static int load_module(void *mod)
{
int index;
/* XXX better init ? */
for (index = 0; index < (sizeof(ulaw_silence) / sizeof(ulaw_silence[0])); index++)
ulaw_silence[index] = AST_LIN2MU(0);
for (index = 0; index < (sizeof(alaw_silence) / sizeof(alaw_silence[0])); index++)
alaw_silence[index] = AST_LIN2A(0);
return ast_format_register(&pcm_f) || ast_format_register(&alaw_f)
|| ast_format_register(&au_f);
}
/*! \brief convert and store samples in outbuf */
static int lintoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
int i = f->samples;
char *dst = pvt->outbuf.c + pvt->samples;
int16_t *src = f->data.ptr;
pvt->samples += i;
pvt->datalen += i; /* 1 byte/sample */
while (i--)
*dst++ = AST_LIN2MU(*src++);
return 0;
}
static void make_tone_burst(unsigned char *data, float freq, float loudness, int len, int *x)
{
int i;
float val;
for(i = 0; i < len; i++){
val = loudness * sin((freq * 2.0 * M_PI * (*x)++)/8000.0);
data[i] = AST_LIN2MU((int)val);
}
/* wrap back around from 8000 */
if (*x >= 8000) *x = 0;
return;
}
static int i4l_write(struct ast_modem_pvt *p, struct ast_frame *f)
{
#define MAX_WRITE_SIZE 2048
unsigned char result[MAX_WRITE_SIZE << 1];
unsigned char b;
int bpos=0, x;
int res;
if (f->datalen > MAX_WRITE_SIZE) {
ast_log(LOG_WARNING, "Discarding too big frame of size %d\n", f->datalen);
return -1;
}
if (f->frametype != AST_FRAME_VOICE) {
ast_log(LOG_WARNING, "Don't know how to handle %d type frames\n", f->frametype);
return -1;
}
if (f->subclass != AST_FORMAT_SLINEAR) {
ast_log(LOG_WARNING, "Don't know how to handle anything but signed linear frames\n");
return -1;
}
for (x=0; x<f->datalen/2; x++) {
b = AST_LIN2MU(((short *)f->data)[x]);
result[bpos++] = b;
if (b == CHAR_DLE)
result[bpos++]=b;
}
#if 0
res = fwrite(result, bpos, 1, p->f);
res *= bpos;
#else
res = write(p->fd, result, bpos);
#endif
if (res < 1) {
if (errno != EAGAIN) {
ast_log(LOG_WARNING, "Failed to write buffer\n");
return -1;
}
}
#if 0
printf("Result of write is %d\n", res);
#endif
return 0;
}
static int load_module(void)
{
int res;
int x;
for (x=0;x<256;x++) {
mu2a[x] = AST_LIN2A(AST_MULAW(x));
a2mu[x] = AST_LIN2MU(AST_ALAW(x));
}
res = ast_register_translator(&alawtoulaw);
res |= ast_register_translator(&ulawtoalaw);
if (res) {
unload_module();
return AST_MODULE_LOAD_FAILURE;
}
return AST_MODULE_LOAD_SUCCESS;
}
static int load_module(void)
{
int i;
/* XXX better init ? */
for (i = 0; i < ARRAY_LEN(ulaw_silence); i++)
ulaw_silence[i] = AST_LIN2MU(0);
for (i = 0; i < ARRAY_LEN(alaw_silence); i++)
alaw_silence[i] = AST_LIN2A(0);
ast_format_set(&pcm_f.format, AST_FORMAT_ULAW, 0);
ast_format_set(&alaw_f.format, AST_FORMAT_ALAW, 0);
ast_format_set(&au_f.format, AST_FORMAT_ULAW, 0);
ast_format_set(&g722_f.format, AST_FORMAT_G722, 0);
if ( ast_format_def_register(&pcm_f)
|| ast_format_def_register(&alaw_f)
|| ast_format_def_register(&au_f)
|| ast_format_def_register(&g722_f) )
return AST_MODULE_LOAD_FAILURE;
return AST_MODULE_LOAD_SUCCESS;
}
static int load_module(void)
{
int res;
int x;
ast_format_set(&alawtoulaw.src_format, AST_FORMAT_ALAW, 0);
ast_format_set(&alawtoulaw.dst_format, AST_FORMAT_ULAW, 0);
ast_format_set(&ulawtoalaw.src_format, AST_FORMAT_ULAW, 0);
ast_format_set(&ulawtoalaw.dst_format, AST_FORMAT_ALAW, 0);
for (x=0;x<256;x++) {
mu2a[x] = AST_LIN2A(AST_MULAW(x));
a2mu[x] = AST_LIN2MU(AST_ALAW(x));
}
res = ast_register_translator(&alawtoulaw);
if (!res)
res = ast_register_translator(&ulawtoalaw);
else
ast_unregister_translator(&alawtoulaw);
if (res)
return AST_MODULE_LOAD_FAILURE;
return AST_MODULE_LOAD_SUCCESS;
}