int VoiceStreamer::setparams_c(snd_pcm_t *chandle, int *bufsize) {
int err, last_bufsize = *bufsize;
snd_pcm_hw_params_t *ct_params; // templates w/ rate, format and channels
snd_pcm_hw_params_t *c_params;
snd_pcm_sw_params_t *c_swparams;
snd_pcm_uframes_t c_size, c_psize;
unsigned int val;
snd_pcm_hw_params_alloca(&c_params);
snd_pcm_hw_params_alloca(&ct_params);
snd_pcm_sw_params_alloca(&c_swparams);
if((err = setparams_stream(chandle, ct_params, "capture")) < 0) {
printf("Unable to set parameters for capture stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
bool again = true;
if (buffer_size > 0) {
*bufsize = buffer_size;
again = false;
}
for (;; again = true) {
if (again) {
if (buffer_size > 0)
return -1;
if (last_bufsize == *bufsize)
*bufsize +=4;
last_bufsize = *bufsize;
if (*bufsize > latency_max)
return -1;
}
if ((err = setparams_bufsize(chandle, c_params, ct_params, *bufsize,
"capture")) < 0) {
printf("Unable to set sw parameters for capture stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(c_params, &c_psize, NULL);
if (c_psize > (unsigned int) *bufsize)
*bufsize = c_psize;
snd_pcm_hw_params_get_buffer_size(c_params, &c_size);
if (c_psize*4 < c_size) {
snd_pcm_hw_params_get_periods_min(c_params, &val, NULL);
if (val > 4) {
printf("Capture device does not support 4 periods per buffer\n");
exit(EXIT_FAILURE);
}
continue;
}
break;
}
if ((err = setparams_set(chandle, c_params, c_swparams, "capture")) < 0) {
printf("Unable to set sw parameters for capture stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
fflush(stdout);
return 0;
}
int setparams(snd_pcm_t *phandle, snd_pcm_t *chandle, int *bufsize)
{
int err, last_bufsize = *bufsize;
snd_pcm_hw_params_t *pt_params, *ct_params; /* templates with rate, format and channels */
snd_pcm_hw_params_t *p_params, *c_params;
snd_pcm_sw_params_t *p_swparams, *c_swparams;
snd_pcm_uframes_t p_size, c_size, p_psize, c_psize;
unsigned int p_time, c_time;
unsigned int val;
snd_pcm_hw_params_alloca(&p_params);
snd_pcm_hw_params_alloca(&c_params);
snd_pcm_hw_params_alloca(&pt_params);
snd_pcm_hw_params_alloca(&ct_params);
snd_pcm_sw_params_alloca(&p_swparams);
snd_pcm_sw_params_alloca(&c_swparams);
if ((err = setparams_stream(phandle, pt_params, "playback")) < 0) {
printf("Unable to set parameters for playback stream: %s\n", snd_strerror(err));
exit(0);
}
if ((err = setparams_stream(chandle, ct_params, "capture")) < 0) {
printf("Unable to set parameters for capture stream: %s\n", snd_strerror(err));
exit(0);
}
if (buffer_size > 0) {
*bufsize = buffer_size;
goto __set_it;
}
__again:
if (buffer_size > 0)
return -1;
if (last_bufsize == *bufsize)
*bufsize += 4;
last_bufsize = *bufsize;
if (*bufsize > latency_max)
return -1;
__set_it:
if ((err = setparams_bufsize(phandle, p_params, pt_params, *bufsize, "playback")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n", snd_strerror(err));
exit(0);
}
if ((err = setparams_bufsize(chandle, c_params, ct_params, *bufsize, "capture")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n", snd_strerror(err));
exit(0);
}
snd_pcm_hw_params_get_period_size(p_params, &p_psize, NULL);
if (p_psize > (unsigned int)*bufsize)
*bufsize = p_psize;
snd_pcm_hw_params_get_period_size(c_params, &c_psize, NULL);
if (c_psize > (unsigned int)*bufsize)
*bufsize = c_psize;
snd_pcm_hw_params_get_period_time(p_params, &p_time, NULL);
snd_pcm_hw_params_get_period_time(c_params, &c_time, NULL);
if (p_time != c_time)
goto __again;
snd_pcm_hw_params_get_buffer_size(p_params, &p_size);
if (p_psize * 2 < p_size) {
snd_pcm_hw_params_get_periods_min(p_params, &val, NULL);
if (val > 2) {
printf("playback device does not support 2 periods per buffer\n");
exit(0);
}
goto __again;
}
snd_pcm_hw_params_get_buffer_size(c_params, &c_size);
if (c_psize * 2 < c_size) {
snd_pcm_hw_params_get_periods_min(c_params, &val, NULL);
if (val > 2 ) {
printf("capture device does not support 2 periods per buffer\n");
exit(0);
}
goto __again;
}
if ((err = setparams_set(phandle, p_params, p_swparams, "playback")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n", snd_strerror(err));
exit(0);
}
if ((err = setparams_set(chandle, c_params, c_swparams, "capture")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n", snd_strerror(err));
exit(0);
}
if ((err = snd_pcm_prepare(phandle)) < 0) {
printf("Prepare error: %s\n", snd_strerror(err));
exit(0);
}
snd_pcm_dump(phandle, output);
snd_pcm_dump(chandle, output);
fflush(stdout);
return 0;
}
int VoiceStreamer::setparams_p(snd_pcm_t *phandle, int *bufsize) {
int err, last_bufsize = *bufsize;
snd_pcm_hw_params_t *pt_params;
snd_pcm_hw_params_t *p_params;
snd_pcm_sw_params_t *p_swparams;
snd_pcm_uframes_t p_size, p_psize;
unsigned int val;
snd_pcm_hw_params_alloca(&p_params);
snd_pcm_hw_params_alloca(&pt_params);
snd_pcm_sw_params_alloca(&p_swparams);
if ((err = setparams_stream(phandle, pt_params, "playback")) < 0) {
printf("Unable to set parameters for playback stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
bool again = true;
if (buffer_size > 0) {
*bufsize = buffer_size;
again = false;
}
for (;; again = true) {
if (again) {
if (buffer_size > 0)
return -1;
if (last_bufsize == *bufsize)
*bufsize +=4;
last_bufsize = *bufsize;
if (*bufsize > latency_max)
return -1;
}
if ((err = setparams_bufsize(phandle, p_params, pt_params, *bufsize,
"playback")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(p_params, &p_psize, NULL);
if (p_psize > (unsigned int) *bufsize)
*bufsize = p_psize;
snd_pcm_hw_params_get_buffer_size(p_params, &p_size);
if (p_psize*4 < p_size) {
snd_pcm_hw_params_get_periods_min(p_params, &val, NULL);
if (val > 4) {
printf("Playback device does not support 4 periods per buffer\n");
exit(EXIT_FAILURE);
}
continue;
}
break;
}
if ((err = setparams_set(phandle, p_params, p_swparams, "playback")) < 0) {
printf("Unable to set sw parameters for playback stream: %s\n",
snd_strerror(err));
exit(EXIT_FAILURE);
}
fflush(stdout);
return 0;
}
