#include "asterisk.h"
#include "asterisk/frame.h"
#include "asterisk/slinfactory.h"
#include "asterisk/translate.h"
Go to the source code of this file.
Functions | |
unsigned int | ast_slinfactory_available (const struct ast_slinfactory *sf) |
Retrieve number of samples currently in a slinfactory. | |
void | ast_slinfactory_destroy (struct ast_slinfactory *sf) |
Destroy the contents of a slinfactory. | |
int | ast_slinfactory_feed (struct ast_slinfactory *sf, struct ast_frame *f) |
Feed audio into a slinfactory. | |
void | ast_slinfactory_flush (struct ast_slinfactory *sf) |
Flush the contents of a slinfactory. | |
void | ast_slinfactory_init (struct ast_slinfactory *sf) |
Initialize a slinfactory. | |
int | ast_slinfactory_init_rate (struct ast_slinfactory *sf, unsigned int sample_rate) |
Initialize a slinfactory. | |
int | ast_slinfactory_read (struct ast_slinfactory *sf, short *buf, size_t samples) |
Read samples from a slinfactory. |
Definition in file slinfactory.c.
unsigned int ast_slinfactory_available | ( | const struct ast_slinfactory * | sf | ) |
Retrieve number of samples currently in a slinfactory.
sf | The slinfactory to peek into |
Definition at line 196 of file slinfactory.c.
References ast_slinfactory::size.
Referenced by ast_audiohook_write_frame(), audio_audiohook_write_list(), audiohook_read_frame_both(), audiohook_read_frame_single(), and softmix_bridge_thread().
00197 { 00198 return sf->size; 00199 }
void ast_slinfactory_destroy | ( | struct ast_slinfactory * | sf | ) |
Destroy the contents of a slinfactory.
sf | The slinfactory that is no longer needed |
Definition at line 64 of file slinfactory.c.
References ast_frfree, AST_LIST_REMOVE_HEAD, ast_translator_free_path(), f, and ast_slinfactory::trans.
Referenced by ast_audiohook_destroy(), and softmix_bridge_leave().
00065 { 00066 struct ast_frame *f; 00067 00068 if (sf->trans) { 00069 ast_translator_free_path(sf->trans); 00070 sf->trans = NULL; 00071 } 00072 00073 while ((f = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00074 ast_frfree(f); 00075 }
int ast_slinfactory_feed | ( | struct ast_slinfactory * | sf, | |
struct ast_frame * | f | |||
) |
Feed audio into a slinfactory.
sf | The slinfactory to feed into | |
f | Frame containing audio to feed in |
Definition at line 77 of file slinfactory.c.
References ast_frdup(), ast_frfree, ast_frisolate(), ast_getformatname(), AST_LIST_INSERT_TAIL, AST_LIST_NEXT, AST_LIST_TRAVERSE, ast_log(), ast_translate(), ast_translator_build_path(), ast_translator_free_path(), f, ast_slinfactory::format, LOG_WARNING, ast_slinfactory::output_format, ast_frame::samples, ast_slinfactory::size, and ast_slinfactory::trans.
Referenced by ast_audiohook_write_frame(), and softmix_bridge_write().
00078 { 00079 struct ast_frame *begin_frame = f, *duped_frame = NULL, *frame_ptr; 00080 unsigned int x = 0; 00081 00082 /* In some cases, we can be passed a frame which has no data in it, but 00083 * which has a positive number of samples defined. Once such situation is 00084 * when a jitter buffer is in use and the jitter buffer interpolates a frame. 00085 * The frame it produces has data set to NULL, datalen set to 0, and samples 00086 * set to either 160 or 240. 00087 */ 00088 if (!f->data.ptr) { 00089 return 0; 00090 } 00091 00092 if (f->subclass.codec != sf->output_format) { 00093 if (sf->trans && f->subclass.codec != sf->format) { 00094 ast_translator_free_path(sf->trans); 00095 sf->trans = NULL; 00096 } 00097 00098 if (!sf->trans) { 00099 if (!(sf->trans = ast_translator_build_path(sf->output_format, f->subclass.codec))) { 00100 ast_log(LOG_WARNING, "Cannot build a path from %s to %s\n", ast_getformatname(f->subclass.codec), 00101 ast_getformatname(sf->output_format)); 00102 return 0; 00103 } 00104 sf->format = f->subclass.codec; 00105 } 00106 00107 if (!(begin_frame = ast_translate(sf->trans, f, 0))) { 00108 return 0; 00109 } 00110 00111 if (!(duped_frame = ast_frisolate(begin_frame))) { 00112 return 0; 00113 } 00114 00115 if (duped_frame != begin_frame) { 00116 ast_frfree(begin_frame); 00117 } 00118 } else { 00119 if (sf->trans) { 00120 ast_translator_free_path(sf->trans); 00121 sf->trans = NULL; 00122 } 00123 if (!(duped_frame = ast_frdup(f))) 00124 return 0; 00125 } 00126 00127 AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list) { 00128 x++; 00129 } 00130 00131 /* if the frame was translated, the translator may have returned multiple 00132 frames, so process each of them 00133 */ 00134 for (begin_frame = duped_frame; begin_frame; begin_frame = AST_LIST_NEXT(begin_frame, frame_list)) { 00135 AST_LIST_INSERT_TAIL(&sf->queue, begin_frame, frame_list); 00136 sf->size += begin_frame->samples; 00137 } 00138 00139 return x; 00140 }
void ast_slinfactory_flush | ( | struct ast_slinfactory * | sf | ) |
Flush the contents of a slinfactory.
sf | The slinfactory to flush |
Definition at line 201 of file slinfactory.c.
References ast_frfree, AST_LIST_REMOVE_HEAD, ast_translator_free_path(), ast_slinfactory::hold, ast_slinfactory::holdlen, ast_slinfactory::offset, ast_slinfactory::size, and ast_slinfactory::trans.
Referenced by ast_audiohook_write_frame().
00202 { 00203 struct ast_frame *fr = NULL; 00204 00205 if (sf->trans) { 00206 ast_translator_free_path(sf->trans); 00207 sf->trans = NULL; 00208 } 00209 00210 while ((fr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00211 ast_frfree(fr); 00212 00213 sf->size = sf->holdlen = 0; 00214 sf->offset = sf->hold; 00215 00216 return; 00217 }
void ast_slinfactory_init | ( | struct ast_slinfactory * | sf | ) |
Initialize a slinfactory.
sf | The slinfactory to initialize |
Definition at line 39 of file slinfactory.c.
References AST_FORMAT_SLINEAR.
Referenced by ast_audiohook_init(), and softmix_bridge_join().
00040 { 00041 memset(sf, 0, sizeof(*sf)); 00042 sf->offset = sf->hold; 00043 sf->output_format = AST_FORMAT_SLINEAR; 00044 }
int ast_slinfactory_init_rate | ( | struct ast_slinfactory * | sf, | |
unsigned int | sample_rate | |||
) |
Initialize a slinfactory.
sf | The slinfactory to initialize | |
sample_rate | The output sample rate desired |
Definition at line 46 of file slinfactory.c.
References AST_FORMAT_SLINEAR, and AST_FORMAT_SLINEAR16.
00047 { 00048 memset(sf, 0, sizeof(*sf)); 00049 sf->offset = sf->hold; 00050 switch (sample_rate) { 00051 case 8000: 00052 sf->output_format = AST_FORMAT_SLINEAR; 00053 break; 00054 case 16000: 00055 sf->output_format = AST_FORMAT_SLINEAR16; 00056 break; 00057 default: 00058 return -1; 00059 } 00060 00061 return 0; 00062 }
int ast_slinfactory_read | ( | struct ast_slinfactory * | sf, | |
short * | buf, | |||
size_t | samples | |||
) |
Read samples from a slinfactory.
sf | The slinfactory to read from | |
buf | Buffer to put samples into | |
samples | Number of samples wanted |
Definition at line 142 of file slinfactory.c.
References ast_frfree, AST_LIST_REMOVE_HEAD, AST_SLINFACTORY_MAX_HOLD, ast_frame::data, ast_slinfactory::hold, ast_slinfactory::holdlen, ast_slinfactory::offset, ast_frame::offset, ast_frame::ptr, ast_frame::samples, and ast_slinfactory::size.
Referenced by audio_audiohook_write_list(), audiohook_read_frame_both(), audiohook_read_frame_single(), and softmix_bridge_thread().
00143 { 00144 struct ast_frame *frame_ptr; 00145 unsigned int sofar = 0, ineed, remain; 00146 short *frame_data, *offset = buf; 00147 00148 while (sofar < samples) { 00149 ineed = samples - sofar; 00150 00151 if (sf->holdlen) { 00152 if (sf->holdlen <= ineed) { 00153 memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset)); 00154 sofar += sf->holdlen; 00155 offset += sf->holdlen; 00156 sf->holdlen = 0; 00157 sf->offset = sf->hold; 00158 } else { 00159 remain = sf->holdlen - ineed; 00160 memcpy(offset, sf->offset, ineed * sizeof(*offset)); 00161 sofar += ineed; 00162 sf->offset += ineed; 00163 sf->holdlen = remain; 00164 } 00165 continue; 00166 } 00167 00168 if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) { 00169 frame_data = frame_ptr->data.ptr; 00170 00171 if (frame_ptr->samples <= ineed) { 00172 memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset)); 00173 sofar += frame_ptr->samples; 00174 offset += frame_ptr->samples; 00175 } else { 00176 remain = frame_ptr->samples - ineed; 00177 memcpy(offset, frame_data, ineed * sizeof(*offset)); 00178 sofar += ineed; 00179 frame_data += ineed; 00180 if (remain > (AST_SLINFACTORY_MAX_HOLD - sf->holdlen)) { 00181 remain = AST_SLINFACTORY_MAX_HOLD - sf->holdlen; 00182 } 00183 memcpy(sf->hold, frame_data, remain * sizeof(*offset)); 00184 sf->holdlen = remain; 00185 } 00186 ast_frfree(frame_ptr); 00187 } else { 00188 break; 00189 } 00190 } 00191 00192 sf->size -= sofar; 00193 return sofar; 00194 }