int main(int argc, char **argv){
int i;
int aver,val,val2;
int16_t buf[BUFSIZE];
double d_buffer[BUFSIZE];
double pitch = 0.0;
struct timespec before,after;
struct pitch_tracker_params *settings;
snd_pcm_uframes_t period_size = PERIOD_SIZE;
//ALSA PCM configuration
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
int dir,rc;
snd_pcm_uframes_t frames;
/* Open PCM device for capture */
rc = snd_pcm_open( &handle, "default" , SND_PCM_STREAM_CAPTURE , 0);
if(rc < 0 ){
fprintf(stderr,"unable to open pcm device: %s\n",snd_strerror(rc));
exit(1);
}
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(¶ms);
/* Fill it in with default values. */
snd_pcm_hw_params_any(handle, params);
/* Set the desired hardware parameters. */
/* Interleaved mode */
snd_pcm_hw_params_set_access(handle, params,SND_PCM_ACCESS_RW_INTERLEAVED);
/* unsigned 16-bit format */
snd_pcm_hw_params_set_format(handle, params,SND_PCM_FORMAT_S16);
snd_pcm_hw_params_set_channels(handle, params, 1);
/* 44100 bits/second sampling rate */
val = 44100;
snd_pcm_hw_params_set_rate_near(handle,params, &val, &dir);
/* set size time*/
snd_pcm_hw_params_set_period_size_near(handle, params, &period_size , &dir);
/* write configuration */
rc = snd_pcm_hw_params(handle,params);
/*Display info*/
printf("PCM handle name = '%s'\n",
snd_pcm_name(handle));
printf("PCM state = %s\n",
snd_pcm_state_name(snd_pcm_state(handle)));
snd_pcm_hw_params_get_access(params,
(snd_pcm_access_t *) &val);
printf("access type = %s\n",
snd_pcm_access_name((snd_pcm_access_t)val));
snd_pcm_hw_params_get_format(params, &val);
printf("format = '%s' (%s)\n",
snd_pcm_format_name((snd_pcm_format_t)val),
snd_pcm_format_description(
(snd_pcm_format_t)val));
snd_pcm_hw_params_get_subformat(params,
(snd_pcm_subformat_t *)&val);
printf("subformat = '%s' (%s)\n",
snd_pcm_subformat_name((snd_pcm_subformat_t)val),
snd_pcm_subformat_description(
(snd_pcm_subformat_t)val));
snd_pcm_hw_params_get_channels(params, &val);
printf("channels = %d\n", val);
snd_pcm_hw_params_get_rate(params, &val, &dir);
printf("rate = %d bps\n", val);
snd_pcm_hw_params_get_period_time(params,
&val, &dir);
printf("period time = %d us\n", val);
snd_pcm_hw_params_get_period_size(params,
&frames, &dir);
printf("period size = %d frames\n", (int)frames);
snd_pcm_hw_params_get_buffer_time(params,
&val, &dir);
printf("buffer time = %d us\n", val);
snd_pcm_hw_params_get_buffer_size(params,
(snd_pcm_uframes_t *) &val);
printf("buffer size = %d frames\n", val);
snd_pcm_hw_params_get_periods(params, &val, &dir);
printf("periods per buffer = %d frames\n", val);
snd_pcm_hw_params_get_rate_numden(params,
&val, &val2);
printf("exact rate = %d/%d bps\n", val, val2);
val = snd_pcm_hw_params_get_sbits(params);
printf("significant bits = %d\n", val);
val = snd_pcm_hw_params_is_batch(params);
printf("is batch = %d\n", val);
val = snd_pcm_hw_params_is_block_transfer(params);
printf("is block transfer = %d\n", val);
val = snd_pcm_hw_params_is_double(params);
printf("is double = %d\n", val);
val = snd_pcm_hw_params_is_half_duplex(params);
printf("is half duplex = %d\n", val);
val = snd_pcm_hw_params_is_joint_duplex(params);
printf("is joint duplex = %d\n", val);
val = snd_pcm_hw_params_can_overrange(params);
printf("can overrange = %d\n", val);
val = snd_pcm_hw_params_can_mmap_sample_resolution(params);
printf("can mmap = %d\n", val);
val = snd_pcm_hw_params_can_pause(params);
printf("can pause = %d\n", val);
val = snd_pcm_hw_params_can_resume(params);
printf("can resume = %d\n", val);
val = snd_pcm_hw_params_can_sync_start(params);
printf("can sync start = %d\n", val);
settings = open_pitch_tracker();
while(1){
rc = snd_pcm_readi(handle, buf, frames);
if (rc == -EPIPE) {
/* EPIPE means overrun */
fprintf(stderr, "overrun occurred\n");
snd_pcm_prepare(handle);
} else if (rc < 0) {
fprintf(stderr,
"error from read: %s\n",
snd_strerror(rc));
} else if (rc != (int)frames) {
fprintf(stderr, "short read, read %d frames\n", rc);
}
for( i = 0 ; i< BUFSIZE ; i++){
d_buffer[i] = (double) buf[i];
}
pitch = compute_pitch(d_buffer, BUFSIZE, S16, settings ,ACCURACY);
if( pitch != 0.0 )
printf("frequency -> %f\n",pitch);
memset(buf,0,BUFSIZE);
}
close_pitch_tracker(&settings);
snd_pcm_drain(handle);
snd_pcm_close(handle);
return 0;
}
int main(int argc, char *argv[])
{
const char *device_name = "hw";
snd_pcm_t *pcm;
snd_pcm_hw_params_t *hw_params;
unsigned int i;
unsigned int min, max;
int any_rate;
int err;
if (argc > 1)
device_name = argv[1];
err = snd_pcm_open(&pcm, device_name, SND_PCM_STREAM_CAPTURE,
SND_PCM_NONBLOCK);
if (err < 0) {
fprintf(stderr, "cannot open device '%s': %s\n", device_name,
snd_strerror(err));
return 1;
}
snd_pcm_hw_params_alloca(&hw_params);
err = snd_pcm_hw_params_any(pcm, hw_params);
if (err < 0) {
fprintf(stderr, "cannot get hardware parameters: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Device: %s (type: %s)\n", device_name,
snd_pcm_type_name(snd_pcm_type(pcm)));
printf("Access types:");
for (i = 0; i < ARRAY_SIZE(accesses); ++i) {
if (!snd_pcm_hw_params_test_access(pcm, hw_params, accesses[i]))
printf(" %s", snd_pcm_access_name(accesses[i]));
}
putchar('\n');
printf("Formats:");
for (i = 0; i < ARRAY_SIZE(formats); ++i) {
if (!snd_pcm_hw_params_test_format(pcm, hw_params, formats[i]))
printf(" %s", snd_pcm_format_name(formats[i]));
}
putchar('\n');
err = snd_pcm_hw_params_get_channels_min(hw_params, &min);
if (err < 0) {
fprintf(stderr, "cannot get minimum channels count: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
if (err < 0) {
fprintf(stderr, "cannot get maximum channels count: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Channels:");
for (i = min; i <= max; ++i) {
if (!snd_pcm_hw_params_test_channels(pcm, hw_params, i))
printf(" %u", i);
}
putchar('\n');
err = snd_pcm_hw_params_get_rate_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum rate: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_rate_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum rate: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Sample rates:");
if (min == max)
printf(" %u", min);
else if (!snd_pcm_hw_params_test_rate(pcm, hw_params, min + 1, 0))
printf(" %u-%u", min, max);
else {
any_rate = 0;
for (i = 0; i < ARRAY_SIZE(rates); ++i) {
if (!snd_pcm_hw_params_test_rate(pcm, hw_params,
rates[i], 0)) {
any_rate = 1;
printf(" %u", rates[i]);
}
}
if (!any_rate)
printf(" %u-%u", min, max);
}
putchar('\n');
err = snd_pcm_hw_params_get_period_time_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum period time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_period_time_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum period time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Interrupt interval: %u-%u us\n", min, max);
err = snd_pcm_hw_params_get_buffer_time_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum buffer time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_buffer_time_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum buffer time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Buffer size: %u-%u us\n", min, max);
snd_pcm_close(pcm);
return 0;
}
bool QAudioInputPrivate::open( QObject *input )
{
// Open the Alsa capture device.
bool rc = true;
int err;
unsigned int freakuency = frequency;
if ((err = snd_pcm_open(&handle,
m_device.constData(), //"plughw:0,0"
SND_PCM_STREAM_CAPTURE,
0/*SND_PCM_ASYNC*/)) < 0) {
qWarning( "QAudioInput: snd_pcm_open: error %d", err);
rc = false;
}
else {
snd_pcm_hw_params_t *hwparams;
// We want non-blocking mode.
snd_pcm_nonblock(handle, 1);
// Set the desired parameters.
snd_pcm_hw_params_alloca(&hwparams);
err = snd_pcm_hw_params_any(handle, hwparams);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_any: err %d", err);
}
err = snd_pcm_hw_params_set_access(handle, hwparams,
access);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_access: err %d",err);
}
err = snd_pcm_hw_params_set_format(handle, hwparams,format);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_format: err %d",err);
}
err = snd_pcm_hw_params_set_channels(handle,hwparams,(unsigned int)channels);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_channels: err %d",err);
}
err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &freakuency, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_rate_near: err %d",err);
}
if(freakuency > 1.05 * frequency || freakuency < 0.95 * frequency) {
qWarning("QAudioInput: warning, sample rate %i not supported by the hardware, using %u", frequency, freakuency);
}
if ( samplesPerBlock != -1 ) {
// Set buffer and period sizes based on the supplied block size.
sample_size = (snd_pcm_uframes_t)( samplesPerBlock * channels / 8 );
err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &freakuency, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_rate_near: err %d",err);
}
if(freakuency > 1.05 * frequency || freakuency < 0.95 * frequency) {
qWarning( "QAudioInput: warning, sample rate %i not supported by the hardware, using %u", frequency, freakuency);
}
err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_buffer_time_near: err %d",err);
}
period_time = 1000000 * 256 / frequency;
err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_period_time_near: err %d",err);
}
} else {
// Use the largest buffer and period sizes we can.
err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_buffer_time_near: err %d",err);
}
period_time = 1000000 * 256 / frequency;
err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, 0);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params_set_period_time_near: err %d",err);
}
}
err = snd_pcm_hw_params(handle, hwparams);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_hw_params: err %d",err);
}
int dir;
unsigned int vval, vval2;
snd_pcm_access_t aval;
snd_pcm_format_t fval;
snd_pcm_subformat_t sval;
qLog(QAudioInput) << "PCM handle name = " << snd_pcm_name(handle);
qLog(QAudioInput) << "PCM state = " << snd_pcm_state_name(snd_pcm_state(handle));
snd_pcm_hw_params_get_access(hwparams,&aval);
vval = (unsigned int)aval;
if ( (int)vval != (int)access ) {
qLog(QAudioInput) << QString("access type not set, want %1 got %2")
.arg(snd_pcm_access_name((snd_pcm_access_t)access))
.arg(snd_pcm_access_name((snd_pcm_access_t)vval));
access = (snd_pcm_access_t)vval;
}
qLog(QAudioInput) << "access type = " << snd_pcm_access_name((snd_pcm_access_t)vval);
snd_pcm_hw_params_get_format(hwparams, &fval);
vval = (unsigned int)fval;
if ( (int)vval != (int)format ) {
qLog(QAudioInput) << QString("format type not set, want %1 got %2")
.arg(snd_pcm_format_name((snd_pcm_format_t)format))
.arg(snd_pcm_format_name((snd_pcm_format_t)vval));
format = (snd_pcm_format_t)vval;
}
qLog(QAudioInput) << QString("format = '%1' (%2)")
.arg(snd_pcm_format_name((snd_pcm_format_t)vval))
.arg(snd_pcm_format_description((snd_pcm_format_t)vval))
.toLatin1().constData();
snd_pcm_hw_params_get_subformat(hwparams,&sval);
vval = (unsigned int)sval;
qLog(QAudioInput) << QString("subformat = '%1' (%2)")
.arg(snd_pcm_subformat_name((snd_pcm_subformat_t)vval))
.arg(snd_pcm_subformat_description((snd_pcm_subformat_t)vval))
.toLatin1().constData();
snd_pcm_hw_params_get_channels(hwparams, &vval);
if ( (int)vval != (int)channels ) {
qLog(QAudioInput) << QString("channels type not set, want %1 got %2").arg(channels).arg(vval);
channels = vval;
}
qLog(QAudioInput) << "channels = " << vval;
snd_pcm_hw_params_get_rate(hwparams, &vval, &dir);
if ( (int)vval != (int)frequency ) {
qLog(QAudioInput) << QString("frequency type not set, want %1 got %2").arg(frequency).arg(vval);
frequency = vval;
}
qLog(QAudioInput) << "rate =" << vval << " bps";
snd_pcm_hw_params_get_period_time(hwparams,&period_time, &dir);
qLog(QAudioInput) << "period time =" << period_time << " us";
snd_pcm_hw_params_get_period_size(hwparams,&period_size, &dir);
qLog(QAudioInput) << "period size =" << (int)period_size;
snd_pcm_hw_params_get_buffer_time(hwparams,&buffer_time, &dir);
qLog(QAudioInput) << "buffer time =" << buffer_time;
snd_pcm_hw_params_get_buffer_size(hwparams,(snd_pcm_uframes_t *) &buffer_size);
qLog(QAudioInput) << "buffer size =" << (int)buffer_size;
snd_pcm_hw_params_get_periods(hwparams, &vval, &dir);
qLog(QAudioInput) << "periods per buffer =" << vval;
snd_pcm_hw_params_get_rate_numden(hwparams, &vval, &vval2);
qLog(QAudioInput) << QString("exact rate = %1/%2 bps").arg(vval).arg(vval2).toLatin1().constData();
vval = snd_pcm_hw_params_get_sbits(hwparams);
qLog(QAudioInput) << "significant bits =" << vval;
snd_pcm_hw_params_get_tick_time(hwparams,&vval, &dir);
qLog(QAudioInput) << "tick time =" << vval;
vval = snd_pcm_hw_params_is_batch(hwparams);
qLog(QAudioInput) << "is batch =" << vval;
vval = snd_pcm_hw_params_is_block_transfer(hwparams);
qLog(QAudioInput) << "is block transfer =" << vval;
vval = snd_pcm_hw_params_is_double(hwparams);
qLog(QAudioInput) << "is double =" << vval;
vval = snd_pcm_hw_params_is_half_duplex(hwparams);
qLog(QAudioInput) << "is half duplex =" << vval;
vval = snd_pcm_hw_params_is_joint_duplex(hwparams);
qLog(QAudioInput) << "is joint duplex =" << vval;
vval = snd_pcm_hw_params_can_overrange(hwparams);
qLog(QAudioInput) << "can overrange =" << vval;
vval = snd_pcm_hw_params_can_mmap_sample_resolution(hwparams);
qLog(QAudioInput) << "can mmap =" << vval;
vval = snd_pcm_hw_params_can_pause(hwparams);
qLog(QAudioInput) << "can pause =" << vval;
vval = snd_pcm_hw_params_can_resume(hwparams);
qLog(QAudioInput) << "can resume =" << vval;
vval = snd_pcm_hw_params_can_sync_start(hwparams);
qLog(QAudioInput) << "can sync start =" << vval;
snd_pcm_sw_params_t *swparams;
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_sw_params_current(handle, swparams);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_sw_params_current: err %d",err);
}
err = snd_pcm_sw_params_set_start_threshold(handle,swparams,period_size);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_sw_params_set_start_threshold: err %d",err);
}
err = snd_pcm_sw_params_set_avail_min(handle, swparams,period_size);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_sw_params_set_avail_min: err %d",err);
}
err = snd_pcm_sw_params_set_xfer_align(handle, swparams, 1);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_sw_params_set_xfer_align: err %d",err);
}
err = snd_pcm_sw_params(handle, swparams);
if ( err < 0 ) {
qWarning( "QAudioInput: snd_pcm_sw_params: err %d",err);
}
snd_pcm_prepare(handle);
snd_pcm_start(handle);
int count = snd_pcm_poll_descriptors_count(handle);
pollfd *pfds = new pollfd[count];
snd_pcm_poll_descriptors(handle, pfds, count);
for (int i = 0; i < count; ++i)
{
if ((pfds[i].events & POLLIN) != 0) {
notifier = new QSocketNotifier(pfds[i].fd, QSocketNotifier::Read);
QObject::connect(notifier,
SIGNAL(activated(int)),
input,
SIGNAL(readyRead()));
break;
}
}
if (notifier == NULL) {
rc = false;
}
delete pfds;
}
return rc;
}
/**************************************************************************
* ALSA_TraceParameters [internal]
*
* used to trace format changes, hw and sw parameters
*/
void ALSA_TraceParameters(snd_pcm_hw_params_t * hw_params, snd_pcm_sw_params_t * sw, int full)
{
int err;
snd_pcm_format_t format;
snd_pcm_access_t access;
#define X(x) ((x)? "true" : "false")
if (full)
TRACE("FLAGS: sampleres=%s overrng=%s pause=%s resume=%s syncstart=%s batch=%s block=%s double=%s "
"halfd=%s joint=%s\n",
X(snd_pcm_hw_params_can_mmap_sample_resolution(hw_params)),
X(snd_pcm_hw_params_can_overrange(hw_params)),
X(snd_pcm_hw_params_can_pause(hw_params)),
X(snd_pcm_hw_params_can_resume(hw_params)),
X(snd_pcm_hw_params_can_sync_start(hw_params)),
X(snd_pcm_hw_params_is_batch(hw_params)),
X(snd_pcm_hw_params_is_block_transfer(hw_params)),
X(snd_pcm_hw_params_is_double(hw_params)),
X(snd_pcm_hw_params_is_half_duplex(hw_params)),
X(snd_pcm_hw_params_is_joint_duplex(hw_params)));
#undef X
err = snd_pcm_hw_params_get_access(hw_params, &access);
if (err >= 0)
{
TRACE("access=%s\n", snd_pcm_access_name(access));
}
else
{
snd_pcm_access_mask_t * acmask;
acmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_access_mask_sizeof());
snd_pcm_hw_params_get_access_mask(hw_params, acmask);
for ( access = SND_PCM_ACCESS_MMAP_INTERLEAVED; access <= SND_PCM_ACCESS_LAST; access++)
if (snd_pcm_access_mask_test(acmask, access))
TRACE("access=%s\n", snd_pcm_access_name(access));
HeapFree( GetProcessHeap(), 0, acmask );
}
err = snd_pcm_hw_params_get_format(hw_params, &format);
if (err >= 0)
{
TRACE("format=%s\n", snd_pcm_format_name(format));
}
else
{
snd_pcm_format_mask_t * fmask;
fmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_format_mask_sizeof());
snd_pcm_hw_params_get_format_mask(hw_params, fmask);
for ( format = SND_PCM_FORMAT_S8; format <= SND_PCM_FORMAT_LAST ; format++)
if ( snd_pcm_format_mask_test(fmask, format) )
TRACE("format=%s\n", snd_pcm_format_name(format));
HeapFree( GetProcessHeap(), 0, fmask );
}
do {
int err=0;
unsigned int val=0;
err = snd_pcm_hw_params_get_channels(hw_params, &val);
if (err<0) {
unsigned int min = 0;
unsigned int max = 0;
err = snd_pcm_hw_params_get_channels_min(hw_params, &min),
err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
TRACE("channels_min=%u, channels_min_max=%u\n", min, max);
} else {
TRACE("channels=%d\n", val);
}
} while(0);
do {
int err=0;
snd_pcm_uframes_t val=0;
err = snd_pcm_hw_params_get_buffer_size(hw_params, &val);
if (err<0) {
snd_pcm_uframes_t min = 0;
snd_pcm_uframes_t max = 0;
err = snd_pcm_hw_params_get_buffer_size_min(hw_params, &min),
err = snd_pcm_hw_params_get_buffer_size_max(hw_params, &max);
TRACE("buffer_size_min=%lu, buffer_size_min_max=%lu\n", min, max);
} else {
TRACE("buffer_size=%lu\n", val);
}
} while(0);
#define X(x) do { \
int err=0; \
int dir=0; \
unsigned int val=0; \
err = snd_pcm_hw_params_get_##x(hw_params,&val, &dir); \
if (err<0) { \
unsigned int min = 0; \
unsigned int max = 0; \
err = snd_pcm_hw_params_get_##x##_min(hw_params, &min, &dir); \
err = snd_pcm_hw_params_get_##x##_max(hw_params, &max, &dir); \
TRACE(#x "_min=%u " #x "_max=%u\n", min, max); \
} else \
TRACE(#x "=%d\n", val); \
} while(0)
X(rate);
X(buffer_time);
X(periods);
do {
int err=0;
int dir=0;
snd_pcm_uframes_t val=0;
err = snd_pcm_hw_params_get_period_size(hw_params, &val, &dir);
if (err<0) {
snd_pcm_uframes_t min = 0;
snd_pcm_uframes_t max = 0;
err = snd_pcm_hw_params_get_period_size_min(hw_params, &min, &dir),
err = snd_pcm_hw_params_get_period_size_max(hw_params, &max, &dir);
TRACE("period_size_min=%lu, period_size_min_max=%lu\n", min, max);
} else {
TRACE("period_size=%lu\n", val);
}
} while(0);
X(period_time);
#undef X
if (!sw)
return;
}
int main() {
int result;
snd_pcm_t *handle = NULL;
snd_pcm_hw_params_t *params = NULL;
snd_pcm_uframes_t frames;
snd_pcm_access_t access;
snd_pcm_format_t format;
unsigned int rate = 44100;
unsigned int val, val2;
int dir = 0;
const char *device = getenv ("ALSA_DEFAULT");
if (device == NULL) {
device = "default";
}
result = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0);
if (result < 0)
showErrorAndExit(result, "Error: Unable to open PCM device: %s\n");
result = snd_pcm_hw_params_malloc(¶ms);
if (result < 0)
showErrorAndExit(result, "Error: No memory for hardware parameters: %s\n");
result = snd_pcm_hw_params_any(handle, params);
if (result < 0)
showErrorAndExit(result, "Error: Cannot read HW params: %s\n");
result = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (result < 0)
showErrorAndExit(result, "Could not set access method: %s\n");
result = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
if (result < 0)
showErrorAndExit(result, "Error: Could not set output format: %s\n");
result = snd_pcm_hw_params_set_channels(handle, params, 1);
if (result < 0)
showErrorAndExit(result, "Error: Cannot set to 1 channel: %s\n");
result = snd_pcm_hw_params_set_rate_near(handle, params, &rate, &dir);
if (result < 0)
showErrorAndExit(result, "Error: Could not set rate: %s\n");
result = snd_pcm_hw_params(handle, params);
if (result < 0)
showErrorAndExit(result, "Error: Could not write HW params: %s\n");
printf("Card Parameters\n");
printf("%30s: %s\n", "Alsa Library Version", snd_asoundlib_version());
result = snd_pcm_hw_params_get_access(params, &access);
if (result < 0) {
showErrorAndExit(result, "Error: Could not retrieve access mode: %s\n");
} else {
printf("%30s: %s\n", "Access Method", snd_pcm_access_name(access));
}
result = snd_pcm_hw_params_get_format(params, &format);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve format type: %d\n");
} else {
printf("%30s: %s\n", "Format", snd_pcm_format_name(format));
}
result = snd_pcm_hw_params_get_channels(params, &val);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve channel count: %s\n");
} else {
printf("%30s: %d\n", "Channels", val);
}
result = snd_pcm_hw_params_get_rate(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve rate: %s\n");
} else {
printf("%30s: %d bps\n", "Rate", val);
}
result = snd_pcm_hw_params_get_period_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve period time: %s\n");
} else {
printf("%30s: %d us\n", "Period Time", val);
}
result = snd_pcm_hw_params_get_period_size(params, &frames, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve period size: %s\n");
} else {
printf("%30s: %d frames\n", "Period Size", (int) frames);
}
result = snd_pcm_hw_params_get_buffer_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve buffer time: %s\n");
} else {
printf("%30s: %d us\n", "Buffer Time", val);
}
result = snd_pcm_hw_params_get_buffer_size(params, &frames);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve buffer size: %s\n");
} else {
printf("%30s: %d frames\n", "Buffer Size", (int) frames);
}
result = snd_pcm_hw_params_get_periods(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to get buffer periods: %s\n");
} else {
printf("%30s: %d frames\n", "Periods per Buffer", val);
}
result = snd_pcm_hw_params_get_rate_numden(params, &val, &val2);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to get rate numerator/denominator: %s\n");
} else {
printf("%30s: %d/%d bps\n", "Exact Rate", val, val2);
}
val = snd_pcm_hw_params_get_sbits(params);
printf("%30s: %d\n", "Significant Bits", val);
result = snd_pcm_hw_params_get_tick_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Could not retrieve tick time: %s\n");
} else {
printf("%30s: %d\n", "Tick Time", val);
}
printf("Card Capabilities\n");
val = snd_pcm_hw_params_is_batch(params);
printf("%30s: %s\n", "Batch Transfer", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_block_transfer(params);
printf("%30s: %s\n", "Block Transfer", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_double(params);
printf("%30s: %s\n", "Double Buffering", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_half_duplex(params);
printf("%30s: %s\n", "Half Duplex Only", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_joint_duplex(params);
printf("%30s: %s\n", "Joint Duplex Capable", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_overrange(params);
printf("%30s: %s\n", "Support Overrange Detection", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_mmap_sample_resolution(params);
printf("%30s: %s\n", "Support Sample-res Mmap", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_pause(params);
printf("%30s: %s\n", "Can Pause", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_resume(params);
printf("%30s: %s\n", "Can Resume", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_sync_start(params);
printf("%30s: %s\n", "Support Sync Start", (val ? "Yes" : "No"));
result = snd_pcm_close(handle);
if (result < 0)
showErrorAndExit(result, "Error: Could not close PCM device: %s\n");
return 0;
}
int pcm_open_set_device() {
int rc;
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
snd_pcm_format_t val3;
unsigned int val, val2;
int dir;
snd_pcm_uframes_t frames;
/* Open PCM device for playback. */
//plughw:U0x46d0x825,0
//hw:1,0
rc = snd_pcm_open(&handle, "plughw:1,0", SND_PCM_STREAM_PLAYBACK, 0);
if (rc < 0) {
fprintf(stderr, "unable to open pcm device: %s\n", snd_strerror(rc));
exit(1);
}
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(¶ms);
/* Fill it in with default values. */
snd_pcm_hw_params_any(handle, params);
/* Set the desired hardware parameters. */
/* Interleaved mode */
snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_NONINTERLEAVED);
/* Signed 16-bit little-endian format */
snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels(handle, params, 2);
/* 44100 bits/second sampling rate (CD quality) */
val = 44100;
snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir);
/* Write the parameters to the driver */
rc = snd_pcm_hw_params(handle, params);
if (rc < 0) {
fprintf(stderr, "unable to set hw parameters: %s\n", snd_strerror(rc));
exit(1);
}
/* Display information about the PCM interface */
printf("PCM handle name = '%s'\n", snd_pcm_name(handle));
printf("PCM state = %s\n", snd_pcm_state_name(snd_pcm_state(handle)));
snd_pcm_hw_params_get_access(params, (snd_pcm_access_t *) & val);
printf("access type = %s\n", snd_pcm_access_name((snd_pcm_access_t) val));
snd_pcm_hw_params_get_format(params, (snd_pcm_format_t*) & val);
printf("format = '%s' (%s)\n", snd_pcm_format_name((snd_pcm_format_t) val), snd_pcm_format_description((snd_pcm_format_t) val));
snd_pcm_hw_params_get_subformat(params, (snd_pcm_subformat_t *) & val);
printf("subformat = '%s' (%s)\n", snd_pcm_subformat_name((snd_pcm_subformat_t) val), snd_pcm_subformat_description((snd_pcm_subformat_t) val));
snd_pcm_hw_params_get_channels(params, &val);
printf("channels = %d\n", val);
snd_pcm_hw_params_get_rate(params, &val, &dir);
printf("rate = %d sps\n", val);
snd_pcm_hw_params_get_period_time(params,
&val, &dir);
printf("period time = %d us\n", val);
snd_pcm_hw_params_get_period_size(params,
&frames, &dir);
printf("period size = %d frames\n", (int) frames);
snd_pcm_hw_params_get_buffer_time(params,
&val, &dir);
printf("buffer time = %d us\n", val);
snd_pcm_hw_params_get_buffer_size(params,
(snd_pcm_uframes_t *) & val);
printf("buffer size = %d frames\n", val);
snd_pcm_hw_params_get_periods(params, &val, &dir);
printf("periods per buffer = %d frames\n", val);
snd_pcm_hw_params_get_rate_numden(params,
&val, &val2);
printf("exact rate = %d/%d bps\n", val, val2);
val = snd_pcm_hw_params_get_sbits(params);
printf("significant bits = %d\n", val);
snd_pcm_hw_params_get_tick_time(params, &val, &dir);
printf("tick time = %d us\n", val);
val = snd_pcm_hw_params_is_batch(params);
printf("is batch = %d\n", val);
val = snd_pcm_hw_params_is_block_transfer(params);
printf("is block transfer = %d\n", val);
val = snd_pcm_hw_params_is_double(params);
printf("is double = %d\n", val);
val = snd_pcm_hw_params_is_half_duplex(params);
printf("is half duplex = %d\n", val);
val = snd_pcm_hw_params_is_joint_duplex(params);
printf("is joint duplex = %d\n", val);
val = snd_pcm_hw_params_can_overrange(params);
printf("can overrange = %d\n", val);
val = snd_pcm_hw_params_can_mmap_sample_resolution(params);
printf("can mmap = %d\n", val);
val = snd_pcm_hw_params_can_pause(params);
printf("can pause = %d\n", val);
val = snd_pcm_hw_params_can_resume(params);
printf("can resume = %d\n", val);
val = snd_pcm_hw_params_can_sync_start(params);
printf("can sync start = %d\n", val);
snd_pcm_close(handle);
return 0;
}
