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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 233782 $")
00031
00032 #include <unistd.h>
00033 #include <netinet/in.h>
00034 #include <arpa/inet.h>
00035 #include <stdlib.h>
00036 #include <stdio.h>
00037 #include <errno.h>
00038 #include <string.h>
00039 #include <sys/time.h>
00040
00041 #include "asterisk/lock.h"
00042 #include "asterisk/channel.h"
00043 #include "asterisk/file.h"
00044 #include "asterisk/logger.h"
00045 #include "asterisk/sched.h"
00046 #include "asterisk/module.h"
00047
00048 #define G723_MAX_SIZE 1024
00049
00050 static struct ast_frame *g723_read(struct ast_filestream *s, int *whennext)
00051 {
00052 unsigned short size;
00053 int res;
00054 int delay;
00055
00056
00057 if (fread(&delay, 1, 4, s->f) == 4)
00058 delay = ntohl(delay);
00059 else
00060 delay = -1;
00061 if (fread(&size, 1, 2, s->f) != 2) {
00062
00063
00064 return NULL;
00065 }
00066
00067 size = ntohs(size);
00068 if (size > G723_MAX_SIZE) {
00069 ast_log(LOG_WARNING, "Size %d is invalid\n", size);
00070
00071
00072
00073 return NULL;
00074 }
00075
00076 s->fr.frametype = AST_FRAME_VOICE;
00077 s->fr.subclass = AST_FORMAT_G723_1;
00078 s->fr.mallocd = 0;
00079 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, size);
00080 if ((res = fread(s->fr.data, 1, s->fr.datalen, s->f)) != size) {
00081 ast_log(LOG_WARNING, "Short read (%d of %d bytes) (%s)!\n", res, size, strerror(errno));
00082 return NULL;
00083 }
00084 *whennext = s->fr.samples = 240;
00085 return &s->fr;
00086 }
00087
00088 static int g723_write(struct ast_filestream *s, struct ast_frame *f)
00089 {
00090 uint32_t delay;
00091 uint16_t size;
00092 int res;
00093
00094 if (f->frametype != AST_FRAME_VOICE) {
00095 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
00096 return -1;
00097 }
00098 if (f->subclass != AST_FORMAT_G723_1) {
00099 ast_log(LOG_WARNING, "Asked to write non-g723 frame!\n");
00100 return -1;
00101 }
00102 delay = 0;
00103 if (f->datalen <= 0) {
00104 ast_log(LOG_WARNING, "Short frame ignored (%d bytes long?)\n", f->datalen);
00105 return 0;
00106 }
00107 if ((res = fwrite(&delay, 1, 4, s->f)) != 4) {
00108 ast_log(LOG_WARNING, "Unable to write delay: res=%d (%s)\n", res, strerror(errno));
00109 return -1;
00110 }
00111 size = htons(f->datalen);
00112 if ((res = fwrite(&size, 1, 2, s->f)) != 2) {
00113 ast_log(LOG_WARNING, "Unable to write size: res=%d (%s)\n", res, strerror(errno));
00114 return -1;
00115 }
00116 if ((res = fwrite(f->data, 1, f->datalen, s->f)) != f->datalen) {
00117 ast_log(LOG_WARNING, "Unable to write frame: res=%d (%s)\n", res, strerror(errno));
00118 return -1;
00119 }
00120 return 0;
00121 }
00122
00123 static int g723_seek(struct ast_filestream *fs, off_t sample_offset, int whence)
00124 {
00125 return -1;
00126 }
00127
00128 static int g723_trunc(struct ast_filestream *fs)
00129 {
00130
00131 if (ftruncate(fileno(fs->f), ftello(fs->f)) < 0)
00132 return -1;
00133 return 0;
00134 }
00135
00136 static off_t g723_tell(struct ast_filestream *fs)
00137 {
00138 return -1;
00139 }
00140
00141 static const struct ast_format g723_1_f = {
00142 .name = "g723sf",
00143 .exts = "g723|g723sf",
00144 .format = AST_FORMAT_G723_1,
00145 .write = g723_write,
00146 .seek = g723_seek,
00147 .trunc = g723_trunc,
00148 .tell = g723_tell,
00149 .read = g723_read,
00150 .buf_size = G723_MAX_SIZE + AST_FRIENDLY_OFFSET,
00151 };
00152
00153 static int load_module(void)
00154 {
00155 return ast_format_register(&g723_1_f);
00156 }
00157
00158 static int unload_module(void)
00159 {
00160 return ast_format_unregister(g723_1_f.name);
00161 }
00162
00163 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_FIRST, "G.723.1 Simple Timestamp File Format",
00164 .load = load_module,
00165 .unload = unload_module,
00166 );