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Commit cb5f74d6 authored by Naohiro KORIYAMA's avatar Naohiro KORIYAMA Committed by Laurent Aimar
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TS demux: Enhance TS demuxer to support duration and current time 

It closes #2985.
parent bd55fe88
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Showing with 425 additions and 91 deletions
modules/demux/ts.c
View file @ cb5f74d6
......@@ -138,6 +138,12 @@ static void Close ( vlc_object_t * );
"Separate teletex/dvbs pages into independent ES. " \
"It can be useful to turn off this option when using stream output." )
#define SEEK_PERCENT_TEXT N_("Seek based on percent not time")
#define SEEK_PERCENT_LONGTEXT N_( \
"Seek and position based on a percent byte position, not a PCR generated " \
"time position. If seeking doesn't work propery, turn on this option." )
vlc_module_begin ()
set_description( N_("MPEG Transport Stream demuxer") )
set_shortname ( "MPEG-TS" )
......@@ -165,6 +171,7 @@ vlc_module_begin ()
add_integer( "ts-dump-size", 16384, DUMPSIZE_TEXT,
DUMPSIZE_LONGTEXT, true )
add_bool( "ts-split-es", true, SPLIT_ES_TEXT, SPLIT_ES_LONGTEXT, false )
add_bool( "ts-seek-percent", false, SEEK_PERCENT_TEXT, SEEK_PERCENT_LONGTEXT, true )
set_capability( "demux", 10 )
set_callbacks( Open, Close )
......@@ -336,6 +343,16 @@ struct demux_sys_t
/* how many TS packet we read at once */
int i_ts_read;
/* to determine length and time */
int i_pid_ref_pcr;
mtime_t i_first_pcr;
mtime_t i_current_pcr;
mtime_t i_last_pcr;
bool b_force_seek_per_percent;
int i_pcrs_num;
mtime_t *p_pcrs;
int64_t *p_pos;
/* All pid */
ts_pid_t pid[8192];
......@@ -401,6 +418,13 @@ static inline int PIDGet( block_t *p )
static bool GatherPES( demux_t *p_demux, ts_pid_t *pid, block_t *p_bk );
static block_t* ReadTSPacket( demux_t *p_demux );
static mtime_t GetPCR( block_t *p_pkt );
static int SeekToPCR( demux_t *p_demux, int64_t i_pos );
static int Seek( demux_t *p_demux, double f_percent );
static void GetFirstPCR( demux_t *p_demux );
static void GetLastPCR( demux_t *p_demux );
static void CheckPCR( demux_t *p_demux );
static void PCRHandle( demux_t *p_demux, ts_pid_t *, block_t * );
static iod_descriptor_t *IODNew( int , uint8_t * );
......@@ -788,6 +812,28 @@ static int Open( vlc_object_t *p_this )
p_sys->b_silent = var_CreateGetBool( p_demux, "ts-silent" );
p_sys->b_split_es = var_InheritBool( p_demux, "ts-split-es" );
p_sys->i_pid_ref_pcr = -1;
p_sys->i_first_pcr = -1;
p_sys->i_current_pcr = -1;
p_sys->i_last_pcr = -1;
p_sys->b_force_seek_per_percent = var_InheritBool( p_demux, "ts-seek-percent" );
p_sys->i_pcrs_num = 10;
p_sys->p_pcrs = (mtime_t *)calloc( p_sys->i_pcrs_num, sizeof( mtime_t ) );
p_sys->p_pos = (int64_t *)calloc( p_sys->i_pcrs_num, sizeof( int64_t ) );
bool can_seek = false;
stream_Control( p_demux->s, STREAM_CAN_SEEK, &can_seek );
if( can_seek )
{
GetFirstPCR( p_demux );
CheckPCR( p_demux );
GetLastPCR( p_demux );
}
if( p_sys->i_first_pcr < 0 || p_sys->i_last_pcr < 0 )
{
p_sys->b_force_seek_per_percent = true;
}
while( !p_sys->b_file_out && p_sys->i_pmt_es <= 0 &&
vlc_object_alive( p_demux ) )
{
......@@ -885,6 +931,9 @@ static void Close( vlc_object_t *p_this )
free( p_sys->buffer );
free( p_sys->psz_file );
free( p_sys->p_pcrs );
free( p_sys->p_pos );
vlc_mutex_destroy( &p_sys->csa_lock );
free( p_sys );
}
......@@ -1026,59 +1075,11 @@ static int Demux( demux_t *p_demux )
{
bool b_frame = false;
block_t *p_pkt;
/* Get a new TS packet */
if( !( p_pkt = stream_Block( p_demux->s, p_sys->i_packet_size ) ) )
{
msg_Dbg( p_demux, "eof ?" );
return 0;
}
/* Check sync byte and re-sync if needed */
if( p_pkt->p_buffer[0] != 0x47 )
{
msg_Warn( p_demux, "lost synchro" );
block_Release( p_pkt );
while( vlc_object_alive (p_demux) )
if( !(p_pkt = ReadTSPacket( p_demux )) )
{
const uint8_t *p_peek;
int i_peek, i_skip = 0;
i_peek = stream_Peek( p_demux->s, &p_peek,
p_sys->i_packet_size * 10 );
if( i_peek < p_sys->i_packet_size + 1 )
{
msg_Dbg( p_demux, "eof ?" );
return 0;
}
while( i_skip < i_peek - p_sys->i_packet_size )
{
if( p_peek[i_skip] == 0x47 &&
p_peek[i_skip + p_sys->i_packet_size] == 0x47 )
{
break;
}
i_skip++;
}
msg_Dbg( p_demux, "skipping %d bytes of garbage", i_skip );
stream_Read( p_demux->s, NULL, i_skip );
if( i_skip < i_peek - p_sys->i_packet_size )
{
break;
}
}
if( !( p_pkt = stream_Block( p_demux->s, p_sys->i_packet_size ) ) )
{
msg_Dbg( p_demux, "eof ?" );
return 0;
}
}
if( p_sys->b_start_record )
{
/* Enable recording once synchronized */
......@@ -1196,64 +1197,83 @@ static int Control( demux_t *p_demux, int i_query, va_list args )
{
case DEMUX_GET_POSITION:
pf = (double*) va_arg( args, double* );
i64 = stream_Size( p_demux->s );
if( i64 > 0 )
{
double f_current = stream_Tell( p_demux->s );
*pf = f_current / (double)i64;
}
else
if( p_sys->b_force_seek_per_percent ||
(p_sys->b_dvb_meta && p_sys->b_access_control) ||
p_sys->i_first_pcr < 0 ||
p_sys->i_current_pcr - p_sys->i_first_pcr < 0 ||
p_sys->i_last_pcr - p_sys->i_first_pcr <= 0 )
{
int64_t i_time, i_length;
if( !DVBEventInformation( p_demux, &i_time, &i_length ) && i_length > 0 )
*pf = (double)i_time/(double)i_length;
else if( (i64 = stream_Size( p_demux->s) ) > 0 )
*pf = (double)stream_Tell( p_demux->s ) / (double)i64;
else
*pf = 0.0;
}
else
{
*pf = (double)(p_sys->i_current_pcr - p_sys->i_first_pcr) / (double)(p_sys->i_last_pcr - p_sys->i_first_pcr);
}
return VLC_SUCCESS;
case DEMUX_SET_POSITION:
f = (double) va_arg( args, double );
i64 = stream_Size( p_demux->s );
if( p_sys->b_force_seek_per_percent ||
(p_sys->b_dvb_meta && p_sys->b_access_control) ||
p_sys->i_first_pcr < 0 ||
p_sys->i_last_pcr - p_sys->i_first_pcr <= 0 )
{
i64 = stream_Size( p_demux->s );
if( stream_Seek( p_demux->s, (int64_t)(i64 * f) ) )
return VLC_EGENERIC;
return VLC_SUCCESS;
#if 0
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_time < 0 )
}
else
{
*pi64 = 0;
if( Seek( p_demux, f ) )
{
p_sys->b_force_seek_per_percent = true;
return VLC_EGENERIC;
}
*pi64 = p_sys->i_time;
}
return VLC_SUCCESS;
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( p_sys->i_mux_rate > 0 )
{
*pi64 = INT64_C(1000000) * ( stream_Size( p_demux->s ) / 50 ) /
p_sys->i_mux_rate;
return VLC_SUCCESS;
}
*pi64 = 0;
return VLC_EGENERIC;
#else
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( (p_sys->b_dvb_meta && p_sys->b_access_control) ||
p_sys->i_first_pcr < 0 ||
p_sys->i_current_pcr - p_sys->i_first_pcr < 0 )
{
if( DVBEventInformation( p_demux, pi64, NULL ) )
{
*pi64 = 0;
}
}
else
{
*pi64 = (p_sys->i_current_pcr - p_sys->i_first_pcr) * 100 / 9;
}
return VLC_SUCCESS;
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
if( (p_sys->b_dvb_meta && p_sys->b_access_control) ||
p_sys->i_first_pcr < 0 ||
p_sys->i_last_pcr - p_sys->i_first_pcr <= 0 )
{
if( DVBEventInformation( p_demux, NULL, pi64 ) )
{
*pi64 = 0;
}
}
else
{
*pi64 = (p_sys->i_last_pcr - p_sys->i_first_pcr) * 100 / 9;
}
return VLC_SUCCESS;
#endif
case DEMUX_SET_GROUP:
{
vlc_list_t *p_list;
......@@ -1847,24 +1867,338 @@ static void ParsePES( demux_t *p_demux, ts_pid_t *pid )
}
}
static void PCRHandle( demux_t *p_demux, ts_pid_t *pid, block_t *p_bk )
static block_t* ReadTSPacket( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
const uint8_t *p = p_bk->p_buffer;
if( p_sys->i_pmt_es <= 0 )
return;
block_t *p_pkt;
/* Get a new TS packet */
if( !( p_pkt = stream_Block( p_demux->s, p_sys->i_packet_size ) ) )
{
msg_Dbg( p_demux, "eof ?" );
return NULL;
}
/* Check sync byte and re-sync if needed */
if( p_pkt->p_buffer[0] != 0x47 )
{
msg_Warn( p_demux, "lost synchro" );
block_Release( p_pkt );
while( vlc_object_alive (p_demux) )
{
const uint8_t *p_peek;
int i_peek, i_skip = 0;
i_peek = stream_Peek( p_demux->s, &p_peek,
p_sys->i_packet_size * 10 );
if( i_peek < p_sys->i_packet_size + 1 )
{
msg_Dbg( p_demux, "eof ?" );
return NULL;
}
while( i_skip < i_peek - p_sys->i_packet_size )
{
if( p_peek[i_skip] == 0x47 &&
p_peek[i_skip + p_sys->i_packet_size] == 0x47 )
{
break;
}
i_skip++;
}
msg_Dbg( p_demux, "skipping %d bytes of garbage", i_skip );
stream_Read( p_demux->s, NULL, i_skip );
if( i_skip < i_peek - p_sys->i_packet_size )
{
break;
}
}
if( !( p_pkt = stream_Block( p_demux->s, p_sys->i_packet_size ) ) )
{
msg_Dbg( p_demux, "eof ?" );
return NULL;
}
}
return p_pkt;
}
static mtime_t AdjustPCRWrapAround( demux_t *p_demux, mtime_t i_pcr )
{
demux_sys_t *p_sys = p_demux->p_sys;
/*
* PCR is 33bit. If PCR reaches to 0x1FFFFFFFF (26:30:43.717), ressets from 0.
* So, need to add 0x1FFFFFFFF, for calculating duration or current position.
*/
mtime_t i_adjust = 0;
int64_t i_pos = stream_Tell( p_demux->s );
int i;
for( i = 1; i < p_sys->i_pcrs_num && p_sys->p_pos[i] <= i_pos; ++i )
{
if( p_sys->p_pcrs[i-1] > p_sys->p_pcrs[i] )
i_adjust += 0x1FFFFFFFF;
}
if( p_sys->p_pcrs[i-1] > i_pcr )
i_adjust += 0x1FFFFFFFF;
return i_pcr + i_adjust;
}
static mtime_t GetPCR( block_t *p_pkt )
{
const uint8_t *p = p_pkt->p_buffer;
mtime_t i_pcr = -1;
if( ( p[3]&0x20 ) && /* adaptation */
( p[5]&0x10 ) &&
( p[4] >= 7 ) )
{
/* PCR is 33 bits */
const mtime_t i_pcr = ( (mtime_t)p[6] << 25 ) |
i_pcr = ( (mtime_t)p[6] << 25 ) |
( (mtime_t)p[7] << 17 ) |
( (mtime_t)p[8] << 9 ) |
( (mtime_t)p[9] << 1 ) |
( (mtime_t)p[10] >> 7 );
}
return i_pcr;
}
static int SeekToPCR( demux_t *p_demux, int64_t i_pos )
{
demux_sys_t *p_sys = p_demux->p_sys;
mtime_t i_pcr = -1;
int64_t i_initial_pos = stream_Tell( p_demux->s );
if( i_pos < 0 )
return VLC_EGENERIC;
int64_t i_last_pos = i_pos + p_sys->i_packet_size * 4500; //XXX
if( i_last_pos > stream_Size( p_demux->s ) - p_sys->i_packet_size )
{
i_last_pos = stream_Size( p_demux->s ) - p_sys->i_packet_size;
}
if( stream_Seek( p_demux->s, i_pos ) )
return VLC_EGENERIC;
while( vlc_object_alive( p_demux ) )
{
block_t *p_pkt;
if( !( p_pkt = ReadTSPacket( p_demux ) ) )
{
break;
}
if( PIDGet( p_pkt ) == p_sys->i_pid_ref_pcr )
{
i_pcr = GetPCR( p_pkt );
}
block_Release( p_pkt );
if( i_pcr >= 0 )
break;
if( stream_Tell( p_demux->s ) >= i_last_pos )
break;
}
if( i_pcr < 0 )
{
stream_Seek( p_demux->s, i_initial_pos );
return VLC_EGENERIC;
}
else
{
p_sys->i_current_pcr = i_pcr;
return VLC_SUCCESS;
}
}
static int Seek( demux_t *p_demux, double f_percent )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_initial_pos = stream_Tell( p_demux->s );
mtime_t i_initial_pcr = p_sys->i_current_pcr;
/*
* Find the time position by using binary search algorithm.
*/
mtime_t i_target_pcr = (p_sys->i_last_pcr - p_sys->i_first_pcr) * f_percent + p_sys->i_first_pcr;
int64_t i_head_pos = 0;
int64_t i_tail_pos = stream_Size( p_demux->s );
{
mtime_t i_adjust = 0;
int i;
for( i = 1; i < p_sys->i_pcrs_num; ++i )
{
if( p_sys->p_pcrs[i-1] > p_sys->p_pcrs[i] )
i_adjust += 0x1FFFFFFFF;
if( p_sys->p_pcrs[i] + i_adjust > i_target_pcr )
break;
}
i_head_pos = p_sys->p_pos[i-1];
i_tail_pos = ( i < p_sys->i_pcrs_num ) ? p_sys->p_pos[i] : stream_Size( p_demux->s );
}
msg_Dbg( p_demux, "Seek():i_head_pos:%lld, i_tail_pos:%lld", i_head_pos, i_tail_pos);
bool b_found = false;
int i_cnt = 0;
while( i_head_pos <= i_tail_pos )
{
int64_t i_pos = i_head_pos + (i_tail_pos - i_head_pos) / 2;
if( SeekToPCR( p_demux, i_pos ) )
break;
p_sys->i_current_pcr = AdjustPCRWrapAround( p_demux, p_sys->i_current_pcr );
int64_t i_diff_msec = (p_sys->i_current_pcr - i_target_pcr) * 100 / 9 / 1000;
if( i_diff_msec > 500 )
{
i_tail_pos = i_pos - p_sys->i_packet_size;
}
else if( i_diff_msec < -500 )
{
i_head_pos = i_pos + p_sys->i_packet_size;
}
else
{
// diff time <= 500msec
b_found = true;
break;
}
++i_cnt;
}
if( !b_found )
{
msg_Dbg( p_demux, "Seek():cannot find a time position. i_cnt:%d", i_cnt );
stream_Seek( p_demux->s, i_initial_pos );
p_sys->i_current_pcr = i_initial_pcr;
return VLC_EGENERIC;
}
else
{
msg_Dbg( p_demux, "Seek():can find a time position. i_cnt:%d", i_cnt );
return VLC_SUCCESS;
}
}
static void GetFirstPCR( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_initial_pos = stream_Tell( p_demux->s );
if( stream_Seek( p_demux->s, 0 ) )
return;
while( vlc_object_alive (p_demux) )
{
block_t *p_pkt;
if( !( p_pkt = ReadTSPacket( p_demux ) ) )
{
break;
}
mtime_t i_pcr = GetPCR( p_pkt );
if( i_pcr >= 0 )
{
p_sys->i_pid_ref_pcr = PIDGet( p_pkt );
p_sys->i_first_pcr = i_pcr;
p_sys->i_current_pcr = i_pcr;
}
block_Release( p_pkt );
if( p_sys->i_first_pcr >= 0 )
break;
}
stream_Seek( p_demux->s, i_initial_pos );
}
static void GetLastPCR( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_initial_pos = stream_Tell( p_demux->s );
mtime_t i_initial_pcr = p_sys->i_current_pcr;
int64_t i_last_pos = stream_Size( p_demux->s ) - p_sys->i_packet_size;
int64_t i_pos = i_last_pos - p_sys->i_packet_size * 4500; /* FIXME if the value is not reasonable, please change it. */
if( i_pos < 0 )
return;
while( vlc_object_alive( p_demux ) )
{
if( SeekToPCR( p_demux, i_pos ) )
break;
p_sys->i_last_pcr = AdjustPCRWrapAround( p_demux, p_sys->i_current_pcr );
if( ( i_pos = stream_Tell( p_demux->s ) ) >= i_last_pos )
break;
}
if( p_sys->i_last_pcr >= 0 )
{
int64_t i_size = stream_Size( p_demux->s );
mtime_t i_duration_msec = ( p_sys->i_last_pcr - p_sys->i_first_pcr ) * 100 / 9 / 1000;
int64_t i_rate = ( i_size < 0 || i_duration_msec <= 0 ) ? 0 : i_size * 1000 * 8 / i_duration_msec;
const int64_t TS_SUPPOSED_MAXRATE = 55 * 1000 * 1000; //FIXME I think it's enough.
const int64_t TS_SUPPOSED_MINRATE = 0.5 * 1000 * 1000; //FIXME
if( i_rate < TS_SUPPOSED_MINRATE || i_rate > TS_SUPPOSED_MAXRATE )
{
msg_Dbg( p_demux, "calculated bitrate (%lldbit/s) is too low or too high. min bitrate (%lldbit/s) max bitrate (%lldbit/s)",
i_rate, TS_SUPPOSED_MINRATE, TS_SUPPOSED_MAXRATE );
p_sys->i_last_pcr = -1;
}
}
stream_Seek( p_demux->s, i_initial_pos );
p_sys->i_current_pcr = i_initial_pcr;
}
static void CheckPCR( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int64_t i_initial_pos = stream_Tell( p_demux->s );
mtime_t i_initial_pcr = p_sys->i_current_pcr;
int64_t i_size = stream_Size( p_demux->s );
int i = 0;
p_sys->p_pcrs[0] = p_sys->i_first_pcr;
p_sys->p_pos[0] = i_initial_pos;
for( i = 1; i < p_sys->i_pcrs_num && vlc_object_alive( p_demux ); ++i )
{
int64_t i_pos = i_size / p_sys->i_pcrs_num * i;
if( SeekToPCR( p_demux, i_pos ) )
break;
p_sys->p_pcrs[i] = p_sys->i_current_pcr;
p_sys->p_pos[i] = stream_Tell( p_demux->s );
if( p_sys->p_pcrs[i-1] > p_sys->p_pcrs[i] )
{
msg_Dbg( p_demux, "PCR Wrap Around found between %d%% and %d%% (pcr:%lld(0x%09llx) pcr:%lld(0x%09llx))",
(int)((i-1)*100/p_sys->i_pcrs_num), (int)(i*100/p_sys->i_pcrs_num), p_sys->p_pcrs[i-1], p_sys->p_pcrs[i-1], p_sys->p_pcrs[i], p_sys->p_pcrs[i] );
}
}
if( i < p_sys->i_pcrs_num )
{
msg_Dbg( p_demux, "Force Seek Per Percent: Seeking failed at %d%%.", (int)(i*100/p_sys->i_pcrs_num) );
p_sys->b_force_seek_per_percent = true;
}
stream_Seek( p_demux->s, i_initial_pos );
p_sys->i_current_pcr = i_initial_pcr;
}
static void PCRHandle( demux_t *p_demux, ts_pid_t *pid, block_t *p_bk )
{
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->i_pmt_es <= 0 )
return;
mtime_t i_pcr = GetPCR( p_bk );
if( i_pcr >= 0 )
{
if( p_sys->i_pid_ref_pcr == pid->i_pid )
{
p_sys->i_current_pcr = AdjustPCRWrapAround( p_demux, i_pcr );
}
/* Search program and set the PCR */
for( int i = 0; i < p_sys->i_pmt; i++ )
......
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