1 /*****************************************************************************
2 * input_ext-plugins.h: structures of the input not exported to other modules,
3 * but exported to plug-ins
4 *****************************************************************************
5 * Copyright (C) 1999, 2000, 2001 VideoLAN
6 * $Id: input_ext-plugins.h,v 1.1 2001/07/17 09:48:07 massiot Exp $
8 * Authors: Christophe Massiot <massiot@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 *****************************************************************************/
26 * Communication plugin -> input
29 /* FIXME: you've gotta move this move this, you've gotta move this move this */
30 #define INPUT_READ_ONCE 7 /* We live in a world dominated by Ethernet. *
31 * Ethernet MTU is 1500 bytes, so in a UDP *
32 * packet we can put : 1500/188 = 7 TS *
33 * packets. Have a nice day and merry Xmas. */
34 #define PADDING_PACKET_SIZE 188 /* Size of the NULL packet inserted in case
35 * of data loss (this should be < 188). */
36 #define PADDING_PACKET_NUMBER 10 /* Number of padding packets top insert to
37 * escape a decoder. */
40 /*****************************************************************************
41 * Prototypes from input_ext-dec.c
42 *****************************************************************************/
43 void InitBitstream ( struct bit_stream_s *, struct decoder_fifo_s *,
44 void (* pf_bitstream_callback)( struct bit_stream_s *,
46 void * p_callback_arg );
47 void NextDataPacket ( struct bit_stream_s * );
49 /*****************************************************************************
50 * Prototypes from input_programs.c
51 *****************************************************************************/
52 int input_InitStream( struct input_thread_s *, size_t );
53 void input_EndStream ( struct input_thread_s * );
54 struct pgrm_descriptor_s * input_FindProgram( struct input_thread_s *, u16 );
55 struct pgrm_descriptor_s * input_AddProgram ( struct input_thread_s *,
57 void input_DelProgram( struct input_thread_s *, struct pgrm_descriptor_s * );
58 struct input_area_s * input_AddArea( struct input_thread_s * );
59 void input_DelArea ( struct input_thread_s *, struct input_area_s * );
60 struct es_descriptor_s * input_FindES( struct input_thread_s *, u16 );
61 struct es_descriptor_s * input_AddES ( struct input_thread_s *,
62 struct pgrm_descriptor_s *, u16,
64 void input_DelES ( struct input_thread_s *, struct es_descriptor_s * );
65 int input_SelectES ( struct input_thread_s *, struct es_descriptor_s * );
66 int input_UnselectES( struct input_thread_s *, struct es_descriptor_s * );
68 /*****************************************************************************
69 * Prototypes from input_dec.c
70 *****************************************************************************/
71 //decoder_capabilities_s * input_ProbeDecoder( void );
72 vlc_thread_t input_RunDecoder( struct decoder_capabilities_s *, void * );
73 void input_EndDecoder( struct input_thread_s *, struct es_descriptor_s * );
74 void input_DecodePES ( struct decoder_fifo_s *, struct pes_packet_s * );
75 void input_EscapeDiscontinuity( struct input_thread_s *,
76 struct pgrm_descriptor_s * );
77 void input_EscapeAudioDiscontinuity( struct input_thread_s *,
78 struct pgrm_descriptor_s * );
80 /*****************************************************************************
81 * Prototypes from input_clock.c
82 *****************************************************************************/
83 void input_ClockInit( struct pgrm_descriptor_s * );
84 int input_ClockManageControl( struct input_thread_s *,
85 struct pgrm_descriptor_s *, mtime_t );
86 void input_ClockManageRef( struct input_thread_s *,
87 struct pgrm_descriptor_s *, mtime_t );
88 mtime_t input_ClockGetTS( struct input_thread_s *,
89 struct pgrm_descriptor_s *, mtime_t );
91 /*****************************************************************************
92 * Create a NULL packet for padding in case of a data loss
93 *****************************************************************************/
94 static __inline__ void input_NullPacket( input_thread_t * p_input,
95 es_descriptor_t * p_es )
97 data_packet_t * p_pad_data;
100 if( (p_pad_data = p_input->pf_new_packet(
101 p_input->p_method_data,
102 PADDING_PACKET_SIZE )) == NULL )
104 intf_ErrMsg("Out of memory");
105 p_input->b_error = 1;
109 memset( p_pad_data->p_buffer, 0, PADDING_PACKET_SIZE );
110 p_pad_data->b_discard_payload = 1;
115 p_pes->b_discontinuity = 1;
116 p_es->p_last->p_next = p_pad_data;
117 p_es->p_last = p_pad_data;
121 if( (p_pes = p_input->pf_new_pes( p_input->p_method_data )) == NULL )
123 intf_ErrMsg("Out of memory");
124 p_input->b_error = 1;
128 p_pes->i_rate = p_input->stream.control.i_rate;
129 p_pes->p_first = p_pad_data;
130 p_pes->b_discontinuity = 1;
131 input_DecodePES( p_es->p_decoder_fifo, p_pes );
137 * Optional netlist management
140 /*****************************************************************************
141 * netlist_t: structure to manage a netlist
142 *****************************************************************************/
143 typedef struct netlist_s
147 size_t i_buffer_size;
150 byte_t * p_buffers; /* Big malloc'ed area */
151 data_packet_t * p_data; /* malloc'ed area */
152 pes_packet_t * p_pes; /* malloc'ed area */
154 /* FIFOs of free packets */
155 data_packet_t ** pp_free_data;
156 pes_packet_t ** pp_free_pes;
157 struct iovec * p_free_iovec;
160 unsigned int i_nb_pes;
161 unsigned int i_nb_data;
164 unsigned int i_data_start, i_data_end;
165 unsigned int i_pes_start, i_pes_end;
167 /* Number of blocs read once by readv */
168 unsigned int i_read_once;
171 /*****************************************************************************
173 *****************************************************************************/
174 int input_NetlistInit( struct input_thread_s *,
175 int i_nb_data, int i_nb_pes,
176 size_t i_buffer_size,
179 struct iovec * input_NetlistGetiovec( void * p_method_data );
180 void input_NetlistMviovec( void * , size_t, struct data_packet_s **);
181 struct data_packet_s * input_NetlistNewPacket( void *, size_t );
182 struct pes_packet_s * input_NetlistNewPES( void * );
183 void input_NetlistDeletePacket( void *, struct data_packet_s * );
184 void input_NetlistDeletePES( void *, struct pes_packet_s * );
185 void input_NetlistEnd( struct input_thread_s * );
189 * Optional MPEG demultiplexing
192 /*****************************************************************************
194 *****************************************************************************/
195 #define TS_PACKET_SIZE 188 /* Size of a TS packet */
196 #define PSI_SECTION_SIZE 4096 /* Maximum size of a PSI section */
198 #define PAT_UNINITIALIZED (1 << 6)
199 #define PMT_UNINITIALIZED (1 << 6)
201 #define PSI_IS_PAT 0x00
202 #define PSI_IS_PMT 0x01
203 #define UNKNOWN_PSI 0xff
205 /*****************************************************************************
207 *****************************************************************************
208 * Describes a PSI section. Beware, it doesn't contain pointers to the TS
209 * packets that contain it as for a PES, but the data themselves
210 *****************************************************************************/
211 typedef struct psi_section_s
213 byte_t buffer[PSI_SECTION_SIZE];
216 u8 i_last_section_number;
218 u16 i_section_length;
219 u16 i_read_in_section;
221 /* the PSI is complete */
222 boolean_t b_is_complete;
224 /* packet missed up ? */
228 boolean_t b_section_complete;
230 /* where are we currently ? */
235 /*****************************************************************************
236 * es_ts_data_t: extension of es_descriptor_t
237 *****************************************************************************/
238 typedef struct es_ts_data_s
240 boolean_t b_psi; /* Does the stream have to be handled by
241 * the PSI decoder ? */
243 int i_psi_type; /* There are different types of PSI */
245 psi_section_t * p_psi_section; /* PSI packets */
248 int i_continuity_counter;
251 /*****************************************************************************
252 * pgrm_ts_data_t: extension of pgrm_descriptor_t
253 *****************************************************************************/
254 typedef struct pgrm_ts_data_s
256 u16 i_pcr_pid; /* PCR ES, for TS streams */
260 /*****************************************************************************
261 * stream_ts_data_t: extension of stream_descriptor_t
262 *****************************************************************************/
263 typedef struct stream_ts_data_s
265 int i_pat_version; /* Current version of the PAT */
268 /*****************************************************************************
269 * stream_ps_data_t: extension of stream_descriptor_t
270 *****************************************************************************/
271 typedef struct stream_ps_data_s
273 boolean_t b_has_PSM; /* very rare, in fact */
278 /* PSM version is 5 bits, so -1 is not a valid value */
279 #define EMPTY_PSM_VERSION -1
282 /*****************************************************************************
284 *****************************************************************************/
285 void input_ParsePES ( struct input_thread_s *, struct es_descriptor_s * );
286 void input_GatherPES ( struct input_thread_s *, struct data_packet_s *,
287 struct es_descriptor_s *, boolean_t, boolean_t );
288 es_descriptor_t * input_ParsePS( struct input_thread_s *,
289 struct data_packet_s * );
290 void input_DemuxPS ( struct input_thread_s *, struct data_packet_s * );
291 void input_DemuxTS ( struct input_thread_s *, struct data_packet_s * );
292 void input_DemuxPSI ( struct input_thread_s *, struct data_packet_s *,
293 struct es_descriptor_s *, boolean_t, boolean_t );