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rockbox/apps/plugins/test_sampr.c
Daniel Stenberg 2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or 
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00

304 lines
9.3 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 Michael Sevakis
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "oldmenuapi.h"
PLUGIN_HEADER
const 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", -1 },)
HW_HAVE_88_([HW_FREQ_88] = { "88.2kHz", -1 },)
HW_HAVE_64_([HW_FREQ_64] = { "64kHz", -1 },)
HW_HAVE_48_([HW_FREQ_48] = { "48kHz", -1 },)
HW_HAVE_44_([HW_FREQ_44] = { "44.1kHz", -1 },)
HW_HAVE_32_([HW_FREQ_32] = { "32kHz", -1 },)
HW_HAVE_24_([HW_FREQ_24] = { "24kHz", -1 },)
HW_HAVE_22_([HW_FREQ_22] = { "22.05kHz", -1 },)
HW_HAVE_16_([HW_FREQ_16] = { "16kHz", -1 },)
HW_HAVE_12_([HW_FREQ_12] = { "12kHz", -1 },)
HW_HAVE_11_([HW_FREQ_11] = { "11.025kHz", -1 },)
HW_HAVE_8_( [HW_FREQ_8 ] = { "8kHz", -1 },)
};
/* 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();
}
rb->audio_stop();
rb->sound_set(SOUND_VOLUME, rb->sound_default(SOUND_VOLUME));
#if INPUT_SRC_CAPS != 0
/* Select playback */
rb->audio_set_input_source(AUDIO_SRC_PLAYBACK, SRCF_PLAYBACK);
#endif
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(true);
#endif
rb->pcm_set_frequency(rb->hw_freq_sampr[freq]);
#if INPUT_SRC_CAPS != 0
/* Recordable targets can play back from other sources */
rb->audio_set_output_source(AUDIO_SRC_PLAYBACK);
#endif
rb->pcm_apply_settings();
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();
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
rb->cpu_boost(false);
#endif
/* 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", -1 },
[TONE_TRIANGLE] = { "Triangle", -1 },
[TONE_SAWTOOTH] = { "Sawtooth", -1 },
[TONE_SQUARE] = { "Square", -1 },
};
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(const struct plugin_api *api, const 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 = menu_init(rb, items, ARRAYLEN(items),
NULL, NULL, NULL, NULL);
while (!exit)
{
int result = menu_show(m);
switch (result)
{
case 0:
set_waveform();
break;
case 1:
play_waveform();
break;
case 2:
exit = true;
break;
}
}
menu_exit(m);
rb->global_settings->talk_menu = talk_menu;
return PLUGIN_OK;
(void)parameter;
}
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