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audiotestsrc: implement sine wave

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Fix audiomixer some more
This commit is contained in:
Wim Taymans 2017-04-03 19:23:53 +02:00
parent 5c32690cc8
commit 32368d741d
7 changed files with 173 additions and 59 deletions
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56
spa/plugins/audiotestsrc/render.c Normal file
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/* Spa
* Copyright (C) 2017 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <math.h>
#define M_PI_M2 ( M_PI + M_PI )
typedef SpaResult (*RenderFunc) (SpaAudioTestSrc *this, void *samples, size_t n_samples);
#define DEFINE_SINE(type,scale) \
static void \
audio_test_src_create_sine_##type (SpaAudioTestSrc *this, type * samples, size_t n_samples) \
{ \
int i, c, channels; \
double step, amp; \
\
channels = this->current_format.info.raw.channels; \
step = M_PI_M2 * this->props.freq / this->current_format.info.raw.rate; \
amp = this->props.volume * scale; \
\
for (i = 0; i < n_samples; i++) { \
this->accumulator += step; \
if (this->accumulator >= M_PI_M2) \
this->accumulator -= M_PI_M2; \
for (c = 0; c < channels; ++c) \
*samples++ = (type) (sin (this->accumulator) * amp); \
} \
}
DEFINE_SINE (int16_t, 32767.0);
DEFINE_SINE (int32_t, 2147483647.0);
DEFINE_SINE (float, 1.0);
DEFINE_SINE (double, 1.0);
static const RenderFunc sine_funcs[] = {
(RenderFunc) audio_test_src_create_sine_int16_t,
(RenderFunc) audio_test_src_create_sine_int32_t,
(RenderFunc) audio_test_src_create_sine_float,
(RenderFunc) audio_test_src_create_sine_double
};