mpeg ts demux uses DVB SI info and generates correct PTS info - added prototype mpeg ts mux

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@1956 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

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
 

libavformat/mpegts.c

 /*
  * 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;
 }

libavformat/mpegts.h

+/*
+ * 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;

libavformat/mpegtsenc.c

+/*
+ * 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,
+};