/*************************************************************************** * __________ __ ___. * 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(); } 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 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(); 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; }