* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/crc.h"
#include "avformat.h"
-#include "crc.h"
#include "mpegts.h"
//#define DEBUG_SI
/* maximum size in which we look for synchronisation if
synchronisation is lost */
#define MAX_RESYNC_SIZE 4096
+#define REGISTRATION_DESCRIPTOR 5
typedef struct PESContext PESContext;
static PESContext* add_pes_stream(MpegTSContext *ts, int pid, int pcr_pid, int stream_type);
static AVStream* new_pes_av_stream(PESContext *pes, uint32_t code);
extern void av_set_program_name(AVProgram *program, char *provider_name, char *name);
+extern void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
enum MpegTSFilterType {
MPEGTS_PES,
int section_index;
int section_h_size;
uint8_t *section_buf;
- int check_crc:1;
- int end_of_section_reached:1;
+ unsigned int check_crc:1;
+ unsigned int end_of_section_reached:1;
SectionCallback *section_cb;
void *opaque;
} MpegTSSectionFilter;
} u;
};
+#define MAX_PIDS_PER_PROGRAM 64
+typedef struct {
+ unsigned int id; //program id/service id
+ unsigned int nb_pids;
+ unsigned int pids[MAX_PIDS_PER_PROGRAM];
+} Program_t;
+
struct MpegTSContext {
/* user data */
AVFormatContext *stream;
/** raw packet size, including FEC if present */
int raw_packet_size;
+
+ int pos47;
+
/** if true, all pids are analyzed to find streams */
int auto_guess;
/******************************************/
/* private mpegts data */
/* scan context */
+ /** structure to keep track of Program->pids mapping */
+ unsigned int nb_prg;
+ Program_t *prg;
/** filters for various streams specified by PMT + for the PAT and PMT */
extern AVInputFormat mpegts_demuxer;
+static void clear_program(MpegTSContext *ts, unsigned int programid)
+{
+ int i;
+
+ for(i=0; i<ts->nb_prg; i++)
+ if(ts->prg[i].id == programid)
+ ts->prg[i].nb_pids = 0;
+}
+
+static void clear_programs(MpegTSContext *ts)
+{
+ av_freep(&ts->prg);
+ ts->nb_prg=0;
+}
+
+static void add_pat_entry(MpegTSContext *ts, unsigned int programid)
+{
+ Program_t *p;
+ void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(Program_t));
+ if(!tmp)
+ return;
+ ts->prg = tmp;
+ p = &ts->prg[ts->nb_prg];
+ p->id = programid;
+ p->nb_pids = 0;
+ ts->nb_prg++;
+}
+
+static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
+{
+ int i;
+ Program_t *p = NULL;
+ for(i=0; i<ts->nb_prg; i++) {
+ if(ts->prg[i].id == programid) {
+ p = &ts->prg[i];
+ break;
+ }
+ }
+ if(!p)
+ return;
+
+ if(p->nb_pids >= MAX_PIDS_PER_PROGRAM)
+ return;
+ p->pids[p->nb_pids++] = pid;
+}
+
+/**
+ * \brief discard_pid() decides if the pid is to be discarded according
+ * to caller's programs selection
+ * \param ts : - TS context
+ * \param pid : - pid
+ * \return 1 if the pid is only comprised in programs that have .discard=AVDISCARD_ALL
+ * 0 otherwise
+ */
+static int discard_pid(MpegTSContext *ts, unsigned int pid)
+{
+ int i, j, k;
+ int used = 0, discarded = 0;
+ Program_t *p;
+ for(i=0; i<ts->nb_prg; i++) {
+ p = &ts->prg[i];
+ for(j=0; j<p->nb_pids; j++) {
+ if(p->pids[j] != pid)
+ continue;
+ //is program with id p->id set to be discarded?
+ for(k=0; k<ts->stream->nb_programs; k++) {
+ if(ts->stream->programs[k]->id == p->id) {
+ if(ts->stream->programs[k]->discard == AVDISCARD_ALL)
+ discarded++;
+ else
+ used++;
+ }
+ }
+ }
+ }
+
+ return !used && discarded;
+}
+
/**
* Assembles PES packets out of TS packets, and then calls the "section_cb"
* function when they are complete.
if (tss->section_h_size != -1 && tss->section_index >= tss->section_h_size) {
tss->end_of_section_reached = 1;
if (!tss->check_crc ||
- av_crc(av_crc04C11DB7, -1, tss->section_buf, tss->section_h_size) == 0)
+ av_crc(av_crc_get_table(AV_CRC_32_IEEE), -1,
+ tss->section_buf, tss->section_h_size) == 0)
tss->section_cb(tss1, tss->section_buf, tss->section_h_size);
}
}
pid = filter->pid;
if (filter->type == MPEGTS_SECTION)
av_freep(&filter->u.section_filter.section_buf);
- else if (filter->type == MPEGTS_PES)
- av_freep(&filter->u.pes_filter.opaque);
av_free(filter);
ts->pids[pid] = NULL;
memset(stat, 0, packet_size*sizeof(int));
- for(x=i=0; i<size; i++){
- if(buf[i] == 0x47){
+ for(x=i=0; i<size-3; i++){
+ if(buf[i] == 0x47 && !(buf[i+1] & 0x80) && (buf[i+3] & 0x30)){
stat[x]++;
if(stat[x] > best_score){
best_score= stat[x];
int desc_list_len, desc_len, desc_tag;
int comp_page = 0, anc_page = 0; /* initialize to kill warnings */
char language[4] = {0}; /* initialize to kill warnings */
+ int has_hdmv_descr = 0;
#ifdef DEBUG_SI
av_log(ts->stream, AV_LOG_DEBUG, "PMT: len %i\n", section_len);
if (h->tid != PMT_TID)
return;
+ clear_program(ts, h->id);
pcr_pid = get16(&p, p_end) & 0x1fff;
if (pcr_pid < 0)
return;
+ add_pid_to_pmt(ts, h->id, pcr_pid);
#ifdef DEBUG_SI
av_log(ts->stream, AV_LOG_DEBUG, "pcr_pid=0x%x\n", pcr_pid);
#endif
program_info_length = get16(&p, p_end) & 0xfff;
if (program_info_length < 0)
return;
+ while(program_info_length >= 2) {
+ uint8_t tag, len;
+ tag = get8(&p, p_end);
+ len = get8(&p, p_end);
+ if(len > program_info_length - 2)
+ //something else is broken, exit the program_descriptors_loop
+ break;
+ program_info_length -= len + 2;
+ if(tag == REGISTRATION_DESCRIPTOR && len >= 4) {
+ uint8_t bytes[4];
+ bytes[0] = get8(&p, p_end);
+ bytes[1] = get8(&p, p_end);
+ bytes[2] = get8(&p, p_end);
+ bytes[3] = get8(&p, p_end);
+ len -= 4;
+ if(bytes[0] == 'H' && bytes[1] == 'D' &&
+ bytes[2] == 'M' && bytes[3] == 'V')
+ has_hdmv_descr = 1;
+ }
+ p += len;
+ }
p += program_info_length;
if (p >= p_end)
return;
case STREAM_TYPE_AUDIO_AAC:
case STREAM_TYPE_AUDIO_AC3:
case STREAM_TYPE_AUDIO_DTS:
+ case STREAM_TYPE_AUDIO_HDMV_DTS:
case STREAM_TYPE_SUBTITLE_DVB:
- if(ts->pids[pid]){
- assert(ts->pids[pid]->type == MPEGTS_PES);
+ if(stream_type == STREAM_TYPE_AUDIO_HDMV_DTS && !has_hdmv_descr)
+ break;
+ if(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES){
pes= ts->pids[pid]->u.pes_filter.opaque;
st= pes->st;
}else{
+ if (ts->pids[pid]) mpegts_close_filter(ts, ts->pids[pid]); //wrongly added sdt filter probably
pes = add_pes_stream(ts, pid, pcr_pid, stream_type);
if (pes)
st = new_pes_av_stream(pes, 0);
}
+ add_pid_to_pmt(ts, h->id, pid);
+ if(st)
+ av_program_add_stream_index(ts->stream, h->id, st->index);
break;
default:
/* we ignore the other streams */
if (h->tid != PAT_TID)
return;
+ clear_programs(ts);
for(;;) {
sid = get16(&p, p_end);
if (sid < 0)
av_new_program(ts->stream, sid);
ts->stop_parse--;
mpegts_open_section_filter(ts, pmt_pid, pmt_cb, ts, 1);
+ add_pat_entry(ts, sid);
+ add_pid_to_pmt(ts, sid, 0); //add pat pid to program
+ add_pid_to_pmt(ts, sid, pmt_pid);
}
}
/* not found */
if(program)
av_set_program_name(program, provider_name, name);
}
+ av_free(name);
+ av_free(provider_name);
break;
default:
break;
codec_id = CODEC_ID_AC3;
break;
case STREAM_TYPE_AUDIO_DTS:
+ case STREAM_TYPE_AUDIO_HDMV_DTS:
codec_type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_DTS;
break;
codec_id = CODEC_ID_AC3;
} else {
codec_type = CODEC_TYPE_VIDEO;
- codec_id = CODEC_ID_MPEG1VIDEO;
+ codec_id = CODEC_ID_PROBE;
}
break;
}
const uint8_t *p, *p_end;
pid = AV_RB16(packet + 1) & 0x1fff;
+ if(pid && discard_pid(ts, pid))
+ return;
is_start = packet[1] & 0x40;
tss = ts->pids[pid];
if (ts->auto_guess && tss == NULL && is_start) {
if (p >= p_end)
return;
+ ts->pos47= url_ftell(ts->stream->pb) % ts->raw_packet_size;
+
if (tss->type == MPEGTS_SECTION) {
if (is_start) {
/* pointer field present */
static int handle_packets(MpegTSContext *ts, int nb_packets)
{
AVFormatContext *s = ts->stream;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
uint8_t packet[TS_PACKET_SIZE];
int packet_num, ret;
AVFormatParameters *ap)
{
MpegTSContext *ts = s->priv_data;
- ByteIOContext *pb = &s->pb;
+ ByteIOContext *pb = s->pb;
uint8_t buf[1024];
int len;
int64_t pos;
nb_pcrs = 0;
nb_packets = 0;
for(;;) {
- ret = read_packet(&s->pb, packet, ts->raw_packet_size);
+ ret = read_packet(s->pb, packet, ts->raw_packet_size);
if (ret < 0)
return -1;
pid = AV_RB16(packet + 1) & 0x1fff;
if (av_new_packet(pkt, TS_PACKET_SIZE) < 0)
return AVERROR(ENOMEM);
- pkt->pos= url_ftell(&s->pb);
- ret = read_packet(&s->pb, pkt->data, ts->raw_packet_size);
+ pkt->pos= url_ftell(s->pb);
+ ret = read_packet(s->pb, pkt->data, ts->raw_packet_size);
if (ret < 0) {
av_free_packet(pkt);
return ret;
/* compute exact PCR for each packet */
if (parse_pcr(&pcr_h, &pcr_l, pkt->data) == 0) {
/* we read the next PCR (XXX: optimize it by using a bigger buffer */
- pos = url_ftell(&s->pb);
+ pos = url_ftell(s->pb);
for(i = 0; i < MAX_PACKET_READAHEAD; i++) {
- url_fseek(&s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
- get_buffer(&s->pb, pcr_buf, 12);
+ url_fseek(s->pb, pos + i * ts->raw_packet_size, SEEK_SET);
+ get_buffer(s->pb, pcr_buf, 12);
if (parse_pcr(&next_pcr_h, &next_pcr_l, pcr_buf) == 0) {
/* XXX: not precise enough */
ts->pcr_incr = ((next_pcr_h - pcr_h) * 300 + (next_pcr_l - pcr_l)) /
break;
}
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(s->pb, pos, SEEK_SET);
/* no next PCR found: we use previous increment */
ts->cur_pcr = pcr_h * 300 + pcr_l;
}
{
MpegTSContext *ts = s->priv_data;
int i;
+
+ clear_programs(ts);
+
for(i=0;i<NB_PID_MAX;i++)
if (ts->pids[i]) mpegts_close_filter(ts, ts->pids[i]);
uint8_t buf[TS_PACKET_SIZE];
int pcr_l, pcr_pid = ((PESContext*)s->streams[stream_index]->priv_data)->pcr_pid;
const int find_next= 1;
- pos = ((*ppos + ts->raw_packet_size - 1) / ts->raw_packet_size) * ts->raw_packet_size;
+ pos = ((*ppos + ts->raw_packet_size - 1 - ts->pos47) / ts->raw_packet_size) * ts->raw_packet_size + ts->pos47;
if (find_next) {
for(;;) {
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
pos -= ts->raw_packet_size;
if (pos < 0)
return AV_NOPTS_VALUE;
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return AV_NOPTS_VALUE;
if ((pcr_pid < 0 || (AV_RB16(buf + 1) & 0x1fff) == pcr_pid) &&
parse_pcr(×tamp, &pcr_l, buf) == 0) {
if(av_seek_frame_binary(s, stream_index, target_ts, flags) < 0)
return -1;
- pos= url_ftell(&s->pb);
+ pos= url_ftell(s->pb);
for(;;) {
- url_fseek(&s->pb, pos, SEEK_SET);
- if (get_buffer(&s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
+ url_fseek(s->pb, pos, SEEK_SET);
+ if (get_buffer(s->pb, buf, TS_PACKET_SIZE) != TS_PACKET_SIZE)
return -1;
// pid = AV_RB16(buf + 1) & 0x1fff;
if(buf[1] & 0x40) break;
pos += ts->raw_packet_size;
}
- url_fseek(&s->pb, pos, SEEK_SET);
+ url_fseek(s->pb, pos, SEEK_SET);
return 0;
}
AVInputFormat mpegts_demuxer = {
"mpegts",
- "MPEG2 transport stream format",
+ NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
sizeof(MpegTSContext),
mpegts_probe,
mpegts_read_header,
AVInputFormat mpegtsraw_demuxer = {
"mpegtsraw",
- "MPEG2 raw transport stream format",
+ NULL_IF_CONFIG_SMALL("MPEG-2 raw transport stream format"),
sizeof(MpegTSContext),
- mpegts_probe,
+ NULL,
mpegts_read_header,
mpegts_raw_read_packet,
mpegts_read_close,