Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * Original author: |
| 7 | * David Clark <vdc1048 @ tx.rr.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | #include <pjmedia/wav_playlist.h> |
| 24 | #include <pjmedia/errno.h> |
| 25 | #include <pjmedia/wave.h> |
| 26 | #include <pj/assert.h> |
| 27 | #include <pj/file_access.h> |
| 28 | #include <pj/file_io.h> |
| 29 | #include <pj/log.h> |
| 30 | #include <pj/pool.h> |
| 31 | #include <pj/string.h> |
| 32 | |
| 33 | #define THIS_FILE "wav_playlist.c" |
| 34 | |
| 35 | #define SIGNATURE PJMEDIA_SIG_PORT_WAV_PLAYLIST |
| 36 | #define BYTES_PER_SAMPLE 2 |
| 37 | |
| 38 | |
| 39 | #if 1 |
| 40 | # define TRACE_(x) PJ_LOG(4,x) |
| 41 | #else |
| 42 | # define TRACE_(x) |
| 43 | #endif |
| 44 | |
| 45 | #if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0 |
| 46 | static void samples_to_host(pj_int16_t *samples, unsigned count) |
| 47 | { |
| 48 | unsigned i; |
| 49 | for (i=0; i<count; ++i) { |
| 50 | samples[i] = pj_swap16(samples[i]); |
| 51 | } |
| 52 | } |
| 53 | #else |
| 54 | # define samples_to_host(samples,count) |
| 55 | #endif |
| 56 | |
| 57 | |
| 58 | struct playlist_port |
| 59 | { |
| 60 | pjmedia_port base; |
| 61 | unsigned options; |
| 62 | pj_bool_t eof; |
| 63 | pj_uint32_t bufsize; |
| 64 | char *buf; |
| 65 | char *readpos; |
| 66 | |
| 67 | pj_off_t *fsize_list; |
| 68 | unsigned *start_data_list; |
| 69 | pj_off_t *fpos_list; |
| 70 | pj_oshandle_t *fd_list; /* list of file descriptors */ |
| 71 | int current_file; /* index of current file. */ |
| 72 | int max_file; /* how many files. */ |
| 73 | |
| 74 | pj_status_t (*cb)(pjmedia_port*, void*); |
| 75 | }; |
| 76 | |
| 77 | |
| 78 | static pj_status_t file_list_get_frame(pjmedia_port *this_port, |
| 79 | pjmedia_frame *frame); |
| 80 | static pj_status_t file_list_on_destroy(pjmedia_port *this_port); |
| 81 | |
| 82 | |
| 83 | static struct playlist_port *create_file_list_port(pj_pool_t *pool, |
| 84 | const pj_str_t *name) |
| 85 | { |
| 86 | struct playlist_port *port; |
| 87 | |
| 88 | port = PJ_POOL_ZALLOC_T(pool, struct playlist_port); |
| 89 | if (!port) |
| 90 | return NULL; |
| 91 | |
| 92 | /* Put in default values. |
| 93 | * These will be overriden once the file is read. |
| 94 | */ |
| 95 | pjmedia_port_info_init(&port->base.info, name, SIGNATURE, |
| 96 | 8000, 1, 16, 80); |
| 97 | |
| 98 | port->base.get_frame = &file_list_get_frame; |
| 99 | port->base.on_destroy = &file_list_on_destroy; |
| 100 | |
| 101 | return port; |
| 102 | } |
| 103 | |
| 104 | |
| 105 | /* |
| 106 | * Fill buffer for file_list operations. |
| 107 | */ |
| 108 | static pj_status_t file_fill_buffer(struct playlist_port *fport) |
| 109 | { |
| 110 | pj_uint32_t size_left = fport->bufsize; |
| 111 | pj_uint32_t size_to_read; |
| 112 | pj_ssize_t size; |
| 113 | pj_status_t status; |
| 114 | int current_file = fport->current_file; |
| 115 | |
| 116 | /* Can't read file if EOF and loop flag is disabled */ |
| 117 | if (fport->eof) |
| 118 | return PJ_EEOF; |
| 119 | |
| 120 | while (size_left > 0) |
| 121 | { |
| 122 | /* Calculate how many bytes to read in this run. */ |
| 123 | size = size_to_read = size_left; |
| 124 | status = pj_file_read(fport->fd_list[current_file], |
| 125 | &fport->buf[fport->bufsize-size_left], |
| 126 | &size); |
| 127 | if (status != PJ_SUCCESS) |
| 128 | return status; |
| 129 | |
| 130 | if (size < 0) |
| 131 | { |
| 132 | /* Should return more appropriate error code here.. */ |
| 133 | return PJ_ECANCELLED; |
| 134 | } |
| 135 | |
| 136 | size_left -= (pj_uint32_t)size; |
| 137 | fport->fpos_list[current_file] += size; |
| 138 | |
| 139 | /* If size is less than size_to_read, it indicates that we've |
| 140 | * encountered EOF. Rewind the file. |
| 141 | */ |
| 142 | if (size < (pj_ssize_t)size_to_read) |
| 143 | { |
| 144 | /* Rewind the file for the next iteration */ |
| 145 | fport->fpos_list[current_file] = |
| 146 | fport->start_data_list[current_file]; |
| 147 | pj_file_setpos(fport->fd_list[current_file], |
| 148 | fport->fpos_list[current_file], PJ_SEEK_SET); |
| 149 | |
| 150 | /* Move to next file */ |
| 151 | current_file++; |
| 152 | fport->current_file = current_file; |
| 153 | |
| 154 | if (fport->current_file == fport->max_file) |
| 155 | { |
| 156 | /* Clear the remaining part of the buffer first, to prevent |
| 157 | * old samples from being played. If the playback restarts, |
| 158 | * this will be overwritten by new reading. |
| 159 | */ |
| 160 | if (size_left > 0) { |
| 161 | pj_bzero(&fport->buf[fport->bufsize-size_left], |
| 162 | size_left); |
| 163 | } |
| 164 | |
| 165 | /* All files have been played. Call callback, if any. */ |
| 166 | if (fport->cb) |
| 167 | { |
| 168 | PJ_LOG(5,(THIS_FILE, |
| 169 | "File port %.*s EOF, calling callback", |
| 170 | (int)fport->base.info.name.slen, |
| 171 | fport->base.info.name.ptr)); |
| 172 | |
| 173 | fport->eof = PJ_TRUE; |
| 174 | |
| 175 | status = (*fport->cb)(&fport->base, |
| 176 | fport->base.port_data.pdata); |
| 177 | |
| 178 | if (status != PJ_SUCCESS) |
| 179 | { |
| 180 | /* This will crash if file port is destroyed in the |
| 181 | * callback, that's why we set the eof flag before |
| 182 | * calling the callback: |
| 183 | fport->eof = PJ_TRUE; |
| 184 | */ |
| 185 | return status; |
| 186 | } |
| 187 | |
| 188 | fport->eof = PJ_FALSE; |
| 189 | } |
| 190 | |
| 191 | |
| 192 | if (fport->options & PJMEDIA_FILE_NO_LOOP) |
| 193 | { |
| 194 | PJ_LOG(5,(THIS_FILE, "File port %.*s EOF, stopping..", |
| 195 | (int)fport->base.info.name.slen, |
| 196 | fport->base.info.name.ptr)); |
| 197 | fport->eof = PJ_TRUE; |
| 198 | return PJ_EEOF; |
| 199 | } |
| 200 | else |
| 201 | { |
| 202 | PJ_LOG(5,(THIS_FILE, "File port %.*s EOF, rewinding..", |
| 203 | (int)fport->base.info.name.slen, |
| 204 | fport->base.info.name.ptr)); |
| 205 | |
| 206 | /* start with first file again. */ |
| 207 | fport->current_file = current_file = 0; |
| 208 | fport->fpos_list[0] = fport->start_data_list[0]; |
| 209 | pj_file_setpos(fport->fd_list[0], fport->fpos_list[0], |
| 210 | PJ_SEEK_SET); |
| 211 | } |
| 212 | |
| 213 | } /* if current_file == max_file */ |
| 214 | |
| 215 | } /* size < size_to_read */ |
| 216 | |
| 217 | } /* while () */ |
| 218 | |
| 219 | /* Convert samples to host rep */ |
| 220 | samples_to_host((pj_int16_t*)fport->buf, fport->bufsize/BYTES_PER_SAMPLE); |
| 221 | |
| 222 | return PJ_SUCCESS; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | /* |
| 227 | * Create wave list player. |
| 228 | */ |
| 229 | PJ_DEF(pj_status_t) pjmedia_wav_playlist_create(pj_pool_t *pool, |
| 230 | const pj_str_t *port_label, |
| 231 | const pj_str_t file_list[], |
| 232 | int file_count, |
| 233 | unsigned ptime, |
| 234 | unsigned options, |
| 235 | pj_ssize_t buff_size, |
| 236 | pjmedia_port **p_port) |
| 237 | { |
| 238 | struct playlist_port *fport; |
| 239 | pjmedia_audio_format_detail *afd; |
| 240 | pj_off_t pos; |
| 241 | pj_status_t status; |
| 242 | int index; |
| 243 | pj_bool_t has_wave_info = PJ_FALSE; |
| 244 | pj_str_t tmp_port_label; |
| 245 | char filename[PJ_MAXPATH]; /* filename for open operations. */ |
| 246 | |
| 247 | |
| 248 | /* Check arguments. */ |
| 249 | PJ_ASSERT_RETURN(pool && file_list && file_count && p_port, PJ_EINVAL); |
| 250 | |
| 251 | /* Normalize port_label */ |
| 252 | if (port_label == NULL || port_label->slen == 0) { |
| 253 | tmp_port_label = pj_str("WAV playlist"); |
| 254 | port_label = &tmp_port_label; |
| 255 | } |
| 256 | |
| 257 | /* Be sure all files exist */ |
| 258 | for (index=0; index<file_count; index++) { |
| 259 | |
| 260 | PJ_ASSERT_RETURN(file_list[index].slen < PJ_MAXPATH, PJ_ENAMETOOLONG); |
| 261 | |
| 262 | pj_memcpy(filename, file_list[index].ptr, file_list[index].slen); |
| 263 | filename[file_list[index].slen] = '\0'; |
| 264 | |
| 265 | /* Check the file really exists. */ |
| 266 | if (!pj_file_exists(filename)) { |
| 267 | PJ_LOG(4,(THIS_FILE, |
| 268 | "WAV playlist error: file '%s' not found", |
| 269 | filename)); |
| 270 | return PJ_ENOTFOUND; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | /* Normalize ptime */ |
| 275 | if (ptime == 0) |
| 276 | ptime = 20; |
| 277 | |
| 278 | /* Create fport instance. */ |
| 279 | fport = create_file_list_port(pool, port_label); |
| 280 | if (!fport) { |
| 281 | return PJ_ENOMEM; |
| 282 | } |
| 283 | |
| 284 | afd = pjmedia_format_get_audio_format_detail(&fport->base.info.fmt, 1); |
| 285 | |
| 286 | /* start with the first file. */ |
| 287 | fport->current_file = 0; |
| 288 | fport->max_file = file_count; |
| 289 | |
| 290 | /* Create file descriptor list */ |
| 291 | fport->fd_list = (pj_oshandle_t*) |
| 292 | pj_pool_zalloc(pool, sizeof(pj_oshandle_t)*file_count); |
| 293 | if (!fport->fd_list) { |
| 294 | return PJ_ENOMEM; |
| 295 | } |
| 296 | |
| 297 | /* Create file size list */ |
| 298 | fport->fsize_list = (pj_off_t*) |
| 299 | pj_pool_alloc(pool, sizeof(pj_off_t)*file_count); |
| 300 | if (!fport->fsize_list) { |
| 301 | return PJ_ENOMEM; |
| 302 | } |
| 303 | |
| 304 | /* Create start of WAVE data list */ |
| 305 | fport->start_data_list = (unsigned*) |
| 306 | pj_pool_alloc(pool, sizeof(unsigned)*file_count); |
| 307 | if (!fport->start_data_list) { |
| 308 | return PJ_ENOMEM; |
| 309 | } |
| 310 | |
| 311 | /* Create file position list */ |
| 312 | fport->fpos_list = (pj_off_t*) |
| 313 | pj_pool_alloc(pool, sizeof(pj_off_t)*file_count); |
| 314 | if (!fport->fpos_list) { |
| 315 | return PJ_ENOMEM; |
| 316 | } |
| 317 | |
| 318 | /* Create file buffer once for this operation. |
| 319 | */ |
| 320 | if (buff_size < 1) buff_size = PJMEDIA_FILE_PORT_BUFSIZE; |
| 321 | fport->bufsize = (pj_uint32_t)buff_size; |
| 322 | |
| 323 | |
| 324 | /* Create buffer. */ |
| 325 | fport->buf = (char*) pj_pool_alloc(pool, fport->bufsize); |
| 326 | if (!fport->buf) { |
| 327 | return PJ_ENOMEM; |
| 328 | } |
| 329 | |
| 330 | /* Initialize port */ |
| 331 | fport->options = options; |
| 332 | fport->readpos = fport->buf; |
| 333 | |
| 334 | |
| 335 | /* ok run this for all files to be sure all are good for playback. */ |
| 336 | for (index=file_count-1; index>=0; index--) { |
| 337 | |
| 338 | pjmedia_wave_hdr wavehdr; |
| 339 | pj_ssize_t size_to_read, size_read; |
| 340 | |
| 341 | /* we end with the last one so we are good to go if still in function*/ |
| 342 | pj_memcpy(filename, file_list[index].ptr, file_list[index].slen); |
| 343 | filename[file_list[index].slen] = '\0'; |
| 344 | |
| 345 | /* Get the file size. */ |
| 346 | fport->current_file = index; |
| 347 | fport->fsize_list[index] = pj_file_size(filename); |
| 348 | |
| 349 | /* Size must be more than WAVE header size */ |
| 350 | if (fport->fsize_list[index] <= sizeof(pjmedia_wave_hdr)) { |
| 351 | status = PJMEDIA_ENOTVALIDWAVE; |
| 352 | goto on_error; |
| 353 | } |
| 354 | |
| 355 | /* Open file. */ |
| 356 | status = pj_file_open( pool, filename, PJ_O_RDONLY, |
| 357 | &fport->fd_list[index]); |
| 358 | if (status != PJ_SUCCESS) |
| 359 | goto on_error; |
| 360 | |
| 361 | /* Read the file header plus fmt header only. */ |
| 362 | size_read = size_to_read = sizeof(wavehdr) - 8; |
| 363 | status = pj_file_read( fport->fd_list[index], &wavehdr, &size_read); |
| 364 | if (status != PJ_SUCCESS) { |
| 365 | goto on_error; |
| 366 | } |
| 367 | |
| 368 | if (size_read != size_to_read) { |
| 369 | status = PJMEDIA_ENOTVALIDWAVE; |
| 370 | goto on_error; |
| 371 | } |
| 372 | |
| 373 | /* Normalize WAVE header fields values from little-endian to host |
| 374 | * byte order. |
| 375 | */ |
| 376 | pjmedia_wave_hdr_file_to_host(&wavehdr); |
| 377 | |
| 378 | /* Validate WAVE file. */ |
| 379 | if (wavehdr.riff_hdr.riff != PJMEDIA_RIFF_TAG || |
| 380 | wavehdr.riff_hdr.wave != PJMEDIA_WAVE_TAG || |
| 381 | wavehdr.fmt_hdr.fmt != PJMEDIA_FMT_TAG) |
| 382 | { |
| 383 | TRACE_((THIS_FILE, |
| 384 | "actual value|expected riff=%x|%x, wave=%x|%x fmt=%x|%x", |
| 385 | wavehdr.riff_hdr.riff, PJMEDIA_RIFF_TAG, |
| 386 | wavehdr.riff_hdr.wave, PJMEDIA_WAVE_TAG, |
| 387 | wavehdr.fmt_hdr.fmt, PJMEDIA_FMT_TAG)); |
| 388 | status = PJMEDIA_ENOTVALIDWAVE; |
| 389 | goto on_error; |
| 390 | } |
| 391 | |
| 392 | /* Must be PCM with 16bits per sample */ |
| 393 | if (wavehdr.fmt_hdr.fmt_tag != 1 || |
| 394 | wavehdr.fmt_hdr.bits_per_sample != 16) |
| 395 | { |
| 396 | status = PJMEDIA_EWAVEUNSUPP; |
| 397 | goto on_error; |
| 398 | } |
| 399 | |
| 400 | /* Block align must be 2*nchannels */ |
| 401 | if (wavehdr.fmt_hdr.block_align != |
| 402 | wavehdr.fmt_hdr.nchan * BYTES_PER_SAMPLE) |
| 403 | { |
| 404 | status = PJMEDIA_EWAVEUNSUPP; |
| 405 | goto on_error; |
| 406 | } |
| 407 | |
| 408 | /* If length of fmt_header is greater than 16, skip the remaining |
| 409 | * fmt header data. |
| 410 | */ |
| 411 | if (wavehdr.fmt_hdr.len > 16) { |
| 412 | size_to_read = wavehdr.fmt_hdr.len - 16; |
| 413 | status = pj_file_setpos(fport->fd_list[index], size_to_read, |
| 414 | PJ_SEEK_CUR); |
| 415 | if (status != PJ_SUCCESS) { |
| 416 | goto on_error; |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | /* Repeat reading the WAVE file until we have 'data' chunk */ |
| 421 | for (;;) { |
| 422 | pjmedia_wave_subchunk subchunk; |
| 423 | size_read = 8; |
| 424 | status = pj_file_read(fport->fd_list[index], &subchunk, |
| 425 | &size_read); |
| 426 | if (status != PJ_SUCCESS || size_read != 8) { |
| 427 | status = PJMEDIA_EWAVETOOSHORT; |
| 428 | goto on_error; |
| 429 | } |
| 430 | |
| 431 | /* Normalize endianness */ |
| 432 | PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(&subchunk); |
| 433 | |
| 434 | /* Break if this is "data" chunk */ |
| 435 | if (subchunk.id == PJMEDIA_DATA_TAG) { |
| 436 | wavehdr.data_hdr.data = PJMEDIA_DATA_TAG; |
| 437 | wavehdr.data_hdr.len = subchunk.len; |
| 438 | break; |
| 439 | } |
| 440 | |
| 441 | /* Otherwise skip the chunk contents */ |
| 442 | size_to_read = subchunk.len; |
| 443 | status = pj_file_setpos(fport->fd_list[index], size_to_read, |
| 444 | PJ_SEEK_CUR); |
| 445 | if (status != PJ_SUCCESS) { |
| 446 | goto on_error; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | /* Current file position now points to start of data */ |
| 451 | status = pj_file_getpos(fport->fd_list[index], &pos); |
| 452 | fport->start_data_list[index] = (unsigned)pos; |
| 453 | |
| 454 | /* Validate length. */ |
| 455 | if (wavehdr.data_hdr.len != fport->fsize_list[index] - |
| 456 | fport->start_data_list[index]) |
| 457 | { |
| 458 | status = PJMEDIA_EWAVEUNSUPP; |
| 459 | goto on_error; |
| 460 | } |
| 461 | if (wavehdr.data_hdr.len < 400) { |
| 462 | status = PJMEDIA_EWAVETOOSHORT; |
| 463 | goto on_error; |
| 464 | } |
| 465 | |
| 466 | /* It seems like we have a valid WAVE file. */ |
| 467 | |
| 468 | /* Update port info if we don't have one, otherwise check |
| 469 | * that the WAV file has the same attributes as previous files. |
| 470 | */ |
| 471 | if (!has_wave_info) { |
| 472 | afd->channel_count = wavehdr.fmt_hdr.nchan; |
| 473 | afd->clock_rate = wavehdr.fmt_hdr.sample_rate; |
| 474 | afd->bits_per_sample = wavehdr.fmt_hdr.bits_per_sample; |
| 475 | afd->frame_time_usec = ptime * 1000; |
| 476 | afd->avg_bps = afd->max_bps = afd->clock_rate * |
| 477 | afd->channel_count * |
| 478 | afd->bits_per_sample; |
| 479 | |
| 480 | has_wave_info = PJ_TRUE; |
| 481 | |
| 482 | } else { |
| 483 | |
| 484 | /* Check that this file has the same characteristics as the other |
| 485 | * files. |
| 486 | */ |
| 487 | if (wavehdr.fmt_hdr.nchan != afd->channel_count || |
| 488 | wavehdr.fmt_hdr.sample_rate != afd->clock_rate || |
| 489 | wavehdr.fmt_hdr.bits_per_sample != afd->bits_per_sample) |
| 490 | { |
| 491 | /* This file has different characteristics than the other |
| 492 | * files. |
| 493 | */ |
| 494 | PJ_LOG(4,(THIS_FILE, |
| 495 | "WAV playlist error: file '%s' has differrent number" |
| 496 | " of channels, sample rate, or bits per sample", |
| 497 | filename)); |
| 498 | status = PJMEDIA_EWAVEUNSUPP; |
| 499 | goto on_error; |
| 500 | } |
| 501 | |
| 502 | } |
| 503 | |
| 504 | |
| 505 | /* Set initial position of the file. */ |
| 506 | fport->fpos_list[index] = fport->start_data_list[index]; |
| 507 | } |
| 508 | |
| 509 | /* Fill up the buffer. */ |
| 510 | status = file_fill_buffer(fport); |
| 511 | if (status != PJ_SUCCESS) { |
| 512 | goto on_error; |
| 513 | } |
| 514 | |
| 515 | /* Done. */ |
| 516 | |
| 517 | *p_port = &fport->base; |
| 518 | |
| 519 | PJ_LOG(4,(THIS_FILE, |
| 520 | "WAV playlist '%.*s' created: samp.rate=%d, ch=%d, bufsize=%uKB", |
| 521 | (int)port_label->slen, |
| 522 | port_label->ptr, |
| 523 | afd->clock_rate, |
| 524 | afd->channel_count, |
| 525 | fport->bufsize / 1000)); |
| 526 | |
| 527 | return PJ_SUCCESS; |
| 528 | |
| 529 | on_error: |
| 530 | for (index=0; index<file_count; ++index) { |
| 531 | if (fport->fd_list[index] != 0) |
| 532 | pj_file_close(fport->fd_list[index]); |
| 533 | } |
| 534 | |
| 535 | return status; |
| 536 | } |
| 537 | |
| 538 | |
| 539 | /* |
| 540 | * Register a callback to be called when the file reading has reached the |
| 541 | * end of the last file. |
| 542 | */ |
| 543 | PJ_DEF(pj_status_t) pjmedia_wav_playlist_set_eof_cb(pjmedia_port *port, |
| 544 | void *user_data, |
| 545 | pj_status_t (*cb)(pjmedia_port *port, |
| 546 | void *usr_data)) |
| 547 | { |
| 548 | struct playlist_port *fport; |
| 549 | |
| 550 | /* Sanity check */ |
| 551 | PJ_ASSERT_RETURN(port, PJ_EINVAL); |
| 552 | |
| 553 | /* Check that this is really a playlist port */ |
| 554 | PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, PJ_EINVALIDOP); |
| 555 | |
| 556 | fport = (struct playlist_port*) port; |
| 557 | |
| 558 | fport->base.port_data.pdata = user_data; |
| 559 | fport->cb = cb; |
| 560 | |
| 561 | return PJ_SUCCESS; |
| 562 | } |
| 563 | |
| 564 | |
| 565 | /* |
| 566 | * Get frame from file for file_list operation |
| 567 | */ |
| 568 | static pj_status_t file_list_get_frame(pjmedia_port *this_port, |
| 569 | pjmedia_frame *frame) |
| 570 | { |
| 571 | struct playlist_port *fport = (struct playlist_port*)this_port; |
| 572 | pj_size_t frame_size; |
| 573 | pj_status_t status; |
| 574 | |
| 575 | pj_assert(fport->base.info.signature == SIGNATURE); |
| 576 | |
| 577 | //frame_size = fport->base.info.bytes_per_frame; |
| 578 | //pj_assert(frame->size == frame_size); |
| 579 | frame_size = frame->size; |
| 580 | |
| 581 | /* Copy frame from buffer. */ |
| 582 | frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 583 | frame->size = frame_size; |
| 584 | frame->timestamp.u64 = 0; |
| 585 | |
| 586 | if (fport->readpos + frame_size <= fport->buf + fport->bufsize) { |
| 587 | |
| 588 | /* Read contiguous buffer. */ |
| 589 | pj_memcpy(frame->buf, fport->readpos, frame_size); |
| 590 | |
| 591 | /* Fill up the buffer if all has been read. */ |
| 592 | fport->readpos += frame_size; |
| 593 | if (fport->readpos == fport->buf + fport->bufsize) { |
| 594 | fport->readpos = fport->buf; |
| 595 | |
| 596 | status = file_fill_buffer(fport); |
| 597 | if (status != PJ_SUCCESS) { |
| 598 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 599 | frame->size = 0; |
| 600 | return status; |
| 601 | } |
| 602 | } |
| 603 | } else { |
| 604 | unsigned endread; |
| 605 | |
| 606 | /* Split read. |
| 607 | * First stage: read until end of buffer. |
| 608 | */ |
| 609 | endread = (unsigned)((fport->buf+fport->bufsize) - fport->readpos); |
| 610 | pj_memcpy(frame->buf, fport->readpos, endread); |
| 611 | |
| 612 | /* Second stage: fill up buffer, and read from the start of buffer. */ |
| 613 | status = file_fill_buffer(fport); |
| 614 | if (status != PJ_SUCCESS) { |
| 615 | pj_bzero(((char*)frame->buf)+endread, frame_size-endread); |
| 616 | return status; |
| 617 | } |
| 618 | |
| 619 | pj_memcpy(((char*)frame->buf)+endread, fport->buf, frame_size-endread); |
| 620 | fport->readpos = fport->buf + (frame_size - endread); |
| 621 | } |
| 622 | |
| 623 | return PJ_SUCCESS; |
| 624 | } |
| 625 | |
| 626 | |
| 627 | /* |
| 628 | * Destroy port. |
| 629 | */ |
| 630 | static pj_status_t file_list_on_destroy(pjmedia_port *this_port) |
| 631 | { |
| 632 | struct playlist_port *fport = (struct playlist_port*) this_port; |
| 633 | int index; |
| 634 | |
| 635 | pj_assert(this_port->info.signature == SIGNATURE); |
| 636 | |
| 637 | for (index=0; index<fport->max_file; index++) |
| 638 | pj_file_close(fport->fd_list[index]); |
| 639 | |
| 640 | return PJ_SUCCESS; |
| 641 | } |
| 642 | |