/*****************************************************************************
- * ps.c
+ * ps.c: Program Stream demux module for VLC.
*****************************************************************************
- * Copyright (C) 2004 VideoLAN
+ * Copyright (C) 2004 the VideoLAN team
* $Id$
*
* Authors: Laurent Aimar <fenrir@via.ecp.fr>
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h> /* malloc(), free() */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
#include <vlc/vlc.h>
-#include <vlc/input.h>
+#include <vlc_demux.h>
#include "ps.h"
* - ...
*/
+#define TIME_TEXT N_("Trust MPEG timestamps")
+#define TIME_LONGTEXT N_("Normally we use the timestamps of the MPEG files " \
+ "to calculate position and duration. However sometimes this might not " \
+ "be usable. Disable this option to calculate from the bitrate instead." )
+
/*****************************************************************************
* Module descriptor
*****************************************************************************/
-static int Open ( vlc_object_t * );
+static int OpenForce( vlc_object_t * );
+static int Open ( vlc_object_t * );
static void Close ( vlc_object_t * );
vlc_module_begin();
- set_description( _("PS demuxer") );
- set_capability( "demux2", 0 );
- set_callbacks( Open, Close );
+ set_description( _("MPEG-PS demuxer") );
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_DEMUX );
+ set_capability( "demux2", 1 );
+ set_callbacks( OpenForce, Close );
add_shortcut( "ps" );
+
+ add_bool( "ps-trust-timestamps", true, NULL, TIME_TEXT,
+ TIME_LONGTEXT, true );
+
+ add_submodule();
+ set_description( _("MPEG-PS demuxer") );
+ set_capability( "demux2", 8 );
+ set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
struct demux_sys_t
{
- ps_track_t tk[PS_TK_COUNT];
+ ps_psm_t psm;
+ ps_track_t tk[PS_TK_COUNT];
int64_t i_scr;
int i_mux_rate;
+ int64_t i_length;
+ int i_time_track;
+ int64_t i_current_pts;
+
+ bool b_lost_sync;
+ bool b_have_pack;
+ bool b_seekable;
};
static int Demux ( demux_t *p_demux );
/*****************************************************************************
* Open
*****************************************************************************/
-static int Open( vlc_object_t *p_this )
+static int OpenCommon( vlc_object_t *p_this, bool b_force )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
- uint8_t *p_peek;
+ const uint8_t *p_peek;
if( stream_Peek( p_demux->s, &p_peek, 4 ) < 4 )
{
return VLC_EGENERIC;
}
- if( p_peek[0] != 0 || p_peek[1] != 0 || p_peek[2] != 1 || p_peek[3] < 0xb9 )
+ if( memcmp( p_peek, "\x00\x00\x01", 3 ) || ( p_peek[3] < 0xb9 ) )
{
- msg_Warn( p_demux, "this does not look like an MPEG PS stream, continuing anyway" );
+ if( !b_force )
+ return VLC_EGENERIC;
+
+ msg_Warn( p_demux, "this does not look like an MPEG PS stream, "
+ "continuing anyway" );
}
/* Fill p_demux field */
/* Init p_sys */
p_sys->i_mux_rate = 0;
p_sys->i_scr = -1;
+ p_sys->i_length = -1;
+ p_sys->i_current_pts = (mtime_t) 0;
+ p_sys->i_time_track = -1;
+
+ p_sys->b_lost_sync = false;
+ p_sys->b_have_pack = false;
+ p_sys->b_seekable = false;
+
+ stream_Control( p_demux->s, STREAM_CAN_SEEK, &p_sys->b_seekable );
+ ps_psm_init( &p_sys->psm );
ps_track_init( p_sys->tk );
/* TODO prescanning of ES */
return VLC_SUCCESS;
}
+static int OpenForce( vlc_object_t *p_this )
+{
+ return OpenCommon( p_this, true );
+}
+
+static int Open( vlc_object_t *p_this )
+{
+ return OpenCommon( p_this, ((demux_t *)p_this)->b_force );
+}
+
/*****************************************************************************
* Close
*****************************************************************************/
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
+ int i;
+
+ for( i = 0; i < PS_TK_COUNT; i++ )
+ {
+ ps_track_t *tk = &p_sys->tk[i];
+ if( tk->b_seen )
+ {
+ es_format_Clean( &tk->fmt );
+ if( tk->es ) es_out_Del( p_demux->out, tk->es );
+ }
+ }
+
+ ps_psm_destroy( &p_sys->psm );
free( p_sys );
}
+static int Demux2( demux_t *p_demux, bool b_end )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int i_ret, i_id;
+ uint32_t i_code;
+ block_t *p_pkt;
+
+ i_ret = ps_pkt_resynch( p_demux->s, &i_code );
+ if( i_ret < 0 )
+ {
+ return 0;
+ }
+ else if( i_ret == 0 )
+ {
+ if( !p_sys->b_lost_sync )
+ msg_Warn( p_demux, "garbage at input, trying to resync..." );
+
+ p_sys->b_lost_sync = true;
+ return 1;
+ }
+
+ if( p_sys->b_lost_sync ) msg_Warn( p_demux, "found sync code" );
+ p_sys->b_lost_sync = false;
+
+ if( ( p_pkt = ps_pkt_read( p_demux->s, i_code ) ) == NULL )
+ {
+ return 0;
+ }
+ if( (i_id = ps_pkt_id( p_pkt )) >= 0xc0 )
+ {
+ ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
+ if( !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
+ {
+ if( b_end && p_pkt->i_pts > tk->i_last_pts )
+ {
+ tk->i_last_pts = p_pkt->i_pts;
+ }
+ else if ( tk->i_first_pts == -1 )
+ {
+ tk->i_first_pts = p_pkt->i_pts;
+ }
+ }
+ }
+ block_Release( p_pkt );
+ return 1;
+}
+
+static void FindLength( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int64_t i_current_pos = -1, i_size = 0, i_end = 0;
+ int i;
+
+ if( !var_CreateGetInteger( p_demux, "ps-trust-timestamps" ) )
+ return;
+
+ if( p_sys->i_length == -1 ) /* First time */
+ {
+ p_sys->i_length = 0;
+ /* Check beginning */
+ i = 0;
+ i_current_pos = stream_Tell( p_demux->s );
+ while( !p_demux->b_die && i < 40 && Demux2( p_demux, false ) > 0 ) i++;
+
+ /* Check end */
+ i_size = stream_Size( p_demux->s );
+ i_end = __MAX( 0, __MIN( 200000, i_size ) );
+ stream_Seek( p_demux->s, i_size - i_end );
+
+ while( !p_demux->b_die && Demux2( p_demux, true ) > 0 );
+ if( i_current_pos >= 0 ) stream_Seek( p_demux->s, i_current_pos );
+ }
+
+ for( i = 0; i < PS_TK_COUNT; i++ )
+ {
+ ps_track_t *tk = &p_sys->tk[i];
+ if( tk->i_first_pts >= 0 && tk->i_last_pts > 0 )
+ if( tk->i_last_pts > tk->i_first_pts )
+ {
+ int64_t i_length = (int64_t)tk->i_last_pts - tk->i_first_pts;
+ if( i_length > p_sys->i_length )
+ {
+ p_sys->i_length = i_length;
+ p_sys->i_time_track = i;
+ msg_Dbg( p_demux, "we found a length of: "I64Fd, p_sys->i_length );
+ }
+ }
+ }
+}
+
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
- int i_ret;
+ int i_ret, i_id, i_mux_rate;
uint32_t i_code;
- block_t *p_pkt;
+ block_t *p_pkt;
i_ret = ps_pkt_resynch( p_demux->s, &i_code );
if( i_ret < 0 )
}
else if( i_ret == 0 )
{
- msg_Warn( p_demux, "garbage at input" );
+ if( !p_sys->b_lost_sync )
+ msg_Warn( p_demux, "garbage at input, trying to resync..." );
+
+ p_sys->b_lost_sync = true;
return 1;
}
+ if( p_sys->b_lost_sync ) msg_Warn( p_demux, "found sync code" );
+ p_sys->b_lost_sync = false;
+
+ if( p_sys->i_length < 0 && p_sys->b_seekable )
+ FindLength( p_demux );
+
if( ( p_pkt = ps_pkt_read( p_demux->s, i_code ) ) == NULL )
{
return 0;
switch( i_code )
{
- case 0x1b9:
- block_Release( p_pkt );
- break;
- case 0x1ba:
+ case 0x1b9:
+ block_Release( p_pkt );
+ break;
+
+ case 0x1ba:
+ if( !ps_pkt_parse_pack( p_pkt, &p_sys->i_scr, &i_mux_rate ) )
{
- int i_mux_rate;
+ if( !p_sys->b_have_pack ) p_sys->b_have_pack = true;
+ /* done later on to work around bad vcd/svcd streams */
+ /* es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_scr ); */
+ if( i_mux_rate > 0 ) p_sys->i_mux_rate = i_mux_rate;
+ }
+ block_Release( p_pkt );
+ break;
- if( !ps_pkt_parse_pack( p_pkt, &p_sys->i_scr, &i_mux_rate ) )
+ case 0x1bb:
+ if( !ps_pkt_parse_system( p_pkt, &p_sys->psm, p_sys->tk ) )
+ {
+ int i;
+ for( i = 0; i < PS_TK_COUNT; i++ )
{
- es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_scr );
- if( i_mux_rate > 0 )
+ ps_track_t *tk = &p_sys->tk[i];
+
+ if( tk->b_seen && !tk->es && tk->fmt.i_cat != UNKNOWN_ES )
{
- p_sys->i_mux_rate = i_mux_rate;
+ tk->es = es_out_Add( p_demux->out, &tk->fmt );
}
}
- block_Release( p_pkt );
- break;
}
- case 0x1bb:
- if( !ps_pkt_parse_system( p_pkt, p_sys->tk ) )
+ block_Release( p_pkt );
+ break;
+
+ case 0x1bc:
+ if( p_sys->psm.i_version == 0xFFFF )
+ msg_Dbg( p_demux, "contains a PSM");
+
+ ps_psm_fill( &p_sys->psm, p_pkt, p_sys->tk, p_demux->out );
+ block_Release( p_pkt );
+ break;
+
+ default:
+ if( (i_id = ps_pkt_id( p_pkt )) >= 0xc0 )
+ {
+ bool b_new = false;
+ ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
+
+ if( !tk->b_seen )
{
- int i;
- for( i = 0; i < PS_TK_COUNT; i++ )
+ if( !ps_track_fill( tk, &p_sys->psm, i_id ) )
{
- ps_track_t *tk = &p_sys->tk[i];
-
- if( tk->b_seen && !tk->es && tk->fmt.i_cat != UNKNOWN_ES )
- {
- tk->es = es_out_Add( p_demux->out, &tk->fmt );
- }
+ tk->es = es_out_Add( p_demux->out, &tk->fmt );
+ b_new = true;
}
+ else
+ {
+ msg_Dbg( p_demux, "es id=0x%x format unknown", i_id );
+ }
+ tk->b_seen = true;
}
- block_Release( p_pkt );
- break;
- case 0x1bc:
- /* TODO PSM */
- block_Release( p_pkt );
- break;
- default:
- {
- int i_id = ps_pkt_id( p_pkt );
- if( i_id >= 0xc0 )
+ /* The popular VCD/SVCD subtitling WinSubMux does not
+ * renumber the SCRs when merging subtitles into the PES */
+ if( tk->b_seen &&
+ ( tk->fmt.i_codec == VLC_FOURCC('o','g','t',' ') ||
+ tk->fmt.i_codec == VLC_FOURCC('c','v','d',' ') ) )
{
- ps_track_t *tk = &p_sys->tk[PS_ID_TO_TK(i_id)];
+ p_sys->i_scr = -1;
+ }
- if( !tk->b_seen )
- {
- if( !ps_track_fill( tk, i_id ) )
- {
- tk->es = es_out_Add( p_demux->out, &tk->fmt );
- }
- tk->b_seen = VLC_TRUE;
- }
- if( tk->b_seen && tk->es && !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
+ if( p_sys->i_scr > 0 )
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_scr );
+
+ p_sys->i_scr = -1;
+
+ if( tk->b_seen && tk->es &&
+ !ps_pkt_parse_pes( p_pkt, tk->i_skip ) )
+ {
+ if( !b_new && !p_sys->b_have_pack && tk->fmt.i_cat == AUDIO_ES && p_pkt->i_pts > 0 )
{
- es_out_Send( p_demux->out, tk->es, p_pkt );
+ /* A hack to sync the A/V on PES files. */
+ msg_Dbg( p_demux, "force SCR: "I64Fd, p_pkt->i_pts );
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_pkt->i_pts );
}
- else
+
+ if( (int64_t)p_pkt->i_pts > p_sys->i_current_pts )
{
- block_Release( p_pkt );
+ p_sys->i_current_pts = (int64_t)p_pkt->i_pts;
}
+
+ es_out_Send( p_demux->out, tk->es, p_pkt );
}
else
{
block_Release( p_pkt );
}
- break;
}
+ else
+ {
+ block_Release( p_pkt );
+ }
+ break;
}
+
return 1;
}
*pf = 0.0;
}
return VLC_SUCCESS;
+
case DEMUX_SET_POSITION:
f = (double) va_arg( args, double );
i64 = stream_Size( p_demux->s );
-
+ p_sys->i_current_pts = 0;
es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
return stream_Seek( p_demux->s, (int64_t)(i64 * f) );
case DEMUX_GET_TIME:
pi64 = (int64_t*)va_arg( args, int64_t * );
+ if( p_sys->i_time_track >= 0 && p_sys->i_current_pts > 0 )
+ {
+ *pi64 = p_sys->i_current_pts - p_sys->tk[p_sys->i_time_track].i_first_pts;
+ return VLC_SUCCESS;
+ }
if( p_sys->i_mux_rate > 0 )
{
- *pi64 = (int64_t)1000000 * ( stream_Tell( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
+ *pi64 = (int64_t)1000000 * ( stream_Tell( p_demux->s ) / 50 ) /
+ p_sys->i_mux_rate;
return VLC_SUCCESS;
}
*pi64 = 0;
case DEMUX_GET_LENGTH:
pi64 = (int64_t*)va_arg( args, int64_t * );
- if( p_sys->i_mux_rate > 0 )
+ if( p_sys->i_length > 0 )
+ {
+ *pi64 = p_sys->i_length;
+ return VLC_SUCCESS;
+ }
+ else if( p_sys->i_mux_rate > 0 )
{
- *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) / p_sys->i_mux_rate;
+ *pi64 = (int64_t)1000000 * ( stream_Size( p_demux->s ) / 50 ) /
+ p_sys->i_mux_rate;
return VLC_SUCCESS;
}
*pi64 = 0;
return VLC_EGENERIC;
case DEMUX_SET_TIME:
+ i64 = (int64_t)va_arg( args, int64_t );
+ if( p_sys->i_time_track >= 0 && p_sys->i_current_pts > 0 )
+ {
+ int64_t i_now = p_sys->i_current_pts - p_sys->tk[p_sys->i_time_track].i_first_pts;
+ int64_t i_pos = stream_Tell( p_demux->s );
+ int64_t i_offset = i_pos / (i_now / 1000000) * ((i64 - i_now) / 1000000);
+ stream_Seek( p_demux->s, i_pos + i_offset);
+
+ es_out_Control( p_demux->out, ES_OUT_RESET_PCR );
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+
case DEMUX_GET_FPS:
default:
return VLC_EGENERIC;
* Divers:
*****************************************************************************/
-/* PSResynch: resynch on a systeme starcode
+/* PSResynch: resynch on a system startcode
* It doesn't skip more than 512 bytes
* -1 -> error, 0 -> not synch, 1 -> ok
*/
static int ps_pkt_resynch( stream_t *s, uint32_t *pi_code )
{
- uint8_t *p_peek;
+ const uint8_t *p_peek;
int i_peek;
int i_skip;
{
return -1;
}
- if( p_peek[0] == 0 && p_peek[1] == 0 && p_peek[2] == 1 && p_peek[3] >= 0xb9 )
+ if( p_peek[0] == 0 && p_peek[1] == 0 && p_peek[2] == 1 &&
+ p_peek[3] >= 0xb9 )
{
*pi_code = 0x100 | p_peek[3];
return 1;
{
break;
}
- if( p_peek[0] == 0 && p_peek[1] == 0 && p_peek[2] == 1 && p_peek[3] >= 0xb9 )
+ if( p_peek[0] == 0 && p_peek[1] == 0 && p_peek[2] == 1 &&
+ p_peek[3] >= 0xb9 )
{
*pi_code = 0x100 | p_peek[3];
return stream_Read( s, NULL, i_skip ) == i_skip ? 1 : -1;
static block_t *ps_pkt_read( stream_t *s, uint32_t i_code )
{
- uint8_t *p_peek;
+ const uint8_t *p_peek;
int i_peek = stream_Peek( s, &p_peek, 14 );
int i_size = ps_pkt_size( p_peek, i_peek );
- if( i_size > 0 )
+ if( i_size <= 6 && p_peek[3] > 0xba )
{
- return stream_Block( s, i_size );
+ /* Special case, search the next start code */
+ i_size = 6;
+ for( ;; )
+ {
+ i_peek = stream_Peek( s, &p_peek, i_size + 1024 );
+ if( i_peek <= i_size + 4 )
+ {
+ return NULL;
+ }
+ while( i_size <= i_peek - 4 )
+ {
+ if( p_peek[i_size] == 0x00 && p_peek[i_size+1] == 0x00 &&
+ p_peek[i_size+2] == 0x01 && p_peek[i_size+3] >= 0xb9 )
+ {
+ return stream_Block( s, i_size );
+ }
+ i_size++;
+ }
+ }
+ }
+ else
+ {
+ /* Normal case */
+ return stream_Block( s, i_size );
}
+
return NULL;
}
projects / vlc / blobdiff