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Create AudioOutput singleton, from extracted BasebandProcessor code.

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This commit is contained in:
Jared Boone
2016-01-10 20:25:24 -08:00
parent 364217a2b5
commit 877a66ca78
11 changed files with 160 additions and 90 deletions
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22
firmware/baseband/proc_nfm_audio.cpp
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@@ -21,6 +21,9 @@
#include "proc_nfm_audio.hpp"
#include "dsp_iir_config.hpp"
#include "audio_output.hpp"
#include <cstdint>
#include <cstddef>
@@ -38,22 +41,7 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
auto audio = demod.execute(channel_out, work_audio_buffer);
// Yes, evaluate squelch here, but do audio filtering regardless to keep glitches
// out of the filters. Zero out audio *after* filtering, based on squelch status.
const auto audio_present_now = squelch.execute(audio);
audio_hpf.execute_in_place(audio);
audio_deemph.execute_in_place(audio);
static uint64_t audio_present_history = 0;
audio_present_history = (audio_present_history << 1) | (audio_present_now ? 1 : 0);
const bool audio_present = (audio_present_history != 0);
if( audio_present ) {
fill_audio_buffer(audio);
} else {
mute_audio(audio);
}
audio_output.write(audio);
}
void NarrowbandFMAudio::on_message(const Message* const message) {
@@ -99,7 +87,7 @@ void NarrowbandFMAudio::configure(const NBFMConfigureMessage& message) {
channel_filter_pass_f = message.channel_filter.pass_frequency_normalized * channel_filter_input_fs;
channel_filter_stop_f = message.channel_filter.stop_frequency_normalized * channel_filter_input_fs;
channel_spectrum.set_decimation_factor(std::floor((channel_filter_output_fs / 2) / ((channel_filter_pass_f + channel_filter_stop_f) / 2)));
squelch.set_threshold(6144);
audio_output.configure(audio_hpf_300hz_config, audio_deemph_300_6_config, 6144);
configured = true;
}