mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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6bcb7dc1b1
# The first commit's message is: Updated RDS transmitter: flags, PI and date/time Merging baseband audio tone generators Merging DTMF baseband with "tones" baseband Added stealth transmit mode App flash section bumped to 512k RX and TX LEDs are now used Play dead should work again, added login option Morse frame gen. for letters and fox hunt codes Merged EPAR with Xylos Made EPAR use encoders for frame gen. Moved OOK encoders data in encoders.hpp Simplified about screen, ui_about_demo.* files are still there BHT city DB, keywords removed BHT cities DB, keywords removed Update README.md RDS radiotext and time group generators # This is the 2nd commit message: Update README.md
126 lines
3.1 KiB
C++
126 lines
3.1 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "audio_output.hpp"
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#include "portapack_shared_memory.hpp"
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#include "audio_dma.hpp"
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#include "message.hpp"
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#include <cstdint>
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#include <cstddef>
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#include <array>
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void AudioOutput::configure(
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const bool do_proc
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) {
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do_processing = do_proc;
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}
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void AudioOutput::configure(
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const iir_biquad_config_t& hpf_config,
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const iir_biquad_config_t& deemph_config,
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const float squelch_threshold
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) {
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hpf.configure(hpf_config);
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deemph.configure(deemph_config);
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squelch.set_threshold(squelch_threshold);
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}
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void AudioOutput::write(
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const buffer_s16_t& audio
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) {
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std::array<float, 32> audio_f;
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for(size_t i=0; i<audio.count; i++) {
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audio_f[i] = audio.p[i] * ki;
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}
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write(buffer_f32_t {
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audio_f.data(),
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audio.count,
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audio.sampling_rate
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});
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}
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void AudioOutput::write(
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const buffer_f32_t& audio
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) {
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block_buffer.feed(
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audio,
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[this](const buffer_f32_t& buffer) {
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this->on_block(buffer);
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}
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);
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}
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void AudioOutput::on_block(
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const buffer_f32_t& audio
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) {
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bool audio_present;
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if (do_processing) {
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const auto audio_present_now = squelch.execute(audio);
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hpf.execute_in_place(audio);
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deemph.execute_in_place(audio);
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audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
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audio_present = (audio_present_history != 0);
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if( !audio_present ) {
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for(size_t i=0; i<audio.count; i++) {
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audio.p[i] = 0;
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}
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}
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} else
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audio_present = true;
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fill_audio_buffer(audio, audio_present);
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}
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void AudioOutput::fill_audio_buffer(const buffer_f32_t& audio, const bool send_to_fifo) {
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std::array<int16_t, 32> audio_int;
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auto audio_buffer = audio::dma::tx_empty_buffer();
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for(size_t i=0; i<audio_buffer.count; i++) {
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const int32_t sample_int = audio.p[i] * k;
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const int32_t sample_saturated = __SSAT(sample_int, 16);
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audio_buffer.p[i].left = audio_buffer.p[i].right = sample_saturated;
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audio_int[i] = sample_saturated;
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}
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if( stream && send_to_fifo ) {
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stream->write(audio_int.data(), audio_buffer.count * sizeof(audio_int[0]));
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}
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feed_audio_stats(audio);
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}
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void AudioOutput::feed_audio_stats(const buffer_f32_t& audio) {
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audio_stats.feed(
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audio,
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[](const AudioStatistics& statistics) {
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const AudioStatisticsMessage audio_stats_message { statistics };
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shared_memory.application_queue.push(audio_stats_message);
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}
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);
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}
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