Search found 5 matches

by paddlesteamer
Thu Jun 24, 2021 10:13 am
Forum: ESP-ADF
Topic: Custom Audio Element Problem
Replies: 6
Views: 12752

Re: Custom Audio Element Problem

Hello,

I think your approach is not real-time. In the loop function, you first call `i2s_read_bytes` then wait 6 ms, then you send them to i2s output, and then, again you read the next batch. The latter batch you read is 6 ms late. I don't know Arduino-style coding on esp32 but there should be a ...
by paddlesteamer
Sat May 15, 2021 6:12 pm
Forum: ESP-IDF
Topic: esp-idf linker script question
Replies: 2
Views: 4780

esp-idf linker script question

Hello,

I'm trying to keep an unreferenced function in the memory and later call it from another file. My files are like this:

main/linker.lf:

[sections:fnreg]
entries:
fnreg

[scheme:fnreg]
entries:
fnreg -> dram0_data

[mapping:map]
archive: libmain.a
entries:
fn1 (fnreg);
fnreg -> dram0 ...
by paddlesteamer
Thu Apr 01, 2021 8:36 pm
Forum: ESP-ADF
Topic: Custom Audio Element Problem
Replies: 6
Views: 12752

Re: Custom Audio Element Problem

Ok, the problem is caused by `uint16_t`. Converting it to `int16_t` solved the problem. Here is the corrected part:


static int el_process(audio_element_handle_t self, char *buf, int len) {
int rsize = audio_element_input(self, buf, len);

if (len != rsize || (rsize % 4) != 0) {
ESP_LOGW(TAG ...
by paddlesteamer
Thu Apr 01, 2021 8:18 pm
Forum: ESP-ADF
Topic: Custom Audio Element Problem
Replies: 6
Views: 12752

Re: Custom Audio Element Problem

Ok, there were many things wrong with this code. Here is the correct version:


#include <string.h>
#include "board.h"
#include "esp_log.h"
#include "audio_pipeline.h"
#include "audio_element.h"
#include "i2s_stream.h"

static const char *TAG = "ELEMENTEXAMPLE";

static esp_err_t el_open(audio ...
by paddlesteamer
Thu Apr 01, 2021 3:07 pm
Forum: ESP-ADF
Topic: Custom Audio Element Problem
Replies: 6
Views: 12752

Custom Audio Element Problem

Hello,

I'm trying to write my own audio element. The board I'm using is LyraT v4.3. I created a pipeline i2s_stream_reader -> my_element -> i2s_stream_writer. In the process function of 'my_element', if I forward the samples without doing anything with them, I can hear my voice from the headphones ...

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