From 59f1d083ea9c949251e786b29781a927afd6911e Mon Sep 17 00:00:00 2001
From: Pablo Garrido <pablogs9@gmail.com>
Date: Wed, 12 Feb 2025 13:37:36 +0100
Subject: [PATCH] Initial esp_camera_available_frames implementation

---
 driver/cam_hal.c                 | 5 +++++
 driver/esp_camera.c              | 7 +++++++
 driver/include/esp_camera.h      | 5 +++++
 driver/private_include/cam_hal.h | 2 ++
 4 files changed, 19 insertions(+)

diff --git a/driver/cam_hal.c b/driver/cam_hal.c
index 86b430a..4daaee7 100644
--- a/driver/cam_hal.c
+++ b/driver/cam_hal.c
@@ -535,3 +535,8 @@ void cam_give_all(void) {
         cam_obj->frames[x].en = 1;
     }
 }
+
+bool cam_get_available_frames(void)
+{
+    return 0 < uxQueueMessagesWaiting(cam_obj->frame_buffer_queue);
+}
\ No newline at end of file
diff --git a/driver/esp_camera.c b/driver/esp_camera.c
index 7c693a6..20a0367 100644
--- a/driver/esp_camera.c
+++ b/driver/esp_camera.c
@@ -490,3 +490,10 @@ void esp_camera_return_all(void) {
     cam_give_all();
 }
 
+bool esp_camera_available_frames(void)
+{
+    if (s_state == NULL) {
+        return false;
+    }
+    return cam_get_available_frames();
+}
diff --git a/driver/include/esp_camera.h b/driver/include/esp_camera.h
index ff459cb..01af844 100755
--- a/driver/include/esp_camera.h
+++ b/driver/include/esp_camera.h
@@ -240,6 +240,11 @@ esp_err_t esp_camera_load_from_nvs(const char *key);
  */
 void esp_camera_return_all(void);
 
+/**
+ * @brief Check if there are available frames to be immediately acquired
+ */
+bool esp_camera_available_frames(void);
+
 
 #ifdef __cplusplus
 }
diff --git a/driver/private_include/cam_hal.h b/driver/private_include/cam_hal.h
index cd0d3aa..b6f812f 100644
--- a/driver/private_include/cam_hal.h
+++ b/driver/private_include/cam_hal.h
@@ -57,6 +57,8 @@ void cam_give(camera_fb_t *dma_buffer);
 
 void cam_give_all(void);
 
+bool cam_get_available_frames(void);
+
 #ifdef __cplusplus
 }
 #endif