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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 171624 $")
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;
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 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 }
00137
00138
00139
00140
00141
00142
00143
00144
00145
00146
00147 int ast_slinfactory_read(struct ast_slinfactory *sf, short *buf, size_t samples)
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 }
00200
00201
00202
00203
00204
00205
00206
00207
00208 unsigned int ast_slinfactory_available(const struct ast_slinfactory *sf)
00209 {
00210 return sf->size;
00211 }
00212
00213
00214
00215
00216
00217
00218
00219
00220 void ast_slinfactory_flush(struct ast_slinfactory *sf)
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 }