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 1.87 2003/03/24 17:15:29 gbazin 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 *****************************************************************************/
26 #ifndef _VLC_INPUT_EXT_INTF_H
27 #define _VLC_INPUT_EXT_INTF_H 1
30 * Communication input -> interface
33 #define REQUESTED_MPEG 1
34 #define REQUESTED_A52 2
35 #define REQUESTED_LPCM 3
36 #define REQUESTED_DTS 4
37 #define REQUESTED_NOAUDIO 255
39 #define OFFSETTOTIME_MAX_SIZE 10
41 /*****************************************************************************
42 * es_descriptor_t: elementary stream descriptor
43 *****************************************************************************
44 * Describes an elementary stream, and includes fields required to handle and
45 * demultiplex this elementary stream.
46 *****************************************************************************/
47 struct es_descriptor_t
49 uint16_t i_id; /* stream ID for PS, PID for TS */
50 uint8_t i_stream_id; /* stream ID defined in the PES */
51 vlc_fourcc_t i_fourcc; /* stream type */
52 uint8_t i_cat; /* stream category (audio, video, spu) */
53 int i_demux_fd; /* used to store demux device
55 char psz_desc[20]; /* description of ES: audio language
56 * for instance ; NULL if not
59 /* Demultiplexer information */
60 es_sys_t * p_demux_data;
61 pgrm_descriptor_t * p_pgrm; /* very convenient in the demultiplexer */
63 /* PES parser information */
64 pes_packet_t * p_pes; /* Current PES */
65 unsigned int i_pes_real_size; /* as indicated by the header */
67 /* Decoder information */
68 decoder_fifo_t * p_decoder_fifo;
69 void * p_waveformatex;
70 void * p_bitmapinfoheader;
72 count_t c_packets; /* total packets read */
73 count_t c_invalid_packets; /* invalid packets read */
76 /* Special PID values - note that the PID is only on 13 bits, and that values
77 * greater than 0x1fff have no meaning in a stream */
78 #define PROGRAM_ASSOCIATION_TABLE_PID 0x0000
79 #define CONDITIONNAL_ACCESS_TABLE_PID 0x0001 /* not used */
80 #define EMPTY_ID 0xffff /* empty record in a table */
83 /* ES Categories to be used by interface plugins */
84 #define UNKNOWN_ES 0x00
90 /*****************************************************************************
92 *****************************************************************************
93 * Describes a program and list associated elementary streams. It is build by
94 * the PSI decoder upon the informations carried in program map sections
95 *****************************************************************************/
96 struct pgrm_descriptor_t
98 /* Program characteristics */
99 uint16_t i_number; /* program number */
100 uint8_t i_version; /* version number */
101 vlc_bool_t b_is_ok; /* Is the description up to date ? */
103 /* Service Descriptor (program name) - DVB extension */
107 /* Synchronization information */
109 mtime_t cr_ref, sysdate_ref;
110 mtime_t last_cr; /* reference to detect unexpected stream
113 count_t c_average_count;
114 /* counter used to compute dynamic average values */
117 /* Demultiplexer data */
118 pgrm_sys_t * p_demux_data;
120 unsigned int i_es_number; /* size of the following array */
121 es_descriptor_t ** pp_es; /* array of pointers to ES */
126 #define SYNCHRO_START 1
127 #define SYNCHRO_REINIT 2
129 /*****************************************************************************
131 *****************************************************************************
132 * Attributes for current area (title for DVD)
133 *****************************************************************************/
136 /* selected area attributes */
137 unsigned int i_id; /* identificator for area */
138 off_t i_start; /* start offset of area */
139 off_t i_size; /* total size of the area
140 * (in arbitrary units) */
142 /* navigation parameters */
143 off_t i_tell; /* actual location in the area
144 * (in arbitrary units) */
145 off_t i_seek; /* next requested location
146 * (changed by the interface thread */
148 /* area subdivision */
149 unsigned int i_part_nb; /* number of parts (chapter for DVD)*/
150 unsigned int i_part; /* currently selected part */
153 /* offset to plugin related data */
158 * \brief A list of info items.
160 * Composes a linked list of name/value pairs intended to inform the
161 * user about the current stream
164 struct input_info_t {
176 * Pointer to next item in list, or NULL it at end of list
178 input_info_t * p_next;
182 * \brief A list of info categories.
184 * Composes a NULL terminated linked list of categories in which to
185 * place info about the stream.
187 * \see input_InfoCategory
189 struct input_info_category_t {
191 * The name of this category
196 * first element of a linked list containing info items
198 input_info_t * p_info;
201 * Pointer to next element in this list, or NULL if at end of list
203 input_info_category_t * p_next;
206 /*****************************************************************************
207 * stream_descriptor_t
208 *****************************************************************************
209 * Describes a stream and list its associated programs. Build upon
210 * the information carried in program association sections (for instance)
211 *****************************************************************************/
212 struct stream_descriptor_t
214 uint16_t i_stream_id; /* stream id */
215 vlc_bool_t b_changed; /* if stream has been changed,
216 we have to inform the interface */
217 vlc_mutex_t stream_lock; /* to be taken every time you read
218 * or modify stream, pgrm or es */
220 /* Input method data */
221 unsigned int i_method; /* input method for stream: file,
223 vlc_bool_t b_pace_control; /* can we read when we want ? */
224 vlc_bool_t b_seekable; /* can we do lseek() ? */
226 /* if (b_seekable) : */
227 unsigned int i_area_nb;
228 input_area_t ** pp_areas; /* list of areas in stream == offset
229 * interval with own properties */
230 input_area_t * p_selected_area;
231 input_area_t * p_new_area; /* Newly selected area from
234 uint32_t i_mux_rate; /* the rate we read the stream (in
235 * units of 50 bytes/s) ; 0 if undef */
237 /* New status and rate requested by the interface */
238 unsigned int i_new_status, i_new_rate;
239 int b_new_mute; /* int because it can be -1 */
240 vlc_cond_t stream_wait; /* interface -> input in case of a
241 * status change request */
243 /* Demultiplexer data */
244 stream_sys_t * p_demux_data;
246 /* Programs descriptions */
247 unsigned int i_pgrm_number; /* size of the following array */
248 pgrm_descriptor_t ** pp_programs; /* array of pointers to pgrm */
249 pgrm_descriptor_t * p_selected_program; /* currently
251 pgrm_descriptor_t * p_new_program; /* Newly selected program */
252 /* ES descriptions */
253 unsigned int i_es_number;
254 es_descriptor_t ** pp_es; /* carried elementary streams */
255 unsigned int i_selected_es_number;
256 es_descriptor_t ** pp_selected_es; /* ES with a decoder */
257 es_descriptor_t * p_newly_selected_es; /* ES selected from
259 es_descriptor_t * p_removed_es; /* ES removed from the interface */
262 stream_ctrl_t control;
264 /* Optional stream output */
265 sout_instance_t * p_sout;
268 input_info_category_t * p_info;
271 count_t c_packets_read; /* packets read */
272 count_t c_packets_trashed; /* trashed packets */
275 /*****************************************************************************
277 *****************************************************************************
278 * Describes the current position in the stream.
279 *****************************************************************************/
280 struct stream_position_t
282 off_t i_tell; /* actual location in the area (in arbitrary units) */
283 off_t i_size; /* total size of the area (in arbitrary units) */
285 uint32_t i_mux_rate; /* the rate we read the stream (in
286 * units of 50 bytes/s) ; 0 if undef */
289 #define MUTE_NO_CHANGE -1
291 /*****************************************************************************
293 *****************************************************************************
294 * This structure includes all the local static variables of an input thread
295 *****************************************************************************/
296 struct input_thread_t
300 /* Thread properties */
305 ssize_t (* pf_read ) ( input_thread_t *, byte_t *, size_t );
306 int (* pf_set_program )( input_thread_t *, pgrm_descriptor_t * );
307 int (* pf_set_area )( input_thread_t *, input_area_t * );
308 void (* pf_seek ) ( input_thread_t *, off_t );
309 access_sys_t * p_access_data;
311 int i_pts_delay; /* internal caching */
315 int (* pf_demux ) ( input_thread_t * );
316 int (* pf_rewind ) ( input_thread_t * );
317 /* NULL if we don't support going *
318 * backwards (it's gonna be fun) */
319 demux_sys_t * p_demux_data; /* data of the demux */
322 input_buffers_t *p_method_data; /* data of the packet manager */
323 data_buffer_t * p_data_buffer;
324 byte_t * p_current_data;
325 byte_t * p_last_data;
328 /* General stream description */
329 stream_descriptor_t stream;
333 char * psz_dupsource;
342 /* The first figure is a general method that can be used in interface plugins ;
343 * The second figure is a detailed sub-method */
344 #define INPUT_METHOD_NONE 0x0 /* input thread is inactive */
345 #define INPUT_METHOD_FILE 0x10 /* stream is read from file p_source */
346 #define INPUT_METHOD_DISC 0x20 /* stream is read directly from disc */
347 #define INPUT_METHOD_DVD 0x21 /* stream is read from DVD */
348 #define INPUT_METHOD_VCD 0x22 /* stream is read from VCD */
349 #define INPUT_METHOD_NETWORK 0x30 /* stream is read from network */
350 #define INPUT_METHOD_UCAST 0x31 /* UDP unicast */
351 #define INPUT_METHOD_MCAST 0x32 /* UDP multicast */
352 #define INPUT_METHOD_BCAST 0x33 /* UDP broadcast */
353 #define INPUT_METHOD_VLAN_BCAST 0x34 /* UDP broadcast with VLANs */
354 #define INPUT_METHOD_SATELLITE 0x40 /* stream is read from a */
356 #define INPUT_METHOD_SLP 0x50 /* SLP stream */
358 /* Status changing methods */
359 #define INPUT_STATUS_END 0
360 #define INPUT_STATUS_PLAY 1
361 #define INPUT_STATUS_PAUSE 2
362 #define INPUT_STATUS_FASTER 3
363 #define INPUT_STATUS_SLOWER 4
366 #define INPUT_SEEK_SET 0x00
367 #define INPUT_SEEK_CUR 0x01
368 #define INPUT_SEEK_END 0x02
369 #define INPUT_SEEK_BYTES 0x00
370 #define INPUT_SEEK_SECONDS 0x10
371 #define INPUT_SEEK_PERCENT 0x20
373 /*****************************************************************************
375 *****************************************************************************/
376 #define input_CreateThread(a,b) __input_CreateThread(VLC_OBJECT(a),b)
377 input_thread_t * __input_CreateThread ( vlc_object_t *, playlist_item_t * );
378 void input_StopThread ( input_thread_t * );
379 void input_DestroyThread ( input_thread_t * );
381 #define input_SetStatus(a,b) __input_SetStatus(VLC_OBJECT(a),b)
382 VLC_EXPORT( void, __input_SetStatus, ( vlc_object_t *, int ) );
384 #define input_Seek(a,b,c) __input_Seek(VLC_OBJECT(a),b,c)
385 VLC_EXPORT( void, __input_Seek, ( vlc_object_t *, off_t, int ) );
387 #define input_Tell(a,b) __input_Tell(VLC_OBJECT(a),b)
388 VLC_EXPORT( void, __input_Tell, ( vlc_object_t *, stream_position_t * ) );
390 VLC_EXPORT( void, input_DumpStream, ( input_thread_t * ) );
391 VLC_EXPORT( char *, input_OffsetToTime, ( input_thread_t *, char *, off_t ) );
392 VLC_EXPORT( int, input_ToggleES, ( input_thread_t *, es_descriptor_t *, vlc_bool_t ) );
393 VLC_EXPORT( int, input_ChangeArea, ( input_thread_t *, input_area_t * ) );
394 VLC_EXPORT( int, input_ChangeProgram, ( input_thread_t *, uint16_t ) );
396 int input_ToggleGrayscale( input_thread_t * );
397 int input_ToggleMute ( input_thread_t * );
399 #endif /* "input_ext-intf.h" */