main(int argc, char* argv[])
{
if (argc != 4)
{
fprintf(stderr, "\nUsage: itu_encoder -[a|u] <PCM-File> <ADPCM-File>");
exit(-1);
}
I_file = argv[2];
O_file = argv[3];
put_sample(1);
reset_encoder();
LAW = argv[1][1] == 'u' ? u_LAW : A_LAW;
ExitFlag = FALSE;
while (!ExitFlag)
{
get_sample();
if (ExitFlag)
break;
O = encoder(I);
put_sample(2);
}
put_sample(3);
return (0);
}
/**
* Used to process a data frame that has just been uploaded.
*/
void block_uploaded(struct rx_frame* rx) {
uint32_t mem_addr;
uint32_t checksum, actual_checksum;
if (rx->length >= MEMORY_RECORD_SIZE) {
/* Copy the record from the radio packet. Skip the header and memory address */
memcpy(record, rx->data+5, MEMORY_RECORD_SIZE);
/* Calculate the checksum */
actual_checksum = calculate_checksum(record);
/* Read the checksum */
checksum = get_checksum(record);
if (checksum == actual_checksum) {
/* Extract the memory address */
mem_addr = get_memory_address_from_rx(rx);
/* Acknowledge the frame */
send_upload_ack(rx->source_address, mem_addr, checksum);
/* Write the record out to memory */
put_sample(record);
console_puts("Radio Upload Frame OK\n");
} else {
console_puts("Radio Upload Frame Checksum Error!\n");
console_printf("Frame: %04x\nCalc: %04x\n", checksum, actual_checksum);
}
} else {
console_puts("Radio Upload Frame too short!\n");
}
}
static PyObject*
Sine_Stereo_read(decoders_Sine_Stereo* self, PyObject* args) {
pcm_FrameList *framelist;
int requested_frames;
int frames_to_read;
int i;
double d;
int ia;
int *samples;
if (self->closed) {
PyErr_SetString(PyExc_ValueError, "cannot read closed stream");
return NULL;
}
if (!PyArg_ParseTuple(args, "i", &requested_frames))
return NULL;
frames_to_read = MIN(MAX(requested_frames, 1), self->remaining_pcm_frames);
framelist = new_FrameList(self->audiotools_pcm,
2,
self->bits_per_sample,
frames_to_read);
samples = framelist->samples;
for (i = 0; i < frames_to_read; i++) {
d = ((self->a1 * sin(self->theta1)) +
(self->a2 * sin(self->theta2))) * (double)(self->full_scale);
ia = (int)(d + 0.5);
put_sample(samples, 0, 2, i, ia);
d = -((self->a1 * sin(self->theta1 * self->fmult)) +
(self->a2 * sin(self->theta2 * self->fmult))) *
(double)(self->full_scale);
ia = (int)(d + 0.5);
put_sample(samples, 1, 2, i, ia);
self->theta1 += self->delta1;
self->theta2 += self->delta2;
}
self->remaining_pcm_frames -= frames_to_read;
return (PyObject*)framelist;
}
