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 --- speaker-test/speaker-test.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/speaker-test/speaker-test.c b/speaker-test/speaker-test.c index ccf2671..25970af 100644 --- a/speaker-test/speaker-test.c +++ b/speaker-test/speaker-test.c @@ -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);