int krad_opus_decoder_read (krad_opus_t *krad_opus, int channel, char *buffer, int buffer_length) {
int resample_process_size = 512;
krad_opus->ret = krad_ringbuffer_peek (krad_opus->resampled_ringbuf[channel - 1], (char *)buffer, buffer_length );
if (krad_opus->ret >= buffer_length) {
krad_ringbuffer_read_advance (krad_opus->resampled_ringbuf[channel - 1], buffer_length );
return krad_opus->ret;
} else {
while (krad_ringbuffer_read_space (krad_opus->resampled_ringbuf[channel - 1]) < buffer_length) {
if (krad_ringbuffer_read_space (krad_opus->ringbuf[channel - 1]) >= resample_process_size * 4 ) {
krad_opus->ret = krad_ringbuffer_peek (krad_opus->ringbuf[channel - 1],
(char *)krad_opus->read_samples[channel - 1],
(resample_process_size * 4) );
krad_opus->src_data[channel - 1].data_in = krad_opus->read_samples[channel - 1];
krad_opus->src_data[channel - 1].input_frames = resample_process_size;
krad_opus->src_data[channel - 1].data_out = krad_opus->resampled_samples[channel - 1];
krad_opus->src_data[channel - 1].output_frames = 2048;
krad_opus->src_error[channel - 1] = src_process (krad_opus->src_resampler[channel - 1],
&krad_opus->src_data[channel - 1]);
if (krad_opus->src_error[channel - 1] != 0) {
failfast ("krad_opus_read_audio src resampler error: %s\n",
src_strerror(krad_opus->src_error[channel - 1]));
}
krad_ringbuffer_read_advance (krad_opus->ringbuf[channel - 1],
(krad_opus->src_data[channel - 1].input_frames_used * 4) );
krad_opus->ret = krad_ringbuffer_write (krad_opus->resampled_ringbuf[channel - 1],
(char *)krad_opus->resampled_samples[channel - 1],
(krad_opus->src_data[channel - 1].output_frames_gen * 4) );
if (krad_ringbuffer_read_space (krad_opus->resampled_ringbuf[channel - 1]) >= buffer_length ) {
return krad_ringbuffer_read (krad_opus->resampled_ringbuf[channel - 1], buffer, buffer_length );
}
} else {
return 0;
}
}
}
return 0;
}
static void *krad_transmitter_transmission_thread (void *arg) {
krad_transmission_t *krad_transmission = (krad_transmission_t *)arg;
krad_system_set_thread_name ("kr_tx_txmtr");
int r;
int e;
int ret;
int wait_time;
uint64_t last_position;
uint32_t new_bytes_avail;
uint32_t space_avail;
uint32_t drop_count;
krad_transmission_receiver_t *krad_transmission_receiver;
r = 0;
e = 0;
ret = 0;
wait_time = 2;
last_position = 0;
new_bytes_avail = 0;
space_avail = 0;
drop_count = 0;
krad_transmission_receiver = NULL;
printk ("Krad Transmitter: transmission thread starting for %s", krad_transmission->sysname);
while (krad_transmission->active == 1) {
if (krad_transmission->new_data == 1) {
if (krad_transmission->new_sync_point == 1) {
krad_transmission->sync_point = krad_transmission->position;
krad_transmission->new_sync_point = 0;
}
space_avail = krad_ringbuffer_write_space (krad_transmission->transmission_ringbuffer);
new_bytes_avail = krad_ringbuffer_read_space (krad_transmission->ringbuffer);
if (space_avail < new_bytes_avail) {
drop_count = new_bytes_avail - space_avail;
krad_ringbuffer_read_advance (krad_transmission->transmission_ringbuffer, drop_count);
}
krad_ringbuffer_read (krad_transmission->ringbuffer,
(char *)krad_transmission->transmission_buffer,
new_bytes_avail);
krad_ringbuffer_write (krad_transmission->transmission_ringbuffer,
(char *)krad_transmission->transmission_buffer,
new_bytes_avail);
krad_transmission->position += new_bytes_avail;
if (krad_transmission->position > DEFAULT_RING_SIZE) {
krad_transmission->horizon = krad_transmission->position - DEFAULT_RING_SIZE;
}
krad_ringbuffer_get_read_vector (krad_transmission->transmission_ringbuffer,
&krad_transmission->tx_vec[0]);
krad_transmission->new_data = 0;
}
ret = epoll_wait (krad_transmission->connections_efd, krad_transmission->transmission_events,
KRAD_TRANSMITTER_MAXEVENTS, wait_time);
if (ret < 0) {
if ((ret < 0) && (errno == EINTR)) {
continue;
}
printke ("Krad Transmitter: Failed on epoll wait %s", strerror(errno));
krad_transmission->active = 2;
break;
}
if (ret > 0) {
for (e = 0; e < ret; e++) {
krad_transmission_receiver =
(krad_transmission_receiver_t *)krad_transmission->transmission_events[e].data.ptr;
if (krad_transmission_receiver->noob == 1) {
krad_transmission_receiver->noob = 0;
krad_transmission->receivers++;
}
if ((krad_transmission->transmission_events[e].events & EPOLLERR) ||
(krad_transmission->transmission_events[e].events & EPOLLHUP) ||
(krad_transmission->transmission_events[e].events & EPOLLHUP)) {
if (krad_transmission->transmission_events[e].events & EPOLLHUP) {
printke ("Krad Transmitter: transmitter transmission receiver connection hangup");
}
if (krad_transmission->transmission_events[e].events & EPOLLERR) {
printke ("Krad Transmitter: transmitter transmission receiver connection error");
}
if (krad_transmission->transmission_events[e].events & EPOLLHUP) {
printk ("Krad Transmitter: client disconnected %d", krad_transmission_receiver->fd);
}
krad_transmitter_receiver_destroy (krad_transmission_receiver);
continue;
}
if (krad_transmission->transmission_events[e].events & EPOLLOUT) {
krad_transmitter_transmission_transmit (krad_transmission, krad_transmission_receiver);
}
}
}
if ((last_position != krad_transmission->position) && (krad_transmission->ready_receiver_count > 0)) {
last_position = krad_transmission->position;
for (r = 0; r < TOTAL_RECEIVERS; r++) {
if ((krad_transmission->krad_transmitter->krad_transmission_receivers[r].krad_transmission == krad_transmission) && (krad_transmission->krad_transmitter->krad_transmission_receivers[r].active == 1) && (krad_transmission->krad_transmitter->krad_transmission_receivers[r].ready == 1)) {
krad_transmission_receiver = &krad_transmission->krad_transmitter->krad_transmission_receivers[r];
krad_transmitter_transmission_transmit (krad_transmission, krad_transmission_receiver);
}
}
}
}
krad_transmission->active = 3;
printk ("Krad Transmitter: transmission thread exiting for %s", krad_transmission->sysname);
return NULL;
}
int krad_opus_encoder_read (krad_opus_t *krad_opus, unsigned char *buffer, int *nframes) {
int ready;
int bytes;
int resp;
int s, c;
while (krad_ringbuffer_read_space (krad_opus->ringbuf[krad_opus->channels - 1]) >= 512 * 4 ) {
for (c = 0; c < krad_opus->channels; c++) {
krad_opus->ret = krad_ringbuffer_peek (krad_opus->ringbuf[c], (char *)krad_opus->samples[c], (512 * 4) );
krad_opus->src_data[c].data_in = krad_opus->samples[c];
krad_opus->src_data[c].input_frames = 512;
krad_opus->src_data[c].data_out = krad_opus->resampled_samples[c];
krad_opus->src_data[c].output_frames = 2048;
krad_opus->src_error[c] = src_process (krad_opus->src_resampler[c], &krad_opus->src_data[c]);
if (krad_opus->src_error[c] != 0) {
failfast ("Krad Opus Encoder: src resampler error: %s\n", src_strerror(krad_opus->src_error[c]));
}
krad_ringbuffer_read_advance (krad_opus->ringbuf[c], (krad_opus->src_data[c].input_frames_used * 4) );
krad_opus->ret = krad_ringbuffer_write (krad_opus->resampled_ringbuf[c],
(char *)krad_opus->resampled_samples[c],
(krad_opus->src_data[c].output_frames_gen * 4) );
}
}
if (krad_opus->new_bitrate != krad_opus->bitrate) {
krad_opus->bitrate = krad_opus->new_bitrate;
resp = opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_SET_BITRATE(krad_opus->bitrate));
if (resp != OPUS_OK) {
failfast ("Krad Opus Encoder: bitrate request failed %s\n", opus_strerror (resp));
} else {
printk ("Krad Opus Encoder: set opus bitrate %d\n", krad_opus->bitrate);
}
}
if (krad_opus->new_frame_size != krad_opus->frame_size) {
krad_opus->frame_size = krad_opus->new_frame_size;
printk ("Krad Opus Encoder: frame size is now %d\n", krad_opus->frame_size);
}
if (krad_opus->new_complexity != krad_opus->complexity) {
krad_opus->complexity = krad_opus->new_complexity;
resp = opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_SET_COMPLEXITY(krad_opus->complexity));
if (resp != OPUS_OK) {
failfast ("Krad Opus Encoder: complexity request failed %s. \n", opus_strerror(resp));
} else {
printk ("Krad Opus Encoder: set opus complexity %d\n", krad_opus->complexity);
}
}
if (krad_opus->new_signal != krad_opus->signal) {
krad_opus->signal = krad_opus->new_signal;
resp = opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_SET_SIGNAL(krad_opus->signal));
if (resp != OPUS_OK) {
failfast ("Krad Opus Encoder: signal request failed %s\n", opus_strerror(resp));
} else {
printk ("Krad Opus Encoder: set opus signal mode %d\n", krad_opus->signal);
}
}
if (krad_opus->new_bandwidth != krad_opus->bandwidth) {
krad_opus->bandwidth = krad_opus->new_bandwidth;
resp = opus_multistream_encoder_ctl (krad_opus->encoder, OPUS_SET_BANDWIDTH(krad_opus->bandwidth));
if (resp != OPUS_OK) {
failfast ("Krad Opus Encoder: bandwidth request failed %s\n", opus_strerror(resp));
} else {
printk ("Krad Opus Encoder: Set Opus bandwidth mode %d\n", krad_opus->bandwidth);
}
}
ready = 1;
for (c = 0; c < krad_opus->channels; c++) {
if (krad_ringbuffer_read_space (krad_opus->resampled_ringbuf[c]) < krad_opus->frame_size * 4) {
ready = 0;
}
}
if (ready == 1) {
for (c = 0; c < krad_opus->channels; c++) {
krad_opus->ret = krad_ringbuffer_read (krad_opus->resampled_ringbuf[c],
(char *)krad_opus->resampled_samples[c],
(krad_opus->frame_size * 4) );
}
for (s = 0; s < krad_opus->frame_size; s++) {
for (c = 0; c < krad_opus->channels; c++) {
krad_opus->interleaved_resampled_samples[s * krad_opus->channels + c] = krad_opus->resampled_samples[c][s];
}
}
bytes = opus_multistream_encode_float (krad_opus->encoder,
krad_opus->interleaved_resampled_samples,
krad_opus->frame_size,
buffer,
krad_opus->frame_size * 2);
if (bytes < 0) {
failfast ("Krad Opus Encoding failed: %s.", opus_strerror (bytes));
}
*nframes = krad_opus->frame_size;
return bytes;
}
return 0;
}