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Solve_quality_problem_low_bit_rate_100k_150k_REC_Capture_App (#1367)

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* Solve_low_bit_rate_150k_Capture_App

* Applying  review comments.

* format issues

* Adding back requested previous low bit rates
This commit is contained in:
Brumi-2021 2023-08-12 16:20:15 +02:00 committed by GitHub
parent cb0a4854f5
commit 853ca2ef53
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7 changed files with 17 additions and 9 deletions
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2
firmware/application/apps/capture_app.cpp
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@ -86,7 +86,7 @@ CaptureAppView::CaptureAppView(NavigationView& nav)
};
receiver_model.enable();
option_bandwidth.set_selected_index(7); // Preselected default option 500kHz.
option_bandwidth.set_by_value(500000); // better by_value than by option_bandwidth.set_selected_index(4), Preselected default option 500kHz.
record_view.on_error = [&nav](std::string message) {
nav.display_modal("Error", message);

2
firmware/application/freqman_db.cpp
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@ -76,10 +76,10 @@ options_t freqman_bandwidths[4] = {
// SPEC -- TODO: these should be indexes.
{"12k5", 12500},
{"16k", 16000},
{"20k", 20000},
{"25k", 25000},
{"50k", 50000},
{"100k", 100000},
{"150k", 150000},
{"250k", 250000},
{"500k", 500000}, /* Previous Limit bandwith Option with perfect micro SD write .C16 format operaton.*/
{"600k", 600000}, /* We doubled x2 previous REC BW limit , now extended BW from 600k to 1M with fast enough SD card in C16 or C8 format .*/

2
firmware/application/ui/ui_spectrum.cpp
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@ -383,7 +383,7 @@ void WaterfallView::on_audio_spectrum() {
// TODO: Comments below refer to a fixed oversample rate (8x), cleanup.
uint32_t filter_bandwidth_for_sampling_rate(int32_t sampling_rate) {
switch (sampling_rate) { // Use the var fs (sampling_rate) to set up BPF aprox < fs_max / 2 by Nyquist theorem.
case 0 ... 2'000'000: // BW Captured range (0 <= 250kHz max) fs = 8 x 250 kHz.
case 0 ... 3'000'000: // BW Captured range (0 <= 250kHz max) fs = 8 x 250 kHz., 16 x 150 khz, 32 x 75 khz, , 64 x 40 khz
return 1'750'000; // Minimum BPF MAX2837 for all those lower BW options.
case 4'000'000 ... 6'000'000: // BW capture range (500k...750kHz max) fs_max = 8 x 750kHz = 6Mhz

2
firmware/application/ui_record_view.cpp
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@ -113,7 +113,7 @@ uint32_t RecordView::set_sampling_rate(uint32_t new_sampling_rate) {
* They are ok as recorded spectrum indication, but they should not be used by Replay app. (the voice speed will be accelerated)
* We keep original black background in all the correct IQ .C16 files BW's Options. */
if (actual_sampling_rate > 8'000'000) { // Till fw 1.7.4 BW limit yellow REC button was >500khz, now BW >1Mhz (fs=8*BW), (>1Mhz ..2M75)
if ((actual_sampling_rate > 8'000'000) || (actual_sampling_rate <= 1'280'000)) { // yellow REC button means not ok for REC, BW >1Mhz , BW < 150khz
button_record.set_background(ui::Color::yellow());
} else {
button_record.set_background(ui::Color::black());

4
firmware/baseband/proc_capture.cpp
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@ -42,8 +42,8 @@ void CaptureProcessor::execute(const buffer_c8_t& buffer) {
const auto decim_0_out = decim_0_execute(buffer, dst_buffer); // selectable 3 possible decim_0, (/4. /8 200k soft transition filter , /8 180k sharp )
const auto decim_1_out = baseband_fs < 4800'000
? decim_1.execute(decim_0_out, dst_buffer) // < 500khz double decim. stage
: decim_0_out; // > 500khz single decim. stage
? decim_1.execute(decim_0_out, dst_buffer) // < 600khz double decim. stage , means 500khz and lower bit rates.
: decim_0_out; // >= 600khz single decim. stage , means 600khz and upper bit rates.
const auto& decimator_out = decim_1_out;
const auto& channel = decimator_out;

6
firmware/common/message.hpp
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@ -815,6 +815,12 @@ enum class OversampleRate : uint8_t {
/* Oversample rate of 32 times the sample rate. */
x32 = 32,
/* Oversample rate of 64 times the sample rate. */
x64 = 64,
/* Oversample rate of 128 times the sample rate. */
x128 = 128,
};
class SampleRateConfigMessage : public Message {

8
firmware/common/oversample.hpp
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@ -46,10 +46,12 @@
* The oversample rate is used to increase the sample rate to improve SNR and quality.
* This is also used as the interpolation rate when replaying captures. */
inline OversampleRate get_oversample_rate(uint32_t sample_rate) {
if (sample_rate < 25'000) return OversampleRate::x32;
if (sample_rate < 50'000) return OversampleRate::x16;
if (sample_rate < 50'000) return OversampleRate::x128; // 25kk ,16k, 12k5
if (sample_rate < 100'000) return OversampleRate::x64; // 50k
if (sample_rate < 150'000) return OversampleRate::x32; // 100k
if (sample_rate < 250'000) return OversampleRate::x16; // 150k only
return OversampleRate::x8;
return OversampleRate::x8; // 250k .. 1Mhz
}
/* Gets the actual sample rate for a given sample rate.