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Add AM processor decim_2.

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This commit is contained in:
Jared Boone 2016-01-30 17:28:11 -08:00
parent 279e5c775d
commit 1915ff980f
5 changed files with 13 additions and 3 deletions
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1
firmware/application/analog_audio_app.cpp
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@ -102,6 +102,7 @@ void AnalogAudioModel::configure_am() {
const AMConfigureMessage message {
taps_6k0_decim_0,
taps_6k0_decim_1,
taps_6k0_decim_2,
taps_6k0_channel,
audio_12k_hpf_300hz_config
};

9
firmware/baseband/proc_am_audio.cpp
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@ -32,7 +32,8 @@ void NarrowbandAMAudio::execute(const buffer_c8_t& 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);
const auto decim_2_out = decim_2.execute(decim_1_out, dst_buffer);
const auto channel_out = channel_filter.execute(decim_2_out, dst_buffer);
// TODO: Feed channel_stats post-decimation data?
feed_channel_stats(channel_out);
@ -65,11 +66,15 @@ void NarrowbandAMAudio::configure(const AMConfigureMessage& message) {
constexpr size_t decim_1_input_fs = decim_0_output_fs;
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 decim_2_input_fs = decim_1_output_fs;
constexpr size_t decim_2_output_fs = decim_2_input_fs / decim_2_decimation_factor;
constexpr size_t channel_filter_input_fs = decim_2_output_fs;
const 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);
decim_2.configure(message.decim_2_filter.taps, decim_2_decimation_factor);
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;

1
firmware/baseband/proc_am_audio.hpp
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@ -56,6 +56,7 @@ private:
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
dsp::decimate::FIRC16xR16x32Decim8 decim_1;
dsp::decimate::FIRAndDecimateComplex decim_2;
dsp::decimate::FIRAndDecimateComplex channel_filter;
uint32_t channel_filter_pass_f = 0;
uint32_t channel_filter_stop_f = 0;

2
firmware/common/dsp_fir_taps.hpp
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@ -178,7 +178,7 @@ constexpr fir_taps_real<32> taps_6k0_decim_1 {
};
// Channel filter: fs=48000, pass=3000, stop=6700, decim=1, fout=48000
constexpr fir_taps_real<32> taps_6k0_channel {
constexpr fir_taps_real<32> taps_6k0_decim_2 {
.pass_frequency_normalized = 3000.0f / 48000.0f,
.stop_frequency_normalized = 6700.0f / 48000.0f,
.taps = { {

3
firmware/common/message.hpp
View File

@ -376,11 +376,13 @@ public:
constexpr AMConfigureMessage(
const fir_taps_real<24> decim_0_filter,
const fir_taps_real<32> decim_1_filter,
const fir_taps_real<32> decim_2_filter,
const fir_taps_real<32> channel_filter,
const iir_biquad_config_t audio_hpf_config
) : Message { ID::AMConfigure },
decim_0_filter(decim_0_filter),
decim_1_filter(decim_1_filter),
decim_2_filter(decim_2_filter),
channel_filter(channel_filter),
audio_hpf_config { audio_hpf_config }
{
@ -388,6 +390,7 @@ public:
const fir_taps_real<24> decim_0_filter;
const fir_taps_real<32> decim_1_filter;
const fir_taps_real<32> decim_2_filter;
const fir_taps_real<32> channel_filter;
const iir_biquad_config_t audio_hpf_config;
};