int main() {
int val;
printf("ALSA library version: %s\n", SND_LIB_VERSION_STR);
printf("PCM stream types:\n");
for (val = 0; val <= SND_PCM_STREAM_LAST; val++) {
printf(" %s\n", snd_pcm_stream_name((snd_pcm_stream_t)val));
}
printf("PCM access types:\n");
for (val = 0; val <= SND_PCM_ACCESS_LAST; val++) {
printf(" %s\n", snd_pcm_access_name((snd_pcm_access_t)val));
}
printf("PCM formats:\n");
for (val = 0; val <= SND_PCM_STREAM_LAST; val++) {
if (snd_pcm_format_name((snd_pcm_format_t)val) != NULL) {
printf(" %s (%s)\n",
snd_pcm_format_name((snd_pcm_format_t)val),
snd_pcm_format_description((snd_pcm_format_t)val));
}
}
printf("\nPCM subformats:\n");
for (val = 0; val <= SND_PCM_SUBFORMAT_LAST; val++) {
printf(" %s (%s)\n", snd_pcm_subformat_name((snd_pcm_subformat_t)val),
snd_pcm_subformat_description((snd_pcm_subformat_t)val));
}
return 0;
}
static int setup_pcm(snd_pcm_t *pcm, int format, int channels, int rate)
{
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(¶ms);
if (snd_pcm_hw_params_any(pcm, params) < 0) {
printf("Cannot init hw_params\n");
return -1;
}
if (format != SND_PCM_FORMAT_UNKNOWN) {
if (snd_pcm_hw_params_set_format(pcm, params, format) < 0) {
printf("Cannot set format %s\n",
snd_pcm_format_name(format));
return -1;
}
}
if (channels > 0) {
if (snd_pcm_hw_params_set_channels(pcm, params, channels) < 0) {
printf("Cannot set channels %d\n", channels);
return -1;
}
}
if (rate > 0) {
if (snd_pcm_hw_params_set_rate_near(pcm, params, (unsigned int *)&rate, 0) < 0) {
printf("Cannot set rate %d\n", rate);
return -1;
}
}
if (snd_pcm_hw_params(pcm, params) < 0) {
printf("Cannot set hw_params\n");
return -1;
}
return 0;
}
int snd_pcm_dump_hw_setup(snd_pcm_t *pcm, snd_output_t *out)
{
snd_output_printf(out, " stream : %s\n",
snd_pcm_stream_name(pcm->stream));
snd_output_printf(out, " access : %s\n",
snd_pcm_access_name(pcm->access));
snd_output_printf(out, " format : %s\n",
snd_pcm_format_name(pcm->format));
snd_output_printf(out, " subformat : %s\n",
snd_pcm_subformat_name(pcm->subformat));
snd_output_printf(out, " channels : %u\n", pcm->channels);
snd_output_printf(out, " rate : %u\n", pcm->rate);
snd_output_printf(out, " exact rate : %g (%u/%u)\n",
(pcm->hw_params.rate_den ?
((double) pcm->hw_params.rate_num / pcm->hw_params.rate_den) : 0.0),
pcm->hw_params.rate_num, pcm->hw_params.rate_den);
snd_output_printf(out, " msbits : %u\n", pcm->hw_params.msbits);
snd_output_printf(out, " buffer_size : %lu\n", pcm->buffer_size);
snd_output_printf(out, " period_size : %lu\n", pcm->period_size);
snd_output_printf(out, " period_time : %u\n", pcm->period_time);
#if 0 /* deprecated */
snd_output_printf(out, " tick_time : %u\n", pcm->tick_time);
#endif
return 0;
}
int main(int argc, char *argv[])
{
snd_pcm_t *handle;
snd_pcm_t *handle_play;
int err, morehelp;
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
int method = 0;
signed short *samples;
unsigned int chn;
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
printf("Capture device is %s\n", device);
printf("Stream parameters are %iHz, %s, %i channels\n", rate, snd_pcm_format_name(format), channels);
/*open the playback*/
if ((err = snd_pcm_open(&handle_play, device,SND_PCM_STREAM_PLAYBACK, 0)) < 0)
{
printf("Capture open error: %s\n", snd_strerror(err));
return 0;
}
/* set the hard ware parameter*/
if ((err = set_hwparams(handle_play,hwparams,SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("Setting of hwparams failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
/*open the capture*/
if ((err = snd_pcm_open(&handle, device,SND_PCM_STREAM_CAPTURE, 0)) < 0)
{
printf("Capture open error: %s\n", snd_strerror(err));
return 0;
}
/* set the hard ware parameter*/
if ((err = set_hwparams(handle, hwparams,SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("Setting of hwparams failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
static struct timeval oldtv;
static struct timeval tv;
/*avasounil = snd_pcm_avail_update(handle);*/
gettimeofday(&tv,NULL);
// printf("play back time %lu\n",(tv.tv_sec-oldtv.tv_sec)*1000000+tv.tv_usec-oldtv.tv_usec);
printf("main time %u: %u \n",tv.tv_sec,tv.tv_usec);
oldtv = tv;
/*async for capture */
async_loop(handle);
/* */
write_loop(handle_play);
/*while(1)
{
}*/
}
/*
* proc interface
*/
static void print_formats(struct snd_info_buffer *buffer)
{
int i;
for (i = 0; i < SNDRV_PCM_FORMAT_LAST; i++) {
if (dummy_pcm_hardware.formats & (1ULL << i))
snd_iprintf(buffer, " %s", snd_pcm_format_name(i));
}
}
void help(void)
{
int k;
printf(
"Usage: alsaloop [OPTION]...\n\n"
"-h,--help help\n"
"-g,--config configuration file (one line = one job specified)\n"
"-d,--daemonize daemonize the main process and use syslog for errors\n"
"-P,--pdevice playback device\n"
"-C,--cdevice capture device\n"
"-X,--pctl playback ctl device\n"
"-Y,--cctl capture ctl device\n"
"-l,--latency requested latency in frames\n"
"-t,--tlatency requested latency in usec (1/1000000sec)\n"
"-f,--format sample format\n"
"-c,--channels channels\n"
"-r,--rate rate\n"
"-n,--resample resample in alsa-lib\n"
"-A,--samplerate use converter (0=sincbest,1=sincmedium,2=sincfastest,\n"
" 3=zerohold,4=linear)\n"
"-B,--buffer buffer size in frames\n"
"-E,--period period size in frames\n"
"-s,--seconds duration of loop in seconds\n"
"-b,--nblock non-block mode (very early process wakeup)\n"
"-S,--sync sync mode(0=none,1=simple,2=captshift,3=playshift,4=samplerate,\n"
" 5=auto)\n"
"-a,--slave stream parameters slave mode (0=auto, 1=on, 2=off)\n"
"-T,--thread thread number (-1 = create unique)\n"
"-m,--mixer redirect mixer, argument is:\n"
" SRC_SLAVE_ID(PLAYBACK)[@DST_SLAVE_ID(CAPTURE)]\n"
"-O,--ossmixer rescan and redirect oss mixer, argument is:\n"
" ALSA_ID@OSS_ID (for example: \"Master@VOLUME\")\n"
"-e,--effect apply an effect (bandpass filter sweep)\n"
"-v,--verbose verbose mode (more -v means more verbose)\n"
"-w,--workaround use workaround (serialopen)\n"
"-U,--xrun xrun profiling\n"
"-W,--wake process wake timeout in ms\n"
);
printf("\nRecognized sample formats are:");
for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
const char *s = snd_pcm_format_name(k);
if (s)
printf(" %s", s);
}
printf("\n\n");
printf(
"Tip #1 (usable 500ms latency, good CPU usage, superb xrun prevention):\n"
" alsaloop -t 500000\n"
"Tip #2 (superb 1ms latency, but heavy CPU usage):\n"
" alsaloop -t 1000\n"
);
}
int main(int argc, char *argv[])
{
snd_pcm_t *handle;
snd_pcm_t *handle_play;
int err, morehelp;
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
int method = 0;
signed short *samples;
unsigned int chn;
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
printf("Capture device is %s\n", device);
printf("Stream parameters are %iHz, %s, %i channels\n", rate, snd_pcm_format_name(format), channels);
/*open the playback*/
if ((err = snd_pcm_open(&handle_play, device,SND_PCM_STREAM_PLAYBACK, 0)) < 0)
{
printf("Capture open error: %s\n", snd_strerror(err));
return 0;
}
/* set the hard ware parameter*/
if ((err = set_hwparams(handle_play,hwparams,SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("Setting of hwparams failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
/*open the capture*/
if ((err = snd_pcm_open(&handle, device,SND_PCM_STREAM_CAPTURE, 0)) < 0)
{
printf("Capture open error: %s\n", snd_strerror(err));
return 0;
}
/* set the hard ware parameter*/
if ((err = set_hwparams(handle, hwparams,SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
printf("Setting of hwparams failed: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
/*async for capture */
async_loop(handle);
/* */
write_loop(handle_play);
/*while(1)
{
}*/
}
static int a2dp_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params)
{
snd_pcm_a2dp_t *a2dp = io->private_data;
unsigned int period_bytes;
DBG("a2dp %p", a2dp);
a2dp->frame_bytes = (snd_pcm_format_physical_width(io->format) * io->channels) / 8;
period_bytes = io->period_size * a2dp->frame_bytes;
DBG("format %s rate %d channels %d", snd_pcm_format_name(io->format),
io->rate, io->channels);
DBG("frame_bytes %d period_bytes %d period_size %ld buffer_size %ld",
a2dp->frame_bytes, period_bytes, io->period_size, io->buffer_size);
return 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);
}
void help(void)
{
int k;
printf(
"Usage: latency [OPTION]... [FILE]...\n"
"-h,--help help\n"
"-P,--pdevice playback device\n"
"-C,--cdevice capture device\n"
"-m,--min minimum latency in frames\n"
"-M,--max maximum latency in frames\n"
"-F,--frames frames to transfer\n"
"-f,--format sample format\n"
"-c,--channels channels\n"
"-r,--rate rate\n"
"-s,--seconds duration of test in seconds\n"
"-b,--block block mode\n"
"-t,--time maximal tick time in us\n"
"-p,--poll use poll (wait for event - reduces CPU usage)\n"
"-e,--effect apply an effect (bandpass filter sweep)\n"
);
printf("Recognized sample formats are:");
// for (k = 0; k < SND_PCM_FORMAT_LAST; ++(unsigned long) k) {
// gave compiler warning `use of cast value as lvalue deprecated'
for (k = 0; k < SND_PCM_FORMAT_LAST; ++k) {
const char *s = snd_pcm_format_name(k);
if (s)
printf(" %s", s);
}
printf("\n\n");
printf(
"Tip #1 (usable latency with large periods, non-blocking mode, good CPU usage,\n"
" superb xrun prevention):\n"
" latency -m 8192 -M 8192 -t 1 -p\n"
"Tip #2 (superb latency, non-blocking mode, but heavy CPU usage):\n"
" latency -m 128 -M 128\n"
);
}
/* write a WAVE-header */
static void begin_wave(int fd, size_t cnt)
{
WaveHeader h;
WaveFmtBody f;
WaveChunkHeader cf, cd;
int bits;
u_int tmp;
u_short tmp2;
/* WAVE cannot handle greater than 32bit (signed?) int */
if (cnt == (size_t)-2)
cnt = 0x7fffff00;
bits = 8;
switch ((unsigned long) hwparams.format) {
case SND_PCM_FORMAT_U8:
bits = 8;
break;
case SND_PCM_FORMAT_S16_LE:
bits = 16;
break;
case SND_PCM_FORMAT_S32_LE:
case SND_PCM_FORMAT_FLOAT_LE:
bits = 32;
break;
case SND_PCM_FORMAT_S24_LE:
case SND_PCM_FORMAT_S24_3LE:
bits = 24;
break;
default:
error(_("Wave doesn't support %s format..."), snd_pcm_format_name(hwparams.format));
exit(EXIT_FAILURE);
}
h.magic = WAV_RIFF;
tmp = cnt + sizeof(WaveHeader) + sizeof(WaveChunkHeader) + sizeof(WaveFmtBody) + sizeof(WaveChunkHeader) - 8;
h.length = LE_INT(tmp);
h.type = WAV_WAVE;
cf.type = WAV_FMT;
cf.length = LE_INT(16);
if (hwparams.format == SND_PCM_FORMAT_FLOAT_LE)
f.format = LE_SHORT(WAV_FMT_IEEE_FLOAT);
else
f.format = LE_SHORT(WAV_FMT_PCM);
f.channels = LE_SHORT(hwparams.channels);
f.sample_fq = LE_INT(hwparams.rate);
#if 0
tmp2 = (samplesize == 8) ? 1 : 2;
f.byte_p_spl = LE_SHORT(tmp2);
tmp = dsp_speed * hwparams.channels * (u_int) tmp2;
#else
tmp2 = hwparams.channels * snd_pcm_format_physical_width(hwparams.format) / 8;
f.byte_p_spl = LE_SHORT(tmp2);
tmp = (u_int) tmp2 * hwparams.rate;
#endif
f.byte_p_sec = LE_INT(tmp);
f.bit_p_spl = LE_SHORT(bits);
cd.type = WAV_DATA;
cd.length = LE_INT(cnt);
if (write(fd, &h, sizeof(WaveHeader)) != sizeof(WaveHeader) ||
write(fd, &cf, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader) ||
write(fd, &f, sizeof(WaveFmtBody)) != sizeof(WaveFmtBody) ||
write(fd, &cd, sizeof(WaveChunkHeader)) != sizeof(WaveChunkHeader)) {
error(_("write error"));
exit(EXIT_FAILURE);
}
}
/* ------- PCM INITS --------------------------------- */
static int set_hwparams(snd_pcm_t *handle, snd_pcm_hw_params_t *params,int *chs)
{
#ifndef ALSAAPI9
unsigned int rrate;
int err, dir;
int channels_allocated = 0;
/* choose all parameters */
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
check_error(err,"Broken configuration: no configurations available");
return err;
}
/* set the nointerleaved read/write format */
err = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_MMAP_NONINTERLEAVED);
if (err >= 0) {
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Access type %s available","SND_PCM_ACCESS_MMAP_NONINTERLEAVED");
#endif
}
else{
check_error(err,"No Accesstype SND_PCM_ACCESS_MMAP_NONINTERLEAVED");
return err;
}
/* set the sample format */
err = snd_pcm_hw_params_set_format(handle, params, ALSAMM_FORMAT);
if (err < 0) {
check_error(err,"Sample format not available for playback");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Setting format to %s",snd_pcm_format_name(ALSAMM_FORMAT));
#endif
/* first check samplerate since channels numbers
are samplerate dependent (double speed) */
/* set the stream rate */
rrate = alsamm_sr;
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Samplerate request: %i Hz",rrate);
#endif
dir=-1;
err = snd_pcm_hw_params_set_rate_near(handle, params, &rrate, &dir);
if (err < 0) {
check_error(err,"Rate not available");
return err;
}
if (rrate != alsamm_sr) {
post("Warning: rate %iHz doesn't match requested %iHz", rrate,alsamm_sr);
alsamm_sr = rrate;
}
else
if(sys_verbose)
post("Samplerate is set to %iHz",alsamm_sr);
/* Info on channels */
{
int maxchs,minchs,channels = *chs;
if((err = snd_pcm_hw_params_get_channels_max(params,
(unsigned int *)&maxchs)) < 0){
check_error(err,"Getting channels_max not available");
return err;
}
if((err = snd_pcm_hw_params_get_channels_min(params,
(unsigned int *)&minchs)) < 0){
check_error(err,"Getting channels_min not available");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Getting channels:min=%d, max= %d for request=%d",minchs,maxchs,channels);
#endif
if(channels < 0)channels=maxchs;
if(channels > maxchs)channels = maxchs;
if(channels < minchs)channels = minchs;
if(channels != *chs)
post("requested channels=%d but used=%d",*chs,channels);
*chs = channels;
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("trying to use channels: %d",channels);
#endif
}
/* set the count of channels */
err = snd_pcm_hw_params_set_channels(handle, params, *chs);
if (err < 0) {
check_error(err,"Channels count not available");
return err;
}
/* testing for channels */
if((err = snd_pcm_hw_params_get_channels(params,(unsigned int *)chs)) < 0)
check_error(err,"Get channels not available");
#ifdef ALSAMM_DEBUG
else
if(sys_verbose)
post("When setting channels count and got %d",*chs);
#endif
/* if buffersize is set use this instead buffertime */
if(alsamm_buffersize > 0){
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("hw_params: ask for max buffersize of %d samples",
(unsigned int) alsamm_buffersize );
#endif
alsamm_buffer_size = alsamm_buffersize;
err = snd_pcm_hw_params_set_buffer_size_near(handle, params,
(unsigned long *)&alsamm_buffer_size);
if (err < 0) {
check_error(err,"Unable to set max buffer size");
return err;
}
}
else{
if(alsamm_buffertime <= 0) /* should never happen, but use 20ms */
alsamm_buffertime = 20000;
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("hw_params: ask for max buffertime of %d ms",
(unsigned int) (alsamm_buffertime*0.001) );
#endif
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&alsamm_buffertime, &dir);
if (err < 0) {
check_error(err,"Unable to set max buffer time");
return err;
}
}
err = snd_pcm_hw_params_get_buffer_time(params,
(unsigned int *)&alsamm_buffertime, &dir);
if (err < 0) {
check_error(err,"Unable to get buffer time");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("hw_params: got buffertime to %f ms",
(float) (alsamm_buffertime*0.001));
#endif
err = snd_pcm_hw_params_get_buffer_size(params,
(unsigned long *)&alsamm_buffer_size);
if (err < 0) {
check_error(err,"Unable to get buffer size");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("hw_params: got buffersize to %d samples",(int) alsamm_buffer_size);
#endif
err = snd_pcm_hw_params_get_period_size(params,
(unsigned long *)&alsamm_period_size, &dir);
if (err > 0) {
check_error(err,"Unable to get period size");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Got period size of %d", (int) alsamm_period_size);
#endif
{
unsigned int pmin,pmax;
err = snd_pcm_hw_params_get_periods_min(params, &pmin, &dir);
if (err > 0) {
check_error(err,"Unable to get period size");
return err;
}
err = snd_pcm_hw_params_get_periods_min(params, &pmax, &dir);
if (err > 0) {
check_error(err,"Unable to get period size");
return err;
}
/* use maximum of periods */
if( alsamm_periods <= 0)
alsamm_periods = pmax;
alsamm_periods = (alsamm_periods > pmax)?pmax:alsamm_periods;
alsamm_periods = (alsamm_periods < pmin)?pmin:alsamm_periods;
err = snd_pcm_hw_params_set_periods(handle, params, alsamm_periods, dir);
if (err > 0) {
check_error(err,"Unable to set periods");
return err;
}
err = snd_pcm_hw_params_get_periods(params, &pmin, &dir);
if (err > 0) {
check_error(err,"Unable to get periods");
return err;
}
#ifdef ALSAMM_DEBUG
if(sys_verbose)
post("Got periods of %d, where periodsmin=%d, periodsmax=%d",
alsamm_periods,pmin,pmax);
#endif
}
/* write the parameters to device */
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
check_error(err,"Unable to set hw params");
return err;
}
#endif /* ALSAAPI9 */
return 0;
}
static int initialize_device(struct audio_info_struct *ai)
{
snd_pcm_hw_params_t *hw;
int i;
snd_pcm_format_t format;
unsigned int rate;
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t period_size;
snd_pcm_sw_params_t *sw;
snd_pcm_uframes_t boundary;
snd_pcm_hw_params_alloca(&hw);
if (snd_pcm_hw_params_any(ai->handle, hw) < 0) {
fprintf(stderr, "initialize_device(): no configuration available\n");
return -1;
}
if (snd_pcm_hw_params_set_access(ai->handle, hw, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
fprintf(stderr, "initialize_device(): device does not support interleaved access\n");
return -1;
}
format = SND_PCM_FORMAT_UNKNOWN;
for (i = 0; i < NUM_FORMATS; ++i) {
if (ai->format == format_map[i].mpg123) {
format = format_map[i].alsa;
break;
}
}
if (format == SND_PCM_FORMAT_UNKNOWN) {
fprintf(stderr, "initialize_device(): invalid sample format %d\n", ai->format);
errno = EINVAL;
return -1;
}
if (snd_pcm_hw_params_set_format(ai->handle, hw, format) < 0) {
fprintf(stderr, "initialize_device(): cannot set format %s\n", snd_pcm_format_name(format));
return -1;
}
if (snd_pcm_hw_params_set_channels(ai->handle, hw, ai->channels) < 0) {
fprintf(stderr, "initialize_device(): cannot set %d channels\n", ai->channels);
return -1;
}
rate = ai->rate;
if (snd_pcm_hw_params_set_rate_near(ai->handle, hw, &rate, NULL) < 0) {
fprintf(stderr, "initialize_device(): cannot set rate %u\n", rate);
return -1;
}
if (!rates_match(ai->rate, rate)) {
fprintf(stderr, "initialize_device(): rate %ld not available, using %u\n", ai->rate, rate);
/* return -1; */
}
buffer_size = rate * BUFFER_LENGTH;
if (snd_pcm_hw_params_set_buffer_size_near(ai->handle, hw, &buffer_size) < 0) {
fprintf(stderr, "initialize_device(): cannot set buffer size\n");
return -1;
}
period_size = buffer_size / 4;
if (snd_pcm_hw_params_set_period_size_near(ai->handle, hw, &period_size, NULL) < 0) {
fprintf(stderr, "initialize_device(): cannot set period size\n");
return -1;
}
if (snd_pcm_hw_params(ai->handle, hw) < 0) {
fprintf(stderr, "initialize_device(): cannot set hw params\n");
return -1;
}
snd_pcm_sw_params_alloca(&sw);
if (snd_pcm_sw_params_current(ai->handle, sw) < 0) {
fprintf(stderr, "initialize_device(): cannot get sw params\n");
return -1;
}
/* start playing after the first write */
if (snd_pcm_sw_params_set_start_threshold(ai->handle, sw, 1) < 0) {
fprintf(stderr, "initialize_device(): cannot set start threshold\n");
return -1;
}
if (snd_pcm_sw_params_get_boundary(sw, &boundary) < 0) {
fprintf(stderr, "initialize_device(): cannot get boundary\n");
return -1;
}
/* never stop on underruns */
if (snd_pcm_sw_params_set_stop_threshold(ai->handle, sw, boundary) < 0) {
fprintf(stderr, "initialize_device(): cannot set stop threshold\n");
return -1;
}
/* wake up on every interrupt */
if (snd_pcm_sw_params_set_avail_min(ai->handle, sw, 1) < 0) {
fprintf(stderr, "initialize_device(): cannot set min avail\n");
return -1;
}
#if 0
/* always write as many frames as possible */
if (snd_pcm_sw_params_set_xfer_align(ai->handle, sw, 1) < 0) {
fprintf(stderr, "initialize_device(): cannot set transfer alignment\n");
return -1;
}
#endif
/* play silence when there is an underrun */
if (snd_pcm_sw_params_set_silence_size(ai->handle, sw, boundary) < 0) {
fprintf(stderr, "initialize_device(): cannot set silence size\n");
return -1;
}
if (snd_pcm_sw_params(ai->handle, sw) < 0) {
fprintf(stderr, "initialize_device(): cannot set sw params\n");
return -1;
}
return 0;
}
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;
}
static int aml_pcm_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct aml_runtime_data *prtd = runtime->private_data;
audio_stream_t *s = &prtd->s;
int iec958 = 0;
if(prtd == 0)
return 0;
switch(runtime->rate){
case 192000:
s->sample_rate = AUDIO_CLK_FREQ_192;
break;
case 176400:
s->sample_rate = AUDIO_CLK_FREQ_1764;
break;
case 96000:
s->sample_rate = AUDIO_CLK_FREQ_96;
break;
case 88200:
s->sample_rate = AUDIO_CLK_FREQ_882;
break;
case 48000:
s->sample_rate = AUDIO_CLK_FREQ_48;
iec958 = 2;
break;
case 44100:
s->sample_rate = AUDIO_CLK_FREQ_441;
iec958 = 0;
break;
case 32000:
s->sample_rate = AUDIO_CLK_FREQ_32;
iec958 = 3;
break;
case 8000:
s->sample_rate = AUDIO_CLK_FREQ_8;
break;
case 11025:
s->sample_rate = AUDIO_CLK_FREQ_11;
break;
case 16000:
s->sample_rate = AUDIO_CLK_FREQ_16;
break;
case 22050:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
case 12000:
s->sample_rate = AUDIO_CLK_FREQ_12;
break;
case 24000:
s->sample_rate = AUDIO_CLK_FREQ_22;
break;
default:
s->sample_rate = AUDIO_CLK_FREQ_441;
break;
};
// iec958 and i2s clock are separated since M8
#if MESON_CPU_TYPE < MESON_CPU_TYPE_MESON8
audio_set_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_util_set_dac_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
#else
audio_set_i2s_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_set_958_clk(s->sample_rate, AUDIO_CLK_256FS);
audio_util_set_dac_i2s_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
audio_util_set_dac_958_format(AUDIO_ALGOUT_DAC_FORMAT_DSP);
#endif
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK){
trigger_underun = 0;
aml_hw_i2s_init(runtime);
aml_hw_iec958_init(substream);
}
else{
//printk("aml_pcm_prepare SNDRV_PCM_STREAM_CAPTURE: dma_addr=%x, dma_bytes=%x\n", runtime->dma_addr, runtime->dma_bytes);
audio_in_i2s_set_buf(runtime->dma_addr, runtime->dma_bytes*2,audioin_mode);
memset((void*)runtime->dma_area,0,runtime->dma_bytes*2);
{
int * ppp = (int*)(runtime->dma_area+runtime->dma_bytes*2-8);
ppp[0] = 0x78787878;
ppp[1] = 0x78787878;
}
}
if( IEC958_MODE == AIU_958_MODE_PCM_RAW){
if(IEC958_mode_codec == 4 ){ // need Over clock for dd+
WRITE_MPEG_REG_BITS(AIU_CLK_CTRL, 0, 4, 2); // 4x than i2s
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DOBLY_DIGITAL_PLUS, substream);
}else if(IEC958_mode_codec == 3 ||IEC958_mode_codec == 1 ){ // no-over clock for dts pcm mode
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DTS, substream);
}
else //dd
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_AC_3, substream);
}else if(IEC958_mode_codec == 1){
audio_notify_hdmi_info(AOUT_EVENT_RAWDATA_DTS, substream);
}else{
audio_notify_hdmi_info(AOUT_EVENT_IEC_60958_PCM, substream);
}
#if 0
printk("Audio Parameters:\n");
printk("\tsample rate: %d\n", runtime->rate);
printk("\tchannel: %d\n", runtime->channels);
printk("\tsample bits: %d\n", runtime->sample_bits);
printk("\tformat: %s\n", snd_pcm_format_name(runtime->format));
printk("\tperiod size: %ld\n", runtime->period_size);
printk("\tperiods: %d\n", runtime->periods);
printk("\tiec958 mode: %d, raw=%d, codec=%d\n", IEC958_MODE, IEC958_mode_raw, IEC958_mode_codec);
#endif
return 0;
}
/**
* Allocate the memory-mapped buffer for direct sound, and set up the
* callback.
*/
static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
{
snd_pcm_t *pcm = pdbi->pcm;
snd_pcm_format_t format;
snd_pcm_uframes_t frames, ofs, avail, psize, boundary;
unsigned int channels, bits_per_sample, bits_per_frame;
int err, mmap_mode;
const snd_pcm_channel_area_t *areas;
snd_pcm_hw_params_t *hw_params = pdbi->hw_params;
snd_pcm_sw_params_t *sw_params = pdbi->sw_params;
void *buf;
mmap_mode = snd_pcm_type(pcm);
if (mmap_mode == SND_PCM_TYPE_HW)
TRACE("mmap'd buffer is a direct hardware buffer.\n");
else if (mmap_mode == SND_PCM_TYPE_DMIX)
TRACE("mmap'd buffer is an ALSA dmix buffer\n");
else
TRACE("mmap'd buffer is an ALSA type %d buffer\n", mmap_mode);
err = snd_pcm_hw_params_get_period_size(hw_params, &psize, NULL);
err = snd_pcm_hw_params_get_format(hw_params, &format);
err = snd_pcm_hw_params_get_buffer_size(hw_params, &frames);
err = snd_pcm_hw_params_get_channels(hw_params, &channels);
bits_per_sample = snd_pcm_format_physical_width(format);
bits_per_frame = bits_per_sample * channels;
if (TRACE_ON(dsalsa))
ALSA_TraceParameters(hw_params, NULL, FALSE);
TRACE("format=%s frames=%ld channels=%d bits_per_sample=%d bits_per_frame=%d\n",
snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
pdbi->mmap_buflen_frames = frames;
pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( pcm, frames );
snd_pcm_sw_params_current(pcm, sw_params);
snd_pcm_sw_params_set_start_threshold(pcm, sw_params, 0);
snd_pcm_sw_params_get_boundary(sw_params, &boundary);
snd_pcm_sw_params_set_stop_threshold(pcm, sw_params, boundary);
snd_pcm_sw_params_set_silence_threshold(pcm, sw_params, boundary);
snd_pcm_sw_params_set_silence_size(pcm, sw_params, 0);
snd_pcm_sw_params_set_avail_min(pcm, sw_params, 0);
err = snd_pcm_sw_params(pcm, sw_params);
avail = snd_pcm_avail_update(pcm);
if ((snd_pcm_sframes_t)avail < 0)
{
ERR("No buffer is available: %s.\n", snd_strerror(avail));
return DSERR_GENERIC;
}
if (!pdbi->mmap)
{
buf = pdbi->mmap_buffer = HeapAlloc(GetProcessHeap(), 0, pdbi->mmap_buflen_bytes);
if (!buf)
return DSERR_OUTOFMEMORY;
snd_pcm_format_set_silence(format, buf, pdbi->mmap_buflen_frames);
pdbi->mmap_pos = 0;
}
else
{
err = snd_pcm_mmap_begin(pcm, &areas, &ofs, &avail);
if ( err < 0 )
{
ERR("Can't map sound device for direct access: %s/%d\n", snd_strerror(err), err);
return DSERR_GENERIC;
}
snd_pcm_format_set_silence(format, areas->addr, pdbi->mmap_buflen_frames);
pdbi->mmap_pos = ofs + snd_pcm_mmap_commit(pcm, ofs, 0);
pdbi->mmap_buffer = areas->addr;
}
TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
return DS_OK;
}
int AlsaAudioPlugin::init(shared_ptr<t_CPC> cpc, shared_ptr<t_PSG> psg)
{
if(!cpc->snd_enabled)
{
InfoLogMessage("[ALSA Audio Plugin] Not opening audio because disabled in the config");
return 0;
}
/* TODO */
unsigned int rate = cpc->snd_playback_rate;
int channels = cpc->snd_stereo ? 2 : 1;
snd_pcm_format_t format = SND_PCM_FORMAT_S16;
switch(cpc->snd_bits)
{
case 8:
format = SND_PCM_FORMAT_U8;
break;
case 16:
format = SND_PCM_FORMAT_S16;
break;
case 24:
format = SND_PCM_FORMAT_S24;
break;
case 32:
format = SND_PCM_FORMAT_S32;
break;
default:
WarningLogMessage("[ALSA Audio Plugin] Warning, %d bits format unknown, fallback to %s.", cpc->snd_bits, snd_pcm_format_name(format));
}
int periods = 2;
periodsize = 4096;
unsigned int exact_rate;
int dir, err;
/* Handle for the PCM device */
//snd_pcm_t *pcm_handle;
/* Playback stream */
snd_pcm_stream_t stream = SND_PCM_STREAM_PLAYBACK;
/* This structure contains information about */
/* the hardware and can be used to specify the */
/* configuration to be used for the PCM stream. */
snd_pcm_hw_params_t *hwparams;
/* Name of the PCM device, like plughw:0,0 */
/* The first number is the number of the soundcard, */
/* the second number is the number of the device. */
char *pcm_name = strdup("plughw:0,0");
WarningLogMessage("TODO [%s:%d]: pcm_name need to be configurable.", __FILE__, __LINE__);
/* Allocate the snd_pcm_hw_params_t structure on the stack. */
snd_pcm_hw_params_alloca(&hwparams);
/* Open PCM. The last parameter of this function is the mode. */
/* If this is set to 0, the standard mode is used. Possible */
/* other values are SND_PCM_NONBLOCK and SND_PCM_ASYNC. */
/* If SND_PCM_NONBLOCK is used, read / write access to the */
/* PCM device will return immediately. If SND_PCM_ASYNC is */
/* specified, SIGIO will be emitted whenever a period has */
/* been completely processed by the soundcard. */
if(err = snd_pcm_open(&pcm_handle, pcm_name, stream, 0) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error opening PCM device %s (Error: %s)", pcm_name, snd_strerror(err));
return 1;
}
/* Init hwparams with full configuration space */
if(err = snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Can not configure PCM device %s. (Error: %s)", pcm_name, snd_strerror(err));
return 1;
}
/* Set access type. This can be either */
/* SND_PCM_ACCESS_RW_INTERLEAVED or */
/* SND_PCM_ACCESS_RW_NONINTERLEAVED. */
/* There are also access types for MMAPed */
/* access, but this is beyond the scope */
/* of this introduction. */
if(err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting access on device %s. (Error: %s)", pcm_name, snd_strerror(err));
return 1;
}
/* Set sample format */
if(err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting format %s on device %s. (Error: %s)", snd_pcm_format_name(format), pcm_name, snd_strerror(err));
return 1;
}
/* Set sample rate. If the exact rate is not supported */
/* by the hardware, use nearest possible rate. */
#if 0 // Segfault... Humf... TODO
exact_rate = rate;
if(snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &exact_rate, &dir) < 0)
{
ErrorLogMessage("Error setting rate (%d) on device %s.", rate, pcm_name);
}
if(dir != 0) {
WarningLogMessage("The rate %d Hz is not supported by your hardware on device %s.\n" \
"==> Using %d Hz instead.", pcm_name, rate, exact_rate);
}
#else
exact_rate = rate;
if(err = snd_pcm_hw_params_set_rate(pcm_handle, hwparams, exact_rate, 0) < 0)
{
ErrorLogMessage("[ALSA Audio Plugin] Error setting rate (%d) on device %s. (Error: %s)", rate, pcm_name, snd_strerror(err));
}
#endif
/* Set number of channels */
if(err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, channels) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting channels (%d) on device %s. (Error: %s)", channels, pcm_name, snd_strerror(err));
return 1;
}
/* Set number of periods. Periods used to be called fragments. */
if(err = snd_pcm_hw_params_set_periods(pcm_handle, hwparams, periods, 0) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting periods (%d) on device %s. (Error: %s)", periods, pcm_name, snd_strerror(err));
return 1;
}
/* Set buffer size (in frames). The resulting latency is given by */
/* latency = periodsize * periods / (rate * bytes_per_frame) */
int buffer_size = (periodsize * periods) >> 2;
if(err = snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, buffer_size) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting buffersize (%d) on device %s. (Error: %s)", buffer_size, pcm_name, snd_strerror(err));
return 1;
}
/* Apply HW parameter settings to */
/* PCM device and prepare device */
if(err = snd_pcm_hw_params(pcm_handle, hwparams) < 0) {
ErrorLogMessage("[ALSA Audio Plugin] Error setting HW params on device %s. (Error: %s)", pcm_name, snd_strerror(err));
return 1;
}
sndBuffer = new uint8_t[periodsize*4*2];
if(!sndBuffer)
{
ErrorLogMessage("[ALSA Audio Plugin] sndBuffer allocation error.");
return 1;
}
sndBufferPtr = sndBuffer;
InfoLogMessage("[ALSA Audio Plugin] PCM device %s open at %d Hz %s, %d channels.", pcm_name, rate, snd_pcm_format_name(format), channels);
return 0;
}
static snd_pcm_uframes_t set_params(snd_pcm_t *handle, snd_pcm_stream_t stream)
{
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t chunk_size = 0;
snd_pcm_uframes_t start_threshold;
unsigned period_time = 0;
unsigned buffer_time = 0;
size_t chunk_bytes = 0;
int err;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, params);
if (err < 0) {
printf("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) {
printf("Access type not available");
exit(EXIT_FAILURE);
}
printf("format = %s, channels = %d, rate = %d\n",
snd_pcm_format_name(hwparams.format),hwparams.channels,hwparams.rate);
//err = snd_pcm_hw_params_set_format(handle, params, hwparams.format);
err = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
if (err < 0) {
printf("Sample format non available");
exit(EXIT_FAILURE);
}
//err = snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
err = snd_pcm_hw_params_set_channels(handle, params, 2);
if (err < 0) {
printf("Channels count non available");
exit(EXIT_FAILURE);
}
#if 0
//add by yjc 2012/08/21
err = set_audio_clk_freq(hwparams.rate);
if (err < 0){
printf("set_audio_clk_freq fail..........\n");
exit(EXIT_FAILURE);
}
#endif
err = snd_pcm_hw_params_set_rate(handle, params, hwparams.rate, 0);
if (err < 0) {
printf("Rate non available");
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_get_buffer_time_max(params,
&buffer_time, 0);
assert(err >= 0);
if (buffer_time > 500000)
buffer_time = 500000;
period_time = buffer_time / 4;
err = snd_pcm_hw_params_set_period_time_near(handle, params,
&period_time, 0);
assert(err >= 0);
err = snd_pcm_hw_params_set_buffer_time_near(handle, params,
&buffer_time, 0);
assert(err >= 0);
err = snd_pcm_hw_params(handle, params);
if (err < 0) {
printf("Unable to install hw params:");
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) {
printf("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_set_avail_min(handle, swparams, chunk_size);
if(stream == SND_PCM_STREAM_PLAYBACK)
start_threshold = (buffer_size / chunk_size) * chunk_size;
else
start_threshold = 1;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err >= 0);
err = snd_pcm_sw_params_set_stop_threshold(handle, swparams, buffer_size);
assert(err >= 0);
if (snd_pcm_sw_params(handle, swparams) < 0) {
printf("unable to install sw params:");
exit(EXIT_FAILURE);
}
//bits_per_sample = snd_pcm_format_physical_width(hwparams.format);
bits_per_sample = snd_pcm_format_physical_width(SND_PCM_FORMAT_S16_LE);
//bits_per_frame = bits_per_sample * hwparams.channels;
bits_per_frame = bits_per_sample * 2;
chunk_bytes = chunk_size * bits_per_frame / 8;
printf("chunk_size = %d,chunk_bytes = %d,buffer_size = %d\n\n",
(int)chunk_size,chunk_bytes,(int)buffer_size);
return chunk_size;
}
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;
}
int alsa_init(alsa_dev_t *dev, void *ptr, void (*callback)(snd_async_handler_t *))
{
snd_pcm_t *phandle;
snd_pcm_t *chandle;
int err;
snd_pcm_hw_params_t *hwparams_capture, *hwparams_playback;
snd_pcm_sw_params_t *swparams_capture, *swparams_playback;
struct sched_param param;
err = sched_getparam(0, ¶m);
if (err < 0) {
perror("sched_getparam():");
exit(-1);
}
param.sched_priority = sched_get_priority_max(SCHED_FIFO);
err = sched_setscheduler(0, SCHED_FIFO, ¶m);
if (err < 0) {
perror("sched_setscheduler():");
exit(-1);
}
snd_pcm_hw_params_alloca(&hwparams_capture);
snd_pcm_sw_params_alloca(&swparams_capture);
snd_pcm_hw_params_alloca(&hwparams_playback);
snd_pcm_sw_params_alloca(&swparams_playback);
err = snd_output_stdio_attach(&dev->output, stdout, 0);
if (err < 0) {
printf("Output failed: %s\n", snd_strerror(err));
exit(-1);
}
printf("Playback device is %s\n", dev->pdevice);
printf("Stream parameters are %dHz, %s, %d channels\n", dev->rate, snd_pcm_format_name(dev->format), dev->channels);
if ((err = snd_pcm_open(&phandle, dev->pdevice, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
printf("Playback open error: %s\n", snd_strerror(err));
exit(-1);
}
if ((err = alsa_set_hwparams(dev, phandle, hwparams_playback, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
printf("Setting of hwparams_playback failed: %s\n", snd_strerror(err));
exit(-1);
}
if ((err = alsa_set_swparams(dev, phandle, swparams_playback)) < 0) {
printf("Setting of swparams_playback failed: %s\n", snd_strerror(err));
exit(-1);
}
snd_pcm_dump(phandle, dev->output);
printf("Capture device is %s\n", dev->cdevice);
if ((err = snd_pcm_open(&chandle, dev->cdevice, SND_PCM_STREAM_CAPTURE, 0)) < 0) {
printf("Capture open error: %s\n", snd_strerror(err));
exit(-1);
}
if ((err = alsa_set_hwparams(dev, chandle, hwparams_capture, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0) {
printf("Setting of hwparams_capture failed: %s\n", snd_strerror(err));
exit(-1);
}
if ((err = alsa_set_swparams(dev, chandle, swparams_capture)) < 0) {
printf("Setting of swparams_capture failed: %s\n", snd_strerror(err));
exit(-1);
}
snd_pcm_dump(chandle, dev->output);
if ((err = snd_pcm_link(phandle, chandle)) < 0)
{
printf("snd_pcm_link() failed: %s\n", snd_strerror(err));
exit(-1);
}
dev->chandle = chandle;
dev->phandle = phandle;
err = alsa_async_direct_loop(dev, ptr, callback);
if (err < 0)
printf("Transfer failed: %s\n", snd_strerror(err));
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;
}
int main(int argc, char *argv[])
{
struct option long_option[] =
{
{"help", 0, NULL, 'h'},
{"pdevice", 1, NULL, 'P'},
{"cdevice", 1, NULL, 'C'},
{"min", 1, NULL, 'm'},
{"max", 1, NULL, 'M'},
{"frames", 1, NULL, 'F'},
{"format", 1, NULL, 'f'},
{"channels", 1, NULL, 'c'},
{"rate", 1, NULL, 'r'},
{"seconds", 1, NULL, 's'},
{"block", 0, NULL, 'b'},
{"time", 1, NULL, 't'},
{"poll", 0, NULL, 'p'},
{"effect", 0, NULL, 'e'},
{NULL, 0, NULL, 0},
};
snd_pcm_t *phandle, *chandle;
char *buffer;
int err, latency, morehelp;
int ok;
snd_timestamp_t p_tstamp, c_tstamp;
ssize_t r;
size_t frames_in, frames_out, in_max;
int effect = 0;
morehelp = 0;
while (1) {
int c;
if ((c = getopt_long(argc, argv, "hP:C:m:M:F:f:c:r:s:bt:pe", long_option, NULL)) < 0)
break;
switch (c) {
case 'h':
morehelp++;
break;
case 'P':
pdevice = strdup(optarg);
break;
case 'C':
cdevice = strdup(optarg);
break;
case 'm':
err = atoi(optarg) / 2;
latency_min = err >= 4 ? err : 4;
if (latency_max < latency_min)
latency_max = latency_min;
break;
case 'M':
err = atoi(optarg) / 2;
latency_max = latency_min > err ? latency_min : err;
break;
case 'f':
format = snd_pcm_format_value(optarg);
if (format == SND_PCM_FORMAT_UNKNOWN) {
printf("Unknown format, setting to default S16_LE\n");
format = SND_PCM_FORMAT_S16_LE;
}
break;
case 'c':
err = atoi(optarg);
channels = err >= 1 && err < 1024 ? err : 1;
break;
case 'r':
err = atoi(optarg);
rate = err >= 4000 && err < 200000 ? err : 44100;
break;
case 's':
err = atoi(optarg);
loop_sec = err >= 1 && err <= 100000 ? err : 30;
break;
case 'b':
block = 1;
break;
case 't':
tick_time = atoi(optarg);
tick_time = tick_time < 0 ? 0 : tick_time;
break;
case 'p':
use_poll = 1;
break;
case 'e':
effect = 1;
break;
}
}
if (morehelp) {
help();
return 0;
}
err = snd_output_stdio_attach(&output, stdout, 0);
if (err < 0) {
printf("Output failed: %s\n", snd_strerror(err));
return 0;
}
loop_limit = loop_sec * rate;
latency = latency_min - 4;
buffer = malloc((latency_max * snd_pcm_format_width(format) / 8) * 2);
setscheduler();
printf("Playback device is %s\n", pdevice);
printf("Capture device is %s\n", cdevice);
printf("Parameters are %iHz, %s, %i channels, %s mode\n", rate, snd_pcm_format_name(format), channels, block ? "blocking" : "non-blocking");
printf("Wanted tick time: %ius, poll mode: %s\n", tick_time, use_poll ? "yes" : "no");
printf("Loop limit is %li frames, minimum latency = %i, maximum latency = %i\n", loop_limit, latency_min * 2, latency_max * 2);
if ((err = snd_pcm_open(&phandle, pdevice, SND_PCM_STREAM_PLAYBACK, block ? 0 : SND_PCM_NONBLOCK)) < 0) {
printf("Playback open error: %s\n", snd_strerror(err));
return 0;
}
if ((err = snd_pcm_open(&chandle, cdevice, SND_PCM_STREAM_CAPTURE, block ? 0 : SND_PCM_NONBLOCK)) < 0) {
printf("Record open error: %s\n", snd_strerror(err));
return 0;
}
/* initialize the filter sweep variables */
if (effect) {
fs = (float) rate;
BW = FILTER_BANDWIDTH;
lfo = 0;
dlfo = 2.*M_PI*FILTERSWEEP_LFO_FREQ/fs;
x[0] = (float*) malloc(channels*sizeof(float));
x[1] = (float*) malloc(channels*sizeof(float));
x[2] = (float*) malloc(channels*sizeof(float));
y[0] = (float*) malloc(channels*sizeof(float));
y[1] = (float*) malloc(channels*sizeof(float));
y[2] = (float*) malloc(channels*sizeof(float));
}
while (1) {
frames_in = frames_out = 0;
if (setparams(phandle, chandle, &latency) < 0)
break;
showlatency(latency);
if (tick_time_ok)
printf("Using tick time %ius\n", tick_time_ok);
if ((err = snd_pcm_link(chandle, phandle)) < 0) {
printf("Streams link error: %s\n", snd_strerror(err));
exit(0);
}
if (snd_pcm_format_set_silence(format, buffer, latency*channels) < 0) {
fprintf(stderr, "silence error\n");
break;
}
if (writebuf(phandle, buffer, latency, &frames_out) < 0) {
fprintf(stderr, "write error\n");
break;
}
if (writebuf(phandle, buffer, latency, &frames_out) < 0) {
fprintf(stderr, "write error\n");
break;
}
if ((err = snd_pcm_start(chandle)) < 0) {
printf("Go error: %s\n", snd_strerror(err));
exit(0);
}
gettimestamp(phandle, &p_tstamp);
gettimestamp(chandle, &c_tstamp);
#if 0
printf("Playback:\n");
showstat(phandle, frames_out);
printf("Capture:\n");
showstat(chandle, frames_in);
#endif
ok = 1;
in_max = 0;
while (ok && frames_in < loop_limit) {
if (use_poll) {
/* use poll to wait for next event */
snd_pcm_wait(chandle, 1000);
}
if ((r = readbuf(chandle, buffer, latency, &frames_in, &in_max)) < 0)
ok = 0;
else {
if (effect)
applyeffect(buffer,r);
if (writebuf(phandle, buffer, r, &frames_out) < 0)
ok = 0;
}
}
if (ok)
printf("Success\n");
else
printf("Failure\n");
printf("Playback:\n");
showstat(phandle, frames_out);
printf("Capture:\n");
showstat(chandle, frames_in);
showinmax(in_max);
if (p_tstamp.tv_sec == p_tstamp.tv_sec &&
p_tstamp.tv_usec == c_tstamp.tv_usec)
printf("Hardware sync\n");
snd_pcm_drop(chandle);
snd_pcm_nonblock(phandle, 0);
snd_pcm_drain(phandle);
snd_pcm_nonblock(phandle, !block ? 1 : 0);
if (ok) {
#if 1
printf("Playback time = %li.%i, Record time = %li.%i, diff = %li\n",
p_tstamp.tv_sec,
(int)p_tstamp.tv_usec,
c_tstamp.tv_sec,
(int)c_tstamp.tv_usec,
timediff(p_tstamp, c_tstamp));
#endif
break;
}
snd_pcm_unlink(chandle);
snd_pcm_hw_free(phandle);
snd_pcm_hw_free(chandle);
}
snd_pcm_close(phandle);
snd_pcm_close(chandle);
return 0;
}
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 aplaypop_open(void)
{
int err;
snd_pcm_t *handle;
if (pcm_handle)
return 0;
snd_pcm_info_t *info;
snd_pcm_info_alloca(&info);
snd_output_t *log;
err = snd_output_stdio_attach(&log, stderr, 0);
assert(err == 0);
err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0);
if (err != 0) {
fprintf(stderr, "snd_pcm_open(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_nonblock(handle, 0);
if (err != 0) {
fprintf(stderr, "snd_pcm_nonblock(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_info(handle, info);
if (err != 0) {
fprintf(stderr, "snd_pcm_info(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
// DOESN'T WORK!
err = snd_pcm_set_params(handle, SND_PCM_FORMAT_S16_LE,
SND_PCM_ACCESS_RW_INTERLEAVED, CHANNELS, RATE, 1, 50000);
if (err != 0) {
fprintf(stderr, "snd_pcm_set_params(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
// RIGHT WAY:
snd_pcm_hw_params_t *hwparams;
snd_pcm_sw_params_t *swparams;
snd_pcm_format_t format = SND_PCM_FORMAT_S16_LE;
unsigned int channels = CHANNELS;
unsigned int rate = RATE;
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_sw_params_alloca(&swparams);
err = snd_pcm_hw_params_any(handle, hwparams);
if (err != 0) {
fprintf(stderr, "Broken configuration for this PCM: %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED);
if (err != 0) {
fprintf(stderr, "snd_pcm_hw_params_set_access(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_format(handle, hwparams, format);
if (err != 0) {
fprintf(stderr, "snd_pcm_hw_params_set_format(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_channels(handle, hwparams, channels);
if (err != 0) {
fprintf(stderr, "snd_pcm_hw_params_set_channels(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &rate, 0);
if (err != 0) {
fprintf(stderr, "snd_pcm_hw_params_set_rate_near(): %s\n", snd_strerror(err));
exit(EXIT_FAILURE);
}
/*
unsigned buffer_time = 0;
snd_pcm_uframes_t buffer_frames = 0;
if (buffer_time == 0 && buffer_frames == 0) {
err = snd_pcm_hw_params_get_buffer_time_max(hwparams, &buffer_time, 0);
assert(err == 0);
if (buffer_time > 500000)
buffer_time = 500000;
}
unsigned period_time = 0;
snd_pcm_uframes_t period_frames = 0;
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, hwparams, &period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_frames, 0);
assert(err == 0);
if (buffer_time > 0)
err = snd_pcm_hw_params_set_buffer_time_near(handle, hwparams, &buffer_time, 0);
else
err = snd_pcm_hw_params_set_buffer_size_near(handle, hwparams, &buffer_frames);
assert(err == 0);
int monotonic = snd_pcm_hw_params_is_monotonic(hwparams);
int can_pause = snd_pcm_hw_params_can_pause(hwparams);
*/
err = snd_pcm_hw_params(handle, hwparams);
if (err != 0) {
fprintf(stderr, "snd_pcm_hw_params(): %s\n", snd_strerror(err));
snd_pcm_hw_params_dump(hwparams, log);
exit(EXIT_FAILURE);
}
snd_pcm_uframes_t chunk_size = 0;
snd_pcm_hw_params_get_period_size(hwparams, &chunk_size, 0);
snd_pcm_uframes_t buffer_size;
snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size);
if (chunk_size == buffer_size) {
fprintf(stderr, "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_set_avail_min(handle, swparams, chunk_size);
assert(err == 0);
/* round up to closest transfer boundary */
int start_delay = 0;
snd_pcm_uframes_t start_threshold;
if (start_delay <= 0)
start_threshold = buffer_size + (double) rate * start_delay / 1000000;
else
start_threshold = (double) rate * start_delay / 1000000;
start_threshold = start_threshold < 1 ? 1 : start_threshold > buffer_size ? buffer_size : start_threshold;
err = snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
assert(err == 0);
int stop_delay = 0;
snd_pcm_uframes_t stop_threshold;
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);
err = snd_pcm_sw_params(handle, swparams);
if (err != 0) {
fprintf(stderr, "snd_pcm_sw_params(): %s\n", snd_strerror(err));
snd_pcm_sw_params_dump(swparams, log);
exit(EXIT_FAILURE);
}
// END OF THE RIGHT WAY
// snd_pcm_dump(handle, log);
size_t bits_per_sample = snd_pcm_format_physical_width(format);
size_t bits_per_frame = bits_per_sample * channels;
size_t chunk_bytes = chunk_size * bits_per_frame / 8;
//audiobuf = realloc(audiobuf, chunk_bytes);
fprintf(stderr, "%s: %s, Rate %d Hz, Channels=%u\n",
snd_pcm_format_name(format), snd_pcm_format_description(format),
rate, channels);
fprintf(stderr, " bits_per_sample=%u, bits_per_frame=%u, chunk_bytes=%u\n",
bits_per_sample, bits_per_frame, chunk_bytes);
frame_bytes = bits_per_frame / 8;
pcm_handle = handle;
return 0;
}
static int snd_pcm_file_replace_fname(snd_pcm_file_t *file, char **new_fname_p)
{
char value[VALUE_MAXLEN];
char *fname = file->fname;
char *new_fname = NULL;
char *old_last_ch, *old_index_ch, *new_index_ch;
int old_len, new_len, err;
snd_pcm_t *pcm = file->gen.slave;
/* we want to keep fname, const */
old_len = new_len = strlen(fname);
old_last_ch = fname + old_len - 1;
new_fname = malloc(new_len + 1);
if (!new_fname)
return -ENOMEM;
old_index_ch = fname; /* first character of the old name */
new_index_ch = new_fname; /* first char of the new name */
while (old_index_ch <= old_last_ch) {
if (*(old_index_ch) == LEADING_KEY &&
old_index_ch != old_last_ch) {
/* is %, not last char, skipping and checking
next char */
switch (*(++old_index_ch)) {
case RATE_KEY:
snprintf(value, sizeof(value), "%d",
pcm->rate);
err = snd_pcm_file_append_value(&new_fname,
&new_index_ch, &new_len, value);
if (err < 0)
return err;
break;
case CHANNELS_KEY:
snprintf(value, sizeof(value), "%d",
pcm->channels);
err = snd_pcm_file_append_value(&new_fname,
&new_index_ch, &new_len, value);
if (err < 0)
return err;
break;
case BWIDTH_KEY:
snprintf(value, sizeof(value), "%d",
pcm->frame_bits/pcm->channels);
err = snd_pcm_file_append_value(&new_fname,
&new_index_ch, &new_len, value);
if (err < 0)
return err;
break;
case FORMAT_KEY:
err = snd_pcm_file_append_value(&new_fname,
&new_index_ch, &new_len,
snd_pcm_format_name(pcm->format));
if (err < 0)
return err;
break;
default:
/* non-key char, just copying */
*(new_index_ch++) = *(old_index_ch);
}
/* next old char */
old_index_ch++;
} else {
/* plain copying, shifting both strings to next chars */
*(new_index_ch++) = *(old_index_ch++);
}
}
/* closing the new string */
*(new_index_ch) = '\0';
*(new_fname_p) = new_fname;
return 0;
}
int main(int argc, char** argv) {
int i, j;
int showhelp = 0;
unsigned int channels = 1;
int window_size = 1024;
int shift = 256;
char* somfile = NULL;
snd_pcm_format_t format = SND_PCM_FORMAT_UNKNOWN;
int opt;
while ((opt = getopt(argc, argv, "hw:s:f:o:")) != -1) {
switch (opt) {
case 'h':
showhelp = 1;
break;
case 'w':
window_size = atoi(optarg);
break;
case 's':
shift = atoi(optarg);
break;
case 'f':
format = snd_pcm_format_value(optarg);
break;
case 'o':
somfile = strdup(optarg);
break;
default: /* '?' */
showhelp = 1;
break;
}
}
if (showhelp || argc - optind < 1) {
fprintf(stderr, "Usage: %s [-w window_size] [-s shift] "
"[-f format] [-o somfile] <inputFile>\n", argv[0]);
exit(EXIT_SUCCESS);
}
if (format == SND_PCM_FORMAT_UNKNOWN) {
fprintf(stderr, "Unknown format\n");
exit(EXIT_FAILURE);
}
if (somfile == NULL) {
somfile = strdup(DEFAULT_SOMFILE);
}
// Load SOM model
fprintf(stderr, "Read SOM from %s\n", somfile);
FILE* file = fopen(somfile, "r");
if (file == NULL) {
fprintf(stderr, "Cannot Open File %s : %s\n", somfile,
strerror(errno));
exit(EXIT_FAILURE);
}
SOM* net = som_load(file);
fclose(file);
fprintf(stderr, "SOM Loaded (size: %d * %d, dimension: %d)\n",
net->rows, net->cols, net->dims);
assert(window_size / 2 + 1 == net->dims);
// Load Data
fprintf(stderr, "Loading Audio File %s (%d channel(s), %s)\n",
argv[optind], channels, snd_pcm_format_name(format));
FILE* input = fopen(argv[optind], "r");
if (input == NULL) {
fprintf(stderr, "Cannot Open File %s : %s\n", argv[optind],
strerror(errno));
exit(EXIT_FAILURE);
}
double** data;
unsigned long int count = pcm_size(input, channels, format);
count = read_file(input, count, channels, format, &data);
fprintf(stderr, "%lu samples read\n", count);
fclose(input);
// Transform
fprintf(stderr, "Calculating STFT (windows size %d, shift %d)\n",
window_size, shift);
int nos = number_of_spectrum(count, window_size, shift);
TimeFreq* tf = alloc_tf(window_size, nos);
stft(data[0], count, window_size, shift, tf);
free_data(data, channels);
fprintf(stderr, "%d STFT Calculated\n", nos);
// Mapping
double* mspec = malloc(net->dims * sizeof(double));
for (i = 0; i < nos; i++) {
Spectra s = get_spectra(tf, i);
for (j = 0; j < net->dims; j++) {
mspec[j] = get_magnitude(s, j);
}
double dis;
int id = som_map_dis(net, mspec, &dis);
printf("%d ", id);
}
printf("\n");
fprintf(stderr, "Mapping finished\n");
// Free memory
free_tf(tf);
free(mspec);
som_free(net);
exit(EXIT_SUCCESS);
}
static int
set_hwparams (GstAlsaSink * alsa)
{
guint rrate;
gint err;
snd_pcm_hw_params_t *params;
guint period_time, buffer_time;
snd_pcm_hw_params_malloc (¶ms);
GST_DEBUG_OBJECT (alsa, "Negotiating to %d channels @ %d Hz (format = %s) "
"SPDIF (%d)", alsa->channels, alsa->rate,
snd_pcm_format_name (alsa->format), alsa->iec958);
/* start with requested values, if we cannot configure alsa for those values,
* we set these values to -1, which will leave the default alsa values */
buffer_time = alsa->buffer_time;
period_time = alsa->period_time;
retry:
/* choose all parameters */
CHECK (snd_pcm_hw_params_any (alsa->handle, params), no_config);
/* set the interleaved read/write format */
CHECK (snd_pcm_hw_params_set_access (alsa->handle, params, alsa->access),
wrong_access);
/* set the sample format */
if (alsa->iec958) {
/* Try to use big endian first else fallback to le and swap bytes */
if (snd_pcm_hw_params_set_format (alsa->handle, params, alsa->format) < 0) {
alsa->format = SND_PCM_FORMAT_S16_LE;
alsa->need_swap = TRUE;
GST_DEBUG_OBJECT (alsa, "falling back to little endian with swapping");
} else {
alsa->need_swap = FALSE;
}
}
CHECK (snd_pcm_hw_params_set_format (alsa->handle, params, alsa->format),
no_sample_format);
/* set the count of channels */
CHECK (snd_pcm_hw_params_set_channels (alsa->handle, params, alsa->channels),
no_channels);
/* set the stream rate */
rrate = alsa->rate;
CHECK (snd_pcm_hw_params_set_rate_near (alsa->handle, params, &rrate, NULL),
no_rate);
#ifndef GST_DISABLE_GST_DEBUG
/* get and dump some limits */
{
guint min, max;
snd_pcm_hw_params_get_buffer_time_min (params, &min, NULL);
snd_pcm_hw_params_get_buffer_time_max (params, &max, NULL);
GST_DEBUG_OBJECT (alsa, "buffer time %u, min %u, max %u",
alsa->buffer_time, min, max);
snd_pcm_hw_params_get_period_time_min (params, &min, NULL);
snd_pcm_hw_params_get_period_time_max (params, &max, NULL);
GST_DEBUG_OBJECT (alsa, "period time %u, min %u, max %u",
alsa->period_time, min, max);
snd_pcm_hw_params_get_periods_min (params, &min, NULL);
snd_pcm_hw_params_get_periods_max (params, &max, NULL);
GST_DEBUG_OBJECT (alsa, "periods min %u, max %u", min, max);
}
#endif
/* now try to configure the buffer time and period time, if one
* of those fail, we fall back to the defaults and emit a warning. */
if (buffer_time != -1 && !alsa->iec958) {
/* set the buffer time */
if ((err = snd_pcm_hw_params_set_buffer_time_near (alsa->handle, params,
&buffer_time, NULL)) < 0) {
GST_ELEMENT_WARNING (alsa, RESOURCE, SETTINGS, (NULL),
("Unable to set buffer time %i for playback: %s",
buffer_time, snd_strerror (err)));
/* disable buffer_time the next round */
buffer_time = -1;
goto retry;
}
GST_DEBUG_OBJECT (alsa, "buffer time %u", buffer_time);
}
if (period_time != -1 && !alsa->iec958) {
/* set the period time */
if ((err = snd_pcm_hw_params_set_period_time_near (alsa->handle, params,
&period_time, NULL)) < 0) {
GST_ELEMENT_WARNING (alsa, RESOURCE, SETTINGS, (NULL),
("Unable to set period time %i for playback: %s",
period_time, snd_strerror (err)));
/* disable period_time the next round */
period_time = -1;
goto retry;
}
GST_DEBUG_OBJECT (alsa, "period time %u", period_time);
}
/* Set buffer size and period size manually for SPDIF */
if (G_UNLIKELY (alsa->iec958)) {
snd_pcm_uframes_t buffer_size = SPDIF_BUFFER_SIZE;
snd_pcm_uframes_t period_size = SPDIF_PERIOD_SIZE;
CHECK (snd_pcm_hw_params_set_buffer_size_near (alsa->handle, params,
&buffer_size), buffer_size);
CHECK (snd_pcm_hw_params_set_period_size_near (alsa->handle, params,
&period_size, NULL), period_size);
}
/* write the parameters to device */
CHECK (snd_pcm_hw_params (alsa->handle, params), set_hw_params);
/* now get the configured values */
CHECK (snd_pcm_hw_params_get_buffer_size (params, &alsa->buffer_size),
buffer_size);
CHECK (snd_pcm_hw_params_get_period_size (params, &alsa->period_size, NULL),
period_size);
GST_DEBUG_OBJECT (alsa, "buffer size %lu, period size %lu", alsa->buffer_size,
alsa->period_size);
snd_pcm_hw_params_free (params);
return 0;
/* ERRORS */
no_config:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Broken configuration for playback: no configurations available: %s",
snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
wrong_access:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Access type not available for playback: %s", snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
no_sample_format:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Sample format not available for playback: %s", snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
no_channels:
{
gchar *msg = NULL;
if ((alsa->channels) == 1)
msg = g_strdup (_("Could not open device for playback in mono mode."));
if ((alsa->channels) == 2)
msg = g_strdup (_("Could not open device for playback in stereo mode."));
if ((alsa->channels) > 2)
msg =
g_strdup_printf (_
("Could not open device for playback in %d-channel mode."),
alsa->channels);
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, ("%s", msg),
("%s", snd_strerror (err)));
g_free (msg);
snd_pcm_hw_params_free (params);
return err;
}
no_rate:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Rate %iHz not available for playback: %s",
alsa->rate, snd_strerror (err)));
return err;
}
buffer_size:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Unable to get buffer size for playback: %s", snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
period_size:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Unable to get period size for playback: %s", snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
set_hw_params:
{
GST_ELEMENT_ERROR (alsa, RESOURCE, SETTINGS, (NULL),
("Unable to set hw params for playback: %s", snd_strerror (err)));
snd_pcm_hw_params_free (params);
return err;
}
}
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;
}
static int capture(lua_State *lstate) {
char *card;
snd_pcm_sw_params_t *sparams;
int ret, dir, i;
snd_pcm_format_t f, format;
unsigned int rate, buffer_time;
if (rbuf == NULL) {
rbuf = new_ringbuf(jack_sr, CHANNELS, BUFSECS,
0.333, 0.667);
}
getstring(lstate, "card", &card);
lua_pop(lstate, 1);
for (i = 0; i < 20; i++) {
ret = snd_pcm_open(&handle, card, SND_PCM_STREAM_CAPTURE, 0);
if (ret < 0) {
logmsg("can't open %s (%s)\n", card, snd_strerror(ret));
}
else {
break;
}
}
free(card);
if (ret < 0) return 0;
if (hparams != NULL) snd_pcm_hw_params_free(hparams);
snd_pcm_hw_params_malloc(&hparams);
snd_pcm_hw_params_any(handle, hparams);
for (f = format = 0; f < SND_PCM_FORMAT_LAST; f++) {
ret = snd_pcm_hw_params_test_format(handle, hparams, f);
if (ret == 0) {
logmsg("- %s\n", snd_pcm_format_name(f));
format = f;
}
}
ret = snd_pcm_hw_params_set_access(handle, hparams,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (ret < 0) {
logmsg("access %s\n", snd_strerror(ret));
}
ret = snd_pcm_hw_params_set_format(handle, hparams, format);
logmsg("format: %s\n", snd_pcm_format_description(format));
if (ret < 0) {
logmsg("format error %s\n", snd_strerror(ret));
}
snd_pcm_hw_params_get_buffer_time_max(hparams, &buffer_time, 0);
rate = jack_sr;
ret = snd_pcm_hw_params_set_rate(handle, hparams, rate, 0);
logmsg("rate %d\n", rate);
if (ret < 0) logmsg("rate error %s\n", snd_strerror(ret));
snd_pcm_hw_params_set_channels(handle, hparams, CHANNELS);
blocksize = BLOCKSIZE;
snd_pcm_hw_params_set_period_size(handle, hparams, blocksize, 0);
logmsg("period %ld\n", blocksize);
snd_pcm_hw_params_set_buffer_time_near(handle, hparams, &buffer_time, &dir);
logmsg("buffer time %u\n", buffer_time);
if ((ret = snd_pcm_hw_params(handle, hparams)) < 0) {
logmsg("can't set hardware: %s\n",
snd_strerror(ret));
return 0;
}
else logmsg("hardware configd\n");
snd_pcm_sw_params_malloc(&sparams);
snd_pcm_sw_params_current(handle, sparams);
snd_pcm_sw_params_set_avail_min(handle, sparams, blocksize);
snd_pcm_sw_params_set_start_threshold(handle, sparams, 0U);
if ((ret = snd_pcm_sw_params(handle, sparams)) < 0) {
logmsg("can't set software: %s\n",
snd_strerror(ret));
}
else logmsg("software configd\n");
snd_pcm_sw_params_free(sparams);
pthread_create(&thread_id, NULL, dev_thread, NULL);
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;
}
