pio
3 weeks ago
parent
58bb5d5d12
commit
bcc0ad0c59
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#ifndef _HX_MEMCPY_H |
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#define _HX_MEMCPY_H |
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/**
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* @brief combine two separate buffers into interleaved one |
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* @param sz - samples per output buffer (divisible by 2) |
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* @param dst - pointer to source buffer |
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* @param srcA - pointer to A source buffer (even samples) |
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* @param srcB - pointer to B source buffer (odd samples) |
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* @retval none |
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*/ |
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inline void memcpyInterleave_f32(float32_t *srcA, float32_t *srcB, float32_t *dst, int16_t sz) |
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{ |
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while(sz) |
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{ |
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*dst++ = *srcA++; |
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*dst++ = *srcB++; |
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sz--; |
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*dst++ = *srcA++; |
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*dst++ = *srcB++; |
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sz--;
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} |
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} |
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inline void memcpyInterleave_f32(float32_t *srcA, float32_t *srcB, float32_t *dst, int16_t sz); |
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inline void memcpyDeinterleave_f32(float32_t *src, float32_t *dstA, float32_t *dstB, int16_t sz) |
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{ |
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while(sz) |
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{ |
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*dstA++ = *src++; |
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*dstB++ = *src++; |
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sz--; |
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*dstA++ = *src++; |
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*dstB++ = *src++; |
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sz--;
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} |
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} |
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inline void memcpyDeinterleave_f32(float32_t *src, float32_t *dstA, float32_t *dstB, int16_t sz); |
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#endif // _HX_MEMCPY_H
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@ -0,0 +1,70 @@ |
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#include "basic_bypassStereo_F32.h" |
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bool bypass_process(audio_block_f32_t** p_blockL, audio_block_f32_t** p_blockR, bypass_mode_t mode, bool state) |
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{ |
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bool result = false; |
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/**
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* @brief bypass mode PASS can be used to validate the incoming audio blocks, create silence blocks if the input ones
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* are not available (NULL).
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*/ |
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if (!state) mode = BYPASS_MODE_PASS; |
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switch(mode) |
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{ |
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/**
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* @brief TRAILS mode is the same as OFF with the different the component "update" function does not return |
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* and processes the incoming data, which is silence. Used in reverb/delays to let them naturally
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* fade out |
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*/ |
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case BYPASS_MODE_TRAILS: |
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/**
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* @brief bypass mode OFF sends silence on both outputs. Used with components placed in an effect loop with separate |
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* dry path. Classic example is a parallel effect loop used for delays and reverbs:
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* input ------------> |0 |---> output |
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* |--->reverb --> |1 mixer| |
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*/ |
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case BYPASS_MODE_OFF: |
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if (*p_blockL) AudioStream_F32::release(*p_blockL); // discard both input blocks
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if (*p_blockR) AudioStream_F32::release(*p_blockR); |
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*p_blockL = NULL; |
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*p_blockR = NULL; |
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// no break - let it run through the next switch case, with input blocks as NULL it will emit silence on both channels
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/**
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* @brief PASS mode connects the input signal directly to the output |
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* in case one of the blocks is not available, it tries to allocate a new block and make it silent |
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* returns false if allocation is not possbile due to not enoufg audio memory (increase AudioMemory_F32(xx);) |
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* Used in components connected in series. |
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*/ |
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case BYPASS_MODE_PASS: |
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if(!*p_blockL) // no channel left available
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{ |
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*p_blockL = AudioStream_F32::allocate_f32(); // try to allocate a new block
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if( !*p_blockL) |
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{ |
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if (*p_blockR) AudioStream_F32::release(*p_blockR); // if the Rch is present, release/discard it
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result = false; |
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break; // operation failed due to no audio memory left
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} |
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memset(&(*p_blockL)->data[0], 0, (*p_blockL)->length*sizeof(float32_t)); // zero the data block to make it silent
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} |
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if(!*p_blockR) // no channel right available
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{ |
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*p_blockR = AudioStream_F32::allocate_f32(); |
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if( !*p_blockR) // no memory for a new block, but we might have L channel zeroed
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{ |
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if (*p_blockL) AudioStream_F32::release(*p_blockL); // blockL is available and contains audio. Discard it
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result = false; |
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break; // and sigbnal failed operation
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} |
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memset(&(*p_blockR)->data[0], 0, (*p_blockR)->length*sizeof(float32_t));
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} |
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result = true; // audio data on L and R is avaialble
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break; |
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default: |
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break; |
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} |
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return result; |
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} |
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@ -0,0 +1,31 @@ |
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#ifndef _BASIC_BYPASSSTEREO_F32_H_ |
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#define _BASIC_BYPASSSTEREO_F32_H_ |
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#include "Arduino.h" |
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#include "AudioStream_F32.h" |
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typedef enum |
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{ |
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BYPASS_MODE_PASS, // pass the input signal to the output
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BYPASS_MODE_OFF, // mute the output
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BYPASS_MODE_TRAILS // mutes the input only
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}bypass_mode_t; |
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/**
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* @brief Stereo bypass handling and validating the input audio blocks |
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* The main component has to provide the pointers to audio blocks received inside the "update" function |
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* This function checks whether they are avaiable and genereates silence where needed (null block received) |
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* With the bypass OFF (state=false) it can be used to validate the input blocks before processing. |
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*
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* @param p_blockL pointer to an audio_block_f32_t pointer received/allocated in the main compontnt, channel L |
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* @param p_blockR pointer to an audio_block_f32_t pointer received/allocated in the main compontnt, channel R |
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* @param mode one of the bypass models defined in bypass_mode_t enum |
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* @param state bypass state, true = effect OFF, false = effect ON |
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* @return true operation succesful, blocks are available for further processing |
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* @return false fail, some of the blocks are not available, do not process the data |
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*/ |
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bool bypass_process(audio_block_f32_t** p_blockL, audio_block_f32_t** p_blockR, bypass_mode_t mode, bool state); |
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#endif // _BASIC_BYPASSSTEREO_F32_H_
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