* mpeg_ps.c : Program Stream input module for vlc
*****************************************************************************
* Copyright (C) 2000-2001 VideoLAN
- * $Id: mpeg_ps.c,v 1.2 2001/12/30 07:09:55 sam Exp $
+ * $Id: mpeg_ps.c,v 1.8 2002/03/18 19:14:52 sam Exp $
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
*****************************************************************************/
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
+#include <errno.h>
#include <videolan/vlc.h>
+#include <sys/types.h>
+
+#include "stream_control.h"
+#include "input_ext-intf.h"
+#include "input_ext-dec.h"
+#include "input_ext-plugins.h"
+
+/*****************************************************************************
+ * Constants
+ *****************************************************************************/
+#define PS_READ_ONCE 50
+
/*****************************************************************************
- * Capabilities defined in the other files.
+ * Local prototypes
*****************************************************************************/
-void _M( input_getfunctions )( function_list_t * p_function_list );
+static void input_getfunctions( function_list_t * p_function_list );
+static int PSDemux ( struct input_thread_s * );
+static int PSInit ( struct input_thread_s * );
+static void PSEnd ( struct input_thread_s * );
/*****************************************************************************
* Build configuration tree.
MODULE_INIT_START
SET_DESCRIPTION( "ISO 13818-1 MPEG Program Stream input" )
- ADD_CAPABILITY( INPUT, 100 )
+ ADD_CAPABILITY( DEMUX, 100 )
ADD_SHORTCUT( "ps" )
MODULE_INIT_STOP
MODULE_ACTIVATE_START
- _M( input_getfunctions )( &p_module->p_functions->input );
+ input_getfunctions( &p_module->p_functions->demux );
MODULE_ACTIVATE_STOP
MODULE_DEACTIVATE_START
MODULE_DEACTIVATE_STOP
+/*****************************************************************************
+ * Functions exported as capabilities. They are declared as static so that
+ * we don't pollute the namespace too much.
+ *****************************************************************************/
+static void input_getfunctions( function_list_t * p_function_list )
+{
+#define input p_function_list->functions.demux
+ input.pf_init = PSInit;
+ input.pf_end = PSEnd;
+ input.pf_demux = PSDemux;
+ input.pf_rewind = NULL;
+#undef input
+}
+
+/*****************************************************************************
+ * PSInit: initializes PS structures
+ *****************************************************************************/
+static int PSInit( input_thread_t * p_input )
+{
+ byte_t * p_peek;
+
+ /* Initialize access plug-in structures. */
+ if( p_input->i_mtu == 0 )
+ {
+ /* Improve speed. */
+ p_input->i_bufsize = INPUT_DEFAULT_BUFSIZE;
+ }
+
+ /* Have a peep at the show. */
+ if( input_Peek( p_input, &p_peek, 4 ) < 4 )
+ {
+ /* Stream shorter than 4 bytes... */
+ intf_ErrMsg( "input error: cannot peek() (mpeg_ps)" );
+ return( -1 );
+ }
+
+ if( *p_peek || *(p_peek + 1) || *(p_peek + 2) != 1 )
+ {
+ if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "ps", 3 ) )
+ {
+ /* User forced */
+ intf_ErrMsg( "input error: this doesn't look like an MPEG PS stream, continuing" );
+ }
+ else
+ {
+ intf_WarnMsg( 2, "input: PS plug-in discarded (no startcode)" );
+ return( -1 );
+ }
+ }
+ else if( *(p_peek + 3) <= 0xb9 )
+ {
+ if( *p_input->psz_demux && !strncmp( p_input->psz_demux, "ps", 3 ) )
+ {
+ /* User forced */
+ intf_ErrMsg( "input error: this seems to be an elementary stream (ES plug-in ?),");
+ intf_ErrMsg( "but continuing" );
+ }
+ else
+ {
+ intf_WarnMsg( 2, "input: PS plug-in discarded (ES startcode)" );
+ return( -1 );
+ }
+ }
+
+ if( input_InitStream( p_input, sizeof( stream_ps_data_t ) ) == -1 )
+ {
+ return( -1 );
+ }
+ input_AddProgram( p_input, 0, sizeof( stream_ps_data_t ) );
+
+ p_input->stream.p_selected_program =
+ p_input->stream.pp_programs[0] ;
+ p_input->stream.p_new_program =
+ p_input->stream.pp_programs[0] ;
+
+ if( p_input->stream.b_seekable )
+ {
+ stream_ps_data_t * p_demux_data =
+ (stream_ps_data_t *)p_input->stream.pp_programs[0]->p_demux_data;
+
+ /* Pre-parse the stream to gather stream_descriptor_t. */
+ p_input->stream.pp_programs[0]->b_is_ok = 0;
+ p_demux_data->i_PSM_version = EMPTY_PSM_VERSION;
+
+ while( !p_input->b_die && !p_input->b_error
+ && !p_demux_data->b_has_PSM )
+ {
+ ssize_t i_result;
+ data_packet_t * p_data;
+
+ i_result = input_ReadPS( p_input, &p_data );
+
+ if( i_result == 0 )
+ {
+ /* EOF */
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+ p_input->stream.pp_programs[0]->b_is_ok = 1;
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+ break;
+ }
+ else if( i_result == -1 )
+ {
+ p_input->b_error = 1;
+ break;
+ }
+
+ input_ParsePS( p_input, p_data );
+ input_DeletePacket( p_input->p_method_data, p_data );
+
+ /* File too big. */
+ if( p_input->stream.p_selected_area->i_tell >
+ INPUT_PREPARSE_LENGTH )
+ {
+ break;
+ }
+ }
+ p_input->pf_seek( p_input, (off_t)0 );
+ input_AccessReinit( p_input );
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+
+ if( p_demux_data->b_has_PSM )
+ {
+ /* (The PSM decoder will care about spawning the decoders) */
+ p_input->stream.pp_programs[0]->b_is_ok = 1;
+ }
+#ifdef AUTO_SPAWN
+ else
+ {
+ /* (We have to do it ourselves) */
+ int i_es;
+
+ /* FIXME: we should do multiple passes in case an audio type
+ * is not present */
+ for( i_es = 0;
+ i_es < p_input->stream.pp_programs[0]->i_es_number;
+ i_es++ )
+ {
+#define p_es p_input->stream.pp_programs[0]->pp_es[i_es]
+ switch( p_es->i_type )
+ {
+ case MPEG1_VIDEO_ES:
+ case MPEG2_VIDEO_ES:
+ input_SelectES( p_input, p_es );
+ break;
+
+ case MPEG1_AUDIO_ES:
+ case MPEG2_AUDIO_ES:
+ if( config_GetIntVariable( "input_channel" )
+ == (p_es->i_id & 0x1F) ||
+ ( config_GetIntVariable( "input_channel" ) < 0
+ && !(p_es->i_id & 0x1F) ) )
+ switch( config_GetIntVariable( "input_audio" ) )
+ {
+ case -1:
+ case REQUESTED_MPEG:
+ input_SelectES( p_input, p_es );
+ }
+ break;
+
+ case AC3_AUDIO_ES:
+ if( config_GetIntVariable( "input_channel" )
+ == ((p_es->i_id & 0xF00) >> 8) ||
+ ( config_GetIntVariable( "input_channel" ) < 0
+ && !((p_es->i_id & 0xF00) >> 8) ) )
+ switch( config_GetIntVariable( "input_audio" ) )
+ {
+ case -1:
+ case REQUESTED_AC3:
+ input_SelectES( p_input, p_es );
+ }
+ break;
+
+ case DVD_SPU_ES:
+ if( config_GetIntVariable( "input_subtitle" )
+ == ((p_es->i_id & 0x1F00) >> 8) )
+ {
+ input_SelectES( p_input, p_es );
+ }
+ break;
+
+ case LPCM_AUDIO_ES:
+ if( config_GetIntVariable( "input_channel" )
+ == ((p_es->i_id & 0x1F00) >> 8) ||
+ ( config_GetIntVariable( "input_channel" ) < 0
+ && !((p_es->i_id & 0x1F00) >> 8) ) )
+ switch( config_GetIntVariable( "input_audio" ) )
+ {
+ case -1:
+ case REQUESTED_LPCM:
+ input_SelectES( p_input, p_es );
+ }
+ break;
+ }
+ }
+
+ }
+#endif
+ if( p_main->b_stats )
+ {
+ input_DumpStream( p_input );
+ }
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+ }
+ else
+ {
+ /* The programs will be added when we read them. */
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+ p_input->stream.i_method = INPUT_METHOD_FILE;
+ p_input->stream.pp_programs[0]->b_is_ok = 0;
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
+ }
+
+ return( 0 );
+}
+
+/*****************************************************************************
+ * PSEnd: frees unused data
+ *****************************************************************************/
+static void PSEnd( input_thread_t * p_input )
+{
+}
+
+/*****************************************************************************
+ * PSDemux: reads and demuxes data packets
+ *****************************************************************************
+ * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
+ * packets.
+ *****************************************************************************/
+static int PSDemux( input_thread_t * p_input )
+{
+ int i;
+
+ for( i = 0; i < PS_READ_ONCE; i++ )
+ {
+ data_packet_t * p_data;
+ ssize_t i_result;
+
+ i_result = input_ReadPS( p_input, &p_data );
+
+ if( i_result <= 0 )
+ {
+ return( i_result );
+ }
+
+ input_DemuxPS( p_input, p_data );
+ }
+
+ return( i );
+}
+
projects / vlc / blobdiff