[media] uvcvideo: Extract video stream statistics

[firefly-linux-kernel-4.4.55.git] / drivers / media / video / uvc / uvcvideo.h

diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h
index d975636cbb100a15fc8096635b157cca6a13bacc..f9ee62ed01503f10e6f7b954a4b96881b5aeba42 100644 (file)
--- a/drivers/media/video/uvc/uvcvideo.h
+++ b/drivers/media/video/uvc/uvcvideo.h
@@ -356,6 +356,28 @@ struct uvc_video_chain {
        struct mutex ctrl_mutex;                /* Protects ctrl.info */
 };
 
+struct uvc_stats_frame {
+       unsigned int size;              /* Number of bytes captured */
+       unsigned int first_data;        /* Index of the first non-empty packet */
+
+       unsigned int nb_packets;        /* Number of packets */
+       unsigned int nb_empty;          /* Number of empty packets */
+       unsigned int nb_invalid;        /* Number of packets with an invalid header */
+       unsigned int nb_errors;         /* Number of packets with the error bit set */
+};
+
+struct uvc_stats_stream {
+       struct timespec start_ts;       /* Stream start timestamp */
+       struct timespec stop_ts;        /* Stream stop timestamp */
+
+       unsigned int nb_frames;         /* Number of frames */
+
+       unsigned int nb_packets;        /* Number of packets */
+       unsigned int nb_empty;          /* Number of empty packets */
+       unsigned int nb_invalid;        /* Number of packets with an invalid header */
+       unsigned int nb_errors;         /* Number of packets with the error bit set */
+};
+
 struct uvc_streaming {
        struct list_head list;
        struct uvc_device *dev;
@@ -406,6 +428,10 @@ struct uvc_streaming {
 
        /* debugfs */
        struct dentry *debugfs_dir;
+       struct {
+               struct uvc_stats_frame frame;
+               struct uvc_stats_stream stream;
+       } stats;
 };
 
 enum uvc_device_state {
@@ -477,6 +503,7 @@ struct uvc_driver {
 #define UVC_TRACE_SUSPEND      (1 << 8)
 #define UVC_TRACE_STATUS       (1 << 9)
 #define UVC_TRACE_VIDEO                (1 << 10)
+#define UVC_TRACE_STATS                (1 << 11)
 
 #define UVC_WARN_MINMAX                0
 #define UVC_WARN_PROBE_DEF     1
@@ -609,10 +636,13 @@ extern struct usb_host_endpoint *uvc_find_endpoint(
 void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream,
                struct uvc_buffer *buf);
 
-/* debugfs */
+/* debugfs and statistics */
 int uvc_debugfs_init(void);
 void uvc_debugfs_cleanup(void);
 int uvc_debugfs_init_stream(struct uvc_streaming *stream);
 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream);
 
+size_t uvc_video_stats_dump(struct uvc_streaming *stream, char *buf,
+                           size_t size);
+
 #endif