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furrtek
2016-01-31 09:34:24 +01:00
parent 29ec87a9ad
commit 44638e504b
166 changed files with 8700 additions and 3967 deletions
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firmware/baseband/proc_am_audio.cpp
+56 -28
View File
@@ -21,39 +21,67 @@
#include "proc_am_audio.hpp"
#include <cstdint>
#include "dsp_iir_config.hpp"
#include "audio_output.hpp"
void NarrowbandAMAudio::execute(buffer_c8_t buffer) {
auto decimator_out = decimator.execute(buffer);
#include <array>
const buffer_c16_t work_baseband_buffer {
(complex16_t*)decimator_out.p,
sizeof(*decimator_out.p) * decimator_out.count
};
void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
if( !configured ) {
return;
}
/* 96kHz complex<int16_t>[64]
* -> FIR filter, <?kHz (0.???fs) pass, gain 1.0
* -> 48kHz int16_t[32] */
auto channel = channel_filter.execute(decimator_out, work_baseband_buffer);
const auto decim_0_out = decim_0.execute(buffer, dst_buffer);
const auto decim_1_out = decim_1.execute(decim_0_out, dst_buffer);
const auto channel_out = channel_filter.execute(decim_1_out, dst_buffer);
// TODO: Feed channel_stats post-decimation data?
feed_channel_stats(channel);
feed_channel_spectrum(
channel,
decimator_out.sampling_rate * channel_filter_taps.pass_frequency_normalized,
decimator_out.sampling_rate * channel_filter_taps.stop_frequency_normalized
);
feed_channel_stats(channel_out);
channel_spectrum.feed(channel_out, channel_filter_pass_f, channel_filter_stop_f);
const buffer_s16_t work_audio_buffer {
(int16_t*)decimator_out.p,
sizeof(*decimator_out.p) * decimator_out.count
};
auto audio = demod.execute(channel_out, work_audio_buffer);
/* 48kHz complex<int16_t>[32]
* -> AM demodulation
* -> 48kHz int16_t[32] */
auto audio = demod.execute(channel, work_audio_buffer);
audio_hpf.execute_in_place(audio);
fill_audio_buffer(audio);
audio_output.write(audio);
}
void NarrowbandAMAudio::on_message(const Message* const message) {
switch(message->id) {
case Message::ID::UpdateSpectrum:
case Message::ID::SpectrumStreamingConfig:
channel_spectrum.on_message(message);
break;
case Message::ID::AMConfigure:
configure(*reinterpret_cast<const AMConfigureMessage*>(message));
break;
default:
break;
}
}
void NarrowbandAMAudio::configure(const AMConfigureMessage& message) {
constexpr size_t baseband_fs = 3072000;
constexpr size_t decim_0_input_fs = baseband_fs;
constexpr size_t decim_0_decimation_factor = 8;
constexpr size_t decim_0_output_fs = decim_0_input_fs / decim_0_decimation_factor;
constexpr size_t decim_1_input_fs = decim_0_output_fs;
constexpr size_t decim_1_decimation_factor = 8;
constexpr size_t decim_1_output_fs = decim_1_input_fs / decim_1_decimation_factor;
constexpr size_t channel_filter_input_fs = decim_1_output_fs;
constexpr size_t channel_filter_decimation_factor = 1;
constexpr size_t channel_filter_output_fs = channel_filter_input_fs / channel_filter_decimation_factor;
decim_0.configure(message.decim_0_filter.taps, 33554432);
decim_1.configure(message.decim_1_filter.taps, 131072);
channel_filter.configure(message.channel_filter.taps, channel_filter_decimation_factor);
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)));
audio_output.configure(audio_hpf_300hz_config);
configured = true;
}