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00029 #include <unistd.h>
00030 #include <netinet/in.h>
00031 #include <arpa/inet.h>
00032 #include <stdlib.h>
00033 #include <sys/time.h>
00034 #include <stdio.h>
00035 #include <errno.h>
00036 #include <string.h>
00037
00038 #include "asterisk.h"
00039
00040 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 7221 $")
00041
00042 #include "asterisk/lock.h"
00043 #include "asterisk/channel.h"
00044 #include "asterisk/file.h"
00045 #include "asterisk/logger.h"
00046 #include "asterisk/sched.h"
00047 #include "asterisk/module.h"
00048 #include "asterisk/endian.h"
00049
00050
00051
00052
00053
00054 struct ast_filestream {
00055 void *reserved[AST_RESERVED_POINTERS];
00056
00057
00058
00059 FILE *f;
00060 struct ast_frame fr;
00061 char waste[AST_FRIENDLY_OFFSET];
00062 char empty;
00063 unsigned char g729[20];
00064 };
00065
00066
00067 AST_MUTEX_DEFINE_STATIC(g729_lock);
00068 static int glistcnt = 0;
00069
00070 static char *name = "g729";
00071 static char *desc = "Raw G729 data";
00072 static char *exts = "g729";
00073
00074 static struct ast_filestream *g729_open(FILE *f)
00075 {
00076
00077
00078
00079 struct ast_filestream *tmp;
00080 if ((tmp = malloc(sizeof(struct ast_filestream)))) {
00081 memset(tmp, 0, sizeof(struct ast_filestream));
00082 if (ast_mutex_lock(&g729_lock)) {
00083 ast_log(LOG_WARNING, "Unable to lock g729 list\n");
00084 free(tmp);
00085 return NULL;
00086 }
00087 tmp->f = f;
00088 tmp->fr.data = tmp->g729;
00089 tmp->fr.frametype = AST_FRAME_VOICE;
00090 tmp->fr.subclass = AST_FORMAT_G729A;
00091
00092 tmp->fr.src = name;
00093 tmp->fr.mallocd = 0;
00094 glistcnt++;
00095 ast_mutex_unlock(&g729_lock);
00096 ast_update_use_count();
00097 }
00098 return tmp;
00099 }
00100
00101 static struct ast_filestream *g729_rewrite(FILE *f, const char *comment)
00102 {
00103
00104
00105
00106 struct ast_filestream *tmp;
00107 if ((tmp = malloc(sizeof(struct ast_filestream)))) {
00108 memset(tmp, 0, sizeof(struct ast_filestream));
00109 if (ast_mutex_lock(&g729_lock)) {
00110 ast_log(LOG_WARNING, "Unable to lock g729 list\n");
00111 free(tmp);
00112 return NULL;
00113 }
00114 tmp->f = f;
00115 glistcnt++;
00116 ast_mutex_unlock(&g729_lock);
00117 ast_update_use_count();
00118 } else
00119 ast_log(LOG_WARNING, "Out of memory\n");
00120 return tmp;
00121 }
00122
00123 static void g729_close(struct ast_filestream *s)
00124 {
00125 if (ast_mutex_lock(&g729_lock)) {
00126 ast_log(LOG_WARNING, "Unable to lock g729 list\n");
00127 return;
00128 }
00129 glistcnt--;
00130 ast_mutex_unlock(&g729_lock);
00131 ast_update_use_count();
00132 fclose(s->f);
00133 free(s);
00134 s = NULL;
00135 }
00136
00137 static struct ast_frame *g729_read(struct ast_filestream *s, int *whennext)
00138 {
00139 int res;
00140
00141 s->fr.frametype = AST_FRAME_VOICE;
00142 s->fr.subclass = AST_FORMAT_G729A;
00143 s->fr.offset = AST_FRIENDLY_OFFSET;
00144 s->fr.samples = 160;
00145 s->fr.datalen = 20;
00146 s->fr.mallocd = 0;
00147 s->fr.data = s->g729;
00148 if ((res = fread(s->g729, 1, 20, s->f)) != 20) {
00149 if (res && (res != 10))
00150 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
00151 return NULL;
00152 }
00153 *whennext = s->fr.samples;
00154 return &s->fr;
00155 }
00156
00157 static int g729_write(struct ast_filestream *fs, struct ast_frame *f)
00158 {
00159 int res;
00160 if (f->frametype != AST_FRAME_VOICE) {
00161 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
00162 return -1;
00163 }
00164 if (f->subclass != AST_FORMAT_G729A) {
00165 ast_log(LOG_WARNING, "Asked to write non-G729 frame (%d)!\n", f->subclass);
00166 return -1;
00167 }
00168 if (f->datalen % 10) {
00169 ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 10\n", f->datalen);
00170 return -1;
00171 }
00172 if ((res = fwrite(f->data, 1, f->datalen, fs->f)) != f->datalen) {
00173 ast_log(LOG_WARNING, "Bad write (%d/10): %s\n", res, strerror(errno));
00174 return -1;
00175 }
00176 return 0;
00177 }
00178
00179 static char *g729_getcomment(struct ast_filestream *s)
00180 {
00181 return NULL;
00182 }
00183
00184 static int g729_seek(struct ast_filestream *fs, long sample_offset, int whence)
00185 {
00186 long bytes;
00187 off_t min,cur,max,offset=0;
00188 min = 0;
00189 cur = ftell(fs->f);
00190 fseek(fs->f, 0, SEEK_END);
00191 max = ftell(fs->f);
00192
00193 bytes = 20 * (sample_offset / 160);
00194 if (whence == SEEK_SET)
00195 offset = bytes;
00196 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
00197 offset = cur + bytes;
00198 else if (whence == SEEK_END)
00199 offset = max - bytes;
00200 if (whence != SEEK_FORCECUR) {
00201 offset = (offset > max)?max:offset;
00202 }
00203
00204 offset = (offset < min)?min:offset;
00205 if (fseek(fs->f, offset, SEEK_SET) < 0)
00206 return -1;
00207 return 0;
00208 }
00209
00210 static int g729_trunc(struct ast_filestream *fs)
00211 {
00212
00213 if (ftruncate(fileno(fs->f), ftell(fs->f)) < 0)
00214 return -1;
00215 return 0;
00216 }
00217
00218 static long g729_tell(struct ast_filestream *fs)
00219 {
00220 off_t offset;
00221 offset = ftell(fs->f);
00222 return (offset/20)*160;
00223 }
00224
00225 int load_module()
00226 {
00227 return ast_format_register(name, exts, AST_FORMAT_G729A,
00228 g729_open,
00229 g729_rewrite,
00230 g729_write,
00231 g729_seek,
00232 g729_trunc,
00233 g729_tell,
00234 g729_read,
00235 g729_close,
00236 g729_getcomment);
00237
00238
00239 }
00240
00241 int unload_module()
00242 {
00243 return ast_format_unregister(name);
00244 }
00245
00246 int usecount()
00247 {
00248 return glistcnt;
00249 }
00250
00251 char *description()
00252 {
00253 return desc;
00254 }
00255
00256
00257 char *key()
00258 {
00259 return ASTERISK_GPL_KEY;
00260 }