davinci encoder: fps measurements

modules/codec/davinci/encoder.c

@@ -59,6 +59,12 @@ struct encoder_sys_t
 
     XDM_BufDesc in;
     XDM_BufDesc out;
+
+    /* stats */
+    mtime_t i_pts_start;
+    mtime_t i_pts_end;
+    int     i_fps;
+    int     i_pics;
 };
 
 /*****************************************************************************
@@ -257,6 +263,7 @@ static int davinci_InitBuffers( encoder_t *p_enc )
                             p_enc->fmt_out.video.i_frame_rate * 1000 /
                             p_enc->fmt_out.video.i_frame_rate_base :
                             p_enc->i_iframes * 1000; /* Frames per 1000 seconds  */
+    p_sys->i_fps = dparams.refFrameRate / 1000;
     dparams.targetFrameRate = dparams.refFrameRate; /* input fps = output fps */
     dparams.targetBitRate = p_enc->fmt_out.i_bitrate;
     dparams.intraFrameInterval = p_enc->i_iframes;
@@ -325,6 +332,29 @@ static block_t *EncodeVideo( encoder_t *p_enc, picture_t *p_pic )
             return NULL;
     }
 
+    p_sys->i_pics++;
+    if( p_sys->i_pics == 1 )
+    {
+        p_sys->i_pts_start = mdate();
+    }
+
+    if( p_sys->i_pics == p_sys->i_fps )
+    {
+        mtime_t i_diff; /* in us */
+        double f_fps;
+
+        p_sys->i_pts_end = mdate(); /* in us */
+        i_diff = (p_sys->i_pts_end - p_sys->i_pts_start);
+        f_fps = (double)((i_diff / (int64_t)p_sys->i_pics)); /* 1 frame per us */
+        f_fps = ((double)1/f_fps) * (double)1000000;
+        msg_Info( p_enc, "Encoder: %d frames per %"PRId64" micro seconds (%4.2f fps)",
+                  p_sys->i_pics, i_diff, f_fps );
+
+        /* reset timers */
+        p_sys->i_pics = 0;
+        p_sys->i_pts_start = p_sys->i_pts_end = (mtime_t)0;
+    }
+
     davinci_CopyPictureToXDM( p_enc, &p_sys->in, p_pic );
 
     /* Configure input */