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Data Structures | |
struct | ast_slinfactory |
Defines | |
#define | AST_SLINFACTORY_MAX_HOLD 1280 |
Functions | |
unsigned int | ast_slinfactory_available (const struct ast_slinfactory *sf) |
Retrieve number of samples currently in an 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 an slinfactory. | |
void | ast_slinfactory_flush (struct ast_slinfactory *sf) |
Flush the contents of an slinfactory. | |
void | ast_slinfactory_init (struct ast_slinfactory *sf) |
Initialize an slinfactory. | |
int | ast_slinfactory_read (struct ast_slinfactory *sf, short *buf, size_t samples) |
Read samples from an slinfactory. |
Definition in file slinfactory.h.
#define AST_SLINFACTORY_MAX_HOLD 1280 |
unsigned int ast_slinfactory_available | ( | const struct ast_slinfactory * | sf | ) |
Retrieve number of samples currently in an slinfactory.
Definition at line 213 of file slinfactory.c.
References ast_slinfactory::size.
Referenced by ast_audiohook_write_frame(), audio_audiohook_write_list(), audiohook_read_frame_both(), and audiohook_read_frame_single().
00214 { 00215 return sf->size; 00216 }
void ast_slinfactory_destroy | ( | struct ast_slinfactory * | sf | ) |
Destroy the contents of a slinfactory.
Definition at line 59 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().
00060 { 00061 struct ast_frame *f; 00062 00063 if (sf->trans) { 00064 ast_translator_free_path(sf->trans); 00065 sf->trans = NULL; 00066 } 00067 00068 while ((f = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00069 ast_frfree(f); 00070 }
int ast_slinfactory_feed | ( | struct ast_slinfactory * | sf, | |
struct ast_frame * | f | |||
) |
Feed audio into an slinfactory.
Definition at line 80 of file slinfactory.c.
References AST_FORMAT_G722, AST_FORMAT_SLINEAR, AST_FORMAT_SLINEAR16, 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_frame::samples, ast_slinfactory::size, and ast_slinfactory::trans.
Referenced by ast_audiohook_write_frame().
00081 { 00082 struct ast_frame *begin_frame = f, *duped_frame = NULL, *frame_ptr; 00083 unsigned int x = 0; 00084 00085 /* In some cases, we can be passed a frame which has no data in it, but 00086 * which has a positive number of samples defined. Once such situation is 00087 * when a jitter buffer is in use and the jitter buffer interpolates a frame. 00088 * The frame it produces has data set to NULL, datalen set to 0, and samples 00089 * set to either 160 or 240. 00090 */ 00091 if (!f->data.ptr) { 00092 return 0; 00093 } 00094 00095 if (f->subclass != AST_FORMAT_SLINEAR && f->subclass != AST_FORMAT_SLINEAR16) { 00096 if (sf->trans && f->subclass != sf->format) { 00097 ast_translator_free_path(sf->trans); 00098 sf->trans = NULL; 00099 } 00100 00101 if (!sf->trans) { 00102 if (!(sf->trans = ast_translator_build_path((f->subclass == AST_FORMAT_G722 ? AST_FORMAT_SLINEAR16 : AST_FORMAT_SLINEAR), f->subclass))) { 00103 ast_log(LOG_WARNING, "Cannot build a path from %s to slin\n", ast_getformatname(f->subclass)); 00104 return 0; 00105 } 00106 sf->format = f->subclass; 00107 } 00108 00109 if (!(begin_frame = ast_translate(sf->trans, f, 0))) { 00110 return 0; 00111 } 00112 00113 if (!(duped_frame = ast_frisolate(begin_frame))) { 00114 return 0; 00115 } 00116 00117 if (duped_frame != begin_frame) { 00118 ast_frfree(begin_frame); 00119 } 00120 } else { 00121 if (sf->trans) { 00122 ast_translator_free_path(sf->trans); 00123 sf->trans = NULL; 00124 } 00125 if (!(duped_frame = ast_frdup(f))) 00126 return 0; 00127 } 00128 00129 AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list) 00130 x++; 00131 00132 /* if the frame was translated, the translator may have returned multiple 00133 frames, so process each of them 00134 */ 00135 for (begin_frame = duped_frame; begin_frame; begin_frame = AST_LIST_NEXT(begin_frame, frame_list)) { 00136 AST_LIST_INSERT_TAIL(&sf->queue, begin_frame, frame_list); 00137 sf->size += begin_frame->samples; 00138 } 00139 00140 return x; 00141 }
void ast_slinfactory_flush | ( | struct ast_slinfactory * | sf | ) |
Flush the contents of an slinfactory.
Definition at line 225 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().
00226 { 00227 struct ast_frame *fr = NULL; 00228 00229 if (sf->trans) { 00230 ast_translator_free_path(sf->trans); 00231 sf->trans = NULL; 00232 } 00233 00234 while ((fr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00235 ast_frfree(fr); 00236 00237 sf->size = sf->holdlen = 0; 00238 sf->offset = sf->hold; 00239 00240 return; 00241 }
void ast_slinfactory_init | ( | struct ast_slinfactory * | sf | ) |
Initialize an slinfactory.
Definition at line 42 of file slinfactory.c.
Referenced by ast_audiohook_init().
int ast_slinfactory_read | ( | struct ast_slinfactory * | sf, | |
short * | buf, | |||
size_t | samples | |||
) |
Read samples from an slinfactory.
Definition at line 152 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(), and audiohook_read_frame_single().
00153 { 00154 struct ast_frame *frame_ptr; 00155 unsigned int sofar = 0, ineed, remain; 00156 short *frame_data, *offset = buf; 00157 00158 while (sofar < samples) { 00159 ineed = samples - sofar; 00160 00161 if (sf->holdlen) { 00162 if (sf->holdlen <= ineed) { 00163 memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset)); 00164 sofar += sf->holdlen; 00165 offset += sf->holdlen; 00166 sf->holdlen = 0; 00167 sf->offset = sf->hold; 00168 } else { 00169 remain = sf->holdlen - ineed; 00170 memcpy(offset, sf->offset, ineed * sizeof(*offset)); 00171 sofar += ineed; 00172 sf->offset += ineed; 00173 sf->holdlen = remain; 00174 } 00175 continue; 00176 } 00177 00178 if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) { 00179 frame_data = frame_ptr->data.ptr; 00180 00181 if (frame_ptr->samples <= ineed) { 00182 memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset)); 00183 sofar += frame_ptr->samples; 00184 offset += frame_ptr->samples; 00185 } else { 00186 remain = frame_ptr->samples - ineed; 00187 memcpy(offset, frame_data, ineed * sizeof(*offset)); 00188 sofar += ineed; 00189 frame_data += ineed; 00190 if (remain > (AST_SLINFACTORY_MAX_HOLD - sf->holdlen)) { 00191 remain = AST_SLINFACTORY_MAX_HOLD - sf->holdlen; 00192 } 00193 memcpy(sf->hold, frame_data, remain * sizeof(*offset)); 00194 sf->holdlen = remain; 00195 } 00196 ast_frfree(frame_ptr); 00197 } else { 00198 break; 00199 } 00200 } 00201 00202 sf->size -= sofar; 00203 return sofar; 00204 }