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Moved baseband temporary buffers back into class member variables.

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Significant performance hit when declaring on stack. C++ wants to initialize std::array or even raw array with element constructors, was resulting in ~7% CPU utilization, for a buffer that was immediately written over anyway.
This commit is contained in:
Jared Boone 2016-01-03 22:31:44 -08:00
parent 5547782f5a
commit d9017530c6
10 changed files with 42 additions and 45 deletions
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6
firmware/baseband/proc_ais.cpp
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@ -36,12 +36,6 @@ AISProcessor::AISProcessor() {
void AISProcessor::execute(const buffer_c8_t& buffer) {
/* 2.4576MHz, 2048 samples */
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
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 decimator_out = decim_1_out;

6
firmware/baseband/proc_ais.hpp
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@ -47,6 +47,12 @@ public:
void execute(const buffer_c8_t& buffer) override;
private:
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
dsp::decimate::FIRC16xR16x32Decim8 decim_1;
dsp::matched_filter::MatchedFilter mf { baseband::ais::rrc_taps_38k4_4t_p, 2 };

11
firmware/baseband/proc_am_audio.cpp
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@ -28,12 +28,6 @@ void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
return;
}
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
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);
@ -42,11 +36,6 @@ void NarrowbandAMAudio::execute(const buffer_c8_t& buffer) {
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*)dst.data(),
sizeof(*dst.data()) * dst.size()
};
auto audio = demod.execute(channel_out, work_audio_buffer);
audio_hpf.execute_in_place(audio);

10
firmware/baseband/proc_am_audio.hpp
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@ -40,6 +40,16 @@ public:
void on_message(const Message* const message) override;
private:
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
const buffer_s16_t work_audio_buffer {
(int16_t*)dst.data(),
sizeof(*dst.data()) * dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
dsp::decimate::FIRC16xR16x32Decim8 decim_1;
dsp::decimate::FIRAndDecimateComplex channel_filter;

11
firmware/baseband/proc_nfm_audio.cpp
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@ -29,12 +29,6 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
return;
}
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
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);
@ -42,11 +36,6 @@ void NarrowbandFMAudio::execute(const buffer_c8_t& buffer) {
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*)dst.data(),
sizeof(*dst.data()) * dst.size()
};
auto audio = demod.execute(channel_out, work_audio_buffer);
static uint64_t audio_present_history = 0;

10
firmware/baseband/proc_nfm_audio.hpp
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@ -39,6 +39,16 @@ public:
void on_message(const Message* const message) override;
private:
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
const buffer_s16_t work_audio_buffer {
(int16_t*)dst.data(),
sizeof(*dst.data()) * dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim8 decim_0;
dsp::decimate::FIRC16xR16x32Decim8 decim_1;

6
firmware/baseband/proc_tpms.cpp
View File

@ -57,12 +57,6 @@ TPMSProcessor::TPMSProcessor() {
void TPMSProcessor::execute(const buffer_c8_t& buffer) {
/* 2.4576MHz, 2048 samples */
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
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 decimator_out = decim_1_out;

6
firmware/baseband/proc_tpms.hpp
View File

@ -59,6 +59,12 @@ public:
void execute(const buffer_c8_t& buffer) override;
private:
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
dsp::decimate::FIRC16xR16x16Decim2 decim_1;

11
firmware/baseband/proc_wfm_audio.cpp
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@ -28,21 +28,10 @@ void WidebandFMAudio::execute(const buffer_c8_t& buffer) {
return;
}
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
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 decimator_out = decim_1_out;
const buffer_s16_t work_audio_buffer {
(int16_t*)decimator_out.p,
sizeof(*decimator_out.p) * decimator_out.count
};
auto channel = decimator_out;
// TODO: Feed channel_stats post-decimation data?

10
firmware/baseband/proc_wfm_audio.hpp
View File

@ -36,6 +36,16 @@ public:
void on_message(const Message* const message) override;
private:
std::array<complex16_t, 512> dst;
const buffer_c16_t dst_buffer {
dst.data(),
dst.size()
};
const buffer_s16_t work_audio_buffer {
(int16_t*)dst.data(),
sizeof(dst) / sizeof(int16_t)
};
dsp::decimate::FIRC8xR16x24FS4Decim4 decim_0;
dsp::decimate::FIRC16xR16x16Decim2 decim_1;