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00030 #include "asterisk.h"
00031
00032 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 364578 $")
00033
00034 #include "asterisk/mod_format.h"
00035 #include "asterisk/module.h"
00036 #include "asterisk/endian.h"
00037
00038 #define BUF_SIZE 80
00039 #define SAMPLES_TO_BYTES(x) x / (320 / 80)
00040 #define BYTES_TO_SAMPLES(x) x * (320 / 80)
00041
00042 static struct ast_frame *siren7read(struct ast_filestream *s, int *whennext)
00043 {
00044 int res;
00045
00046
00047 s->fr.frametype = AST_FRAME_VOICE;
00048 s->fr.subclass.codec = AST_FORMAT_SIREN7;
00049 s->fr.mallocd = 0;
00050 AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, BUF_SIZE);
00051 if ((res = fread(s->fr.data.ptr, 1, s->fr.datalen, s->f)) != s->fr.datalen) {
00052 if (res)
00053 ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
00054 return NULL;
00055 }
00056 *whennext = s->fr.samples = BYTES_TO_SAMPLES(res);
00057 return &s->fr;
00058 }
00059
00060 static int siren7write(struct ast_filestream *fs, struct ast_frame *f)
00061 {
00062 int res;
00063
00064 if (f->frametype != AST_FRAME_VOICE) {
00065 ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
00066 return -1;
00067 }
00068 if (f->subclass.codec != AST_FORMAT_SIREN7) {
00069 ast_log(LOG_WARNING, "Asked to write non-Siren7 frame (%s)!\n", ast_getformatname(f->subclass.codec));
00070 return -1;
00071 }
00072 if ((res = fwrite(f->data.ptr, 1, f->datalen, fs->f)) != f->datalen) {
00073 ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
00074 return -1;
00075 }
00076 return 0;
00077 }
00078
00079 static int siren7seek(struct ast_filestream *fs, off_t sample_offset, int whence)
00080 {
00081 off_t offset = 0, min = 0, cur, max;
00082
00083 sample_offset = SAMPLES_TO_BYTES(sample_offset);
00084
00085 if ((cur = ftello(fs->f)) < 0) {
00086 ast_log(AST_LOG_WARNING, "Unable to determine current position in siren7 filestream %p: %s\n", fs, strerror(errno));
00087 return -1;
00088 }
00089
00090 if (fseeko(fs->f, 0, SEEK_END) < 0) {
00091 ast_log(AST_LOG_WARNING, "Unable to seek to end of siren7 filestream %p: %s\n", fs, strerror(errno));
00092 return -1;
00093 }
00094
00095 if ((max = ftello(fs->f)) < 0) {
00096 ast_log(AST_LOG_WARNING, "Unable to determine max position in siren7 filestream %p: %s\n", fs, strerror(errno));
00097 return -1;
00098 }
00099
00100 if (whence == SEEK_SET)
00101 offset = sample_offset;
00102 else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
00103 offset = sample_offset + cur;
00104 else if (whence == SEEK_END)
00105 offset = max - sample_offset;
00106
00107 if (whence != SEEK_FORCECUR)
00108 offset = (offset > max) ? max : offset;
00109
00110
00111 offset = (offset < min) ? min : offset;
00112
00113 return fseeko(fs->f, offset, SEEK_SET);
00114 }
00115
00116 static int siren7trunc(struct ast_filestream *fs)
00117 {
00118 int fd;
00119 off_t cur;
00120
00121 if ((fd = fileno(fs->f)) < 0) {
00122 ast_log(AST_LOG_WARNING, "Unable to determine file descriptor for siren7 filestream %p: %s\n", fs, strerror(errno));
00123 return -1;
00124 }
00125 if ((cur = ftello(fs->f)) < 0) {
00126 ast_log(AST_LOG_WARNING, "Unable to determine current position in siren7 filestream %p: %s\n", fs, strerror(errno));
00127 return -1;
00128 }
00129
00130 return ftruncate(fd, cur);
00131 }
00132
00133 static off_t siren7tell(struct ast_filestream *fs)
00134 {
00135 return BYTES_TO_SAMPLES(ftello(fs->f));
00136 }
00137
00138 static const struct ast_format siren7_f = {
00139 .name = "siren7",
00140 .exts = "siren7",
00141 .format = AST_FORMAT_SIREN7,
00142 .write = siren7write,
00143 .seek = siren7seek,
00144 .trunc = siren7trunc,
00145 .tell = siren7tell,
00146 .read = siren7read,
00147 .buf_size = BUF_SIZE + AST_FRIENDLY_OFFSET,
00148 };
00149
00150 static int load_module(void)
00151 {
00152 if (ast_format_register(&siren7_f))
00153 return AST_MODULE_LOAD_DECLINE;
00154
00155 return AST_MODULE_LOAD_SUCCESS;
00156 }
00157
00158 static int unload_module(void)
00159 {
00160 return ast_format_unregister(siren7_f.name);
00161 }
00162
00163 AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "ITU G.722.1 (Siren7, licensed from Polycom)",
00164 .load = load_module,
00165 .unload = unload_module,
00166 .load_pri = AST_MODPRI_APP_DEPEND
00167 );