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removing dead code from getSamples()

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This commit is contained in:
Frank 2022-08-14 14:47:03 +02:00
parent 8acb44b202
commit c6691564a5
1 changed files with 2 additions and 15 deletions
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17
usermods/audioreactive/audio_source.h
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@ -79,9 +79,6 @@ class AudioSource {
*/
virtual void getSamples(float *buffer, uint16_t num_samples) = 0;
/* Get an up-to-date sample without DC offset */
virtual int getSampleWithoutDCOffset() { return _sampleNoDCOffset; };
/* check if the audio source driver was initialized successfully */
virtual bool isInitialized(void) {return(_initialized);}
@ -97,15 +94,11 @@ class AudioSource {
AudioSource(int sampleRate, int blockSize) :
_sampleRate(sampleRate),
_blockSize(blockSize),
_sampleNoDCOffset(0),
_dcOffset(0.0f),
_initialized(false)
{};
int _sampleRate; // Microphone sampling rate
int _blockSize; // I2S block size
volatile int _sampleNoDCOffset; // Up-to-date sample without DCOffset
float _dcOffset; // Rolling average DC offset
bool _initialized; // Gets set to true if initialization is successful
};
@ -199,9 +192,6 @@ class I2SSource : public AudioSource {
size_t bytes_read = 0; /* Counter variable to check if we actually got enough data */
I2S_datatype newSamples[num_samples]; /* Intermediary sample storage */
// Reset dc offset
_dcOffset = 0.0f;
err = i2s_read(I2S_NUM_0, (void *)newSamples, sizeof(newSamples), &bytes_read, portMAX_DELAY);
if (err != ESP_OK) {
DEBUGSR_PRINTF("Failed to get samples: %d\n", err);
@ -216,8 +206,9 @@ class I2SSource : public AudioSource {
// Store samples in sample buffer and update DC offset
for (int i = 0; i < num_samples; i++) {
newSamples[i] = postProcessSample(newSamples[i]); // perform postprocessing (needed for ADC samples)
newSamples[i] = postProcessSample(newSamples[i]); // perform postprocessing (needed for ADC samples)
float currSample = 0.0f;
#ifdef I2S_SAMPLE_DOWNSCALE_TO_16BIT
currSample = (float) newSamples[i] / 65536.0f; // 32bit input -> 16bit; keeping lower 16bits as decimal places
@ -225,11 +216,7 @@ class I2SSource : public AudioSource {
currSample = (float) newSamples[i]; // 16bit input -> use as-is
#endif
buffer[i] = currSample;
_dcOffset = ((_dcOffset * 31.0f) + currSample) / 32.0f;
}
// Update no-DC sample
_sampleNoDCOffset = buffer[num_samples - 1] - _dcOffset;
}
}