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00027 #include "asterisk.h"
00028
00029 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 171621 $")
00030
00031 #include <string.h>
00032
00033 #include "asterisk/frame.h"
00034 #include "asterisk/slinfactory.h"
00035 #include "asterisk/logger.h"
00036 #include "asterisk/translate.h"
00037
00038 void ast_slinfactory_init(struct ast_slinfactory *sf)
00039 {
00040 memset(sf, 0, sizeof(*sf));
00041 sf->offset = sf->hold;
00042 }
00043
00044 void ast_slinfactory_destroy(struct ast_slinfactory *sf)
00045 {
00046 struct ast_frame *f;
00047
00048 if (sf->trans) {
00049 ast_translator_free_path(sf->trans);
00050 sf->trans = NULL;
00051 }
00052
00053 while ((f = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list)))
00054 ast_frfree(f);
00055 }
00056
00057 int ast_slinfactory_feed(struct ast_slinfactory *sf, struct ast_frame *f)
00058 {
00059 struct ast_frame *begin_frame = f, *duped_frame = NULL, *frame_ptr;
00060 unsigned int x;
00061
00062
00063
00064
00065
00066
00067
00068 if (!f->data) {
00069 return 0;
00070 }
00071
00072 if (f->subclass != AST_FORMAT_SLINEAR) {
00073 if (sf->trans && f->subclass != sf->format) {
00074 ast_translator_free_path(sf->trans);
00075 sf->trans = NULL;
00076 }
00077
00078 if (!sf->trans) {
00079 if ((sf->trans = ast_translator_build_path(AST_FORMAT_SLINEAR, f->subclass)) == NULL) {
00080 ast_log(LOG_WARNING, "Cannot build a path from %s to slin\n", ast_getformatname(f->subclass));
00081 return 0;
00082 } else {
00083 sf->format = f->subclass;
00084 }
00085 }
00086
00087 if (!(begin_frame = ast_translate(sf->trans, f, 0)))
00088 return 0;
00089
00090 duped_frame = ast_frdup(begin_frame);
00091
00092 ast_frfree(begin_frame);
00093
00094 if (!duped_frame)
00095 return 0;
00096 } else {
00097 if (!(duped_frame = ast_frdup(f)))
00098 return 0;
00099 }
00100
00101 x = 0;
00102 AST_LIST_TRAVERSE(&sf->queue, frame_ptr, frame_list)
00103 x++;
00104
00105 AST_LIST_INSERT_TAIL(&sf->queue, duped_frame, frame_list);
00106
00107 sf->size += duped_frame->samples;
00108
00109 return x;
00110 }
00111
00112 int ast_slinfactory_read(struct ast_slinfactory *sf, short *buf, size_t samples)
00113 {
00114 struct ast_frame *frame_ptr;
00115 unsigned int sofar = 0, ineed, remain;
00116 short *frame_data, *offset = buf;
00117
00118 while (sofar < samples) {
00119 ineed = samples - sofar;
00120
00121 if (sf->holdlen) {
00122 if (sf->holdlen <= ineed) {
00123 memcpy(offset, sf->hold, sf->holdlen * sizeof(*offset));
00124 sofar += sf->holdlen;
00125 offset += sf->holdlen;
00126 sf->holdlen = 0;
00127 sf->offset = sf->hold;
00128 } else {
00129 remain = sf->holdlen - ineed;
00130 memcpy(offset, sf->offset, ineed * sizeof(*offset));
00131 sofar += ineed;
00132 sf->offset += ineed;
00133 sf->holdlen = remain;
00134 }
00135 continue;
00136 }
00137
00138 if ((frame_ptr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list))) {
00139 frame_data = frame_ptr->data;
00140
00141 if (frame_ptr->samples <= ineed) {
00142 memcpy(offset, frame_data, frame_ptr->samples * sizeof(*offset));
00143 sofar += frame_ptr->samples;
00144 offset += frame_ptr->samples;
00145 } else {
00146 remain = frame_ptr->samples - ineed;
00147 memcpy(offset, frame_data, ineed * sizeof(*offset));
00148 sofar += ineed;
00149 frame_data += ineed;
00150 if (remain > (AST_SLINFACTORY_MAX_HOLD - sf->holdlen)) {
00151 remain = AST_SLINFACTORY_MAX_HOLD - sf->holdlen;
00152 }
00153 memcpy(sf->hold, frame_data, remain * sizeof(*offset));
00154 sf->holdlen = remain;
00155 }
00156 ast_frfree(frame_ptr);
00157 } else {
00158 break;
00159 }
00160 }
00161
00162 sf->size -= sofar;
00163 return sofar;
00164 }
00165
00166 unsigned int ast_slinfactory_available(const struct ast_slinfactory *sf)
00167 {
00168 return sf->size;
00169 }
00170
00171 void ast_slinfactory_flush(struct ast_slinfactory *sf)
00172 {
00173 struct ast_frame *fr = NULL;
00174
00175 if (sf->trans) {
00176 ast_translator_free_path(sf->trans);
00177 sf->trans = NULL;
00178 }
00179
00180 while ((fr = AST_LIST_REMOVE_HEAD(&sf->queue, frame_list)))
00181 ast_frfree(fr);
00182
00183 sf->size = sf->holdlen = 0;
00184 sf->offset = sf->hold;
00185
00186 return;
00187 }