1 /*****************************************************************************
2 * input_ps.c: PS demux and packet management
3 *****************************************************************************
4 * Copyright (C) 1998, 1999, 2000 VideoLAN
5 * $Id: input_ps.c,v 1.23 2001/05/08 00:43:57 sam Exp $
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Cyril Deguet <asmax@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
25 #define MODULE_NAME ps
26 #include "modules_inner.h"
28 /*****************************************************************************
30 *****************************************************************************/
35 #ifdef STRNCASECMP_IN_STRINGS_H
40 #include <sys/types.h>
55 #include "stream_control.h"
56 #include "input_ext-intf.h"
57 #include "input_ext-dec.h"
62 #include "mpeg_system.h"
68 /*****************************************************************************
70 *****************************************************************************/
71 static int PSProbe ( probedata_t * );
72 static int PSRead ( struct input_thread_s *,
73 data_packet_t * p_packets[INPUT_READ_ONCE] );
74 static void PSInit ( struct input_thread_s * );
75 static void PSEnd ( struct input_thread_s * );
76 static void PSSeek ( struct input_thread_s *, off_t );
77 static struct pes_packet_s * NewPES ( void * );
78 static struct data_packet_s * NewPacket ( void *, size_t );
79 static void DeletePacket( void *, struct data_packet_s * );
80 static void DeletePES ( void *, struct pes_packet_s * );
82 /*****************************************************************************
83 * Functions exported as capabilities. They are declared as static so that
84 * we don't pollute the namespace too much.
85 *****************************************************************************/
86 void _M( input_getfunctions )( function_list_t * p_function_list )
88 #define input p_function_list->functions.input
89 p_function_list->pf_probe = PSProbe;
90 input.pf_init = PSInit;
91 input.pf_open = input_FileOpen;
92 input.pf_close = input_FileClose;
94 input.pf_set_area = NULL;
95 input.pf_read = PSRead;
96 input.pf_demux = input_DemuxPS;
97 input.pf_new_packet = NewPacket;
98 input.pf_new_pes = NewPES;
99 input.pf_delete_packet = DeletePacket;
100 input.pf_delete_pes = DeletePES;
101 input.pf_rewind = NULL;
102 input.pf_seek = PSSeek;
107 * Data reading functions
110 /*****************************************************************************
111 * PSProbe: verifies that the stream is a PS stream
112 *****************************************************************************/
113 static int PSProbe( probedata_t *p_data )
115 input_thread_t * p_input = (input_thread_t *)p_data;
117 char * psz_name = p_input->p_source;
121 if( TestMethod( INPUT_METHOD_VAR, "ps" ) )
126 if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
128 /* If the user specified "file:" then it's probably a file */
133 i_handle = open( psz_name, 0 );
143 /*****************************************************************************
144 * PSInit: initializes PS structures
145 *****************************************************************************/
146 static void PSInit( input_thread_t * p_input )
148 thread_ps_data_t * p_method;
149 packet_cache_t * p_packet_cache;
152 (thread_ps_data_t *)malloc( sizeof(thread_ps_data_t) )) == NULL )
154 intf_ErrMsg( "Out of memory" );
155 p_input->b_error = 1;
158 p_input->p_plugin_data = (void *)p_method;
160 /* creates the packet cache structure */
161 p_packet_cache = malloc( sizeof(packet_cache_t) );
162 if ( p_packet_cache == NULL )
164 intf_ErrMsg( "Out of memory" );
165 p_input->b_error = 1;
168 p_input->p_method_data = (void *)p_packet_cache;
170 /* Initialize packet cache mutex */
171 vlc_mutex_init( &p_packet_cache->lock );
173 /* allocates the data cache */
174 p_packet_cache->data.p_stack = malloc( DATA_CACHE_SIZE *
175 sizeof(data_packet_t*) );
176 if ( p_packet_cache->data.p_stack == NULL )
178 intf_ErrMsg( "Out of memory" );
179 p_input->b_error = 1;
182 p_packet_cache->data.l_index = 0;
184 /* allocates the PES cache */
185 p_packet_cache->pes.p_stack = malloc( PES_CACHE_SIZE *
186 sizeof(pes_packet_t*) );
187 if ( p_packet_cache->pes.p_stack == NULL )
189 intf_ErrMsg( "Out of memory" );
190 p_input->b_error = 1;
193 p_packet_cache->pes.l_index = 0;
195 /* allocates the small buffer cache */
196 p_packet_cache->small.p_stack = malloc( SMALL_CACHE_SIZE *
197 sizeof(packet_buffer_t) );
198 if ( p_packet_cache->small.p_stack == NULL )
200 intf_ErrMsg( "Out of memory" );
201 p_input->b_error = 1;
204 p_packet_cache->small.l_index = 0;
206 /* allocates the large buffer cache */
207 p_packet_cache->large.p_stack = malloc( LARGE_CACHE_SIZE *
208 sizeof(packet_buffer_t) );
209 if ( p_packet_cache->large.p_stack == NULL )
211 intf_ErrMsg( "Out of memory" );
212 p_input->b_error = 1;
215 p_packet_cache->large.l_index = 0;
217 /* Re-open the socket as a buffered FILE stream */
218 if( (p_method->stream = fdopen( p_input->i_handle, "r" )) == NULL )
220 intf_ErrMsg( "Cannot open file (%s)", strerror(errno) );
221 p_input->b_error = 1;
224 rewind( p_method->stream );
226 /* FIXME : detect if InitStream failed */
227 input_InitStream( p_input, sizeof( stream_ps_data_t ) );
228 input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
230 if( p_input->stream.b_seekable )
232 stream_ps_data_t * p_demux_data =
233 (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
235 /* Pre-parse the stream to gather stream_descriptor_t. */
236 p_input->stream.pp_programs[0]->b_is_ok = 0;
237 p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
239 while( !p_input->b_die && !p_input->b_error
240 && !p_demux_data->b_has_PSM )
243 data_packet_t * pp_packets[INPUT_READ_ONCE];
245 i_result = PSRead( p_input, pp_packets );
249 vlc_mutex_lock( &p_input->stream.stream_lock );
250 p_input->stream.pp_programs[0]->b_is_ok = 1;
251 vlc_mutex_unlock( &p_input->stream.stream_lock );
256 p_input->b_error = 1;
260 for( i = 0; i < INPUT_READ_ONCE && pp_packets[i] != NULL; i++ )
262 /* FIXME: use i_p_config_t */
263 input_ParsePS( p_input, pp_packets[i] );
264 DeletePacket( p_input->p_method_data, pp_packets[i] );
268 if( p_input->stream.p_selected_area->i_tell >
269 INPUT_PREPARSE_LENGTH )
274 rewind( p_method->stream );
275 vlc_mutex_lock( &p_input->stream.stream_lock );
277 p_input->stream.i_method = INPUT_METHOD_FILE;
278 p_input->stream.p_selected_area->i_tell = 0;
280 if( p_demux_data->b_has_PSM )
282 /* (The PSM decoder will care about spawning the decoders) */
283 p_input->stream.pp_programs[0]->b_is_ok = 1;
288 /* (We have to do it ourselves) */
291 /* FIXME: we should do multiple passes in case an audio type
294 i_es < p_input->stream.pp_programs[0]->i_es_number;
297 #define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
298 switch( p_es->i_type )
302 input_SelectES( p_input, p_es );
307 if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
308 == (p_es->i_id & 0x1F) )
309 switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
312 main_PutIntVariable( INPUT_AUDIO_VAR,
315 input_SelectES( p_input, p_es );
320 if( main_GetIntVariable( INPUT_CHANNEL_VAR, 0 )
321 == ((p_es->i_id & 0xF00) >> 8) )
322 switch( main_GetIntVariable( INPUT_AUDIO_VAR, 0 ) )
325 main_PutIntVariable( INPUT_AUDIO_VAR,
328 input_SelectES( p_input, p_es );
333 if( main_GetIntVariable( INPUT_SUBTITLE_VAR, -1 )
334 == ((p_es->i_id & 0x1F00) >> 8) )
336 input_SelectES( p_input, p_es );
349 input_DumpStream( p_input );
351 vlc_mutex_unlock( &p_input->stream.stream_lock );
355 /* The programs will be added when we read them. */
356 vlc_mutex_lock( &p_input->stream.stream_lock );
357 p_input->stream.i_method = INPUT_METHOD_FILE;
358 p_input->stream.pp_programs[0]->b_is_ok = 0;
359 vlc_mutex_unlock( &p_input->stream.stream_lock );
363 /*****************************************************************************
364 * PSEnd: frees unused data
365 *****************************************************************************/
366 static void PSEnd( input_thread_t * p_input )
368 vlc_mutex_destroy( &((packet_cache_t *)p_input->p_plugin_data)->lock );
369 free( p_input->p_plugin_data );
372 /*****************************************************************************
373 * SafeRead: reads a chunk of stream and correctly detects errors
374 *****************************************************************************/
375 static __inline__ int SafeRead( input_thread_t * p_input, byte_t * p_buffer,
378 thread_ps_data_t * p_method;
381 p_method = (thread_ps_data_t *)p_input->p_plugin_data;
382 while( fread( p_buffer, i_len, 1, p_method->stream ) != 1 )
384 if( feof( p_method->stream ) )
389 if( (i_error = ferror( p_method->stream )) )
391 intf_ErrMsg( "Read failed (%s)", strerror(i_error) );
395 vlc_mutex_lock( &p_input->stream.stream_lock );
396 p_input->stream.p_selected_area->i_tell += i_len;
397 vlc_mutex_unlock( &p_input->stream.stream_lock );
401 /*****************************************************************************
402 * PSRead: reads data packets
403 *****************************************************************************
404 * Returns -1 in case of error, 0 if everything went well, and 1 in case of
406 *****************************************************************************/
407 static int PSRead( input_thread_t * p_input,
408 data_packet_t * pp_packets[INPUT_READ_ONCE] )
411 data_packet_t * p_data;
412 size_t i_packet_size;
413 int i_packet, i_error;
414 thread_ps_data_t * p_method;
416 p_method = (thread_ps_data_t *)p_input->p_plugin_data;
418 memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
419 for( i_packet = 0; i_packet < INPUT_READ_ONCE; i_packet++ )
421 /* Read what we believe to be a packet header. */
422 if( (i_error = SafeRead( p_input, p_header, 6 )) )
427 if( (U32_AT(p_header) & 0xFFFFFF00) != 0x100L )
429 /* This is not the startcode of a packet. Read the stream
430 * until we find one. */
431 u32 i_startcode = U32_AT(p_header);
436 /* It is common for MPEG-1 streams to pad with zeros
437 * (although it is forbidden by the recommendation), so
438 * don't bother everybody in this case. */
439 intf_WarnMsg( 3, "Garbage at input (%.8x)", i_startcode );
442 while( (i_startcode & 0xFFFFFF00) != 0x100L )
445 if( (i_dummy = getc( p_method->stream )) != EOF )
447 i_startcode |= i_dummy;
455 *(u32 *)p_header = U32_AT(&i_startcode);
456 if( (i_error = SafeRead( p_input, p_header + 4, 2 )) )
462 if( U32_AT(p_header) != 0x1BA )
464 /* That's the case for all packets, except pack header. */
465 i_packet_size = U16_AT(&p_header[4]);
470 if( (p_header[4] & 0xC0) == 0x40 )
475 else if( (p_header[4] & 0xF0) == 0x20 )
482 intf_ErrMsg( "Unable to determine stream type" );
487 /* Fetch a packet of the appropriate size. */
488 if( (p_data = NewPacket( p_input->p_method_data, i_packet_size + 6 ))
491 intf_ErrMsg( "Out of memory" );
495 /* Copy the header we already read. */
496 memcpy( p_data->p_buffer, p_header, 6 );
498 /* Read the remaining of the packet. */
499 if( i_packet_size && (i_error =
500 SafeRead( p_input, p_data->p_buffer + 6, i_packet_size )) )
505 /* In MPEG-2 pack headers we still have to read stuffing bytes. */
506 if( U32_AT(p_header) == 0x1BA )
508 if( i_packet_size == 8 && (p_data->p_buffer[13] & 0x7) != 0 )
510 /* MPEG-2 stuffing bytes */
512 if( (i_error = SafeRead( p_input, p_garbage,
513 p_data->p_buffer[13] & 0x7)) )
520 /* Give the packet to the other input stages. */
521 pp_packets[i_packet] = p_data;
527 /*****************************************************************************
528 * PSSeek: changes the stream position indicator
529 *****************************************************************************/
530 static void PSSeek( input_thread_t * p_input, off_t i_position )
532 thread_ps_data_t * p_method;
534 p_method = (thread_ps_data_t *)p_input->p_plugin_data;
536 /* A little bourrin but should work for a while --Meuuh */
538 fseeko( p_method->stream, i_position, SEEK_SET );
540 fseek( p_method->stream, (long)i_position, SEEK_SET );
543 p_input->stream.p_selected_area->i_tell = i_position;
547 * Packet management utilities
551 /*****************************************************************************
552 * NewPacket: allocates a data packet
553 *****************************************************************************/
554 static struct data_packet_s * NewPacket( void * p_packet_cache,
557 packet_cache_t * p_cache;
558 data_packet_t * p_data;
561 p_cache = (packet_cache_t *)p_packet_cache;
564 if ( p_cache == NULL )
566 intf_ErrMsg( "PPacket cache not initialized" );
572 if( l_size > INPUT_MAX_PACKET_SIZE )
574 intf_ErrMsg( "Packet too big (%d)", l_size );
578 vlc_mutex_lock( &p_cache->lock );
580 /* Checks whether the data cache is empty */
581 if( p_cache->data.l_index == 0 )
583 /* Allocates a new packet */
584 if ( (p_data = malloc( sizeof(data_packet_t) )) == NULL )
586 intf_ErrMsg( "Out of memory" );
587 vlc_mutex_unlock( &p_cache->lock );
591 intf_DbgMsg( "PS input: data packet allocated" );
596 /* Takes the packet out from the cache */
597 if( (p_data = p_cache->data.p_stack[ -- p_cache->data.l_index ])
600 intf_ErrMsg( "NULL packet in the data cache" );
601 vlc_mutex_unlock( &p_cache->lock );
606 if( l_size < MAX_SMALL_SIZE )
610 /* Checks whether the buffer cache is empty */
611 if( p_cache->small.l_index == 0 )
613 /* Allocates a new packet */
614 if ( (p_data->p_buffer = malloc( l_size )) == NULL )
616 intf_DbgMsg( "Out of memory" );
618 vlc_mutex_unlock( &p_cache->lock );
622 intf_DbgMsg( "PS input: small buffer allocated" );
624 p_data->l_size = l_size;
628 /* Takes the packet out from the cache */
629 l_index = -- p_cache->small.l_index;
630 if( (p_data->p_buffer = p_cache->small.p_stack[l_index].p_data)
633 intf_ErrMsg( "NULL packet in the small buffer cache" );
635 vlc_mutex_unlock( &p_cache->lock );
638 /* Reallocates the packet if it is too small or too large */
639 if( p_cache->small.p_stack[l_index].l_size < l_size ||
640 p_cache->small.p_stack[l_index].l_size > 2*l_size )
642 p_data->p_buffer = realloc( p_data->p_buffer, l_size );
643 p_data->l_size = l_size;
647 p_data->l_size = p_cache->small.p_stack[l_index].l_size;
655 /* Checks whether the buffer cache is empty */
656 if( p_cache->large.l_index == 0 )
658 /* Allocates a new packet */
659 if ( (p_data->p_buffer = malloc( l_size )) == NULL )
661 intf_ErrMsg( "Out of memory" );
663 vlc_mutex_unlock( &p_cache->lock );
667 intf_DbgMsg( "PS input: large buffer allocated" );
669 p_data->l_size = l_size;
673 /* Takes the packet out from the cache */
674 l_index = -- p_cache->large.l_index;
675 if( (p_data->p_buffer = p_cache->large.p_stack[l_index].p_data)
678 intf_ErrMsg( "NULL packet in the small buffer cache" );
680 vlc_mutex_unlock( &p_cache->lock );
683 /* Reallocates the packet if it is too small or too large */
684 if( p_cache->large.p_stack[l_index].l_size < l_size ||
685 p_cache->large.p_stack[l_index].l_size > 2*l_size )
687 p_data->p_buffer = realloc( p_data->p_buffer, l_size );
688 p_data->l_size = l_size;
692 p_data->l_size = p_cache->large.p_stack[l_index].l_size;
697 vlc_mutex_unlock( &p_cache->lock );
699 /* Initialize data */
700 p_data->p_next = NULL;
701 p_data->b_discard_payload = 0;
702 p_data->p_payload_start = p_data->p_buffer;
703 p_data->p_payload_end = p_data->p_buffer + l_size;
710 /*****************************************************************************
711 * NewPES: allocates a pes packet
712 *****************************************************************************/
713 static pes_packet_t * NewPES( void * p_packet_cache )
715 packet_cache_t * p_cache;
716 pes_packet_t * p_pes;
718 p_cache = (packet_cache_t *)p_packet_cache;
721 if ( p_cache == NULL )
723 intf_ErrMsg( "Packet cache not initialized" );
728 vlc_mutex_lock( &p_cache->lock );
730 /* Checks whether the PES cache is empty */
731 if( p_cache->pes.l_index == 0 )
733 /* Allocates a new packet */
734 if ( (p_pes = malloc( sizeof(pes_packet_t) )) == NULL )
736 intf_DbgMsg( "Out of memory" );
737 vlc_mutex_unlock( &p_cache->lock );
741 intf_DbgMsg( "PS input: PES packet allocated" );
746 /* Takes the packet out from the cache */
747 if( (p_pes = p_cache->pes.p_stack[ -- p_cache->pes.l_index ])
750 intf_ErrMsg( "NULL packet in the data cache" );
751 vlc_mutex_unlock( &p_cache->lock );
756 vlc_mutex_unlock( &p_cache->lock );
758 p_pes->b_data_alignment = p_pes->b_discontinuity =
759 p_pes->i_pts = p_pes->i_dts = 0;
760 p_pes->i_pes_size = 0;
761 p_pes->p_first = NULL;
767 /*****************************************************************************
768 * DeletePacket: deletes a data packet
769 *****************************************************************************/
770 static void DeletePacket( void * p_packet_cache,
771 data_packet_t * p_data )
773 packet_cache_t * p_cache;
775 p_cache = (packet_cache_t *)p_packet_cache;
778 if ( p_cache == NULL )
780 intf_ErrMsg( "Packet cache not initialized" );
787 vlc_mutex_lock( &p_cache->lock );
789 /* Checks whether the data cache is full */
790 if ( p_cache->data.l_index < DATA_CACHE_SIZE )
792 /* Cache not full: store the packet in it */
793 p_cache->data.p_stack[ p_cache->data.l_index ++ ] = p_data;
794 /* Small buffer or large buffer? */
795 if ( p_data->l_size < MAX_SMALL_SIZE )
797 /* Checks whether the small buffer cache is full */
798 if ( p_cache->small.l_index < SMALL_CACHE_SIZE )
800 p_cache->small.p_stack[ p_cache->small.l_index ].l_size =
802 p_cache->small.p_stack[ p_cache->small.l_index ++ ].p_data =
807 ASSERT( p_data->p_buffer );
808 free( p_data->p_buffer );
810 intf_DbgMsg( "PS input: small buffer freed" );
816 /* Checks whether the large buffer cache is full */
817 if ( p_cache->large.l_index < LARGE_CACHE_SIZE )
819 p_cache->large.p_stack[ p_cache->large.l_index ].l_size =
821 p_cache->large.p_stack[ p_cache->large.l_index ++ ].p_data =
826 ASSERT( p_data->p_buffer );
827 free( p_data->p_buffer );
829 intf_DbgMsg( "PS input: large buffer freed" );
836 /* Cache full: the packet must be freed */
837 free( p_data->p_buffer );
840 intf_DbgMsg( "PS input: data packet freed" );
844 vlc_mutex_unlock( &p_cache->lock );
847 /*****************************************************************************
848 * DeletePES: deletes a PES packet and associated data packets
849 *****************************************************************************/
850 static void DeletePES( void * p_packet_cache, pes_packet_t * p_pes )
852 packet_cache_t * p_cache;
853 data_packet_t * p_data;
854 data_packet_t * p_next;
856 p_cache = (packet_cache_t *)p_packet_cache;
859 if ( p_cache == NULL )
861 intf_ErrMsg( "Packet cache not initialized" );
868 p_data = p_pes->p_first;
870 while( p_data != NULL )
872 p_next = p_data->p_next;
873 DeletePacket( p_cache, p_data );
877 vlc_mutex_lock( &p_cache->lock );
879 /* Checks whether the PES cache is full */
880 if ( p_cache->pes.l_index < PES_CACHE_SIZE )
882 /* Cache not full: store the packet in it */
883 p_cache->pes.p_stack[ p_cache->pes.l_index ++ ] = p_pes;
887 /* Cache full: the packet must be freed */
890 intf_DbgMsg( "PS input: PES packet freed" );
894 vlc_mutex_unlock( &p_cache->lock );