#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 192 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().
00193 { 00194 return sf->size; 00195 }
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 60 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().
00061 { 00062 struct ast_frame *f; 00063 00064 if (sf->trans) { 00065 ast_translator_free_path(sf->trans); 00066 sf->trans = NULL; 00067 } 00068 00069 while ((f = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00070 ast_frfree(f); 00071 }
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 73 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().
00074 { 00075 struct ast_frame *begin_frame = f, *duped_frame = NULL, *frame_ptr; 00076 unsigned int x = 0; 00077 00078 /* In some cases, we can be passed a frame which has no data in it, but 00079 * which has a positive number of samples defined. Once such situation is 00080 * when a jitter buffer is in use and the jitter buffer interpolates a frame. 00081 * The frame it produces has data set to NULL, datalen set to 0, and samples 00082 * set to either 160 or 240. 00083 */ 00084 if (!f->data.ptr) { 00085 return 0; 00086 } 00087 00088 if (f->subclass.codec != sf->output_format) { 00089 if (sf->trans && f->subclass.codec != sf->format) { 00090 ast_translator_free_path(sf->trans); 00091 sf->trans = NULL; 00092 } 00093 00094 if (!sf->trans) { 00095 if (!(sf->trans = ast_translator_build_path(sf->output_format, f->subclass.codec))) { 00096 ast_log(LOG_WARNING, "Cannot build a path from %s to %s\n", ast_getformatname(f->subclass.codec), 00097 ast_getformatname(sf->output_format)); 00098 return 0; 00099 } 00100 sf->format = f->subclass.codec; 00101 } 00102 00103 if (!(begin_frame = ast_translate(sf->trans, f, 0))) { 00104 return 0; 00105 } 00106 00107 if (!(duped_frame = ast_frisolate(begin_frame))) { 00108 return 0; 00109 } 00110 00111 if (duped_frame != begin_frame) { 00112 ast_frfree(begin_frame); 00113 } 00114 } else { 00115 if (sf->trans) { 00116 ast_translator_free_path(sf->trans); 00117 sf->trans = NULL; 00118 } 00119 if (!(duped_frame = ast_frdup(f))) 00120 return 0; 00121 } 00122 00123 AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list) { 00124 x++; 00125 } 00126 00127 /* if the frame was translated, the translator may have returned multiple 00128 frames, so process each of them 00129 */ 00130 for (begin_frame = duped_frame; begin_frame; begin_frame = AST_LIST_NEXT(begin_frame, frame_list)) { 00131 AST_LIST_INSERT_TAIL(&sf->queue, begin_frame, frame_list); 00132 sf->size += begin_frame->samples; 00133 } 00134 00135 return x; 00136 }
void ast_slinfactory_flush | ( | struct ast_slinfactory * | sf | ) |
Flush the contents of a slinfactory.
sf | The slinfactory to flush |
Definition at line 197 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().
00198 { 00199 struct ast_frame *fr = NULL; 00200 00201 if (sf->trans) { 00202 ast_translator_free_path(sf->trans); 00203 sf->trans = NULL; 00204 } 00205 00206 while ((fr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00207 ast_frfree(fr); 00208 00209 sf->size = sf->holdlen = 0; 00210 sf->offset = sf->hold; 00211 00212 return; 00213 }
void ast_slinfactory_init | ( | struct ast_slinfactory * | sf | ) |
Initialize a slinfactory.
sf | The slinfactory to initialize |
Definition at line 35 of file slinfactory.c.
References AST_FORMAT_SLINEAR.
Referenced by ast_audiohook_init(), and softmix_bridge_join().
00036 { 00037 memset(sf, 0, sizeof(*sf)); 00038 sf->offset = sf->hold; 00039 sf->output_format = AST_FORMAT_SLINEAR; 00040 }
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 42 of file slinfactory.c.
References AST_FORMAT_SLINEAR, and AST_FORMAT_SLINEAR16.
00043 { 00044 memset(sf, 0, sizeof(*sf)); 00045 sf->offset = sf->hold; 00046 switch (sample_rate) { 00047 case 8000: 00048 sf->output_format = AST_FORMAT_SLINEAR; 00049 break; 00050 case 16000: 00051 sf->output_format = AST_FORMAT_SLINEAR16; 00052 break; 00053 default: 00054 return -1; 00055 } 00056 00057 return 0; 00058 }
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 138 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().
00139 { 00140 struct ast_frame *frame_ptr; 00141 unsigned int sofar = 0, ineed, remain; 00142 short *frame_data, *offset = buf; 00143 00144 while (sofar < samples) { 00145 ineed = samples - sofar; 00146 00147 if (sf->holdlen) { 00148 if (sf->holdlen <= ineed) { 00149 memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset)); 00150 sofar += sf->holdlen; 00151 offset += sf->holdlen; 00152 sf->holdlen = 0; 00153 sf->offset = sf->hold; 00154 } else { 00155 remain = sf->holdlen - ineed; 00156 memcpy(offset, sf->offset, ineed * sizeof(*offset)); 00157 sofar += ineed; 00158 sf->offset += ineed; 00159 sf->holdlen = remain; 00160 } 00161 continue; 00162 } 00163 00164 if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) { 00165 frame_data = frame_ptr->data.ptr; 00166 00167 if (frame_ptr->samples <= ineed) { 00168 memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset)); 00169 sofar += frame_ptr->samples; 00170 offset += frame_ptr->samples; 00171 } else { 00172 remain = frame_ptr->samples - ineed; 00173 memcpy(offset, frame_data, ineed * sizeof(*offset)); 00174 sofar += ineed; 00175 frame_data += ineed; 00176 if (remain > (AST_SLINFACTORY_MAX_HOLD - sf->holdlen)) { 00177 remain = AST_SLINFACTORY_MAX_HOLD - sf->holdlen; 00178 } 00179 memcpy(sf->hold, frame_data, remain * sizeof(*offset)); 00180 sf->holdlen = remain; 00181 } 00182 ast_frfree(frame_ptr); 00183 } else { 00184 break; 00185 } 00186 } 00187 00188 sf->size -= sofar; 00189 return sofar; 00190 }