mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 11:44:31 +00:00
115 lines
2.9 KiB
C++
115 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* 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 "audio_output.hpp"
|
|
|
|
#include "portapack_shared_memory.hpp"
|
|
|
|
#include "audio_dma.hpp"
|
|
|
|
#include "message.hpp"
|
|
|
|
#include <cstdint>
|
|
#include <cstddef>
|
|
#include <array>
|
|
|
|
void AudioOutput::configure(
|
|
const iir_biquad_config_t& hpf_config,
|
|
const iir_biquad_config_t& deemph_config,
|
|
const float squelch_threshold
|
|
) {
|
|
hpf.configure(hpf_config);
|
|
deemph.configure(deemph_config);
|
|
squelch.set_threshold(squelch_threshold);
|
|
}
|
|
|
|
void AudioOutput::write(
|
|
const buffer_s16_t& audio
|
|
) {
|
|
std::array<float, 32> audio_f;
|
|
for(size_t i=0; i<audio.count; i++) {
|
|
audio_f[i] = audio.p[i] * ki;
|
|
}
|
|
write(buffer_f32_t {
|
|
audio_f.data(),
|
|
audio.count,
|
|
audio.sampling_rate
|
|
});
|
|
}
|
|
|
|
void AudioOutput::write(
|
|
const buffer_f32_t& audio
|
|
) {
|
|
block_buffer.feed(
|
|
audio,
|
|
[this](const buffer_f32_t& buffer) {
|
|
this->on_block(buffer);
|
|
}
|
|
);
|
|
}
|
|
|
|
void AudioOutput::on_block(
|
|
const buffer_f32_t& audio
|
|
) {
|
|
const auto audio_present_now = squelch.execute(audio);
|
|
|
|
hpf.execute_in_place(audio);
|
|
deemph.execute_in_place(audio);
|
|
|
|
audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
|
|
const bool audio_present = (audio_present_history != 0);
|
|
|
|
if( !audio_present ) {
|
|
for(size_t i=0; i<audio.count; i++) {
|
|
audio.p[i] = 0;
|
|
}
|
|
}
|
|
|
|
fill_audio_buffer(audio, audio_present);
|
|
}
|
|
|
|
void AudioOutput::fill_audio_buffer(const buffer_f32_t& audio, const bool send_to_fifo) {
|
|
std::array<int16_t, 32> audio_int;
|
|
|
|
auto audio_buffer = audio::dma::tx_empty_buffer();
|
|
for(size_t i=0; i<audio_buffer.count; i++) {
|
|
const int32_t sample_int = audio.p[i] * k;
|
|
const int32_t sample_saturated = __SSAT(sample_int, 16);
|
|
audio_buffer.p[i].left = audio_buffer.p[i].right = sample_saturated;
|
|
audio_int[i] = sample_saturated;
|
|
}
|
|
if( stream && send_to_fifo ) {
|
|
stream->write(audio_int.data(), audio_buffer.count * sizeof(audio_int[0]));
|
|
}
|
|
|
|
feed_audio_stats(audio);
|
|
}
|
|
|
|
void AudioOutput::feed_audio_stats(const buffer_f32_t& audio) {
|
|
audio_stats.feed(
|
|
audio,
|
|
[](const AudioStatistics& statistics) {
|
|
const AudioStatisticsMessage audio_stats_message { statistics };
|
|
shared_memory.application_queue.push(audio_stats_message);
|
|
}
|
|
);
|
|
}
|