- completely drop ADF but copy necessary parts

o copy component audio_board from ADF and create custom component from it
  o copy component audio_hal from ADF and create custom component from it
  o copy component audio_sal from ADF and create custom component from it
  o copy component esp_peripherals from ADF and create custom component from it
- add fLaC support through xiph's original repository as a git module

components/audio_hal/audio_hal.c

@@ -0,0 +1,157 @@
+/*
+ * ESPRESSIF MIT License
+ *
+ * Copyright (c) 2018 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
+ *
+ * Permission is hereby granted for use on all ESPRESSIF SYSTEMS products, in
+ * which case, it is free of charge, to any person obtaining a copy of this
+ * software and associated documentation files (the "Software"), to deal in the
+ * Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "audio_hal.h"
+#include "driver/gpio.h"
+#include "esp_log.h"
+#include <string.h>
+
+#include "audio_mem.h"
+#include "audio_mutex.h"
+
+static const char *TAG = "AUDIO_HAL";
+
+#define AUDIO_HAL_CHECK_NULL(a, format, b, ...)                               \
+  if ((a) == 0)                                                               \
+    {                                                                         \
+      ESP_LOGE (TAG, format, ##__VA_ARGS__);                                  \
+      return b;                                                               \
+    }
+
+audio_hal_handle_t
+audio_hal_init (audio_hal_codec_config_t *audio_hal_conf,
+                audio_hal_func_t *audio_hal_func)
+{
+  esp_err_t ret = 0;
+  audio_hal_handle_t audio_hal
+      = (audio_hal_handle_t)audio_calloc (1, sizeof (audio_hal_func_t));
+  AUDIO_MEM_CHECK (TAG, audio_hal, return NULL);
+  memcpy (audio_hal, audio_hal_func, sizeof (audio_hal_func_t));
+  audio_hal->audio_hal_lock = mutex_create ();
+
+  AUDIO_MEM_CHECK (TAG, audio_hal->audio_hal_lock, {
+    audio_free (audio_hal);
+    return NULL;
+  });
+  mutex_lock (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_initialize (audio_hal_conf);
+  if (ret == ESP_FAIL)
+    {
+      audio_free (audio_hal);
+      if (audio_hal_func->handle)
+        {
+          return audio_hal_func->handle;
+        }
+      else
+        {
+          ESP_LOGE (TAG, "codec init failed!");
+          return NULL;
+        }
+    }
+  ret |= audio_hal->audio_codec_config_iface (audio_hal_conf->codec_mode,
+                                              &audio_hal_conf->i2s_iface);
+  ret |= audio_hal->audio_codec_set_volume (AUDIO_HAL_VOL_DEFAULT);
+  audio_hal->handle = audio_hal;
+  audio_hal_func->handle = audio_hal;
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return audio_hal;
+}
+
+esp_err_t
+audio_hal_deinit (audio_hal_handle_t audio_hal)
+{
+  esp_err_t ret;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  mutex_destroy (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_deinitialize ();
+  audio_hal->audio_hal_lock = NULL;
+  audio_hal->handle = NULL;
+  audio_free (audio_hal);
+  audio_hal = NULL;
+  return ret;
+}
+
+esp_err_t
+audio_hal_ctrl_codec (audio_hal_handle_t audio_hal,
+                      audio_hal_codec_mode_t mode,
+                      audio_hal_ctrl_t audio_hal_state)
+{
+  esp_err_t ret;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  mutex_lock (audio_hal->audio_hal_lock);
+  ESP_LOGI (TAG, "Codec mode is %d, Ctrl:%d", mode, audio_hal_state);
+  ret = audio_hal->audio_codec_ctrl (mode, audio_hal_state);
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return ret;
+}
+
+esp_err_t
+audio_hal_codec_iface_config (audio_hal_handle_t audio_hal,
+                              audio_hal_codec_mode_t mode,
+                              audio_hal_codec_i2s_iface_t *iface)
+{
+  esp_err_t ret = 0;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  AUDIO_HAL_CHECK_NULL (iface, "Get volume para is null", -1);
+  mutex_lock (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_config_iface (mode, iface);
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return ret;
+}
+
+esp_err_t
+audio_hal_set_mute (audio_hal_handle_t audio_hal, bool mute)
+{
+  esp_err_t ret;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  mutex_lock (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_set_mute (mute);
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return ret;
+}
+
+esp_err_t
+audio_hal_set_volume (audio_hal_handle_t audio_hal, int volume)
+{
+  esp_err_t ret;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  mutex_lock (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_set_volume (volume);
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return ret;
+}
+
+esp_err_t
+audio_hal_get_volume (audio_hal_handle_t audio_hal, int *volume)
+{
+  esp_err_t ret;
+  AUDIO_HAL_CHECK_NULL (audio_hal, "audio_hal handle is null", -1);
+  AUDIO_HAL_CHECK_NULL (volume, "Get volume para is null", -1);
+  mutex_lock (audio_hal->audio_hal_lock);
+  ret = audio_hal->audio_codec_get_volume (volume);
+  mutex_unlock (audio_hal->audio_hal_lock);
+  return ret;
+}