#include "asterisk.h"
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <vorbis/codec.h>
#include <vorbis/vorbisenc.h>
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/module.h"
Include dependency graph for format_ogg_vorbis.c:
Go to the source code of this file.
Data Structures | |
struct | vorbis_desc |
Defines | |
#define | BLOCK_SIZE 4096 |
#define | BUF_SIZE (2*SAMPLES_MAX) |
#define | SAMPLES_MAX 160 |
Functions | |
AST_MODULE_INFO_STANDARD (ASTERISK_GPL_KEY,"OGG/Vorbis audio") | |
static int | load_module (void) |
static void | ogg_vorbis_close (struct ast_filestream *fs) |
Close a OGG/Vorbis filestream. | |
static int | ogg_vorbis_open (struct ast_filestream *s) |
Create a new OGG/Vorbis filestream and set it up for reading. | |
static struct ast_frame * | ogg_vorbis_read (struct ast_filestream *fs, int *whennext) |
Read a frame full of audio data from the filestream. | |
static int | ogg_vorbis_rewrite (struct ast_filestream *s, const char *comment) |
Create a new OGG/Vorbis filestream and set it up for writing. | |
static int | ogg_vorbis_seek (struct ast_filestream *s, off_t sample_offset, int whence) |
Seek to a specific position in an OGG/Vorbis filestream. | |
static off_t | ogg_vorbis_tell (struct ast_filestream *s) |
static int | ogg_vorbis_trunc (struct ast_filestream *s) |
Trucate an OGG/Vorbis filestream. | |
static int | ogg_vorbis_write (struct ast_filestream *fs, struct ast_frame *f) |
Write audio data from a frame to an OGG/Vorbis filestream. | |
static int | read_samples (struct ast_filestream *fs, float ***pcm) |
Get audio data. | |
static int | unload_module (void) |
static void | write_stream (struct vorbis_desc *s, FILE *f) |
Write out any pending encoded data. | |
Variables | |
static struct ast_format | vorbis_f |
Definition in file format_ogg_vorbis.c.
#define BLOCK_SIZE 4096 |
Definition at line 68 of file format_ogg_vorbis.c.
Referenced by ogg_vorbis_open(), and read_samples().
#define BUF_SIZE (2*SAMPLES_MAX) |
Definition at line 66 of file format_ogg_vorbis.c.
#define SAMPLES_MAX 160 |
AST_MODULE_INFO_STANDARD | ( | ASTERISK_GPL_KEY | , | |
"OGG/Vorbis audio" | ||||
) |
static int load_module | ( | void | ) | [static] |
Definition at line 553 of file format_ogg_vorbis.c.
References ast_format_register, and vorbis_f.
00554 { 00555 return ast_format_register(&vorbis_f); 00556 }
static void ogg_vorbis_close | ( | struct ast_filestream * | fs | ) | [static] |
Close a OGG/Vorbis filestream.
fs | A OGG/Vorbis filestream. |
Definition at line 326 of file format_ogg_vorbis.c.
References ast_filestream::f, ast_filestream::private, s, and write_stream().
00327 { 00328 struct vorbis_desc *s = (struct vorbis_desc *)fs->private; 00329 00330 if (s->writing) { 00331 /* Tell the Vorbis encoder that the stream is finished 00332 * and write out the rest of the data */ 00333 vorbis_analysis_wrote(&s->vd, 0); 00334 write_stream(s, fs->f); 00335 } 00336 00337 ogg_stream_clear(&s->os); 00338 vorbis_block_clear(&s->vb); 00339 vorbis_dsp_clear(&s->vd); 00340 vorbis_comment_clear(&s->vc); 00341 vorbis_info_clear(&s->vi); 00342 00343 if (s->writing) { 00344 ogg_sync_clear(&s->oy); 00345 } 00346 }
static int ogg_vorbis_open | ( | struct ast_filestream * | s | ) | [static] |
Create a new OGG/Vorbis filestream and set it up for reading.
s | File that points to on disk storage of the OGG/Vorbis data. |
Definition at line 95 of file format_ogg_vorbis.c.
References ast_log(), BLOCK_SIZE, error(), LOG_ERROR, vorbis_desc::og, vorbis_desc::op, vorbis_desc::os, vorbis_desc::oy, result, s, vorbis_desc::vc, vorbis_desc::vi, and vorbis_desc::writing.
00096 { 00097 int i; 00098 int bytes; 00099 int result; 00100 char **ptr; 00101 char *buffer; 00102 struct vorbis_desc *tmp = (struct vorbis_desc *)s->private; 00103 00104 tmp->writing = 0; 00105 00106 ogg_sync_init(&tmp->oy); 00107 00108 buffer = ogg_sync_buffer(&tmp->oy, BLOCK_SIZE); 00109 bytes = fread(buffer, 1, BLOCK_SIZE, s->f); 00110 ogg_sync_wrote(&tmp->oy, bytes); 00111 00112 result = ogg_sync_pageout(&tmp->oy, &tmp->og); 00113 if (result != 1) { 00114 if(bytes < BLOCK_SIZE) { 00115 ast_log(LOG_ERROR, "Run out of data...\n"); 00116 } else { 00117 ast_log(LOG_ERROR, "Input does not appear to be an Ogg bitstream.\n"); 00118 } 00119 ogg_sync_clear(&tmp->oy); 00120 return -1; 00121 } 00122 00123 ogg_stream_init(&tmp->os, ogg_page_serialno(&tmp->og)); 00124 vorbis_info_init(&tmp->vi); 00125 vorbis_comment_init(&tmp->vc); 00126 00127 if (ogg_stream_pagein(&tmp->os, &tmp->og) < 0) { 00128 ast_log(LOG_ERROR, "Error reading first page of Ogg bitstream data.\n"); 00129 error: 00130 ogg_stream_clear(&tmp->os); 00131 vorbis_comment_clear(&tmp->vc); 00132 vorbis_info_clear(&tmp->vi); 00133 ogg_sync_clear(&tmp->oy); 00134 return -1; 00135 } 00136 00137 if (ogg_stream_packetout(&tmp->os, &tmp->op) != 1) { 00138 ast_log(LOG_ERROR, "Error reading initial header packet.\n"); 00139 goto error; 00140 } 00141 00142 if (vorbis_synthesis_headerin(&tmp->vi, &tmp->vc, &tmp->op) < 0) { 00143 ast_log(LOG_ERROR, "This Ogg bitstream does not contain Vorbis audio data.\n"); 00144 goto error; 00145 } 00146 00147 for (i = 0; i < 2 ; ) { 00148 while (i < 2) { 00149 result = ogg_sync_pageout(&tmp->oy, &tmp->og); 00150 if (result == 0) 00151 break; 00152 if (result == 1) { 00153 ogg_stream_pagein(&tmp->os, &tmp->og); 00154 while(i < 2) { 00155 result = ogg_stream_packetout(&tmp->os,&tmp->op); 00156 if(result == 0) 00157 break; 00158 if(result < 0) { 00159 ast_log(LOG_ERROR, "Corrupt secondary header. Exiting.\n"); 00160 goto error; 00161 } 00162 vorbis_synthesis_headerin(&tmp->vi, &tmp->vc, &tmp->op); 00163 i++; 00164 } 00165 } 00166 } 00167 00168 buffer = ogg_sync_buffer(&tmp->oy, BLOCK_SIZE); 00169 bytes = fread(buffer, 1, BLOCK_SIZE, s->f); 00170 if (bytes == 0 && i < 2) { 00171 ast_log(LOG_ERROR, "End of file before finding all Vorbis headers!\n"); 00172 goto error; 00173 } 00174 ogg_sync_wrote(&tmp->oy, bytes); 00175 } 00176 00177 for (ptr = tmp->vc.user_comments; *ptr; ptr++) 00178 ast_log(LOG_DEBUG, "OGG/Vorbis comment: %s\n", *ptr); 00179 ast_log(LOG_DEBUG, "OGG/Vorbis bitstream is %d channel, %ldHz\n", tmp->vi.channels, tmp->vi.rate); 00180 ast_log(LOG_DEBUG, "OGG/Vorbis file encoded by: %s\n", tmp->vc.vendor); 00181 00182 if (tmp->vi.channels != 1) { 00183 ast_log(LOG_ERROR, "Only monophonic OGG/Vorbis files are currently supported!\n"); 00184 goto error; 00185 } 00186 00187 if (tmp->vi.rate != DEFAULT_SAMPLE_RATE) { 00188 ast_log(LOG_ERROR, "Only 8000Hz OGG/Vorbis files are currently supported!\n"); 00189 vorbis_block_clear(&tmp->vb); 00190 vorbis_dsp_clear(&tmp->vd); 00191 goto error; 00192 } 00193 00194 vorbis_synthesis_init(&tmp->vd, &tmp->vi); 00195 vorbis_block_init(&tmp->vd, &tmp->vb); 00196 00197 return 0; 00198 }
static struct ast_frame* ogg_vorbis_read | ( | struct ast_filestream * | fs, | |
int * | whennext | |||
) | [static] |
Read a frame full of audio data from the filestream.
fs | The filestream. | |
whennext | Number of sample times to schedule the next call. |
Definition at line 433 of file format_ogg_vorbis.c.
References AST_FORMAT_SLINEAR, AST_FRAME_SET_BUFFER, AST_FRAME_VOICE, AST_FRIENDLY_OFFSET, ast_log(), ast_filestream::buf, BUF_SIZE, ast_frame::data, ast_frame::datalen, ast_filestream::fr, ast_frame::frametype, len, LOG_WARNING, ast_frame::mallocd, ast_filestream::private, read_samples(), s, ast_frame::samples, SAMPLES_MAX, and ast_frame::subclass.
00435 { 00436 int clipflag = 0; 00437 int i; 00438 int j; 00439 double accumulator[SAMPLES_MAX]; 00440 int val; 00441 int samples_in; 00442 int samples_out = 0; 00443 struct vorbis_desc *s = (struct vorbis_desc *)fs->private; 00444 short *buf; /* SLIN data buffer */ 00445 00446 fs->fr.frametype = AST_FRAME_VOICE; 00447 fs->fr.subclass = AST_FORMAT_SLINEAR; 00448 fs->fr.mallocd = 0; 00449 AST_FRAME_SET_BUFFER(&fs->fr, fs->buf, AST_FRIENDLY_OFFSET, BUF_SIZE); 00450 buf = (short *)(fs->fr.data); /* SLIN data buffer */ 00451 00452 while (samples_out != SAMPLES_MAX) { 00453 float **pcm; 00454 int len = SAMPLES_MAX - samples_out; 00455 00456 /* See ifVorbis decoder has some audio data for us ... */ 00457 samples_in = read_samples(fs, &pcm); 00458 if (samples_in <= 0) 00459 break; 00460 00461 /* Got some audio data from Vorbis... */ 00462 /* Convert the float audio data to 16-bit signed linear */ 00463 00464 clipflag = 0; 00465 if (samples_in > len) 00466 samples_in = len; 00467 for (j = 0; j < samples_in; j++) 00468 accumulator[j] = 0.0; 00469 00470 for (i = 0; i < s->vi.channels; i++) { 00471 float *mono = pcm[i]; 00472 for (j = 0; j < samples_in; j++) 00473 accumulator[j] += mono[j]; 00474 } 00475 00476 for (j = 0; j < samples_in; j++) { 00477 val = accumulator[j] * 32767.0 / s->vi.channels; 00478 if (val > 32767) { 00479 val = 32767; 00480 clipflag = 1; 00481 } else if (val < -32768) { 00482 val = -32768; 00483 clipflag = 1; 00484 } 00485 buf[samples_out + j] = val; 00486 } 00487 00488 if (clipflag) 00489 ast_log(LOG_WARNING, "Clipping in frame %ld\n", (long) (s->vd.sequence)); 00490 /* Tell the Vorbis decoder how many samples we actually used. */ 00491 vorbis_synthesis_read(&s->vd, samples_in); 00492 samples_out += samples_in; 00493 } 00494 00495 if (samples_out > 0) { 00496 fs->fr.datalen = samples_out * 2; 00497 fs->fr.samples = samples_out; 00498 *whennext = samples_out; 00499 00500 return &fs->fr; 00501 } else { 00502 return NULL; 00503 } 00504 }
static int ogg_vorbis_rewrite | ( | struct ast_filestream * | s, | |
const char * | comment | |||
) | [static] |
Create a new OGG/Vorbis filestream and set it up for writing.
s | File pointer that points to on-disk storage. | |
comment | Comment that should be embedded in the OGG/Vorbis file. |
Definition at line 206 of file format_ogg_vorbis.c.
References ast_log(), ast_random(), DEFAULT_SAMPLE_RATE, vorbis_desc::eos, LOG_ERROR, vorbis_desc::og, vorbis_desc::os, s, vorbis_desc::vb, vorbis_desc::vc, vorbis_desc::vd, vorbis_desc::vi, and vorbis_desc::writing.
00208 { 00209 ogg_packet header; 00210 ogg_packet header_comm; 00211 ogg_packet header_code; 00212 struct vorbis_desc *tmp = (struct vorbis_desc *)s->private; 00213 00214 tmp->writing = 1; 00215 00216 vorbis_info_init(&tmp->vi); 00217 00218 if (vorbis_encode_init_vbr(&tmp->vi, 1, DEFAULT_SAMPLE_RATE, 0.4)) { 00219 ast_log(LOG_ERROR, "Unable to initialize Vorbis encoder!\n"); 00220 return -1; 00221 } 00222 00223 vorbis_comment_init(&tmp->vc); 00224 vorbis_comment_add_tag(&tmp->vc, "ENCODER", "Asterisk PBX"); 00225 if (comment) 00226 vorbis_comment_add_tag(&tmp->vc, "COMMENT", (char *) comment); 00227 00228 vorbis_analysis_init(&tmp->vd, &tmp->vi); 00229 vorbis_block_init(&tmp->vd, &tmp->vb); 00230 00231 ogg_stream_init(&tmp->os, ast_random()); 00232 00233 vorbis_analysis_headerout(&tmp->vd, &tmp->vc, &header, &header_comm, 00234 &header_code); 00235 ogg_stream_packetin(&tmp->os, &header); 00236 ogg_stream_packetin(&tmp->os, &header_comm); 00237 ogg_stream_packetin(&tmp->os, &header_code); 00238 00239 while (!tmp->eos) { 00240 if (ogg_stream_flush(&tmp->os, &tmp->og) == 0) 00241 break; 00242 fwrite(tmp->og.header, 1, tmp->og.header_len, s->f); 00243 fwrite(tmp->og.body, 1, tmp->og.body_len, s->f); 00244 if (ogg_page_eos(&tmp->og)) 00245 tmp->eos = 1; 00246 } 00247 00248 return 0; 00249 }
static int ogg_vorbis_seek | ( | struct ast_filestream * | s, | |
off_t | sample_offset, | |||
int | whence | |||
) | [static] |
Seek to a specific position in an OGG/Vorbis filestream.
s | The filestream to truncate. | |
sample_offset | New position for the filestream, measured in 8KHz samples. | |
whence | Location to measure |
Definition at line 525 of file format_ogg_vorbis.c.
References ast_log(), and LOG_WARNING.
00526 { 00527 ast_log(LOG_WARNING, "Seeking is not supported on OGG/Vorbis streams!\n"); 00528 return -1; 00529 }
static off_t ogg_vorbis_tell | ( | struct ast_filestream * | s | ) | [static] |
Definition at line 531 of file format_ogg_vorbis.c.
References ast_log(), and LOG_WARNING.
00532 { 00533 ast_log(LOG_WARNING, "Telling is not supported on OGG/Vorbis streams!\n"); 00534 return -1; 00535 }
static int ogg_vorbis_trunc | ( | struct ast_filestream * | s | ) | [static] |
Trucate an OGG/Vorbis filestream.
s | The filestream to truncate. |
Definition at line 512 of file format_ogg_vorbis.c.
References ast_log(), and LOG_WARNING.
00513 { 00514 ast_log(LOG_WARNING, "Truncation is not supported on OGG/Vorbis streams!\n"); 00515 return -1; 00516 }
static int ogg_vorbis_write | ( | struct ast_filestream * | fs, | |
struct ast_frame * | f | |||
) | [static] |
Write audio data from a frame to an OGG/Vorbis filestream.
fs | An OGG/Vorbis filestream. | |
f | A frame containing audio to be written to the filestream. |
Definition at line 284 of file format_ogg_vorbis.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, ast_log(), ast_filestream::f, f, LOG_ERROR, LOG_WARNING, ast_filestream::private, s, and write_stream().
00285 { 00286 int i; 00287 float **buffer; 00288 short *data; 00289 struct vorbis_desc *s = (struct vorbis_desc *)fs->private; 00290 00291 if (!s->writing) { 00292 ast_log(LOG_ERROR, "This stream is not set up for writing!\n"); 00293 return -1; 00294 } 00295 00296 if (f->frametype != AST_FRAME_VOICE) { 00297 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); 00298 return -1; 00299 } 00300 if (f->subclass != AST_FORMAT_SLINEAR) { 00301 ast_log(LOG_WARNING, "Asked to write non-SLINEAR frame (%d)!\n", 00302 f->subclass); 00303 return -1; 00304 } 00305 if (!f->datalen) 00306 return -1; 00307 00308 data = (short *) f->data; 00309 00310 buffer = vorbis_analysis_buffer(&s->vd, f->samples); 00311 00312 for (i = 0; i < f->samples; i++) 00313 buffer[0][i] = (double)data[i] / 32768.0; 00314 00315 vorbis_analysis_wrote(&s->vd, f->samples); 00316 00317 write_stream(s, fs->f); 00318 00319 return 0; 00320 }
static int read_samples | ( | struct ast_filestream * | fs, | |
float *** | pcm | |||
) | [static] |
Get audio data.
fs | An OGG/Vorbis filestream. | |
pcm | Pointer to a buffere to store audio data in. |
Definition at line 354 of file format_ogg_vorbis.c.
References ast_log(), BLOCK_SIZE, ast_filestream::f, LOG_WARNING, ast_filestream::private, result, and s.
Referenced by ogg_vorbis_read().
00355 { 00356 int samples_in; 00357 int result; 00358 char *buffer; 00359 int bytes; 00360 struct vorbis_desc *s = (struct vorbis_desc *)fs->private; 00361 00362 while (1) { 00363 samples_in = vorbis_synthesis_pcmout(&s->vd, pcm); 00364 if (samples_in > 0) { 00365 return samples_in; 00366 } 00367 00368 /* The Vorbis decoder needs more data... */ 00369 /* See ifOGG has any packets in the current page for the Vorbis decoder. */ 00370 result = ogg_stream_packetout(&s->os, &s->op); 00371 if (result > 0) { 00372 /* Yes OGG had some more packets for the Vorbis decoder. */ 00373 if (vorbis_synthesis(&s->vb, &s->op) == 0) { 00374 vorbis_synthesis_blockin(&s->vd, &s->vb); 00375 } 00376 00377 continue; 00378 } 00379 00380 if (result < 0) 00381 ast_log(LOG_WARNING, 00382 "Corrupt or missing data at this page position; continuing...\n"); 00383 00384 /* No more packets left in the current page... */ 00385 00386 if (s->eos) { 00387 /* No more pages left in the stream */ 00388 return -1; 00389 } 00390 00391 while (!s->eos) { 00392 /* See ifOGG has any pages in it's internal buffers */ 00393 result = ogg_sync_pageout(&s->oy, &s->og); 00394 if (result > 0) { 00395 /* Yes, OGG has more pages in it's internal buffers, 00396 add the page to the stream state */ 00397 result = ogg_stream_pagein(&s->os, &s->og); 00398 if (result == 0) { 00399 /* Yes, got a new,valid page */ 00400 if (ogg_page_eos(&s->og)) { 00401 s->eos = 1; 00402 } 00403 break; 00404 } 00405 ast_log(LOG_WARNING, 00406 "Invalid page in the bitstream; continuing...\n"); 00407 } 00408 00409 if (result < 0) 00410 ast_log(LOG_WARNING, 00411 "Corrupt or missing data in bitstream; continuing...\n"); 00412 00413 /* No, we need to read more data from the file descrptor */ 00414 /* get a buffer from OGG to read the data into */ 00415 buffer = ogg_sync_buffer(&s->oy, BLOCK_SIZE); 00416 /* read more data from the file descriptor */ 00417 bytes = fread(buffer, 1, BLOCK_SIZE, fs->f); 00418 /* Tell OGG how many bytes we actually read into the buffer */ 00419 ogg_sync_wrote(&s->oy, bytes); 00420 if (bytes == 0) { 00421 s->eos = 1; 00422 } 00423 } 00424 } 00425 }
static int unload_module | ( | void | ) | [static] |
Definition at line 558 of file format_ogg_vorbis.c.
References ast_format_unregister(), ast_format::name, and vorbis_f.
00559 { 00560 return ast_format_unregister(vorbis_f.name); 00561 }
static void write_stream | ( | struct vorbis_desc * | s, | |
FILE * | f | |||
) | [static] |
Write out any pending encoded data.
s | An OGG/Vorbis filestream. | |
f | The file to write to. |
Definition at line 256 of file format_ogg_vorbis.c.
References s.
Referenced by ogg_vorbis_close(), and ogg_vorbis_write().
00257 { 00258 while (vorbis_analysis_blockout(&s->vd, &s->vb) == 1) { 00259 vorbis_analysis(&s->vb, NULL); 00260 vorbis_bitrate_addblock(&s->vb); 00261 00262 while (vorbis_bitrate_flushpacket(&s->vd, &s->op)) { 00263 ogg_stream_packetin(&s->os, &s->op); 00264 while (!s->eos) { 00265 if (ogg_stream_pageout(&s->os, &s->og) == 0) { 00266 break; 00267 } 00268 fwrite(s->og.header, 1, s->og.header_len, f); 00269 fwrite(s->og.body, 1, s->og.body_len, f); 00270 if (ogg_page_eos(&s->og)) { 00271 s->eos = 1; 00272 } 00273 } 00274 } 00275 } 00276 }
struct ast_format vorbis_f [static] |
Definition at line 537 of file format_ogg_vorbis.c.
Referenced by load_module(), and unload_module().