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#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>
#include <opus.h>
#include "core.h"
#include "util.h"
ECPContext ctx_c;
ECPSocket sock_c;
ECPConnHandler handler_c;
ECPNode node;
ECPConnection conn;
int open_done = 0;
snd_pcm_t *handle_plb;
snd_pcm_t *handle_cpt;
OpusEncoder *opus_enc;
OpusDecoder *opus_dec;
// 2.5, 5, 10, 20, 40 or 60 ms
snd_pcm_uframes_t alsa_frames = 160;
unsigned char *alsa_out_buf = NULL;
unsigned char *alsa_in_buf = NULL;
#define CTYPE_TEST 0
#define MTYPE_MSG 8
int a_open(char *dev_name, snd_pcm_t **handle, snd_pcm_hw_params_t **hw_params, snd_pcm_stream_t stream, snd_pcm_format_t format, unsigned int *nchannels, unsigned int *sample_rate, snd_pcm_uframes_t *frames, size_t *buf_size) {
int bits, err = 0;
unsigned int fragments = 2;
unsigned int frame_size;
err = snd_pcm_open(handle, dev_name, stream, 0);
if (!err) err = snd_pcm_hw_params_malloc(hw_params);
if (!err) err = snd_pcm_hw_params_any(*handle, *hw_params);
if (!err) err = snd_pcm_hw_params_set_access(*handle, *hw_params, SND_PCM_ACCESS_RW_INTERLEAVED);
if (!err) err = snd_pcm_hw_params_set_format(*handle, *hw_params, format);
if (!err) err = snd_pcm_hw_params_set_rate_near(*handle, *hw_params, sample_rate, 0);
if (!err) err = snd_pcm_hw_params_set_channels_near(*handle, *hw_params, nchannels);
if (!err) err = snd_pcm_hw_params_set_periods_near(*handle, *hw_params, &fragments, 0);
if (!err) err = snd_pcm_hw_params_set_period_size_near(*handle, *hw_params, frames, 0);
if (!err) err = snd_pcm_hw_params(*handle, *hw_params);
if (err) return err;
bits = snd_pcm_hw_params_get_sbits(*hw_params);
if (bits < 0) return bits;
frame_size = *nchannels * (bits / 8);
*buf_size = frame_size * *frames;
return ECP_OK;
}
int a_prepare(snd_pcm_t *handle, snd_pcm_hw_params_t *hw_params, unsigned char *buf, snd_pcm_uframes_t frames) {
snd_pcm_drop(handle);
snd_pcm_prepare(handle);
if (snd_pcm_stream(handle) == SND_PCM_STREAM_PLAYBACK) {
int i, err;
unsigned int fragments;
err = snd_pcm_hw_params_get_periods(hw_params, &fragments, NULL);
if (err) return err;
for (i=0; i<fragments; i++) snd_pcm_writei(handle, buf, frames);
}
return ECP_OK;
}
opus_int32 a_read(snd_pcm_t *handle, unsigned char *buf, snd_pcm_uframes_t frames, OpusEncoder *enc, unsigned char *opus_buf, opus_int32 opus_size) {
snd_pcm_sframes_t frames_in;
while ((frames_in = snd_pcm_readi(handle, buf, frames)) < 0) {
if (frames_in == -EAGAIN)
continue;
snd_pcm_prepare(handle);
}
return opus_encode(enc, (opus_int16 *)buf, frames_in, opus_buf, opus_size);
}
snd_pcm_sframes_t a_write(OpusDecoder *dec, unsigned char *opus_buf, opus_int32 opus_size, snd_pcm_t *handle, unsigned char *buf, snd_pcm_uframes_t frames) {
snd_pcm_sframes_t frames_in, frames_out;
frames_in = opus_decode(dec, opus_buf, opus_size, (opus_int16 *)buf, frames, 0);
while ((frames_out = snd_pcm_writei(handle, buf, frames_in)) < 0) {
if (frames_out == -EAGAIN)
continue;
snd_pcm_prepare(handle);
}
return frames_out;
}
int a_init(void) {
char *dev_name = "hw:1,0";
unsigned int nchannels = 1;
unsigned int sample_rate = 16000;
snd_pcm_hw_params_t *hw_params_plb;
snd_pcm_hw_params_t *hw_params_cpt;
size_t buf_size;
a_open(dev_name, &handle_plb, &hw_params_plb, SND_PCM_STREAM_PLAYBACK, SND_PCM_FORMAT_S16_LE, &nchannels, &sample_rate, &alsa_frames, &buf_size);
alsa_out_buf = malloc(buf_size);
memset(alsa_out_buf, 0, buf_size);
a_prepare(handle_plb, hw_params_plb, alsa_out_buf, alsa_frames);
a_open(dev_name, &handle_cpt, &hw_params_cpt, SND_PCM_STREAM_CAPTURE, SND_PCM_FORMAT_S16_LE, &nchannels, &sample_rate, &alsa_frames, &buf_size);
alsa_in_buf = malloc(buf_size);
memset(alsa_in_buf, 0, buf_size);
a_prepare(handle_cpt, hw_params_cpt, alsa_in_buf, alsa_frames);
int size;
size = opus_encoder_get_size(nchannels);
opus_enc = malloc(size);
opus_encoder_init(opus_enc, sample_rate, nchannels, OPUS_APPLICATION_VOIP);
size = opus_decoder_get_size(nchannels);
opus_dec = malloc(size);
opus_decoder_init(opus_dec, sample_rate, nchannels);
return ECP_OK;
}
ssize_t handle_open_c(ECPConnection *conn, ecp_seq_t sq, unsigned char t, unsigned char *p, ssize_t s, ECP2Buffer *b) {
uint32_t seq = 0;
ecp_conn_handle_open(conn, sq, t, p, s, b);
if (s < 0) {
printf("OPEN ERR:%ld\n", s);
return s;
}
a_init();
open_done = 1;
return s;
}
ssize_t handle_msg_c(ECPConnection *conn, ecp_seq_t sq, unsigned char t, unsigned char *p, ssize_t s, ECP2Buffer *b) {
a_write(opus_dec, p, s, handle_plb, alsa_out_buf, alsa_frames);
return s;
}
static void usage(char *arg) {
fprintf(stderr, "Usage: %s <node.pub>\n", arg);
exit(1);
}
int main(int argc, char *argv[]) {
int rv;
if (argc != 2) usage(argv[0]);
rv = ecp_init(&ctx_c);
printf("ecp_init RV:%d\n", rv);
rv = ecp_conn_handler_init(&handler_c);
handler_c.msg[ECP_MTYPE_OPEN] = handle_open_c;
handler_c.msg[MTYPE_MSG] = handle_msg_c;
ctx_c.handler[CTYPE_TEST] = &handler_c;
rv = ecp_sock_init(&sock_c, &ctx_c, NULL);
printf("ecp_sock_init RV:%d\n", rv);
rv = ecp_sock_open(&sock_c, NULL);
printf("ecp_sock_open RV:%d\n", rv);
rv = ecp_start_receiver(&sock_c);
printf("ecp_start_receiver RV:%d\n", rv);
rv = ecp_util_node_load(&ctx_c, &node, argv[1]);
printf("ecp_util_node_load RV:%d\n", rv);
rv = ecp_conn_init(&conn, &sock_c, CTYPE_TEST);
printf("ecp_conn_init RV:%d\n", rv);
rv = ecp_conn_open(&conn, &node);
printf("ecp_conn_open RV:%d\n", rv);
while(!open_done) sleep(1);
unsigned char payload[ECP_MAX_PLD];
unsigned char *opus_buf;
while(1) {
ecp_pld_set_type(payload, MTYPE_MSG);
opus_buf = ecp_pld_get_buf(payload, 0);
opus_int32 len = a_read(handle_cpt, alsa_in_buf, alsa_frames, opus_enc, opus_buf, ECP_MAX_MSG);
if (len < 0) continue;
ssize_t _rv = ecp_pld_send(&conn, payload, len);
}
}
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