feat(bt): pont data SCO HCI vers audio_router

Ajoute sco_incoming_cb et sco_outgoing_cb dans bt_hfp.c.
Enregistre les callbacks sur AUDIO_STATE connecte (CVSD/mSBC).
REQUIRES audio_router dans CMakeLists.txt.
Build vert, boot non regressé (flash + monitor 2026-06-19).

components/bt_hfp/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
     SRCS "bt_hfp.c"
     INCLUDE_DIRS "include"
-    REQUIRES bt
+    REQUIRES bt audio_router
 )

components/bt_hfp/bt_hfp.c

@@ -20,6 +20,7 @@
 #include "esp_bt_device.h"
 #include "esp_gap_bt_api.h"
 #include "esp_hf_client_api.h"
+#include "audio_router.h"
 
 #define TAG "bt_hfp"
 
@@ -35,6 +36,18 @@ static void emit(bt_hfp_event_t ev, const char *number, bool msbc)
     }
 }
 
+/* ---- Callbacks data SCO : pont PCM BT <-> audio_router ---- */
+static void sco_incoming_cb(const uint8_t *buf, uint32_t len)
+{
+    audio_router_sco_feed_playback(buf, len);
+    esp_hf_client_outgoing_data_ready();
+}
+
+static uint32_t sco_outgoing_cb(uint8_t *buf, uint32_t len)
+{
+    return audio_router_sco_take_capture(buf, len);
+}
+
 /* ---- GAP callback : appairage / authentification / SSP ---- */
 static void gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param)
 {
@@ -133,6 +146,7 @@ static void hf_cb(esp_hf_client_cb_event_t event, esp_hf_client_cb_param_t *para
                          ESP_HF_CLIENT_AUDIO_STATE_CONNECTED_MSBC);
             ESP_LOGI(TAG, "audio SCO connecte (%s)", msbc ? "mSBC 16k" : "CVSD 8k");
             emit(BT_HFP_EV_AUDIO_CONNECTED, NULL, msbc);
+            esp_hf_client_register_data_callback(sco_incoming_cb, sco_outgoing_cb);
         } else if (param->audio_stat.state == ESP_HF_CLIENT_AUDIO_STATE_DISCONNECTED) {
             ESP_LOGI(TAG, "audio SCO deconnecte");
             emit(BT_HFP_EV_AUDIO_DISCONNECTED, NULL, false);