Asterisk - The Open Source Telephony Project GIT-master-0bf3178
Data Structures | Macros | Functions | Variables
format_pcm.c File Reference

Flat, binary, ulaw PCM file format. More...

#include "asterisk.h"
#include "asterisk/mod_format.h"
#include "asterisk/module.h"
#include "asterisk/endian.h"
#include "asterisk/ulaw.h"
#include "asterisk/alaw.h"
#include "asterisk/format_cache.h"
Include dependency graph for format_pcm.c:

Go to the source code of this file.

Data Structures

struct  au_desc
 

Macros

#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_MAGIC   0x2e736e64
 
#define BUF_SIZE   160 /* 160 bytes, and same number of samples */
 
#define MIN_AU_HEADER_SIZE   24
 

Functions

static void __reg_module (void)
 
static void __unreg_module (void)
 
struct ast_moduleAST_MODULE_SELF_SYM (void)
 
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 (struct ast_filestream *fs)
 
static struct ast_frameg722_read (struct ast_filestream *s, int *whennext)
 
static int g722_seek (struct ast_filestream *fs, off_t sample_offset, int whence)
 
static off_t g722_tell (struct ast_filestream *fs)
 
static int load_module (void)
 
static struct ast_framepcm_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 (struct ast_filestream *fs)
 
static int write_header (struct ast_filestream *fs)
 

Variables

static struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw/Sun uLaw/ALaw 8KHz (PCM,PCMA,AU), G.722 16Khz" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
 
static struct ast_format_def alaw_f
 
static char alaw_silence [BUF_SIZE]
 
static const struct ast_module_infoast_module_info = &__mod_info
 
static struct ast_format_def au_f
 
static struct ast_format_def g722_f
 
static struct ast_format_def pcm_f
 
static char ulaw_silence [BUF_SIZE]
 

Detailed Description

Flat, binary, ulaw PCM file format.

Definition in file format_pcm.c.

Macro Definition Documentation

◆ AU_ENC_8BIT_ULAW

#define AU_ENC_8BIT_ULAW   1

Definition at line 247 of file format_pcm.c.

◆ AU_HDR_CHANNELS_OFF

#define AU_HDR_CHANNELS_OFF   5

Definition at line 245 of file format_pcm.c.

◆ AU_HDR_DATA_SIZE_OFF

#define AU_HDR_DATA_SIZE_OFF   2

Definition at line 242 of file format_pcm.c.

◆ AU_HDR_ENCODING_OFF

#define AU_HDR_ENCODING_OFF   3

Definition at line 243 of file format_pcm.c.

◆ AU_HDR_HDR_SIZE_OFF

#define AU_HDR_HDR_SIZE_OFF   1

Definition at line 241 of file format_pcm.c.

◆ AU_HDR_MAGIC_OFF

#define AU_HDR_MAGIC_OFF   0

Definition at line 240 of file format_pcm.c.

◆ AU_HDR_SAMPLE_RATE_OFF

#define AU_HDR_SAMPLE_RATE_OFF   4

Definition at line 244 of file format_pcm.c.

◆ AU_HEADER

#define AU_HEADER (   var)    uint32_t var[6]

Definition at line 238 of file format_pcm.c.

◆ AU_MAGIC

#define AU_MAGIC   0x2e736e64

Definition at line 249 of file format_pcm.c.

◆ BUF_SIZE

#define BUF_SIZE   160 /* 160 bytes, and same number of samples */

Definition at line 40 of file format_pcm.c.

◆ MIN_AU_HEADER_SIZE

#define MIN_AU_HEADER_SIZE   24

Definition at line 237 of file format_pcm.c.

Function Documentation

◆ __reg_module()

static void __reg_module ( void  )
static

Definition at line 581 of file format_pcm.c.

◆ __unreg_module()

static void __unreg_module ( void  )
static

Definition at line 581 of file format_pcm.c.

◆ AST_MODULE_SELF_SYM()

struct ast_module * AST_MODULE_SELF_SYM ( void  )

Definition at line 581 of file format_pcm.c.

◆ au_open()

static int au_open ( struct ast_filestream s)
static

Definition at line 388 of file format_pcm.c.

389{
390 if (check_header(s) < 0)
391 return -1;
392 return 0;
393}
static int check_header(struct ast_filestream *fs)
Definition: format_pcm.c:276

References check_header().

◆ au_rewrite()

static int au_rewrite ( struct ast_filestream s,
const char *  comment 
)
static

Definition at line 395 of file format_pcm.c.

396{
397 struct au_desc *desc = s->_private;
398
399 desc->hdr_size = MIN_AU_HEADER_SIZE;
400
401 if (write_header(s))
402 return -1;
403 return 0;
404}
static const char desc[]
Definition: cdr_radius.c:84
static int write_header(struct ast_filestream *fs)
Definition: format_pcm.c:365
#define MIN_AU_HEADER_SIZE
Definition: format_pcm.c:237
void * _private
Definition: mod_format.h:124

References ast_filestream::_private, desc, MIN_AU_HEADER_SIZE, and write_header().

◆ au_seek()

static int au_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 407 of file format_pcm.c.

408{
409 off_t min, max, cur;
410 long offset = 0;
411 struct au_desc *desc = fs->_private;
412
413 min = desc->hdr_size;
414
415 if ((cur = ftello(fs->f)) < 0) {
416 ast_log(AST_LOG_WARNING, "Unable to determine current position in au filestream %p: %s\n", fs, strerror(errno));
417 return -1;
418 }
419
420 if (fseeko(fs->f, 0, SEEK_END) < 0) {
421 ast_log(AST_LOG_WARNING, "Unable to seek to end of au filestream %p: %s\n", fs, strerror(errno));
422 return -1;
423 }
424
425 if ((max = ftello(fs->f)) < 0) {
426 ast_log(AST_LOG_WARNING, "Unable to determine max position in au filestream %p: %s\n", fs, strerror(errno));
427 return -1;
428 }
429
430 if (whence == SEEK_SET)
431 offset = sample_offset + min;
432 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
433 offset = sample_offset + cur;
434 else if (whence == SEEK_END)
435 offset = max - sample_offset;
436
437 if (whence != SEEK_FORCECUR) {
438 offset = (offset > max) ? max : offset;
439 }
440
441 /* always protect the header space. */
442 offset = (offset < min) ? min : offset;
443
444 return fseeko(fs->f, offset, SEEK_SET);
445}
#define ast_log
Definition: astobj2.c:42
#define min(a, b)
Definition: f2c.h:197
#define max(a, b)
Definition: f2c.h:198
#define SEEK_FORCECUR
Definition: file.h:51
#define AST_LOG_WARNING
int errno

References ast_filestream::_private, ast_log, AST_LOG_WARNING, desc, errno, ast_filestream::f, max, min, and SEEK_FORCECUR.

◆ au_tell()

static off_t au_tell ( struct ast_filestream fs)
static

Definition at line 467 of file format_pcm.c.

468{
469 struct au_desc *desc = fs->_private;
470 off_t offset = ftello(fs->f);
471 return offset - desc->hdr_size;
472}

References ast_filestream::_private, desc, and ast_filestream::f.

◆ au_trunc()

static int au_trunc ( struct ast_filestream fs)
static

Definition at line 447 of file format_pcm.c.

448{
449 int fd;
450 off_t cur;
451
452 if ((fd = fileno(fs->f)) < 0) {
453 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for au filestream %p: %s\n", fs, strerror(errno));
454 return -1;
455 }
456 if ((cur = ftello(fs->f)) < 0) {
457 ast_log(AST_LOG_WARNING, "Unable to determine current position in au filestream %p: %s\n", fs, strerror(errno));
458 return -1;
459 }
460 /* Truncate file to current length */
461 if (ftruncate(fd, cur)) {
462 return -1;
463 }
464 return update_header(fs);
465}
static int update_header(struct ast_filestream *fs)
Definition: format_pcm.c:331

References ast_log, AST_LOG_WARNING, errno, ast_filestream::f, and update_header().

◆ check_header()

static int check_header ( struct ast_filestream fs)
static

Definition at line 276 of file format_pcm.c.

277{
279 uint32_t magic;
280 uint32_t hdr_size;
281 uint32_t data_size;
282 uint32_t encoding;
283 uint32_t sample_rate;
284 uint32_t channels;
285
286 struct au_desc *desc = fs->_private;
287 FILE *f = fs->f;
288
289 if (fread(header, 1, MIN_AU_HEADER_SIZE, f) != MIN_AU_HEADER_SIZE) {
290 ast_log(LOG_WARNING, "Read failed (header)\n");
291 return -1;
292 }
293 magic = ltohl(header[AU_HDR_MAGIC_OFF]);
294 if (magic != (uint32_t) AU_MAGIC) {
295 ast_log(LOG_WARNING, "Bad magic: 0x%x\n", magic);
296 }
300 }
301/* data_size = ltohl(header[AU_HDR_DATA_SIZE_OFF]); */
303 if (encoding != AU_ENC_8BIT_ULAW) {
304 ast_log(LOG_WARNING, "Unexpected format: %u. Only 8bit ULAW allowed (%d)\n", encoding, AU_ENC_8BIT_ULAW);
305 return -1;
306 }
307 sample_rate = ltohl(header[AU_HDR_SAMPLE_RATE_OFF]);
308 if (sample_rate != DEFAULT_SAMPLE_RATE) {
309 ast_log(LOG_WARNING, "Sample rate can only be 8000 not %u\n", sample_rate);
310 return -1;
311 }
313 if (channels != 1) {
314 ast_log(LOG_WARNING, "Not in mono: channels=%u\n", channels);
315 return -1;
316 }
317 /* Skip to data */
318 fseek(f, 0, SEEK_END);
319 data_size = ftell(f) - hdr_size;
320 if (fseek(f, hdr_size, SEEK_SET) == -1 ) {
321 ast_log(LOG_WARNING, "Failed to skip to data: %u\n", hdr_size);
322 return -1;
323 }
324
325 /* We'll need this later */
326 desc->hdr_size = hdr_size;
327
328 return data_size;
329}
#define DEFAULT_SAMPLE_RATE
Definition: asterisk.h:48
static char * encoding
Definition: cdr_pgsql.c:70
static struct channel_usage channels
#define AU_MAGIC
Definition: format_pcm.c:249
#define AU_HDR_SAMPLE_RATE_OFF
Definition: format_pcm.c:244
#define AU_ENC_8BIT_ULAW
Definition: format_pcm.c:247
#define AU_HEADER(var)
Definition: format_pcm.c:238
#define AU_HDR_MAGIC_OFF
Definition: format_pcm.c:240
#define AU_HDR_CHANNELS_OFF
Definition: format_pcm.c:245
#define AU_HDR_HDR_SIZE_OFF
Definition: format_pcm.c:241
#define AU_HDR_ENCODING_OFF
Definition: format_pcm.c:243
#define LOG_WARNING
uint32_t hdr_size
Definition: format_pcm.c:273

References ast_filestream::_private, ast_log, AU_ENC_8BIT_ULAW, AU_HDR_CHANNELS_OFF, AU_HDR_ENCODING_OFF, AU_HDR_HDR_SIZE_OFF, AU_HDR_MAGIC_OFF, AU_HDR_SAMPLE_RATE_OFF, AU_HEADER, AU_MAGIC, channels, DEFAULT_SAMPLE_RATE, desc, encoding, ast_filestream::f, au_desc::hdr_size, LOG_WARNING, and MIN_AU_HEADER_SIZE.

Referenced by au_open().

◆ g722_read()

static struct ast_frame * g722_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 474 of file format_pcm.c.

475{
476 struct ast_frame *f = pcm_read(s, whennext);
477 *whennext = s->fr.samples = (*whennext * 2);
478 return f;
479}
static struct ast_frame * pcm_read(struct ast_filestream *s, int *whennext)
Definition: format_pcm.c:79
struct ast_frame fr
frame produced by read, typically
Definition: mod_format.h:122
Data structure associated with a single frame of data.

References ast_filestream::fr, pcm_read(), and ast_frame::samples.

◆ g722_seek()

static int g722_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 481 of file format_pcm.c.

482{
483 return pcm_seek(fs, sample_offset / 2, whence);
484}
static int pcm_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
Definition: format_pcm.c:98

References pcm_seek().

◆ g722_tell()

static off_t g722_tell ( struct ast_filestream fs)
static

Definition at line 486 of file format_pcm.c.

487{
488 return pcm_tell(fs) * 2;
489}
static off_t pcm_tell(struct ast_filestream *fs)
Definition: format_pcm.c:175

References pcm_tell().

◆ load_module()

static int load_module ( void  )
static

Definition at line 552 of file format_pcm.c.

553{
554 int i;
555
556 /* XXX better init ? */
557 for (i = 0; i < ARRAY_LEN(ulaw_silence); i++)
558 ulaw_silence[i] = AST_LIN2MU(0);
559 for (i = 0; i < ARRAY_LEN(alaw_silence); i++)
560 alaw_silence[i] = AST_LIN2A(0);
561
572 }
574}
#define AST_LIN2A(a)
Definition: alaw.h:50
struct ast_format * ast_format_ulaw
Built-in cached ulaw format.
Definition: format_cache.c:86
struct ast_format * ast_format_alaw
Built-in cached alaw format.
Definition: format_cache.c:91
struct ast_format * ast_format_g722
Built-in cached g722 format.
Definition: format_cache.c:106
static char alaw_silence[BUF_SIZE]
Definition: format_pcm.c:43
static struct ast_format_def pcm_f
Definition: format_pcm.c:507
static struct ast_format_def alaw_f
Definition: format_pcm.c:491
static struct ast_format_def au_f
Definition: format_pcm.c:530
static struct ast_format_def g722_f
Definition: format_pcm.c:519
static int unload_module(void)
Definition: format_pcm.c:544
static char ulaw_silence[BUF_SIZE]
Definition: format_pcm.c:42
#define ast_format_def_register(f)
Definition: mod_format.h:136
@ AST_MODULE_LOAD_SUCCESS
Definition: module.h:70
@ AST_MODULE_LOAD_DECLINE
Module has failed to load, may be in an inconsistent state.
Definition: module.h:78
struct ast_format * format
Definition: mod_format.h:48
#define AST_LIN2MU(a)
Definition: ulaw.h:49
#define ARRAY_LEN(a)
Definition: utils.h:666

References alaw_f, alaw_silence, ARRAY_LEN, ast_format_alaw, ast_format_def_register, ast_format_g722, ast_format_ulaw, AST_LIN2A, AST_LIN2MU, AST_MODULE_LOAD_DECLINE, AST_MODULE_LOAD_SUCCESS, au_f, ast_format_def::format, g722_f, pcm_f, ulaw_silence, and unload_module().

◆ pcm_read()

static struct ast_frame * pcm_read ( struct ast_filestream s,
int *  whennext 
)
static

Definition at line 79 of file format_pcm.c.

80{
81 size_t res;
82
83 /* Send a frame from the file to the appropriate channel */
85 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) < 1) {
86 if (res) {
87 ast_log(LOG_WARNING, "Short read of %s data (expected %d bytes, read %zu): %s\n",
89 strerror(errno));
90 }
91 return NULL;
92 }
93 s->fr.datalen = res;
94 *whennext = s->fr.samples = res;
95 return &s->fr;
96}
const char * ast_format_get_name(const struct ast_format *format)
Get the name associated with a format.
Definition: format.c:334
#define BUF_SIZE
Definition: format_pcm.c:40
#define AST_FRAME_SET_BUFFER(fr, _base, _ofs, _datalen)
#define AST_FRIENDLY_OFFSET
Offset into a frame's data buffer.
#define NULL
Definition: resample.c:96
struct ast_format * format
struct ast_frame_subclass subclass
union ast_frame::@226 data

References ast_format_get_name(), AST_FRAME_SET_BUFFER, AST_FRIENDLY_OFFSET, ast_log, ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_frame_subclass::format, ast_filestream::fr, LOG_WARNING, NULL, ast_frame::ptr, ast_frame::samples, and ast_frame::subclass.

Referenced by g722_read().

◆ pcm_seek()

static int pcm_seek ( struct ast_filestream fs,
off_t  sample_offset,
int  whence 
)
static

Definition at line 98 of file format_pcm.c.

99{
100 off_t cur, max, offset = 0;
101 int ret = -1; /* assume error */
102
103 if ((cur = ftello(fs->f)) < 0) {
104 ast_log(AST_LOG_WARNING, "Unable to determine current position in pcm filestream %p: %s\n", fs, strerror(errno));
105 return -1;
106 }
107
108 if (fseeko(fs->f, 0, SEEK_END) < 0) {
109 ast_log(AST_LOG_WARNING, "Unable to seek to end of pcm filestream %p: %s\n", fs, strerror(errno));
110 return -1;
111 }
112
113 if ((max = ftello(fs->f)) < 0) {
114 ast_log(AST_LOG_WARNING, "Unable to determine max position in pcm filestream %p: %s\n", fs, strerror(errno));
115 return -1;
116 }
117
118 switch (whence) {
119 case SEEK_SET:
120 offset = sample_offset;
121 break;
122 case SEEK_END:
123 offset = max - sample_offset;
124 break;
125 case SEEK_CUR:
126 case SEEK_FORCECUR:
127 offset = cur + sample_offset;
128 break;
129 default:
130 ast_log(LOG_WARNING, "invalid whence %d, assuming SEEK_SET\n", whence);
131 offset = sample_offset;
132 }
133 if (offset < 0) {
134 ast_log(LOG_WARNING, "negative offset %ld, resetting to 0\n", (long) offset);
135 offset = 0;
136 }
137 if (whence == SEEK_FORCECUR && offset > max) { /* extend the file */
138 size_t left = offset - max;
140
141 while (left) {
142 size_t written = fwrite(src, 1, MIN(left, BUF_SIZE), fs->f);
143 if (written < MIN(left, BUF_SIZE)) {
144 break; /* error */
145 }
146 left -= written;
147 }
148 ret = 0; /* successful */
149 } else {
150 if (offset > max) {
151 ast_log(LOG_WARNING, "offset too large %ld, truncating to %ld\n", (long) offset, (long) max);
152 offset = max;
153 }
154 ret = fseeko(fs->f, offset, SEEK_SET);
155 }
156 return ret;
157}
enum ast_format_cmp_res ast_format_cmp(const struct ast_format *format1, const struct ast_format *format2)
Compare two formats.
Definition: format.c:201
@ AST_FORMAT_CMP_EQUAL
Definition: format.h:36
struct ast_format_def * fmt
Definition: mod_format.h:103
#define MIN(a, b)
Definition: utils.h:231

References alaw_silence, ast_format_alaw, ast_format_cmp(), AST_FORMAT_CMP_EQUAL, ast_log, AST_LOG_WARNING, BUF_SIZE, errno, ast_filestream::f, ast_filestream::fmt, ast_format_def::format, LOG_WARNING, max, MIN, ast_frame::offset, SEEK_FORCECUR, ast_frame::src, and ulaw_silence.

Referenced by g722_seek().

◆ pcm_tell()

static off_t pcm_tell ( struct ast_filestream fs)
static

Definition at line 175 of file format_pcm.c.

176{
177 return ftello(fs->f);
178}

References ast_filestream::f.

Referenced by g722_tell().

◆ pcm_trunc()

static int pcm_trunc ( struct ast_filestream fs)
static

Definition at line 159 of file format_pcm.c.

160{
161 int cur, fd;
162
163 if ((fd = fileno(fs->f)) < 0) {
164 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for pcm filestream %p: %s\n", fs, strerror(errno));
165 return -1;
166 }
167 if ((cur = ftello(fs->f)) < 0) {
168 ast_log(AST_LOG_WARNING, "Unable to determine current position in pcm filestream %p: %s\n", fs, strerror(errno));
169 return -1;
170 }
171 /* Truncate file to current length */
172 return ftruncate(fd, cur);
173}

References ast_log, AST_LOG_WARNING, errno, and ast_filestream::f.

◆ pcm_write()

static int pcm_write ( struct ast_filestream fs,
struct ast_frame f 
)
static

Definition at line 180 of file format_pcm.c.

181{
182 int res;
183
184#ifdef REALTIME_WRITE
185 if (ast_format_cmp(s->fmt->format, ast_format_alaw) == AST_FORMAT_CMP_EQUAL) {
186 struct pcm_desc *pd = (struct pcm_desc *)fs->_private;
187 struct stat stat_buf;
188 unsigned long cur_time = get_time();
189 unsigned long fpos = ( cur_time - pd->start_time ) * 8; /* 8 bytes per msec */
190 /* Check if we have written to this position yet. If we have, then increment pos by one frame
191 * for some degree of protection against receiving packets in the same clock tick.
192 */
193
194 fstat(fileno(fs->f), &stat_buf );
195 if (stat_buf.st_size > fpos )
196 fpos += f->datalen; /* Incrementing with the size of this current frame */
197
198 if (stat_buf.st_size < fpos) {
199 /* fill the gap with 0x55 rather than 0. */
200 char buf[1024];
201 unsigned long cur, to_write;
202
203 cur = stat_buf.st_size;
204 if (fseek(fs->f, cur, SEEK_SET) < 0) {
205 ast_log( LOG_WARNING, "Cannot seek in file: %s\n", strerror(errno) );
206 return -1;
207 }
208 memset(buf, 0x55, 512);
209 while (cur < fpos) {
210 to_write = fpos - cur;
211 if (to_write > sizeof(buf))
212 to_write = sizeof(buf);
213 if (fwrite(buf, 1, to_write, fs->f) != to_write) {
214 ast_log(LOG_ERROR, "Failed to write to file: %s\n", strerror(errno));
215 return -1;
216 }
217 cur += to_write;
218 }
219 }
220
221 if (fseek(s->f, fpos, SEEK_SET) < 0) {
222 ast_log( LOG_WARNING, "Cannot seek in file: %s\n", strerror(errno) );
223 return -1;
224 }
225 }
226#endif /* REALTIME_WRITE */
227
228 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
229 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
230 return -1;
231 }
232 return 0;
233}
char buf[BUFSIZE]
Definition: eagi_proxy.c:66
#define LOG_ERROR

References ast_filestream::_private, ast_format_alaw, ast_format_cmp(), AST_FORMAT_CMP_EQUAL, ast_log, buf, ast_frame::data, ast_frame::datalen, errno, ast_filestream::f, ast_filestream::fmt, ast_format_def::format, LOG_ERROR, LOG_WARNING, and ast_frame::ptr.

◆ unload_module()

static int unload_module ( void  )
static

Definition at line 544 of file format_pcm.c.

545{
550}
int ast_format_def_unregister(const char *name)
Unregisters a file format.
Definition: file.c:162
char name[80]
Definition: mod_format.h:44

References alaw_f, ast_format_def_unregister(), au_f, g722_f, ast_format_def::name, and pcm_f.

Referenced by load_module().

◆ update_header()

static int update_header ( struct ast_filestream fs)
static

Definition at line 331 of file format_pcm.c.

332{
333 off_t cur, end;
334 uint32_t datalen;
335 int bytes;
336 struct au_desc *desc = fs->_private;
337 FILE *f = fs->f;
338
339 cur = ftell(f);
340 fseek(f, 0, SEEK_END);
341 end = ftell(f);
342 /* data starts 24 bytes in */
343 bytes = end - desc->hdr_size;
344 datalen = htoll(bytes);
345
346 if (cur < 0) {
347 ast_log(LOG_WARNING, "Unable to find our position\n");
348 return -1;
349 }
350 if (fseek(f, AU_HDR_DATA_SIZE_OFF * sizeof(uint32_t), SEEK_SET)) {
351 ast_log(LOG_WARNING, "Unable to set our position\n");
352 return -1;
353 }
354 if (fwrite(&datalen, 1, sizeof(datalen), f) != sizeof(datalen)) {
355 ast_log(LOG_WARNING, "Unable to set write file size\n");
356 return -1;
357 }
358 if (fseek(f, cur, SEEK_SET)) {
359 ast_log(LOG_WARNING, "Unable to return to position\n");
360 return -1;
361 }
362 return 0;
363}
char * end
Definition: eagi_proxy.c:73
#define AU_HDR_DATA_SIZE_OFF
Definition: format_pcm.c:242

References ast_filestream::_private, ast_log, AU_HDR_DATA_SIZE_OFF, desc, end, ast_filestream::f, and LOG_WARNING.

Referenced by au_trunc().

◆ write_header()

static int write_header ( struct ast_filestream fs)
static

Definition at line 365 of file format_pcm.c.

366{
367 struct au_desc *desc = fs->_private;
368 FILE *f = fs->f;
369
371
372 header[AU_HDR_MAGIC_OFF] = htoll((uint32_t) AU_MAGIC);
373 header[AU_HDR_HDR_SIZE_OFF] = htoll(desc->hdr_size);
377 header[AU_HDR_CHANNELS_OFF] = htoll(1);
378
379 /* Write an au header, ignoring sizes which will be filled in later */
380 fseek(f, 0, SEEK_SET);
381 if (fwrite(header, 1, MIN_AU_HEADER_SIZE, f) != MIN_AU_HEADER_SIZE) {
382 ast_log(LOG_WARNING, "Unable to write header\n");
383 return -1;
384 }
385 return 0;
386}

References ast_filestream::_private, 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_MAGIC, DEFAULT_SAMPLE_RATE, desc, ast_filestream::f, LOG_WARNING, and MIN_AU_HEADER_SIZE.

Referenced by au_rewrite().

Variable Documentation

◆ __mod_info

struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_LOAD_ORDER , .description = "Raw/Sun uLaw/ALaw 8KHz (PCM,PCMA,AU), G.722 16Khz" , .key = "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n" , .buildopt_sum = AST_BUILDOPT_SUM, .support_level = AST_MODULE_SUPPORT_CORE, .load = load_module, .unload = unload_module, .load_pri = AST_MODPRI_APP_DEPEND }
static

Definition at line 581 of file format_pcm.c.

◆ alaw_f

struct ast_format_def alaw_f
static

Definition at line 491 of file format_pcm.c.

Referenced by load_module(), and unload_module().

◆ alaw_silence

char alaw_silence[BUF_SIZE]
static

Definition at line 43 of file format_pcm.c.

Referenced by load_module(), and pcm_seek().

◆ ast_module_info

const struct ast_module_info* ast_module_info = &__mod_info
static

Definition at line 581 of file format_pcm.c.

◆ au_f

struct ast_format_def au_f
static

Definition at line 530 of file format_pcm.c.

Referenced by load_module(), and unload_module().

◆ g722_f

struct ast_format_def g722_f
static

Definition at line 519 of file format_pcm.c.

Referenced by load_module(), and unload_module().

◆ pcm_f

struct ast_format_def pcm_f
static

Definition at line 507 of file format_pcm.c.

Referenced by load_module(), and unload_module().

◆ ulaw_silence

char ulaw_silence[BUF_SIZE]
static

Definition at line 42 of file format_pcm.c.

Referenced by load_module(), and pcm_seek().