void *write_pcmdata(void *arg)
{
dbg("Enter write_pcmdata thread.....\n");
int ret;
msg_t pcm_data;
snd_pcm_sframes_t avail;
common_data_t *p_common_data = (common_data_t *)arg;
dbg("PCM handle name = '%s'\n",snd_pcm_name(p_common_data->handle));
dbg("period szie = %lu\n",p_common_data->period_size);
while (1) {
sem_wait(&p_common_data->queue.wait);
if((read_item_from_queue(&p_common_data->queue, &pcm_data)) == EMPTY){
dbg("queue is empty...\n");
//TODO:block?
continue;
}
snd_pcm_prepare(p_common_data->handle);
ret = snd_pcm_writei(p_common_data->handle, pcm_data.pcm_msg, p_common_data->period_size);
if (ret == -EAGAIN) { //means try again
/* wait 1000ms for pcm device to become ready */
dbg_alsa("EAGAIN error, Sleep for 1000ms\n");
snd_pcm_wait(p_common_data->handle, 1000);
}
else if (ret == -EPIPE) {
/* EPIPE means underrun */
snd_pcm_prepare(p_common_data->handle);
dbg_alsa("underrun occurred\n");
}
else if(ret == -ESTRPIPE) {
dbg_alsa("Need suspend\n");
}
else if (ret < 0) {
dbg_alsa("error from writei: %s\n", snd_strerror(ret));
}
ret = snd_pcm_state(p_common_data->handle);
dbg("state is %d\n", ret);
sem_post(&p_common_data->queue.full);
}
}
bool CAESinkALSA::TryDevice(const std::string &name, snd_pcm_t **pcmp, snd_config_t *lconf)
{
/* Check if this device was already open (e.g. when checking for supported
* channel count in EnumerateDevice()) */
if (*pcmp)
{
if (name == snd_pcm_name(*pcmp))
return true;
snd_pcm_close(*pcmp);
*pcmp = NULL;
}
int err = snd_pcm_open_lconf(pcmp, name.c_str(), SND_PCM_STREAM_PLAYBACK, ALSA_OPTIONS, lconf);
if (err < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA - Unable to open device \"%s\" for playback", name.c_str());
}
return err == 0;
}
void alsa_print_info(snd_pcm_t * handle, snd_pcm_hw_params_t * hwp) {
printf("device [%s] opened with\n",
snd_pcm_name(handle));
printf("\tstate=%s\n",
snd_pcm_state_name(snd_pcm_state(handle)));
unsigned int val, val2;
snd_pcm_hw_params_get_access(hwp,
(snd_pcm_access_t *) &val);
printf("\taccess_type=%s\n",
snd_pcm_access_name((snd_pcm_access_t)val));
snd_pcm_hw_params_get_format(hwp, (snd_pcm_format_t *) &val);
printf("\tformat=%s\n",
snd_pcm_format_name((snd_pcm_format_t) val)
);
snd_pcm_hw_params_get_channels(hwp, &val);
printf("\tchannels=%d\n", val);
snd_pcm_hw_params_get_rate(hwp, &val, (int *) &val2);
printf("\trate=%d fps\n", val);
snd_pcm_hw_params_get_period_time(hwp,
&val, (int *) &val2);
printf("\tperiod_time=%d us\n", val);
snd_pcm_uframes_t frames;
snd_pcm_hw_params_get_period_size(hwp,
&frames, (int *) &val2);
printf("\tperiod_size=%d frames\n", (int)frames);
snd_pcm_hw_params_get_buffer_size(hwp,
(snd_pcm_uframes_t *) &val);
printf("\tbuffer_size=%d frames\n", val);
snd_pcm_hw_params_get_periods(hwp, &val, (int *) &val2);
printf("\tperiods_per_buffer=%d periods\n", val);
}
pcm_player *pcm_player_init(int framerate, int nchannels, int sampwidth)
{
pcm_player *player;
int retval, format, buffsz;
char *buff, *devname;
snd_pcm_t *pcm_handle;
snd_pcm_stream_t stream;
snd_pcm_hw_params_t *hwparams;
snd_pcm_uframes_t periodsize;
// check parameters
if(nchannels != 1 && nchannels != 2) {
fprintf(stderr, "error: unsupported channels: %d\n", nchannels);
return NULL;
}
if(sampwidth == 1)
format = SND_PCM_FORMAT_U8;
else if(sampwidth == 2)
format = SND_PCM_FORMAT_S16_LE;
else if(sampwidth == 3)
format = SND_PCM_FORMAT_S24_LE;
else if(sampwidth == 4)
format = SND_PCM_FORMAT_S32_LE;
else {
fprintf(stderr, "error: unsupported sample width: %d\n", sampwidth);
return NULL;
}
// allocate the structure
player = (pcm_player*)malloc(sizeof(pcm_player));
if(player == NULL)
return NULL;
// open the PCM device in playback mode
devname = "default";
stream = SND_PCM_STREAM_PLAYBACK;
if((retval = snd_pcm_open(&pcm_handle, devname, stream, 0)) < 0) {
fprintf(stderr, "error: can't PCM device: %s\n", snd_strerror(retval));
free(player);
return NULL;
}
// allocate parameters object and fill it with default values
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_hw_params_any(pcm_handle, hwparams);
// set parameters
if((retval = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
fprintf(stderr, "error: can't set interleaved mode: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
if ((retval = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format)) < 0) {
fprintf(stderr, "error: can't set format: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
if ((retval = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, nchannels)) < 0) {
fprintf(stderr, "error: can't set channels: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
if ((retval = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &framerate, 0)) < 0) {
fprintf(stderr, "error: can't set rate: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
periodsize = framerate / 10;
if((retval = snd_pcm_hw_params_set_period_size(pcm_handle, hwparams, periodsize, 0)) < 0) {
fprintf(stderr, "error: can't set period size: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
// write parameters
if ((retval = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
fprintf(stderr, "error: can't set hardware parameters: %s\n", snd_strerror(retval));
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
// resume information
printf("PCM name: %s\n", snd_pcm_name(pcm_handle));
snd_pcm_hw_params_get_channels(hwparams, &nchannels);
printf("channels: %i ", nchannels);
if (nchannels == 1)
printf("(mono)\n");
else if (nchannels == 2)
printf("(stereo)\n");
snd_pcm_hw_params_get_rate(hwparams, &framerate, 0);
printf("framerate: %d Hz\n", framerate);
// allocate buffer to hold single period
snd_pcm_hw_params_get_period_size(hwparams, &periodsize, 0);
printf("period size: %d\n", periodsize);
buffsz = sampwidth * nchannels * periodsize;
printf("buffer size: %d\n", buffsz);
buff = (char*)malloc(buffsz);
if(buff == NULL) {
fprintf(stderr, "error: can't allocate pcm buffer\n");
snd_pcm_close(pcm_handle);
free(player);
return NULL;
}
// set player attributes
player->pcm_handle = pcm_handle;
player->framerate = framerate;
player->nchannels = nchannels;
player->sampwidth = sampwidth;
player->periodsize = periodsize;
player->buffersize = buffsz;
player->buffer = buff;
return player;
}
bool open()
{
// Open the Alsa playback device.
int err=-1,count=0;
unsigned int freakuency = frequency;
while((count < 5) && (err < 0)) {
err = snd_pcm_open
( &handle, ALSA_OUTPUT_NAME, SND_PCM_STREAM_PLAYBACK, 0 );
if(err < 0) {
count++;
qWarning()<<"QAudioOutput::open() err="<<err<<", count="<<count;
}
}
if (( err < 0)||(handle == 0)) {
qWarning( "QAudioOuput: snd_pcm_open: error %d", err );
return false;
}
snd_pcm_nonblock( handle, 0 );
// Set the desired HW parameters.
snd_pcm_hw_params_t *hwparams;
snd_pcm_hw_params_alloca( &hwparams );
err = snd_pcm_hw_params_any( handle, hwparams );
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_any: err %d", err);
return false;
}
err = snd_pcm_hw_params_set_access( handle, hwparams, access );
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_access: err %d", err);
return false;
}
err = snd_pcm_hw_params_set_format( handle, hwparams,
( bitsPerSample == 16 ? SND_PCM_FORMAT_S16
: SND_PCM_FORMAT_U8 ) );
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_format: err %d", err);
return false;
}
err = snd_pcm_hw_params_set_channels
( handle, hwparams, (unsigned int)channels );
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_channels: err %d", err);
return false;
}
err = snd_pcm_hw_params_set_rate_near
( handle, hwparams, &freakuency, 0 );
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_rate_near: err %d", err);
return false;
}
#ifndef ALSA_BUFFER_SIZE
err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err %d",err);
}
err = snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_get_buffer_size: err %d",err);
}
#else
buffer_size = ALSA_BUFFER_SIZE;
err = snd_pcm_hw_params_set_buffer_size_near(handle, hwparams, &buffer_size);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_buffer_time_near: err %d",err);
}
#endif
#ifndef ALSA_PERIOD_SIZE
period_time = buffer_time/4;
err = snd_pcm_hw_params_set_period_time_near(handle, hwparams, &period_time, 0);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_period_time_near: err %d",err);
}
#else
period_size = ALSA_PERIOD_SIZE;
err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_size, 0);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params_set_period_size_near: err %d",err);
}
#endif
err = snd_pcm_hw_params(handle, hwparams);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_hw_params: err %d", err);
return false;
}
int dir;
unsigned int vval, vval2;
snd_pcm_access_t val;
snd_pcm_format_t fval;
snd_pcm_subformat_t sval;
qLog(QAudioOutput) << "PCM handle name =" << snd_pcm_name(handle);
qLog(QAudioOutput) << "PCM state =" << snd_pcm_state_name(snd_pcm_state(handle));
snd_pcm_hw_params_get_access(hwparams,&val);
vval = (unsigned int)val;
if ( (int)vval != (int)access ) {
qWarning( "QAudioInput: access type not set, want %s got %s",
snd_pcm_access_name((snd_pcm_access_t)access),
snd_pcm_access_name((snd_pcm_access_t)vval) );
access = (snd_pcm_access_t)vval;
}
qLog(QAudioOutput) << "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 ) {
qWarning( "QAudioInput: format type not set, want %s got %s",
snd_pcm_format_name((snd_pcm_format_t)format),
snd_pcm_format_name((snd_pcm_format_t)vval) );
format = (snd_pcm_format_t)vval;
}
qLog(QAudioOutput) << 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(QAudioOutput) << 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 ) {
qWarning( "QAudioInput: channels type not set, want %d got %d",channels,vval);
channels = vval;
}
qLog(QAudioOutput) << "channels =" << vval;
snd_pcm_hw_params_get_rate(hwparams, &vval, &dir);
if ( (int)vval != (int)frequency ) {
qWarning( "QAudioInput: frequency type not set, want %d got %d",frequency,vval);
frequency = vval;
}
qLog(QAudioOutput) << "rate =" << vval << "bps";
snd_pcm_hw_params_get_period_time(hwparams,&period_time, &dir);
qLog(QAudioOutput) << "period time =" << period_time << "us";
snd_pcm_hw_params_get_period_size(hwparams,&period_size, &dir);
qLog(QAudioOutput) << "period size =" << (int)period_size << "frames";
qLog(QAudioOutput) << "buffer time =" << (int)buffer_time << "us";
qLog(QAudioOutput) << "buffer size =" << (int)buffer_size << "frames";
snd_pcm_hw_params_get_periods(hwparams, &vval, &dir);
periods = vval;
qLog(QAudioOutput) << "periods per buffer =" << vval << "frames";
snd_pcm_hw_params_get_rate_numden(hwparams, &vval, &vval2);
qLog(QAudioOutput) << QString("exact rate = %1/%2 bps").arg(vval).arg(vval2).toLatin1().constData();
vval = snd_pcm_hw_params_get_sbits(hwparams);
qLog(QAudioOutput) << "significant bits =" << vval;
vval = snd_pcm_hw_params_is_batch(hwparams);
qLog(QAudioOutput) << "is batch =" << vval;
vval = snd_pcm_hw_params_is_block_transfer(hwparams);
qLog(QAudioOutput) << "is block transfer =" << vval;
vval = snd_pcm_hw_params_is_double(hwparams);
qLog(QAudioOutput) << "is double =" << vval;
vval = snd_pcm_hw_params_is_half_duplex(hwparams);
qLog(QAudioOutput) << "is half duplex =" << vval;
vval = snd_pcm_hw_params_is_joint_duplex(hwparams);
qLog(QAudioOutput) << "is joint duplex =" << vval;
vval = snd_pcm_hw_params_can_overrange(hwparams);
qLog(QAudioOutput) << "can overrange =" << vval;
vval = snd_pcm_hw_params_can_mmap_sample_resolution(hwparams);
qLog(QAudioOutput) << "can mmap =" << vval;
vval = snd_pcm_hw_params_can_pause(hwparams);
qLog(QAudioOutput) << "can pause =" << vval;
vval = snd_pcm_hw_params_can_resume(hwparams);
qLog(QAudioOutput) << "can resume =" << vval;
vval = snd_pcm_hw_params_can_sync_start(hwparams);
qLog(QAudioOutput) << "can sync start =" << vval;
// Set the desired SW parameters.
snd_pcm_sw_params_t *swparams;
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_sw_params_current(handle, swparams);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_sw_params_current: err %d",err);
}
err = snd_pcm_sw_params_set_start_threshold(handle,swparams,buffer_size);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_sw_params_set_start_threshold: err %d",err);
}
err = snd_pcm_sw_params_set_stop_threshold(handle,swparams,buffer_size);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_sw_params_set_stop_threshold: err %d",err);
}
err = snd_pcm_sw_params_set_avail_min(handle, swparams,period_size);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_sw_params_set_avail_min: err %d",err);
}
err = snd_pcm_sw_params(handle, swparams);
if ( err < 0 ) {
qWarning( "QAudioOutput: snd_pcm_sw_params: err %d",err);
}
// Prepare for audio output.
snd_pcm_prepare( handle );
return true;
}
static void set_params(void)
{
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
int err;
size_t n;
unsigned int rate;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
error("Broken configuration for this PCM: no configurations available");
exit(EXIT_FAILURE);
}
if (mmap_flag) {
snd_pcm_access_mask_t *mask = alloca(snd_pcm_access_mask_sizeof());
snd_pcm_access_mask_none(mask);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_INTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
snd_pcm_access_mask_set(mask, SND_PCM_ACCESS_MMAP_COMPLEX);
err = snd_pcm_hw_params_set_access_mask(handle, params, mask);
} else if (interleaved)
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
else
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_NONINTERLEAVED);
if (err < 0) {
error("Access type not available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
if (err < 0) {
error("Sample format non available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
if (err < 0) {
error("Channels count non available");
exit(EXIT_FAILURE);
}
#if 0
err = snd_pcm_hw_params_set_periods_min(handle, params, 2);
assert(err >= 0);
#endif
rate = hwparams.rate;
err = snd_pcm_hw_params_set_rate_near(handle, params, &hwparams.rate, 0);
assert(err >= 0);
if ((float)rate * 1.05 < hwparams.rate || (float)rate * 0.95 > hwparams.rate) {
if (!quiet_mode) {
char plugex[64];
const char *pcmname = snd_pcm_name(handle);
fprintf(stderr, "Warning: rate is not accurate (requested = %iHz, got = %iHz)\n", rate, hwparams.rate);
if (! pcmname || strchr(snd_pcm_name(handle), ':'))
*plugex = 0;
else
snprintf(plugex, sizeof(plugex), "(-Dplug:%s)",
snd_pcm_name(handle));
fprintf(stderr, " please, try the plug plugin %s\n",
plugex);
}
}
rate = hwparams.rate;
if (buffer_time == 0 && buffer_frames == 0) {
err = snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0);
assert(err >= 0);
if (buffer_time > 500000)
buffer_time = 500000;
}
if (period_time == 0 && period_frames == 0) {
if (buffer_time > 0)
period_time = buffer_time / 4;
else
period_frames = buffer_frames / 4;
}
if (period_time > 0)
err = snd_pcm_hw_params_set_period_time_near(handle, params,
&period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(handle, params,
&period_frames, 0);
assert(err >= 0);
if (buffer_time > 0) {
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&buffer_time, 0);
} else {
err = snd_pcm_hw_params_set_buffer_size_near(handle, params,
&buffer_frames);
}
assert(err >= 0);
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
error("Unable to install hw params:");
snd_pcm_hw_params_dump(params, log);
exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
if (chunk_size == buffer_size) {
error("Can't use period equal to buffer size (%lu == %lu)",
chunk_size, buffer_size);
exit(EXIT_FAILURE);
}
snd_pcm_sw_params_current(handle, swparams);
if (avail_min < 0)
n = chunk_size;
else
n = (double) rate * avail_min / 1000000;
err = snd_pcm_sw_params_set_avail_min(handle, swparams, n);
if (err < 0) {
error("Setting sw params failed\n");
}
/* round up to closest transfer boundary */
n = buffer_size;
if (start_delay <= 0) {
start_threshold = n + (double) rate * start_delay / 1000000;
} else
start_threshold = (double) rate * start_delay / 1000000;
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err >= 0);
if (stop_delay <= 0)
stop_threshold = buffer_size + (double) rate * stop_delay / 1000000;
else
stop_threshold = (double) rate * stop_delay / 1000000;
err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
assert(err >= 0);
if (snd_pcm_sw_params(handle, swparams) < 0) {
error("unable to install sw params:");
snd_pcm_sw_params_dump(swparams, log);
exit(EXIT_FAILURE);
}
if (verbose)
snd_pcm_dump(handle, log);
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
audiobuf = realloc(audiobuf, chunk_bytes);
if (audiobuf == NULL) {
error("not enough memory");
exit(EXIT_FAILURE);
}
// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
/* stereo VU-meter isn't always available... */
if (vumeter == VUMETER_STEREO) {
if (hwparams.channels != 2 || !interleaved || verbose > 2)
vumeter = VUMETER_MONO;
}
/* show mmap buffer arragment */
if (mmap_flag && verbose) {
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset;
int i;
err = snd_pcm_mmap_begin(handle, &areas, &offset, &chunk_size);
if (err < 0) {
error("snd_pcm_mmap_begin problem: %s", snd_strerror(err));
exit(EXIT_FAILURE);
}
for (i = 0; i < hwparams.channels; i++)
fprintf(stderr, "mmap_area[%i] = %p,%u,%u (%u)\n", i, areas[i].addr, areas[i].first, areas[i].step, snd_pcm_format_physical_width(hwparams.format));
/* not required, but for sure */
snd_pcm_mmap_commit(handle, offset, 0);
}
buffer_frames = buffer_size; /* for position test */
}
bool CAESinkALSA::Initialize(AEAudioFormat &format, std::string &device)
{
m_initDevice = device;
m_initFormat = format;
/* if we are raw, correct the data format */
if (AE_IS_RAW(format.m_dataFormat))
{
m_channelLayout = GetChannelLayout(format);
format.m_dataFormat = AE_FMT_S16NE;
m_passthrough = true;
}
else
{
m_channelLayout = GetChannelLayout(format);
m_passthrough = false;
}
if (m_channelLayout.Count() == 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - Unable to open the requested channel layout");
return false;
}
format.m_channelLayout = m_channelLayout;
AEDeviceType devType = AEDeviceTypeFromName(device);
std::string AESParams;
/* digital interfaces should have AESx set, though in practice most
* receivers don't care */
if (m_passthrough || devType == AE_DEVTYPE_HDMI || devType == AE_DEVTYPE_IEC958)
GetAESParams(format, AESParams);
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Attempting to open device \"%s\"", device.c_str());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
snd_config_t *dmixRateConf;
long dmixRate;
if (snd_config_search(config, "defaults.pcm.dmix.rate", &dmixRateConf) < 0
|| snd_config_get_integer(dmixRateConf, &dmixRate) < 0)
dmixRate = 48000; /* assume default */
/* Prefer dmix for non-passthrough stereo when sample rate matches */
if (!OpenPCMDevice(device, AESParams, m_channelLayout.Count(), &m_pcm, config, format.m_sampleRate == dmixRate && !m_passthrough))
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - failed to initialize device \"%s\"", device.c_str());
snd_config_delete(config);
return false;
}
/* get the actual device name that was used */
device = snd_pcm_name(m_pcm);
m_device = device;
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Opened device \"%s\"", device.c_str());
/* free the sound config */
snd_config_delete(config);
if (!InitializeHW(format) || !InitializeSW(format))
return false;
snd_pcm_nonblock(m_pcm, 1);
snd_pcm_prepare (m_pcm);
m_format = format;
m_formatSampleRateMul = 1.0 / (double)m_format.m_sampleRate;
return true;
}
int main( int argc, char *argv[] )
{
struct structArgs cmdArgs;
unsigned int val, val2;
int dir;
int errNum;
cmdArgs.card = 0; // Default card.
cmdArgs.control = 1; // Default control.
// ************************************************************************
// ALSA control elements.
// ************************************************************************
snd_pcm_t *pcmp;
snd_pcm_hw_params_t *params;
// snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
snd_pcm_stream_t stream = SND_PCM_STREAM_CAPTURE;
snd_pcm_uframes_t frames;
// ************************************************************************
// Get command line parameters.
// ************************************************************************
argp_parse( &argp, argc, argv, 0, 0, &cmdArgs );
printf( "Card = %i\n", cmdArgs.card );
printf( "Control = %i\n", cmdArgs.control );
sprintf( cmdArgs.deviceID, "hw:%i,%i", cmdArgs.card, cmdArgs.control );
printf( "Using device %s :", cmdArgs.deviceID );
/* Allocate a hardware parameters object. */
if ( snd_pcm_hw_params_alloca( ¶ms ) < 0 )
{
fprintf( stderr, "Unable to allocate.\n" );
return -1;
}
/* Open PCM device for playback. */
// if ( snd_pcm_open( &pcmp, cmdArgs.deviceID, stream, 0 ) < 0 )
// {
// fprintf( stderr, "Unable to open pcm device.\n" );
// return -1;
// }
/* Fill it in with default values. */
// if ( snd_pcm_hw_params_any( pcmp, params ) < 0
// {
// fprintf( stderr, "Unable to set default values.\n" );
// return -1;
// }
/* Interleaved mode */
// snd_pcm_hw_params_set_access( pcmp, params,
// SND_PCM_ACCESS_RW_INTERLEAVED );
/* Signed 16-bit little-endian format */
snd_pcm_hw_params_set_format( pcmp, params,
SND_PCM_FORMAT_S16_LE );
/* Two channels (stereo) */
snd_pcm_hw_params_set_channels( pcmp, params, 2 );
/* 44100 bits/second sampling rate (CD quality) */
val = 44100;
snd_pcm_hw_params_set_rate_near( pcmp, params, &val, &dir );
/* Write the parameters to the driver */
errNum = snd_pcm_hw_params( pcmp, params );
if ( errNum < 0 )
{
fprintf(stderr, "unable to set hw parameters: %s\n",
snd_strerror( errNum ));
exit( 1 );
}
/* Display information about the PCM interface */
printf( "PCM handle name = '%s'\n", snd_pcm_name( pcmp ));
printf("PCM state = %s\n", snd_pcm_state_name( snd_pcm_state( pcmp )));
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 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 );
// 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( pcmp );
return 0;
}
int init_alsa(void)
{
list_cards();
// open PCM device for recording
rc = snd_pcm_open(&handle, "default", SND_PCM_STREAM_CAPTURE, 0);
if (rc < 0)
{
printf("Unable to open pcm device: %s\n", snd_strerror(rc));
return 1;
}
else
printf("Using %s\n", snd_pcm_name(handle));
// allocate a hardware parameter object
snd_pcm_hw_params_alloca(¶ms);
if (rc < 0)
{
printf("Unable to configure this PCM device\n");
return 1;
}
// fill it with default values
snd_pcm_hw_params_any(handle, params);
//
// set the desired hardware parameters
//
// interleaved mode
rc = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
if (rc < 0)
{
printf("Unable to set interleaved mode\n");
return 1;
}
// signed 16-bit little-endian format
rc = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
if (rc < 0)
{
printf("Unable to set format\n");
return 1;
}
// two channel stereo
rc = snd_pcm_hw_params_set_channels(handle, params, 2);
if (rc < 0)
{
printf("Unable to set to two channel stereo\n");
return 1;
}
// 44100 bits/second sample rate
unsigned int exact_rate = rate;
rc = snd_pcm_hw_params_set_rate_near(handle, params, &exact_rate, 0);
if (rc < 0)
{
printf("Error setting rate\n");
return 1;
}
if (rate != exact_rate)
{
printf("%d Hz not supported. Using %d Hz instead", rate, exact_rate);
}
// set period size to 32 frames
rc = snd_pcm_hw_params_set_period_size_near(handle, params, &frames, &dir);
if (rc < 0)
{
printf("Error setting period size\n");
return 1;
}
// write the parameters to the driver
rc = snd_pcm_hw_params(handle, params);
if (rc < 0)
{
printf("Unable to set hw parameters: %s\n", snd_strerror(rc));
return 1;
}
size = frames * 4; // 2 bytes / sample, 2 channels
buffer = (unsigned char *) malloc(size);
printf("Frames: %d\n", (int)frames);
printf("Allocating buffer of size: %d\n", size);
snd_pcm_hw_params_get_period_time(params, &rate, &dir);
return 0;
}
bool CAESinkALSA::Initialize(AEAudioFormat &format, std::string &device)
{
CAEChannelInfo channelLayout;
m_initDevice = device;
m_initFormat = format;
/* if we are raw, correct the data format */
if (AE_IS_RAW(format.m_dataFormat))
{
channelLayout = GetChannelLayout(format);
format.m_dataFormat = AE_FMT_S16NE;
m_passthrough = true;
}
else
{
channelLayout = GetChannelLayout(format);
m_passthrough = false;
}
#if defined(HAS_LIBAMCODEC)
if (aml_present())
{
aml_set_audio_passthrough(m_passthrough);
device = "default";
}
#endif
if (channelLayout.Count() == 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - Unable to open the requested channel layout");
return false;
}
format.m_channelLayout = channelLayout;
AEDeviceType devType = AEDeviceTypeFromName(device);
std::string AESParams;
/* digital interfaces should have AESx set, though in practice most
* receivers don't care */
if (m_passthrough || devType == AE_DEVTYPE_HDMI || devType == AE_DEVTYPE_IEC958)
GetAESParams(format, AESParams);
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Attempting to open device \"%s\"", device.c_str());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
if (!OpenPCMDevice(device, AESParams, channelLayout.Count(), &m_pcm, config))
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - failed to initialize device \"%s\"", device.c_str());
snd_config_delete(config);
return false;
}
/* get the actual device name that was used */
device = snd_pcm_name(m_pcm);
m_device = device;
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Opened device \"%s\"", device.c_str());
/* free the sound config */
snd_config_delete(config);
if (!InitializeHW(format) || !InitializeSW(format))
return false;
// we want it blocking
snd_pcm_nonblock(m_pcm, 0);
snd_pcm_prepare (m_pcm);
m_format = format;
m_formatSampleRateMul = 1.0 / (double)m_format.m_sampleRate;
return true;
}
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;
}
static int init_audio_device(common_data_t *p_common_data)
{
int ret;
int dir = 0;
unsigned int val;
snd_pcm_hw_params_t *p_params;
snd_pcm_uframes_t buffer_size;
unsigned int buffer_time;
unsigned int period_time;
snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
size_t bits_per_sample;
size_t bits_per_frame;
ret = snd_pcm_open(&p_common_data->handle, "plughw:0,0", SND_PCM_STREAM_PLAYBACK, 0);
if (ret < 0) {
dbg_alsa("unable to open pcm device: %s\n", snd_strerror(ret));
return -1;
}
snd_pcm_hw_params_alloca(&p_params);
snd_pcm_hw_params_any(p_common_data->handle, p_params);
snd_pcm_hw_params_set_access(p_common_data->handle, p_params, SND_PCM_ACCESS_RW_INTERLEAVED);
snd_pcm_hw_params_set_format(p_common_data->handle, p_params, SND_PCM_FORMAT_S16_LE);
snd_pcm_hw_params_set_channels(p_common_data->handle, p_params, 2);
val = 44100;
snd_pcm_hw_params_set_rate_near(p_common_data->handle, p_params, &val, &dir);
snd_pcm_hw_params_get_buffer_time_max(p_params, &buffer_time, 0);
// if (buffer_time > 500000)
// buffer_time = 500000;
//
// period_time = buffer_time / 4;
//
// snd_pcm_hw_params_set_period_time_near(p_common_data->handle, p_params, &period_time, 0);
// snd_pcm_hw_params_set_buffer_time_near(p_common_data->handle, p_params, &buffer_time, 0);
p_common_data->period_size = 2048;
snd_pcm_hw_params_set_period_size_near(p_common_data->handle, p_params, &p_common_data->period_size, &dir);
ret = snd_pcm_hw_params(p_common_data->handle, p_params);
if (ret < 0){
dbg_alsa("unable to set hw parameters: %s\n", snd_strerror(ret));
exit(1);
}
ret = snd_pcm_state(p_common_data->handle);
dbg("state is %d\n", ret);
snd_pcm_hw_params_get_period_size(p_params, &p_common_data->period_size, &dir);
snd_pcm_hw_params_get_buffer_size(p_params, &buffer_size);
if (p_common_data->period_size == buffer_size) {
dbg_alsa("Can't use period size equal to buffer size (%lu == %lu)\n", p_common_data->period_size, buffer_size);
}
dbg("period size is : %lu frames\n", p_common_data->period_size);
dbg("buffer size is : %lu frames\n", buffer_size);
bits_per_sample = snd_pcm_format_physical_width(format);
bits_per_frame = bits_per_sample * 2;
p_common_data->chunk_bytes = p_common_data->period_size * bits_per_frame / 8;
//g_buf = (msg_t *)malloc(sizeof(msg_t)+(char)p_common_data->chunk_bytes);
dbg("sample rate is %d\n", val);
dbg("bits_per_sample %d\n", bits_per_sample);
dbg("bits_per_frame %d\n", bits_per_frame);
dbg("chunk_bytes %d\n", p_common_data->chunk_bytes);
dbg("PCM handle name = '%s'\n",snd_pcm_name(p_common_data->handle));
return 0;
}
int record(int size,char *serverString)
{
unsigned int pcm, tmp, dir;
int rate, channels, seconds;
snd_pcm_t *pcm_handle;
snd_pcm_hw_params_t *params;
snd_pcm_uframes_t frames;
char *buff,*buf;
int buff_size, loops;
int fp;
/*if (argc < 4)
{
printf("Usage: %s <sample_rate> <channels> <seconds>\n",
argv[0]);
return -1;
}*/
rate = 8000;//atoi(argv[1]);
channels = 1;//atoi(argv[2]);
seconds = 10;//atoi(argv[3]);
/* Open the PCM device in playback mode */
if (pcm = snd_pcm_open(&pcm_handle, "default" , SND_PCM_STREAM_PLAYBACK, 0) < 0)
printf("ERROR: Can't open \"%s\" PCM device. %s\n", "default", snd_strerror(pcm));
/* Allocate parameters object and fill it with default values*/
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_hw_params_any(pcm_handle, params);
/* Set parameters */
if (pcm = snd_pcm_hw_params_set_access(pcm_handle, params,SND_PCM_ACCESS_RW_INTERLEAVED) < 0)
printf("ERROR: Can't set interleaved mode. %s\n", snd_strerror(pcm));
if (pcm = snd_pcm_hw_params_set_format(pcm_handle, params,SND_PCM_FORMAT_U8) < 0)
printf("ERROR: Can't set format. %s\n", snd_strerror(pcm));
if (pcm = snd_pcm_hw_params_set_channels(pcm_handle, params, channels) < 0)
printf("ERROR: Can't set channels number. %s\n", snd_strerror(pcm));
if (pcm = snd_pcm_hw_params_set_rate_near(pcm_handle, params, &rate, 0) < 0)
printf("ERROR: Can't set rate. %s\n", snd_strerror(pcm));
/* Write parameters */
if (pcm = snd_pcm_hw_params(pcm_handle, params) < 0)
printf("ERROR: Can't set harware parameters. %s\n", snd_strerror(pcm));
/* Resume information */
printf("PCM name: '%s'\n", snd_pcm_name(pcm_handle));
printf("PCM state: %s\n", snd_pcm_state_name(snd_pcm_state(pcm_handle)));
snd_pcm_hw_params_get_channels(params, &tmp);
printf("channels: %i ", tmp);
if (tmp == 1)
printf("(mono)\n");
else if (tmp == 2)
printf("(stereo)\n");
snd_pcm_hw_params_get_rate(params, &tmp, 0);
printf("rate: %d bps\n", tmp);
printf("seconds: %d\n", seconds);
/* Allocate buffer to hold single period */
snd_pcm_hw_params_get_period_size(params, &frames, 0);
buff_size = frames * channels * 2 /* 2 -> sample size */;
buff = (char *) malloc(buff_size*3);
size = frames * channels * 2 /* 2 -> sample size */;
buf = (char *) realloc((void*)serverString,(size*3));
snd_pcm_hw_params_get_period_time(params, &tmp, NULL);
//fp=open("222.wav",O_RDONLY);
for (loops = (seconds * 1000000) / tmp; loops > 0; loops--)
{
/*
if (pcm = read(fp, buff, buff_size) == 0)
{
printf("Early end of file.\n");
//return 0;
}
*/
if (pcm = snd_pcm_writei(pcm_handle, buf, frames) == -EPIPE)
{
printf("XRUN.\n");
snd_pcm_prepare(pcm_handle);
}
else
if(pcm < 0)
{
printf("ERROR. Can't write to PCM device. %s\n", snd_strerror(pcm));
}
}
snd_pcm_drain(pcm_handle);
snd_pcm_close(pcm_handle);
free(buff);
return 0;
}
static int set_snd_pcm_params(struct bat *bat, struct pcm_container *sndpcm)
{
snd_pcm_hw_params_t *params;
unsigned int buffer_time = 0;
unsigned int period_time = 0;
unsigned int rate;
int err;
const char *device_name = snd_pcm_name(sndpcm->handle);
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(¶ms);
/* Fill it in with default values. */
err = snd_pcm_hw_params_any(sndpcm->handle, params);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("default params: %s: %s(%d)\n"),
device_name, snd_strerror(err), err);
return err;
}
/* Set access mode */
err = snd_pcm_hw_params_set_access(sndpcm->handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("access type: %s: %s(%d)\n"),
device_name, snd_strerror(err), err);
return err;
}
/* Set format */
err = snd_pcm_hw_params_set_format(sndpcm->handle, params, bat->format);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("PCM format: %d %s: %s(%d)\n"),
bat->format,
device_name, snd_strerror(err), err);
return err;
}
/* Set channels */
err = snd_pcm_hw_params_set_channels(sndpcm->handle,
params, bat->channels);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("channel number: %d %s: %s(%d)\n"),
bat->channels,
device_name, snd_strerror(err), err);
return err;
}
/* Set sampling rate */
rate = bat->rate;
err = snd_pcm_hw_params_set_rate_near(sndpcm->handle,
params, &bat->rate,
0);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("sample rate: %d %s: %s(%d)\n"),
bat->rate,
device_name, snd_strerror(err), err);
return err;
}
if ((float) rate * (1 + RATE_RANGE) < bat->rate
|| (float) rate * (1 - RATE_RANGE) > bat->rate) {
fprintf(bat->err, _("Invalid parameters: sample rate: "));
fprintf(bat->err, _("requested %dHz, got %dHz\n"),
rate, bat->rate);
return -EINVAL;
}
if (snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0) < 0) {
fprintf(bat->err, _("Get parameter from device error: "));
fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"),
buffer_time,
device_name, snd_strerror(err), err);
return -EINVAL;
}
if (buffer_time > MAX_BUFFERTIME)
buffer_time = MAX_BUFFERTIME;
period_time = buffer_time / DIV_BUFFERTIME;
/* Set buffer time and period time */
err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, params,
&buffer_time, 0);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("buffer time: %d %s: %s(%d)\n"),
buffer_time,
device_name, snd_strerror(err), err);
return err;
}
err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, params,
&period_time, 0);
if (err < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("period time: %d %s: %s(%d)\n"),
period_time,
device_name, snd_strerror(err), err);
return err;
}
/* Write the parameters to the driver */
if (snd_pcm_hw_params(sndpcm->handle, params) < 0) {
fprintf(bat->err, _("Set parameter to device error: "));
fprintf(bat->err, _("hw params: %s: %s(%d)\n"),
device_name, snd_strerror(err), err);
return -EINVAL;
}
err = snd_pcm_hw_params_get_period_size(params,
&sndpcm->period_size, 0);
if (err < 0) {
fprintf(bat->err, _("Get parameter from device error: "));
fprintf(bat->err, _("period size: %lu %s: %s(%d)\n"),
sndpcm->period_size,
device_name, snd_strerror(err), err);
return err;
}
err = snd_pcm_hw_params_get_buffer_size(params, &sndpcm->buffer_size);
if (err < 0) {
fprintf(bat->err, _("Get parameter from device error: "));
fprintf(bat->err, _("buffer size: %lu %s: %s(%d)\n"),
sndpcm->buffer_size,
device_name, snd_strerror(err), err);
return err;
}
if (sndpcm->period_size == sndpcm->buffer_size) {
fprintf(bat->err, _("Invalid parameters: can't use period "));
fprintf(bat->err, _("equal to buffer size (%lu)\n"),
sndpcm->period_size);
return -EINVAL;
}
err = snd_pcm_format_physical_width(bat->format);
if (err < 0) {
fprintf(bat->err, _("Invalid parameters: "));
fprintf(bat->err, _("snd_pcm_format_physical_width: %d\n"),
err);
return err;
}
sndpcm->sample_bits = err;
sndpcm->frame_bits = sndpcm->sample_bits * bat->channels;
/* Calculate the period bytes */
sndpcm->period_bytes = sndpcm->period_size * sndpcm->frame_bits / 8;
sndpcm->buffer = (char *) malloc(sndpcm->period_bytes);
if (sndpcm->buffer == NULL) {
fprintf(bat->err, _("Not enough memory: size=%zd\n"),
sndpcm->period_bytes);
return -ENOMEM;
}
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;
}
static int set_snd_pcm_params(struct bat *bat, struct snd_pcm_container *sndpcm)
{
snd_pcm_format_t format;
snd_pcm_hw_params_t *params;
unsigned int buffer_time = 0;
unsigned int period_time = 0;
unsigned int rate;
int err;
const char *device_name = snd_pcm_name(sndpcm->handle);
/* Allocate a hardware parameters object. */
snd_pcm_hw_params_alloca(¶ms);
/* Fill it in with default values. */
err = snd_pcm_hw_params_any(sndpcm->handle, params);
if (err < 0) {
loge(E_SETDEV S_DEFAULT, "%s: %s(%d)",
device_name, snd_strerror(err), err);
goto fail_exit;
}
/* Set access mode */
err = snd_pcm_hw_params_set_access(sndpcm->handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
loge(E_SETDEV S_ACCESS, "%s: %s(%d)",
device_name, snd_strerror(err), err);
goto fail_exit;
}
/* Set format */
switch (bat->sample_size) {
case 1:
format = SND_PCM_FORMAT_S8;
break;
case 2:
format = SND_PCM_FORMAT_S16_LE;
break;
case 3:
format = SND_PCM_FORMAT_S24_3LE;
break;
case 4:
format = SND_PCM_FORMAT_S32_LE;
break;
default:
loge(E_PARAMS S_PCMFORMAT, "size=%d", bat->sample_size);
goto fail_exit;
}
err = snd_pcm_hw_params_set_format(sndpcm->handle, params, format);
if (err < 0) {
loge(E_SETDEV S_PCMFORMAT, "%d %s: %s(%d)",
format,
device_name, snd_strerror(err), err);
goto fail_exit;
}
/* Set channels */
err = snd_pcm_hw_params_set_channels(sndpcm->handle,
params, bat->channels);
if (err < 0) {
loge(E_SETDEV S_CHANNELS, "%d %s: %s(%d)",
bat->channels,
device_name, snd_strerror(err), err);
goto fail_exit;
}
/* Set sampling rate */
rate = bat->rate;
err = snd_pcm_hw_params_set_rate_near(sndpcm->handle,
params, &bat->rate,
0);
if (err < 0) {
loge(E_SETDEV S_SAMPLERATE, "%d %s: %s(%d)",
bat->rate,
device_name, snd_strerror(err), err);
goto fail_exit;
}
if ((float) rate * 1.05 < bat->rate
|| (float) rate * 0.95 > bat->rate) {
loge(E_PARAMS S_SAMPLERATE, "requested %dHz, got %dHz",
rate, bat->rate);
goto fail_exit;
}
if (snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0) < 0) {
loge(E_GETDEV S_BUFFERTIME, "%d %s: %s(%d)",
buffer_time,
device_name, snd_strerror(err), err);
goto fail_exit;
}
if (buffer_time > 500000)
buffer_time = 500000;
/* Was 4, changed to 8 to remove reduce capture overrun */
period_time = buffer_time / 8;
/* Set buffer time and period time */
err = snd_pcm_hw_params_set_buffer_time_near(sndpcm->handle, params,
&buffer_time, 0);
if (err < 0) {
loge(E_SETDEV S_BUFFERTIME, "%d %s: %s(%d)",
buffer_time,
device_name, snd_strerror(err), err);
goto fail_exit;
}
err = snd_pcm_hw_params_set_period_time_near(sndpcm->handle, params,
&period_time, 0);
if (err < 0) {
loge(E_SETDEV S_PERIODTIME, "%d %s: %s(%d)",
period_time,
device_name, snd_strerror(err), err);
goto fail_exit;
}
/* Write the parameters to the driver */
if (snd_pcm_hw_params(sndpcm->handle, params) < 0) {
loge(E_SETDEV S_HWPARAMS, "%s: %s(%d)",
device_name, snd_strerror(err), err);
goto fail_exit;
}
err = snd_pcm_hw_params_get_period_size(params,
&sndpcm->period_size, 0);
if (err < 0) {
loge(E_GETDEV S_PERIODSIZE, "%zd %s: %s(%d)",
sndpcm->period_size,
device_name, snd_strerror(err), err);
goto fail_exit;
}
err = snd_pcm_hw_params_get_buffer_size(params, &sndpcm->buffer_size);
if (err < 0) {
loge(E_GETDEV S_BUFFERSIZE, "%zd %s: %s(%d)",
sndpcm->buffer_size,
device_name, snd_strerror(err), err);
goto fail_exit;
}
if (sndpcm->period_size == sndpcm->buffer_size) {
loge(E_PARAMS, "can't use period equal to buffer size (%zd)",
sndpcm->period_size);
goto fail_exit;
}
err = snd_pcm_format_physical_width(format);
if (err < 0) {
loge(E_PARAMS, "snd_pcm_format_physical_width: %d", err);
goto fail_exit;
}
sndpcm->sample_bits = err;
sndpcm->frame_bits = sndpcm->sample_bits * bat->channels;
/* Calculate the period bytes */
sndpcm->period_bytes = sndpcm->period_size * sndpcm->frame_bits / 8;
sndpcm->buffer = (char *) malloc(sndpcm->period_bytes);
if (sndpcm->buffer == NULL) {
loge(E_MALLOC, "size=%zd", sndpcm->period_bytes);
goto fail_exit;
}
return 0;
fail_exit:
return -1;
}
static void set_params(void)
{
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
int err;
size_t n;
snd_pcm_uframes_t xfer_align;
unsigned int rate;
snd_pcm_uframes_t start_threshold, stop_threshold;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
error(_("Broken configuration for this PCM: no configurations available"));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
error(_("Access type not available"));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
if (err < 0) {
error(_("Sample format non available"));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
if (err < 0) {
error(_("Channels count non available"));
exit(EXIT_FAILURE);
}
#if 0
err = snd_pcm_hw_params_set_periods_min(handle, params, 2);
assert(err >= 0);
#endif
rate = hwparams.rate;
err = snd_pcm_hw_params_set_rate_near(handle, params, &hwparams.rate, 0);
assert(err >= 0);
if ((float)rate * 1.05 < hwparams.rate || (float)rate * 0.95 > hwparams.rate) {
if (!quiet_mode) {
char plugex[64];
const char *pcmname = snd_pcm_name(handle);
fprintf(stderr, _("Warning: rate is not accurate (requested = %iHz, got = %iHz)\n"), rate, hwparams.rate);
if (! pcmname || strchr(snd_pcm_name(handle), ':'))
*plugex = 0;
else
snprintf(plugex, sizeof(plugex), "(-Dplug:%s)",
snd_pcm_name(handle));
fprintf(stderr, _(" please, try the plug plugin %s\n"),
plugex);
}
}
rate = hwparams.rate;
if (buffer_time == 0 && buffer_frames == 0) {
err = snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0);
assert(err >= 0);
if (buffer_time > 500000)
buffer_time = 500000;
}
if (period_time == 0 && period_frames == 0) {
if (buffer_time > 0)
period_time = buffer_time / 4;
else
period_frames = buffer_frames / 4;
}
if (period_time > 0)
err = snd_pcm_hw_params_set_period_time_near(handle, params,
&period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(handle, params,
&period_frames, 0);
assert(err >= 0);
if (buffer_time > 0) {
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&buffer_time, 0);
} else {
err = snd_pcm_hw_params_set_buffer_size_near(handle, params,
&buffer_frames);
}
assert(err >= 0);
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
error(_("Unable to install hw params:"));
snd_pcm_hw_params_dump(params, log);
exit(EXIT_FAILURE);
}
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
if (chunk_size == buffer_size) {
error(_("Can't use period equal to buffer size (%lu == %lu)"),
chunk_size, buffer_size);
exit(EXIT_FAILURE);
}
snd_pcm_sw_params_current(handle, swparams);
err = snd_pcm_sw_params_get_xfer_align(swparams, &xfer_align);
if (err < 0) {
error(_("Unable to obtain xfer align\n"));
exit(EXIT_FAILURE);
}
if (sleep_min)
xfer_align = 1;
err = snd_pcm_sw_params_set_sleep_min(handle, swparams,
sleep_min);
assert(err >= 0);
if (avail_min < 0)
n = chunk_size;
else
n = (double) rate * avail_min / 1000000;
err = snd_pcm_sw_params_set_avail_min(handle, swparams, n);
// round up to closest transfer boundary
n = (buffer_size / xfer_align) * xfer_align;
start_threshold = n;
if (start_threshold < 1)
start_threshold = 1;
if (start_threshold > n)
start_threshold = n;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err >= 0);
stop_threshold = buffer_size;
err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
assert(err >= 0);
err = snd_pcm_sw_params_set_xfer_align(handle, swparams, xfer_align);
assert(err >= 0);
if (snd_pcm_sw_params(handle, swparams) < 0) {
error(_("unable to install sw params:"));
snd_pcm_sw_params_dump(swparams, log);
exit(EXIT_FAILURE);
}
bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_frame = bits_per_sample * hwparams.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
audiobuf = realloc(audiobuf, chunk_bytes);
if (audiobuf == NULL) {
error(_("not enough memory"));
exit(EXIT_FAILURE);
}
// fprintf(stderr, "real chunk_size = %i, frags = %i, total = %i\n", chunk_size, setup.buf.block.frags, setup.buf.block.frags * chunk_size);
}
int main() {
int rc;
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
unsigned int val, val2;
int dir;
snd_pcm_uframes_t frames;
/* Open PCM device for playback. */
rc = snd_pcm_open(&handle, "default",
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_INTERLEAVED);
/* 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, &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);
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;
}
int main()
{
int rc;
snd_pcm_t* handle;
snd_pcm_hw_params_t* params;
unsigned int val;
unsigned int val2;
int dir;
snd_pcm_uframes_t frames;
if ( (rc = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0)) < 0)
{
std::cerr << "unable to open pcm devices: " << snd_strerror(rc) << std::endl;
exit(1);
}
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_hw_params_any(handle, params);
snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
snd_pcm_hw_params_set_channels(handle, params, 2);
val = 44100;
snd_pcm_hw_params_set_rate_near(handle, params, &val, &dir);
if ( (rc = snd_pcm_hw_params(handle, params)) < 0)
{
std::cerr << "unable to set hw parameters: " << snd_strerror(rc) << std::endl;
exit(1);
}
std::cout << "PCM handle name = " << snd_pcm_name(handle) << std::endl;
std::cout << "PCM state = " << snd_pcm_state_name(snd_pcm_state(handle)) << std::endl;
snd_pcm_hw_params_get_access(params, (snd_pcm_access_t *)&val);
std::cout << "access type = " << snd_pcm_access_name((snd_pcm_access_t)val) << std::endl;
snd_pcm_hw_params_get_format(params, (snd_pcm_format_t*)(&val));
std::cout << "format = '" << snd_pcm_format_name((snd_pcm_format_t)val) << "' (" << snd_pcm_format_description((snd_pcm_format_t)val) << ")" << std::endl;
snd_pcm_hw_params_get_subformat(params, (snd_pcm_subformat_t *)&val);
std::cout << "subformat = '" <<
snd_pcm_subformat_name((snd_pcm_subformat_t)val) << "' (" << snd_pcm_subformat_description((snd_pcm_subformat_t)val) << ")" << std::endl;
snd_pcm_hw_params_get_channels(params, &val);
std::cout << "channels = " << val << std::endl;
snd_pcm_hw_params_get_rate(params, &val, &dir);
std::cout << "rate = " << val << " bps" << std::endl;
snd_pcm_hw_params_get_period_time(params, &val, &dir);
std::cout << "period time = " << val << " us" << std::endl;
snd_pcm_hw_params_get_period_size(params, &frames, &dir);
std::cout << "period size = " << static_cast<int>(frames) << " frames" << std::endl;
snd_pcm_hw_params_get_buffer_time(params, &val, &dir);
std::cout << "buffer time = " << val << " us" << std::endl;
snd_pcm_hw_params_get_buffer_size(params, (snd_pcm_uframes_t *) &val);
std::cout << "buffer size = " << val << " frames" << std::endl;
snd_pcm_hw_params_get_periods(params, &val, &dir);
std::cout << "periods per buffer = " << val << " frames" << std::endl;
snd_pcm_hw_params_get_rate_numden(params, &val, &val2);
std::cout << "exact rate = " << val/val2 << " bps" << std::endl;
val = snd_pcm_hw_params_get_sbits(params);
std::cout << "significant bits = " << val << std::endl;
snd_pcm_hw_params_get_tick_time(params, &val, &dir);
std::cout << "tick time = " << val << " us" << std::endl;
val = snd_pcm_hw_params_is_batch(params);
std::cout << "is batch = " << val << std::endl;
val = snd_pcm_hw_params_is_block_transfer(params);
std::cout << "is block transfer = " << val << std::endl;
val = snd_pcm_hw_params_is_double(params);
std::cout << "is double = " << val << std::endl;
val = snd_pcm_hw_params_is_half_duplex(params);
std::cout << "is half duplex = " << val << std::endl;
val = snd_pcm_hw_params_is_joint_duplex(params);
std::cout << "is joint duplex = " << val << std::endl;
val = snd_pcm_hw_params_can_overrange(params);
std::cout << "can overrange = " << val << std::endl;
val = snd_pcm_hw_params_can_mmap_sample_resolution(params);
std::cout << "can mmap = " << val << std::endl;
val = snd_pcm_hw_params_can_pause(params);
std::cout << "can pause = " << val << std::endl;
val = snd_pcm_hw_params_can_resume(params);
std::cout << "can resume = " << val << std::endl;
val = snd_pcm_hw_params_can_sync_start(params);
std::cout << "can sync start = " << val << std::endl;
snd_pcm_close(handle);
return 0;
}
main(int argc, char **argv){
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
snd_pcm_uframes_t frames;
//the libsamplerate stuff
SRC_DATA datastr;//holds the data(inpu and output),input frames used, output frames generated
SRC_STATE *statestr;//holds the state
int error;
//the lbsndfile stuff, one keeps the header the other the data
SF_INFO sfinf;//has all the info like total frames,samplerate, channels, mode
SNDFILE *input = NULL;
//buffers used in computation to pass to the playback function
float *buffin = NULL;//float into the converter
float *filein = NULL;
float *flangebuffout = NULL;//float to traverse the array for getting flange effects
float *flangebase = NULL;//float to fix the array for initialising the flange effects
float *buffout = NULL;//float out of the converter
short *final = NULL;//final array to write to snd card
float fldelmax = 256;
float flfreq = 1;
float flgain = .5;
int fltime = 0;
int pcm, readcount, pcmrc, blah;//pcm is used for error checking the alsa stuff, pcmrc is used in the main loop
float *eofin;//to point to the end of the file's raw data
int tmp;//used to hold information that is printed in stdio
int i = 0;//index for initialising the output DAC
// float fldelmax, flgain, flfreq;
// pointer for the file input
if (argc != 3){
printf("Usage requires music file and src ratio, please try again\n\n");
return 0;
}
char *inputname = argv[1];
//int *filein = argv[1];
input = sf_open(inputname, SFM_READ, &sfinf);
if (input == NULL){
printf("could not open file sorry \n\n");
return 0;
}
fprintf(stderr, "Channels : %d\n", sfinf.channels);
fprintf(stderr, "Sample rate; %d\n", sfinf.samplerate);
fprintf(stderr, "Sections: %d\n", sfinf.sections);
fprintf(stderr, "Format: %d\n", sfinf.format);
// fprintf(stderr, "Frame Count: %d\n", sfinf.frames);
//fprintf(stderr, "size: %d\n", sizeof(short));
//open sndcard
if ((filein = malloc(sizeof(float)*sfinf.channels*sfinf.frames)) == NULL)
{
printf("MAN YOU OUT OF MEM");
return 0;
}
blah = sf_readf_float(input, filein, sfinf.frames);
buffin = filein;
eofin = filein + (sfinf.frames)*sfinf.channels;
if (pcm =snd_pcm_open(&handle, PCM_DEVICE, SND_PCM_STREAM_PLAYBACK, 0)< 0){
printf("Error: CANNOT OPEN PCM DEVICE\n");
}
//allocate default parameters
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_hw_params_any(handle, params);
//set parameters
if (pcm = snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED)< 0){
printf("Cannot set interleaved mode\n");
}
if (pcm = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE)< 0){
printf("CANNOT SET FORMAT\n");
}
if (pcm = snd_pcm_hw_params_set_channels(handle, params, sfinf.channels)< 0){
printf("CANNOT SET CHANNELS \n");
}
if (pcm = snd_pcm_hw_params_set_rate(handle, params, sfinf.samplerate, 0)< 0){
printf("CANNOT SET SAMPLERATES \n");
}
if (pcm = snd_pcm_hw_params_set_periods(handle, params,1024, 0) < 0){
printf("CANNOT SET PERIOD TO 128");
}
//write parameters
if (pcm = snd_pcm_hw_params(handle, params)< 0){
printf("CANNOT SET HARDWARE PARAMETERS\n");
}
printf("PCm 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_channels(params, &tmp);
printf("channels: %i\n", tmp);
snd_pcm_hw_params_get_rate(params, &tmp, 0);
printf("rate: %d \n", tmp);
//find size of period on hardware
snd_pcm_hw_params_get_period_size(params, &frames, 0);
fprintf(stderr, "# frames in a period: %d\n", frames);
//buffers on buffers (buffout for float output from sample rate conversion), (final for short array to write to pcm) and flangebse for the flanger stuff
buffout = malloc(frames*sfinf.channels * sizeof(float));//frames
final = malloc(frames*sfinf.channels * sizeof(short));//frames