andy/tinyUSB
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Fix cycle based feedback calculation.

Browse Source
This commit is contained in:
HiFiPhile
2024-05-08 22:31:30 +02:00
parent 73d61fa2b8
commit 8dc767fa1d
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
src/class/audio/audio_device.c
View File

@@ -66,8 +66,10 @@
//--------------------------------------------------------------------+
// Use ring buffer if it's available, some MCUs need extra RAM requirements
// For DWC2 enable ring buffer will disable DMA (if available)
#ifndef TUD_AUDIO_PREFER_RING_BUFFER
#if CFG_TUSB_MCU == OPT_MCU_LPC43XX || CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX
#if CFG_TUSB_MCU == OPT_MCU_LPC43XX || CFG_TUSB_MCU == OPT_MCU_LPC18XX || CFG_TUSB_MCU == OPT_MCU_MIMXRT1XXX || \
defined(TUP_USBIP_DWC2)
#define TUD_AUDIO_PREFER_RING_BUFFER 0
#else
#define TUD_AUDIO_PREFER_RING_BUFFER 1
@@ -2347,11 +2349,11 @@ static bool audiod_set_fb_params_freq(audiod_function_t* audio, uint32_t sample_
if ((mclk_freq % sample_freq) == 0 && tu_is_power_of_two(mclk_freq / sample_freq))
{
audio->feedback.compute_method = AUDIO_FEEDBACK_METHOD_FREQUENCY_POWER_OF_2;
audio->feedback.compute.power_of_2 = 16 - audio->feedback.frame_shift - tu_log2(mclk_freq / sample_freq);
audio->feedback.compute.power_of_2 = 16 - (audio->feedback.frame_shift - 1) - tu_log2(mclk_freq / sample_freq);
}
else if ( audio->feedback.compute_method == AUDIO_FEEDBACK_METHOD_FREQUENCY_FLOAT)
{
audio->feedback.compute.float_const = (float)sample_freq / mclk_freq * (1UL << (16 - audio->feedback.frame_shift));
audio->feedback.compute.float_const = (float)sample_freq / mclk_freq * (1UL << (16 - (audio->feedback.frame_shift - 1)));
}
else
{
@@ -2411,7 +2413,7 @@ uint32_t tud_audio_feedback_update(uint8_t func_id, uint32_t cycles)
case AUDIO_FEEDBACK_METHOD_FREQUENCY_FIXED:
{
uint64_t fb64 = (((uint64_t) cycles) * audio->feedback.compute.fixed.sample_freq) << (16 - audio->feedback.frame_shift);
uint64_t fb64 = (((uint64_t) cycles) * audio->feedback.compute.fixed.sample_freq) << (16 - (audio->feedback.frame_shift - 1));
feedback = (uint32_t) (fb64 / audio->feedback.compute.fixed.mclk_freq);
}
break;