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rockbox/apps/plugins/test_sampr.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Michael Sevakis
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
PLUGIN_HEADER
struct plugin_api *rb;
enum
{
TONE_SINE = 0,
TONE_TRIANGLE,
TONE_SAWTOOTH,
TONE_SQUARE,
NUM_WAVEFORMS
};
static int freq = HW_FREQ_DEFAULT;
static int waveform = TONE_SINE;
/* A441 at 44100Hz. Pitch will change with changing samplerate.
Test different waveforms to detect any aliasing in signal which
indicates duplicated/dropped samples */
static const int16_t A441[NUM_WAVEFORMS][100] =
{
[TONE_SINE] =
{
0, 2057, 4106, 6139, 8148,
10125, 12062, 13951, 15785, 17557,
19259, 20886, 22430, 23886, 25247,
26509, 27666, 28713, 29648, 30465,
31163, 31737, 32186, 32508, 32702,
32767, 32702, 32508, 32186, 31737,
31163, 30465, 29648, 28713, 27666,
26509, 25247, 23886, 22430, 20886,
19259, 17557, 15785, 13951, 12062,
10125, 8148, 6139, 4106, 2057,
0, -2057, -4106, -6139, -8148,
-10125, -12062, -13951, -15785, -17557,
-19259, -20886, -22430, -23886, -25247,
-26509, -27666, -28713, -29648, -30465,
-31163, -31737, -32186, -32508, -32702,
-32767, -32702, -32508, -32186, -31737,
-31163, -30465, -29648, -28713, -27666,
-26509, -25247, -23886, -22430, -20886,
-19259, -17557, -15785, -13951, -12062,
-10125, -8148, -6139, -4106, -2057,
},
[TONE_TRIANGLE] =
{
0, 1310, 2621, 3932, 5242,
6553, 7864, 9174, 10485, 11796,
13106, 14417, 15728, 17038, 18349,
19660, 20970, 22281, 23592, 24902,
26213, 27524, 28834, 30145, 31456,
32767, 31456, 30145, 28834, 27524,
26213, 24902, 23592, 22281, 20970,
19660, 18349, 17038, 15728, 14417,
13106, 11796, 10485, 9174, 7864,
6553, 5242, 3932, 2621, 1310,
0, -1310, -2621, -3932, -5242,
-6553, -7864, -9174, -10485, -11796,
-13106, -14417, -15728, -17038, -18349,
-19660, -20970, -22281, -23592, -24902,
-26213, -27524, -28834, -30145, -31456,
-32767, -31456, -30145, -28834, -27524,
-26213, -24902, -23592, -22281, -20970,
-19660, -18349, -17038, -15728, -14417,
-13106, -11796, -10485, -9174, -7864,
-6553, -5242, -3932, -2621, -1310,
},
[TONE_SAWTOOTH] =
{
-32767, -32111, -31456, -30800, -30145,
-29490, -28834, -28179, -27524, -26868,
-26213, -25558, -24902, -24247, -23592,
-22936, -22281, -21626, -20970, -20315,
-19660, -19004, -18349, -17694, -17038,
-16383, -15728, -15072, -14417, -13762,
-13106, -12451, -11796, -11140, -10485,
-9830, -9174, -8519, -7864, -7208,
-6553, -5898, -5242, -4587, -3932,
-3276, -2621, -1966, -1310, -655,
0, 655, 1310, 1966, 2621,
3276, 3932, 4587, 5242, 5898,
6553, 7208, 7864, 8519, 9174,
9830, 10485, 11140, 11796, 12451,
13106, 13762, 14417, 15072, 15728,
16383, 17038, 17694, 18349, 19004,
19660, 20315, 20970, 21626, 22281,
22936, 23592, 24247, 24902, 25558,
26213, 26868, 27524, 28179, 28834,
29490, 30145, 30800, 31456, 32111,
},
[TONE_SQUARE] =
{
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
32767, 32767, 32767, 32767, 32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
-32767, -32767, -32767, -32767, -32767,
}
};
void play_waveform(void)
{
static struct opt_items names[HW_NUM_FREQ] =
{
HW_HAVE_96_([HW_FREQ_96] = { "96kHz", NULL },)
HW_HAVE_88_([HW_FREQ_88] = { "88.2kHz", NULL },)
HW_HAVE_64_([HW_FREQ_64] = { "64kHz", NULL },)
HW_HAVE_48_([HW_FREQ_48] = { "48kHz", NULL },)
HW_HAVE_44_([HW_FREQ_44] = { "44.1kHz", NULL },)
HW_HAVE_32_([HW_FREQ_32] = { "32kHz", NULL },)
HW_HAVE_24_([HW_FREQ_24] = { "24kHz", NULL },)
HW_HAVE_22_([HW_FREQ_22] = { "22.05kHz", NULL },)
HW_HAVE_16_([HW_FREQ_16] = { "16kHz", NULL },)
HW_HAVE_12_([HW_FREQ_12] = { "12kHz", NULL },)
HW_HAVE_11_([HW_FREQ_11] = { "11.025kHz", NULL },)
HW_HAVE_8_( [HW_FREQ_8 ] = { "8kHz", NULL },)
};
/* 50 cycles of wavform */
static int32_t audio[5000];
void init_audio(int type)
{
int i;
/* Signal amplitudes to adjust for somewhat equal percieved
volume */
int amps[NUM_WAVEFORMS] =
{
[TONE_SINE] = 8191,
[TONE_TRIANGLE] = 5119,
[TONE_SAWTOOTH] = 2047,
[TONE_SQUARE] = 1535
};
/* Initialize one cycle of the waveform */
for (i = 0; i < 100; i++)
{
uint16_t val = amps[type]*A441[type][i]/32767;
audio[i] = (val << 16) | val;
}
/* Duplicate it 49 more times */
for (i = 1; i < 50; i++)
{
rb->memcpy(audio + i*100, audio, 100*sizeof(int32_t));
}
}
/* ISR handler to get next block of data */
void get_more(unsigned char **start, size_t *size)
{
*start = (unsigned char *)audio;
*size = sizeof (audio);
}
/* Called to switch samplerate on the fly */
void set_frequency(int index)
{
rb->pcm_set_frequency(rb->hw_freq_sampr[index]);
rb->pcm_apply_settings(false);
}
rb->audio_stop();
rb->sound_set(SOUND_VOLUME, rb->sound_default(SOUND_VOLUME));
/* Select playback */
rb->rec_set_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
rb->cpu_boost(true);
rb->pcm_set_frequency(rb->hw_freq_sampr[freq]);
#ifdef HAVE_RECORDING
/* Recordable targets can play back from other sources */
rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
#endif
/* This reset parameter will likely be deleted soon and resetting be
automatic - ignore if the implementation doesn't need it */
rb->pcm_apply_settings(true);
init_audio(waveform);
rb->pcm_play_data(get_more, NULL, 0);
rb->set_option("Sample Rate", &freq, INT, names,
HW_NUM_FREQ, set_frequency);
rb->pcm_play_stop();
while (rb->pcm_is_playing())
rb->yield();
rb->cpu_boost(false);
/* restore default - user of apis is responsible for restoring
default state - normally playback at 44100Hz */
rb->pcm_set_frequency(HW_FREQ_DEFAULT);
}
void set_waveform(void)
{
static struct opt_items names[NUM_WAVEFORMS] =
{
[TONE_SINE] = { "Sine", NULL },
[TONE_TRIANGLE] = { "Triangle", NULL },
[TONE_SAWTOOTH] = { "Sawtooth", NULL },
[TONE_SQUARE] = { "Square", NULL },
};
rb->set_option("Waveform", &waveform, INT, names,
NUM_WAVEFORMS, NULL);
}
/* Tests hardware sample rate switching */
/* TODO: needs a volume control */
enum plugin_status plugin_start(struct plugin_api *api, void *parameter)
{
static const struct menu_item items[] =
{
{ "Set Waveform", NULL },
{ "Play Waveform", NULL },
{ "Quit", NULL },
};
bool exit = false;
int m;
bool talk_menu;
rb = api;
/* Have to shut up voice menus or it will mess up our waveform playback */
talk_menu = rb->global_settings->talk_menu;
rb->global_settings->talk_menu = false;
m = rb->menu_init(items, ARRAYLEN(items),
NULL, NULL, NULL, NULL);
while (!exit)
{
int result = rb->menu_show(m);
switch (result)
{
case 0:
set_waveform();
break;
case 1:
play_waveform();
break;
case 2:
exit = true;
break;
}
}
rb->menu_exit(m);
rb->global_settings->talk_menu = talk_menu;
return PLUGIN_OK;
(void)parameter;
}
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