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alsabat: add channels parameter for adjust_waveform()

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The function adjust_waveform() is a component of generate_sine_wave(),
and depended on bat->channels parameter. Add parameter "channels" to
remove the dependency, and then adjust_waveform() can be applied on
other use cases, e.g. a single channel sine wave generator.

Signed-off-by: Lu, Han <han.lu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Lu, Han 2016-06-09 03:42:47 +08:00 committed by Takashi Iwai
parent 09cb66f40c
commit e0c1c86a90
1 changed files with 4 additions and 3 deletions
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7
bat/signal.c
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@ -109,7 +109,8 @@ static int reorder(struct bat *bat, float *val, int frames)
return 0; return 0;
} }
static int adjust_waveform(struct bat *bat, float *val, int frames) static int adjust_waveform(struct bat *bat, float *val, int frames,
int channels)
{ {
int i, nsamples, max; int i, nsamples, max;
float factor, offset = 0.0; float factor, offset = 0.0;
@ -134,7 +135,7 @@ static int adjust_waveform(struct bat *bat, float *val, int frames)
} }
factor = max * RANGE_FACTOR; factor = max * RANGE_FACTOR;
nsamples = bat->channels * frames; nsamples = channels * frames;
for (i = 0; i < nsamples; i++) for (i = 0; i < nsamples; i++)
val[i] = val[i] * factor + offset; val[i] = val[i] * factor + offset;
@ -171,7 +172,7 @@ int generate_sine_wave(struct bat *bat, int frames, void *buf)
goto exit; goto exit;
/* adjust amplitude and offset of waveform */ /* adjust amplitude and offset of waveform */
err = adjust_waveform(bat, sinus_f, frames); err = adjust_waveform(bat, sinus_f, frames, bat->channels);
if (err != 0) if (err != 0)
goto exit; goto exit;