spandsp: t30_dis_dtc_dcs_bits.h Source File

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t30_dis_dtc_dcs_bits.h
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1/*
2 * SpanDSP - a series of DSP components for telephony
3 *
4 * t30_dis_dtc_dcs_bits.h - ITU T.30 fax control bits definitions
5 *
6 * Written by Steve Underwood <steveu@coppice.org>
7 *
8 * Copyright (C) 2009 Steve Underwood
9 *
10 * All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Lesser General Public License version 2.1,
14 * as published by the Free Software Foundation.
15 *
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 Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26/*! \file */
27
28#if !defined(_SPANDSP_PRIVATE_T30_DIS_DTC_DCS_BITS_H_)
29#define _SPANDSP_PRIVATE_T30_DIS_DTC_DCS_BITS_H_
30
31/* Indicates that the terminal has the Simple mode capability defined in ITU-T Rec. T.37.
32 Internet address signals CIA, TSA or CSA can be sent and received. The recipient terminal
33 may process or ignore this signal. */
34#define T30_DIS_BIT_T37 1
35#define T30_DCS_BIT_T37 1
36
37/* Indicates that the terminal has the capability to communicate using ITU-T Rec. T.38.
38 Internet address signals CIA, TSA or CSA can be sent and received. The recipient terminal
39 may process or ignore this signal. */
40#define T30_DIS_BIT_T38 3
41#define T30_DCS_BIT_T38 3
42
43/* Bit 4 set to "1" indicates 3rd Generation Mobile Network Access to the GSTN Connection.
44 Bit 4 set to "0" conveys no information about the type of connection. */
45#define T30_DIS_BIT_3G_MOBILE 4
46#define T30_DCS_BIT_3G_MOBILE 4
47
48/* When ISDN mode is used, in DIS/DTC bit 6 shall be set to "0". */
49#define T30_DIS_BIT_V8_CAPABILITY 6
50
51/* When ISDN mode is used, in DIS/DTC bit 7 shall be set to "0". */
52#define T30_DIS_BIT_64_OCTET_ECM_FRAMES_PREFERRED 7
53
54/* Bit 9 indicates that there is a facsimile document ready to be polled from the answering
55 terrminal. It is not an indication of a capability. */
56#define T30_DIS_BIT_READY_TO_TRANSMIT_FAX_DOCUMENT 9
57
58/* In DIS/DTC bit 10 indicates that the answering terminal has receiving capabilities.
59 In DCS it is a command to the receiving terminal to set itself in the receive mode. */
60#define T30_DIS_BIT_READY_TO_RECEIVE_FAX_DOCUMENT 10
61#define T30_DCS_BIT_RECEIVE_FAX_DOCUMENT 10
62
63/* Bits 11, 12, 13, 14 - modem type */
64
65#define T30_DIS_BIT_200_200_CAPABLE 15
66#define T30_DCS_BIT_200_200 15
67
68#define T30_DIS_BIT_2D_CAPABLE 16
69#define T30_DCS_BIT_2D_MODE 16
70
71/* Standard facsimile terminals conforming to ITU-T Rec. T.4 must have the following capability:
72 Paper length = 297 mm. */
73
74/* Bits 17, 18 - recording width */
75
76/* Bits 19, 20 - paper length */
77
78/* Bits 21, 22, 23 - min scan line time */
79
80/* When ISDN mode is used, in DIS/DTC bits 21 to 23 shall be set to "1". */
81
82#define T30_DIS_BIT_UNCOMPRESSED_CAPABLE 26
83#define T30_DCS_BIT_UNCOMPRESSED_MODE 26
84
85/* When ISDN mode is used, in DIS/DTC bit 27 shall be set to "1". */
86#define T30_DIS_BIT_ECM_CAPABLE 27
87#define T30_DCS_BIT_ECM 27
88
89/* The value of bit 28 in the DCS command is only valid when ECM is selected. */
90#define T30_DCS_BIT_64_OCTET_ECM_FRAMES 28
91
92/* The value of bit 31 in the DCS command is only valid when ECM is selected. */
93#define T30_DIS_BIT_T6_CAPABLE 31
94#define T30_DCS_BIT_T6_MODE 31
95
96#define T30_DIS_BIT_FNV_CAPABLE 33
97#define T30_DCS_BIT_FNV_CAPABLE 33
98
99#define T30_DIS_BIT_MULTIPLE_SELECTIVE_POLLING_CAPABLE 34
100
101#define T30_DIS_BIT_POLLED_SUBADDRESSING_CAPABLE 35
102
103#define T30_DIS_BIT_T43_CAPABLE 36
104#define T30_DCS_BIT_T43_MODE 36
105
106#define T30_DIS_BIT_PLANE_INTERLEAVE_CAPABLE 37
107#define T30_DCS_BIT_PLANE_INTERLEAVE 37
108
109#define T30_DIS_BIT_G726_CAPABLE 38
110#define T30_DCS_BIT_G726 38
111
112#define T30_DIS_BIT_200_400_CAPABLE 41
113#define T30_DCS_BIT_200_400 41
114
115#define T30_DIS_BIT_300_300_CAPABLE 42
116#define T30_DCS_BIT_300_300 42
117
118#define T30_DIS_BIT_400_400_CAPABLE 43
119#define T30_DCS_BIT_400_400 43
120
121/* Bits 44 and 45 are used only in conjunction with bits 15 and 43. Bit 44 in DCS, when used,
122 shall correctly indicate the resolution of the transmitted document, which means that bit 44 in DCS may
123 not always match the indication of bits 44 and 45 in DIS/DTC. Cross selection will cause the distortion
124 and reduction of reproducible area.
125 If a receiver indicates in DIS that it prefers to receive metric-based information, but the transmitter has
126 only the equivalent inch-based information (or vice versa), then communication shall still take place.
127 Bits 44 and 45 do not require the provision of any additional features on the terminal to
128 indicate to the sending or receiving user whether the information was transmitted or received on a metric-metric,
129 inch-inch, metric-inch, inch-metric basis. */
130
131#define T30_DIS_BIT_INCH_RESOLUTION_PREFERRED 44
132#define T30_DCS_BIT_INCH_RESOLUTION 44
133
134#define T30_DIS_BIT_METRIC_RESOLUTION_PREFERRED 45
135
136#define T30_DIS_BIT_MIN_SCAN_TIME_HALVES 46
137
138#define T30_DIS_BIT_SELECTIVE_POLLING_CAPABLE 47
139
140#define T30_DIS_BIT_SUBADDRESSING_CAPABLE 49
141#define T30_DCS_BIT_SUBADDRESS_TRANSMISSION 49
142
143#define T30_DIS_BIT_PASSWORD 50
144#define T30_DCS_BIT_SENDER_ID_TRANSMISSION 50
145
146/* Bit 51 indicates that there is a data file ready to be polled from the answering terminal. It is
147 not an indication of a capability. This bit is used in conjunction with bits 53, 54, 55 and 57. */
148#define T30_DIS_BIT_READY_TO_TRANSMIT_DATA_FILE 51
149
150/* The binary file transfer protocol is described in ITU-T Rec. T.434. */
151#define T30_DIS_BIT_BFT_CAPABLE 53
152#define T30_DCS_BIT_BFT 53
153
154#define T30_DIS_BIT_DTM_CAPABLE 54
155#define T30_DCS_BIT_DTM 54
156
157#define T30_DIS_BIT_EDI_CAPABLE 55
158#define T30_DCS_BIT_EDI 55
159
160#define T30_DIS_BIT_BTM_CAPABLE 57
161#define T30_DCS_BIT_BTM 57
162
163/* Bit 59 indicates that there is a character-coded or mixed-mode document ready to be polled
164 from the answering terminal. It is not an indication of a capability. This bit is used in
165 conjunction with bits 60, 62 and 65. */
166#define T30_DIS_BIT_READY_TO_TRANSMIT_MIXED_MODE_DOCUMENT 59
167
168#define T30_DIS_BIT_CHARACTER_MODE 60
169#define T30_DCS_BIT_CHARACTER_MODE 60
170
171#define T30_DIS_BIT_MIXED_MODE 62
172#define T30_DCS_BIT_MIXED_MODE 62
173
174#define T30_DIS_BIT_PROCESSABLE_MODE_26 65
175
176#define T30_DIS_BIT_DIGITAL_NETWORK_CAPABLE 66
177#define T30_DCS_BIT_DIGITAL_NETWORK_CAPABLE 66
178
179#define T30_DIS_BIT_DUPLEX_CAPABLE 67
180#define T30_DCS_BIT_DUPLEX_CAPABLE 67
181
182#define T30_DIS_BIT_T81_CAPABLE 68
183#define T30_DCS_BIT_FULL_COLOUR_MODEX 68
184
185#define T30_DIS_BIT_FULL_COLOUR_CAPABLE 69
186#define T30_DCS_BIT_FULL_COLOUR_MODE 69
187
188/* In a DIS/DTC frame, setting bit 71 to "0" indicates that the called terminal can only accept
189 image data which has been digitized to 8 bits/pel/component for JPEG mode. This is also true for T.43
190 mode if bit 36 is also set to "1". Setting bit 71 to "1" indicates that the called terminal can also accept
191 image data that are digitized to 12 bits/pel/component for JPEG mode. This is also true for T.43 mode if
192 bit 36 is also set to "1". In a DCS frame, setting bit 71 to "0" indicates that the calling terminal's image
193 data are digitized to 8 bits/pel/component for JPEG mode. This is also true for T.43 mode if bit 36 is also
194 set to "1". Setting bit 71 to "1" indicates that the calling terminal transmits image data which has been
195 digitized to 12 bits/pel/component for JPEG mode. This is also true for T.43 mode if bit 36 is also set
196 to "1". */
197#define T30_DIS_BIT_12BIT_CAPABLE 71
198#define T30_DCS_BIT_12BIT_COMPONENT 71
199
200#define T30_DIS_BIT_NO_SUBSAMPLING 73
201#define T30_DCS_BIT_NO_SUBSAMPLING 73
202
203#define T30_DIS_BIT_CUSTOM_ILLUMINANT 74
204#define T30_DCS_BIT_CUSTOM_ILLUMINANT 74
205
206#define T30_DIS_BIT_CUSTOM_GAMUT_RANGE 75
207#define T30_DCS_BIT_CUSTOM_GAMUT_RANGE 75
208
209#define T30_DIS_BIT_NORTH_AMERICAN_LETTER_CAPABLE 76
210#define T30_DCS_BIT_NORTH_AMERICAN_LETTER 76
211
212#define T30_DIS_BIT_NORTH_AMERICAN_LEGAL_CAPABLE 77
213#define T30_DCS_BIT_NORTH_AMERICAN_LEGAL 77
214
215#define T30_DIS_BIT_T85_CAPABLE 78
216#define T30_DCS_BIT_T85_MODE 78
217
218#define T30_DIS_BIT_T85_L0_CAPABLE 79
219#define T30_DCS_BIT_T85_L0_MODE 79
220
221/* In a DIS/DTC frame, setting bit 97 to "0" indicates that the called terminal does not have the
222 capability to accept 300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm
223 resolutions for colour/gray-scale images or T.44 Mixed Raster Content (MRC) mask layer.
224
225 Setting bit 97 to "1" indicates that the called terminal does have the capability to accept
226 300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions for
227 colour/gray-scale images and MRC mask layer. Bit 97 is valid only when bits 68 and 42 or 43
228 (300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm) are set to "1".
229
230 In a DCS frame, setting bit 97 to "0" indicates that the calling terminal does not use
231 300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions
232 for colour/gray-scale images and mask layer.
233
234 Setting bit 97 to "1" indicates that the calling terminal uses 300 pels/25.4 mm x 300 lines/25.4 mm
235 or 400 pels/25.4 mm x 400 lines/25.4 mm resolutions for colour/gray-scale images and MRC mask layer.
236 Bit 97 is valid only when bits 68 and 42 or 43 (300 pels/25.4 mm x 300 lines/25.4 mm and
237 400 pels/25.4 mm x 400 lines/25.4 mm) are set to "1".
238
239 In a DIS/DTC frame, combinations of bit 42, bit 43 and bit 97 indicate that the called terminal
240 has higher resolution capabilities as follows:
241
242 Resolution capabilities (pels/25.4 mm)
243 DIS/DTC Monochrome Colour/gray-scale
244 42 43 97 300 x 300 400 x 400 300 x 300 400 x 400
245 0 0 0 no no no no
246 1 0 0 yes no no no
247 0 1 0 no yes no no
248 1 1 0 yes yes no no
249 0 0 1 (invalid)
250 1 0 1 yes no yes no
251 0 1 1 no yes no yes
252 1 1 1 yes yes yes yes
253 "yes" means that the called terminal has the corresponding capability.
254 "no" means that the called terminal does not have the corresponding capability. */
255#define T30_DIS_BIT_COLOUR_GREY_300_300_400_400_CAPABLE 97
256#define T30_DCS_BIT_COLOUR_GREY_300_300_400_400 97
257
258/* In a DIS/DTC frame, setting bit 98 to "0" indicates that the called terminal does not have the
259 capability to accept 100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale
260 images. Setting bit 98 to "1" indicates that the called terminal does have the capability to accept
261 100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale images. Bit 98 is valid
262 only when bit 68 is set to "1". In a DCS frame, setting bit 98 to "0" indicates that the calling terminal does
263 not use 100 pels/25.4 mm x 100 lines/25.4 mm spatial resolution for colour or gray-scale images. Setting
264 bit 98 to "1" indicates that the calling terminal uses 100 pels/25.4 mm x 100 lines/25.4 mm spatial
265 resolution for colour or gray-scale images. */
266#define T30_DIS_BIT_COLOUR_GREY_100_100_CAPABLE 98
267#define T30_DCS_BIT_COLOUR_GREY_100_100 98
268
269/* To provide an error recovery mechanism, when PWD/SEP/SUB/SID/PSA/IRA/ISP frames are sent with DCS or DTC,
270 bits 49, 102 and 50 in DCS or bits 47, 101, 50 and 35 in DTC shall be set to "1" with the following
271 meaning:
272 Bit DIS DTC DCS
273 35 Polled SubAddress capability Polled SubAddress transmission Not allowed - set to "0"
274 47 Selective polling capability Selective polling transmission Not allowed - set to "0"
275 49 Subaddressing capability Not allowed (Set to "0") Subaddressing transmission
276 50 Password Password transmission Sender Identification transmission
277 101 Internet Selective Polling Address capability Internet Selective Polling Address transmission Not allowed - set to "0"
278 102 Internet Routing Address capability Not allowed (Set to "0") Internet Routing Address transmission
279
280 Terminals conforming to the 1993 version of T.30 may set the above bits to "0" even though PWD/SEP/SUB
281 frames are transmitted. */
282#define T30_DIS_BIT_INTERNET_SELECTIVE_POLLING_ADDRESS 101
283
284#define T30_DIS_BIT_INTERNET_ROUTING_ADDRESS 102
285#define T30_DCS_BIT_INTERNET_ROUTING_ADDRESS_TRANSMISSION 102
286
287#define T30_DIS_BIT_600_600_CAPABLE 105
288#define T30_DCS_BIT_600_600 105
289
290#define T30_DIS_BIT_1200_1200_CAPABLE 106
291#define T30_DCS_BIT_1200_1200 106
292
293#define T30_DIS_BIT_300_600_CAPABLE 107
294#define T30_DCS_BIT_300_600 107
295
296#define T30_DIS_BIT_400_800_CAPABLE 108
297#define T30_DCS_BIT_400_800 108
298
299#define T30_DIS_BIT_600_1200_CAPABLE 109
300#define T30_DCS_BIT_600_1200 109
301
302#define T30_DIS_BIT_COLOUR_GREY_600_600_CAPABLE 110
303#define T30_DCS_BIT_COLOUR_GREY_600_600 110
304
305#define T30_DIS_BIT_COLOUR_GREY_1200_1200_CAPABLE 111
306#define T30_DCS_BIT_COLOUR_GREY_1200_1200 111
307
308#define T30_DIS_BIT_ALTERNATE_DOUBLE_SIDED_CAPABLE 113
309#define T30_DCS_BIT_ALTERNATE_DOUBLE_SIDED_CAPABLE 113
310
311#define T30_DIS_BIT_CONTINUOUS_DOUBLE_SIDED_CAPABLE 114
312#define T30_DCS_BIT_CONTINUOUS_DOUBLE_SIDED_CAPABLE 114
313
314#define T30_DIS_BIT_BLACK_AND_WHITE_MRC 115
315
316#define T30_DIS_BIT_T45_CAPABLE 116
317#define T30_DCS_BIT_T45_MODE 116
318
319/* This bit defines the available colour space, when bit 92, 93 or 94 is set to "1".
320 Available colour space for all combinations of bits 92, 93, 94 and 119 are shown in the following table.
321 It should be noted that terminals which conform to the 2003 and earlier versions of this Recommendation
322 will send LAB with "1" in bit 92, 93 or 94 even if bit 119 is set to "1".
323
324 Available colour space for DIS/DTC bits 92, 93, 94 and 119
325
326 92 93 94 119 Mode of T.44 Available colour space
327 0 0 0 x Not available -
328 1 0 0 0 Mode 1 LAB only
329 1 0 0 1 Mode 1 YCC only
330 x 1 x 0 Mode 2 or higher LAB only
331 x x 1 0 Mode 2 or higher LAB only
332 x 1 x 1 Mode 2 or higher LAB and YCC
333 x x 1 1 Mode 2 or higher LAB and YCC
334
335 Colour space for DCS bits 92, 93, 94 and 119
336
337 92 93 94 119 Mode of T.44 Colour space
338 0 0 0 x* Not available -
339 1 0 0 0 Mode 1 LAB
340 1 0 0 1 Mode 1 YCC
341 x 1 x 0 Mode 2 or higher LAB
342 x x 1 0 Mode 2 or higher LAB
343 x 1 x 1 Mode 2 or higher YCC or mixing of YCC and LAB
344 x x 1 1 Mode 2 or higher YCC or mixing of YCC and LAB */
345#define T30_DIS_BIT_T44_COLOUR_SPACE 119
346#define T30_DCS_BIT_T44_COLOUR_SPACE 119
347
348/* Can only be set in the communication through the T.38 gateway, to cope with delay of network.
349 T.x timer (12+-1s) should be used after emitting RNR or TNR. However, after receiving
350 PPS signal in ECM mode, T.5 timer should be used. */
351#define T30_DIS_BIT_T38_FLOW_CONTROL_CAPABLE 121
352#define T30_DCS_BIT_T38_FLOW_CONTROL_CAPABLE 121
353
354/* For resolutions greater than 200 lines/25.4 mm, 4.2.1.1/T.4 specifies the use of specific K
355 factors for each standardized vertical resolution. To ensure backward compatibility with earlier
356 versions of ITU-T Rec. T.4, bit 122 indicates when such K factors are being used. */
357#define T30_DIS_BIT_K_GREATER_THAN_4 122
358
359/* This bit should be set to "1" if the fax device is an Internet-Aware Fax Device as defined in
360 ITU-T Rec. T.38 and if it is not affected by the data signal rate indicated by the DIS and DTC
361 signals when communicating with another Internet-Aware Fax Device operating in T.38 mode. This
362 bit shall not be used in GSTN mode. */
363#define T30_DIS_BIT_T38_FAX_CAPABLE 123
364/* This bit should be set to "1" if the fax device elects to operate in an Internet-Aware Fax mode
365 as defined in ITU-T Rec. T.38 in response to a device which has set the related DIS bit to "1".
366 When this bit is set to "1", the data signal rate of the modem (bits 11-14) should be set to "0". */
367#define T30_DCS_BIT_T38_FAX_MODE 123
368
369/* When either bit of 31, 36, 38, 51, 53, 54, 55, 57, 59, 60, 62, 65, 68, 78, 79, 115, 116 and 127 is
370 set to "1", ECM must be used. If the value of bit field 92 to 94 is non-zero, then ECM must be used.
371
372 Annex K describes the optional continuous-tone colour and gray scale images mode
373 (sYCC-JPEG mode) protocol. When bit 127 in DIS/DTC frame is set to "1", the called terminal has the
374 capability to accept sYCC-JPEG mode. This is defined with complete independent in the colour space
375 CIELAB. In addition, when bit 127 in DCS frame is set to "1", ECM must be used and bits 15, 17, 18,
376 19, 20, 41, 42, 43, 45, 46, 68, 69, 71, 73, 74, 75, 76, 77, 97, 98, 105, 106, 107, 108,
377 109, 110 and 111 in DCS frame are "Don't care", and should be set to "0". In the case of
378 transmission of multiple images, a post message signal PPS-MPS between pages, PPS-NULL between
379 partial pages and PPS-EOP following the last page should be sent from the calling terminal to the
380 called terminal. */
381#define T30_DIS_BIT_SYCC_T81_CAPABLE 127
382#define T30_DCS_BIT_SYCC_T81_MODE 127
383
384#endif
385/*- End of file ------------------------------------------------------------*/