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 1.6 2001/11/25 22:52:21 gbazin 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 *****************************************************************************/
44 void InitBitstream ( struct bit_stream_s *, struct decoder_fifo_s *,
45 void (* pf_bitstream_callback)( struct bit_stream_s *,
47 void * p_callback_arg );
48 void NextDataPacket ( struct bit_stream_s * );
51 /*****************************************************************************
52 * Prototypes from input_programs.c
53 *****************************************************************************/
55 int input_InitStream( struct input_thread_s *, size_t );
56 void input_EndStream ( struct input_thread_s * );
57 struct pgrm_descriptor_s * input_FindProgram( struct input_thread_s *, u16 );
58 struct pgrm_descriptor_s * input_AddProgram ( struct input_thread_s *,
60 void input_DelProgram( struct input_thread_s *, struct pgrm_descriptor_s * );
61 struct input_area_s * input_AddArea( struct input_thread_s * );
62 void input_DelArea ( struct input_thread_s *, struct input_area_s * );
63 struct es_descriptor_s * input_FindES( struct input_thread_s *, u16 );
64 struct es_descriptor_s * input_AddES ( struct input_thread_s *,
65 struct pgrm_descriptor_s *, u16,
67 void input_DelES ( struct input_thread_s *, struct es_descriptor_s * );
68 int input_SelectES ( struct input_thread_s *, struct es_descriptor_s * );
69 int input_UnselectES( struct input_thread_s *, struct es_descriptor_s * );
72 /*****************************************************************************
73 * Prototypes from input_dec.c
74 *****************************************************************************/
76 //decoder_capabilities_s * input_ProbeDecoder( void );
77 vlc_thread_t input_RunDecoder( struct input_thread_s *,
78 struct es_descriptor_s * );
79 void input_EndDecoder( struct input_thread_s *, struct es_descriptor_s * );
80 void input_DecodePES ( struct decoder_fifo_s *, struct pes_packet_s * );
81 void input_EscapeDiscontinuity( struct input_thread_s *,
82 struct pgrm_descriptor_s * );
83 void input_EscapeAudioDiscontinuity( struct input_thread_s * );
86 /*****************************************************************************
87 * Prototypes from input_clock.c
88 *****************************************************************************/
90 void input_ClockInit( struct pgrm_descriptor_s * );
91 int input_ClockManageControl( struct input_thread_s *,
92 struct pgrm_descriptor_s *, mtime_t );
93 void input_ClockManageRef( struct input_thread_s *,
94 struct pgrm_descriptor_s *, mtime_t );
95 mtime_t input_ClockGetTS( struct input_thread_s *,
96 struct pgrm_descriptor_s *, mtime_t );
99 /*****************************************************************************
100 * Create a NULL packet for padding in case of a data loss
101 *****************************************************************************/
102 static __inline__ void input_NullPacket( input_thread_t * p_input,
103 es_descriptor_t * p_es )
105 data_packet_t * p_pad_data;
106 pes_packet_t * p_pes;
108 if( (p_pad_data = p_input->pf_new_packet(
109 p_input->p_method_data,
110 PADDING_PACKET_SIZE )) == NULL )
112 intf_ErrMsg("Out of memory");
113 p_input->b_error = 1;
117 memset( p_pad_data->p_buffer, 0, PADDING_PACKET_SIZE );
118 p_pad_data->b_discard_payload = 1;
123 p_pes->b_discontinuity = 1;
124 p_es->p_last->p_next = p_pad_data;
125 p_es->p_last = p_pad_data;
129 if( (p_pes = p_input->pf_new_pes( p_input->p_method_data )) == NULL )
131 intf_ErrMsg("Out of memory");
132 p_input->b_error = 1;
136 p_pes->i_rate = p_input->stream.control.i_rate;
137 p_pes->p_first = p_pad_data;
138 p_pes->b_discontinuity = 1;
139 input_DecodePES( p_es->p_decoder_fifo, p_pes );
145 * Optional netlist management
148 /*****************************************************************************
149 * netlist_t: structure to manage a netlist
150 *****************************************************************************/
151 typedef struct netlist_s
155 size_t i_buffer_size;
158 byte_t * p_buffers; /* Big malloc'ed area */
159 data_packet_t * p_data; /* malloc'ed area */
160 pes_packet_t * p_pes; /* malloc'ed area */
162 /* FIFOs of free packets */
163 data_packet_t ** pp_free_data;
164 pes_packet_t ** pp_free_pes;
165 struct iovec * p_free_iovec;
168 unsigned int i_nb_iovec;
169 unsigned int i_nb_pes;
170 unsigned int i_nb_data;
173 unsigned int i_iovec_start, i_iovec_end;
174 unsigned int i_data_start, i_data_end;
175 unsigned int i_pes_start, i_pes_end;
177 /* Reference counters for iovec */
178 unsigned int * pi_refcount;
180 /* Number of blocs read once by readv */
181 unsigned int i_read_once;
184 /*****************************************************************************
186 *****************************************************************************/
188 int input_NetlistInit( struct input_thread_s *,
192 size_t i_buffer_size,
195 struct iovec * input_NetlistGetiovec( void * p_method_data );
196 void input_NetlistMviovec( void * , int,
197 struct data_packet_s **);
198 struct data_packet_s * input_NetlistNewPtr( void * );
199 struct data_packet_s * input_NetlistNewPacket( void *, size_t );
200 struct pes_packet_s * input_NetlistNewPES( void * );
201 void input_NetlistDeletePacket( void *,
202 struct data_packet_s * );
203 void input_NetlistDeletePES( void *,
204 struct pes_packet_s * );
205 void input_NetlistEnd( struct input_thread_s * );
210 * Optional MPEG demultiplexing
213 /*****************************************************************************
215 *****************************************************************************/
216 #define TS_PACKET_SIZE 188 /* Size of a TS packet */
217 #define PSI_SECTION_SIZE 4096 /* Maximum size of a PSI section */
219 #define PAT_UNINITIALIZED (1 << 6)
220 #define PMT_UNINITIALIZED (1 << 6)
222 #define PSI_IS_PAT 0x00
223 #define PSI_IS_PMT 0x01
224 #define UNKNOWN_PSI 0xff
226 /*****************************************************************************
228 *****************************************************************************
229 * Describes a PSI section. Beware, it doesn't contain pointers to the TS
230 * packets that contain it as for a PES, but the data themselves
231 *****************************************************************************/
232 typedef struct psi_section_s
234 byte_t buffer[PSI_SECTION_SIZE];
237 u8 i_last_section_number;
239 u16 i_section_length;
240 u16 i_read_in_section;
242 /* the PSI is complete */
243 boolean_t b_is_complete;
245 /* packet missed up ? */
249 boolean_t b_section_complete;
251 /* where are we currently ? */
256 /*****************************************************************************
257 * es_ts_data_t: extension of es_descriptor_t
258 *****************************************************************************/
259 typedef struct es_ts_data_s
261 boolean_t b_psi; /* Does the stream have to be handled by
262 * the PSI decoder ? */
264 int i_psi_type; /* There are different types of PSI */
266 psi_section_t * p_psi_section; /* PSI packets */
269 int i_continuity_counter;
272 /*****************************************************************************
273 * pgrm_ts_data_t: extension of pgrm_descriptor_t
274 *****************************************************************************/
275 typedef struct pgrm_ts_data_s
277 u16 i_pcr_pid; /* PCR ES, for TS streams */
281 /*****************************************************************************
282 * stream_ts_data_t: extension of stream_descriptor_t
283 *****************************************************************************/
284 typedef struct stream_ts_data_s
286 int i_pat_version; /* Current version of the PAT */
289 /*****************************************************************************
290 * stream_ps_data_t: extension of stream_descriptor_t
291 *****************************************************************************/
292 typedef struct stream_ps_data_s
294 boolean_t b_has_PSM; /* very rare, in fact */
299 /* PSM version is 5 bits, so -1 is not a valid value */
300 #define EMPTY_PSM_VERSION -1
303 /*****************************************************************************
305 *****************************************************************************/
307 void input_ParsePES ( struct input_thread_s *, struct es_descriptor_s * );
308 void input_GatherPES ( struct input_thread_s *, struct data_packet_s *,
309 struct es_descriptor_s *, boolean_t, boolean_t );
310 es_descriptor_t * input_ParsePS( struct input_thread_s *,
311 struct data_packet_s * );
312 void input_DemuxPS ( struct input_thread_s *, struct data_packet_s * );
313 void input_DemuxTS ( struct input_thread_s *, struct data_packet_s * );
314 void input_DemuxPSI ( struct input_thread_s *, struct data_packet_s *,
315 struct es_descriptor_s *, boolean_t, boolean_t );