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test/pcm.c: float format support

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Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-07-06 08:56:53 +02:00
parent 184301ae4c
commit b8c4fef8bf
1 changed files with 15 additions and 3 deletions
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18
test/pcm.c
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@ -43,6 +43,8 @@ static void generate_sine(const snd_pcm_channel_area_t *areas,
int phys_bps = snd_pcm_format_physical_width(format) / 8;
int big_endian = snd_pcm_format_big_endian(format) == 1;
int to_unsigned = snd_pcm_format_unsigned(format) == 1;
int is_float = (format == SND_PCM_FORMAT_FLOAT_LE ||
format == SND_PCM_FORMAT_FLOAT_BE);
/* verify and prepare the contents of areas */
for (chn = 0; chn < channels; chn++) {
@ -60,8 +62,16 @@ static void generate_sine(const snd_pcm_channel_area_t *areas,
}
/* fill the channel areas */
while (count-- > 0) {
union {
float f;
int i;
} fval;
int res, i;
res = sin(phase) * maxval;
if (is_float) {
fval.f = sin(phase) * maxval;
res = fval.i;
} else
res = sin(phase) * maxval;
if (to_unsigned)
res ^= 1U << (format_bits - 1);
for (chn = 0; chn < channels; chn++) {
@ -833,8 +843,10 @@ int main(int argc, char *argv[])
}
if (format == SND_PCM_FORMAT_LAST)
format = SND_PCM_FORMAT_S16;
if (!snd_pcm_format_linear(format)) {
printf("Invalid (non-linear) format %s\n",
if (!snd_pcm_format_linear(format) &&
!(format == SND_PCM_FORMAT_FLOAT_LE ||
format == SND_PCM_FORMAT_FLOAT_BE)) {
printf("Invalid (non-linear/float) format %s\n",
optarg);
return 1;
}