asgardius/alsa-utils
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-utils synced 2024-12-22 13:16:31 +01:00
Code Issues Projects Releases Packages Wiki Activity

speaker-test: Add option to specify signal scale

Browse source 
Allow generated signals (sine and noise) to have a specified signal scale
instead of using hardcoded limits of 80%. This can be handy for debugging, ie
when analysing clipping issues with audio drivers.

Signed-off-by: Julian Scheel <julian@jusst.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Julian Scheel 2015-06-30 08:57:49 +02:00 committed by Takashi Iwai
parent 13c8269414
commit 791ae1c180
1 changed files with 18 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
speaker-test/speaker-test.c
View file

@ -100,6 +100,7 @@ static unsigned int period_time = 0; /* period time in us */
static unsigned int nperiods = 4; /* number of periods */
static double freq = 440.0; /* sinusoidal wave frequency in Hz */
static int test_type = TEST_PINK_NOISE; /* Test type. 1 = noise, 2 = sine wave */
static float generator_scale = 0.8; /* Scale to use for sine volume */
static pink_noise_t pink;
static snd_pcm_uframes_t buffer_size;
static snd_pcm_uframes_t period_size;
@ -306,7 +307,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
switch (format) {
case SND_PCM_FORMAT_S8:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0x03fffffff; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff;
ires = res;
*samp8++ = ires >> 24;
} else {
@ -315,7 +316,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
break;
case SND_PCM_FORMAT_S16_LE:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0x03fffffff; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff;
ires = res;
*samp16++ = LE_SHORT(ires >> 16);
} else {
@ -324,7 +325,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
break;
case SND_PCM_FORMAT_S16_BE:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0x03fffffff; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff;
ires = res;
*samp16++ = BE_SHORT(ires >> 16);
} else {
@ -333,7 +334,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
break;
case SND_PCM_FORMAT_FLOAT_LE:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0.75 ; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale;
fres = res;
*samp_f++ = fres;
} else {
@ -342,7 +343,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
break;
case SND_PCM_FORMAT_S32_LE:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0x03fffffff; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff;
ires = res;
*samp32++ = LE_INT(ires);
} else {
@ -351,7 +352,7 @@ static void generate_sine(uint8_t *frames, int channel, int count, double *_phas
break;
case SND_PCM_FORMAT_S32_BE:
if (chn==channel) {
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * 0x03fffffff; /* Don't use MAX volume */
res = (sin((phase * 2 * M_PI) / max_phase - M_PI)) * generator_scale * 0x7fffffff;
ires = res;
*samp32++ = BE_INT(ires);
} else {
@ -389,7 +390,7 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
switch (format) {
case SND_PCM_FORMAT_S8:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff;
ires = res;
*samp8++ = ires >> 24;
} else {
@ -398,7 +399,7 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
break;
case SND_PCM_FORMAT_S16_LE:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff;
ires = res;
*samp16++ = LE_SHORT(ires >> 16);
} else {
@ -407,7 +408,7 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
break;
case SND_PCM_FORMAT_S16_BE:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff;
ires = res;
*samp16++ = BE_SHORT(ires >> 16);
} else {
@ -416,7 +417,7 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
break;
case SND_PCM_FORMAT_S32_LE:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff;
ires = res;
*samp32++ = LE_INT(ires);
} else {
@ -425,7 +426,7 @@ static void generate_pink_noise( uint8_t *frames, int channel, int count) {
break;
case SND_PCM_FORMAT_S32_BE:
if (chn==channel) {
res = generate_pink_noise_sample(&pink) * 0x03fffffff; /* Don't use MAX volume */
res = generate_pink_noise_sample(&pink) * generator_scale * 0x07fffffff;
ires = res;
*samp32++ = BE_INT(ires);
} else {
@ -1017,6 +1018,7 @@ static void help(void)
"-W,--wavdir Specify the directory containing WAV files\n"
"-m,--chmap Specify the channel map to override\n"
"-X,--force-frequency force frequencies outside the 30-8000hz range\n"
"-S,--scale Scale of generated test tones in percent (default=80)\n"
"\n"));
printf(_("Recognized sample formats are:"));
for (fmt = supported_formats; *fmt >= 0; fmt++) {
@ -1060,6 +1062,7 @@ int main(int argc, char *argv[]) {
{"wavdir", 1, NULL, 'W'},
{"debug", 0, NULL, 'd'},
{"force-frequency", 0, NULL, 'X'},
{"scale", 1, NULL, 'S'},
#ifdef CONFIG_SUPPORT_CHMAP
{"chmap", 1, NULL, 'm'},
#endif
@ -1081,7 +1084,7 @@ int main(int argc, char *argv[]) {
while (1) {
int c;
if ((c = getopt_long(argc, argv, "hD:r:c:f:F:b:p:P:t:l:s:w:W:d:X"
if ((c = getopt_long(argc, argv, "hD:r:c:f:F:b:p:P:t:l:s:w:W:d:XS:"
#ifdef CONFIG_SUPPORT_CHMAP
"m:"
#endif
@ -1182,6 +1185,9 @@ int main(int argc, char *argv[]) {
chmap = optarg;
break;
#endif
case 'S':
generator_scale = atoi(optarg) / 100.0;
break;
default:
fprintf(stderr, _("Unknown option '%c'\n"), c);
exit(EXIT_FAILURE);