UAC2: Implement feedback by fifo counting.
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@@ -3,6 +3,7 @@
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*
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* Copyright (c) 2020 Ha Thach (tinyusb.org)
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* Copyright (c) 2020 Reinhard Panhuber
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* Copyright (c) 2023 HiFiPhile
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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@@ -487,7 +488,6 @@ TU_ATTR_WEAK void tud_audio_fb_done_cb(uint8_t func_id);
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// feedback = n_cycles / n_frames * f_s / f_m in 16.16 format, where n_cycles are the number of main clock cycles within fb_n_frames
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bool tud_audio_n_fb_set(uint8_t func_id, uint32_t feedback);
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static inline bool tud_audio_fb_set(uint32_t feedback);
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// Update feedback value with passed cycles since last time this update function is called.
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// Typically called within tud_audio_sof_isr(). Required tud_audio_feedback_params_cb() is implemented
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@@ -500,9 +500,7 @@ enum {
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AUDIO_FEEDBACK_METHOD_FREQUENCY_FIXED,
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AUDIO_FEEDBACK_METHOD_FREQUENCY_FLOAT,
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AUDIO_FEEDBACK_METHOD_FREQUENCY_POWER_OF_2,
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// impelemnt later
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// AUDIO_FEEDBACK_METHOD_FIFO_COUNT
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AUDIO_FEEDBACK_METHOD_FIFO_COUNT
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};
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typedef struct {
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@@ -514,11 +512,6 @@ typedef struct {
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uint32_t mclk_freq; // Main clock frequency in Hz i.e. master clock to which sample clock is based on
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}frequency;
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#if 0 // implement later
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struct {
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uint32_t threshold_bytes; // minimum number of bytes received to be considered as filled/ready
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}fifo_count;
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#endif
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};
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}audio_feedback_params_t;
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