Embedding flac file in ROM

main/CMakeLists.txt

@@ -5,4 +5,6 @@ set(COMPONENT_PRIV_REQUIRES )
 set(COMPONENT_SRCS "main.c")
 set(COMPONENT_ADD_INCLUDEDIRS "")
 
+set(COMPONENT_EMBED_FILES "flac_sample_small.flac")
+
 register_component()

main/component.mk

@@ -1,8 +1,10 @@
 #
 # Main component makefile.
 #
-# This Makefile can be left empty. By default, it will take the sources in the 
-# src/ directory, compile them and link them into lib(subdirectory_name).a 
+# This Makefile can be left empty. By default, it will take the sources in the
+# src/ directory, compile them and link them into lib(subdirectory_name).a
 # in the build directory. This behaviour is entirely configurable,
 # please read the ESP-IDF documents if you need to do this.
 #
+
+COMPONENT_EMBED_FILES := flac_sample_small.flac

main/main.c

@@ -13,6 +13,9 @@
 
 static xQueueHandle i2s_evt_queue = NULL;
 
+extern const uint8_t flac_file_start[] asm("_binary_flac_sample_small_flacc_start");
+extern const uint8_t flac_file_end[] asm("_binary_flac_sample_small_flacc_end");
+
 void init_i2s() {
     i2s_config_t i2s_config = {
         .mode = I2S_MODE_MASTER | I2S_MODE_TX | I2S_MODE_DAC_BUILT_IN,
@@ -52,7 +55,7 @@ void app_main(void)
     i2s_evt_queue = xQueueCreate(10, sizeof(uint32_t));
     init_i2s();
     init_gpio();
-    int i = 0;
+
     while (1) {
         if (xQueueReceive(i2s_evt_queue, &num, portMAX_DELAY)) {
             play = !play;