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316 lines
13 KiB
316 lines
13 KiB
/*****************************************************************************
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* input_ext-plugins.h: structures of the input not exported to other modules,
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* but exported to plug-ins
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*****************************************************************************
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* Copyright (C) 1999, 2000, 2001 VideoLAN
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* $Id: input_ext-plugins.h,v 1.6 2001/11/25 22:52:21 gbazin Exp $
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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/*
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* Communication plugin -> input
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*/
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/* FIXME: you've gotta move this move this, you've gotta move this move this */
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#define INPUT_READ_ONCE 7 /* We live in a world dominated by Ethernet. *
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* Ethernet MTU is 1500 bytes, so in a UDP *
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* packet we can put : 1500/188 = 7 TS *
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* packets. Have a nice day and merry Xmas. */
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#define PADDING_PACKET_SIZE 188 /* Size of the NULL packet inserted in case
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* of data loss (this should be < 188). */
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#define PADDING_PACKET_NUMBER 10 /* Number of padding packets top insert to
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* escape a decoder. */
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#define NO_SEEK -1
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/*****************************************************************************
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* Prototypes from input_ext-dec.c
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*****************************************************************************/
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#ifndef PLUGIN
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void InitBitstream ( struct bit_stream_s *, struct decoder_fifo_s *,
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void (* pf_bitstream_callback)( struct bit_stream_s *,
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boolean_t ),
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void * p_callback_arg );
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void NextDataPacket ( struct bit_stream_s * );
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#endif
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/*****************************************************************************
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* Prototypes from input_programs.c
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*****************************************************************************/
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#ifndef PLUGIN
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int input_InitStream( struct input_thread_s *, size_t );
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void input_EndStream ( struct input_thread_s * );
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struct pgrm_descriptor_s * input_FindProgram( struct input_thread_s *, u16 );
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struct pgrm_descriptor_s * input_AddProgram ( struct input_thread_s *,
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u16, size_t );
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void input_DelProgram( struct input_thread_s *, struct pgrm_descriptor_s * );
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struct input_area_s * input_AddArea( struct input_thread_s * );
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void input_DelArea ( struct input_thread_s *, struct input_area_s * );
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struct es_descriptor_s * input_FindES( struct input_thread_s *, u16 );
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struct es_descriptor_s * input_AddES ( struct input_thread_s *,
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struct pgrm_descriptor_s *, u16,
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size_t );
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void input_DelES ( struct input_thread_s *, struct es_descriptor_s * );
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int input_SelectES ( struct input_thread_s *, struct es_descriptor_s * );
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int input_UnselectES( struct input_thread_s *, struct es_descriptor_s * );
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#endif
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/*****************************************************************************
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* Prototypes from input_dec.c
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*****************************************************************************/
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#ifndef PLUGIN
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//decoder_capabilities_s * input_ProbeDecoder( void );
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vlc_thread_t input_RunDecoder( struct input_thread_s *,
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struct es_descriptor_s * );
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void input_EndDecoder( struct input_thread_s *, struct es_descriptor_s * );
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void input_DecodePES ( struct decoder_fifo_s *, struct pes_packet_s * );
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void input_EscapeDiscontinuity( struct input_thread_s *,
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struct pgrm_descriptor_s * );
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void input_EscapeAudioDiscontinuity( struct input_thread_s * );
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#endif
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/*****************************************************************************
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* Prototypes from input_clock.c
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*****************************************************************************/
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#ifndef PLUGIN
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void input_ClockInit( struct pgrm_descriptor_s * );
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int input_ClockManageControl( struct input_thread_s *,
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struct pgrm_descriptor_s *, mtime_t );
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void input_ClockManageRef( struct input_thread_s *,
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struct pgrm_descriptor_s *, mtime_t );
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mtime_t input_ClockGetTS( struct input_thread_s *,
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struct pgrm_descriptor_s *, mtime_t );
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#endif
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/*****************************************************************************
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* Create a NULL packet for padding in case of a data loss
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*****************************************************************************/
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static __inline__ void input_NullPacket( input_thread_t * p_input,
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es_descriptor_t * p_es )
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{
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data_packet_t * p_pad_data;
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pes_packet_t * p_pes;
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if( (p_pad_data = p_input->pf_new_packet(
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p_input->p_method_data,
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PADDING_PACKET_SIZE )) == NULL )
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{
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intf_ErrMsg("Out of memory");
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p_input->b_error = 1;
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return;
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}
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memset( p_pad_data->p_buffer, 0, PADDING_PACKET_SIZE );
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p_pad_data->b_discard_payload = 1;
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p_pes = p_es->p_pes;
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if( p_pes != NULL )
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{
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p_pes->b_discontinuity = 1;
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p_es->p_last->p_next = p_pad_data;
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p_es->p_last = p_pad_data;
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}
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else
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{
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if( (p_pes = p_input->pf_new_pes( p_input->p_method_data )) == NULL )
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{
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intf_ErrMsg("Out of memory");
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p_input->b_error = 1;
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return;
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}
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p_pes->i_rate = p_input->stream.control.i_rate;
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p_pes->p_first = p_pad_data;
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p_pes->b_discontinuity = 1;
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input_DecodePES( p_es->p_decoder_fifo, p_pes );
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}
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}
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/*
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* Optional netlist management
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*/
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/*****************************************************************************
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* netlist_t: structure to manage a netlist
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*****************************************************************************/
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typedef struct netlist_s
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{
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vlc_mutex_t lock;
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size_t i_buffer_size;
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/* Buffers */
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byte_t * p_buffers; /* Big malloc'ed area */
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data_packet_t * p_data; /* malloc'ed area */
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pes_packet_t * p_pes; /* malloc'ed area */
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/* FIFOs of free packets */
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data_packet_t ** pp_free_data;
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pes_packet_t ** pp_free_pes;
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struct iovec * p_free_iovec;
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/* FIFO size */
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unsigned int i_nb_iovec;
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unsigned int i_nb_pes;
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unsigned int i_nb_data;
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/* Index */
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unsigned int i_iovec_start, i_iovec_end;
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unsigned int i_data_start, i_data_end;
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unsigned int i_pes_start, i_pes_end;
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/* Reference counters for iovec */
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unsigned int * pi_refcount;
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/* Number of blocs read once by readv */
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unsigned int i_read_once;
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} netlist_t;
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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#ifndef PLUGIN
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int input_NetlistInit( struct input_thread_s *,
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int i_nb_iovec,
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int i_nb_data,
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int i_nb_pes,
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size_t i_buffer_size,
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int i_read_once );
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struct iovec * input_NetlistGetiovec( void * p_method_data );
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void input_NetlistMviovec( void * , int,
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struct data_packet_s **);
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struct data_packet_s * input_NetlistNewPtr( void * );
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struct data_packet_s * input_NetlistNewPacket( void *, size_t );
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struct pes_packet_s * input_NetlistNewPES( void * );
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void input_NetlistDeletePacket( void *,
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struct data_packet_s * );
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void input_NetlistDeletePES( void *,
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struct pes_packet_s * );
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void input_NetlistEnd( struct input_thread_s * );
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#endif
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/*
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* Optional MPEG demultiplexing
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*/
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/*****************************************************************************
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* Constants
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*****************************************************************************/
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#define TS_PACKET_SIZE 188 /* Size of a TS packet */
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#define PSI_SECTION_SIZE 4096 /* Maximum size of a PSI section */
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#define PAT_UNINITIALIZED (1 << 6)
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#define PMT_UNINITIALIZED (1 << 6)
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#define PSI_IS_PAT 0x00
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#define PSI_IS_PMT 0x01
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#define UNKNOWN_PSI 0xff
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/*****************************************************************************
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* psi_section_t
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*****************************************************************************
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* Describes a PSI section. Beware, it doesn't contain pointers to the TS
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* packets that contain it as for a PES, but the data themselves
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*****************************************************************************/
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typedef struct psi_section_s
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{
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byte_t buffer[PSI_SECTION_SIZE];
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u8 i_section_number;
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u8 i_last_section_number;
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u8 i_version_number;
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u16 i_section_length;
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u16 i_read_in_section;
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/* the PSI is complete */
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boolean_t b_is_complete;
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/* packet missed up ? */
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boolean_t b_trash;
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/*about sections */
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boolean_t b_section_complete;
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/* where are we currently ? */
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byte_t * p_current;
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} psi_section_t;
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/*****************************************************************************
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* es_ts_data_t: extension of es_descriptor_t
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*****************************************************************************/
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typedef struct es_ts_data_s
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{
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boolean_t b_psi; /* Does the stream have to be handled by
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* the PSI decoder ? */
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int i_psi_type; /* There are different types of PSI */
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psi_section_t * p_psi_section; /* PSI packets */
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/* Markers */
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int i_continuity_counter;
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} es_ts_data_t;
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/*****************************************************************************
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* pgrm_ts_data_t: extension of pgrm_descriptor_t
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*****************************************************************************/
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typedef struct pgrm_ts_data_s
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{
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u16 i_pcr_pid; /* PCR ES, for TS streams */
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int i_pmt_version;
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} pgrm_ts_data_t;
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/*****************************************************************************
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* stream_ts_data_t: extension of stream_descriptor_t
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*****************************************************************************/
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typedef struct stream_ts_data_s
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{
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int i_pat_version; /* Current version of the PAT */
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} stream_ts_data_t;
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/*****************************************************************************
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* stream_ps_data_t: extension of stream_descriptor_t
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*****************************************************************************/
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typedef struct stream_ps_data_s
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{
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boolean_t b_has_PSM; /* very rare, in fact */
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u8 i_PSM_version;
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} stream_ps_data_t;
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/* PSM version is 5 bits, so -1 is not a valid value */
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#define EMPTY_PSM_VERSION -1
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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#ifndef PLUGIN
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void input_ParsePES ( struct input_thread_s *, struct es_descriptor_s * );
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void input_GatherPES ( struct input_thread_s *, struct data_packet_s *,
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struct es_descriptor_s *, boolean_t, boolean_t );
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es_descriptor_t * input_ParsePS( struct input_thread_s *,
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struct data_packet_s * );
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void input_DemuxPS ( struct input_thread_s *, struct data_packet_s * );
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void input_DemuxTS ( struct input_thread_s *, struct data_packet_s * );
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void input_DemuxPSI ( struct input_thread_s *, struct data_packet_s *,
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struct es_descriptor_s *, boolean_t, boolean_t );
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#endif
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