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https://code.videolan.org/videolan/vlc
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![Johan Bilien](/assets/img/avatar_default.png)
* Added a mpeg_ts_dvbpsi module tha uses libdvbpsi to decode PSIs. It is used by default if the lib is found. It shares much code with mpeg_ts
364 lines
17 KiB
C
364 lines
17 KiB
C
/*****************************************************************************
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* input_ext-intf.h: structures of the input exported to the interface
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* This header provides structures to read the stream descriptors and
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* control the pace of reading.
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*****************************************************************************
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* Copyright (C) 1999, 2000 VideoLAN
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* $Id: input_ext-intf.h,v 1.66 2002/04/25 02:10:33 jobi 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 input -> interface
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*/
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/* FIXME ! */
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#define REQUESTED_MPEG 1
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#define REQUESTED_AC3 2
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#define REQUESTED_LPCM 3
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#define REQUESTED_NOAUDIO 255
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#define OFFSETTOTIME_MAX_SIZE 10
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/*****************************************************************************
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* input_bank_t, p_input_bank (global variable)
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*****************************************************************************
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* This global variable is accessed by any function using the input.
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*****************************************************************************/
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typedef struct input_bank_s
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{
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/* Array to all the input threads */
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struct input_thread_s *pp_input[ INPUT_MAX_THREADS ];
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int i_count;
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vlc_mutex_t lock; /* Global lock */
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} input_bank_t;
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#ifndef __PLUGIN__
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extern input_bank_t *p_input_bank;
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#else
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# define p_input_bank (p_symbols->p_input_bank)
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#endif
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/*****************************************************************************
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* es_descriptor_t: elementary stream descriptor
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*****************************************************************************
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* Describes an elementary stream, and includes fields required to handle and
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* demultiplex this elementary stream.
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*****************************************************************************/
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typedef struct es_descriptor_s
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{
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u16 i_id; /* stream ID for PS, PID for TS */
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u8 i_stream_id; /* stream ID defined in the PES */
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u8 i_type; /* stream type */
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boolean_t b_audio; /* is the stream an audio stream that
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* will need to be discarded with
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* fast forward and slow motion ? */
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u8 i_cat; /* stream category: video, audio,
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* spu, other */
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int i_demux_fd; /* used to store demux device
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file handle */
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char psz_desc[20]; /* description of ES: audio language
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* for instance ; NULL if not
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* available */
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/* Demultiplexer information */
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void * p_demux_data;
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struct pgrm_descriptor_s *
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p_pgrm; /* very convenient in the demultiplexer */
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/* PES parser information */
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struct pes_packet_s * p_pes; /* Current PES */
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int i_pes_real_size; /* as indicated by the header */
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/* Decoder information */
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struct decoder_fifo_s * p_decoder_fifo;
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vlc_thread_t thread_id; /* ID of the decoder */
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count_t c_packets; /* total packets read */
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count_t c_invalid_packets; /* invalid packets read */
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/* Module properties */
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struct module_s * p_module;
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struct decoder_config_s * p_config;
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} es_descriptor_t;
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/* Special PID values - note that the PID is only on 13 bits, and that values
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* greater than 0x1fff have no meaning in a stream */
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#define PROGRAM_ASSOCIATION_TABLE_PID 0x0000
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#define CONDITIONNAL_ACCESS_TABLE_PID 0x0001 /* not used */
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#define EMPTY_ID 0xffff /* empty record in a table */
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/* ES Categories to be used by interface plugins */
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#define VIDEO_ES 0x00
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#define AUDIO_ES 0x01
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#define SPU_ES 0x02
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#define NAV_ES 0x03
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#define UNKNOWN_ES 0xFF
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/*****************************************************************************
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* pgrm_descriptor_t
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*****************************************************************************
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* Describes a program and list associated elementary streams. It is build by
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* the PSI decoder upon the informations carried in program map sections
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*****************************************************************************/
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typedef struct pgrm_descriptor_s
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{
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/* Program characteristics */
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u16 i_number; /* program number */
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u8 i_version; /* version number */
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boolean_t b_is_ok; /* Is the description up to date ? */
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/* Service Descriptor (program name) - DVB extension */
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u8 i_srv_type;
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char * psz_srv_name;
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/* Synchronization information */
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mtime_t delta_cr;
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mtime_t cr_ref, sysdate_ref;
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mtime_t last_cr; /* reference to detect unexpected stream
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* discontinuities */
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mtime_t last_syscr;
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count_t c_average_count;
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/* counter used to compute dynamic average values */
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int i_synchro_state;
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/* Demultiplexer data */
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void * p_demux_data;
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int i_es_number; /* size of the following array */
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es_descriptor_t ** pp_es; /* array of pointers to ES */
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} pgrm_descriptor_t;
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/* Synchro states */
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#define SYNCHRO_OK 0
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#define SYNCHRO_START 1
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#define SYNCHRO_REINIT 2
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/*****************************************************************************
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* input_area_t
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*****************************************************************************
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* Attributes for current area (title for DVD)
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*****************************************************************************/
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typedef struct input_area_s
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{
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/* selected area attributes */
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int i_id; /* identificator for area */
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off_t i_start; /* start offset of area */
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off_t i_size; /* total size of the area
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* (in arbitrary units) */
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/* navigation parameters */
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off_t i_tell; /* actual location in the area
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* (in arbitrary units) */
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off_t i_seek; /* next requested location
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* (changed by the interface thread */
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/* area subdivision */
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int i_part_nb; /* number of parts (chapter for DVD)*/
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int i_part; /* currently selected part */
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/* offset to plugin related data */
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off_t i_plugin_data;
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} input_area_t;
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/*****************************************************************************
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* stream_descriptor_t
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*****************************************************************************
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* Describes a stream and list its associated programs. Build upon
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* the information carried in program association sections (for instance)
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*****************************************************************************/
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typedef struct stream_descriptor_s
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{
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u16 i_stream_id; /* stream id */
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boolean_t b_changed; /* if stream has been changed,
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we have to inform the interface */
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vlc_mutex_t stream_lock; /* to be taken every time you read
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* or modify stream, pgrm or es */
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/* Input method data */
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int i_method; /* input method for stream: file,
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disc or network */
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boolean_t b_pace_control; /* can we read when we want ? */
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boolean_t b_seekable; /* can we do lseek() ? */
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/* if (b_seekable) : */
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int i_area_nb;
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input_area_t ** pp_areas; /* list of areas in stream == offset
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* interval with own properties */
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input_area_t * p_selected_area;
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input_area_t * p_new_area; /* Newly selected area from
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* the interface */
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u32 i_mux_rate; /* the rate we read the stream (in
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* units of 50 bytes/s) ; 0 if undef */
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/* New status and rate requested by the interface */
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int i_new_status, i_new_rate;
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int b_new_mute; /* int because it can be -1 */
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vlc_cond_t stream_wait; /* interface -> input in case of a
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* status change request */
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/* Demultiplexer data */
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void * p_demux_data;
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/* Programs descriptions */
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int i_pgrm_number; /* size of the following array */
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pgrm_descriptor_t ** pp_programs; /* array of pointers to pgrm */
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pgrm_descriptor_t * p_selected_program; /* currently
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selected program */
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pgrm_descriptor_t * p_new_program; /* Newly selected program */
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/* ES descriptions */
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int i_es_number;
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es_descriptor_t ** pp_es; /* carried elementary streams */
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int i_selected_es_number;
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es_descriptor_t ** pp_selected_es; /* ES with a decoder */
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es_descriptor_t * p_newly_selected_es; /* ES selected from
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* the interface */
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es_descriptor_t * p_removed_es; /* ES removed from the interface */
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/* Stream control */
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stream_ctrl_t control;
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/* Statistics */
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count_t c_packets_read; /* packets read */
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count_t c_packets_trashed; /* trashed packets */
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} stream_descriptor_t;
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#define MUTE_NO_CHANGE -1
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/*****************************************************************************
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* input_thread_t
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*****************************************************************************
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* This structure includes all the local static variables of an input thread
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*****************************************************************************/
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typedef struct input_thread_s
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{
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/* Thread properties and locks */
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boolean_t b_die; /* 'die' flag */
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boolean_t b_error;
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boolean_t b_eof;
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vlc_thread_t thread_id; /* id for thread functions */
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int i_status; /* status flag */
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/* Access module */
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struct module_s * p_access_module;
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int (* pf_open)( struct input_thread_s * );
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void (* pf_close)( struct input_thread_s * );
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ssize_t (* pf_read) ( struct input_thread_s *,
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byte_t *, size_t );
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int (* pf_set_program)( struct input_thread_s *,
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struct pgrm_descriptor_s * );
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int (* pf_set_area)( struct input_thread_s *,
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struct input_area_s * );
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void (* pf_seek)( struct input_thread_s *, off_t );
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void * p_access_data;
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size_t i_mtu;
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/* Demux module */
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struct module_s * p_demux_module;
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int (* pf_init)( struct input_thread_s * );
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void (* pf_end)( struct input_thread_s * );
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int (* pf_demux)( struct input_thread_s * );
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int (* pf_rewind)( struct input_thread_s * );
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/* NULL if we don't support going *
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* backwards (it's gonna be fun) */
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void * p_demux_data; /* data of the demux */
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/* Buffer manager */
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struct input_buffers_s *p_method_data; /* data of the packet manager */
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struct data_buffer_s * p_data_buffer;
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byte_t * p_current_data;
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byte_t * p_last_data;
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size_t i_bufsize;
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/* General stream description */
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stream_descriptor_t stream;
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/* Playlist item */
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char * psz_source;
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char * psz_access;
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char * psz_demux;
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char * psz_name;
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count_t c_loops;
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} input_thread_t;
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/* Input methods */
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/* The first figure is a general method that can be used in interface plugins ;
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* The second figure is a detailed sub-method */
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#define INPUT_METHOD_NONE 0x0 /* input thread is inactive */
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#define INPUT_METHOD_FILE 0x10 /* stream is read from file p_source */
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#define INPUT_METHOD_DISC 0x20 /* stream is read directly from disc */
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#define INPUT_METHOD_DVD 0x21 /* stream is read from DVD */
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#define INPUT_METHOD_VCD 0x22 /* stream is read from VCD */
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#define INPUT_METHOD_NETWORK 0x30 /* stream is read from network */
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#define INPUT_METHOD_UCAST 0x31 /* UDP unicast */
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#define INPUT_METHOD_MCAST 0x32 /* UDP multicast */
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#define INPUT_METHOD_BCAST 0x33 /* UDP broadcast */
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#define INPUT_METHOD_VLAN_BCAST 0x34 /* UDP broadcast with VLANs */
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#define INPUT_METHOD_SATELLITE 0x40 /* stream is read from a */
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/* satellite card */
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/* Status changing methods */
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#define INPUT_STATUS_END 0
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#define INPUT_STATUS_PLAY 1
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#define INPUT_STATUS_PAUSE 2
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#define INPUT_STATUS_FASTER 3
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#define INPUT_STATUS_SLOWER 4
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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_InitBank ( void );
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void input_EndBank ( void );
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struct input_thread_s * input_CreateThread ( struct playlist_item_s *,
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int *pi_status );
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void input_StopThread ( struct input_thread_s *, int *pi_status );
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void input_DestroyThread ( struct input_thread_s * );
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void input_SetStatus ( struct input_thread_s *, int );
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void input_Seek ( struct input_thread_s *, off_t );
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void input_DumpStream ( struct input_thread_s * );
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char * input_OffsetToTime ( struct input_thread_s *, char *, off_t );
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int input_ChangeES ( struct input_thread_s *,
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struct es_descriptor_s *, u8 );
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int input_ToggleES ( struct input_thread_s *,
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struct es_descriptor_s *, boolean_t );
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int input_ChangeArea ( struct input_thread_s *, struct input_area_s * );
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int input_ChangeProgram ( struct input_thread_s *, u16 );
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int input_ToggleGrayscale( struct input_thread_s * );
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int input_ToggleMute ( struct input_thread_s * );
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int input_SetSMP ( struct input_thread_s *, int );
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#else
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# define input_SetStatus p_symbols->input_SetStatus
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# define input_Seek p_symbols->input_Seek
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# define input_DumpStream p_symbols->input_DumpStream
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# define input_OffsetToTime p_symbols->input_OffsetToTime
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# define input_ChangeES p_symbols->input_ChangeES
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# define input_ToggleES p_symbols->input_ToggleES
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# define input_ChangeArea p_symbols->input_ChangeArea
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# define input_ChangeProgram p_symbols->input_ChangeProgram
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#endif
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