#include "asterisk.h"
#include <unistd.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/sched.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
#include "asterisk/ulaw.h"
#include "asterisk/alaw.h"
Go to the source code of this file.
Defines | |
#define | AU_ENC_8BIT_ULAW 1 |
#define | AU_HDR_CHANNELS_OFF 5 |
#define | AU_HDR_DATA_SIZE_OFF 2 |
#define | AU_HDR_ENCODING_OFF 3 |
#define | AU_HDR_HDR_SIZE_OFF 1 |
#define | AU_HDR_MAGIC_OFF 0 |
#define | AU_HDR_SAMPLE_RATE_OFF 4 |
#define | AU_HEADER(var) uint32_t var[6] |
#define | AU_HEADER_SIZE 24 |
#define | AU_MAGIC 0x2e736e64 |
#define | BUF_SIZE 160 |
#define | htoll(b) (b) |
#define | htols(b) (b) |
#define | ltohl(b) (b) |
#define | ltohs(b) (b) |
Functions | |
AST_MODULE_INFO_STANDARD (ASTERISK_GPL_KEY,"Raw/Sun uLaw/ALaw 8KHz (PCM,PCMA,AU), G.722 16Khz") | |
static int | au_open (struct ast_filestream *s) |
static int | au_rewrite (struct ast_filestream *s, const char *comment) |
static int | au_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | au_tell (struct ast_filestream *fs) |
static int | au_trunc (struct ast_filestream *fs) |
static int | check_header (FILE *f) |
static int | load_module (void) |
static struct ast_frame * | pcm_read (struct ast_filestream *s, int *whennext) |
static int | pcm_seek (struct ast_filestream *fs, off_t sample_offset, int whence) |
static off_t | pcm_tell (struct ast_filestream *fs) |
static int | pcm_trunc (struct ast_filestream *fs) |
static int | pcm_write (struct ast_filestream *fs, struct ast_frame *f) |
static int | unload_module (void) |
static int | update_header (FILE *f) |
static int | write_header (FILE *f) |
Variables | |
static struct ast_format | alaw_f |
static char | alaw_silence [BUF_SIZE] |
static struct ast_format | au_f |
static struct ast_format | g722_f |
static struct ast_format | pcm_f |
static char | ulaw_silence [BUF_SIZE] |
Definition in file format_pcm.c.
#define AU_ENC_8BIT_ULAW 1 |
#define AU_HDR_CHANNELS_OFF 5 |
#define AU_HDR_DATA_SIZE_OFF 2 |
#define AU_HDR_ENCODING_OFF 3 |
#define AU_HDR_HDR_SIZE_OFF 1 |
#define AU_HDR_MAGIC_OFF 0 |
#define AU_HDR_SAMPLE_RATE_OFF 4 |
#define AU_HEADER | ( | var | ) | uint32_t var[6] |
#define AU_HEADER_SIZE 24 |
Definition at line 234 of file format_pcm.c.
Referenced by au_seek(), au_tell(), check_header(), update_header(), and write_header().
#define AU_MAGIC 0x2e736e64 |
#define BUF_SIZE 160 |
Definition at line 50 of file format_pcm.c.
#define htoll | ( | b | ) | (b) |
#define htols | ( | b | ) | (b) |
#define ltohl | ( | b | ) | (b) |
#define ltohs | ( | b | ) | (b) |
AST_MODULE_INFO_STANDARD | ( | ASTERISK_GPL_KEY | , | |
"Raw/Sun uLaw/ALaw 8KHz | PCM,PCMA,AU, | |||
G.722 16Khz" | ||||
) |
static int au_open | ( | struct ast_filestream * | s | ) | [static] |
Definition at line 368 of file format_pcm.c.
References check_header(), and ast_filestream::f.
00369 { 00370 if (check_header(s->f) < 0) 00371 return -1; 00372 return 0; 00373 }
static int au_rewrite | ( | struct ast_filestream * | s, | |
const char * | comment | |||
) | [static] |
Definition at line 375 of file format_pcm.c.
References ast_filestream::f, and write_header().
00376 { 00377 if (write_header(s->f)) 00378 return -1; 00379 return 0; 00380 }
static int au_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 383 of file format_pcm.c.
References AST_FORMAT_G722, AU_HEADER_SIZE, ast_filestream::f, ast_filestream::fmt, ast_format::format, offset, and SEEK_FORCECUR.
00384 { 00385 off_t min, max, cur; 00386 long offset = 0, bytes; 00387 00388 if (fs->fmt->format == AST_FORMAT_G722) 00389 bytes = sample_offset / 2; 00390 else 00391 bytes = sample_offset; 00392 00393 min = AU_HEADER_SIZE; 00394 cur = ftello(fs->f); 00395 fseek(fs->f, 0, SEEK_END); 00396 max = ftello(fs->f); 00397 00398 if (whence == SEEK_SET) 00399 offset = bytes + min; 00400 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) 00401 offset = bytes + cur; 00402 else if (whence == SEEK_END) 00403 offset = max - bytes; 00404 if (whence != SEEK_FORCECUR) { 00405 offset = (offset > max) ? max : offset; 00406 } 00407 00408 /* always protect the header space. */ 00409 offset = (offset < min) ? min : offset; 00410 00411 return fseeko(fs->f, offset, SEEK_SET); 00412 }
static off_t au_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 421 of file format_pcm.c.
References AU_HEADER_SIZE, ast_filestream::f, and offset.
00422 { 00423 off_t offset = ftello(fs->f); 00424 return offset - AU_HEADER_SIZE; 00425 }
static int au_trunc | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 414 of file format_pcm.c.
References ast_filestream::f, and update_header().
00415 { 00416 if (ftruncate(fileno(fs->f), ftell(fs->f))) 00417 return -1; 00418 return update_header(fs->f); 00419 }
static int check_header | ( | FILE * | f | ) | [static] |
Definition at line 269 of file format_pcm.c.
References ast_log(), AU_ENC_8BIT_ULAW, AU_HDR_CHANNELS_OFF, AU_HDR_ENCODING_OFF, AU_HDR_MAGIC_OFF, AU_HDR_SAMPLE_RATE_OFF, AU_HEADER, AU_HEADER_SIZE, AU_MAGIC, channels, DEFAULT_SAMPLE_RATE, LOG_WARNING, and ltohl.
Referenced by au_open(), and wav_open().
00270 { 00271 AU_HEADER(header); 00272 uint32_t magic; 00273 uint32_t hdr_size; 00274 uint32_t data_size; 00275 uint32_t encoding; 00276 uint32_t sample_rate; 00277 uint32_t channels; 00278 00279 if (fread(header, 1, AU_HEADER_SIZE, f) != AU_HEADER_SIZE) { 00280 ast_log(LOG_WARNING, "Read failed (header)\n"); 00281 return -1; 00282 } 00283 magic = ltohl(header[AU_HDR_MAGIC_OFF]); 00284 if (magic != (uint32_t) AU_MAGIC) { 00285 ast_log(LOG_WARNING, "Bad magic: 0x%x\n", magic); 00286 } 00287 /* hdr_size = ltohl(header[AU_HDR_HDR_SIZE_OFF]); 00288 if (hdr_size < AU_HEADER_SIZE)*/ 00289 hdr_size = AU_HEADER_SIZE; 00290 /* data_size = ltohl(header[AU_HDR_DATA_SIZE_OFF]); */ 00291 encoding = ltohl(header[AU_HDR_ENCODING_OFF]); 00292 if (encoding != AU_ENC_8BIT_ULAW) { 00293 ast_log(LOG_WARNING, "Unexpected format: %d. Only 8bit ULAW allowed (%d)\n", encoding, AU_ENC_8BIT_ULAW); 00294 return -1; 00295 } 00296 sample_rate = ltohl(header[AU_HDR_SAMPLE_RATE_OFF]); 00297 if (sample_rate != DEFAULT_SAMPLE_RATE) { 00298 ast_log(LOG_WARNING, "Sample rate can only be 8000 not %d\n", sample_rate); 00299 return -1; 00300 } 00301 channels = ltohl(header[AU_HDR_CHANNELS_OFF]); 00302 if (channels != 1) { 00303 ast_log(LOG_WARNING, "Not in mono: channels=%d\n", channels); 00304 return -1; 00305 } 00306 /* Skip to data */ 00307 fseek(f, 0, SEEK_END); 00308 data_size = ftell(f) - hdr_size; 00309 if (fseek(f, hdr_size, SEEK_SET) == -1 ) { 00310 ast_log(LOG_WARNING, "Failed to skip to data: %d\n", hdr_size); 00311 return -1; 00312 } 00313 return data_size; 00314 }
static int load_module | ( | void | ) | [static] |
Definition at line 482 of file format_pcm.c.
References ast_format_register, AST_LIN2A, and AST_LIN2MU.
00483 { 00484 int index; 00485 00486 /* XXX better init ? */ 00487 for (index = 0; index < (sizeof(ulaw_silence) / sizeof(ulaw_silence[0])); index++) 00488 ulaw_silence[index] = AST_LIN2MU(0); 00489 for (index = 0; index < (sizeof(alaw_silence) / sizeof(alaw_silence[0])); index++) 00490 alaw_silence[index] = AST_LIN2A(0); 00491 00492 return ast_format_register(&pcm_f) 00493 || ast_format_register(&alaw_f) 00494 || ast_format_register(&au_f) 00495 || ast_format_register(&g722_f); 00496 }
static struct ast_frame* pcm_read | ( | struct ast_filestream * | s, | |
int * | whennext | |||
) | [static, read] |
Definition at line 89 of file format_pcm.c.
References AST_FORMAT_G722, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fmt, ast_format::format, ast_filestream::fr, ast_frame::frametype, LOG_WARNING, ast_frame::mallocd, ast_frame::samples, and ast_frame::subclass.
00090 { 00091 int res; 00092 00093 /* Send a frame from the file to the appropriate channel */ 00094 00095 s->fr.frametype = AST_FRAME_VOICE; 00096 s->fr.subclass = s->fmt->format; 00097 s->fr.mallocd = 0; 00098 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00099 if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) < 1) { 00100 if (res) 00101 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); 00102 return NULL; 00103 } 00104 s->fr.datalen = res; 00105 if (s->fmt->format == AST_FORMAT_G722) 00106 *whennext = s->fr.samples = res * 2; 00107 else 00108 *whennext = s->fr.samples = res; 00109 return &s->fr; 00110 }
static int pcm_seek | ( | struct ast_filestream * | fs, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Definition at line 112 of file format_pcm.c.
References AST_FORMAT_ALAW, ast_log(), BUF_SIZE, ast_filestream::f, ast_filestream::fmt, ast_format::format, LOG_WARNING, offset, SEEK_FORCECUR, and ast_frame::src.
00113 { 00114 off_t cur, max, offset = 0; 00115 int ret = -1; /* assume error */ 00116 00117 cur = ftello(fs->f); 00118 fseeko(fs->f, 0, SEEK_END); 00119 max = ftello(fs->f); 00120 00121 switch (whence) { 00122 case SEEK_SET: 00123 offset = sample_offset; 00124 break; 00125 case SEEK_END: 00126 offset = max - sample_offset; 00127 break; 00128 case SEEK_CUR: 00129 case SEEK_FORCECUR: 00130 offset = cur + sample_offset; 00131 break; 00132 default: 00133 ast_log(LOG_WARNING, "invalid whence %d, assuming SEEK_SET\n", whence); 00134 offset = sample_offset; 00135 } 00136 if (offset < 0) { 00137 ast_log(LOG_WARNING, "negative offset %ld, resetting to 0\n", (long) offset); 00138 offset = 0; 00139 } 00140 if (whence == SEEK_FORCECUR && offset > max) { /* extend the file */ 00141 size_t left = offset - max; 00142 const char *src = (fs->fmt->format == AST_FORMAT_ALAW) ? alaw_silence : ulaw_silence; 00143 00144 while (left) { 00145 size_t written = fwrite(src, 1, (left > BUF_SIZE) ? BUF_SIZE : left, fs->f); 00146 if (written == -1) 00147 break; /* error */ 00148 left -= written; 00149 } 00150 ret = 0; /* successful */ 00151 } else { 00152 if (offset > max) { 00153 ast_log(LOG_WARNING, "offset too large %ld, truncating to %ld\n", (long) offset, (long) max); 00154 offset = max; 00155 } 00156 ret = fseeko(fs->f, offset, SEEK_SET); 00157 } 00158 return ret; 00159 }
static off_t pcm_tell | ( | struct ast_filestream * | fs | ) | [static] |
Definition at line 166 of file format_pcm.c.
References ast_filestream::f.
00167 { 00168 return ftello(fs->f); 00169 }
static int pcm_trunc | ( | struct ast_filestream * | fs | ) | [static] |
static int pcm_write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Definition at line 171 of file format_pcm.c.
References ast_filestream::_private, AST_FORMAT_ALAW, AST_FRAME_VOICE, ast_log(), ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fmt, ast_format::format, ast_frame::frametype, LOG_WARNING, and ast_frame::subclass.
00172 { 00173 int res; 00174 00175 if (f->frametype != AST_FRAME_VOICE) { 00176 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00177 return -1; 00178 } 00179 if (f->subclass != fs->fmt->format) { 00180 ast_log(LOG_WARNING, "Asked to write incompatible format frame (%d)!\n", f->subclass); 00181 return -1; 00182 } 00183 00184 #ifdef REALTIME_WRITE 00185 if (s->fmt->format == AST_FORMAT_ALAW) { 00186 struct pcm_desc *pd = (struct pcm_desc *)fs->_private; 00187 struct stat stat_buf; 00188 unsigned long cur_time = get_time(); 00189 unsigned long fpos = ( cur_time - pd->start_time ) * 8; /* 8 bytes per msec */ 00190 /* Check if we have written to this position yet. If we have, then increment pos by one frame 00191 * for some degree of protection against receiving packets in the same clock tick. 00192 */ 00193 00194 fstat(fileno(fs->f), &stat_buf ); 00195 if (stat_buf.st_size > fpos ) 00196 fpos += f->datalen; /* Incrementing with the size of this current frame */ 00197 00198 if (stat_buf.st_size < fpos) { 00199 /* fill the gap with 0x55 rather than 0. */ 00200 char buf[1024]; 00201 unsigned long cur, to_write; 00202 00203 cur = stat_buf.st_size; 00204 if (fseek(fs->f, cur, SEEK_SET) < 0) { 00205 ast_log( LOG_WARNING, "Cannot seek in file: %s\n", strerror(errno) ); 00206 return -1; 00207 } 00208 memset(buf, 0x55, 512); 00209 while (cur < fpos) { 00210 to_write = fpos - cur; 00211 if (to_write > sizeof(buf)) 00212 to_write = sizeof(buf); 00213 fwrite(buf, 1, to_write, fs->f); 00214 cur += to_write; 00215 } 00216 } 00217 00218 if (fseek(s->f, fpos, SEEK_SET) < 0) { 00219 ast_log( LOG_WARNING, "Cannot seek in file: %s\n", strerror(errno) ); 00220 return -1; 00221 } 00222 } 00223 #endif /* REALTIME_WRITE */ 00224 00225 if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) { 00226 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno)); 00227 return -1; 00228 } 00229 return 0; 00230 }
static int unload_module | ( | void | ) | [static] |
Definition at line 498 of file format_pcm.c.
References ast_format_unregister(), and ast_format::name.
00499 { 00500 return ast_format_unregister(pcm_f.name) 00501 || ast_format_unregister(alaw_f.name) 00502 || ast_format_unregister(au_f.name) 00503 || ast_format_unregister(g722_f.name); 00504 }
static int update_header | ( | FILE * | f | ) | [static] |
Definition at line 316 of file format_pcm.c.
References ast_log(), AU_HDR_DATA_SIZE_OFF, AU_HEADER_SIZE, htoll, and LOG_WARNING.
Referenced by au_trunc(), wav_trunc(), and wav_write().
00317 { 00318 off_t cur, end; 00319 uint32_t datalen; 00320 int bytes; 00321 00322 cur = ftell(f); 00323 fseek(f, 0, SEEK_END); 00324 end = ftell(f); 00325 /* data starts 24 bytes in */ 00326 bytes = end - AU_HEADER_SIZE; 00327 datalen = htoll(bytes); 00328 00329 if (cur < 0) { 00330 ast_log(LOG_WARNING, "Unable to find our position\n"); 00331 return -1; 00332 } 00333 if (fseek(f, AU_HDR_DATA_SIZE_OFF * sizeof(uint32_t), SEEK_SET)) { 00334 ast_log(LOG_WARNING, "Unable to set our position\n"); 00335 return -1; 00336 } 00337 if (fwrite(&datalen, 1, sizeof(datalen), f) != sizeof(datalen)) { 00338 ast_log(LOG_WARNING, "Unable to set write file size\n"); 00339 return -1; 00340 } 00341 if (fseek(f, cur, SEEK_SET)) { 00342 ast_log(LOG_WARNING, "Unable to return to position\n"); 00343 return -1; 00344 } 00345 return 0; 00346 }
static int write_header | ( | FILE * | f | ) | [static] |
Definition at line 348 of file format_pcm.c.
References ast_log(), AU_ENC_8BIT_ULAW, AU_HDR_CHANNELS_OFF, AU_HDR_DATA_SIZE_OFF, AU_HDR_ENCODING_OFF, AU_HDR_HDR_SIZE_OFF, AU_HDR_MAGIC_OFF, AU_HDR_SAMPLE_RATE_OFF, AU_HEADER, AU_HEADER_SIZE, AU_MAGIC, DEFAULT_SAMPLE_RATE, htoll, and LOG_WARNING.
Referenced by au_rewrite(), and wav_rewrite().
00349 { 00350 AU_HEADER(header); 00351 00352 header[AU_HDR_MAGIC_OFF] = htoll((uint32_t) AU_MAGIC); 00353 header[AU_HDR_HDR_SIZE_OFF] = htoll(AU_HEADER_SIZE); 00354 header[AU_HDR_DATA_SIZE_OFF] = 0; 00355 header[AU_HDR_ENCODING_OFF] = htoll(AU_ENC_8BIT_ULAW); 00356 header[AU_HDR_SAMPLE_RATE_OFF] = htoll(DEFAULT_SAMPLE_RATE); 00357 header[AU_HDR_CHANNELS_OFF] = htoll(1); 00358 00359 /* Write an au header, ignoring sizes which will be filled in later */ 00360 fseek(f, 0, SEEK_SET); 00361 if (fwrite(header, 1, AU_HEADER_SIZE, f) != AU_HEADER_SIZE) { 00362 ast_log(LOG_WARNING, "Unable to write header\n"); 00363 return -1; 00364 } 00365 return 0; 00366 }
struct ast_format alaw_f [static] |
Definition at line 427 of file format_pcm.c.
char alaw_silence[BUF_SIZE] [static] |
Definition at line 53 of file format_pcm.c.
struct ast_format au_f [static] |
Definition at line 468 of file format_pcm.c.
struct ast_format g722_f [static] |
Definition at line 456 of file format_pcm.c.
struct ast_format pcm_f [static] |
Definition at line 444 of file format_pcm.c.
char ulaw_silence[BUF_SIZE] [static] |
Definition at line 52 of file format_pcm.c.