Merge identical code to reduce duplication

Signed-off-by: imliubo <[email protected]>

Author: imliubo

src/media.cpp

@@ -3,31 +3,34 @@
 
 #include "main.h"
 
-#if CONFIG_OPENAI_BOARD_ESP32_S3
 #define OPUS_OUT_BUFFER_SIZE 1276  // 1276 bytes is recommended by opus_encode
+
+#if CONFIG_OPENAI_BOARD_ESP32_S3  // Default ESP32-S3 board config
 #define SAMPLE_RATE 8000
 #define BUFFER_SAMPLES 320
 
+#define I2S_DATA_OUT_PORT I2S_NUM_0
+#define I2S_DATA_IN_PORT I2S_NUM_1
 #define MCLK_PIN 0
 #define DAC_BCLK_PIN 15
 #define DAC_LRCLK_PIN 16
 #define DAC_DATA_PIN 17
 #define ADC_BCLK_PIN 38
 #define ADC_LRCLK_PIN 39
 #define ADC_DATA_PIN 40
-#elif CONFIG_OPENAI_BOARD_M5_ATOMS3R
+#elif CONFIG_OPENAI_BOARD_M5_ATOMS3R  // ATOMS3R board with Atomic EchoBase
 #include "es8311.h"
-#define OPUS_OUT_BUFFER_SIZE 1276   // 1276 bytes is recommended by opus_encode
-#define SAMPLE_RATE          16000  //! EchoBase not support 8K sample rate :)
-#define BUFFER_SAMPLES       (320 * 2)
+#define SAMPLE_RATE 16000  //! EchoBase not support 8K sample rate :)
+#define BUFFER_SAMPLES (320 * 2)
 
-#define I2C_PORT    I2C_NUM_1
+#define I2C_PORT I2C_NUM_1
 #define I2C_FREQ_HZ 400000
 #define I2C_SCL_PIN 39
 #define I2C_SDA_PIN 38
 
-#define I2S_PORT      I2S_NUM_1
-#define MCLK_PIN      -1
+#define I2S_DATA_OUT_PORT I2S_NUM_1
+#define I2S_DATA_IN_PORT I2S_DATA_OUT_PORT
+#define MCLK_PIN -1
 #define DAC_BCLK_PIN  8
 #define DAC_LRCLK_PIN 6
 #define DAC_DATA_PIN  5
@@ -154,7 +157,7 @@ void oai_init_audio_capture() {
   }
 
   i2s_pin_config_t pin_config_out = {
-    .mck_io_num   = -1,
+    .mck_io_num   = MCLK_PIN,
     .bck_io_num   = DAC_BCLK_PIN,
     .ws_io_num    = DAC_LRCLK_PIN,
     .data_out_num = DAC_DATA_PIN,
@@ -188,11 +191,7 @@ void oai_audio_decode(uint8_t *data, size_t size) {
 
   if (decoded_size > 0) {
     size_t bytes_written = 0;
-#if CONFIG_OPENAI_BOARD_ESP32_S3
-    i2s_write(I2S_NUM_0, output_buffer, BUFFER_SAMPLES * sizeof(opus_int16),
-              &bytes_written, portMAX_DELAY);
-#elif CONFIG_OPENAI_BOARD_M5_ATOMS3R
-    i2s_write(I2S_PORT, output_buffer, BUFFER_SAMPLES * sizeof(opus_int16),
+    i2s_write(I2S_DATA_OUT_PORT, output_buffer, BUFFER_SAMPLES * sizeof(opus_int16),
               &bytes_written, portMAX_DELAY);
 #endif
   }
@@ -227,13 +226,8 @@ void oai_init_audio_encoder() {
 void oai_send_audio(PeerConnection *peer_connection) {
   size_t bytes_read = 0;
 
-#if CONFIG_OPENAI_BOARD_ESP32_S3
-  i2s_read(I2S_NUM_1, encoder_input_buffer, BUFFER_SAMPLES, &bytes_read,
+  i2s_read(I2S_DATA_IN_PORT, encoder_input_buffer, BUFFER_SAMPLES, &bytes_read,
            portMAX_DELAY);
-#elif CONFIG_OPENAI_BOARD_M5_ATOMS3R
-  i2s_read(I2S_PORT, encoder_input_buffer, BUFFER_SAMPLES, &bytes_read,
-           portMAX_DELAY);
-#endif
 
   auto encoded_size =
       opus_encode(opus_encoder, encoder_input_buffer, BUFFER_SAMPLES / 2,