mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
* Copyright (C) 2016 Furrtek
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* 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, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "proc_playaudio.hpp"
|
|
#include "portapack_shared_memory.hpp"
|
|
#include "sine_table.hpp"
|
|
#include "audio_output.hpp"
|
|
|
|
#include <cstdint>
|
|
|
|
void PlayAudioProcessor::on_message(const Message* const msg) {
|
|
if (msg->id == Message::ID::FIFOData) {
|
|
const auto message = static_cast<const FIFODataMessage*>(msg);
|
|
memcpy(&audio_fifo[fifo_put], message->data, 1024);
|
|
fifo_put = (fifo_put + 1024) & 0x0FFF;
|
|
asked = false;
|
|
}
|
|
}
|
|
|
|
void PlayAudioProcessor::execute(const buffer_c8_t& buffer){
|
|
|
|
// This is called at 1536000/2048 = 750Hz
|
|
|
|
ai = 0;
|
|
for (size_t i = 0; i<buffer.count; i++) {
|
|
// Audio preview sample generation: 1536000/48000 = 32
|
|
if (as >= 31) {
|
|
as = 0;
|
|
sample = audio_fifo[fifo_get];
|
|
preview_audio_buffer.p[ai++] = sample << 8;
|
|
fifo_get = (fifo_get + 1) & 0x0FFF;
|
|
if ((((fifo_put - fifo_get) & 0x0FFF) < 3072) && (asked == false)) {
|
|
// Ask application to fill up fifo
|
|
sigmessage.signaltype = 1;
|
|
shared_memory.application_queue.push(sigmessage);
|
|
asked = true;
|
|
}
|
|
} else {
|
|
as++;
|
|
}
|
|
|
|
sample = ((int8_t)audio_fifo[fifo_get] * 4);
|
|
|
|
//FM
|
|
frq = sample * 2000;
|
|
|
|
phase = (phase + frq);
|
|
sphase = phase + (256<<16);
|
|
|
|
re = (sine_table_f32[(sphase & 0x03FF0000)>>18]*127);
|
|
im = (sine_table_f32[(phase & 0x03FF0000)>>18]*127);
|
|
|
|
buffer.p[i] = {(int8_t)re,(int8_t)im};
|
|
}
|
|
|
|
//AudioOutput::fill_audio_buffer(preview_audio_buffer, true);
|
|
}
|