1 /*****************************************************************************
2 * input.h: structures of the input not exported to other modules
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: input.h,v 1.9 2001/01/15 06:56:30 sam Exp $
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
25 * Communication plugin -> input
28 /* FIXME: you've gotta move this move this, you've gotta move this move this */
29 #define INPUT_READ_ONCE 7 /* We live in a world dominated by Ethernet. *
30 * Ethernet MTU is 1500 bytes, so in a UDP *
31 * packet we can put : 1500/188 = 7 TS *
32 * packets. Have a nice day and merry Xmas. */
33 #define PADDING_PACKET_SIZE 100 /* Size of the NULL packet inserted in case
34 * of data loss (this should be < 188). */
36 /*****************************************************************************
37 * input_capabilities_t
38 *****************************************************************************
39 * This structure gives pointers to the useful methods of the plugin
40 *****************************************************************************/
41 typedef struct input_capabilities_s
43 /* Plugin properties */
44 int i_weight; /* for a given stream type, the plugin *
45 * with higher weight will be used */
48 int (* pf_probe)( struct input_thread_s * );
49 void (* pf_init)( struct input_thread_s * );
50 void (* pf_end)( struct input_thread_s * );
52 /* Read & Demultiplex */
53 int (* pf_read)( struct input_thread_s *,
54 struct data_packet_s * pp_packets[INPUT_READ_ONCE] );
55 void (* pf_demux)( struct input_thread_s *,
56 struct data_packet_s * );
58 /* Packet management facilities */
59 struct data_packet_s *(* pf_new_packet)( void *, size_t );
60 struct pes_packet_s *(* pf_new_pes)( void * );
61 void (* pf_delete_packet)( void *,
62 struct data_packet_s * );
63 void (* pf_delete_pes)( void *, struct pes_packet_s * );
65 /* Stream control capabilities */
66 int (* pf_rewind)( struct input_thread_s * );
67 /* NULL if we don't support going *
68 * backwards (it's gonna be fun) */
69 int (* pf_seek)( struct input_thread_s *, off_t );
70 } input_capabilities_t;
72 /*****************************************************************************
73 * Prototypes from input_ext-dec.c
74 *****************************************************************************/
75 void InitBitstream ( struct bit_stream_s *, struct decoder_fifo_s * );
76 void NextDataPacket ( struct bit_stream_s * );
78 /*****************************************************************************
79 * Prototypes from input_programs.c
80 *****************************************************************************/
81 void input_InitStream( struct input_thread_s *, size_t );
82 void input_EndStream( struct input_thread_s * );
83 struct pgrm_descriptor_s * input_FindProgram( struct input_thread_s *, u16 );
84 struct pgrm_descriptor_s * input_AddProgram( struct input_thread_s *,
86 void input_DelProgram( struct input_thread_s *, struct pgrm_descriptor_s * );
87 void input_DumpStream( struct input_thread_s * );
88 struct es_descriptor_s * input_FindES( struct input_thread_s *, u16 );
89 struct es_descriptor_s * input_AddES( struct input_thread_s *,
90 struct pgrm_descriptor_s *, u16,
92 void input_DelES( struct input_thread_s *, struct es_descriptor_s * );
93 int input_SelectES( struct input_thread_s *, struct es_descriptor_s * );
95 /*****************************************************************************
96 * Prototypes from input_dec.c
97 *****************************************************************************/
98 //decoder_capabilities_s * input_ProbeDecoder( void );
99 vlc_thread_t input_RunDecoder( struct decoder_capabilities_s *, void * );
100 void input_EndDecoder( struct input_thread_s *, struct es_descriptor_s * );
101 void input_DecodePES( struct decoder_fifo_s *, struct pes_packet_s * );
103 /*****************************************************************************
104 * Create a NULL packet for padding in case of a data loss
105 *****************************************************************************/
106 static __inline__ void input_NullPacket( input_thread_t * p_input,
107 es_descriptor_t * p_es )
109 data_packet_t * p_pad_data;
110 pes_packet_t * p_pes;
112 if( (p_pad_data = p_input->p_plugin->pf_new_packet(
113 p_input->p_method_data,
114 PADDING_PACKET_SIZE )) == NULL )
116 intf_ErrMsg("Out of memory");
117 p_input->b_error = 1;
121 /* XXX FIXME SARASS TODO: remove the following one-liner kludge when
122 * we have bitstream IV, we won't need it anymore */
123 ((WORD_TYPE *)p_pad_data->p_buffer)++;
125 memset( p_pad_data->p_buffer, 0, PADDING_PACKET_SIZE );
126 p_pad_data->b_discard_payload = 1;
131 p_pes->b_messed_up = 1;
132 p_es->p_last->p_next = p_pad_data;
133 p_es->p_last = p_pad_data;
137 if( (p_pes = p_input->p_plugin->pf_new_pes(
138 p_input->p_method_data )) == NULL )
140 intf_ErrMsg("Out of memory");
141 p_input->b_error = 1;
145 p_pes->p_first = p_pad_data;
146 p_pes->b_messed_up = p_pes->b_discontinuity = 1;
147 input_DecodePES( p_es->p_decoder_fifo, p_pes );
150 p_es->b_discontinuity = 0;