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tinypcminfo.c
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/
tinypcminfo.c
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/* tinypcminfo.c
**
** Copyright 2012, The Android Open Source Project
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** * Neither the name of The Android Open Source Project nor the names of
** its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND
** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE
** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
** DAMAGE.
*/
#include <tinyalsa/asoundlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
#endif
/* The format_lookup is in order of SNDRV_PCM_FORMAT_##index and
* matches the grouping in sound/asound.h. Note this is not
* continuous and has an empty gap from (25 - 30).
*/
static const char *format_lookup[] = {
/*[0] =*/ "S8",
"U8",
"S16_LE",
"S16_BE",
"U16_LE",
"U16_BE",
"S24_LE",
"S24_BE",
"U24_LE",
"U24_BE",
"S32_LE",
"S32_BE",
"U32_LE",
"U32_BE",
"FLOAT_LE",
"FLOAT_BE",
"FLOAT64_LE",
"FLOAT64_BE",
"IEC958_SUBFRAME_LE",
"IEC958_SUBFRAME_BE",
"MU_LAW",
"A_LAW",
"IMA_ADPCM",
"MPEG",
/*[24] =*/ "GSM",
[31] = "SPECIAL",
"S24_3LE",
"S24_3BE",
"U24_3LE",
"U24_3BE",
"S20_3LE",
"S20_3BE",
"U20_3LE",
"U20_3BE",
"S18_3LE",
"S18_3BE",
"U18_3LE",
/*[43] =*/ "U18_3BE",
#if 0
/* recent additions, may not be present on local asound.h */
"G723_24",
"G723_24_1B",
"G723_40",
"G723_40_1B",
"DSD_U8",
"DSD_U16_LE",
#endif
};
/* Returns a human readable name for the format associated with bit_index,
* NULL if bit_index is not known.
*/
inline const char *pcm_get_format_name(unsigned bit_index)
{
return bit_index < ARRAY_SIZE(format_lookup) ? format_lookup[bit_index] : NULL;
}
int main(int argc, char **argv)
{
unsigned int device = 0;
unsigned int card = 0;
int i;
if (argc < 3) {
fprintf(stderr, "Usage: %s -D card -d device\n", argv[0]);
return 1;
}
/* parse command line arguments */
argv += 1;
while (*argv) {
if (strcmp(*argv, "-D") == 0) {
argv++;
if (*argv)
card = atoi(*argv);
}
if (strcmp(*argv, "-d") == 0) {
argv++;
if (*argv)
device = atoi(*argv);
}
if (*argv)
argv++;
}
printf("Info for card %u, device %u:\n", card, device);
for (i = 0; i < 2; i++) {
struct pcm_params *params;
struct pcm_mask *m;
unsigned int min;
unsigned int max;
printf("\nPCM %s:\n", i == 0 ? "out" : "in");
params = pcm_params_get(card, device, i == 0 ? PCM_OUT : PCM_IN);
if (params == NULL) {
printf("Device does not exist.\n");
continue;
}
m = pcm_params_get_mask(params, PCM_PARAM_ACCESS);
if (m) { /* bitmask, refer to SNDRV_PCM_ACCESS_*, generally interleaved */
printf(" Access:\t%#08x\n", m->bits[0]);
}
m = pcm_params_get_mask(params, PCM_PARAM_FORMAT);
if (m) { /* bitmask, refer to: SNDRV_PCM_FORMAT_* */
unsigned j, k, count = 0;
const unsigned bitcount = sizeof(m->bits[0]) * 8;
/* we only check first two format masks (out of 8) - others are zero. */
printf(" Format[0]:\t%#08x\n", m->bits[0]);
printf(" Format[1]:\t%#08x\n", m->bits[1]);
/* print friendly format names, if they exist */
for (k = 0; k < 2; ++k) {
for (j = 0; j < bitcount; ++j) {
const char *name;
if (m->bits[k] & (1 << j)) {
name = pcm_get_format_name(j + k*bitcount);
if (name) {
if (count++ == 0) {
printf(" Format Name:\t");
} else {
printf (", ");
}
printf("%s", name);
}
}
}
}
if (count) {
printf("\n");
}
}
m = pcm_params_get_mask(params, PCM_PARAM_SUBFORMAT);
if (m) { /* bitmask, should be 1: SNDRV_PCM_SUBFORMAT_STD */
printf(" Subformat:\t%#08x\n", m->bits[0]);
}
min = pcm_params_get_min(params, PCM_PARAM_RATE);
max = pcm_params_get_max(params, PCM_PARAM_RATE);
printf(" Rate:\tmin=%uHz\tmax=%uHz\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_CHANNELS);
max = pcm_params_get_max(params, PCM_PARAM_CHANNELS);
printf(" Channels:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_SAMPLE_BITS);
max = pcm_params_get_max(params, PCM_PARAM_SAMPLE_BITS);
printf(" Sample bits:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_PERIOD_SIZE);
max = pcm_params_get_max(params, PCM_PARAM_PERIOD_SIZE);
printf(" Period size:\tmin=%u\t\tmax=%u\n", min, max);
min = pcm_params_get_min(params, PCM_PARAM_PERIODS);
max = pcm_params_get_max(params, PCM_PARAM_PERIODS);
printf("Period count:\tmin=%u\t\tmax=%u\n", min, max);
pcm_params_free(params);
}
return 0;
}