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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 201096 $")
00030
00031 #include "asterisk/frame.h"
00032 #include "asterisk/slinfactory.h"
00033 #include "asterisk/translate.h"
00034
00035
00036
00037
00038
00039
00040
00041
00042 void ast_slinfactory_init(struct ast_slinfactory *sf)
00043 {
00044 memset(sf, 0, sizeof(*sf));
00045 sf->offset = sf->hold;
00046 }
00047
00048
00049
00050
00051
00052
00053
00054
00055
00056
00057
00058
00059 void ast_slinfactory_destroy(struct ast_slinfactory *sf)
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 }
00071
00072
00073
00074
00075
00076
00077
00078
00079
00080 int ast_slinfactory_feed(struct ast_slinfactory *sf, struct ast_frame *f)
00081 {
00082 struct ast_frame *begin_frame = f, *duped_frame = NULL, *frame_ptr;
00083 unsigned int x = 0;
00084
00085
00086
00087
00088
00089
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
00133
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 }
00142
00143
00144
00145
00146
00147
00148
00149
00150
00151
00152 int ast_slinfactory_read(struct ast_slinfactory *sf, short *buf, size_t samples)
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 }
00205
00206
00207
00208
00209
00210
00211
00212
00213 unsigned int ast_slinfactory_available(const struct ast_slinfactory *sf)
00214 {
00215 return sf->size;
00216 }
00217
00218
00219
00220
00221
00222
00223
00224
00225 void ast_slinfactory_flush(struct ast_slinfactory *sf)
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 }