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Red Hat Bugzilla – Attachment 306552 Details for
Bug 448168
unable to play 24bit PCM audio
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displays the capabilities of your sound card and its ALSA driver
alsacap.c (text/plain), 17.41 KB, created by
Dave Maley
on 2008-05-23 21:40:39 UTC
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Description:
displays the capabilities of your sound card and its ALSA driver
Filename:
MIME Type:
Creator:
Dave Maley
Created:
2008-05-23 21:40:39 UTC
Size:
17.41 KB
patch
obsolete
>/* > * ALSA parameter test program > * > * compile with: gcc -o alsacap alsacap.c -lasound >*/ > > >/*============================================================================ > Includes >============================================================================*/ > >#include <stdlib.h> >#include <stdio.h> >#include <alsa/asoundlib.h> >#include <errno.h> >#include <string.h> > > >/*============================================================================ > Constant and type definitions >============================================================================*/ > >#define RATE_KHZ_LIMIT 200 > >#define HWP_END 0 >#define HWP_RATE 1 >#define HWP_NCH 2 >#define HWP_FORMAT 3 >#define SIZE_HWP 7 > >typedef struct { > int recdevices, verbose, card, dev; > char *device; > int hwparams[SIZE_HWP]; >} >aiopts; > > >/*============================================================================ > Global variables >============================================================================*/ > >static snd_ctl_t *handle= NULL; >static snd_pcm_t *pcm= NULL; >static snd_ctl_card_info_t *info; >static snd_pcm_info_t *pcminfo; >static snd_pcm_hw_params_t *pars; >static snd_pcm_format_mask_t *fmask; > > >/*============================================================================ > Prototypes >============================================================================*/ > >void usagemsg(int code); >void errnumarg(char optchar); >void errarg(char optchar); >void errtoomany(); > >void scancards(snd_pcm_stream_t stream, int thecard, int thedev); >int sc_errcheck(int retval, const char *doingwhat, int cardnr, int devnr); > >void testconfig(snd_pcm_stream_t stream, const char *device, const int *hwpars); >void tc_errcheck(int retval, const char *doingwhat); > >const char *alsaerrstr(const int errcode); >const char *dirstr(int dir); > >int parse_alsaformats(const char *fmtstr); >const char *alsafmtstr(int fmtnum); > >void printfmtmask(const snd_pcm_format_mask_t *fmask); > > >/*============================================================================ > Main program >============================================================================*/ > >int main(int argc, char **argv) >{ > aiopts options= { 0, 1, -1, -1, NULL }; > snd_pcm_stream_t stream; > char *argpar; > int argind, hwpind; > > snd_ctl_card_info_alloca(&info); > snd_pcm_info_alloca(&pcminfo); > snd_pcm_hw_params_alloca(&pars); > snd_pcm_format_mask_alloca(&fmask); > > hwpind= 0; > for( argind= 1; argind< argc; ++argind ) > { > if( argv[argind][0]!='-' ) { > fprintf(stderr, "Unrecognised command-line argument `%s'.\n", argv[argind]); > usagemsg(1); > } > if( argv[argind][2] ) argpar= argv[argind]+2; > else { > if( argind+1 >= argc ) argpar= NULL; > else argpar= argv[argind+1]; > } > if( argv[argind][1]=='h' || !strcmp(argv[argind]+1, "-help") ) > usagemsg(0); > else if( argv[argind][1]=='R' ) { > options.recdevices= 1; > argpar= NULL; // set to NULL if unused to keep track of next arg index > } > else if( argv[argind][1]=='C' ) { > if( !argpar || !isdigit(*argpar) ) errnumarg('C'); > options.card= strtol(argpar, NULL, 0); > } > else if( argv[argind][1]=='D' ) { > if( !argpar || !isdigit(*argpar) ) errnumarg('D'); > options.dev= strtol(argpar, NULL, 0); > } > else if( argv[argind][1]=='d' ) { > if( !argpar ) errarg('d'); > options.device= argpar; > } > else if( argv[argind][1]=='r' ) { > if( !argpar || !isdigit(*argpar) ) errnumarg('r'); > if( hwpind+3 > SIZE_HWP ) errtoomany(); > options.hwparams[hwpind++]= HWP_RATE; > options.hwparams[hwpind]= strtol(argpar, NULL, 0); > if( options.hwparams[hwpind] <= RATE_KHZ_LIMIT ) > options.hwparams[hwpind] *= 1000; // sanity check: Hz or kHz ? > ++hwpind; > } > else if( argv[argind][1]=='c' ) { > if( !argpar || !isdigit(*argpar) ) errnumarg('c'); > if( hwpind+3 > SIZE_HWP ) errtoomany(); > options.hwparams[hwpind++]= HWP_NCH; > options.hwparams[hwpind++]= strtol(argpar, NULL, 0); > } > else if( argv[argind][1]=='f' ) { > if( !argpar ) errarg('f'); > if( hwpind+3 > SIZE_HWP ) errtoomany(); > options.hwparams[hwpind++]= HWP_FORMAT; > options.hwparams[hwpind++]= parse_alsaformat(argpar); > } > else { > fprintf(stderr, "Unrecognised command-line option `%s'.\n", argv[argind]); > usagemsg(1); > } > if( argpar && !argv[argind][2] ) > ++argind; // additional increment if separate parameter argument was used > } > options.hwparams[hwpind]= HWP_END; > if( options.dev >= 0 && options.card < 0 ) { > fprintf(stderr, "The card has to be specified with -C if a device number is given (-D).\n"); > exit(1); > } > if( options.device && (options.card>=0 || options.dev>=0) ) { > fprintf(stderr, "Specifying a device name (-d) and a card and possibly device number (-C, -D) is mutually exclusive.\n"); > exit(1); > } > stream= options.recdevices? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK; > > if( !options.device ) > scancards(stream, options.card, options.dev); > else > testconfig(stream, options.device, options.hwparams); > >} > > > >/*============================================================================ > Usage message and command-line argument error functions >============================================================================*/ > >void usagemsg(int code) >{ > fprintf(stderr, "Usage: alsacap [-R] [-C <card #> [-D <device #>]]\n" > " alsacap [-R] -d <device name> [-r <rate>|-c <# of channels>|-f <sample format>]...\n" > "ALSA capability lister.\n" > "First form: Scans one or all soundcards known to ALSA for devices, \n" > "subdevices and parameter ranges. -R causes a scan for recording\n" > "rather than playback devices. The other options specify the sound\n" > "card and possibly the device by number.\n" > "Second form: Displays ranges of configuration parameters for the given\n" > "ALSA device. Unlike with the first form, a non-hardware device may be\n" > "given. Up to three optional command-line arguments fix the rate,\n" > "number of channels and sample format in the order in which they are\n" > "given. The remaining parameter ranges are output. If unique, the\n" > "number of significant bits of the sample values is output. (Some\n" > "sound cards ignore some of the bits.)\n"); > exit(code); >} > >void errnumarg(char optchar) >{ > fprintf(stderr, "The -%c option requires a numerical argument! Aborting.\n", optchar); > exit(1); >} > >void errarg(char optchar) >{ > fprintf(stderr, "The -%c option requires an argument! Aborting.\n", optchar); > exit(1); >} > >void errtoomany() >{ > fprintf(stderr, "Too many -r/-c/-f options given! (Maximum is %d.) Aborting.\n", (SIZE_HWP-1)/2); > exit(1); >} > > >/*============================================================================ > Function for scanning all cards >============================================================================*/ > >#define HWCARDTEMPL "hw:%d" >#define HWDEVTEMPL "hw:%d,%d" >#define HWDEVLEN 32 > >void scancards(snd_pcm_stream_t stream, int thecard, int thedev) >{ > char hwdev[HWDEVLEN+1]; > unsigned min, max; > int card, err, dev, subd, nsubd; > > printf("*** Scanning for %s devices", stream==SND_PCM_STREAM_CAPTURE? "recording" : "playback"); > if( thecard >= 0 ) > printf(" on card %d", thecard); > if( thedev >= 0 ) > printf(", device %d", thedev); > printf(" ***\n"); > hwdev[HWDEVLEN]= 0; > if( thecard >= 0 ) > card= thecard; > else { > card= -1; > if( snd_card_next(&card) < 0 ) > return; > } > while( card >= 0 ) > { > snprintf(hwdev, HWDEVLEN, HWCARDTEMPL, card); > err= snd_ctl_open(&handle, hwdev, 0); > if( sc_errcheck(err, "opening control interface", card, -1) ) goto nextcard; > err= snd_ctl_card_info(handle, info); > if( sc_errcheck(err, "obtaining card info", card, -1) ) { > snd_ctl_close(handle); > goto nextcard; > } > printf("Card %d, ID `%s', name `%s'\n", card, snd_ctl_card_info_get_id(info), > snd_ctl_card_info_get_name(info)); > if( thedev >= 0 ) > dev= thedev; > else { > dev= -1; > if( snd_ctl_pcm_next_device(handle, &dev) < 0 ) { > snd_ctl_close(handle); > goto nextcard; > } > } > while( dev >= 0 ) > { > snd_pcm_info_set_device(pcminfo, dev); > snd_pcm_info_set_subdevice(pcminfo, 0); > snd_pcm_info_set_stream(pcminfo, stream); > err= snd_ctl_pcm_info(handle, pcminfo); > if( thedev<0 && err == -ENOENT ) goto nextdev; > if( sc_errcheck(err, "obtaining device info", card, dev) ) goto nextdev; > nsubd= snd_pcm_info_get_subdevices_count(pcminfo); > if( sc_errcheck(nsubd, "obtaining device info", card, dev) ) goto nextdev; > printf(" Device %d, ID `%s', name `%s', %d subdevices (%d available)\n", > dev, snd_pcm_info_get_id(pcminfo), snd_pcm_info_get_name(pcminfo), > nsubd, snd_pcm_info_get_subdevices_avail(pcminfo)); > snprintf(hwdev, HWDEVLEN, HWDEVTEMPL, card, dev); > err= snd_pcm_open(&pcm, hwdev, stream, SND_PCM_NONBLOCK); > if( sc_errcheck(err, "opening sound device", card, dev) ) goto nextdev; > err= snd_pcm_hw_params_any(pcm, pars); > if( sc_errcheck(err, "obtaining hardware parameters", card, dev) ) { > snd_pcm_close(pcm); > goto nextdev; > } > snd_pcm_hw_params_get_channels_min(pars, &min); > snd_pcm_hw_params_get_channels_max(pars, &max); > if( min == max ) > if( min == 1 ) printf(" 1 channel, "); > else printf(" %d channels, ", min); > else printf(" %u..%u channels, ", min, max); > snd_pcm_hw_params_get_rate_min(pars, &min, NULL); > snd_pcm_hw_params_get_rate_max(pars, &max, NULL); > printf("sampling rate %u..%u Hz\n Sample formats: ", min, max); > snd_pcm_hw_params_get_format_mask(pars, fmask); > printfmtmask(fmask); > snd_pcm_close(pcm); > printf("\n"); > pcm= NULL; > for( subd= 0; subd< nsubd; ++subd ) { > snd_pcm_info_set_subdevice(pcminfo, subd); > err= snd_ctl_pcm_info(handle, pcminfo); > if( sc_errcheck(err, "obtaining subdevice info", card, dev) ) goto nextdev; > printf(" Subdevice %d, name `%s'\n", subd, snd_pcm_info_get_subdevice_name(pcminfo)); > } >nextdev: > if( thedev >= 0 || snd_ctl_pcm_next_device(handle, &dev) < 0 ) > break; > } > snd_ctl_close(handle); >nextcard: > if( thecard >= 0 || snd_card_next(&card) < 0 ) > break; > } >} > > >int sc_errcheck(int retval, const char *doingwhat, int cardnr, int devnr) >{ > if( retval<0 ) { > if( devnr>= 0 ) > fprintf(stderr, "Error %s for card %d, device %d: %s. Skipping.\n", doingwhat, cardnr, devnr, alsaerrstr(retval)); > else > fprintf(stderr, "Error %s for card %d: %s. Skipping.\n", doingwhat, cardnr, alsaerrstr(retval)); > return 1; > } > return 0; >} > > > >/*============================================================================ > Function for investigating device configurations >============================================================================*/ > >void testconfig(snd_pcm_stream_t stream, const char *device, const int *hwpars) >{ > unsigned min, max, param; > int err, count, dir, result; > > printf("*** Exploring configuration space of device `%s' for %s ***\n", device, > stream==SND_PCM_STREAM_CAPTURE? "recording" : "playback"); > err= snd_pcm_open(&pcm, device, stream, SND_PCM_NONBLOCK); > tc_errcheck(err, "opening sound device"); > err= snd_pcm_hw_params_any(pcm, pars); > tc_errcheck(err, "initialising hardware parameters"); > for( count= 0; hwpars[count]!=HWP_END; count += 2 ) > > switch(hwpars[count]) > { > case HWP_RATE:param= hwpars[count+1]; > err= snd_pcm_hw_params_set_rate_near(pcm, pars, ¶m, &result); > if( err<0 ) > fprintf(stderr, "Could not set sampling rate to %d Hz: %s. " > "Continuing regardless.\n", hwpars[count+1], alsaerrstr(err)); > else > printf("Set sampling rate %d Hz --> got %u Hz, %s requested.\n", hwpars[count+1], param, dirstr(dir)); > break; > case HWP_NCH:err= snd_pcm_hw_params_set_channels(pcm, pars, hwpars[count+1]); > if( err<0 ) > fprintf(stderr, "Could not set # of channels to %d: %s. " > "Continuing regardless.\n", hwpars[count+1], alsaerrstr(err)); > else > printf("Set number of channels to %d.\n", hwpars[count+1]); > break; > case HWP_FORMAT:err= snd_pcm_hw_params_set_format(pcm, pars, hwpars[count+1]); > if( err<0 ) > fprintf(stderr, "Could not set sample format to %s: %s." > " Continuing regardless.\n", alsafmtstr(hwpars[count+1]), alsaerrstr(err)); > else > printf("Set sample format to %s.\n", alsafmtstr(hwpars[count+1])); > break; > default: > break; > } > if( count>0 ) > printf("Parameter ranges remaining after these settings:\n"); > snd_pcm_hw_params_get_channels_min(pars, &min); > snd_pcm_hw_params_get_channels_max(pars, &max); > if( min==max ) > if( min==1 ) > printf("1 channel\n"); > else > printf("%u channels\n", min); > else > printf("%u..%u channels\n", min, max); > snd_pcm_hw_params_get_rate_min(pars, &min, NULL); > snd_pcm_hw_params_get_rate_max(pars, &max, NULL); > if( min==max ) > printf("Sampling rate %u Hz\nSample formats: ", min); > else > printf("Sampling rate %u..%u Hz\nSample formats: ", min, max); > snd_pcm_hw_params_get_format_mask(pars, fmask); > printfmtmask(fmask); > printf("\n"); > result= snd_pcm_hw_params_get_sbits(pars); > if( result >= 0 ) // only available if bit width of all formats is the same > printf("Significant bits: %d\n", result); > snd_pcm_close(pcm); >} > > >void tc_errcheck(int retval, const char *doingwhat) >{ > if( retval<0 ) { > fprintf(stderr, "Error %s: %s. Aborting.\n", doingwhat, alsaerrstr(retval)); > if( pcm ) > snd_pcm_close(pcm); > exit(1); > } >} > > >/*============================================================================ > String-building functions >============================================================================*/ > >struct alsaerr { int err; char *msg; }; >struct alsaerr aelist[]= { > -EBADFD, "PCM device is in a bad state", > -EPIPE, "An underrun occurred", > -ESTRPIPE, "A suspend event occurred", > -ENOTTY, "Hotplug device has been removed", > -ENODEV, "Hotplug device has been removed", > -ENOENT, "Device does not exist", > 0, NULL >}; >const char *alsaerrstr(const int errcode) >{ > struct alsaerr *search; > > if( errcode >= 0 ) > return "No error"; > for( search= aelist; search->msg && search->err!=errcode; ++search); > if( search->msg ) > return search->msg; > else > return strerror(-errcode); >} > > >const char *dirstr(int dir) >{ > if( !dir ) > return "="; > else if( dir<0 ) > return "<"; > else > return ">"; >} > > >/*============================================================================ > Functions for parsing and string output of ALSA sample formats >============================================================================*/ > >struct fmtdef { char *fmtname; int format; }; >static struct fmtdef fmtlist[]= { > "S8", SND_PCM_FORMAT_S8, > "U8", SND_PCM_FORMAT_U8, > "S16_LE", SND_PCM_FORMAT_S16_LE, > "S16_BE", SND_PCM_FORMAT_S16_BE, > "U16_LE", SND_PCM_FORMAT_U16_LE, > "U16_BE", SND_PCM_FORMAT_U16_BE, > "S24_LE", SND_PCM_FORMAT_S24_LE, > "S24_BE", SND_PCM_FORMAT_S24_BE, > "U24_LE", SND_PCM_FORMAT_U24_LE, > "U24_BE", SND_PCM_FORMAT_U24_BE, > "S32_LE", SND_PCM_FORMAT_S32_LE, > "S32_BE", SND_PCM_FORMAT_S32_BE, > "U32_LE", SND_PCM_FORMAT_U32_LE, > "U32_BE", SND_PCM_FORMAT_U32_BE, > "FLOAT_LE", SND_PCM_FORMAT_FLOAT_LE, > "FLOAT_BE", SND_PCM_FORMAT_FLOAT_BE, > "FLOAT64_LE", SND_PCM_FORMAT_FLOAT64_LE, > "FLOAT64_BE", SND_PCM_FORMAT_FLOAT64_BE, > "IEC958_SUBFRAME_LE", SND_PCM_FORMAT_IEC958_SUBFRAME_LE, > "IEC958_SUBFRAME_BE", SND_PCM_FORMAT_IEC958_SUBFRAME_BE, > "MU_LAW", SND_PCM_FORMAT_MU_LAW, > "A_LAW", SND_PCM_FORMAT_A_LAW, > "IMA_ADPCM", SND_PCM_FORMAT_IMA_ADPCM, > "MPEG", SND_PCM_FORMAT_MPEG, > "GSM", SND_PCM_FORMAT_GSM, > "SPECIAL", SND_PCM_FORMAT_SPECIAL, > "S24_3LE", SND_PCM_FORMAT_S24_3LE, > "S24_3BE", SND_PCM_FORMAT_S24_3BE, > "U24_3LE", SND_PCM_FORMAT_U24_3LE, > "U24_3BE", SND_PCM_FORMAT_U24_3BE, > "S20_3LE", SND_PCM_FORMAT_S20_3LE, > "S20_3BE", SND_PCM_FORMAT_S20_3BE, > "U20_3LE", SND_PCM_FORMAT_U20_3LE, > "U20_3BE", SND_PCM_FORMAT_U20_3BE, > "S18_3LE", SND_PCM_FORMAT_S18_3LE, > "S18_3BE", SND_PCM_FORMAT_S18_3BE, > "U18_3LE", SND_PCM_FORMAT_U18_3LE, > "U18_3BE", SND_PCM_FORMAT_U18_3BE, > "S16", SND_PCM_FORMAT_S16, > "U16", SND_PCM_FORMAT_U16, > "S24", SND_PCM_FORMAT_S24, > "U24", SND_PCM_FORMAT_U24, > "S32", SND_PCM_FORMAT_S32, > "U32", SND_PCM_FORMAT_U32, > "FLOAT", SND_PCM_FORMAT_FLOAT, > "FLOAT64", SND_PCM_FORMAT_FLOAT64, > "IEC958_SUBFRAME", SND_PCM_FORMAT_IEC958_SUBFRAME, > NULL, 0 >}; > >int parse_alsaformat(const char *fmtstr) >{ > struct fmtdef *search; > > for( search= fmtlist; search->fmtname && strcmp(search->fmtname, fmtstr); ++search ); > if( !search->fmtname ) { > fprintf(stderr, "Unknown sample format `%s'. Aborting.\n", fmtstr); > exit(1); > } > return search->format; >} > >const char *alsafmtstr(int fmtnum) >{ > struct fmtdef *search; > > for( search= fmtlist; search->fmtname && search->format!=fmtnum; ++search ); > if( !search->fmtname ) > return "(unknown)"; > else > return search->fmtname; >} > > >/*============================================================================ > Printout functions >============================================================================*/ > >void printfmtmask(const snd_pcm_format_mask_t *fmask) >{ > int fmt, prevformat= 0; > > for( fmt= 0; fmt <= SND_PCM_FORMAT_LAST; ++fmt ) > if( snd_pcm_format_mask_test(fmask, (snd_pcm_format_t)fmt) ) { > if( prevformat ) > printf(", "); > printf("%s", snd_pcm_format_name((snd_pcm_format_t)fmt)); > prevformat= 1; > } > if( !prevformat ) > printf("(none)"); >} > >
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bug 448168
: 306552