I2S buffer size as parameter

Author: pschatzmann

examples/examples-stream/streams-i2s-filter-i2s/streams-i2s-filter-i2s.ino

@@ -43,7 +43,7 @@ void setup(void) {
   config_in.pin_bck = 15;
   config_in.pin_data = 16;
   // config_in.fixed_mclk = sample_rate * 256
-  // config_in.pin_mck = 2
+  // config_in.pin_mck = 3
 
   in.begin(config_in);
 

examples/examples-stream/streams-i2s-i2s/streams-i2s-i2s.ino

@@ -32,7 +32,7 @@ void setup(void) {
   config.pin_data = 16;
   config.pin_data_rx = 17;
   //config.fixed_mclk = sample_rate * 256;
-  // config.pin_mck = 2; // must be 0,1 or 2 - only for ESP_IDF_VERSION_MAJOR >= 4
+  // config.pin_mck = 3; // must be 0,1 or 3 - only for ESP_IDF_VERSION_MAJOR >= 4
   i2s.begin(config);
 
   Serial.println("I2S started...");

src/AudioI2S/I2SConfig.h

@@ -72,10 +72,14 @@ class I2SConfig : public AudioBaseInfo {
     I2SFormat i2s_format = I2S_STD_FORMAT;
 
 #ifdef ESP32
+    int buffer_count = I2S_BUFFER_COUNT;
+    int buffer_size = I2S_BUFFER_SIZE;
+
     bool is_digital = true;  // e.g. the ESP32 supports analog input or output
     bool auto_clear;
     bool use_apll = I2S_USE_APLL; 
     uint32_t fixed_mclk = 0; 
+
 #if ESP_IDF_VERSION_MAJOR >= 4 
     int pin_mck = -1;
 #endif
@@ -90,14 +94,16 @@ class I2SConfig : public AudioBaseInfo {
       LOGI("number of channels: %d", channels);
       LOGI("i2s_format: %s", i2s_formats[i2s_format]);
 #ifdef ESP32
-      LOGI("I2S_AUTO_CLEAR=%d",auto_clear);
-
+      LOGI("auto_clear:%d",auto_clear);
       if (use_apll) {
         LOGI("use_apll: %s", use_apll ? "true" : "false");
       }
       if (fixed_mclk){
         LOGI("fixed_mclk: %d", fixed_mclk);
       }
+      LOGI("buffer_count:%d",buffer_count);
+      LOGI("buffer_size:%d",buffer_size);
+
 #endif
 
       LOGI("pin_bck: %d", pin_bck);

src/AudioI2S/I2SESP32.h

@@ -136,18 +136,15 @@ class I2SBase {
       this->i2s_num = (i2s_port_t) cfg.port_no; 
       setChannels(cfg.channels);
 
-      LOGI("I2S_BUFFER_COUNT=%d",I2S_BUFFER_COUNT);
-      LOGI("I2S_BUFFER_SIZE=%d",I2S_BUFFER_SIZE);
-
       i2s_config_t i2s_config_new = {
             .mode = toMode(cfg),
             .sample_rate = (eps32_i2s_sample_rate_type)cfg.sample_rate,
             .bits_per_sample = (i2s_bits_per_sample_t) cfg.bits_per_sample,
             .channel_format = I2S_CHANNEL_FMT_RIGHT_LEFT,
             .communication_format = toCommFormat(cfg.i2s_format),
             .intr_alloc_flags = 0, // default interrupt priority
-            .dma_buf_count = I2S_BUFFER_COUNT,
-            .dma_buf_len = I2S_BUFFER_SIZE,
+            .dma_buf_count = cfg.buffer_count,
+            .dma_buf_len = cfg.buffer_size,
             .use_apll = (bool) cfg.use_apll,
             .tx_desc_auto_clear = cfg.auto_clear, 
             .fixed_mclk = (int) (cfg.fixed_mclk>0 ? cfg.fixed_mclk : 0 )