/*
* MPEG2 transport stream (aka DVB) demuxer
- * Copyright (c) 2002-2003 Fabrice Bellard.
+ * Copyright (c) 2002-2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* 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 "libavutil/intreadwrite.h"
+#include "libavcodec/bytestream.h"
#include "avformat.h"
-#include "crc.h"
#include "mpegts.h"
+#include "internal.h"
-//#define DEBUG_SI
+//#define DEBUG
//#define DEBUG_SEEK
/* 1.0 second at 24Mbit/s */
/* 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,
typedef struct MpegTSFilter MpegTSFilter;
-typedef void PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start);
+typedef void PESCallback(MpegTSFilter *f, const uint8_t *buf, int len, int is_start, int64_t pos);
typedef struct MpegTSPESFilter {
PESCallback *pes_cb;
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;
};
#define MAX_PIDS_PER_PROGRAM 64
-typedef struct {
+struct Program {
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;
/* scan context */
/** structure to keep track of Program->pids mapping */
unsigned int nb_prg;
- Program_t *prg;
+ struct Program *prg;
/** filters for various streams specified by PMT + for the PAT and PMT */
int total_size;
int pes_header_size;
int64_t pts, dts;
+ int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
uint8_t header[MAX_PES_HEADER_SIZE];
};
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));
+ struct Program *p;
+ void *tmp = av_realloc(ts->prg, (ts->nb_prg+1)*sizeof(struct Program));
if(!tmp)
return;
ts->prg = tmp;
static void add_pid_to_pmt(MpegTSContext *ts, unsigned int programid, unsigned int pid)
{
int i;
- Program_t *p = NULL;
+ struct Program *p = NULL;
for(i=0; i<ts->nb_prg; i++) {
if(ts->prg[i].id == programid) {
p = &ts->prg[i];
{
int i, j, k;
int used = 0, discarded = 0;
- Program_t *p;
+ struct Program *p;
for(i=0; i<ts->nb_prg; i++) {
p = &ts->prg[i];
for(j=0; j<p->nb_pids; j++) {
}
}
- return (!used && discarded);
+ return !used && discarded;
}
/**
MpegTSFilter *filter;
MpegTSSectionFilter *sec;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "Filter: pid=0x%x\n", pid);
-#endif
+ dprintf(ts->stream, "Filter: pid=0x%x\n", pid);
+
if (pid >= NB_PID_MAX || ts->pids[pid])
return NULL;
filter = av_mallocz(sizeof(MpegTSFilter));
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);
+ else if (filter->type == MPEGTS_PES) {
+ /* referenced private data will be freed later in
+ * av_close_input_stream */
+ if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
+ 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;
+ int has_dirac_descr = 0;
+ uint32_t reg_desc = 0; /* registration descriptor */
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "PMT: len %i\n", section_len);
+#ifdef DEBUG
+ dprintf(ts->stream, "PMT: len %i\n", section_len);
av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (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
- av_log(ts->stream, AV_LOG_DEBUG, "sid=0x%x sec_num=%d/%d\n",
+
+ dprintf(ts->stream, "sid=0x%x sec_num=%d/%d\n",
h->id, h->sec_num, h->last_sec_num);
-#endif
+
if (h->tid != PMT_TID)
return;
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
+
+ dprintf(ts->stream, "pcr_pid=0x%x\n", pcr_pid);
+
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) {
+ reg_desc = bytestream_get_le32(&p);
+ len -= 4;
+ if(reg_desc == AV_RL32("HDMV"))
+ has_hdmv_descr = 1;
+ }
+ p += len;
+ }
p += program_info_length;
if (p >= p_end)
return;
}
}
desc_len = get8(&p, desc_list_end);
+ if (desc_len < 0)
+ break;
desc_end = p + desc_len;
if (desc_end > desc_list_end)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tag: 0x%02x len=%d\n",
+
+ dprintf(ts->stream, "tag: 0x%02x len=%d\n",
desc_tag, desc_len);
-#endif
+
switch(desc_tag) {
case DVB_SUBT_DESCID:
if (stream_type == STREAM_TYPE_PRIVATE_DATA)
language[2] = get8(&p, desc_end);
language[3] = 0;
break;
+ case REGISTRATION_DESCRIPTOR: /*MPEG-2 Registration descriptor */
+ reg_desc = bytestream_get_le32(&p);
+ if(reg_desc == AV_RL32("drac"))
+ has_dirac_descr = 1;
+ else if(reg_desc == AV_RL32("AC-3"))
+ stream_type = STREAM_TYPE_AUDIO_AC3;
+ break;
default:
break;
}
}
p = desc_list_end;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "stream_type=%d pid=0x%x\n",
+ dprintf(ts->stream, "stream_type=%x pid=0x%x\n",
stream_type, pid);
-#endif
/* now create ffmpeg stream */
switch(stream_type) {
case STREAM_TYPE_VIDEO_MPEG4:
case STREAM_TYPE_VIDEO_H264:
case STREAM_TYPE_VIDEO_VC1:
+ case STREAM_TYPE_VIDEO_DIRAC:
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((stream_type == STREAM_TYPE_AUDIO_HDMV_DTS && !has_hdmv_descr)
+ || (stream_type == STREAM_TYPE_VIDEO_DIRAC && !has_dirac_descr))
+ break;
if(ts->pids[pid] && ts->pids[pid]->type == MPEGTS_PES){
pes= ts->pids[pid]->u.pes_filter.opaque;
st= pes->st;
if (st) {
if (language[0] != 0) {
- memcpy(st->language, language, 4);
+ av_metadata_set(&st->metadata, "language", language);
}
if (stream_type == STREAM_TYPE_SUBTITLE_DVB) {
const uint8_t *p, *p_end;
int sid, pmt_pid;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "PAT:\n");
+#ifdef DEBUG
+ dprintf(ts->stream, "PAT:\n");
av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
#endif
p_end = section + section_len - 4;
pmt_pid = get16(&p, p_end) & 0x1fff;
if (pmt_pid < 0)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
-#endif
+
+ dprintf(ts->stream, "sid=0x%x pid=0x%x\n", sid, pmt_pid);
+
if (sid == 0x0000) {
/* NIT info */
} else {
mpegts_close_filter(ts, filter);
}
-static void mpegts_set_service(MpegTSContext *ts)
-{
- mpegts_open_section_filter(ts, PAT_PID,
- pat_cb, ts, 1);
-}
-
static void sdt_cb(MpegTSFilter *filter, const uint8_t *section, int section_len)
{
MpegTSContext *ts = filter->u.section_filter.opaque;
int onid, val, sid, desc_list_len, desc_tag, desc_len, service_type;
char *name, *provider_name;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "SDT:\n");
+#ifdef DEBUG
+ dprintf(ts->stream, "SDT:\n");
av_hex_dump_log(ts->stream, AV_LOG_DEBUG, (uint8_t *)section, section_len);
#endif
desc_end = p + desc_len;
if (desc_end > desc_list_end)
break;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tag: 0x%02x len=%d\n",
+
+ dprintf(ts->stream, "tag: 0x%02x len=%d\n",
desc_tag, desc_len);
-#endif
+
switch(desc_tag) {
case 0x48:
service_type = get8(&p, p_end);
name = getstr8(&p, p_end);
if (name) {
AVProgram *program = av_new_program(ts->stream, sid);
- if(program)
- av_set_program_name(program, provider_name, name);
+ if(program) {
+ av_metadata_set(&program->metadata, "name", name);
+ av_metadata_set(&program->metadata, "provider_name", provider_name);
+ }
}
+ av_free(name);
+ av_free(provider_name);
break;
default:
break;
}
}
-/* scan services in a transport stream by looking at the SDT */
-static void mpegts_scan_sdt(MpegTSContext *ts)
-{
- mpegts_open_section_filter(ts, SDT_PID,
- sdt_cb, ts, 1);
-}
-
static int64_t get_pts(const uint8_t *p)
{
int64_t pts = (int64_t)((p[0] >> 1) & 0x07) << 30;
/* return non zero if a packet could be constructed */
static void mpegts_push_data(MpegTSFilter *filter,
- const uint8_t *buf, int buf_size, int is_start)
+ const uint8_t *buf, int buf_size, int is_start,
+ int64_t pos)
{
PESContext *pes = filter->u.pes_filter.opaque;
MpegTSContext *ts = pes->ts;
if (is_start) {
pes->state = MPEGTS_HEADER;
pes->data_index = 0;
+ pes->ts_packet_pos = pos;
}
p = buf;
while (buf_size > 0) {
pes->header[2] == 0x01) {
/* it must be an mpeg2 PES stream */
code = pes->header[3] | 0x100;
- if (!((code >= 0x1c0 && code <= 0x1df) ||
+ if (!pes->st ||
+ !((code >= 0x1c0 && code <= 0x1df) ||
(code >= 0x1e0 && code <= 0x1ef) ||
(code == 0x1bd) || (code == 0x1fd)))
goto skip;
- if (!pes->st) {
- /* allocate stream */
- new_pes_av_stream(pes, code);
- }
pes->state = MPEGTS_PESHEADER_FILL;
pes->total_size = AV_RB16(pes->header + 4);
/* NOTE: a zero total size means the PES size is
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
if ((flags & 0xc0) == 0x80) {
- pes->pts = get_pts(r);
+ pes->dts = pes->pts = get_pts(r);
r += 5;
} else if ((flags & 0xc0) == 0xc0) {
pes->pts = get_pts(r);
pkt->stream_index = pes->st->index;
pkt->pts = pes->pts;
pkt->dts = pes->dts;
+ /* store position of first TS packet of this PES packet */
+ pkt->pos = pes->ts_packet_pos;
/* reset pts values */
pes->pts = AV_NOPTS_VALUE;
pes->dts = AV_NOPTS_VALUE;
static AVStream* new_pes_av_stream(PESContext *pes, uint32_t code)
{
AVStream *st;
- int codec_type, codec_id;
+ enum CodecID codec_id;
+ enum CodecType codec_type;
switch(pes->stream_type){
case STREAM_TYPE_AUDIO_MPEG1:
codec_type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_VC1;
break;
+ case STREAM_TYPE_VIDEO_DIRAC:
+ codec_type = CODEC_TYPE_VIDEO;
+ codec_id = CODEC_ID_DIRAC;
+ break;
case STREAM_TYPE_AUDIO_AAC:
codec_type = CODEC_TYPE_AUDIO;
codec_id = CODEC_ID_AAC;
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;
}
MpegTSFilter *tss;
int len, pid, cc, cc_ok, afc, is_start;
const uint8_t *p, *p_end;
+ int64_t pos;
pid = AV_RB16(packet + 1) & 0x1fff;
if(pid && discard_pid(ts, pid))
if (p >= p_end)
return;
+ pos = url_ftell(ts->stream->pb);
+ ts->pos47= pos % ts->raw_packet_size;
+
if (tss->type == MPEGTS_SECTION) {
if (is_start) {
/* pointer field present */
}
}
} else {
+ // Note: The position here points actually behind the current packet.
tss->u.pes_filter.pes_cb(tss,
- p, p_end - p, is_start);
+ p, p_end - p, is_start, pos - ts->raw_packet_size);
}
}
#if 1
const int size= p->buf_size;
int score, fec_score, dvhs_score;
+ int check_count= size / TS_FEC_PACKET_SIZE;
#define CHECK_COUNT 10
- if (size < (TS_FEC_PACKET_SIZE * CHECK_COUNT))
+ if (check_count < CHECK_COUNT)
return -1;
- score = analyze(p->buf, TS_PACKET_SIZE *CHECK_COUNT, TS_PACKET_SIZE, NULL);
- dvhs_score = analyze(p->buf, TS_DVHS_PACKET_SIZE *CHECK_COUNT, TS_DVHS_PACKET_SIZE, NULL);
- fec_score= analyze(p->buf, TS_FEC_PACKET_SIZE*CHECK_COUNT, TS_FEC_PACKET_SIZE, NULL);
+ score = analyze(p->buf, TS_PACKET_SIZE *check_count, TS_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
+ dvhs_score= analyze(p->buf, TS_DVHS_PACKET_SIZE*check_count, TS_DVHS_PACKET_SIZE, NULL)*CHECK_COUNT/check_count;
+ fec_score = analyze(p->buf, TS_FEC_PACKET_SIZE *check_count, TS_FEC_PACKET_SIZE , NULL)*CHECK_COUNT/check_count;
// av_log(NULL, AV_LOG_DEBUG, "score: %d, dvhs_score: %d, fec_score: %d \n", score, dvhs_score, fec_score);
// we need a clear definition for the returned score otherwise things will become messy sooner or later
#endif
}
-/* return the 90 kHz PCR and the extension for the 27 MHz PCR. return
+/* return the 90kHz PCR and the extension for the 27MHz PCR. return
(-1) if not available */
static int parse_pcr(int64_t *ppcr_high, int *ppcr_low,
const uint8_t *packet)
{
MpegTSContext *ts = s->priv_data;
ByteIOContext *pb = s->pb;
- uint8_t buf[1024];
+ uint8_t buf[5*1024];
int len;
int64_t pos;
/* first do a scaning to get all the services */
url_fseek(pb, pos, SEEK_SET);
- mpegts_scan_sdt(ts);
- mpegts_set_service(ts);
+ mpegts_open_section_filter(ts, SDT_PID, sdt_cb, ts, 1);
+
+ mpegts_open_section_filter(ts, PAT_PID, pat_cb, ts, 1);
handle_packets(ts, s->probesize);
/* if could not find service, enable auto_guess */
ts->auto_guess = 1;
-#ifdef DEBUG_SI
- av_log(ts->stream, AV_LOG_DEBUG, "tuning done\n");
-#endif
+ dprintf(ts->stream, "tuning done\n");
+
s->ctx_flags |= AVFMTCTX_NOHEADER;
} else {
AVStream *st;
{
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);
AVInputFormat mpegts_demuxer = {
"mpegts",
- "MPEG2 transport stream format",
+ NULL_IF_CONFIG_SMALL("MPEG-2 transport stream format"),
sizeof(MpegTSContext),
mpegts_probe,
mpegts_read_header,
mpegts_read_close,
read_seek,
mpegts_get_pcr,
- .flags = AVFMT_SHOW_IDS,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
};
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,
read_seek,
mpegts_get_pcr,
- .flags = AVFMT_SHOW_IDS,
+ .flags = AVFMT_SHOW_IDS|AVFMT_TS_DISCONT,
};
projects / frescor / ffmpeg.git / blobdiff