1 /*****************************************************************************
2 * input_ext-intf.h: structures of the input exported to the interface
3 * This header provides structures to read the stream descriptors and
4 * control the pace of reading.
5 *****************************************************************************
6 * Copyright (C) 1999, 2000 VideoLAN
7 * $Id: input_ext-intf.h,v 1.51 2001/12/07 16:47:47 jobi Exp $
9 * Authors: Christophe Massiot <massiot@via.ecp.fr>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
27 * Communication input -> interface
29 #define INPUT_MAX_PLUGINS 1
31 #define REQUESTED_MPEG 1
32 #define REQUESTED_AC3 2
33 #define REQUESTED_LPCM 3
34 #define REQUESTED_NOAUDIO 255
36 #define OFFSETTOTIME_MAX_SIZE 10
38 /*****************************************************************************
39 * es_descriptor_t: elementary stream descriptor
40 *****************************************************************************
41 * Describes an elementary stream, and includes fields required to handle and
42 * demultiplex this elementary stream.
43 *****************************************************************************/
44 struct decoder_fifo_s; /* defined in input_ext-dec.h */
45 struct pgrm_descriptor_s;
47 typedef struct es_descriptor_s
49 u16 i_id; /* stream ID for PS, PID for TS */
50 u8 i_stream_id; /* stream ID defined in the PES */
51 u8 i_type; /* stream type */
52 boolean_t b_audio; /* is the stream an audio stream that
53 * will need to be discarded with
54 * fast forward and slow motion ? */
55 u8 i_cat; /* stream category: video, audio,
58 char psz_desc[20]; /* description of ES: audio language
59 * for instance ; NULL if not
62 /* Demultiplexer information */
64 struct pgrm_descriptor_s *
65 p_pgrm; /* very convenient in the demultiplexer */
67 /* PES parser information */
68 struct pes_packet_s * p_pes; /* Current PES */
69 struct data_packet_s * p_last; /* The last packet gathered at present */
70 int i_pes_real_size; /* as indicated by the header */
72 /* Decoder information */
73 struct decoder_fifo_s * p_decoder_fifo;
74 vlc_thread_t thread_id; /* ID of the decoder */
76 count_t c_packets; /* total packets read */
77 count_t c_invalid_packets; /* invalid packets read */
79 /* Module properties */
80 struct module_s * p_module;
81 struct decoder_config_s * p_config;
85 /* Special PID values - note that the PID is only on 13 bits, and that values
86 * greater than 0x1fff have no meaning in a stream */
87 #define PROGRAM_ASSOCIATION_TABLE_PID 0x0000
88 #define CONDITIONNAL_ACCESS_TABLE_PID 0x0001 /* not used */
89 #define EMPTY_ID 0xffff /* empty record in a table */
92 /* ES Categories to be used by interface plugins */
97 #define UNKNOWN_ES 0xFF
98 /*****************************************************************************
100 *****************************************************************************
101 * Describes a program and list associated elementary streams. It is build by
102 * the PSI decoder upon the informations carried in program map sections
103 *****************************************************************************/
104 typedef struct pgrm_descriptor_s
106 /* Program characteristics */
107 u16 i_number; /* program number */
108 u8 i_version; /* version number */
109 boolean_t b_is_ok; /* Is the description up to date ? */
111 /* Service Descriptor (program name) - DVB extension */
115 /* Synchronization information */
117 mtime_t cr_ref, sysdate_ref;
118 mtime_t last_cr; /* reference to detect unexpected stream
121 count_t c_average_count;
122 /* counter used to compute dynamic average values */
125 /* Demultiplexer data */
128 int i_es_number; /* size of the following array */
129 es_descriptor_t ** pp_es; /* array of pointers to ES */
134 #define SYNCHRO_START 1
135 #define SYNCHRO_REINIT 2
137 /*****************************************************************************
139 *****************************************************************************
140 * Attributes for current area (title for DVD)
141 *****************************************************************************/
142 typedef struct input_area_s
144 /* selected area attributes */
145 int i_id; /* identificator for area */
146 off_t i_start; /* start offset of area */
147 off_t i_size; /* total size of the area
148 * (in arbitrary units) */
150 /* navigation parameters */
151 off_t i_tell; /* actual location in the area
152 * (in arbitrary units) */
153 off_t i_seek; /* next requested location
154 * (changed by the interface thread */
156 /* area subdivision */
157 int i_part_nb; /* number of parts (chapter for DVD)*/
158 int i_part; /* currently selected part */
160 int i_angle_nb; /* number of angles/title units */
163 /* offset to plugin related data */
167 /*****************************************************************************
168 * stream_descriptor_t
169 *****************************************************************************
170 * Describes a stream and list its associated programs. Build upon
171 * the information carried in program association sections (for instance)
172 *****************************************************************************/
173 typedef struct stream_descriptor_s
175 u16 i_stream_id; /* stream id */
176 boolean_t b_changed; /* if stream has been changed,
177 we have to inform the interface */
178 vlc_mutex_t stream_lock; /* to be taken every time you read
179 * or modify stream, pgrm or es */
181 /* Input method data */
182 int i_method; /* input method for stream: file,
184 boolean_t b_pace_control; /* can we read when we want ? */
185 boolean_t b_seekable; /* can we do lseek() ? */
187 /* if (b_seekable) : */
189 input_area_t ** pp_areas; /* list of areas in stream == offset
190 * interval with own properties */
191 input_area_t * p_selected_area;
192 input_area_t * p_new_area; /* Newly selected area from
195 u32 i_mux_rate; /* the rate we read the stream (in
196 * units of 50 bytes/s) ; 0 if undef */
198 /* New status and rate requested by the interface */
199 int i_new_status, i_new_rate;
200 int b_new_mute; /* int because it can be -1 */
201 vlc_cond_t stream_wait; /* interface -> input in case of a
202 * status change request */
204 /* Demultiplexer data */
207 /* Programs descriptions */
208 int i_pgrm_number; /* size of the following array */
209 pgrm_descriptor_t ** pp_programs; /* array of pointers to pgrm */
210 pgrm_descriptor_t * p_selected_program; /* currently
212 pgrm_descriptor_t * p_new_program; /* Newly selected program */
213 /* ES descriptions */
215 es_descriptor_t ** pp_es; /* carried elementary streams */
216 int i_selected_es_number;
217 es_descriptor_t ** pp_selected_es; /* ES with a decoder */
218 es_descriptor_t * p_newly_selected_es; /* ES selected from
220 es_descriptor_t * p_removed_es; /* ES removed from the interface */
224 stream_ctrl_t control;
227 count_t c_packets_read; /* packets read */
228 count_t c_packets_trashed; /* trashed packets */
229 } stream_descriptor_t;
231 #define MUTE_NO_CHANGE -1
233 /*****************************************************************************
235 *****************************************************************************
236 * This structure includes all the local static variables of an input thread
237 *****************************************************************************/
238 struct vout_thread_s;
241 typedef struct input_thread_s
243 /* Thread properties and locks */
244 boolean_t b_die; /* 'die' flag */
247 vlc_thread_t thread_id; /* id for thread functions */
248 int * pi_status; /* temporary status flag */
251 struct module_s * p_input_module;
254 void (* pf_init)( struct input_thread_s * );
255 void (* pf_open)( struct input_thread_s * );
256 void (* pf_close)( struct input_thread_s * );
257 void (* pf_end)( struct input_thread_s * );
258 void (* pf_init_bit_stream)( struct bit_stream_s *,
259 struct decoder_fifo_s *,
260 void (* pf_bitstream_callback)( struct bit_stream_s *,
264 /* Read & Demultiplex */
265 int (* pf_read)( struct input_thread_s *,
266 struct data_packet_s * pp_packets[] );
267 void (* pf_demux)( struct input_thread_s *,
268 struct data_packet_s * );
270 /* Packet management facilities */
271 struct data_packet_s *(*pf_new_packet)( void *, size_t );
272 struct pes_packet_s *(* pf_new_pes)( void * );
273 void (* pf_delete_packet)( void *,
274 struct data_packet_s * );
275 void (* pf_delete_pes)( void *, struct pes_packet_s * );
277 /* Stream control capabilities */
278 int (* pf_set_program)( struct input_thread_s *,
279 struct pgrm_descriptor_s * );
280 int (* pf_set_area)( struct input_thread_s *,
281 struct input_area_s * );
282 int (* pf_rewind)( struct input_thread_s * );
283 /* NULL if we don't support going *
284 * backwards (it's gonna be fun) */
285 void (* pf_seek)( struct input_thread_s *, off_t );
289 int i_handle; /* socket or file descriptor */
290 FILE * p_stream; /* if applicable */
291 void * p_handle; /* if i_handle isn't suitable */
292 int i_read_once; /* number of packet read by
294 void * p_method_data; /* data of the packet manager */
295 void * p_plugin_data; /* data of the plugin */
297 /* General stream description */
298 stream_descriptor_t stream; /* PAT tables */
304 /* The first figure is a general method that can be used in interface plugins ;
305 * The second figure is a detailed sub-method */
306 #define INPUT_METHOD_NONE 0x0 /* input thread is inactive */
307 #define INPUT_METHOD_FILE 0x10 /* stream is read from file p_source */
308 #define INPUT_METHOD_DISC 0x20 /* stream is read directly from disc */
309 #define INPUT_METHOD_DVD 0x21 /* stream is read from DVD */
310 #define INPUT_METHOD_VCD 0x22 /* stream is read from VCD */
311 #define INPUT_METHOD_NETWORK 0x30 /* stream is read from network */
312 #define INPUT_METHOD_UCAST 0x31 /* UDP unicast */
313 #define INPUT_METHOD_MCAST 0x32 /* UDP multicast */
314 #define INPUT_METHOD_BCAST 0x33 /* UDP broadcast */
315 #define INPUT_METHOD_VLAN_BCAST 0x34 /* UDP broadcast with VLANs */
318 /* Status changing methods */
319 #define INPUT_STATUS_END 0
320 #define INPUT_STATUS_PLAY 1
321 #define INPUT_STATUS_PAUSE 2
322 #define INPUT_STATUS_FASTER 3
323 #define INPUT_STATUS_SLOWER 4
325 /*****************************************************************************
327 *****************************************************************************/
329 struct input_thread_s * input_CreateThread ( struct playlist_item_s *,
331 void input_DestroyThread( struct input_thread_s *, int *pi_status );
333 void input_SetStatus( struct input_thread_s *, int );
334 void input_Seek ( struct input_thread_s *, off_t );
335 void input_DumpStream( struct input_thread_s * );
336 char * input_OffsetToTime( struct input_thread_s *, char * psz_buffer, off_t );
337 int input_ChangeES ( struct input_thread_s *, struct es_descriptor_s *, u8 );
338 int input_ToggleES ( struct input_thread_s *,
339 struct es_descriptor_s *,
341 int input_ChangeArea( struct input_thread_s *, struct input_area_s * );
342 int input_ToggleGrayscale( struct input_thread_s * );
343 int input_ToggleMute( struct input_thread_s * );
344 int input_SetSMP( struct input_thread_s *, int );