Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [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 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia/wav_port.h> |
| 21 | #include <pjmedia/alaw_ulaw.h> |
| 22 | #include <pjmedia/errno.h> |
| 23 | #include <pjmedia/wave.h> |
| 24 | #include <pj/assert.h> |
| 25 | #include <pj/file_access.h> |
| 26 | #include <pj/file_io.h> |
| 27 | #include <pj/log.h> |
| 28 | #include <pj/pool.h> |
| 29 | #include <pj/string.h> |
| 30 | |
| 31 | |
| 32 | #define THIS_FILE "wav_player.c" |
| 33 | |
| 34 | |
| 35 | #define SIGNATURE PJMEDIA_SIG_PORT_WAV_PLAYER |
| 36 | #define BITS_PER_SAMPLE 16 |
| 37 | |
| 38 | #if 1 |
| 39 | # define TRACE_(x) PJ_LOG(4,x) |
| 40 | #else |
| 41 | # define TRACE_(x) |
| 42 | #endif |
| 43 | |
| 44 | #if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0 |
| 45 | static void samples_to_host(pj_int16_t *samples, unsigned count) |
| 46 | { |
| 47 | unsigned i; |
| 48 | for (i=0; i<count; ++i) { |
| 49 | samples[i] = pj_swap16(samples[i]); |
| 50 | } |
| 51 | } |
| 52 | #else |
| 53 | # define samples_to_host(samples,count) |
| 54 | #endif |
| 55 | |
| 56 | struct file_reader_port |
| 57 | { |
| 58 | pjmedia_port base; |
| 59 | unsigned options; |
| 60 | pjmedia_wave_fmt_tag fmt_tag; |
| 61 | pj_uint16_t bytes_per_sample; |
| 62 | pj_bool_t eof; |
| 63 | pj_uint32_t bufsize; |
| 64 | char *buf; |
| 65 | char *readpos; |
| 66 | char *eofpos; |
| 67 | |
| 68 | pj_off_t fsize; |
| 69 | unsigned start_data; |
| 70 | unsigned data_len; |
| 71 | unsigned data_left; |
| 72 | pj_off_t fpos; |
| 73 | pj_oshandle_t fd; |
| 74 | |
| 75 | pj_status_t (*cb)(pjmedia_port*, void*); |
| 76 | }; |
| 77 | |
| 78 | |
| 79 | static pj_status_t file_get_frame(pjmedia_port *this_port, |
| 80 | pjmedia_frame *frame); |
| 81 | static pj_status_t file_on_destroy(pjmedia_port *this_port); |
| 82 | |
| 83 | static struct file_reader_port *create_file_port(pj_pool_t *pool) |
| 84 | { |
| 85 | const pj_str_t name = pj_str("file"); |
| 86 | struct file_reader_port *port; |
| 87 | |
| 88 | port = PJ_POOL_ZALLOC_T(pool, struct file_reader_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_get_frame; |
| 99 | port->base.on_destroy = &file_on_destroy; |
| 100 | |
| 101 | |
| 102 | return port; |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * Fill buffer. |
| 107 | */ |
| 108 | static pj_status_t fill_buffer(struct file_reader_port *fport) |
| 109 | { |
| 110 | pj_uint32_t size_left = fport->bufsize; |
| 111 | unsigned size_to_read; |
| 112 | pj_ssize_t size; |
| 113 | pj_status_t status; |
| 114 | |
| 115 | fport->eofpos = NULL; |
| 116 | |
| 117 | while (size_left > 0) { |
| 118 | |
| 119 | /* Calculate how many bytes to read in this run. */ |
| 120 | size = size_to_read = size_left; |
| 121 | status = pj_file_read(fport->fd, |
| 122 | &fport->buf[fport->bufsize-size_left], |
| 123 | &size); |
| 124 | if (status != PJ_SUCCESS) |
| 125 | return status; |
| 126 | if (size < 0) { |
| 127 | /* Should return more appropriate error code here.. */ |
| 128 | return PJ_ECANCELLED; |
| 129 | } |
| 130 | |
| 131 | if (size > (pj_ssize_t)fport->data_left) { |
| 132 | /* We passed the end of the data chunk, |
| 133 | * only count the portion read from the data chunk. |
| 134 | */ |
| 135 | size = (pj_ssize_t)fport->data_left; |
| 136 | } |
| 137 | |
| 138 | size_left -= (pj_uint32_t)size; |
| 139 | fport->data_left -= (pj_uint32_t)size; |
| 140 | fport->fpos += size; |
| 141 | |
| 142 | /* If size is less than size_to_read, it indicates that we've |
| 143 | * encountered EOF. Rewind the file. |
| 144 | */ |
| 145 | if (size < (pj_ssize_t)size_to_read) { |
| 146 | fport->eof = PJ_TRUE; |
| 147 | fport->eofpos = fport->buf + fport->bufsize - size_left; |
| 148 | |
| 149 | if (fport->options & PJMEDIA_FILE_NO_LOOP) { |
| 150 | /* Zero remaining buffer */ |
| 151 | if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| 152 | pj_bzero(fport->eofpos, size_left); |
| 153 | } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| 154 | int val = pjmedia_linear2ulaw(0); |
| 155 | pj_memset(fport->eofpos, val, size_left); |
| 156 | } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) { |
| 157 | int val = pjmedia_linear2alaw(0); |
| 158 | pj_memset(fport->eofpos, val, size_left); |
| 159 | } |
| 160 | size_left = 0; |
| 161 | } |
| 162 | |
| 163 | /* Rewind file */ |
| 164 | fport->fpos = fport->start_data; |
| 165 | pj_file_setpos( fport->fd, fport->fpos, PJ_SEEK_SET); |
| 166 | fport->data_left = fport->data_len; |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* Convert samples to host rep */ |
| 171 | samples_to_host((pj_int16_t*)fport->buf, |
| 172 | fport->bufsize/fport->bytes_per_sample); |
| 173 | |
| 174 | return PJ_SUCCESS; |
| 175 | } |
| 176 | |
| 177 | |
| 178 | /* |
| 179 | * Create WAVE player port. |
| 180 | */ |
| 181 | PJ_DEF(pj_status_t) pjmedia_wav_player_port_create( pj_pool_t *pool, |
| 182 | const char *filename, |
| 183 | unsigned ptime, |
| 184 | unsigned options, |
| 185 | pj_ssize_t buff_size, |
| 186 | pjmedia_port **p_port ) |
| 187 | { |
| 188 | pjmedia_wave_hdr wave_hdr; |
| 189 | pj_ssize_t size_to_read, size_read; |
| 190 | struct file_reader_port *fport; |
| 191 | pjmedia_audio_format_detail *ad; |
| 192 | pj_off_t pos; |
| 193 | pj_str_t name; |
| 194 | unsigned samples_per_frame; |
| 195 | pj_status_t status = PJ_SUCCESS; |
| 196 | |
| 197 | |
| 198 | /* Check arguments. */ |
| 199 | PJ_ASSERT_RETURN(pool && filename && p_port, PJ_EINVAL); |
| 200 | |
| 201 | /* Check the file really exists. */ |
| 202 | if (!pj_file_exists(filename)) { |
| 203 | return PJ_ENOTFOUND; |
| 204 | } |
| 205 | |
| 206 | /* Normalize ptime */ |
| 207 | if (ptime == 0) |
| 208 | ptime = 20; |
| 209 | |
| 210 | /* Normalize buff_size */ |
| 211 | if (buff_size < 1) buff_size = PJMEDIA_FILE_PORT_BUFSIZE; |
| 212 | |
| 213 | |
| 214 | /* Create fport instance. */ |
| 215 | fport = create_file_port(pool); |
| 216 | if (!fport) { |
| 217 | return PJ_ENOMEM; |
| 218 | } |
| 219 | |
| 220 | |
| 221 | /* Get the file size. */ |
| 222 | fport->fsize = pj_file_size(filename); |
| 223 | |
| 224 | /* Size must be more than WAVE header size */ |
| 225 | if (fport->fsize <= sizeof(pjmedia_wave_hdr)) { |
| 226 | return PJMEDIA_ENOTVALIDWAVE; |
| 227 | } |
| 228 | |
| 229 | /* Open file. */ |
| 230 | status = pj_file_open( pool, filename, PJ_O_RDONLY, &fport->fd); |
| 231 | if (status != PJ_SUCCESS) |
| 232 | return status; |
| 233 | |
| 234 | /* Read the file header plus fmt header only. */ |
| 235 | size_read = size_to_read = sizeof(wave_hdr) - 8; |
| 236 | status = pj_file_read( fport->fd, &wave_hdr, &size_read); |
| 237 | if (status != PJ_SUCCESS) { |
| 238 | pj_file_close(fport->fd); |
| 239 | return status; |
| 240 | } |
| 241 | if (size_read != size_to_read) { |
| 242 | pj_file_close(fport->fd); |
| 243 | return PJMEDIA_ENOTVALIDWAVE; |
| 244 | } |
| 245 | |
| 246 | /* Normalize WAVE header fields values from little-endian to host |
| 247 | * byte order. |
| 248 | */ |
| 249 | pjmedia_wave_hdr_file_to_host(&wave_hdr); |
| 250 | |
| 251 | /* Validate WAVE file. */ |
| 252 | if (wave_hdr.riff_hdr.riff != PJMEDIA_RIFF_TAG || |
| 253 | wave_hdr.riff_hdr.wave != PJMEDIA_WAVE_TAG || |
| 254 | wave_hdr.fmt_hdr.fmt != PJMEDIA_FMT_TAG) |
| 255 | { |
| 256 | pj_file_close(fport->fd); |
| 257 | TRACE_((THIS_FILE, |
| 258 | "actual value|expected riff=%x|%x, wave=%x|%x fmt=%x|%x", |
| 259 | wave_hdr.riff_hdr.riff, PJMEDIA_RIFF_TAG, |
| 260 | wave_hdr.riff_hdr.wave, PJMEDIA_WAVE_TAG, |
| 261 | wave_hdr.fmt_hdr.fmt, PJMEDIA_FMT_TAG)); |
| 262 | return PJMEDIA_ENOTVALIDWAVE; |
| 263 | } |
| 264 | |
| 265 | /* Validate format and its attributes (i.e: bits per sample, block align) */ |
| 266 | switch (wave_hdr.fmt_hdr.fmt_tag) { |
| 267 | case PJMEDIA_WAVE_FMT_TAG_PCM: |
| 268 | if (wave_hdr.fmt_hdr.bits_per_sample != 16 || |
| 269 | wave_hdr.fmt_hdr.block_align != 2 * wave_hdr.fmt_hdr.nchan) |
| 270 | status = PJMEDIA_EWAVEUNSUPP; |
| 271 | break; |
| 272 | |
| 273 | case PJMEDIA_WAVE_FMT_TAG_ALAW: |
| 274 | case PJMEDIA_WAVE_FMT_TAG_ULAW: |
| 275 | if (wave_hdr.fmt_hdr.bits_per_sample != 8 || |
| 276 | wave_hdr.fmt_hdr.block_align != wave_hdr.fmt_hdr.nchan) |
| 277 | status = PJMEDIA_ENOTVALIDWAVE; |
| 278 | break; |
| 279 | |
| 280 | default: |
| 281 | status = PJMEDIA_EWAVEUNSUPP; |
| 282 | break; |
| 283 | } |
| 284 | |
| 285 | if (status != PJ_SUCCESS) { |
| 286 | pj_file_close(fport->fd); |
| 287 | return status; |
| 288 | } |
| 289 | |
| 290 | fport->fmt_tag = (pjmedia_wave_fmt_tag)wave_hdr.fmt_hdr.fmt_tag; |
| 291 | fport->bytes_per_sample = (pj_uint16_t) |
| 292 | (wave_hdr.fmt_hdr.bits_per_sample / 8); |
| 293 | |
| 294 | /* If length of fmt_header is greater than 16, skip the remaining |
| 295 | * fmt header data. |
| 296 | */ |
| 297 | if (wave_hdr.fmt_hdr.len > 16) { |
| 298 | size_to_read = wave_hdr.fmt_hdr.len - 16; |
| 299 | status = pj_file_setpos(fport->fd, size_to_read, PJ_SEEK_CUR); |
| 300 | if (status != PJ_SUCCESS) { |
| 301 | pj_file_close(fport->fd); |
| 302 | return status; |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | /* Repeat reading the WAVE file until we have 'data' chunk */ |
| 307 | for (;;) { |
| 308 | pjmedia_wave_subchunk subchunk; |
| 309 | size_read = 8; |
| 310 | status = pj_file_read(fport->fd, &subchunk, &size_read); |
| 311 | if (status != PJ_SUCCESS || size_read != 8) { |
| 312 | pj_file_close(fport->fd); |
| 313 | return PJMEDIA_EWAVETOOSHORT; |
| 314 | } |
| 315 | |
| 316 | /* Normalize endianness */ |
| 317 | PJMEDIA_WAVE_NORMALIZE_SUBCHUNK(&subchunk); |
| 318 | |
| 319 | /* Break if this is "data" chunk */ |
| 320 | if (subchunk.id == PJMEDIA_DATA_TAG) { |
| 321 | wave_hdr.data_hdr.data = PJMEDIA_DATA_TAG; |
| 322 | wave_hdr.data_hdr.len = subchunk.len; |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | /* Otherwise skip the chunk contents */ |
| 327 | size_to_read = subchunk.len; |
| 328 | status = pj_file_setpos(fport->fd, size_to_read, PJ_SEEK_CUR); |
| 329 | if (status != PJ_SUCCESS) { |
| 330 | pj_file_close(fport->fd); |
| 331 | return status; |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | /* Current file position now points to start of data */ |
| 336 | status = pj_file_getpos(fport->fd, &pos); |
| 337 | fport->start_data = (unsigned)pos; |
| 338 | fport->data_len = wave_hdr.data_hdr.len; |
| 339 | fport->data_left = wave_hdr.data_hdr.len; |
| 340 | |
| 341 | /* Validate length. */ |
| 342 | if (wave_hdr.data_hdr.len > fport->fsize - fport->start_data) { |
| 343 | pj_file_close(fport->fd); |
| 344 | return PJMEDIA_EWAVEUNSUPP; |
| 345 | } |
| 346 | if (wave_hdr.data_hdr.len < ptime * wave_hdr.fmt_hdr.sample_rate * |
| 347 | wave_hdr.fmt_hdr.nchan / 1000) |
| 348 | { |
| 349 | pj_file_close(fport->fd); |
| 350 | return PJMEDIA_EWAVETOOSHORT; |
| 351 | } |
| 352 | |
| 353 | /* It seems like we have a valid WAVE file. */ |
| 354 | |
| 355 | /* Initialize */ |
| 356 | fport->options = options; |
| 357 | |
| 358 | /* Update port info. */ |
| 359 | ad = pjmedia_format_get_audio_format_detail(&fport->base.info.fmt, 1); |
| 360 | pj_strdup2(pool, &name, filename); |
| 361 | samples_per_frame = ptime * wave_hdr.fmt_hdr.sample_rate * |
| 362 | wave_hdr.fmt_hdr.nchan / 1000; |
| 363 | pjmedia_port_info_init(&fport->base.info, &name, SIGNATURE, |
| 364 | wave_hdr.fmt_hdr.sample_rate, |
| 365 | wave_hdr.fmt_hdr.nchan, |
| 366 | BITS_PER_SAMPLE, |
| 367 | samples_per_frame); |
| 368 | |
| 369 | /* If file is shorter than buffer size, adjust buffer size to file |
| 370 | * size. Otherwise EOF callback will be called multiple times when |
| 371 | * fill_buffer() is called. |
| 372 | */ |
| 373 | if (wave_hdr.data_hdr.len < (unsigned)buff_size) |
| 374 | buff_size = wave_hdr.data_hdr.len; |
| 375 | |
| 376 | /* Create file buffer. |
| 377 | */ |
| 378 | fport->bufsize = (pj_uint32_t)buff_size; |
| 379 | |
| 380 | |
| 381 | /* samples_per_frame must be smaller than bufsize (because get_frame() |
| 382 | * doesn't handle this case). |
| 383 | */ |
| 384 | if (samples_per_frame * fport->bytes_per_sample >= fport->bufsize) { |
| 385 | pj_file_close(fport->fd); |
| 386 | return PJ_EINVAL; |
| 387 | } |
| 388 | |
| 389 | /* Create buffer. */ |
| 390 | fport->buf = (char*) pj_pool_alloc(pool, fport->bufsize); |
| 391 | if (!fport->buf) { |
| 392 | pj_file_close(fport->fd); |
| 393 | return PJ_ENOMEM; |
| 394 | } |
| 395 | |
| 396 | fport->readpos = fport->buf; |
| 397 | |
| 398 | /* Set initial position of the file. */ |
| 399 | fport->fpos = fport->start_data; |
| 400 | |
| 401 | /* Fill up the buffer. */ |
| 402 | status = fill_buffer(fport); |
| 403 | if (status != PJ_SUCCESS) { |
| 404 | pj_file_close(fport->fd); |
| 405 | return status; |
| 406 | } |
| 407 | |
| 408 | /* Done. */ |
| 409 | |
| 410 | *p_port = &fport->base; |
| 411 | |
| 412 | |
| 413 | PJ_LOG(4,(THIS_FILE, |
| 414 | "File player '%.*s' created: samp.rate=%d, ch=%d, bufsize=%uKB, " |
| 415 | "filesize=%luKB", |
| 416 | (int)fport->base.info.name.slen, |
| 417 | fport->base.info.name.ptr, |
| 418 | ad->clock_rate, |
| 419 | ad->channel_count, |
| 420 | fport->bufsize / 1000, |
| 421 | (unsigned long)(fport->fsize / 1000))); |
| 422 | |
| 423 | return PJ_SUCCESS; |
| 424 | } |
| 425 | |
| 426 | |
| 427 | /* |
| 428 | * Get the data length, in bytes. |
| 429 | */ |
| 430 | PJ_DEF(pj_ssize_t) pjmedia_wav_player_get_len(pjmedia_port *port) |
| 431 | { |
| 432 | struct file_reader_port *fport; |
| 433 | pj_ssize_t size; |
| 434 | |
| 435 | /* Sanity check */ |
| 436 | PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| 437 | |
| 438 | /* Check that this is really a player port */ |
| 439 | PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| 440 | |
| 441 | fport = (struct file_reader_port*) port; |
| 442 | |
| 443 | size = (pj_ssize_t) fport->fsize; |
| 444 | return size - fport->start_data; |
| 445 | } |
| 446 | |
| 447 | |
| 448 | /* |
| 449 | * Set position. |
| 450 | */ |
| 451 | PJ_DEF(pj_status_t) pjmedia_wav_player_port_set_pos(pjmedia_port *port, |
| 452 | pj_uint32_t bytes ) |
| 453 | { |
| 454 | struct file_reader_port *fport; |
| 455 | pj_status_t status; |
| 456 | |
| 457 | /* Sanity check */ |
| 458 | PJ_ASSERT_RETURN(port, PJ_EINVAL); |
| 459 | |
| 460 | /* Check that this is really a player port */ |
| 461 | PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, PJ_EINVALIDOP); |
| 462 | |
| 463 | |
| 464 | fport = (struct file_reader_port*) port; |
| 465 | |
| 466 | /* Check that this offset does not pass the audio-data (in case of |
| 467 | * extra chunk after audio data chunk |
| 468 | */ |
| 469 | PJ_ASSERT_RETURN(bytes < fport->data_len, PJ_EINVAL); |
| 470 | |
| 471 | fport->fpos = fport->start_data + bytes; |
| 472 | fport->data_left = fport->data_len - bytes; |
| 473 | pj_file_setpos( fport->fd, fport->fpos, PJ_SEEK_SET); |
| 474 | |
| 475 | fport->eof = PJ_FALSE; |
| 476 | status = fill_buffer(fport); |
| 477 | if (status != PJ_SUCCESS) |
| 478 | return status; |
| 479 | |
| 480 | fport->readpos = fport->buf; |
| 481 | |
| 482 | return PJ_SUCCESS; |
| 483 | } |
| 484 | |
| 485 | |
| 486 | /* |
| 487 | * Get the file play position of WAV player. |
| 488 | */ |
| 489 | PJ_DEF(pj_ssize_t) pjmedia_wav_player_port_get_pos( pjmedia_port *port ) |
| 490 | { |
| 491 | struct file_reader_port *fport; |
| 492 | pj_size_t payload_pos; |
| 493 | |
| 494 | /* Sanity check */ |
| 495 | PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| 496 | |
| 497 | /* Check that this is really a player port */ |
| 498 | PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| 499 | |
| 500 | fport = (struct file_reader_port*) port; |
| 501 | |
| 502 | payload_pos = (pj_size_t)(fport->fpos - fport->start_data); |
| 503 | if (payload_pos >= fport->bufsize) |
| 504 | return payload_pos - fport->bufsize + (fport->readpos - fport->buf); |
| 505 | else |
| 506 | return (fport->readpos - fport->buf) % payload_pos; |
| 507 | } |
| 508 | |
| 509 | |
| 510 | |
| 511 | /* |
| 512 | * Register a callback to be called when the file reading has reached the |
| 513 | * end of file. |
| 514 | */ |
| 515 | PJ_DEF(pj_status_t) pjmedia_wav_player_set_eof_cb( pjmedia_port *port, |
| 516 | void *user_data, |
| 517 | pj_status_t (*cb)(pjmedia_port *port, |
| 518 | void *usr_data)) |
| 519 | { |
| 520 | struct file_reader_port *fport; |
| 521 | |
| 522 | /* Sanity check */ |
| 523 | PJ_ASSERT_RETURN(port, -PJ_EINVAL); |
| 524 | |
| 525 | /* Check that this is really a player port */ |
| 526 | PJ_ASSERT_RETURN(port->info.signature == SIGNATURE, -PJ_EINVALIDOP); |
| 527 | |
| 528 | fport = (struct file_reader_port*) port; |
| 529 | |
| 530 | fport->base.port_data.pdata = user_data; |
| 531 | fport->cb = cb; |
| 532 | |
| 533 | return PJ_SUCCESS; |
| 534 | } |
| 535 | |
| 536 | |
| 537 | /* |
| 538 | * Get frame from file. |
| 539 | */ |
| 540 | static pj_status_t file_get_frame(pjmedia_port *this_port, |
| 541 | pjmedia_frame *frame) |
| 542 | { |
| 543 | struct file_reader_port *fport = (struct file_reader_port*)this_port; |
| 544 | pj_size_t frame_size; |
| 545 | pj_status_t status; |
| 546 | |
| 547 | pj_assert(fport->base.info.signature == SIGNATURE); |
| 548 | pj_assert(frame->size <= fport->bufsize); |
| 549 | |
| 550 | /* EOF is set and readpos already passed the eofpos */ |
| 551 | if (fport->eof && fport->readpos >= fport->eofpos) { |
| 552 | pj_status_t status = PJ_SUCCESS; |
| 553 | |
| 554 | PJ_LOG(5,(THIS_FILE, "File port %.*s EOF", |
| 555 | (int)fport->base.info.name.slen, |
| 556 | fport->base.info.name.ptr)); |
| 557 | |
| 558 | /* Call callback, if any */ |
| 559 | if (fport->cb) |
| 560 | status = (*fport->cb)(this_port, fport->base.port_data.pdata); |
| 561 | |
| 562 | /* If callback returns non PJ_SUCCESS or 'no loop' is specified, |
| 563 | * return immediately (and don't try to access player port since |
| 564 | * it might have been destroyed by the callback). |
| 565 | */ |
| 566 | if ((status != PJ_SUCCESS) || (fport->options & PJMEDIA_FILE_NO_LOOP)) { |
| 567 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 568 | frame->size = 0; |
| 569 | return PJ_EEOF; |
| 570 | } |
| 571 | |
| 572 | PJ_LOG(5,(THIS_FILE, "File port %.*s rewinding..", |
| 573 | (int)fport->base.info.name.slen, |
| 574 | fport->base.info.name.ptr)); |
| 575 | |
| 576 | fport->eof = PJ_FALSE; |
| 577 | } |
| 578 | |
| 579 | //pj_assert(frame->size == fport->base.info.bytes_per_frame); |
| 580 | if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| 581 | frame_size = frame->size; |
| 582 | //frame->size = frame_size; |
| 583 | } else { |
| 584 | /* Must be ULAW or ALAW */ |
| 585 | pj_assert(fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW || |
| 586 | fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW); |
| 587 | |
| 588 | frame_size = frame->size >> 1; |
| 589 | frame->size = frame_size << 1; |
| 590 | } |
| 591 | |
| 592 | /* Copy frame from buffer. */ |
| 593 | frame->type = PJMEDIA_FRAME_TYPE_AUDIO; |
| 594 | frame->timestamp.u64 = 0; |
| 595 | |
| 596 | if ((fport->readpos + frame_size) <= (fport->buf + fport->bufsize)) |
| 597 | { |
| 598 | /* Read contiguous buffer. */ |
| 599 | pj_memcpy(frame->buf, fport->readpos, frame_size); |
| 600 | |
| 601 | /* Fill up the buffer if all has been read. */ |
| 602 | fport->readpos += frame_size; |
| 603 | if (fport->readpos == fport->buf + fport->bufsize) { |
| 604 | fport->readpos = fport->buf; |
| 605 | |
| 606 | status = fill_buffer(fport); |
| 607 | if (status != PJ_SUCCESS) { |
| 608 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 609 | frame->size = 0; |
| 610 | fport->readpos = fport->buf + fport->bufsize; |
| 611 | return status; |
| 612 | } |
| 613 | } |
| 614 | } else { |
| 615 | unsigned endread; |
| 616 | |
| 617 | /* Split read. |
| 618 | * First stage: read until end of buffer. |
| 619 | */ |
| 620 | endread = (unsigned)((fport->buf+fport->bufsize) - fport->readpos); |
| 621 | pj_memcpy(frame->buf, fport->readpos, endread); |
| 622 | |
| 623 | /* End Of Buffer and EOF and NO LOOP */ |
| 624 | if (fport->eof && (fport->options & PJMEDIA_FILE_NO_LOOP)) { |
| 625 | fport->readpos += endread; |
| 626 | |
| 627 | if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_PCM) { |
| 628 | pj_bzero((char*)frame->buf + endread, frame_size - endread); |
| 629 | } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| 630 | int val = pjmedia_linear2ulaw(0); |
| 631 | pj_memset((char*)frame->buf + endread, val, |
| 632 | frame_size - endread); |
| 633 | } else if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) { |
| 634 | int val = pjmedia_linear2alaw(0); |
| 635 | pj_memset((char*)frame->buf + endread, val, |
| 636 | frame_size - endread); |
| 637 | } |
| 638 | |
| 639 | return PJ_SUCCESS; |
| 640 | } |
| 641 | |
| 642 | /* Second stage: fill up buffer, and read from the start of buffer. */ |
| 643 | status = fill_buffer(fport); |
| 644 | if (status != PJ_SUCCESS) { |
| 645 | frame->type = PJMEDIA_FRAME_TYPE_NONE; |
| 646 | frame->size = 0; |
| 647 | fport->readpos = fport->buf + fport->bufsize; |
| 648 | return status; |
| 649 | } |
| 650 | |
| 651 | pj_memcpy(((char*)frame->buf)+endread, fport->buf, frame_size-endread); |
| 652 | fport->readpos = fport->buf + (frame_size - endread); |
| 653 | } |
| 654 | |
| 655 | if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW || |
| 656 | fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW) |
| 657 | { |
| 658 | unsigned i; |
| 659 | pj_uint16_t *dst; |
| 660 | pj_uint8_t *src; |
| 661 | |
| 662 | dst = (pj_uint16_t*)frame->buf + frame_size - 1; |
| 663 | src = (pj_uint8_t*)frame->buf + frame_size - 1; |
| 664 | |
| 665 | if (fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW) { |
| 666 | for (i = 0; i < frame_size; ++i) { |
| 667 | *dst-- = (pj_uint16_t) pjmedia_ulaw2linear(*src--); |
| 668 | } |
| 669 | } else { |
| 670 | for (i = 0; i < frame_size; ++i) { |
| 671 | *dst-- = (pj_uint16_t) pjmedia_alaw2linear(*src--); |
| 672 | } |
| 673 | } |
| 674 | } |
| 675 | |
| 676 | return PJ_SUCCESS; |
| 677 | } |
| 678 | |
| 679 | /* |
| 680 | * Destroy port. |
| 681 | */ |
| 682 | static pj_status_t file_on_destroy(pjmedia_port *this_port) |
| 683 | { |
| 684 | struct file_reader_port *fport = (struct file_reader_port*) this_port; |
| 685 | |
| 686 | pj_assert(this_port->info.signature == SIGNATURE); |
| 687 | |
| 688 | pj_file_close(fport->fd); |
| 689 | return PJ_SUCCESS; |
| 690 | } |
| 691 | |