47 lines
1 KiB
C
47 lines
1 KiB
C
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#include "stream_wrapper.h"
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#include "ringbuffer.h"
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#include "passthrough.h"
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//#include "lustre/dsp_EchoCancel.h"
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#include <mutex>
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struct aec_params {
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float noise_power = 0.0f;
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float echo_return_gain = 1.0f;
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float fast_learn_rate = 1.0f/128;
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float learn_rate = 1.0f/1280;
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int sample_delay = 0;
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bool valid = false;
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};
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class aec_stream : public pwstream {
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public:
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aec_stream(pw_loop* lp, ringbuffer* hp, ringbuffer* mic,
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logger_record& record_stream, aec_params p = {});
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aec_params get_aec_params();
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void on_process() override;
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float cov[8192]; // From 1024 to 1024+2048 delay ?
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private:
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logger_record& pstrm;
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ringbuffer* hp_rb;
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ringbuffer* mic_rb;
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int hp_mic_delta = 0;
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/* When first sample from mic is acquired, where was the read head
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of the hp ringbuffer. This roughly tells us what is the delta in
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the 0-delay case. (Up to a quantum.)
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*/
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enum {INIT, SKIP_EARLY, SCAN_SILENT, SCAN_LOUD, INACTIVE} status;
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int remaining_samples = -1; // Remaining samples in current phase
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aec_params params;
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std::mutex prm_mutex;
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};
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