aboutsummaryrefslogtreecommitdiff
path: root/readsfv~.c
blob: e3248acdfab23d3f7e94685fa3240768ad1e3d10 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
#ifndef _WIN32
/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */

/* this file contains, first, a collection of soundfile access routines, a
sort of soundfile library.  Second, the "soundfiler" object is defined which
uses the routines to read or write soundfiles, synchronously, from garrays.
These operations are not to be done in "real time" as they may have to wait
for disk accesses (even the write routine.)  Finally, the realtime objects
readsf~ and writesf~ are defined which confine disk operations to a separate
thread so that they can be used in real time.  The real-time disk access
objects are available for linux only so far, although they could be compiled
for Windows if someone were willing to find a Pthreads package for it. */

/* this is a partial copy of d_soundfile, with some hacking:
	1: a fix in soundfiler to compute the normalization factor only on
		the samples we want to write on the disk...
	2: a version of readsf~ that works with a (positive) speed parameter.

	Antoine Rousseau
*/

#include <pthread.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#include <fcntl.h>
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>

#include "m_pd.h"

#define MAXSFCHANS 4


/***************** soundfile header structures ************************/

typedef unsigned short uint16;
typedef unsigned long uint32;

#define FORMAT_WAVE 0
#define FORMAT_AIFF 1
#define FORMAT_NEXT 2

/* the NeXTStep sound header structure; can be big or little endian  */

typedef struct _nextstep
{
    char ns_fileid[4]; 	    /* magic number '.snd' if file is big-endian */
    uint32 ns_onset; 	    /* byte offset of first sample */
    uint32 ns_length;	    /* length of sound in bytes */
    uint32 ns_format;        /* format; see below */
    uint32 ns_sr;    	    /* sample rate */
    uint32 ns_nchans;	    /* number of channels */
    char ns_info[4];   	    /* comment */
} t_nextstep;

#define NS_FORMAT_LINEAR_16	3
#define NS_FORMAT_LINEAR_24	4
#define NS_FORMAT_FLOAT         6
#define SCALE (1./(1024. * 1024. * 1024. * 2.))

/* the WAVE header.  All Wave files are little endian.  We assume
    the "fmt" chunk comes first which is usually the case but perhaps not
    always; same for AIFF and the "COMM" chunk.   */

typedef unsigned word;
typedef unsigned long dword;

typedef struct _wave
{
    char  w_fileid[4];	    	    /* chunk id 'RIFF'            */
    uint32 w_chunksize;     	    /* chunk size                 */
    char  w_waveid[4];	    	    /* wave chunk id 'WAVE'       */
    char  w_fmtid[4];	    	    /* format chunk id 'fmt '     */
    uint32 w_fmtchunksize;   	    /* format chunk size          */
    uint16  w_fmttag;	    	    /* format tag, 1 for PCM      */
    uint16  w_nchannels;    	    /* number of channels         */
    uint32 w_samplespersec;  	    /* sample rate in hz          */
    uint32 w_navgbytespersec; 	    /* average bytes per second   */
    uint16  w_nblockalign;    	    /* number of bytes per sample */
    uint16  w_nbitspersample; 	    /* number of bits in a sample */
    char  w_datachunkid[4]; 	    /* data chunk id 'data'       */
    uint32 w_datachunksize;         /* length of data chunk       */
} t_wave;

typedef struct _fmt	    /* format chunk */
{
    uint16 f_fmttag;	    	    /* format tag, 1 for PCM      */
    uint16 f_nchannels;    	    /* number of channels         */
    uint32 f_samplespersec;  	    /* sample rate in hz          */
    uint32 f_navgbytespersec; 	    /* average bytes per second   */
    uint16 f_nblockalign;    	    /* number of bytes per frame  */
    uint16 f_nbitspersample; 	    /* number of bits in a sample */
} t_fmt;

typedef struct _wavechunk	    /* ... and the last two items */
{
    char  wc_id[4]; 	    	    /* data chunk id, e.g., 'data' or 'fmt ' */
    uint32 wc_size;         	    /* length of data chunk       */
} t_wavechunk;

/* the AIFF header.  I'm assuming AIFC is compatible but don't really know
    that. */

typedef struct _datachunk
{
    char  dc_id[4]; 	    	    /* data chunk id 'SSND'       */
    uint32 dc_size;         	    /* length of data chunk       */
} t_datachunk;

//#define CHUNKHDRSIZE sizeof(t_datachunk)

typedef struct _comm
{
    uint16 c_nchannels;	            /* number of channels         */
    uint16 c_nframeshi;    	    /* # of sample frames (hi)    */
    uint16 c_nframeslo;    	    /* # of sample frames (lo)    */
    uint16 c_bitspersamp;  	    /* bits per sample            */
    unsigned char c_samprate[10];   /* sample rate, 80-bit float! */
} t_comm;

/* this version is more convenient for writing them out: */
typedef struct _aiff
{
    char  a_fileid[4];	    	    /* chunk id 'FORM'            */
    uint32 a_chunksize;     	    /* chunk size                 */
    char  a_aiffid[4];	    	    /* aiff chunk id 'AIFF'       */
    char  a_fmtid[4];	    	    /* format chunk id 'COMM'     */
    uint32 a_fmtchunksize;   	    /* format chunk size, 18      */
    uint16 a_nchannels;	            /* number of channels         */
    uint16 a_nframeshi;    	    /* # of sample frames (hi)    */
    uint16 a_nframeslo;    	    /* # of sample frames (lo)    */
    uint16 a_bitspersamp;  	    /* bits per sample            */
    unsigned char a_samprate[10];   /* sample rate, 80-bit float! */
} t_aiff;

#define AIFFHDRSIZE 38	    /* probably not what sizeof() gives */


#define AIFFPLUS (AIFFHDRSIZE + 8)  /* header size including first chunk hdr */

#define WHDR1 sizeof(t_nextstep)
#define WHDR2 (sizeof(t_wave) > WHDR1 ? sizeof (t_wave) : WHDR1)
#define WRITEHDRSIZE (AIFFPLUS > WHDR2 ? AIFFPLUS : WHDR2)

#define READHDRSIZE (16 > WHDR2 ? 16 : WHDR2)

#define OBUFSIZE MAXPDSTRING  /* assume MAXPDSTRING is bigger than headers */

#ifdef _WIN32
#include <fcntl.h>
#define BINCREATE _O_WRONLY | _O_CREAT | _O_BINARY | _O_TRUNC |
#else
#define BINCREATE O_WRONLY|O_CREAT|O_TRUNC
#endif

/* this routine returns 1 if the high order byte comes at the lower
address on our architecture (big-endianness.).  It's 1 for Motorola,
0 for Intel: */

extern int garray_ambigendian(void);

/* byte swappers */

static uint32 swap4(uint32 n, int doit)
{
    if (doit)
        return (((n & 0xff) << 24) | ((n & 0xff00) << 8) |
                ((n & 0xff0000) >> 8) | ((n & 0xff000000) >> 24));
    else return (n);
}

static uint16 swap2(uint32 n, int doit)
{
    if (doit)
        return (((n & 0xff) << 8) | ((n & 0xff00) >> 8));
    else return (n);
}

static void swapstring(char *foo, int doit)
{
    if (doit)
    {
        char a = foo[0], b = foo[1], c = foo[2], d = foo[3];
        foo[0] = d;
        foo[1] = c;
        foo[2] = b;
        foo[3] = a;
    }
}

/******************** soundfile access routines **********************/

void readsf_banana( void);    /* debugging */

/* This routine opens a file, looks for either a nextstep or "wave" header,
* seeks to end of it, and fills in bytes per sample and number of channels.
* Only 2- and 3-byte fixed-point samples and 4-byte floating point samples
* are supported.  If "headersize" is nonzero, the
* caller should supply the number of channels, endinanness, and bytes per
* sample; the header is ignored.  Otherwise, the routine tries to read the
* header and fill in the properties.
*/

extern int open_soundfile(const char *dirname, const char *filename, int headersize,
                          int *p_bytespersamp, int *p_bigendian, int *p_nchannels, long *p_bytelimit,
                          long skipframes);


static void soundfile_xferin(int sfchannels, int nvecs, float **vecs,
                             long itemsread, unsigned char *buf, int nitems, int bytespersamp,
                             int bigendian)
{
    int i, j;
    unsigned char *sp, *sp2;
    float *fp;
    int nchannels = (sfchannels < nvecs ? sfchannels : nvecs);
    int bytesperframe = bytespersamp * sfchannels;
    for (i = 0, sp = buf; i < nchannels; i++, sp += bytespersamp)
    {
        if (bytespersamp == 2)
        {
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *fp = SCALE * ((sp2[0] << 24) | (sp2[1] << 16));
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *fp = SCALE * ((sp2[1] << 24) | (sp2[0] << 16));
            }
        }
        else if (bytespersamp == 3)
        {
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *fp = SCALE * ((sp2[0] << 24) | (sp2[1] << 16)
                                   | (sp2[2] << 8));
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *fp = SCALE * ((sp2[2] << 24) | (sp2[1] << 16)
                                   | (sp2[0] << 8));
            }
        }
        else if (bytespersamp == 4)
        {
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *(long *)fp = ((sp2[0] << 24) | (sp2[1] << 16)
                                   | (sp2[2] << 8) | sp2[3]);
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + itemsread;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                    *(long *)fp = ((sp2[3] << 24) | (sp2[2] << 16)
                                   | (sp2[1] << 8) | sp2[0]);
            }
        }
    }
    /* zero out other outputs */
    for (i = sfchannels; i < nvecs; i++)
        for (j = nitems, fp = vecs[i]; j--; )
            *fp++ = 0;

}

static void interpolate(int nvec,float **invec,int nin,
                        float **outvec,int nout)
{

    float r=nin/(float)nout;
    int i,j;


    for(i=0; i<nout; i++)
        for(j=0; j<nvec; j++)
            outvec[j][i]=invec[j][(int)(i*r)];

}
/* soundfiler2_write ...

usage: write [flags] filename table ...
flags:
-nframes <frames>
-skip <frames>
-bytes <bytes per sample>
-normalize
-nextstep
-wave
-big
-little
*/

/* the routine which actually does the work should LATER also be called
from garray_write16. */


/* Parse arguments for writing.  The "obj" argument is only for flagging
errors.  For streaming to a file the "normalize", "onset" and "nframes"
arguments shouldn't be set but the calling routine flags this. */

static int soundfiler2_writeargparse(void *obj, int *p_argc, t_atom **p_argv,
                                     t_symbol **p_filesym,
                                     int *p_filetype, int *p_bytespersamp, int *p_swap, int *p_bigendian,
                                     int *p_normalize, long *p_onset, long *p_nframes,float *p_amp)
{
    int argc = *p_argc;
    t_atom *argv = *p_argv;
    int bytespersamp = 2, bigendian = 0,
        endianness = -1, swap, filetype = FORMAT_WAVE, normalize = 0;
    long onset = 0, nframes = 0x7fffffff;
    float amp=1;
    t_symbol *filesym;
    while (argc > 0 && argv->a_type == A_SYMBOL &&
            *argv->a_w.w_symbol->s_name == '-')
    {
        char *flag = argv->a_w.w_symbol->s_name + 1;
        if (!strcmp(flag, "skip"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((onset = argv[1].a_w.w_float) < 0))
                goto usage;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "nframes"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((nframes = argv[1].a_w.w_float) < 0))
                goto usage;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "bytes"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((bytespersamp = argv[1].a_w.w_float) < 2) ||
                    bytespersamp > 4)
                goto usage;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "normalize"))
        {
            normalize = 1;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "amp"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT)
                goto usage;
            amp = argv[1].a_w.w_float;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "wave"))
        {
            filetype = FORMAT_WAVE;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "nextstep"))
        {
            filetype = FORMAT_NEXT;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "aiff"))
        {
            filetype = FORMAT_AIFF;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "big"))
        {
            endianness = 1;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "little"))
        {
            endianness = 1;
            argc -= 1;
            argv += 1;
        }
        else goto usage;
    }
    /* only NextStep handles floating point samples */
    if (bytespersamp == 4)
        filetype = FORMAT_NEXT;

    /* for WAVE force little endian; for nextstep use machine native */
    if (filetype == FORMAT_WAVE)
    {
        bigendian = 0;
        if (endianness == 1)
            pd_error(obj, "WAVE file forced to little endian");
    }
    else if (filetype == FORMAT_AIFF)
    {
        bigendian = 1;
        if (endianness == 0)
            pd_error(obj, "AIFF file forced to big endian");
    }
    else if (endianness == -1)
    {
        bigendian = garray_ambigendian();
    }
    swap = (bigendian != garray_ambigendian());
    if (!argc || argv->a_type != A_SYMBOL)
        goto usage;
    filesym = argv->a_w.w_symbol;
    argc--;
    argv++;

    *p_argc = argc;
    *p_argv = argv;
    *p_filesym = filesym;
    *p_filetype = filetype;
    *p_bytespersamp = bytespersamp;
    *p_swap = swap;
    *p_normalize = normalize;
    *p_onset = onset;
    *p_nframes = nframes;
    *p_bigendian = bigendian;
    *p_amp = amp;
    return (0);
usage:
    return (-1);
}

static int create_soundfile2(t_canvas *canvas, const char *filename,
                             int filetype, int nframes, int bytespersamp,
                             int bigendian, int nchannels, int swap)
{
    char filenamebuf[MAXPDSTRING], buf2[MAXPDSTRING];
    char headerbuf[WRITEHDRSIZE];
    t_wave *wavehdr = (t_wave *)headerbuf;
    t_nextstep *nexthdr = (t_nextstep *)headerbuf;
    t_aiff *aiffhdr = (t_aiff *)headerbuf;
    int fd, headersize = 0;

    strncpy(filenamebuf, filename, MAXPDSTRING-10);
    filenamebuf[MAXPDSTRING-10] = 0;

    if (filetype == FORMAT_NEXT)
    {
        if (strcmp(filenamebuf + strlen(filenamebuf)-4, ".snd"))
            strcat(filenamebuf, ".snd");
        if (bigendian)
            strncpy(nexthdr->ns_fileid, ".snd", 4);
        else strncpy(nexthdr->ns_fileid, "dns.", 4);
        nexthdr->ns_onset = swap4(sizeof(*nexthdr), swap);
        nexthdr->ns_length = 0;
        nexthdr->ns_format = swap4((bytespersamp == 3 ? NS_FORMAT_LINEAR_24 :
                                    (bytespersamp == 4 ? NS_FORMAT_FLOAT : NS_FORMAT_LINEAR_16)), swap);;
        nexthdr->ns_sr = swap4(44100, swap);     /* lie */
        nexthdr->ns_nchans = swap4(nchannels, swap);
        strcpy(nexthdr->ns_info, "Pd ");
        swapstring(nexthdr->ns_info, swap);
        headersize = sizeof(t_nextstep);
    }
    else if (filetype == FORMAT_AIFF)
    {
        long datasize = nframes * nchannels * bytespersamp;
        long longtmp;
        static unsigned char dogdoo[] =
        {0x40, 0x0e, 0xac, 0x44, 0, 0, 0, 0, 0, 0, 'S', 'S', 'N', 'D'};
        if (strcmp(filenamebuf + strlen(filenamebuf)-4, ".aif") &&
                strcmp(filenamebuf + strlen(filenamebuf)-5, ".aiff"))
            strcat(filenamebuf, ".aif");
        strncpy(aiffhdr->a_fileid, "FORM", 4);
        aiffhdr->a_chunksize = swap4(datasize + sizeof(*aiffhdr) + 4, swap);
        strncpy(aiffhdr->a_aiffid, "AIFF", 4);
        strncpy(aiffhdr->a_fmtid, "COMM", 4);
        aiffhdr->a_fmtchunksize = swap4(18, swap);
        aiffhdr->a_nchannels = swap2(nchannels, swap);
        longtmp = swap4(nframes, swap);
        memcpy(&aiffhdr->a_nframeshi, &longtmp, 4);
        aiffhdr->a_bitspersamp = swap2(8 * bytespersamp, swap);
        memcpy(aiffhdr->a_samprate, dogdoo, sizeof(dogdoo));
        longtmp = swap4(datasize, swap);
        memcpy(aiffhdr->a_samprate + sizeof(dogdoo), &longtmp, 4);
        headersize = AIFFPLUS;
    }
    else    /* WAVE format */
    {
        long datasize = nframes * nchannels * bytespersamp;
        if (strcmp(filenamebuf + strlen(filenamebuf)-4, ".wav"))
            strcat(filenamebuf, ".wav");
        strncpy(wavehdr->w_fileid, "RIFF", 4);
        wavehdr->w_chunksize = swap4(datasize + sizeof(*wavehdr) - 8, swap);
        strncpy(wavehdr->w_waveid, "WAVE", 4);
        strncpy(wavehdr->w_fmtid, "fmt ", 4);
        wavehdr->w_fmtchunksize = swap4(16, swap);
        wavehdr->w_fmttag = swap2(1, swap);
        wavehdr->w_nchannels = swap2(nchannels, swap);
        wavehdr->w_samplespersec = swap4(44100, swap);
        wavehdr->w_navgbytespersec = swap4(44100 * nchannels * bytespersamp, swap);
        wavehdr->w_nblockalign = swap2(bytespersamp, swap);
        wavehdr->w_nbitspersample = swap2(8 * bytespersamp, swap);
        strncpy(wavehdr->w_datachunkid, "data", 4);
        wavehdr->w_datachunksize = swap4(datasize, swap);
        headersize = sizeof(t_wave);
    }

    canvas_makefilename(canvas, filenamebuf, buf2, MAXPDSTRING);
    sys_bashfilename(buf2, buf2);
    if ((fd = open(buf2, BINCREATE, 0666)) < 0)
        return (-1);

    if (write(fd, headerbuf, headersize) < headersize)
    {
        close (fd);
        return (-1);
    }
    return (fd);
}

static void soundfile_finishwrite(void *obj, char *filename, int fd,
                                  int filetype, long nframes, long itemswritten, int bytesperframe, int swap)
{
    if (itemswritten < nframes)
    {
        if (nframes < 0x7fffffff)
            pd_error(obj, "soundfiler2_write: %d out of %d bytes written",
                     itemswritten, nframes);
        /* try to fix size fields in header */
        if (filetype == FORMAT_WAVE)
        {
            long datasize = itemswritten * bytesperframe, mofo;

            if (lseek(fd,
                      ((char *)(&((t_wave *)0)->w_chunksize)) - (char *)0,
                      SEEK_SET) == 0)
                goto baddonewrite;
            mofo = swap4(datasize + sizeof(t_wave) - 8, swap);
            if (write(fd, (char *)(&mofo), 4) < 4)
                goto baddonewrite;
            if (lseek(fd,
                      ((char *)(&((t_wave *)0)->w_datachunksize)) - (char *)0,
                      SEEK_SET) == 0)
                goto baddonewrite;
            mofo = swap4(datasize, swap);
            if (write(fd, (char *)(&mofo), 4) < 4)
                goto baddonewrite;
        }
        if (filetype == FORMAT_AIFF)
        {
            long mofo;
            if (lseek(fd,
                      ((char *)(&((t_aiff *)0)->a_nframeshi)) - (char *)0,
                      SEEK_SET) == 0)
                goto baddonewrite;
            mofo = swap4(nframes, swap);
            if (write(fd, (char *)(&mofo), 4) < 4)
                goto baddonewrite;
        }
    }
    return;
baddonewrite:
    post("%s: %s", filename, strerror(errno));
}

static void soundfile_xferout(int nchannels, float **vecs,
                              unsigned char *buf, int nitems, long onset, int bytespersamp,
                              int bigendian, float normalfactor)
{
    int i, j;
    unsigned char *sp, *sp2;
    float *fp;
    int bytesperframe = bytespersamp * nchannels;
    long xx;
    for (i = 0, sp = buf; i < nchannels; i++, sp += bytespersamp)
    {
        if (bytespersamp == 2)
        {
            float ff = normalfactor * 32768.;
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp = vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    int xx = 32768. + (*fp * ff);
                    xx -= 32768;
                    if (xx < -32767)
                        xx = -32767;
                    if (xx > 32767)
                        xx = 32767;
                    sp2[0] = (xx >> 8);
                    sp2[1] = xx;
                }
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    int xx = 32768. + (*fp * ff);
                    xx -= 32768;
                    if (xx < -32767)
                        xx = -32767;
                    if (xx > 32767)
                        xx = 32767;
                    sp2[1] = (xx >> 8);
                    sp2[0] = xx;
                }
            }
        }
        else if (bytespersamp == 3)
        {
            float ff = normalfactor * 8388608.;
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    int xx = 8388608. + (*fp * ff);
                    xx -= 8388608;
                    if (xx < -8388607)
                        xx = -8388607;
                    if (xx > 8388607)
                        xx = 8388607;
                    sp2[0] = (xx >> 16);
                    sp2[1] = (xx >> 8);
                    sp2[2] = xx;
                }
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    int xx = 8388608. + (*fp * ff);
                    xx -= 8388608;
                    if (xx < -8388607)
                        xx = -8388607;
                    if (xx > 8388607)
                        xx = 8388607;
                    sp2[2] = (xx >> 16);
                    sp2[1] = (xx >> 8);
                    sp2[0] = xx;
                }
            }
        }
        else if (bytespersamp == 4)
        {
            if (bigendian)
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    float f2 = *fp * normalfactor;
                    xx = *(long *)&f2;
                    sp2[0] = (xx >> 24);
                    sp2[1] = (xx >> 24);
                    sp2[2] = (xx >> 24);
                    sp2[3] = xx;
                }
            }
            else
            {
                for (j = 0, sp2 = sp, fp=vecs[i] + onset;
                        j < nitems; j++, sp2 += bytesperframe, fp++)
                {
                    float f2 = *fp * normalfactor;
                    xx = *(long *)&f2;
                    sp2[3] = (xx >> 24);
                    sp2[2] = (xx >> 24);
                    sp2[1] = (xx >> 24);
                    sp2[0] = xx;
                }
            }
        }
    }
}


/* ------- soundfiler - reads and writes soundfiles to/from "garrays" ---- */
#define DEFMAXSIZE 4000000 	/* default maximum 16 MB per channel */
#define SAMPBUFSIZE 1024


static t_class *soundfiler2_class;

typedef struct _soundfiler2
{
    t_object x_obj;
    t_canvas *x_canvas;
} t_soundfiler2;

static t_soundfiler2 *soundfiler2_new(void)
{
    t_soundfiler2 *x = (t_soundfiler2 *)pd_new(soundfiler2_class);
    x->x_canvas = canvas_getcurrent();
    outlet_new(&x->x_obj, &s_float);
    return (x);
}

/* soundfiler2_read ...

usage: read [flags] filename table ...
flags:
	-skip <frames> ... frames to skip in file
-nframes <frames>
-onset <frames> ... onset in table to read into (NOT DONE YET)
-raw <headersize channels bytes endian>
-resize
-maxsize <max-size>
*/

static void soundfiler2_read(t_soundfiler2 *x, t_symbol *s,
                             int argc, t_atom *argv)
{
    int headersize = -1, channels = 0, bytespersamp = 0, bigendian = 0,
        resize = 0, i, j;
    long skipframes = 0, nframes = 0, finalsize = 0, itemsleft,
         maxsize = DEFMAXSIZE, itemsread = 0, bytelimit  = 0x7fffffff;
    int fd = -1;
    char endianness, *filename;
    t_garray *garrays[MAXSFCHANS];
    t_float *vecs[MAXSFCHANS];
    char sampbuf[SAMPBUFSIZE];
    int bufframes, nitems;
    FILE *fp;
    while (argc > 0 && argv->a_type == A_SYMBOL &&
            *argv->a_w.w_symbol->s_name == '-')
    {
        char *flag = argv->a_w.w_symbol->s_name + 1;
        if (!strcmp(flag, "skip"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((skipframes = argv[1].a_w.w_float) < 0))
                goto usage;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "nframes"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((nframes = argv[1].a_w.w_float) < 0))
                goto usage;
            argc -= 2;
            argv += 2;
        }
        else if (!strcmp(flag, "raw"))
        {
            if (argc < 5 ||
                    argv[1].a_type != A_FLOAT ||
                    ((headersize = argv[1].a_w.w_float) < 0) ||
                    argv[2].a_type != A_FLOAT ||
                    ((channels = argv[2].a_w.w_float) < 1) ||
                    (channels > MAXSFCHANS) ||
                    argv[3].a_type != A_FLOAT ||
                    ((bytespersamp = argv[3].a_w.w_float) < 2) ||
                    (bytespersamp > 4) ||
                    argv[4].a_type != A_SYMBOL ||
                    ((endianness = argv[4].a_w.w_symbol->s_name[0]) != 'b'
                     && endianness != 'l' && endianness != 'n'))
                goto usage;
            if (endianness == 'b')
                bigendian = 1;
            else if (endianness == 'l')
                bigendian = 0;
            else
                bigendian = garray_ambigendian();
            argc -= 5;
            argv += 5;
        }
        else if (!strcmp(flag, "resize"))
        {
            resize = 1;
            argc -= 1;
            argv += 1;
        }
        else if (!strcmp(flag, "maxsize"))
        {
            if (argc < 2 || argv[1].a_type != A_FLOAT ||
                    ((maxsize = argv[1].a_w.w_float) < 0))
                goto usage;
            resize = 1;     /* maxsize implies resize. */
            argc -= 2;
            argv += 2;
        }
        else goto usage;
    }
    if (argc < 2 || argc > MAXSFCHANS + 1 || argv[0].a_type != A_SYMBOL)
        goto usage;
    filename = argv[0].a_w.w_symbol->s_name;
    argc--;
    argv++;

    for (i = 0; i < argc; i++)
    {
        int vecsize;
        if (argv[i].a_type != A_SYMBOL)
            goto usage;
        if (!(garrays[i] =
                    (t_garray *)pd_findbyclass(argv[i].a_w.w_symbol, garray_class)))
        {
            pd_error(x, "%s: no such table", argv[i].a_w.w_symbol->s_name);
            goto done;
        }
        else if (!garray_getfloatarray(garrays[i], &vecsize, &vecs[i]))
            error("%s: bad template for tabwrite",
                  argv[i].a_w.w_symbol->s_name);
        if (finalsize && finalsize != vecsize && !resize)
        {
            post("soundfiler2_read: arrays have different lengths; resizing...");
            resize = 1;
        }
        finalsize = vecsize;
    }
    fd = open_soundfile(canvas_getdir(x->x_canvas)->s_name, filename,
                        headersize, &bytespersamp, &bigendian, &channels, &bytelimit,
                        skipframes);

    if (fd < 0)
    {
        pd_error(x, "soundfiler2_read: %s: %s", filename, (errno == EIO ?
                 "unknown or bad header format" : strerror(errno)));
        goto done;
    }

    if (resize)
    {
        /* figure out what to resize to */
        long poswas, eofis, framesinfile;

        poswas = lseek(fd, 0, SEEK_CUR);
        eofis = lseek(fd, 0, SEEK_END);
        if (poswas < 0 || eofis < 0)
        {
            pd_error(x, "lseek failed");
            goto done;
        }
        lseek(fd, poswas, SEEK_SET);
        framesinfile = (eofis - poswas) / (channels * bytespersamp);
        if (framesinfile > maxsize)
        {
            pd_error(x, "soundfiler2_read: truncated to %d elements", maxsize);
            framesinfile = maxsize;
        }
        if (framesinfile > bytelimit / bytespersamp)
            framesinfile = bytelimit / bytespersamp;
        finalsize = framesinfile;
        for (i = 0; i < argc; i++)
        {
            int vecsize;

            garray_resize(garrays[i], finalsize);
            /* for sanity's sake let's clear the save-in-patch flag here */
            garray_setsaveit(garrays[i], 0);
            garray_getfloatarray(garrays[i], &vecsize, &vecs[i]);
            /* if the resize failed, garray_resize reported the error */
            if (vecsize != framesinfile)
            {
                pd_error(x, "resize failed");
                goto done;
            }
        }
    }
    if (!finalsize) finalsize = 0x7fffffff;
    if (finalsize > bytelimit / bytespersamp)
        finalsize = bytelimit / bytespersamp;
    fp = fdopen(fd, "rb");
    bufframes = SAMPBUFSIZE / (channels * bytespersamp);

    for (itemsread = 0; itemsread < finalsize; )
    {
        int thisread = finalsize - itemsread;
        thisread = (thisread > bufframes ? bufframes : thisread);
        nitems = fread(sampbuf, channels * bytespersamp, thisread, fp);
        if (nitems <= 0) break;
        soundfile_xferin(channels, argc, vecs, itemsread,
                         (unsigned char *)sampbuf, nitems, bytespersamp, bigendian);
        itemsread += nitems;
    }
    /* zero out remaining elements of vectors */

    for (i = 0; i < argc; i++)
    {
        int nzero, vecsize;
        garray_getfloatarray(garrays[i], &vecsize, &vecs[i]);
        for (j = itemsread; j < vecsize; j++)
            vecs[i][j] = 0;
    }
    /* zero out vectors in excess of number of channels */
    for (i = channels; i < argc; i++)
    {
        int vecsize;
        float *foo;
        garray_getfloatarray(garrays[i], &vecsize, &foo);
        for (j = 0; j < vecsize; j++)
            foo[j] = 0;
    }
    /* do all graphics updates */
    for (i = 0; i < argc; i++)
        garray_redraw(garrays[i]);
    fclose(fp);
    fd = -1;
    goto done;
usage:
    pd_error(x, "usage: read [flags] filename tablename...");
    post("flags: -skip <n> -nframes <n> -resize -maxsize <n> ...");
    post("-raw <headerbytes> <channels> <bytespersamp> <endian (b, l, or n)>.");
done:
    if (fd >= 0)
        close (fd);
    outlet_float(x->x_obj.ob_outlet, (float)itemsread);
}

/* this is broken out from soundfiler2_write below so garray_write can
call it too... not done yet though. */

static long soundfiler2_dowrite(void *obj, t_canvas *canvas,
                                int argc, t_atom *argv)
{
    int headersize, bytespersamp, bigendian,
        endianness, swap, filetype, normalize, i, j, nchannels;
    long onset, nframes, itemsleft,
         maxsize = DEFMAXSIZE, itemswritten = 0;
    t_garray *garrays[MAXSFCHANS];
    t_float *vecs[MAXSFCHANS];
    char sampbuf[SAMPBUFSIZE];
    int bufframes, nitems;
    int fd = -1;
    float normfactor, biggest = 0,ftmp,amp;
    t_symbol *filesym;

    if (soundfiler2_writeargparse(obj, &argc, &argv, &filesym, &filetype,
                                  &bytespersamp, &swap, &bigendian, &normalize, &onset, &nframes,&amp))
        goto usage;
    nchannels = argc;
    if (nchannels < 1 || nchannels > MAXSFCHANS)
        goto usage;

    for (i = 0; i < nchannels; i++)
    {
        int vecsize;

        if (argv[i].a_type != A_SYMBOL) goto usage;

        if (!(garrays[i] =
                    (t_garray *)pd_findbyclass(argv[i].a_w.w_symbol, garray_class)))
        {
            pd_error(obj, "%s: no such table", argv[i].a_w.w_symbol->s_name);
            goto fail;
        }
        else if (!garray_getfloatarray(garrays[i], &vecsize, &vecs[i]))
            error("%s: bad template for tabwrite",argv[i].a_w.w_symbol->s_name);
        if (nframes > vecsize - onset)
            nframes = vecsize - onset;

        for (j = 0; j < nframes; j++) /* FIXED (Antoine Rousseau)*/
        {
            ftmp=vecs[i][j+onset];
            if (ftmp > biggest) biggest = ftmp;
            else if (-ftmp > biggest) biggest = -ftmp;
        }
    }

    if (nframes <= 0)
    {
        pd_error(obj, "soundfiler2_write: no samples at onset %ld", onset);
        goto fail;
    }

    if ((fd = create_soundfile2(canvas, filesym->s_name, filetype,
                                nframes, bytespersamp, bigendian, nchannels,
                                swap)) < 0)
    {
        post("%s: %s\n", filesym->s_name, strerror(errno));
        goto fail;
    }
    if (!normalize)
    {
        if ((bytespersamp != 4) && (biggest > 1))
        {
            //post("%s: normalizing max amplitude %f to 1", filesym->s_name, biggest);
            normalize = 1;
        }
        //else post("%s: biggest amplitude = %f", filesym->s_name, biggest);
    }
    if (normalize)
        normfactor = (biggest > 0 ? 32767./(32768. * biggest) : 1);
    else normfactor = amp;

    /*post("%s: biggest amplitude = %f , normfactor = %f",
    	filesym->s_name, biggest,normfactor);*/

    bufframes = SAMPBUFSIZE / (nchannels * bytespersamp);

    for (itemswritten = 0; itemswritten < nframes; )
    {
        int thiswrite = nframes - itemswritten, nitems, nbytes;
        thiswrite = (thiswrite > bufframes ? bufframes : thiswrite);
        soundfile_xferout(argc, vecs, (unsigned char *)sampbuf, thiswrite,
                          onset, bytespersamp, bigendian, normfactor);
        nbytes = write(fd, sampbuf, nchannels * bytespersamp * thiswrite);
        if (nbytes < nchannels * bytespersamp * thiswrite)
        {
            post("%s: %s", filesym->s_name, strerror(errno));
            if (nbytes > 0)
                itemswritten += nbytes / (nchannels * bytespersamp);
            break;
        }
        itemswritten += thiswrite;
        onset += thiswrite;
    }
    if (fd >= 0)
    {
        soundfile_finishwrite(obj, filesym->s_name, fd,
                              filetype, nframes, itemswritten, nchannels * bytespersamp, swap);
        close (fd);
    }
    return ((float)itemswritten);
usage:
    pd_error(obj, "usage: write [flags] filename tablename...");
    post("flags: -skip <n> -nframes <n> -bytes <n> -wave -aiff -nextstep ...");
    post("-big -little -normalize -amp <n>");
    post("(defaults to a 16-bit wave file).");
fail:
    if (fd >= 0)
        close (fd);
    return (0);
}

static void soundfiler2_write(t_soundfiler2 *x, t_symbol *s,
                              int argc, t_atom *argv)
{
    long bozo = soundfiler2_dowrite(x, x->x_canvas,
                                    argc, argv);
    outlet_float(x->x_obj.ob_outlet, (float)bozo);
}

void soundfiler2_setup(void)
{
    soundfiler2_class = class_new(gensym("soundfiler2"), (t_newmethod)soundfiler2_new,
                                  0, sizeof(t_soundfiler2), 0, 0);
    class_addmethod(soundfiler2_class, (t_method)soundfiler2_read, gensym("read"),
                    A_GIMME, 0);
    class_addmethod(soundfiler2_class, (t_method)soundfiler2_write,
                    gensym("write"), A_GIMME, 0);
}

/************************* readsf object ******************************/

/* READSF uses the Posix threads package; for the moment we're Linux
only although this should be portable to the other platforms.

Each instance of readsf~ owns a "child" thread for doing the UNIX (NT?) file
reading.  The parent thread signals the child each time:
    (1) a file wants opening or closing;
    (2) we've eaten another 1/16 of the shared buffer (so that the
    	child thread should check if it's time to read some more.)
The child signals the parent whenever a read has completed.  Signalling
is done by setting "conditions" and putting data in mutex-controlled common
areas.
*/

#ifdef __linux__

#define MAXBYTESPERSAMPLE 4
#define MAXVECSIZE 128

#define READSIZE 65536
#define WRITESIZE 65536
#define DEFBUFPERCHAN 262144
#define MINBUFSIZE (4 * READSIZE)
#define MAXBUFSIZE 16777216 	/* arbitrary; just don't want to hang malloc */

#define REQUEST_NOTHING 0
#define REQUEST_OPEN 1
#define REQUEST_CLOSE 2
#define REQUEST_QUIT 3
#define REQUEST_BUSY 4

#define STATE_IDLE 0
#define STATE_STARTUP 1
#define STATE_STREAM 2

static t_class *readsfv_class;

static t_sample *(tmpvec[MAXSFCHANS]);

typedef struct _readsf
{
    t_object x_obj;
    t_canvas *x_canvas;
    t_clock *x_clock;
    char *x_buf;    	    	    	    /* soundfile buffer */
    int x_bufsize;  	    	    	    /* buffer size in bytes */
    int x_noutlets; 	    	    	    /* number of audio outlets */
    t_sample *(x_outvec[MAXSFCHANS]);	    /* audio vectors */
    int x_vecsize;  	    	    	    /* vector size for transfers */
    t_outlet *x_bangout;  	    	    /* bang-on-done outlet */
    int x_state;    	    	    	    /* opened, running, or idle */
    /* parameters to communicate with subthread */
    int x_requestcode;	    /* pending request from parent to I/O thread */
    char *x_filename;	    /* file to open (string is permanently allocated) */
    int x_fileerror;	    /* slot for "errno" return */
    int x_skipheaderbytes;  /* size of header we'll skip */
    int x_bytespersample;   /* bytes per sample (2 or 3) */
    int x_bigendian;        /* true if file is big-endian */
    int x_sfchannels;	    /* number of channels in soundfile */
    long x_onsetframes;	    /* number of sample frames to skip */
    long x_bytelimit;	    /* max number of data bytes to read */
    int x_fd;	    	    /* filedesc */
    int x_fifosize; 	    /* buffer size appropriately rounded down */
    int x_fifohead; 	    /* index of next byte to get from file */
    int x_fifotail; 	    /* index of next byte the ugen will read */
    int x_eof;   	    /* true if fifohead has stopped changing */
    int x_sigcountdown;     /* counter for signalling child for more data */
    int x_sigperiod;	    /* number of ticks per signal */
    int x_filetype; 	    /* writesf~ only; type of file to create */
    int x_itemswritten;     /* writesf~ only; items writen */
    int x_swap; 	    /* writesf~ only; true if byte swapping */
    float x_f; 	    	    /* writesf~ only; scalar for signal inlet */
    /*----HACK------*/
    float x_speed;    /*speed of reading*/
    float x_frac;    /*fractionnal part of sample to play next buffer*/

    pthread_mutex_t x_mutex;
    pthread_cond_t x_requestcondition;
    pthread_cond_t x_answercondition;
    pthread_t x_childthread;
} t_readsf;


/************** the child thread which performs file I/O ***********/

#if 0
static void pute(char *s)   /* debug routine */
{
    write(2, s, strlen(s));
}
#else
#define pute(x)
#endif

#if 1
#define sfread_cond_wait pthread_cond_wait
#define sfread_cond_signal pthread_cond_signal
#else
#include <sys/time.h>    /* debugging version... */
#include <sys/types.h>
static void readsf_fakewait(pthread_mutex_t *b)
{
    struct timeval timout;
    timout.tv_sec = 0;
    timout.tv_usec = 1000000;
    pthread_mutex_unlock(b);
    select(0, 0, 0, 0, &timout);
    pthread_mutex_lock(b);
}

static void readsf_banana( void)
{
    struct timeval timout;
    timout.tv_sec = 0;
    timout.tv_usec = 200000;
    pute("banana1\n");
    select(0, 0, 0, 0, &timout);
    pute("banana2\n");
}


#define sfread_cond_wait(a,b) readsf_fakewait(b)
#define sfread_cond_signal(a)
#endif

static void *readsf_child_main(void *zz)
{
    t_readsf *x = zz;
    pute("1\n");
    pthread_mutex_lock(&x->x_mutex);
    while (1)
    {
        int fd, fifohead;
        char *buf;
        pute("0\n");
        if (x->x_requestcode == REQUEST_NOTHING)
        {
            pute("wait 2\n");
            sfread_cond_signal(&x->x_answercondition);
            sfread_cond_wait(&x->x_requestcondition, &x->x_mutex);
            pute("3\n");
        }
        else if (x->x_requestcode == REQUEST_OPEN)
        {
            char boo[80];
            int sysrtn, wantbytes;

            /* copy file stuff out of the data structure so we can
            relinquish the mutex while we're in open_soundfile(). */
            long onsetframes = x->x_onsetframes;
            long bytelimit = 0x7fffffff;
            int skipheaderbytes = x->x_skipheaderbytes;
            int bytespersample = x->x_bytespersample;
            int sfchannels = x->x_sfchannels;
            int bigendian = x->x_bigendian;
            char *filename = x->x_filename;
            char *dirname = canvas_getdir(x->x_canvas)->s_name;
            /* alter the request code so that an ensuing "open" will get
            noticed. */
            pute("4\n");
            x->x_requestcode = REQUEST_BUSY;
            x->x_fileerror = 0;

            /* if there's already a file open, close it */
            if (x->x_fd >= 0)
            {
                fd = x->x_fd;
                pthread_mutex_unlock(&x->x_mutex);
                close (fd);
                pthread_mutex_lock(&x->x_mutex);
                x->x_fd = -1;
                if (x->x_requestcode != REQUEST_BUSY)
                    goto lost;
            }
            /* open the soundfile with the mutex unlocked */
            pthread_mutex_unlock(&x->x_mutex);
            fd = open_soundfile(dirname, filename,
                                skipheaderbytes, &bytespersample, &bigendian,
                                &sfchannels, &bytelimit, onsetframes);
            pthread_mutex_lock(&x->x_mutex);

            pute("5\n");
            /* copy back into the instance structure. */
            x->x_bytespersample = bytespersample;
            x->x_sfchannels = sfchannels;
            x->x_bigendian = bigendian;
            x->x_fd = fd;
            x->x_bytelimit = bytelimit;
            if (fd < 0)
            {
                x->x_fileerror = errno;
                x->x_eof = 1;
                pute("open failed\n");
                pute(filename);
                pute(dirname);
                goto lost;
            }
            /* check if another request has been made; if so, field it */
            if (x->x_requestcode != REQUEST_BUSY)
                goto lost;
            pute("6\n");
            x->x_fifohead = 0;
            /* set fifosize from bufsize.  fifosize must be a
            multiple of the number of bytes eaten for each DSP
            tick.  We pessimistically assume MAXVECSIZE samples
            per tick since that could change.  There could be a
            problem here if the vector size increases while a
            soundfile is being played...  */
            x->x_fifosize = x->x_bufsize - (x->x_bufsize %
                                            (x->x_bytespersample * x->x_sfchannels * MAXVECSIZE));
            /* arrange for the "request" condition to be signalled 16
            times per buffer */
            sprintf(boo, "fifosize %d\n",
                    x->x_fifosize);
            pute(boo);
            x->x_sigcountdown = x->x_sigperiod =
                                    (x->x_fifosize /
                                     (16 * x->x_bytespersample * x->x_sfchannels *
                                      x->x_vecsize));
            /* in a loop, wait for the fifo to get hungry and feed it */

            while (x->x_requestcode == REQUEST_BUSY)
            {
                int fifosize = x->x_fifosize;
                pute("77\n");
                if (x->x_eof)
                    break;
                if (x->x_fifohead >= x->x_fifotail)
                {
                    /* if the head is >= the tail, we can immediately read
                    to the end of the fifo.  Unless, that is, we would
                    read all the way to the end of the buffer and the
                    "tail" is zero; this would fill the buffer completely
                    which isn't allowed because you can't tell a completely
                    full buffer from an empty one. */
                    if (x->x_fifotail || (fifosize - x->x_fifohead > READSIZE))
                    {
                        wantbytes = fifosize - x->x_fifohead;
                        if (wantbytes > READSIZE)
                            wantbytes = READSIZE;
                        if (wantbytes > x->x_bytelimit)
                            wantbytes = x->x_bytelimit;
                        sprintf(boo, "head %d, tail %d, size %d\n",
                                x->x_fifohead, x->x_fifotail, wantbytes);
                        pute(boo);
                    }
                    else
                    {
                        pute("wait 7a ...\n");
                        sfread_cond_signal(&x->x_answercondition);
                        pute("signalled\n");
                        sfread_cond_wait(&x->x_requestcondition,
                                         &x->x_mutex);
                        pute("7a done\n");
                        continue;
                    }
                }
                else
                {
                    /* otherwise check if there are at least READSIZE
                    bytes to read.  If not, wait and loop back. */
                    wantbytes =  x->x_fifotail - x->x_fifohead - 1;
                    if (wantbytes < READSIZE)
                    {
                        pute("wait 7...\n");
                        sfread_cond_signal(&x->x_answercondition);
                        sfread_cond_wait(&x->x_requestcondition,
                                         &x->x_mutex);
                        pute("7 done\n");
                        continue;
                    }
                    else wantbytes = READSIZE;
                }
                pute("8\n");
                fd = x->x_fd;
                buf = x->x_buf;
                fifohead = x->x_fifohead;
                pthread_mutex_unlock(&x->x_mutex);
                sysrtn = read(fd, buf + fifohead, wantbytes);
                pthread_mutex_lock(&x->x_mutex);
                if (x->x_requestcode != REQUEST_BUSY)
                    break;
                if (sysrtn < 0)
                {
                    pute("fileerror\n");
                    x->x_fileerror = errno;
                    break;
                }
                else if (sysrtn == 0)
                {
                    x->x_eof = 1;
                    break;
                }
                else
                {
                    x->x_fifohead += sysrtn;
                    x->x_bytelimit -= sysrtn;
                    if (x->x_bytelimit <= 0)
                    {
                        x->x_eof = 1;
                        break;
                    }
                    if (x->x_fifohead == fifosize)
                        x->x_fifohead = 0;
                }
                sprintf(boo, "after: head %d, tail %d\n",
                        x->x_fifohead, x->x_fifotail);
                pute(boo);
                /* signal parent in case it's waiting for data */
                sfread_cond_signal(&x->x_answercondition);
            }
lost:

            if (x->x_requestcode == REQUEST_BUSY)
                x->x_requestcode = REQUEST_NOTHING;
            /* fell out of read loop: close file if necessary,
            set EOF and signal once more */
            if (x->x_fd >= 0)
            {
                fd = x->x_fd;
                pthread_mutex_unlock(&x->x_mutex);
                close (fd);
                pthread_mutex_lock(&x->x_mutex);
                x->x_fd = -1;
            }
            sfread_cond_signal(&x->x_answercondition);

        }
        else if (x->x_requestcode == REQUEST_CLOSE)
        {
            if (x->x_fd >= 0)
            {
                fd = x->x_fd;
                pthread_mutex_unlock(&x->x_mutex);
                close (fd);
                pthread_mutex_lock(&x->x_mutex);
                x->x_fd = -1;
            }
            if (x->x_requestcode == REQUEST_CLOSE)
                x->x_requestcode = REQUEST_NOTHING;
            sfread_cond_signal(&x->x_answercondition);
        }
        else if (x->x_requestcode == REQUEST_QUIT)
        {
            if (x->x_fd >= 0)
            {
                fd = x->x_fd;
                pthread_mutex_unlock(&x->x_mutex);
                close (fd);
                pthread_mutex_lock(&x->x_mutex);
                x->x_fd = -1;
            }
            x->x_requestcode = REQUEST_NOTHING;
            sfread_cond_signal(&x->x_answercondition);
            break;
        }
        else
        {
            pute("13\n");
        }
    }
    pute("thread exit\n");
    pthread_mutex_unlock(&x->x_mutex);
    return (0);
}

/******** the object proper runs in the calling (parent) thread ****/

static void readsf_tick(t_readsf *x);

static void *readsf_new(t_floatarg fnchannels, t_floatarg fbufsize)
{
    t_readsf *x;
    int nchannels = fnchannels, bufsize = fbufsize, i;
    char *buf;

    if (nchannels < 1)
        nchannels = 1;
    else if (nchannels > MAXSFCHANS)
        nchannels = MAXSFCHANS;
    if (bufsize <= 0) bufsize = DEFBUFPERCHAN * nchannels;
    else if (bufsize < MINBUFSIZE)
        bufsize = MINBUFSIZE;
    else if (bufsize > MAXBUFSIZE)
        bufsize = MAXBUFSIZE;
    buf = getbytes(bufsize);
    if (!buf) return (0);

    x = (t_readsf *)pd_new(readsfv_class);

    for (i = 0; i < nchannels; i++)
        outlet_new(&x->x_obj, gensym("signal"));
    x->x_noutlets = nchannels;
    x->x_bangout = outlet_new(&x->x_obj, &s_bang);
    pthread_mutex_init(&x->x_mutex, 0);
    pthread_cond_init(&x->x_requestcondition, 0);
    pthread_cond_init(&x->x_answercondition, 0);
    x->x_vecsize = MAXVECSIZE;
    x->x_state = STATE_IDLE;
    x->x_clock = clock_new(x, (t_method)readsf_tick);
    x->x_canvas = canvas_getcurrent();
    x->x_bytespersample = 2;
    x->x_sfchannels = 1;
    x->x_fd = -1;
    x->x_buf = buf;
    x->x_bufsize = bufsize;
    x->x_fifosize = x->x_fifohead = x->x_fifotail = x->x_requestcode = 0;
    pthread_create(&x->x_childthread, 0, readsf_child_main, x);
    return (x);
}

static void readsf_tick(t_readsf *x)
{
    outlet_bang(x->x_bangout);
}

static t_int *readsf_perform(t_int *w)
{
    t_readsf *x = (t_readsf *)(w[1]);
    int vecsize = x->x_vecsize, noutlets = x->x_noutlets, i, j,
        bytespersample = x->x_bytespersample,
        bigendian = x->x_bigendian,wantsamples;
    float *fp,tmp,speed=x->x_speed;
    if (x->x_state == STATE_STREAM)
    {
        int wantbytes, nchannels, sfchannels = x->x_sfchannels;
        pthread_mutex_lock(&x->x_mutex);
        tmp=vecsize *speed+x->x_frac;
        wantsamples=(int)tmp;
        x->x_frac=tmp-wantsamples;

        if(!speed) goto idle;

        wantbytes = sfchannels * wantsamples * bytespersample;

        while (
            !x->x_eof && x->x_fifohead >= x->x_fifotail &&
            x->x_fifohead < x->x_fifotail + wantbytes-1)
        {
            pute("wait...\n");
            sfread_cond_signal(&x->x_requestcondition);
            sfread_cond_wait(&x->x_answercondition, &x->x_mutex);
            pute("done\n");
        }
        if (x->x_eof && x->x_fifohead >= x->x_fifotail &&
                x->x_fifohead < x->x_fifotail + wantbytes-1)
        {
            if (x->x_fileerror)
            {
                pd_error(x, "dsp: %s: %s", x->x_filename,
                         (x->x_fileerror == EIO ?
                          "unknown or bad header format" :
                          strerror(x->x_fileerror)));
            }
            clock_delay(x->x_clock, 0);
            x->x_state = STATE_IDLE;
            sfread_cond_signal(&x->x_requestcondition);
            pthread_mutex_unlock(&x->x_mutex);
            goto idle;
        }

        if(speed==1)
            soundfile_xferin(sfchannels, noutlets, x->x_outvec, 0,
                             (unsigned char *)(x->x_buf + x->x_fifotail), vecsize,
                             bytespersample, bigendian);
        else
        {
            soundfile_xferin(sfchannels, noutlets, tmpvec, 0,
                             (unsigned char *)(x->x_buf + x->x_fifotail), wantsamples,
                             bytespersample, bigendian);
            interpolate(noutlets,tmpvec,wantsamples,x->x_outvec,vecsize);
        }

        x->x_fifotail += wantbytes;
        if (x->x_fifotail >= x->x_fifosize)
            x->x_fifotail = 0;
        if ((--x->x_sigcountdown) <= 0)
        {
            sfread_cond_signal(&x->x_requestcondition);
            x->x_sigcountdown = x->x_sigperiod;
        }
        pthread_mutex_unlock(&x->x_mutex);
    }
    else
    {
idle:
        for (i = 0; i < noutlets; i++)
            for (j = vecsize, fp = x->x_outvec[i]; j--; )
                *fp++ = 0;
    }
    return (w+2);
}

static void readsf_start(t_readsf *x)
{
    /* start making output.  If we're in the "startup" state change
    to the "running" state. */
    if (x->x_state == STATE_STARTUP)
        x->x_state = STATE_STREAM;
    else pd_error(x, "readsf: start requested with no prior 'open'");
}

static void readsf_stop(t_readsf *x)
{
    /* LATER rethink whether you need the mutex just to set a variable? */
    pthread_mutex_lock(&x->x_mutex);
    x->x_state = STATE_IDLE;
    x->x_requestcode = REQUEST_CLOSE;
    sfread_cond_signal(&x->x_requestcondition);
    pthread_mutex_unlock(&x->x_mutex);
}

static void readsf_float(t_readsf *x, t_floatarg f)
{
    if (f != 0)
        readsf_start(x);
    else readsf_stop(x);
}

static void readsf_speed(t_readsf *x, t_floatarg f)
{
    if((f>=0)&&(f<=8))
        x->x_speed=f;
}

/* open method.  Called as:
open filename [skipframes headersize channels bytespersamp endianness]
	(if headersize is zero, header is taken to be automatically
detected; thus, use the special "-1" to mean a truly headerless file.)
*/

static void readsf_open(t_readsf *x, t_symbol *s, int argc, t_atom *argv)
{
    t_symbol *filesym = atom_getsymbolarg(0, argc, argv);
    t_float onsetframes = atom_getfloatarg(1, argc, argv);
    t_float headerbytes = atom_getfloatarg(2, argc, argv);
    t_float channels = atom_getfloatarg(3, argc, argv);
    t_float bytespersamp = atom_getfloatarg(4, argc, argv);
    t_symbol *endian = atom_getsymbolarg(5, argc, argv);
    if (!*filesym->s_name)
        return;
    pthread_mutex_lock(&x->x_mutex);
    x->x_requestcode = REQUEST_OPEN;
    x->x_filename = filesym->s_name;
    x->x_fifotail = 0;
    x->x_fifohead = 0;
    if (*endian->s_name == 'b')
        x->x_bigendian = 1;
    else if (*endian->s_name == 'l')
        x->x_bigendian = 0;
    else if (*endian->s_name)
        pd_error(x, "endianness neither 'b' nor 'l'");
    else x->x_bigendian = garray_ambigendian();
    x->x_onsetframes = (onsetframes > 0 ? onsetframes : 0);
    x->x_skipheaderbytes = (headerbytes > 0 ? headerbytes :
                            (headerbytes == 0 ? -1 : 0));
    x->x_sfchannels = (channels >= 1 ? channels : 1);
    x->x_bytespersample = (bytespersamp > 2 ? bytespersamp : 2);
    x->x_eof = 0;
    x->x_fileerror = 0;
    x->x_state = STATE_STARTUP;
    x->x_speed=1;
    x->x_frac=0;
    sfread_cond_signal(&x->x_requestcondition);
    pthread_mutex_unlock(&x->x_mutex);
}

static void readsf_dsp(t_readsf *x, t_signal **sp)
{
    int i, noutlets = x->x_noutlets;
    pthread_mutex_lock(&x->x_mutex);
    x->x_vecsize = sp[0]->s_n;

    x->x_sigperiod = (x->x_fifosize /
                      (x->x_bytespersample * x->x_sfchannels * x->x_vecsize));
    for (i = 0; i < noutlets; i++)
        x->x_outvec[i] = sp[i]->s_vec;
    pthread_mutex_unlock(&x->x_mutex);
    dsp_add(readsf_perform, 1, x);
}

static void readsf_print(t_readsf *x)
{
    post("state %d", x->x_state);
    post("fifo head %d", x->x_fifohead);
    post("fifo tail %d", x->x_fifotail);
    post("fifo size %d", x->x_fifosize);
    post("fd %d", x->x_fd);
    post("eof %d", x->x_eof);
}

static void readsf_free(t_readsf *x)
{
    /* request QUIT and wait for acknowledge */
    void *threadrtn;
    pthread_mutex_lock(&x->x_mutex);
    x->x_requestcode = REQUEST_QUIT;
    post("stopping readsf thread...");
    sfread_cond_signal(&x->x_requestcondition);
    while (x->x_requestcode != REQUEST_NOTHING)
    {
        post("signalling...");
        sfread_cond_signal(&x->x_requestcondition);
        sfread_cond_wait(&x->x_answercondition, &x->x_mutex);
    }
    pthread_mutex_unlock(&x->x_mutex);
    if (pthread_join(x->x_childthread, &threadrtn))
        error("readsf_free: join failed");
    post("... done.");

    pthread_cond_destroy(&x->x_requestcondition);
    pthread_cond_destroy(&x->x_answercondition);
    pthread_mutex_destroy(&x->x_mutex);
    freebytes(x->x_buf, x->x_bufsize);
    clock_free(x->x_clock);
}

#endif /* __linux__ */

void readsfv_tilde_setup(void)
{
#ifdef __linux__
    int i;

    readsfv_class = class_new(gensym("readsfv~"), (t_newmethod)readsf_new,
                              (t_method)readsf_free, sizeof(t_readsf), 0, A_DEFFLOAT, A_DEFFLOAT, 0);

    class_addfloat(readsfv_class, (t_method)readsf_float);
    class_addmethod(readsfv_class, (t_method)readsf_speed, gensym("speed"), A_FLOAT,0);
    class_addmethod(readsfv_class, (t_method)readsf_start, gensym("start"), 0);
    class_addmethod(readsfv_class, (t_method)readsf_stop, gensym("stop"), 0);
    class_addmethod(readsfv_class, (t_method)readsf_dsp, gensym("dsp"), 0);
    class_addmethod(readsfv_class, (t_method)readsf_open, gensym("open"),
                    A_GIMME, 0);
    class_addmethod(readsfv_class, (t_method)readsf_print, gensym("print"), 0);

    for(i=0; i<MAXSFCHANS; i++)
        tmpvec[i]=getbytes(sizeof(t_sample)*8*1024);
#endif /* __linux__ */
}



#endif /* NOT _WIN32 */