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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 153337 $")
00030
00031 #include <unistd.h>
00032 #include <netinet/in.h>
00033 #include <arpa/inet.h>
00034 #include <stdlib.h>
00035 #include <sys/time.h>
00036 #include <stdio.h>
00037 #include <errno.h>
00038 #include <string.h>
00039
00040 #include "asterisk/lock.h"
00041 #include "asterisk/channel.h"
00042 #include "asterisk/file.h"
00043 #include "asterisk/logger.h"
00044 #include "asterisk/sched.h"
00045 #include "asterisk/module.h"
00046 #include "asterisk/endian.h"
00047
00048
00049
00050
00051
00052 #define WAV_BUF_SIZE 320
00053
00054 struct wav_desc {
00055 int bytes;
00056 int needsgain;
00057 int lasttimeout;
00058 int maxlen;
00059 struct timeval last;
00060 };
00061
00062 #define BLOCKSIZE 160
00063
00064 #define GAIN 0
00065
00066
00067 #if __BYTE_ORDER == __LITTLE_ENDIAN
00068 #define htoll(b) (b)
00069 #define htols(b) (b)
00070 #define ltohl(b) (b)
00071 #define ltohs(b) (b)
00072 #else
00073 #if __BYTE_ORDER == __BIG_ENDIAN
00074 #define htoll(b) \
00075 (((((b) ) & 0xFF) << 24) | \
00076 ((((b) >> 8) & 0xFF) << 16) | \
00077 ((((b) >> 16) & 0xFF) << 8) | \
00078 ((((b) >> 24) & 0xFF) ))
00079 #define htols(b) \
00080 (((((b) ) & 0xFF) << 8) | \
00081 ((((b) >> 8) & 0xFF) ))
00082 #define ltohl(b) htoll(b)
00083 #define ltohs(b) htols(b)
00084 #else
00085 #error "Endianess not defined"
00086 #endif
00087 #endif
00088
00089
00090 static int check_header(FILE *f)
00091 {
00092 int type, size, formtype;
00093 int fmt, hsize;
00094 short format, chans, bysam, bisam;
00095 int bysec;
00096 int freq;
00097 int data;
00098 if (fread(&type, 1, 4, f) != 4) {
00099 ast_log(LOG_WARNING, "Read failed (type)\n");
00100 return -1;
00101 }
00102 if (fread(&size, 1, 4, f) != 4) {
00103 ast_log(LOG_WARNING, "Read failed (size)\n");
00104 return -1;
00105 }
00106 size = ltohl(size);
00107 if (fread(&formtype, 1, 4, f) != 4) {
00108 ast_log(LOG_WARNING, "Read failed (formtype)\n");
00109 return -1;
00110 }
00111 if (memcmp(&type, "RIFF", 4)) {
00112 ast_log(LOG_WARNING, "Does not begin with RIFF\n");
00113 return -1;
00114 }
00115 if (memcmp(&formtype, "WAVE", 4)) {
00116 ast_log(LOG_WARNING, "Does not contain WAVE\n");
00117 return -1;
00118 }
00119 if (fread(&fmt, 1, 4, f) != 4) {
00120 ast_log(LOG_WARNING, "Read failed (fmt)\n");
00121 return -1;
00122 }
00123 if (memcmp(&fmt, "fmt ", 4)) {
00124 ast_log(LOG_WARNING, "Does not say fmt\n");
00125 return -1;
00126 }
00127 if (fread(&hsize, 1, 4, f) != 4) {
00128 ast_log(LOG_WARNING, "Read failed (formtype)\n");
00129 return -1;
00130 }
00131 if (ltohl(hsize) < 16) {
00132 ast_log(LOG_WARNING, "Unexpected header size %d\n", ltohl(hsize));
00133 return -1;
00134 }
00135 if (fread(&format, 1, 2, f) != 2) {
00136 ast_log(LOG_WARNING, "Read failed (format)\n");
00137 return -1;
00138 }
00139 if (ltohs(format) != 1) {
00140 ast_log(LOG_WARNING, "Not a wav file %d\n", ltohs(format));
00141 return -1;
00142 }
00143 if (fread(&chans, 1, 2, f) != 2) {
00144 ast_log(LOG_WARNING, "Read failed (format)\n");
00145 return -1;
00146 }
00147 if (ltohs(chans) != 1) {
00148 ast_log(LOG_WARNING, "Not in mono %d\n", ltohs(chans));
00149 return -1;
00150 }
00151 if (fread(&freq, 1, 4, f) != 4) {
00152 ast_log(LOG_WARNING, "Read failed (freq)\n");
00153 return -1;
00154 }
00155 if (ltohl(freq) != DEFAULT_SAMPLE_RATE) {
00156 ast_log(LOG_WARNING, "Unexpected freqency %d\n", ltohl(freq));
00157 return -1;
00158 }
00159
00160 if (fread(&bysec, 1, 4, f) != 4) {
00161 ast_log(LOG_WARNING, "Read failed (BYTES_PER_SECOND)\n");
00162 return -1;
00163 }
00164
00165 if (fread(&bysam, 1, 2, f) != 2) {
00166 ast_log(LOG_WARNING, "Read failed (BYTES_PER_SAMPLE)\n");
00167 return -1;
00168 }
00169 if (ltohs(bysam) != 2) {
00170 ast_log(LOG_WARNING, "Can only handle 16bits per sample: %d\n", ltohs(bysam));
00171 return -1;
00172 }
00173 if (fread(&bisam, 1, 2, f) != 2) {
00174 ast_log(LOG_WARNING, "Read failed (Bits Per Sample): %d\n", ltohs(bisam));
00175 return -1;
00176 }
00177
00178 if (fseek(f,ltohl(hsize)-16,SEEK_CUR) == -1 ) {
00179 ast_log(LOG_WARNING, "Failed to skip remaining header bytes: %d\n", ltohl(hsize)-16 );
00180 return -1;
00181 }
00182
00183 for(;;)
00184 {
00185 char buf[4];
00186
00187
00188 if (fread(&buf, 1, 4, f) != 4) {
00189 ast_log(LOG_WARNING, "Read failed (data)\n");
00190 return -1;
00191 }
00192
00193 if (fread(&data, 1, 4, f) != 4) {
00194 ast_log(LOG_WARNING, "Read failed (data)\n");
00195 return -1;
00196 }
00197 data = ltohl(data);
00198 if(memcmp(buf, "data", 4) == 0 )
00199 break;
00200 if(memcmp(buf, "fact", 4) != 0 ) {
00201 ast_log(LOG_WARNING, "Unknown block - not fact or data\n");
00202 return -1;
00203 }
00204 if (fseek(f,data,SEEK_CUR) == -1 ) {
00205 ast_log(LOG_WARNING, "Failed to skip fact block: %d\n", data );
00206 return -1;
00207 }
00208 }
00209 #if 0
00210 curpos = lseek(fd, 0, SEEK_CUR);
00211 truelength = lseek(fd, 0, SEEK_END);
00212 lseek(fd, curpos, SEEK_SET);
00213 truelength -= curpos;
00214 #endif
00215 return data;
00216 }
00217
00218 static int update_header(FILE *f)
00219 {
00220 off_t cur,end;
00221 int datalen,filelen,bytes;
00222
00223 cur = ftello(f);
00224 fseek(f, 0, SEEK_END);
00225 end = ftello(f);
00226
00227 bytes = end - 44;
00228 datalen = htoll(bytes);
00229
00230 filelen = htoll(36 + bytes);
00231
00232 if (cur < 0) {
00233 ast_log(LOG_WARNING, "Unable to find our position: %s\n", strerror(errno));
00234 return -1;
00235 }
00236 if (fseek(f, 4, SEEK_SET)) {
00237 ast_log(LOG_WARNING, "Unable to set our position: %s\n", strerror(errno));
00238 return -1;
00239 }
00240 if (fwrite(&filelen, 1, 4, f) != 4) {
00241 ast_log(LOG_WARNING, "Unable to set write file size: %s\n", strerror(errno));
00242 return -1;
00243 }
00244 if (fseek(f, 40, SEEK_SET)) {
00245 ast_log(LOG_WARNING, "Unable to set our position: %s\n", strerror(errno));
00246 return -1;
00247 }
00248 if (fwrite(&datalen, 1, 4, f) != 4) {
00249 ast_log(LOG_WARNING, "Unable to set write datalen: %s\n", strerror(errno));
00250 return -1;
00251 }
00252 if (fseeko(f, cur, SEEK_SET)) {
00253 ast_log(LOG_WARNING, "Unable to return to position: %s\n", strerror(errno));
00254 return -1;
00255 }
00256 return 0;
00257 }
00258
00259 static int write_header(FILE *f)
00260 {
00261 unsigned int hz=htoll(8000);
00262 unsigned int bhz = htoll(16000);
00263 unsigned int hs = htoll(16);
00264 unsigned short fmt = htols(1);
00265 unsigned short chans = htols(1);
00266 unsigned short bysam = htols(2);
00267 unsigned short bisam = htols(16);
00268 unsigned int size = htoll(0);
00269
00270 fseek(f,0,SEEK_SET);
00271 if (fwrite("RIFF", 1, 4, f) != 4) {
00272 ast_log(LOG_WARNING, "Unable to write header\n");
00273 return -1;
00274 }
00275 if (fwrite(&size, 1, 4, f) != 4) {
00276 ast_log(LOG_WARNING, "Unable to write header\n");
00277 return -1;
00278 }
00279 if (fwrite("WAVEfmt ", 1, 8, f) != 8) {
00280 ast_log(LOG_WARNING, "Unable to write header\n");
00281 return -1;
00282 }
00283 if (fwrite(&hs, 1, 4, f) != 4) {
00284 ast_log(LOG_WARNING, "Unable to write header\n");
00285 return -1;
00286 }
00287 if (fwrite(&fmt, 1, 2, f) != 2) {
00288 ast_log(LOG_WARNING, "Unable to write header\n");
00289 return -1;
00290 }
00291 if (fwrite(&chans, 1, 2, f) != 2) {
00292 ast_log(LOG_WARNING, "Unable to write header\n");
00293 return -1;
00294 }
00295 if (fwrite(&hz, 1, 4, f) != 4) {
00296 ast_log(LOG_WARNING, "Unable to write header\n");
00297 return -1;
00298 }
00299 if (fwrite(&bhz, 1, 4, f) != 4) {
00300 ast_log(LOG_WARNING, "Unable to write header\n");
00301 return -1;
00302 }
00303 if (fwrite(&bysam, 1, 2, f) != 2) {
00304 ast_log(LOG_WARNING, "Unable to write header\n");
00305 return -1;
00306 }
00307 if (fwrite(&bisam, 1, 2, f) != 2) {
00308 ast_log(LOG_WARNING, "Unable to write header\n");
00309 return -1;
00310 }
00311 if (fwrite("data", 1, 4, f) != 4) {
00312 ast_log(LOG_WARNING, "Unable to write header\n");
00313 return -1;
00314 }
00315 if (fwrite(&size, 1, 4, f) != 4) {
00316 ast_log(LOG_WARNING, "Unable to write header\n");
00317 return -1;
00318 }
00319 return 0;
00320 }
00321
00322 static int wav_open(struct ast_filestream *s)
00323 {
00324
00325
00326
00327 struct wav_desc *tmp = (struct wav_desc *)s->_private;
00328 if ((tmp->maxlen = check_header(s->f)) < 0)
00329 return -1;
00330 return 0;
00331 }
00332
00333 static int wav_rewrite(struct ast_filestream *s, const char *comment)
00334 {
00335
00336
00337
00338
00339 if (write_header(s->f))
00340 return -1;
00341 return 0;
00342 }
00343
00344 static void wav_close(struct ast_filestream *s)
00345 {
00346 char zero = 0;
00347 struct wav_desc *fs = (struct wav_desc *)s->_private;
00348
00349 if (fs->bytes & 0x1) {
00350 if (!fwrite(&zero, 1, 1, s->f)) {
00351 ast_log(LOG_WARNING, "fwrite() failed: %s\n", strerror(errno));
00352 }
00353 }
00354 }
00355
00356 static struct ast_frame *wav_read(struct ast_filestream *s, int *whennext)
00357 {
00358 int res;
00359 int samples;
00360 int x;
00361 short *tmp;
00362 int bytes = WAV_BUF_SIZE;
00363 off_t here;
00364
00365 struct wav_desc *fs = (struct wav_desc *)s->_private;
00366
00367 here = ftello(s->f);
00368 if (fs->maxlen - here < bytes)
00369 bytes = fs->maxlen - here;
00370 if (bytes < 0)
00371 bytes = 0;
00372
00373 s->fr.frametype = AST_FRAME_VOICE;
00374 s->fr.subclass = AST_FORMAT_SLINEAR;
00375 s->fr.mallocd = 0;
00376 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, bytes);
00377
00378 if ( (res = fread(s->fr.data, 1, s->fr.datalen, s->f)) <= 0 ) {
00379 if (res)
00380 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
00381 return NULL;
00382 }
00383 s->fr.datalen = res;
00384 s->fr.samples = samples = res / 2;
00385
00386 tmp = (short *)(s->fr.data);
00387 #if __BYTE_ORDER == __BIG_ENDIAN
00388
00389 for( x = 0; x < samples; x++)
00390 tmp[x] = (tmp[x] << 8) | ((tmp[x] & 0xff00) >> 8);
00391 #endif
00392
00393 if (fs->needsgain) {
00394 for (x=0; x < samples; x++) {
00395 if (tmp[x] & ((1 << GAIN) - 1)) {
00396
00397
00398 fs->needsgain = 0;
00399 break;
00400 }
00401 }
00402 if (fs->needsgain) {
00403 for (x=0; x < samples; x++)
00404 tmp[x] = tmp[x] >> GAIN;
00405 }
00406 }
00407
00408 *whennext = samples;
00409 return &s->fr;
00410 }
00411
00412 static int wav_write(struct ast_filestream *fs, struct ast_frame *f)
00413 {
00414 int x;
00415 short tmp[8000], *tmpi;
00416 float tmpf;
00417 struct wav_desc *s = (struct wav_desc *)fs->_private;
00418 int res;
00419
00420 if (f->frametype != AST_FRAME_VOICE) {
00421 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
00422 return -1;
00423 }
00424 if (f->subclass != AST_FORMAT_SLINEAR) {
00425 ast_log(LOG_WARNING, "Asked to write non-SLINEAR frame (%d)!\n", f->subclass);
00426 return -1;
00427 }
00428 if (f->datalen > sizeof(tmp)) {
00429 ast_log(LOG_WARNING, "Data length is too long\n");
00430 return -1;
00431 }
00432 if (!f->datalen)
00433 return -1;
00434
00435 #if 0
00436 printf("Data Length: %d\n", f->datalen);
00437 #endif
00438
00439 tmpi = f->data;
00440
00441 for (x=0;x<f->datalen/2;x++) {
00442 tmpf = ((float)tmpi[x]) * ((float)(1 << GAIN));
00443 if (tmpf > 32767.0)
00444 tmpf = 32767.0;
00445 if (tmpf < -32768.0)
00446 tmpf = -32768.0;
00447 tmp[x] = tmpf;
00448 tmp[x] &= ~((1 << GAIN) - 1);
00449
00450 #if __BYTE_ORDER == __BIG_ENDIAN
00451 tmp[x] = (tmp[x] << 8) | ((tmp[x] & 0xff00) >> 8);
00452 #endif
00453
00454 }
00455 if ((res = fwrite(tmp, 1, f->datalen, fs->f)) != f->datalen ) {
00456 ast_log(LOG_WARNING, "Bad write (%d): %s\n", res, strerror(errno));
00457 return -1;
00458 }
00459
00460 s->bytes += f->datalen;
00461 update_header(fs->f);
00462
00463 return 0;
00464
00465 }
00466
00467 static int wav_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
00468 {
00469 off_t min, max, cur, offset = 0, samples;
00470
00471 samples = sample_offset * 2;
00472 min = 44;
00473 cur = ftello(fs->f);
00474 fseeko(fs->f, 0, SEEK_END);
00475 max = ftello(fs->f);
00476 if (whence == SEEK_SET)
00477 offset = samples + min;
00478 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
00479 offset = samples + cur;
00480 else if (whence == SEEK_END)
00481 offset = max - samples;
00482 if (whence != SEEK_FORCECUR) {
00483 offset = (offset > max)?max:offset;
00484 }
00485
00486 offset = (offset < min)?min:offset;
00487 return fseeko(fs->f, offset, SEEK_SET);
00488 }
00489
00490 static int wav_trunc(struct ast_filestream *fs)
00491 {
00492 if (ftruncate(fileno(fs->f), ftello(fs->f)))
00493 return -1;
00494 return update_header(fs->f);
00495 }
00496
00497 static off_t wav_tell(struct ast_filestream *fs)
00498 {
00499 off_t offset;
00500 offset = ftello(fs->f);
00501
00502 return (offset - 44)/2;
00503 }
00504
00505 static const struct ast_format wav_f = {
00506 .name = "wav",
00507 .exts = "wav",
00508 .format = AST_FORMAT_SLINEAR,
00509 .open = wav_open,
00510 .rewrite = wav_rewrite,
00511 .write = wav_write,
00512 .seek = wav_seek,
00513 .trunc = wav_trunc,
00514 .tell = wav_tell,
00515 .read = wav_read,
00516 .close = wav_close,
00517 .buf_size = WAV_BUF_SIZE + AST_FRIENDLY_OFFSET,
00518 .desc_size = sizeof(struct wav_desc),
00519 };
00520
00521 static int load_module(void)
00522 {
00523 return ast_format_register(&wav_f);
00524 }
00525
00526 static int unload_module(void)
00527 {
00528 return ast_format_unregister(wav_f.name);
00529 }
00530
00531 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Microsoft WAV format (8000Hz Signed Linear)");