#include "asterisk.h"
#include "asterisk/translate.h"
#include "asterisk/module.h"
#include "asterisk/utils.h"
#include "ilbc/iLBC_encode.h"
#include "ilbc/iLBC_decode.h"
#include "slin_ilbc_ex.h"
#include "ilbc_slin_ex.h"
Go to the source code of this file.
Data Structures | |
struct | ilbc_coder_pvt |
Defines | |
#define | BUFFER_SAMPLES 8000 |
#define | ILBC_FRAME_LEN 50 |
#define | ILBC_MS 30 |
#define | ILBC_SAMPLES 240 |
#define | USE_ILBC_ENHANCER 0 |
Functions | |
static void | __reg_module (void) |
static void | __unreg_module (void) |
static int | ilbctolin_framein (struct ast_trans_pvt *pvt, struct ast_frame *f) |
decode a frame and store in outbuf | |
static int | ilbctolin_new (struct ast_trans_pvt *pvt) |
static struct ast_frame * | ilbctolin_sample (void) |
static int | lintoilbc_framein (struct ast_trans_pvt *pvt, struct ast_frame *f) |
store a frame into a temporary buffer, for later decoding | |
static struct ast_frame * | lintoilbc_frameout (struct ast_trans_pvt *pvt) |
encode the temporary buffer and generate a frame | |
static int | lintoilbc_new (struct ast_trans_pvt *pvt) |
static struct ast_frame * | lintoilbc_sample (void) |
static int | load_module (void) |
static int | unload_module (void) |
Variables | |
static struct ast_module_info | __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "iLBC Coder/Decoder" , .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 = "a9c98e5d177805051735cb5b0b16b0a0" , .load = load_module, .unload = unload_module, } |
static struct ast_module_info * | ast_module_info = &__mod_info |
static struct ast_translator | ilbctolin |
static struct ast_translator | lintoilbc |
Definition in file codec_ilbc.c.
#define BUFFER_SAMPLES 8000 |
Definition at line 53 of file codec_ilbc.c.
#define ILBC_FRAME_LEN 50 |
Definition at line 51 of file codec_ilbc.c.
Referenced by ilbctolin_framein(), and lintoilbc_frameout().
#define ILBC_MS 30 |
#define ILBC_SAMPLES 240 |
Definition at line 52 of file codec_ilbc.c.
Referenced by ilbc_read(), ilbc_seek(), ilbc_tell(), ilbctolin_framein(), ilbctolin_sample(), and lintoilbc_frameout().
#define USE_ILBC_ENHANCER 0 |
static void __reg_module | ( | void | ) | [static] |
Definition at line 239 of file codec_ilbc.c.
static void __unreg_module | ( | void | ) | [static] |
Definition at line 239 of file codec_ilbc.c.
static int ilbctolin_framein | ( | struct ast_trans_pvt * | pvt, | |
struct ast_frame * | f | |||
) | [static] |
decode a frame and store in outbuf
Definition at line 110 of file codec_ilbc.c.
References ast_log(), BUFFER_SAMPLES, ast_trans_pvt::datalen, ilbc_coder_pvt::dec, f, ast_trans_pvt::i16, ILBC_FRAME_LEN, ILBC_SAMPLES, LOG_WARNING, ast_trans_pvt::outbuf, ast_trans_pvt::pvt, and ast_trans_pvt::samples.
00111 { 00112 struct ilbc_coder_pvt *tmp = pvt->pvt; 00113 int plc_mode = 1; /* 1 = normal data, 0 = plc */ 00114 /* Assuming there's space left, decode into the current buffer at 00115 the tail location. Read in as many frames as there are */ 00116 int x,i; 00117 int16_t *dst = pvt->outbuf.i16; 00118 float tmpf[ILBC_SAMPLES]; 00119 00120 if (f->datalen == 0) { /* native PLC, set fake f->datalen and clear plc_mode */ 00121 f->datalen = ILBC_FRAME_LEN; 00122 f->samples = ILBC_SAMPLES; 00123 plc_mode = 0; /* do native plc */ 00124 pvt->samples += ILBC_SAMPLES; 00125 } 00126 00127 if (f->datalen % ILBC_FRAME_LEN) { 00128 ast_log(LOG_WARNING, "Huh? An ilbc frame that isn't a multiple of 50 bytes long from %s (%d)?\n", f->src, f->datalen); 00129 return -1; 00130 } 00131 00132 for (x=0; x < f->datalen ; x += ILBC_FRAME_LEN) { 00133 if (pvt->samples + ILBC_SAMPLES > BUFFER_SAMPLES) { 00134 ast_log(LOG_WARNING, "Out of buffer space\n"); 00135 return -1; 00136 } 00137 iLBC_decode(tmpf, plc_mode ? f->data.ptr + x : NULL, &tmp->dec, plc_mode); 00138 for ( i=0; i < ILBC_SAMPLES; i++) 00139 dst[pvt->samples + i] = tmpf[i]; 00140 pvt->samples += ILBC_SAMPLES; 00141 pvt->datalen += 2*ILBC_SAMPLES; 00142 } 00143 return 0; 00144 }
static int ilbctolin_new | ( | struct ast_trans_pvt * | pvt | ) | [static] |
Definition at line 71 of file codec_ilbc.c.
References ilbc_coder_pvt::dec, ILBC_MS, ast_trans_pvt::pvt, and USE_ILBC_ENHANCER.
00072 { 00073 struct ilbc_coder_pvt *tmp = pvt->pvt; 00074 00075 initDecode(&tmp->dec, ILBC_MS, USE_ILBC_ENHANCER); 00076 00077 return 0; 00078 }
static struct ast_frame* ilbctolin_sample | ( | void | ) | [static] |
Definition at line 94 of file codec_ilbc.c.
References AST_FORMAT_ILBC, AST_FRAME_VOICE, f, ILBC_SAMPLES, and ilbc_slin_ex.
00095 { 00096 static struct ast_frame f; 00097 f.frametype = AST_FRAME_VOICE; 00098 f.subclass = AST_FORMAT_ILBC; 00099 f.datalen = sizeof(ilbc_slin_ex); 00100 /* All frames are 30 ms long */ 00101 f.samples = ILBC_SAMPLES; 00102 f.mallocd = 0; 00103 f.offset = 0; 00104 f.src = __PRETTY_FUNCTION__; 00105 f.data.ptr = ilbc_slin_ex; 00106 return &f; 00107 }
static int lintoilbc_framein | ( | struct ast_trans_pvt * | pvt, | |
struct ast_frame * | f | |||
) | [static] |
store a frame into a temporary buffer, for later decoding
Definition at line 147 of file codec_ilbc.c.
References ilbc_coder_pvt::buf, f, ast_trans_pvt::pvt, and ast_trans_pvt::samples.
00148 { 00149 struct ilbc_coder_pvt *tmp = pvt->pvt; 00150 00151 /* Just add the frames to our stream */ 00152 /* XXX We should look at how old the rest of our stream is, and if it 00153 is too old, then we should overwrite it entirely, otherwise we can 00154 get artifacts of earlier talk that do not belong */ 00155 memcpy(tmp->buf + pvt->samples, f->data.ptr, f->datalen); 00156 pvt->samples += f->samples; 00157 return 0; 00158 }
static struct ast_frame* lintoilbc_frameout | ( | struct ast_trans_pvt * | pvt | ) | [static] |
encode the temporary buffer and generate a frame
Definition at line 161 of file codec_ilbc.c.
References ast_trans_frameout(), ilbc_coder_pvt::buf, ilbc_coder_pvt::enc, ILBC_FRAME_LEN, ILBC_SAMPLES, ast_trans_pvt::outbuf, ast_trans_pvt::pvt, ast_trans_pvt::samples, and ast_trans_pvt::uc.
00162 { 00163 struct ilbc_coder_pvt *tmp = pvt->pvt; 00164 int datalen = 0; 00165 int samples = 0; 00166 00167 /* We can't work on anything less than a frame in size */ 00168 if (pvt->samples < ILBC_SAMPLES) 00169 return NULL; 00170 while (pvt->samples >= ILBC_SAMPLES) { 00171 float tmpf[ILBC_SAMPLES]; 00172 int i; 00173 00174 /* Encode a frame of data */ 00175 for (i = 0 ; i < ILBC_SAMPLES ; i++) 00176 tmpf[i] = tmp->buf[samples + i]; 00177 iLBC_encode( pvt->outbuf.uc + datalen, tmpf, &tmp->enc); 00178 00179 datalen += ILBC_FRAME_LEN; 00180 samples += ILBC_SAMPLES; 00181 pvt->samples -= ILBC_SAMPLES; 00182 } 00183 00184 /* Move the data at the end of the buffer to the front */ 00185 if (pvt->samples) 00186 memmove(tmp->buf, tmp->buf + samples, pvt->samples * 2); 00187 00188 return ast_trans_frameout(pvt, datalen, samples); 00189 }
static int lintoilbc_new | ( | struct ast_trans_pvt * | pvt | ) | [static] |
Definition at line 62 of file codec_ilbc.c.
References ilbc_coder_pvt::enc, ILBC_MS, and ast_trans_pvt::pvt.
00063 { 00064 struct ilbc_coder_pvt *tmp = pvt->pvt; 00065 00066 initEncode(&tmp->enc, ILBC_MS); 00067 00068 return 0; 00069 }
static struct ast_frame* lintoilbc_sample | ( | void | ) | [static] |
Definition at line 80 of file codec_ilbc.c.
References AST_FORMAT_SLINEAR, AST_FRAME_VOICE, f, and slin_ilbc_ex.
00081 { 00082 static struct ast_frame f; 00083 f.frametype = AST_FRAME_VOICE; 00084 f.subclass = AST_FORMAT_SLINEAR; 00085 f.datalen = sizeof(slin_ilbc_ex); 00086 f.samples = sizeof(slin_ilbc_ex)/2; 00087 f.mallocd = 0; 00088 f.offset = 0; 00089 f.src = __PRETTY_FUNCTION__; 00090 f.data.ptr = slin_ilbc_ex; 00091 return &f; 00092 }
static int load_module | ( | void | ) | [static] |
Definition at line 225 of file codec_ilbc.c.
References AST_MODULE_LOAD_FAILURE, AST_MODULE_LOAD_SUCCESS, ast_register_translator, ast_unregister_translator(), ilbctolin, and lintoilbc.
00226 { 00227 int res; 00228 00229 res = ast_register_translator(&ilbctolin); 00230 if (!res) 00231 res=ast_register_translator(&lintoilbc); 00232 else 00233 ast_unregister_translator(&ilbctolin); 00234 if (res) 00235 return AST_MODULE_LOAD_FAILURE; 00236 return AST_MODULE_LOAD_SUCCESS; 00237 }
static int unload_module | ( | void | ) | [static] |
Definition at line 215 of file codec_ilbc.c.
References ast_unregister_translator(), ilbctolin, and lintoilbc.
00216 { 00217 int res; 00218 00219 res = ast_unregister_translator(&lintoilbc); 00220 res |= ast_unregister_translator(&ilbctolin); 00221 00222 return res; 00223 }
struct ast_module_info __mod_info = { .name = AST_MODULE, .flags = AST_MODFLAG_DEFAULT , .description = "iLBC Coder/Decoder" , .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 = "a9c98e5d177805051735cb5b0b16b0a0" , .load = load_module, .unload = unload_module, } [static] |
Definition at line 239 of file codec_ilbc.c.
struct ast_module_info* ast_module_info = &__mod_info [static] |
Definition at line 239 of file codec_ilbc.c.
struct ast_translator ilbctolin [static] |
struct ast_translator lintoilbc [static] |