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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 208 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().
00209 { 00210 return sf->size; 00211 }
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, ast_frame::frame_list, 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_getformatname(), AST_LIST_INSERT_TAIL, AST_LIST_TRAVERSE, ast_log(), ast_translate(), ast_translator_build_path(), ast_translator_free_path(), f, ast_slinfactory::format, ast_frame::frame_list, LOG_WARNING, 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; 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 duped_frame = ast_frdup(begin_frame); 00113 00114 ast_frfree(begin_frame); 00115 00116 if (!duped_frame) 00117 return 0; 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 x = 0; 00128 AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list) 00129 x++; 00130 00131 AST_LIST_INSERT_TAIL(&sf->queue, duped_frame, frame_list); 00132 00133 sf->size += duped_frame->samples; 00134 00135 return x; 00136 }
void ast_slinfactory_flush | ( | struct ast_slinfactory * | sf | ) |
Flush the contents of an slinfactory.
Definition at line 220 of file slinfactory.c.
References ast_frfree, AST_LIST_REMOVE_HEAD, ast_translator_free_path(), ast_frame::frame_list, ast_slinfactory::hold, ast_slinfactory::holdlen, ast_slinfactory::offset, ast_slinfactory::size, and ast_slinfactory::trans.
Referenced by ast_audiohook_write_frame().
00221 { 00222 struct ast_frame *fr = NULL; 00223 00224 if (sf->trans) { 00225 ast_translator_free_path(sf->trans); 00226 sf->trans = NULL; 00227 } 00228 00229 while ((fr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) 00230 ast_frfree(fr); 00231 00232 sf->size = sf->holdlen = 0; 00233 sf->offset = sf->hold; 00234 00235 return; 00236 }
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 147 of file slinfactory.c.
References ast_frfree, AST_LIST_REMOVE_HEAD, AST_SLINFACTORY_MAX_HOLD, ast_frame::data, ast_frame::frame_list, 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().
00148 { 00149 struct ast_frame *frame_ptr; 00150 unsigned int sofar = 0, ineed, remain; 00151 short *frame_data, *offset = buf; 00152 00153 while (sofar < samples) { 00154 ineed = samples - sofar; 00155 00156 if (sf->holdlen) { 00157 if (sf->holdlen <= ineed) { 00158 memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset)); 00159 sofar += sf->holdlen; 00160 offset += sf->holdlen; 00161 sf->holdlen = 0; 00162 sf->offset = sf->hold; 00163 } else { 00164 remain = sf->holdlen - ineed; 00165 memcpy(offset, sf->offset, ineed * sizeof(*offset)); 00166 sofar += ineed; 00167 sf->offset += ineed; 00168 sf->holdlen = remain; 00169 } 00170 continue; 00171 } 00172 00173 if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) { 00174 frame_data = frame_ptr->data.ptr; 00175 00176 if (frame_ptr->samples <= ineed) { 00177 memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset)); 00178 sofar += frame_ptr->samples; 00179 offset += frame_ptr->samples; 00180 } else { 00181 remain = frame_ptr->samples - ineed; 00182 memcpy(offset, frame_data, ineed * sizeof(*offset)); 00183 sofar += ineed; 00184 frame_data += ineed; 00185 if (remain > (AST_SLINFACTORY_MAX_HOLD - sf->holdlen)) { 00186 remain = AST_SLINFACTORY_MAX_HOLD - sf->holdlen; 00187 } 00188 memcpy(sf->hold, frame_data, remain * sizeof(*offset)); 00189 sf->holdlen = remain; 00190 } 00191 ast_frfree(frame_ptr); 00192 } else { 00193 break; 00194 } 00195 } 00196 00197 sf->size -= sofar; 00198 return sofar; 00199 }