static void set_params(void)
{
hwparams.format=SND_PCM_FORMAT_S16_LE;
hwparams.channels=2;
hwparams.rate=44100;
snd_pcm_hw_params_t *params;
snd_pcm_sw_params_t *swparams;
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_sw_params_alloca(&swparams);
snd_pcm_hw_params_any(handle, params);
snd_pcm_hw_params_set_format(handle, params, hwparams.format);
snd_pcm_hw_params_set_channels(handle, params, hwparams.channels);
snd_pcm_hw_params_set_rate_near(handle, params, &hwparams.rate, 0);
buffer_time=0;
snd_pcm_hw_params_get_buffer_time_max(params,&buffer_time, 0);
period_time=125000;
snd_pcm_hw_params_set_period_time_near(handle, params,&period_time, 0);
buffer_time = 500000;
snd_pcm_hw_params_set_buffer_time_near(handle, params, &buffer_time, 0);
/*monotonic = */snd_pcm_hw_params_is_monotonic(params);
/*can_pause = */snd_pcm_hw_params_can_pause(params);
printf("sizeof(params) : %d\n",sizeof(params));
snd_pcm_hw_params(handle, params);
snd_pcm_uframes_t buffer_size;
snd_pcm_hw_params_get_period_size(params, &chunk_size, 0);
size_t n=chunk_size;
snd_pcm_sw_params_set_avail_min(handle, swparams, n);
snd_pcm_uframes_t start_threshold, stop_threshold;
start_threshold=22050;
snd_pcm_sw_params_set_start_threshold(handle, swparams, start_threshold);
stop_threshold=22050;
snd_pcm_sw_params_set_stop_threshold(handle, swparams, stop_threshold);
snd_pcm_format_physical_width(hwparams.format);
}
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;
}
bool ALSAWriter::processParams(bool *paramsCorrected)
{
const unsigned chn = getParam("chn").toUInt();
const unsigned rate = getParam("rate").toUInt();
const bool resetAudio = channels != chn || sample_rate != rate;
channels = chn;
sample_rate = rate;
if (resetAudio || err)
{
snd_pcm_hw_params_t *params;
snd_pcm_hw_params_alloca(¶ms);
close();
QString chosenDevName = devName;
if (autoFindMultichannelDevice && channels > 2)
{
bool mustAutoFind = true, forceStereo = false;
if (!snd_pcm_open(&snd, chosenDevName.toLocal8Bit(), SND_PCM_STREAM_PLAYBACK, 0))
{
if (snd_pcm_type(snd) == SND_PCM_TYPE_HW)
{
unsigned max_chn = 0;
snd_pcm_hw_params_any(snd, params);
mustAutoFind = snd_pcm_hw_params_get_channels_max(params, &max_chn) || max_chn < channels;
}
#ifdef HAVE_CHMAP
else if (paramsCorrected)
{
snd_pcm_chmap_query_t **chmaps = snd_pcm_query_chmaps(snd);
if (chmaps)
snd_pcm_free_chmaps(chmaps);
else
forceStereo = true;
}
#endif
snd_pcm_close(snd);
snd = NULL;
}
if (mustAutoFind)
{
QString newDevName;
if (channels <= 4)
newDevName = "surround40";
else if (channels <= 6)
newDevName = "surround51";
else
newDevName = "surround71";
if (!newDevName.isEmpty() && newDevName != chosenDevName)
{
if (ALSACommon::getDevices().first.contains(newDevName))
chosenDevName = newDevName;
else if (forceStereo)
{
channels = 2;
*paramsCorrected = true;
}
}
}
}
if (!chosenDevName.isEmpty())
{
bool sndOpen = !snd_pcm_open(&snd, chosenDevName.toLocal8Bit(), SND_PCM_STREAM_PLAYBACK, 0);
if (devName != chosenDevName)
{
if (sndOpen)
QMPlay2Core.logInfo("ALSA :: " + devName + "\" -> \"" + chosenDevName + "\"");
else
{
sndOpen = !snd_pcm_open(&snd, devName.toLocal8Bit(), SND_PCM_STREAM_PLAYBACK, 0);
QMPlay2Core.logInfo("ALSA :: " + tr("Cannot open") + " \"" + chosenDevName + "\", " + tr("back to") + " \"" + devName + "\"");
}
}
if (sndOpen)
{
snd_pcm_hw_params_any(snd, params);
snd_pcm_format_t fmt = SND_PCM_FORMAT_UNKNOWN;
if (!snd_pcm_hw_params_test_format(snd, params, SND_PCM_FORMAT_S32))
{
fmt = SND_PCM_FORMAT_S32;
sample_size = 4;
}
else if (!snd_pcm_hw_params_test_format(snd, params, SND_PCM_FORMAT_S16))
{
fmt = SND_PCM_FORMAT_S16;
sample_size = 2;
}
else if (!snd_pcm_hw_params_test_format(snd, params, SND_PCM_FORMAT_S8))
{
fmt = SND_PCM_FORMAT_S8;
sample_size = 1;
}
unsigned delay_us = round(delay * 1000000.0);
if (fmt != SND_PCM_FORMAT_UNKNOWN && set_snd_pcm_hw_params(snd, params, fmt, channels, sample_rate, delay_us))
{
bool err2 = false;
if (channels != chn || sample_rate != rate)
{
if (paramsCorrected)
*paramsCorrected = true;
else
err2 = true;
}
if (!err2)
{
err2 = snd_pcm_hw_params(snd, params);
if (err2 && paramsCorrected) //jakiś błąd, próba zmiany sample_rate
{
snd_pcm_hw_params_any(snd, params);
err2 = snd_pcm_hw_params_set_rate_resample(snd, params, false) || !set_snd_pcm_hw_params(snd, params, fmt, channels, sample_rate, delay_us) || snd_pcm_hw_params(snd, params);
if (!err2)
*paramsCorrected = true;
}
if (!err2)
{
modParam("delay", delay_us / 1000000.0);
if (paramsCorrected && *paramsCorrected)
{
modParam("chn", channels);
modParam("rate", sample_rate);
}
canPause = snd_pcm_hw_params_can_pause(params) && snd_pcm_hw_params_can_resume(params);
mustSwapChn = channels == 6 || channels == 8;
#ifdef HAVE_CHMAP
if (mustSwapChn)
{
snd_pcm_chmap_query_t **chmaps = snd_pcm_query_chmaps(snd);
if (chmaps)
{
for (int i = 0; chmaps[i]; ++i)
{
if (chmaps[i]->map.channels >= channels)
{
for (uint j = 0; j < channels; ++j)
{
mustSwapChn &= chmaps[i]->map.pos[j] == j + SND_CHMAP_FL;
if (!mustSwapChn)
break;
}
break;
}
}
snd_pcm_free_chmaps(chmaps);
}
}
#endif
return true;
}
}
}
}
}
err = true;
QMPlay2Core.logError("ALSA :: " + tr("Cannot open audio output stream"));
}
return readyWrite();
}
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;
}
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;
}
/*
open & setup audio device
return: 1=success 0=fail
*/
static int init(int rate_hz, int channels, int format, int flags)
{
unsigned int alsa_buffer_time = 500000; /* 0.5 s */
unsigned int alsa_fragcount = 16;
int err;
int block;
strarg_t device;
snd_pcm_uframes_t chunk_size;
snd_pcm_uframes_t bufsize;
snd_pcm_uframes_t boundary;
const opt_t subopts[] = {
{"block", OPT_ARG_BOOL, &block, NULL},
{"device", OPT_ARG_STR, &device, str_maxlen},
{NULL}
};
char alsa_device[ALSA_DEVICE_SIZE + 1];
// make sure alsa_device is null-terminated even when using strncpy etc.
memset(alsa_device, 0, ALSA_DEVICE_SIZE + 1);
mp_msg(MSGT_AO,MSGL_V,"alsa-init: requested format: %d Hz, %d channels, %x\n", rate_hz,
channels, format);
alsa_handler = NULL;
#if SND_LIB_VERSION >= 0x010005
mp_msg(MSGT_AO,MSGL_V,"alsa-init: using ALSA %s\n", snd_asoundlib_version());
#else
mp_msg(MSGT_AO,MSGL_V,"alsa-init: compiled for ALSA-%s\n", SND_LIB_VERSION_STR);
#endif
snd_lib_error_set_handler(alsa_error_handler);
ao_data.samplerate = rate_hz;
ao_data.format = format;
ao_data.channels = channels;
switch (format)
{
case AF_FORMAT_S8:
alsa_format = SND_PCM_FORMAT_S8;
break;
case AF_FORMAT_U8:
alsa_format = SND_PCM_FORMAT_U8;
break;
case AF_FORMAT_U16_LE:
alsa_format = SND_PCM_FORMAT_U16_LE;
break;
case AF_FORMAT_U16_BE:
alsa_format = SND_PCM_FORMAT_U16_BE;
break;
case AF_FORMAT_AC3_LE:
case AF_FORMAT_S16_LE:
case AF_FORMAT_IEC61937_LE:
alsa_format = SND_PCM_FORMAT_S16_LE;
break;
case AF_FORMAT_AC3_BE:
case AF_FORMAT_S16_BE:
case AF_FORMAT_IEC61937_BE:
alsa_format = SND_PCM_FORMAT_S16_BE;
break;
case AF_FORMAT_U32_LE:
alsa_format = SND_PCM_FORMAT_U32_LE;
break;
case AF_FORMAT_U32_BE:
alsa_format = SND_PCM_FORMAT_U32_BE;
break;
case AF_FORMAT_S32_LE:
alsa_format = SND_PCM_FORMAT_S32_LE;
break;
case AF_FORMAT_S32_BE:
alsa_format = SND_PCM_FORMAT_S32_BE;
break;
case AF_FORMAT_U24_LE:
alsa_format = SND_PCM_FORMAT_U24_3LE;
break;
case AF_FORMAT_U24_BE:
alsa_format = SND_PCM_FORMAT_U24_3BE;
break;
case AF_FORMAT_S24_LE:
alsa_format = SND_PCM_FORMAT_S24_3LE;
break;
case AF_FORMAT_S24_BE:
alsa_format = SND_PCM_FORMAT_S24_3BE;
break;
case AF_FORMAT_FLOAT_LE:
alsa_format = SND_PCM_FORMAT_FLOAT_LE;
break;
case AF_FORMAT_FLOAT_BE:
alsa_format = SND_PCM_FORMAT_FLOAT_BE;
break;
case AF_FORMAT_MU_LAW:
alsa_format = SND_PCM_FORMAT_MU_LAW;
break;
case AF_FORMAT_A_LAW:
alsa_format = SND_PCM_FORMAT_A_LAW;
break;
default:
alsa_format = SND_PCM_FORMAT_MPEG; //? default should be -1
break;
}
//subdevice parsing
// set defaults
block = 1;
/* switch for spdif
* sets opening sequence for SPDIF
* sets also the playback and other switches 'on the fly'
* while opening the abstract alias for the spdif subdevice
* 'iec958'
*/
if (AF_FORMAT_IS_IEC61937(format)) {
device.str = "iec958";
mp_msg(MSGT_AO,MSGL_V,"alsa-spdif-init: playing AC3/iec61937/iec958, %i channels\n", channels);
}
else
/* in any case for multichannel playback we should select
* appropriate device
*/
switch (channels) {
case 1:
case 2:
device.str = "default";
mp_msg(MSGT_AO,MSGL_V,"alsa-init: setup for 1/2 channel(s)\n");
break;
case 4:
if (alsa_format == SND_PCM_FORMAT_FLOAT_LE)
// hack - use the converter plugin
device.str = "plug:surround40";
else
device.str = "surround40";
mp_msg(MSGT_AO,MSGL_V,"alsa-init: device set to surround40\n");
break;
case 6:
if (alsa_format == SND_PCM_FORMAT_FLOAT_LE)
device.str = "plug:surround51";
else
device.str = "surround51";
mp_msg(MSGT_AO,MSGL_V,"alsa-init: device set to surround51\n");
break;
case 8:
if (alsa_format == SND_PCM_FORMAT_FLOAT_LE)
device.str = "plug:surround71";
else
device.str = "surround71";
mp_msg(MSGT_AO,MSGL_V,"alsa-init: device set to surround71\n");
break;
default:
device.str = "default";
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_ChannelsNotSupported,channels);
}
device.len = strlen(device.str);
if (subopt_parse(ao_subdevice, subopts) != 0) {
print_help();
return 0;
}
parse_device(alsa_device, device.str, device.len);
mp_msg(MSGT_AO,MSGL_V,"alsa-init: using device %s\n", alsa_device);
if (!alsa_handler) {
int open_mode = block ? 0 : SND_PCM_NONBLOCK;
int isac3 = AF_FORMAT_IS_IEC61937(format);
//modes = 0, SND_PCM_NONBLOCK, SND_PCM_ASYNC
mp_msg(MSGT_AO,MSGL_V,"alsa-init: opening device in %sblocking mode\n", block ? "" : "non-");
if ((err = try_open_device(alsa_device, open_mode, isac3)) < 0)
{
if (err != -EBUSY && !block) {
mp_msg(MSGT_AO,MSGL_INFO,MSGTR_AO_ALSA_OpenInNonblockModeFailed);
if ((err = try_open_device(alsa_device, 0, isac3)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_PlaybackOpenError, snd_strerror(err));
return 0;
}
} else {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_PlaybackOpenError, snd_strerror(err));
return 0;
}
}
if ((err = snd_pcm_nonblock(alsa_handler, 0)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_ErrorSetBlockMode, snd_strerror(err));
} else {
mp_msg(MSGT_AO,MSGL_V,"alsa-init: device reopened in blocking mode\n");
}
snd_pcm_hw_params_alloca(&alsa_hwparams);
snd_pcm_sw_params_alloca(&alsa_swparams);
// setting hw-parameters
if ((err = snd_pcm_hw_params_any(alsa_handler, alsa_hwparams)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetInitialParameters,
snd_strerror(err));
return 0;
}
err = snd_pcm_hw_params_set_access(alsa_handler, alsa_hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetAccessType,
snd_strerror(err));
return 0;
}
/* workaround for nonsupported formats
sets default format to S16_LE if the given formats aren't supported */
if ((err = snd_pcm_hw_params_test_format(alsa_handler, alsa_hwparams,
alsa_format)) < 0)
{
mp_msg(MSGT_AO,MSGL_INFO,
MSGTR_AO_ALSA_FormatNotSupportedByHardware, af_fmt2str_short(format));
alsa_format = SND_PCM_FORMAT_S16_LE;
if (AF_FORMAT_IS_AC3(ao_data.format))
ao_data.format = AF_FORMAT_AC3_LE;
else if (AF_FORMAT_IS_IEC61937(ao_data.format))
ao_data.format = AF_FORMAT_IEC61937_LE;
else
ao_data.format = AF_FORMAT_S16_LE;
}
if ((err = snd_pcm_hw_params_set_format(alsa_handler, alsa_hwparams,
alsa_format)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetFormat,
snd_strerror(err));
return 0;
}
if ((err = snd_pcm_hw_params_set_channels_near(alsa_handler, alsa_hwparams,
&ao_data.channels)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetChannels,
snd_strerror(err));
return 0;
}
/* workaround for buggy rate plugin (should be fixed in ALSA 1.0.11)
prefer our own resampler, since that allows users to choose the resampler,
even per file if desired */
#if SND_LIB_VERSION >= 0x010009
if ((err = snd_pcm_hw_params_set_rate_resample(alsa_handler, alsa_hwparams,
0)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToDisableResampling,
snd_strerror(err));
return 0;
}
#endif
if ((err = snd_pcm_hw_params_set_rate_near(alsa_handler, alsa_hwparams,
&ao_data.samplerate, NULL)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetSamplerate2,
snd_strerror(err));
return 0;
}
bytes_per_sample = af_fmt2bits(ao_data.format) / 8;
bytes_per_sample *= ao_data.channels;
ao_data.bps = ao_data.samplerate * bytes_per_sample;
if ((err = snd_pcm_hw_params_set_buffer_time_near(alsa_handler, alsa_hwparams,
&alsa_buffer_time, NULL)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetBufferTimeNear,
snd_strerror(err));
return 0;
}
if ((err = snd_pcm_hw_params_set_periods_near(alsa_handler, alsa_hwparams,
&alsa_fragcount, NULL)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetPeriods,
snd_strerror(err));
return 0;
}
/* finally install hardware parameters */
if ((err = snd_pcm_hw_params(alsa_handler, alsa_hwparams)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetHwParameters,
snd_strerror(err));
return 0;
}
// end setting hw-params
// gets buffersize for control
if ((err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams, &bufsize)) < 0)
{
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetBufferSize, snd_strerror(err));
return 0;
}
else {
ao_data.buffersize = bufsize * bytes_per_sample;
mp_msg(MSGT_AO,MSGL_V,"alsa-init: got buffersize=%i\n", ao_data.buffersize);
}
if ((err = snd_pcm_hw_params_get_period_size(alsa_hwparams, &chunk_size, NULL)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetPeriodSize, snd_strerror(err));
return 0;
} else {
mp_msg(MSGT_AO,MSGL_V,"alsa-init: got period size %li\n", chunk_size);
}
ao_data.outburst = chunk_size * bytes_per_sample;
/* setting software parameters */
if ((err = snd_pcm_sw_params_current(alsa_handler, alsa_swparams)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetSwParameters,
snd_strerror(err));
return 0;
}
#if SND_LIB_VERSION >= 0x000901
if ((err = snd_pcm_sw_params_get_boundary(alsa_swparams, &boundary)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetBoundary,
snd_strerror(err));
return 0;
}
#else
boundary = 0x7fffffff;
#endif
/* start playing when one period has been written */
if ((err = snd_pcm_sw_params_set_start_threshold(alsa_handler, alsa_swparams, chunk_size)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetStartThreshold,
snd_strerror(err));
return 0;
}
/* disable underrun reporting */
if ((err = snd_pcm_sw_params_set_stop_threshold(alsa_handler, alsa_swparams, boundary)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetStopThreshold,
snd_strerror(err));
return 0;
}
#if SND_LIB_VERSION >= 0x000901
/* play silence when there is an underrun */
if ((err = snd_pcm_sw_params_set_silence_size(alsa_handler, alsa_swparams, boundary)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToSetSilenceSize,
snd_strerror(err));
return 0;
}
#endif
if ((err = snd_pcm_sw_params(alsa_handler, alsa_swparams)) < 0) {
mp_msg(MSGT_AO,MSGL_ERR,MSGTR_AO_ALSA_UnableToGetSwParameters,
snd_strerror(err));
return 0;
}
/* end setting sw-params */
mp_msg(MSGT_AO,MSGL_V,"alsa: %d Hz/%d channels/%d bpf/%d bytes buffer/%s\n",
ao_data.samplerate, ao_data.channels, (int)bytes_per_sample, ao_data.buffersize,
snd_pcm_format_description(alsa_format));
} // end switch alsa_handler (spdif)
alsa_can_pause = snd_pcm_hw_params_can_pause(alsa_hwparams);
return 1;
} // end init
/**************************************************************************
* wodPlayer_ProcessMessages [internal]
*/
static void wodPlayer_ProcessMessages(WINE_WAVEDEV* wwo)
{
LPWAVEHDR lpWaveHdr;
enum win_wm_message msg;
DWORD_PTR param;
HANDLE ev;
int err;
while (ALSA_RetrieveRingMessage(&wwo->msgRing, &msg, ¶m, &ev)) {
TRACE("Received %s %lx\n", ALSA_getCmdString(msg), param);
switch (msg) {
case WINE_WM_PAUSING:
if ( snd_pcm_state(wwo->pcm) == SND_PCM_STATE_RUNNING )
{
if ( snd_pcm_hw_params_can_pause(wwo->hw_params) )
{
err = snd_pcm_pause(wwo->pcm, 1);
if ( err < 0 )
ERR("pcm_pause failed: %s\n", snd_strerror(err));
wwo->state = WINE_WS_PAUSED;
}
else
{
wodPlayer_Reset(wwo,FALSE);
}
}
SetEvent(ev);
break;
case WINE_WM_RESTARTING:
if (wwo->state == WINE_WS_PAUSED)
{
if ( snd_pcm_state(wwo->pcm) == SND_PCM_STATE_PAUSED )
{
err = snd_pcm_pause(wwo->pcm, 0);
if ( err < 0 )
ERR("pcm_pause failed: %s\n", snd_strerror(err));
}
wwo->state = WINE_WS_PLAYING;
}
SetEvent(ev);
break;
case WINE_WM_HEADER:
lpWaveHdr = (LPWAVEHDR)param;
/* insert buffer at the end of queue */
{
LPWAVEHDR* wh;
for (wh = &(wwo->lpQueuePtr); *wh; wh = &((*wh)->lpNext));
*wh = lpWaveHdr;
}
if (!wwo->lpPlayPtr)
wodPlayer_BeginWaveHdr(wwo,lpWaveHdr);
if (wwo->state == WINE_WS_STOPPED)
wwo->state = WINE_WS_PLAYING;
break;
case WINE_WM_RESETTING:
wodPlayer_Reset(wwo,TRUE);
SetEvent(ev);
break;
case WINE_WM_BREAKLOOP:
if (wwo->state == WINE_WS_PLAYING && wwo->lpLoopPtr != NULL) {
/* ensure exit at end of current loop */
wwo->dwLoops = 1;
}
SetEvent(ev);
break;
case WINE_WM_CLOSING:
/* sanity check: this should not happen since the device must have been reset before */
if (wwo->lpQueuePtr || wwo->lpPlayPtr) ERR("out of sync\n");
wwo->hThread = 0;
wwo->state = WINE_WS_CLOSED;
SetEvent(ev);
ExitThread(0);
/* shouldn't go here */
default:
FIXME("unknown message %d\n", msg);
break;
}
}
}
static int ao_alsa_init(dtaudio_output_t *aout, dtaudio_para_t *para)
{
memcpy(&wrapper->para, para, sizeof(dtaudio_para_t));
snd_pcm_t *alsa_handle;
snd_pcm_hw_params_t *alsa_hwparams;
snd_pcm_sw_params_t *alsa_swparams;
snd_pcm_uframes_t size;
snd_pcm_uframes_t boundary;
alsa_ctx_t *ctx = (alsa_ctx_t *)malloc(sizeof(*ctx));
if (!ctx) {
return -1;
}
wrapper->ao_priv = ctx;
int afmt = format_to_alsa(wrapper->para.bps);
uint32_t channels = wrapper->para.dst_channels;
uint32_t sr = wrapper->para.dst_samplerate;
int bytes_per_sample = snd_pcm_format_physical_width(afmt) * channels / 8;
int err = 0;
err = snd_pcm_open(&alsa_handle, "default", SND_PCM_STREAM_PLAYBACK, 0);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
free(ctx);
wrapper->ao_priv = NULL;
return -1;
}
snd_pcm_hw_params_alloca(&alsa_hwparams);
snd_pcm_sw_params_alloca(&alsa_swparams);
err = snd_pcm_hw_params_any(alsa_handle, alsa_hwparams);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_hw_params_set_access(alsa_handle, alsa_hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_hw_params_set_format(alsa_handle, alsa_hwparams, afmt);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_hw_params_set_channels_near(alsa_handle, alsa_hwparams,
&channels);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_hw_params_set_rate_near(alsa_handle, alsa_hwparams, &sr, NULL);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_hw_params(alsa_handle, alsa_hwparams);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
/******************************************************************
* Set HW Params Finish
******************************************************************/
/* buffer size means the entire size of alsa pcm buffer size*/
err = snd_pcm_hw_params_get_buffer_size(alsa_hwparams, &size);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
ctx->buf_size = size * bytes_per_sample;
/*period size means count processed every interrupt*/
err = snd_pcm_hw_params_get_period_size(alsa_hwparams, &size, NULL);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
ctx->trunk_size = size * bytes_per_sample;
dt_info(TAG, "outburst: %d, bytes_per_sample: %d, buffersize: %d\n",
ctx->trunk_size, bytes_per_sample, ctx->buf_size);
/******************************************************************
* set sw params
******************************************************************/
err = snd_pcm_sw_params_current(alsa_handle, alsa_swparams);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
#if SND_LIB_VERSION >= 0x000901
err = snd_pcm_sw_params_get_boundary(alsa_swparams, &boundary);
#else
boundary = 0x7fffffff;
#endif
err = snd_pcm_sw_params_set_start_threshold(alsa_handle, alsa_swparams, size);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
err = snd_pcm_sw_params_set_stop_threshold(alsa_handle, alsa_swparams,
boundary);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
#if SND_LIB_VERSION >= 0x000901
err = snd_pcm_sw_params_set_silence_size(alsa_handle, alsa_swparams, boundary);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
#endif
err = snd_pcm_sw_params(alsa_handle, alsa_swparams);
if (err < 0) {
dt_error(TAG, "%s,%d: %s\n", __func__, __LINE__, snd_strerror(err));
return -1;
}
ctx->pause_support = snd_pcm_hw_params_can_pause(alsa_hwparams);
//buf size limit
ctx->buf_threshold = bytes_per_sample * sr * DEFAULT_TIME_SIZE / 1000;
dt_info(TAG, "alsa audio init ok! outburst:%d thres:%d \n", ctx->trunk_size,
ctx->buf_threshold);
ctx->handle = alsa_handle;
ctx->channels = wrapper->para.dst_channels;
ctx->bps = wrapper->para.bps;
ctx->samplerate = wrapper->para.dst_samplerate;
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;
}
bool
AlsaSource::SetupHW ()
{
bool result = false;
bool rw_available = false;
bool mmap_available = false;
#if DEBUG
bool debug = debug_flags & RUNTIME_DEBUG_AUDIO;
#else
bool debug = false;
#endif
snd_pcm_hw_params_t *params = NULL;
snd_output_t *output = NULL;
guint32 buffer_time = 100000; // request 0.1 seconds of buffer time.
int err = 0;
int dir = 0;
unsigned int rate = GetSampleRate ();
unsigned int actual_rate = rate;
guint32 channels = GetChannels ();
if (debug) {
err = snd_output_stdio_attach (&output, stdout, 0);
if (err < 0)
LOG_AUDIO ("AlsaSource::SetupHW (): Could not create alsa output: %s\n", snd_strerror (err));
}
err = snd_pcm_hw_params_malloc (¶ms);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (malloc): %s\n", snd_strerror (err));
return false;
}
// choose all parameters
err = snd_pcm_hw_params_any (pcm, params);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (no configurations available): %s\n", snd_strerror (err));
goto cleanup;
}
if (debug && output != NULL) {
LOG_AUDIO ("AlsaSource::SetupHW (): hw configurations:\n");
snd_pcm_hw_params_dump (params, output);
}
// enable software resampling
err = snd_pcm_hw_params_set_rate_resample (pcm, params, 1);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (could not enable resampling): %s\n", snd_strerror (err));
goto cleanup;
}
// test for available transfer modes
if (!(moonlight_flags & RUNTIME_INIT_AUDIO_ALSA_MMAP)) {
err = snd_pcm_hw_params_test_access (pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup: RW access mode not supported (%s).\n", snd_strerror (err));
} else {
rw_available = true;
}
}
if (!(moonlight_flags & RUNTIME_INIT_AUDIO_ALSA_RW)) {
err = snd_pcm_hw_params_test_access (pcm, params, SND_PCM_ACCESS_MMAP_INTERLEAVED);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup: MMAP access mode not supported (%s).\n", snd_strerror (err));
} else {
mmap_available = true;
}
}
if (mmap_available) {
mmap = true;
} else if (rw_available) {
mmap = false;
} else {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed, no available access mode\n");
goto cleanup;
}
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup: using %s access mode.\n", mmap ? "MMAP" : "RW");
// set transfer mode (mmap or rw in our case)
err = snd_pcm_hw_params_set_access (pcm, params, mmap ? SND_PCM_ACCESS_MMAP_INTERLEAVED : SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (access type not available for playback): %s\n", snd_strerror (err));
goto cleanup;
}
// set audio format
switch (GetInputBytesPerSample ()) {
case 1: // 8 bit audio
err = snd_pcm_hw_params_set_format (pcm, params, SND_PCM_FORMAT_S16);
SetOutputBytesPerSample (2);
break;
case 2: // 16 bit audio
err = snd_pcm_hw_params_set_format (pcm, params, SND_PCM_FORMAT_S16);
SetOutputBytesPerSample (2);
break;
case 3: // 24 bit audio
// write as 32 bit audio, this is a lot easier to write to than 24 bit.
err = snd_pcm_hw_params_set_format (pcm, params, SND_PCM_FORMAT_S32);
SetOutputBytesPerSample (4);
break;
default:
LOG_AUDIO ("AlsaSource::SetupHW (): Invalid input bytes per sample, expected 1, 2 or 3, got %i\n", GetInputBytesPerSample ());
goto cleanup;
}
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (sample format not available for playback): %s\n", snd_strerror (err));
goto cleanup;
}
// set channel count
err = snd_pcm_hw_params_set_channels (pcm, params, channels);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (channels count %i not available for playback): %s\n", channels, snd_strerror (err));
goto cleanup;
}
// set sample rate
err = snd_pcm_hw_params_set_rate_near (pcm, params, &actual_rate, 0);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (sample rate %i Hz not available for playback): %s\n", rate, snd_strerror (err));
goto cleanup;
} else if (actual_rate != rate) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (sample rate %i Hz not available for playback, only got %i Hz).\n", rate, actual_rate);
goto cleanup;
}
// set the buffer time
err = snd_pcm_hw_params_set_buffer_time_near (pcm, params, &buffer_time, &dir);
if (err < 0) {
LOG_AUDIO ("AudioNode::SetupHW (): Audio HW setup failed (unable to set buffer time %i for playback: %s\n", buffer_time, snd_strerror (err));
goto cleanup;
}
// write the parameters to device
err = snd_pcm_hw_params (pcm, params);
if (err < 0) {
LOG_AUDIO ("AlsaSource::SetupHW (): Audio HW setup failed (unable to set hw params for playback: %s)\n", snd_strerror (err));
if (debug && output != NULL) {
LOG_AUDIO ("AlsaSource::SetupHW (): current hw configurations:\n");
snd_pcm_hw_params_dump (params, output);
}
goto cleanup;
}
if (debug) {
LOG_AUDIO ("AlsaSource::SetupHW (): hardware pause support: %s\n", snd_pcm_hw_params_can_pause (params) == 0 ? "no" : "yes");
LOG_AUDIO ("AlsaSource::SetupHW (): succeeded\n");
if (output != NULL)
snd_pcm_hw_params_dump (params, output);
}
result = true;
cleanup:
snd_pcm_hw_params_free (params);
return result;
}
static void *alsa_init(const char *device, unsigned rate, unsigned latency)
{
alsa_t *alsa = (alsa_t*)calloc(1, sizeof(alsa_t));
if (!alsa)
return NULL;
snd_pcm_hw_params_t *params = NULL;
snd_pcm_sw_params_t *sw_params = NULL;
unsigned latency_usec = latency * 1000;
unsigned channels = 2;
unsigned periods = 4;
snd_pcm_format_t format;
const char *alsa_dev = "default";
if (device)
alsa_dev = device;
snd_pcm_uframes_t buffer_size;
TRY_ALSA(snd_pcm_open(&alsa->pcm, alsa_dev, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK));
TRY_ALSA(snd_pcm_hw_params_malloc(¶ms));
alsa->has_float = find_float_format(alsa->pcm, params);
format = alsa->has_float ? SND_PCM_FORMAT_FLOAT : SND_PCM_FORMAT_S16;
TRY_ALSA(snd_pcm_hw_params_any(alsa->pcm, params));
TRY_ALSA(snd_pcm_hw_params_set_access(alsa->pcm, params, SND_PCM_ACCESS_RW_INTERLEAVED));
TRY_ALSA(snd_pcm_hw_params_set_format(alsa->pcm, params, format));
TRY_ALSA(snd_pcm_hw_params_set_channels(alsa->pcm, params, channels));
TRY_ALSA(snd_pcm_hw_params_set_rate(alsa->pcm, params, rate, 0));
TRY_ALSA(snd_pcm_hw_params_set_buffer_time_near(alsa->pcm, params, &latency_usec, NULL));
TRY_ALSA(snd_pcm_hw_params_set_periods_near(alsa->pcm, params, &periods, NULL));
TRY_ALSA(snd_pcm_hw_params(alsa->pcm, params));
snd_pcm_hw_params_get_period_size(params, &buffer_size, NULL);
RARCH_LOG("ALSA: Period size: %d frames\n", (int)buffer_size);
snd_pcm_hw_params_get_buffer_size(params, &buffer_size);
RARCH_LOG("ALSA: Buffer size: %d frames\n", (int)buffer_size);
alsa->buffer_size = snd_pcm_frames_to_bytes(alsa->pcm, buffer_size);
alsa->can_pause = snd_pcm_hw_params_can_pause(params);
RARCH_LOG("ALSA: Can pause: %s.\n", alsa->can_pause ? "yes" : "no");
TRY_ALSA(snd_pcm_sw_params_malloc(&sw_params));
TRY_ALSA(snd_pcm_sw_params_current(alsa->pcm, sw_params));
TRY_ALSA(snd_pcm_sw_params_set_start_threshold(alsa->pcm, sw_params, buffer_size / 2));
TRY_ALSA(snd_pcm_sw_params(alsa->pcm, sw_params));
snd_pcm_hw_params_free(params);
snd_pcm_sw_params_free(sw_params);
return alsa;
error:
RARCH_ERR("ALSA: Failed to initialize...\n");
if (params)
snd_pcm_hw_params_free(params);
if (sw_params)
snd_pcm_sw_params_free(sw_params);
if (alsa)
{
if (alsa->pcm)
snd_pcm_close(alsa->pcm);
free(alsa);
}
return NULL;
}
/**************************************************************************
* ALSA_TraceParameters [internal]
*
* used to trace format changes, hw and sw parameters
*/
void ALSA_TraceParameters(snd_pcm_hw_params_t * hw_params, snd_pcm_sw_params_t * sw, int full)
{
int err;
snd_pcm_format_t format;
snd_pcm_access_t access;
#define X(x) ((x)? "true" : "false")
if (full)
TRACE("FLAGS: sampleres=%s overrng=%s pause=%s resume=%s syncstart=%s batch=%s block=%s double=%s "
"halfd=%s joint=%s\n",
X(snd_pcm_hw_params_can_mmap_sample_resolution(hw_params)),
X(snd_pcm_hw_params_can_overrange(hw_params)),
X(snd_pcm_hw_params_can_pause(hw_params)),
X(snd_pcm_hw_params_can_resume(hw_params)),
X(snd_pcm_hw_params_can_sync_start(hw_params)),
X(snd_pcm_hw_params_is_batch(hw_params)),
X(snd_pcm_hw_params_is_block_transfer(hw_params)),
X(snd_pcm_hw_params_is_double(hw_params)),
X(snd_pcm_hw_params_is_half_duplex(hw_params)),
X(snd_pcm_hw_params_is_joint_duplex(hw_params)));
#undef X
err = snd_pcm_hw_params_get_access(hw_params, &access);
if (err >= 0)
{
TRACE("access=%s\n", snd_pcm_access_name(access));
}
else
{
snd_pcm_access_mask_t * acmask;
acmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_access_mask_sizeof());
snd_pcm_hw_params_get_access_mask(hw_params, acmask);
for ( access = SND_PCM_ACCESS_MMAP_INTERLEAVED; access <= SND_PCM_ACCESS_LAST; access++)
if (snd_pcm_access_mask_test(acmask, access))
TRACE("access=%s\n", snd_pcm_access_name(access));
HeapFree( GetProcessHeap(), 0, acmask );
}
err = snd_pcm_hw_params_get_format(hw_params, &format);
if (err >= 0)
{
TRACE("format=%s\n", snd_pcm_format_name(format));
}
else
{
snd_pcm_format_mask_t * fmask;
fmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_format_mask_sizeof());
snd_pcm_hw_params_get_format_mask(hw_params, fmask);
for ( format = SND_PCM_FORMAT_S8; format <= SND_PCM_FORMAT_LAST ; format++)
if ( snd_pcm_format_mask_test(fmask, format) )
TRACE("format=%s\n", snd_pcm_format_name(format));
HeapFree( GetProcessHeap(), 0, fmask );
}
do {
int err=0;
unsigned int val=0;
err = snd_pcm_hw_params_get_channels(hw_params, &val);
if (err<0) {
unsigned int min = 0;
unsigned int max = 0;
err = snd_pcm_hw_params_get_channels_min(hw_params, &min),
err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
TRACE("channels_min=%u, channels_min_max=%u\n", min, max);
} else {
TRACE("channels=%d\n", val);
}
} while(0);
do {
int err=0;
snd_pcm_uframes_t val=0;
err = snd_pcm_hw_params_get_buffer_size(hw_params, &val);
if (err<0) {
snd_pcm_uframes_t min = 0;
snd_pcm_uframes_t max = 0;
err = snd_pcm_hw_params_get_buffer_size_min(hw_params, &min),
err = snd_pcm_hw_params_get_buffer_size_max(hw_params, &max);
TRACE("buffer_size_min=%lu, buffer_size_min_max=%lu\n", min, max);
} else {
TRACE("buffer_size=%lu\n", val);
}
} while(0);
#define X(x) do { \
int err=0; \
int dir=0; \
unsigned int val=0; \
err = snd_pcm_hw_params_get_##x(hw_params,&val, &dir); \
if (err<0) { \
unsigned int min = 0; \
unsigned int max = 0; \
err = snd_pcm_hw_params_get_##x##_min(hw_params, &min, &dir); \
err = snd_pcm_hw_params_get_##x##_max(hw_params, &max, &dir); \
TRACE(#x "_min=%u " #x "_max=%u\n", min, max); \
} else \
TRACE(#x "=%d\n", val); \
} while(0)
X(rate);
X(buffer_time);
X(periods);
do {
int err=0;
int dir=0;
snd_pcm_uframes_t val=0;
err = snd_pcm_hw_params_get_period_size(hw_params, &val, &dir);
if (err<0) {
snd_pcm_uframes_t min = 0;
snd_pcm_uframes_t max = 0;
err = snd_pcm_hw_params_get_period_size_min(hw_params, &min, &dir),
err = snd_pcm_hw_params_get_period_size_max(hw_params, &max, &dir);
TRACE("period_size_min=%lu, period_size_min_max=%lu\n", min, max);
} else {
TRACE("period_size=%lu\n", val);
}
} while(0);
X(period_time);
#undef X
if (!sw)
return;
}
int main()
{
long loops;
int rc,i = 0;
int size;
FILE *fp ;
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
unsigned int val,val2;
int dir;
snd_pcm_uframes_t frames;
char *buffer;
if( (fp =fopen("sound.wav","w")) < 0)
printf("open sound.wav fial\n");
/* Open PCM device for recording (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);
/* 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);
/* Set period size to 32 frames. */
frames = 32;
snd_pcm_hw_params_set_period_size_near(handle, params, &frames, &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);
}
/* Use a buffer large enough to hold one period */
snd_pcm_hw_params_get_period_size(params, &frames, &dir);
size = frames * 4; /* 2 bytes/sample, 2 channels */
printf("size = %d\n",size);
buffer = (char *) malloc(size);
/* We want to loop for 5 seconds */
snd_pcm_hw_params_get_period_time(params, &val, &dir);
loops = 10000000 / val;
while (loops > 0)
{
loops--;
rc = snd_pcm_readi(handle, buffer, frames);
printf("%d\n",i++);
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);
}
//rc = fwrite( buffer,1, size,fp);
rc = write(1,buffer,size);
if (rc != size)
fprintf(stderr, "short write: wrote %d bytes/n", rc);
else printf("fwrite buffer success\n");
}
/******************打印参数*********************/
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_drain(handle);
snd_pcm_close(handle);
fclose(fp);
free(buffer);
return 0;
}
int main() {
int result;
snd_pcm_t *handle = NULL;
snd_pcm_hw_params_t *params = NULL;
snd_pcm_uframes_t frames;
snd_pcm_access_t access;
snd_pcm_format_t format;
unsigned int rate = 44100;
unsigned int val, val2;
int dir = 0;
const char *device = getenv ("ALSA_DEFAULT");
if (device == NULL) {
device = "default";
}
result = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0);
if (result < 0)
showErrorAndExit(result, "Error: Unable to open PCM device: %s\n");
result = snd_pcm_hw_params_malloc(¶ms);
if (result < 0)
showErrorAndExit(result, "Error: No memory for hardware parameters: %s\n");
result = snd_pcm_hw_params_any(handle, params);
if (result < 0)
showErrorAndExit(result, "Error: Cannot read HW params: %s\n");
result = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (result < 0)
showErrorAndExit(result, "Could not set access method: %s\n");
result = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
if (result < 0)
showErrorAndExit(result, "Error: Could not set output format: %s\n");
result = snd_pcm_hw_params_set_channels(handle, params, 1);
if (result < 0)
showErrorAndExit(result, "Error: Cannot set to 1 channel: %s\n");
result = snd_pcm_hw_params_set_rate_near(handle, params, &rate, &dir);
if (result < 0)
showErrorAndExit(result, "Error: Could not set rate: %s\n");
result = snd_pcm_hw_params(handle, params);
if (result < 0)
showErrorAndExit(result, "Error: Could not write HW params: %s\n");
printf("Card Parameters\n");
printf("%30s: %s\n", "Alsa Library Version", snd_asoundlib_version());
result = snd_pcm_hw_params_get_access(params, &access);
if (result < 0) {
showErrorAndExit(result, "Error: Could not retrieve access mode: %s\n");
} else {
printf("%30s: %s\n", "Access Method", snd_pcm_access_name(access));
}
result = snd_pcm_hw_params_get_format(params, &format);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve format type: %d\n");
} else {
printf("%30s: %s\n", "Format", snd_pcm_format_name(format));
}
result = snd_pcm_hw_params_get_channels(params, &val);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve channel count: %s\n");
} else {
printf("%30s: %d\n", "Channels", val);
}
result = snd_pcm_hw_params_get_rate(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve rate: %s\n");
} else {
printf("%30s: %d bps\n", "Rate", val);
}
result = snd_pcm_hw_params_get_period_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve period time: %s\n");
} else {
printf("%30s: %d us\n", "Period Time", val);
}
result = snd_pcm_hw_params_get_period_size(params, &frames, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve period size: %s\n");
} else {
printf("%30s: %d frames\n", "Period Size", (int) frames);
}
result = snd_pcm_hw_params_get_buffer_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve buffer time: %s\n");
} else {
printf("%30s: %d us\n", "Buffer Time", val);
}
result = snd_pcm_hw_params_get_buffer_size(params, &frames);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to retrieve buffer size: %s\n");
} else {
printf("%30s: %d frames\n", "Buffer Size", (int) frames);
}
result = snd_pcm_hw_params_get_periods(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to get buffer periods: %s\n");
} else {
printf("%30s: %d frames\n", "Periods per Buffer", val);
}
result = snd_pcm_hw_params_get_rate_numden(params, &val, &val2);
if (result < 0) {
showErrorAndExit(result, "Error: Unable to get rate numerator/denominator: %s\n");
} else {
printf("%30s: %d/%d bps\n", "Exact Rate", val, val2);
}
val = snd_pcm_hw_params_get_sbits(params);
printf("%30s: %d\n", "Significant Bits", val);
result = snd_pcm_hw_params_get_tick_time(params, &val, &dir);
if (result < 0) {
showErrorAndExit(result, "Error: Could not retrieve tick time: %s\n");
} else {
printf("%30s: %d\n", "Tick Time", val);
}
printf("Card Capabilities\n");
val = snd_pcm_hw_params_is_batch(params);
printf("%30s: %s\n", "Batch Transfer", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_block_transfer(params);
printf("%30s: %s\n", "Block Transfer", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_double(params);
printf("%30s: %s\n", "Double Buffering", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_half_duplex(params);
printf("%30s: %s\n", "Half Duplex Only", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_is_joint_duplex(params);
printf("%30s: %s\n", "Joint Duplex Capable", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_overrange(params);
printf("%30s: %s\n", "Support Overrange Detection", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_mmap_sample_resolution(params);
printf("%30s: %s\n", "Support Sample-res Mmap", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_pause(params);
printf("%30s: %s\n", "Can Pause", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_resume(params);
printf("%30s: %s\n", "Can Resume", (val ? "Yes" : "No"));
val = snd_pcm_hw_params_can_sync_start(params);
printf("%30s: %s\n", "Support Sync Start", (val ? "Yes" : "No"));
result = snd_pcm_close(handle);
if (result < 0)
showErrorAndExit(result, "Error: Could not close PCM device: %s\n");
return 0;
}
static size_t
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(AHandle, params);
if (err < 0) {
fprintf(stderr, "Broken configuration for this PCM: no configurations available");
exit (1);
}
err = snd_pcm_hw_params_set_access(AHandle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
if (err < 0) {
fprintf(stderr, "Access type not available");
exit(1);
}
err = snd_pcm_hw_params_set_format(AHandle, params, DEFAULT_FORMAT);
if (err < 0) {
fprintf(stderr, "Sample format non available");
exit(1);
}
err = snd_pcm_hw_params_set_channels(AHandle, params, CHANNELS);
if (err < 0) {
fprintf(stderr, "Channels count non available");
exit(1);
}
rate = DEFAULT_SPEED;
hwparams.rate=DEFAULT_SPEED;
hwparams.format=DEFAULT_FORMAT;
hwparams.channels=CHANNELS;
err = snd_pcm_hw_params_set_rate_near(AHandle, params, &hwparams.rate, 0);
assert(err >= 0);
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(AHandle, params,
&period_time, 0);
else
err = snd_pcm_hw_params_set_period_size_near(AHandle, params,
&period_frames, 0);
assert(err >= 0);
if (buffer_time > 0) {
err = snd_pcm_hw_params_set_buffer_time_near(AHandle, params,
&buffer_time, 0);
} else {
err = snd_pcm_hw_params_set_buffer_size_near(AHandle, params,
&buffer_frames);
}
assert(err >= 0);
monotonic = snd_pcm_hw_params_is_monotonic(params);
can_pause = snd_pcm_hw_params_can_pause(params);
err = snd_pcm_hw_params(AHandle, params);
if (err < 0) {
fprintf(stderr, "Unable to install hw params:");
snd_pcm_hw_params_dump(params, Log);
exit(1);
}
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) {
fprintf(stderr, "Can't use period equal to buffer size (%lu == %lu)",
chunk_size, buffer_size);
exit(1);
}
snd_pcm_sw_params_current(AHandle, swparams);
if (avail_min < 0)
n = chunk_size;
else
n = (double) rate * avail_min / 1000000;
err = snd_pcm_sw_params_set_avail_min(AHandle, swparams, 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(AHandle, 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(AHandle, swparams, stop_threshold);
assert(err >= 0);
if (snd_pcm_sw_params(AHandle, swparams) < 0) {
fprintf(stderr, "unable to install sw params:");
snd_pcm_sw_params_dump(swparams, Log);
exit(1);
}
snd_pcm_dump(AHandle, Log);
bits_per_sample = snd_pcm_format_physical_width(DEFAULT_FORMAT);
bits_per_frame = bits_per_sample * hwparams.channels;
chunk_bytes = chunk_size * bits_per_frame / 8;
buffer_frames = buffer_size; /* for position test */
return chunk_bytes;
}
bool OutputALSA::initialize(quint32 freq, ChannelMap map, Qmmp::AudioFormat format)
{
m_inited = false;
if (pcm_handle)
return false;
if (snd_pcm_open(&pcm_handle, pcm_name, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK) < 0)
{
qWarning ("OutputALSA: Error opening PCM device %s", pcm_name);
return false;
}
// we need to configure
uint rate = freq; /* Sample rate */
uint exact_rate = freq; /* Sample rate returned by */
/* load settings from config */
QSettings settings(Qmmp::configFile(), QSettings::IniFormat);
settings.beginGroup("ALSA");
uint buffer_time = settings.value("buffer_time",500).toUInt()*1000;
uint period_time = settings.value("period_time",100).toUInt()*1000;
bool use_pause = settings.value("use_snd_pcm_pause", false).toBool();
settings.endGroup();
snd_pcm_hw_params_t *hwparams = 0;
snd_pcm_sw_params_t *swparams = 0;
int err; //alsa error code
//hw params
snd_pcm_hw_params_alloca(&hwparams);
if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0)
{
qWarning("OutputALSA: Can not read configuration for PCM device: %s", snd_strerror(err));
return false;
}
if (m_use_mmap)
{
if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0)
{
qWarning("OutputALSA: Error setting mmap access: %s", snd_strerror(err));
m_use_mmap = false;
}
}
if (!m_use_mmap)
{
if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
qWarning("OutputALSA: Error setting access: %s", snd_strerror(err));
return false;
}
}
snd_pcm_format_t alsa_format = SND_PCM_FORMAT_UNKNOWN;
switch (format)
{
case Qmmp::PCM_S8:
alsa_format = SND_PCM_FORMAT_S8;
break;
case Qmmp::PCM_S16LE:
alsa_format = SND_PCM_FORMAT_S16_LE;
break;
case Qmmp::PCM_S24LE:
alsa_format = SND_PCM_FORMAT_S24_LE;
break;
case Qmmp::PCM_S32LE:
alsa_format = SND_PCM_FORMAT_S32_LE;
break;
default:
qWarning("OutputALSA: unsupported format detected");
return false;
}
if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, alsa_format)) < 0)
{
qDebug("OutputALSA: Error setting format: %s", snd_strerror(err));
return false;
}
exact_rate = rate;
if ((err = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &exact_rate, 0)) < 0)
{
qWarning("OutputALSA: Error setting rate: %s", snd_strerror(err));
return false;
}
if (rate != exact_rate)
{
qWarning("OutputALSA: The rate %d Hz is not supported by your hardware.\n==> Using %d Hz instead.", rate, exact_rate);
rate = exact_rate;
}
uint c = map.count();
if ((err = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0)
{
qWarning("OutputALSA: Error setting channels: %s", snd_strerror(err));
return false;
}
if (c != (uint)map.count())
{
qWarning("OutputALSA: The channel number %d is not supported by your hardware", map.count());
qWarning("==> Using %d instead.", c);
}
if ((err = snd_pcm_hw_params_set_period_time_near(pcm_handle, hwparams, &period_time ,0)) < 0)
{
qWarning("OutputALSA: Error setting period time: %s", snd_strerror(err));
return false;
}
if ((err = snd_pcm_hw_params_set_buffer_time_near(pcm_handle, hwparams, &buffer_time ,0)) < 0)
{
qWarning("OutputALSA: Error setting buffer time: %s", snd_strerror(err));
return false;
}
if ((err = snd_pcm_hw_params(pcm_handle, hwparams)) < 0)
{
qWarning("OutputALSA: Error setting HW params: %s", snd_strerror(err));
return false;
}
//read some alsa parameters
snd_pcm_uframes_t buffer_size = 0;
snd_pcm_uframes_t period_size = 0;
if ((err = snd_pcm_hw_params_get_buffer_size(hwparams, &buffer_size)) < 0)
{
qWarning("OutputALSA: Error reading buffer size: %s", snd_strerror(err));
return false;
}
if ((err = snd_pcm_hw_params_get_period_size(hwparams, &period_size, 0)) < 0)
{
qWarning("OutputALSA: Error reading period size: %s", snd_strerror(err));
return false;
}
//swparams
snd_pcm_sw_params_alloca(&swparams);
snd_pcm_sw_params_current(pcm_handle, swparams);
if ((err = snd_pcm_sw_params_set_start_threshold(pcm_handle, swparams,
buffer_size - period_size)) < 0)
qWarning("OutputALSA: Error setting threshold: %s", snd_strerror(err));
if ((err = snd_pcm_sw_params(pcm_handle, swparams)) < 0)
{
qWarning("OutputALSA: Error setting SW params: %s", snd_strerror(err));
return false;
}
//setup needed values
m_chunk_size = period_size;
m_can_pause = snd_pcm_hw_params_can_pause(hwparams) && use_pause;
qDebug("OutputALSA: can pause: %d", m_can_pause);
ChannelMap out_map = map;
#if (SND_LIB_VERSION >= 0x01001B)
//channel map configuration
snd_pcm_chmap_t *chmap = snd_pcm_get_chmap(pcm_handle);
if(chmap)
{
out_map.clear();
char tmp[256];
memset(tmp,0,256);
snd_pcm_chmap_print(chmap, 256, tmp);
qDebug("OutputALSA: received channel map: %s",tmp);
for(uint i = 0; i < chmap->channels; ++i)
{
if(m_alsa_channels.keys().contains(chmap->pos[i]))
out_map.append(m_alsa_channels.value(chmap->pos[i]));
else
out_map.append(Qmmp::CHAN_NULL);
}
free(chmap);
}
else
qWarning("OutputALSA: Unable to receive current channel map");
#endif
configure(exact_rate, out_map, format); //apply configuration
//create alsa prebuffer;
m_prebuf_size = 2 * snd_pcm_frames_to_bytes(pcm_handle, m_chunk_size); //buffer for two periods
m_prebuf = (uchar *)malloc(m_prebuf_size);
m_inited = true;
return true;
}
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 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 alsa_init(const char *param, int *speed, int *fragsize, int *fragnr, int *channels)
{
int err, dir;
unsigned int rate, periods;
snd_pcm_uframes_t period_size;
snd_pcm_hw_params_t *hwparams;
if (!param) {
param = "default";
}
snd_pcm_hw_params_alloca(&hwparams);
if ((err = snd_pcm_open(&handle, param, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
log_message(LOG_DEFAULT, "Playback open error for '%s': %s", param,
snd_strerror(err));
return 1;
}
if ((err = snd_pcm_hw_params_any(handle, hwparams)) < 0) {
log_message(LOG_DEFAULT, "Broken configuration for playback: no configurations available: %s", snd_strerror(err));
goto fail;
}
if ((err = snd_pcm_hw_params_set_access(handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
log_message(LOG_DEFAULT, "Access type not available for playback: %s", snd_strerror(err));
goto fail;
}
if ((err = snd_pcm_hw_params_set_format(handle, hwparams, SND_PCM_FORMAT_S16)) < 0) {
log_message(LOG_DEFAULT, "Sample format not available for playback: %s", snd_strerror(err));
goto fail;
}
if ((err = snd_pcm_hw_params_set_channels(handle, hwparams, *channels)) < 0) {
log_message(LOG_DEFAULT, "Channels count (%i) not available for playbacks: %s", *channels, snd_strerror(err));
goto fail;
}
rate = (unsigned int)*speed;
if ((err = snd_pcm_hw_params_set_rate_near(handle, hwparams, &rate, 0)) < 0) {
log_message(LOG_DEFAULT, "Rate %iHz not available for playback: %s", *speed, snd_strerror(err));
goto fail;
}
if (rate != (unsigned int)*speed) {
printf("Rate doesn't match (requested %iHz, got %iHz)", *speed, rate);
*speed = rate;
}
/* calculate requested buffer size */
alsa_bufsize = (*fragsize) * (*fragnr);
period_size = *fragsize;
dir = 0;
if ((err = snd_pcm_hw_params_set_period_size_near(handle, hwparams, &period_size, &dir)) < 0) {
log_message(LOG_DEFAULT, "Unable to set period size %li for playback: %s", period_size, snd_strerror(err));
goto fail;
}
*fragsize = period_size;
/* number of periods according to the buffer size we wanted, nearest val */
*fragnr = (alsa_bufsize + *fragsize / 2) / *fragsize;
periods = *fragnr;
dir = 0;
if ((err = snd_pcm_hw_params_set_periods_near(handle, hwparams, &periods, &dir)) < 0) {
log_message(LOG_DEFAULT, "Unable to set periods %i for playback: %s", periods, snd_strerror(err));
goto fail;
}
*fragnr = periods;
alsa_can_pause = snd_pcm_hw_params_can_pause(hwparams);
if ((err = snd_pcm_hw_params(handle, hwparams)) < 0) {
log_message(LOG_DEFAULT, "Unable to set hw params for playback: %s", snd_strerror(err));
goto fail;
}
alsa_bufsize = (*fragsize) * (*fragnr);
alsa_fragsize = *fragsize;
alsa_channels = *channels;
return 0;
fail:
snd_pcm_close(handle);
handle = NULL;
return 1;
}
snd_pcm_t *OpenDev( const char *pcm_dev,
unsigned int *channels,
unsigned int *frequency,
snd_pcm_uframes_t *buffsize,
snd_pcm_uframes_t *periodsize,
unsigned int *periodtime,
int *hard_pause){
snd_pcm_t *mhandle;
snd_pcm_hw_params_t *hwparams;
unsigned int periods=2;
unsigned int exactrate = *frequency;
// The compiler might warn us because the expansion starts with
// assert(&hwparams)
snd_pcm_hw_params_alloca(&hwparams);
if (snd_pcm_open(&mhandle,pcm_dev,SND_PCM_STREAM_CAPTURE,SND_PCM_ASYNC)<0){
fprintf(stderr, "Couldn't open PCM device %s\n", pcm_dev);
return NULL;
}
else
fprintf(stderr, "Opened PCM device %s\n", pcm_dev);
if (snd_pcm_hw_params_any(mhandle, hwparams)<0){
fprintf(stderr, "Couldn't configure PCM device.\n");
return NULL;
}
if (snd_pcm_hw_params_set_access(mhandle,
hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED)<0){
fprintf(stderr, "Couldn't set access.\n");
return NULL;
}
if (snd_pcm_hw_params_set_format(mhandle,
hwparams,
SND_PCM_FORMAT_S16_LE)<0){
fprintf(stderr, "Couldn't set format.\n");
return NULL;
}
if (snd_pcm_hw_params_set_rate_near(mhandle, hwparams, &exactrate, 0)<0){
fprintf(stderr, "Couldn't set frequency.\n");
return NULL;
}
if (*frequency != exactrate){
fprintf(stderr, "Playback frequency %dHz is not available...\n"
"Using %dHz instead.\n",*frequency,exactrate);
*frequency=exactrate;
}
if (snd_pcm_hw_params_set_channels_near(mhandle, hwparams, channels)<0){
fprintf(stderr, "Couldn't set channels number.\n");
return NULL;
}
if(*channels>2){
fprintf(stderr,"Channels number should be 1(mono) or 2(stereo).\n");
return NULL;
}
if (snd_pcm_hw_params_set_periods_near(mhandle,hwparams,&periods,0)<0){
fprintf(stderr, "Couldn't set periods.\n");
return NULL;
}
if (snd_pcm_hw_params_set_buffer_size_near(mhandle,hwparams,buffsize)<0){
fprintf(stderr, "Couldn't set buffer size.\n");
return NULL;
}
if (snd_pcm_hw_params(mhandle,hwparams)<0){
fprintf(stderr, "Couldn't set hardware parameters.\n");
return NULL;
}
if(hard_pause!=NULL)
if(!snd_pcm_hw_params_can_pause(hwparams)){
*hard_pause=1;
}
if(periodsize!=NULL)
snd_pcm_hw_params_get_period_size(hwparams,periodsize,0);
if(periodtime!=NULL)
snd_pcm_hw_params_get_period_time(hwparams,periodtime,0);
fprintf(stderr,"Recording on device %s is set to:\n%d channels at %dHz\n",
pcm_dev,*channels,*frequency);
snd_pcm_prepare(mhandle);
return mhandle;
}
