)
- len = MAX_HEADER_SIZE - tss->header_size;
- memcpy(tss->header, p, len);
- tss->header_size += len;
+ len = PES_START_SIZE - pes->data_index;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
p += len;
buf_size -= len;
- if (tss->header_size == MAX_HEADER_SIZE) {
+ if (pes->data_index == PES_START_SIZE) {
/* we got all the PES or section header. We can now
decide */
#if 0
- av_hex_dump(tss->header, tss->header_size);
+ av_hex_dump(pes->header, pes->data_index);
#endif
- if (tss->header[0] == 0x00 && tss->header[1] == 0x00 &&
- tss->header[2] == 0x01) {
+ if (pes->header[0] == 0x00 && pes->header[1] == 0x00 &&
+ pes->header[2] == 0x01) {
/* it must be an mpeg2 PES stream */
/* XXX: add AC3 support */
- code = tss->header[3] | 0x100;
+ code = pes->header[3] | 0x100;
if (!((code >= 0x1c0 && code <= 0x1df) ||
(code >= 0x1e0 && code <= 0x1ef)))
goto skip;
- if (!tss->st) {
+ if (!pes->st) {
/* allocate stream */
if (code >= 0x1c0 && code <= 0x1df) {
codec_type = CODEC_TYPE_AUDIO;
@@ -152,23 +625,26 @@ static int mpegts_push_data(AVFormatContext *s, MpegTSStream *tss,
codec_type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_MPEG1VIDEO;
}
- st = av_new_stream(s, tss->pid);
+ st = av_new_stream(pes->stream, pes->pid);
if (st) {
- st->priv_data = tss;
+ st->priv_data = pes;
st->codec.codec_type = codec_type;
st->codec.codec_id = codec_id;
- tss->st = st;
+ pes->st = st;
}
}
- tss->state = MPEGTS_PESHEADER_FILL;
- tss->payload_size = (tss->header[4] << 8) | tss->header[5];
- if (tss->payload_size == 0)
- tss->payload_size = 65536;
+ pes->state = MPEGTS_PESHEADER_FILL;
+ pes->total_size = (pes->header[4] << 8) | pes->header[5];
+ /* NOTE: a zero total size means the PES size is
+ unbounded */
+ if (pes->total_size)
+ pes->total_size += 6;
+ pes->pes_header_size = pes->header[8] + 9;
} else {
/* otherwise, it should be a table */
/* skip packet */
skip:
- tss->state = MPEGTS_SKIP;
+ pes->state = MPEGTS_SKIP;
continue;
}
}
@@ -176,49 +652,54 @@ static int mpegts_push_data(AVFormatContext *s, MpegTSStream *tss,
/**********************************************/
/* PES packing parsing */
case MPEGTS_PESHEADER_FILL:
- /* skip filling */
- code = *p++;
- buf_size--;
- tss->payload_size--;
- if (code != 0xff) {
- if ((code & 0xc0) != 0x80)
- goto skip;
- tss->state = MPEGTS_PESHEADER_FLAGS;
- }
- break;
- case MPEGTS_PESHEADER_FLAGS:
- code = *p++;
- buf_size--;
- tss->payload_size--;
- tss->state = MPEGTS_PESHEADER_SIZE;
- break;
- case MPEGTS_PESHEADER_SIZE:
- tss->pes_header_size = *p++;
- buf_size--;
- tss->payload_size--;
- tss->state = MPEGTS_PESHEADER_READ;
- break;
- case MPEGTS_PESHEADER_READ:
- /* currently we do nothing except skipping */
- if (len > tss->pes_header_size)
- len = tss->pes_header_size;
+ len = pes->pes_header_size - pes->data_index;
+ if (len > buf_size)
+ len = buf_size;
+ memcpy(pes->header + pes->data_index, p, len);
+ pes->data_index += len;
p += len;
buf_size -= len;
- tss->pes_header_size -= len;
- tss->payload_size -= len;
- if (tss->pes_header_size == 0)
- tss->state = MPEGTS_PAYLOAD;
+ if (pes->data_index == pes->pes_header_size) {
+ const uint8_t *r;
+ unsigned int flags;
+
+ flags = pes->header[7];
+ r = pes->header + 9;
+ pes->pts = AV_NOPTS_VALUE;
+ pes->dts = AV_NOPTS_VALUE;
+ if ((flags & 0xc0) == 0x80) {
+ pes->pts = get_pts(r);
+ r += 5;
+ } else if ((flags & 0xc0) == 0xc0) {
+ pes->pts = get_pts(r);
+ r += 5;
+ pes->dts = get_pts(r);
+ r += 5;
+ }
+ /* we got the full header. We parse it and get the payload */
+ pes->state = MPEGTS_PAYLOAD;
+ }
break;
case MPEGTS_PAYLOAD:
- if (len > tss->payload_size)
- len = tss->payload_size;
+ if (pes->total_size) {
+ len = pes->total_size - pes->data_index;
+ if (len > buf_size)
+ len = buf_size;
+ } else {
+ len = buf_size;
+ }
if (len > 0) {
- if (tss->st && av_new_packet(pkt, buf_size) == 0) {
- memcpy(pkt->data, p, buf_size);
- pkt->stream_index = tss->st->index;
- return 1;
+ AVPacket *pkt = ts->pkt;
+ if (pes->st && av_new_packet(pkt, len) == 0) {
+ memcpy(pkt->data, p, len);
+ pkt->stream_index = pes->st->index;
+ pkt->pts = pes->pts;
+ /* reset pts values */
+ pes->pts = AV_NOPTS_VALUE;
+ pes->dts = AV_NOPTS_VALUE;
+ ts->stop_parse = 1;
+ return;
}
- tss->payload_size -= len;
}
buf_size = 0;
break;
@@ -227,20 +708,110 @@ static int mpegts_push_data(AVFormatContext *s, MpegTSStream *tss,
break;
}
}
+}
+
+static int add_pes_stream(AVFormatContext *s, int pid)
+{
+ MpegTSContext *ts = s->priv_data;
+ MpegTSFilter *tss;
+ PESContext *pes;
+
+ /* if no pid found, then add a pid context */
+ pes = av_mallocz(sizeof(PESContext));
+ if (!pes)
+ return -1;
+ pes->stream = s;
+ pes->pid = pid;
+ tss = mpegts_open_pes_filter(ts, pid, mpegts_push_data, pes);
+ if (!tss) {
+ av_free(pes);
+ return -1;
+ }
return 0;
}
-static int mpegts_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+/* handle one TS packet */
+static void handle_packet(AVFormatContext *s, uint8_t *packet)
{
MpegTSContext *ts = s->priv_data;
- MpegTSStream *tss;
- ByteIOContext *pb = &s->pb;
- unsigned char packet[TS_FEC_PACKET_SIZE];
- int len, pid, cc, cc_ok, afc;
- const unsigned char *p;
+ MpegTSFilter *tss;
+ int len, pid, cc, cc_ok, afc, is_start;
+ const uint8_t *p, *p_end;
+
+ pid = ((packet[1] & 0x1f) << 8) | packet[2];
+ is_start = packet[1] & 0x40;
+ tss = ts->pids[pid];
+ if (ts->auto_guess && tss == NULL && is_start) {
+ add_pes_stream(s, pid);
+ tss = ts->pids[pid];
+ }
+ if (!tss)
+ return;
+
+ /* continuity check (currently not used) */
+ cc = (packet[3] & 0xf);
+ cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
+ tss->last_cc = cc;
+ /* skip adaptation field */
+ afc = (packet[3] >> 4) & 3;
+ p = packet + 4;
+ if (afc == 0) /* reserved value */
+ return;
+ if (afc == 2) /* adaptation field only */
+ return;
+ if (afc == 3) {
+ /* skip adapation field */
+ p += p[0] + 1;
+ }
+ /* if past the end of packet, ignore */
+ p_end = packet + TS_PACKET_SIZE;
+ if (p >= p_end)
+ return;
+
+ if (tss->type == MPEGTS_SECTION) {
+ if (is_start) {
+ /* pointer field present */
+ len = *p++;
+ if (p + len > p_end)
+ return;
+ if (len && cc_ok) {
+ /* write remaning section bytes */
+ write_section_data(s, tss,
+ p, len, 0);
+ }
+ p += len;
+ if (p < p_end) {
+ write_section_data(s, tss,
+ p, p_end - p, 1);
+ }
+ } else {
+ if (cc_ok) {
+ write_section_data(s, tss,
+ p, p_end - p, 0);
+ }
+ }
+ } else {
+ tss->u.pes_filter.pes_cb(tss->u.pes_filter.opaque,
+ p, p_end - p, is_start);
+ }
+}
+
+static int handle_packets(AVFormatContext *s, int nb_packets)
+{
+ MpegTSContext *ts = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ uint8_t packet[TS_FEC_PACKET_SIZE];
+ int packet_num, len;
+
+ ts->stop_parse = 0;
+ packet_num = 0;
for(;;) {
+ if (ts->stop_parse)
+ break;
+ packet_num++;
+ if (nb_packets != 0 && packet_num >= nb_packets)
+ break;
len = get_buffer(pb, packet, ts->raw_packet_size);
if (len != ts->raw_packet_size)
return AVERROR_IO;
@@ -248,45 +819,93 @@ static int mpegts_read_packet(AVFormatContext *s,
/* XXX: accept to resync ? */
if (packet[0] != 0x47)
return AVERROR_INVALIDDATA;
-
- pid = ((packet[1] & 0x1f) << 8) | packet[2];
- tss = ts->pids[pid];
- if (tss == NULL) {
- /* if no pid found, then add a pid context */
- tss = av_mallocz(sizeof(MpegTSStream));
- if (!tss)
- continue;
- ts->pids[pid] = tss;
- tss->pid = pid;
- tss->last_cc = -1;
- // printf("new pid=0x%x\n", pid);
- }
+ handle_packet(s, packet);
+ }
+ return 0;
+}
- /* continuity check (currently not used) */
- cc = (packet[3] & 0xf);
- cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
- tss->last_cc = cc;
-
- /* skip adaptation field */
- afc = (packet[3] >> 4) & 3;
- p = packet + 4;
- if (afc == 0) /* reserved value */
- continue;
- if (afc == 2) /* adaptation field only */
- continue;
- if (afc == 3) {
- /* skip adapation field */
- p += p[0] + 1;
- }
- /* if past the end of packet, ignore */
- if (p >= packet + TS_PACKET_SIZE)
- continue;
+static int mpegts_probe(AVProbeData *p)
+{
+ int size;
+ size = get_packet_size(p->buf, p->buf_size);
+ if (size < 0)
+ return 0;
+ return AVPROBE_SCORE_MAX - 1;
+}
+
+void set_service_cb(void *opaque, int ret)
+{
+ MpegTSContext *ts = opaque;
+ ts->set_service_ret = ret;
+ ts->stop_parse = 1;
+}
+
+static int mpegts_read_header(AVFormatContext *s,
+ AVFormatParameters *ap)
+{
+ MpegTSContext *ts = s->priv_data;
+ ByteIOContext *pb = &s->pb;
+ uint8_t buf[1024];
+ int len;
+ int64_t pos;
+ MpegTSService *service;
- if (mpegts_push_data(s, tss, pkt, p, TS_PACKET_SIZE - (p - packet),
- packet[1] & 0x40))
- break;
+ /* read the first 1024 bytes to get packet size */
+ pos = url_ftell(pb);
+ len = get_buffer(pb, buf, sizeof(buf));
+ if (len != sizeof(buf))
+ goto fail;
+ ts->raw_packet_size = get_packet_size(buf, sizeof(buf));
+ if (ts->raw_packet_size <= 0)
+ goto fail;
+ ts->auto_guess = 0;
+
+ if (!ts->auto_guess) {
+
+ /* first do a scaning to get all the services */
+ url_fseek(pb, pos, SEEK_SET);
+ mpegts_scan_sdt(ts);
+
+ handle_packets(s, MAX_SCAN_PACKETS);
+
+ /* if no service found, no need to do anything */
+ if (ts->nb_services <= 0)
+ return -1;
+
+ /* now find the info for the first service */
+
+ url_fseek(pb, pos, SEEK_SET);
+ service = ts->services[0];
+#ifdef DEBUG_SI
+ printf("tuning to '%s'\n", service->name);
+#endif
+ /* tune to first service found */
+ ts->stream = s;
+ mpegts_set_service(ts, service->sid, set_service_cb, ts);
+
+ handle_packets(s, MAX_SCAN_PACKETS);
+
+ /* if could not find service, exit */
+ if (ts->set_service_ret != 0)
+ return -1;
+
+#ifdef DEBUG_SI
+ printf("tuning done\n");
+#endif
}
+
+ url_fseek(pb, pos, SEEK_SET);
return 0;
+ fail:
+ return -1;
+}
+
+static int mpegts_read_packet(AVFormatContext *s,
+ AVPacket *pkt)
+{
+ MpegTSContext *ts = s->priv_data;
+ ts->pkt = pkt;
+ return handle_packets(s, 0);
}
static int mpegts_read_close(AVFormatContext *s)
@@ -312,5 +931,6 @@ AVInputFormat mpegts_demux = {
int mpegts_init(void)
{
av_register_input_format(&mpegts_demux);
+ av_register_output_format(&mpegts_mux);
return 0;
}
diff --git a/libavformat/mpegts.h b/libavformat/mpegts.h
new file mode 100644
index 0000000000..df0b6de216
--- /dev/null
+++ b/libavformat/mpegts.h
@@ -0,0 +1,40 @@
+/*
+ * MPEG2 transport stream defines
+ * Copyright (c) 2003 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#define TS_FEC_PACKET_SIZE 204
+#define TS_PACKET_SIZE 188
+#define NB_PID_MAX 8192
+#define MAX_SECTION_SIZE 4096
+
+/* pids */
+#define PAT_PID 0x0000
+#define SDT_PID 0x0011
+
+/* table ids */
+#define PAT_TID 0x00
+#define PMT_TID 0x02
+#define SDT_TID 0x42
+
+#define STREAM_TYPE_VIDEO 0x02
+#define STREAM_TYPE_AUDIO 0x03
+#define STREAM_TYPE_PRIVATE_SECTION 0x05
+#define STREAM_TYPE_PRIVATE_DATA 0x06
+
+unsigned int mpegts_crc32(const uint8_t *data, int len);
+extern AVOutputFormat mpegts_mux;
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
new file mode 100644
index 0000000000..079f4c724c
--- /dev/null
+++ b/libavformat/mpegtsenc.c
@@ -0,0 +1,582 @@
+/*
+ * MPEG2 transport stream (aka DVB) mux
+ * Copyright (c) 2003 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include "avformat.h"
+
+#include "mpegts.h"
+
+/* write DVB SI sections */
+
+static uint32_t crc_table[256] = {
+ 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
+ 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
+ 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
+ 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
+ 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
+ 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
+ 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef,
+ 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
+ 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb,
+ 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
+ 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
+ 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
+ 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4,
+ 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
+ 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
+ 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
+ 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc,
+ 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
+ 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050,
+ 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
+ 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
+ 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
+ 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1,
+ 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
+ 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
+ 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
+ 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9,
+ 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
+ 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd,
+ 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
+ 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
+ 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
+ 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2,
+ 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
+ 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
+ 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
+ 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a,
+ 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
+ 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676,
+ 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
+ 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
+ 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
+ 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
+};
+
+unsigned int mpegts_crc32(const uint8_t *data, int len)
+{
+ register int i;
+ unsigned int crc = 0xffffffff;
+
+ for (i=0; i<len; i++)
+ crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *data++) & 0xff];
+
+ return crc;
+}
+
+/*********************************************/
+/* mpegts section writer */
+
+typedef struct MpegTSSection {
+ int pid;
+ int cc;
+ void (*write_packet)(struct MpegTSSection *s, const uint8_t *packet);
+ void *opaque;
+} MpegTSSection;
+
+/* NOTE: 4 bytes must be left at the end for the crc32 */
+void mpegts_write_section(MpegTSSection *s, uint8_t *buf, int len)
+{
+ unsigned int crc;
+ unsigned char packet[TS_PACKET_SIZE];
+ const unsigned char *buf_ptr;
+ unsigned char *q;
+ int first, b, len1, left;
+
+ crc = mpegts_crc32(buf, len - 4);
+ buf[len - 4] = (crc >> 24) & 0xff;
+ buf[len - 3] = (crc >> 16) & 0xff;
+ buf[len - 2] = (crc >> 8) & 0xff;
+ buf[len - 1] = (crc) & 0xff;
+
+ /* send each packet */
+ buf_ptr = buf;
+ while (len > 0) {
+ first = (buf == buf_ptr);
+ q = packet;
+ *q++ = 0x47;
+ b = (s->pid >> 8);
+ if (first)
+ b |= 0x40;
+ *q++ = b;
+ *q++ = s->pid;
+ s->cc = (s->cc + 1) & 0xf;
+ *q++ = 0x10 | s->cc;
+ if (first)
+ *q++ = 0; /* 0 offset */
+ len1 = TS_PACKET_SIZE - (q - packet);
+ if (len1 > len)
+ len1 = len;
+ memcpy(q, buf_ptr, len1);
+ q += len1;
+ /* add known padding data */
+ left = TS_PACKET_SIZE - (q - packet);
+ if (left > 0)
+ memset(q, 0xff, left);
+
+ s->write_packet(s, packet);
+
+ buf_ptr += len1;
+ len -= len1;
+ }
+}
+
+static inline void put16(uint8_t **q_ptr, int val)
+{
+ uint8_t *q;
+ q = *q_ptr;
+ *q++ = val >> 8;
+ *q++ = val;
+ *q_ptr = q;
+}
+
+int mpegts_write_section1(MpegTSSection *s, int tid, int id,
+ int version, int sec_num, int last_sec_num,
+ uint8_t *buf, int len)
+{
+ uint8_t section[1024], *q;
+ unsigned int tot_len;
+
+ tot_len = 3 + 5 + len + 4;
+ /* check if not too big */
+ if (tot_len > 1024)
+ return -1;
+
+ q = section;
+ *q++ = tid;
+ put16(&q, 0xb000 | (len + 5 + 4)); /* 5 byte header + 4 byte CRC */
+ put16(&q, id);
+ *q++ = 0xc1 | (version << 1); /* current_next_indicator = 1 */
+ *q++ = sec_num;
+ *q++ = last_sec_num;
+ memcpy(q, buf, len);
+
+ mpegts_write_section(s, section, tot_len);
+ return 0;
+}
+
+/*********************************************/
+/* mpegts writer */
+
+#define DEFAULT_PMT_START_PID 0x1000
+#define DEFAULT_START_PID 0x0100
+#define DEFAULT_PROVIDER_NAME "FFmpeg"
+#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
+
+/* we retransmit the SI info at this rate */
+#define SDT_RETRANS_TIME 500
+#define PAT_RETRANS_TIME 100
+
+typedef struct MpegTSWriteStream {
+ int pid; /* stream associated pid */
+ int cc;
+ int packet_index;
+ int pes_packet_count;
+ uint8_t packet[TS_PACKET_SIZE];
+} MpegTSWriteStream;
+
+typedef struct MpegTSService {
+ MpegTSSection pmt; /* MPEG2 pmt table context */
+ int pcr_pid;
+ int sid; /* service ID */
+ char *name;
+ char *provider_name;
+} 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;
+ MpegTSService *service;
+ uint8_t data[1012], *q;
+ int i;
+
+ q = data;
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ put16(&q, service->sid);
+ put16(&q, 0xe000 | service->pmt.pid);
+ }
+ mpegts_write_section1(&ts->pat, PAT_TID, ts->tsid, 0, 0, 0,
+ data, q - data);
+}
+
+static void mpegts_write_pmt(AVFormatContext *s, MpegTSService *service)
+{
+ // MpegTSWrite *ts = s->priv_data;
+ uint8_t data[1012], *q, *desc_length_ptr, *program_info_length_ptr;
+ int val, stream_type, i;
+
+ q = data;
+ put16(&q, 0xe000 | service->pcr_pid);
+
+ program_info_length_ptr = q;
+ q += 2; /* patched after */
+
+ /* put program info here */
+
+ val = 0xf000 | (q - program_info_length_ptr - 2);
+ program_info_length_ptr[0] = val >> 8;
+ program_info_length_ptr[1] = val;
+
+ for(i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ MpegTSWriteStream *ts_st = st->priv_data;
+ switch(st->codec.codec_type) {
+ case CODEC_TYPE_VIDEO:
+ stream_type = STREAM_TYPE_VIDEO;
+ break;
+ case CODEC_TYPE_AUDIO:
+ stream_type = STREAM_TYPE_AUDIO;
+ break;
+ default:
+ stream_type = STREAM_TYPE_PRIVATE_DATA;
+ break;
+ }
+ *q++ = stream_type;
+ put16(&q, 0xe000 | ts_st->pid);
+ desc_length_ptr = q;
+ q += 2; /* patched after */
+
+ /* write optional descriptors here */
+
+ val = 0xf000 | (q - desc_length_ptr - 2);
+ desc_length_ptr[0] = val >> 8;
+ desc_length_ptr[1] = val;
+ }
+ mpegts_write_section1(&service->pmt, PMT_TID, service->sid, 0, 0, 0,
+ data, q - data);
+}
+
+/* NOTE: str == NULL is accepted for an empty string */
+static void putstr8(uint8_t **q_ptr, const char *str)
+{
+ uint8_t *q;
+ int len;
+
+ q = *q_ptr;
+ if (!str)
+ len = 0;
+ else
+ len = strlen(str);
+ *q++ = len;
+ memcpy(q, str, len);
+ q += len;
+ *q_ptr = q;
+}
+
+static void mpegts_write_sdt(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSService *service;
+ uint8_t data[1012], *q, *desc_list_len_ptr, *desc_len_ptr;
+ int i, running_status, free_ca_mode, val;
+
+ q = data;
+ put16(&q, ts->onid);
+ *q++ = 0xff;
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ put16(&q, service->sid);
+ *q++ = 0xfc | 0x00; /* currently no EIT info */
+ desc_list_len_ptr = q;
+ q += 2;
+ running_status = 4; /* running */
+ free_ca_mode = 0;
+
+ /* write only one descriptor for the service name and provider */
+ *q++ = 0x48;
+ desc_len_ptr = q;
+ q++;
+ *q++ = 0x01; /* digital television service */
+ putstr8(&q, service->provider_name);
+ putstr8(&q, service->name);
+ desc_len_ptr[0] = q - desc_len_ptr - 1;
+
+ /* fill descriptor length */
+ val = (running_status << 13) | (free_ca_mode << 12) |
+ (q - desc_list_len_ptr - 2);
+ desc_list_len_ptr[0] = val >> 8;
+ desc_list_len_ptr[1] = val;
+ }
+ mpegts_write_section1(&ts->sdt, SDT_TID, ts->tsid, 0, 0, 0,
+ data, q - data);
+}
+
+static MpegTSService *mpegts_add_service(MpegTSWrite *ts,
+ int sid,
+ const char *provider_name,
+ const char *name)
+{
+ MpegTSService *service;
+
+ service = av_mallocz(sizeof(MpegTSService));
+ if (!service)
+ return NULL;
+ service->pmt.pid = DEFAULT_PMT_START_PID + ts->nb_services - 1;
+ service->sid = sid;
+ service->provider_name = av_strdup(provider_name);
+ service->name = av_strdup(name);
+ service->pcr_pid = 0x1fff;
+ dynarray_add(&ts->services, &ts->nb_services, service);
+ return service;
+}
+
+static void section_write_packet(MpegTSSection *s, const uint8_t *packet)
+{
+ AVFormatContext *ctx = s->opaque;
+ put_buffer(&ctx->pb, packet, TS_PACKET_SIZE);
+}
+
+static int mpegts_write_header(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSWriteStream *ts_st;
+ MpegTSService *service;
+ AVStream *st;
+ int i, total_bit_rate;
+
+ ts->tsid = DEFAULT_TSID;
+ ts->onid = DEFAULT_ONID;
+ /* allocate a single DVB service */
+ service = mpegts_add_service(ts, DEFAULT_SID,
+ DEFAULT_PROVIDER_NAME, DEFAULT_SERVICE_NAME);
+ service->pmt.write_packet = section_write_packet;
+ service->pmt.opaque = s;
+
+ ts->pat.pid = PAT_PID;
+ ts->pat.cc = 0;
+ ts->pat.write_packet = section_write_packet;
+ ts->pat.opaque = s;
+
+ ts->sdt.pid = SDT_PID;
+ ts->sdt.cc = 0;
+ ts->sdt.write_packet = section_write_packet;
+ ts->sdt.opaque = s;
+
+ /* assign pids to each stream */
+ total_bit_rate = 0;
+ for(i = 0;i < s->nb_streams; i++) {
+ st = s->streams[i];
+ ts_st = av_mallocz(sizeof(MpegTSWriteStream));
+ if (!ts_st)
+ goto fail;
+ st->priv_data = ts_st;
+ ts_st->pid = DEFAULT_START_PID + i;
+ /* update PCR pid if needed */
+ 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;
+ }
+ if (total_bit_rate <= 8 * 1024)
+ total_bit_rate = 8 * 1024;
+ ts->sdt_packet_freq = (total_bit_rate * SDT_RETRANS_TIME) /
+ (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
+
+ /* write info at the start of the file, so that it will be fast to
+ find them */
+ mpegts_write_sdt(s);
+ mpegts_write_pat(s);
+ for(i = 0; i < ts->nb_services; i++) {
+ mpegts_write_pmt(s, ts->services[i]);
+ }
+ put_flush_packet(&s->pb);
+
+ return 0;
+
+ fail:
+ for(i = 0;i < s->nb_streams; i++) {
+ st = s->streams[i];
+ av_free(st->priv_data);
+ }
+ return -1;
+}
+
+/* send SDT, PAT and PMT tables regulary */
+static void retransmit_si_info(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ int i;
+
+ if (++ts->sdt_packet_count == ts->sdt_packet_freq) {
+ ts->sdt_packet_count = 0;
+ mpegts_write_sdt(s);
+ }
+ if (++ts->pat_packet_count == ts->pat_packet_freq) {
+ ts->pat_packet_count = 0;
+ mpegts_write_pat(s);
+ for(i = 0; i < ts->nb_services; i++) {
+ mpegts_write_pmt(s, ts->services[i]);
+ }
+ }
+}
+
+static int mpegts_write_packet(AVFormatContext *s, int stream_index,
+ uint8_t *buf, int size, int pts1)
+{
+ AVStream *st = s->streams[stream_index];
+ MpegTSWriteStream *ts_st = st->priv_data;
+ uint8_t *q;
+ int val, write_pts, is_start, len;
+ int64_t pts;
+
+ while (size > 0) {
+ if (ts_st->packet_index == 0) {
+ retransmit_si_info(s);
+
+ /* new PES header ? */
+ is_start = 0;
+ if (++ts_st->pes_packet_count == DEFAULT_PES_HEADER_FREQ) {
+ ts_st->pes_packet_count = 0;
+ is_start = 1;
+ }
+ /* prepare packet header */
+ q = ts_st->packet;
+ *q++ = 0x47;
+ val = (ts_st->pid >> 8);
+ if (is_start)
+ val |= 0x40;
+ *q++ = val;
+ *q++ = ts_st->pid;
+ *q++ = 0x10 | ts_st->cc;
+ ts_st->cc = (ts_st->cc + 1) & 0xf;
+ if (is_start) {
+ /* write PES header */
+ *q++ = 0x00;
+ *q++ = 0x00;
+ *q++ = 0x01;
+ if (st->codec.codec_type == CODEC_TYPE_VIDEO)
+ *q++ = 0xe0;
+ else
+ *q++ = 0xc0;
+ *q++ = 0; /* unbounded size */
+ *q++ = 0;
+ *q++ = 0x80;
+ write_pts = 0; /* XXX: enable it */
+ if (write_pts) {
+ *q++ = 0x80; /* PTS only */
+ *q++ = 0x05; /* header len */
+ pts = pts1;
+ 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;
+ }
+ }
+ ts_st->packet_index = q - ts_st->packet;
+ }
+ len = TS_PACKET_SIZE - ts_st->packet_index;
+ if (len == 0) {
+ put_buffer(&s->pb, ts_st->packet, TS_PACKET_SIZE);
+ ts_st->packet_index = 0;
+ } else {
+ if (len > size)
+ len = size;
+ memcpy(ts_st->packet + ts_st->packet_index, buf, len);
+ size -= len;
+ buf += len;
+ ts_st->packet_index += len;
+ }
+ }
+ put_flush_packet(&s->pb);
+ return 0;
+}
+
+static int mpegts_write_end(AVFormatContext *s)
+{
+ MpegTSWrite *ts = s->priv_data;
+ MpegTSWriteStream *ts_st;
+ MpegTSService *service;
+ AVStream *st;
+ int i;
+
+ /* flush current packets */
+ for(i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ ts_st = st->priv_data;
+ if (ts_st->packet_index != 0) {
+ /* put a known value at the end */
+ memset(ts_st->packet + ts_st->packet_index, 0xff,
+ TS_PACKET_SIZE - ts_st->packet_index);
+ put_buffer(&s->pb, ts_st->packet, TS_PACKET_SIZE);
+ }
+ }
+ put_flush_packet(&s->pb);
+
+ for(i = 0; i < ts->nb_services; i++) {
+ service = ts->services[i];
+ av_freep(&service->provider_name);
+ av_freep(&service->name);
+ av_free(service);
+ }
+ av_free(ts->services);
+
+ for(i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ av_free(st->priv_data);
+ }
+ return 0;
+}
+
+AVOutputFormat mpegts_mux = {
+ "mpegts",
+ "MPEG2 transport stream format",
+ "video/x-mpegts",
+ "ts",
+ sizeof(MpegTSWrite),
+ CODEC_ID_MP2,
+ CODEC_ID_MPEG1VIDEO,
+ mpegts_write_header,
+ mpegts_write_packet,
+ mpegts_write_end,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 14:59:18 +0000