fix #588, kbps interface error. 2.0.228

@@ -345,6 +345,7 @@ Remark:
 
 ## History
 
+* v2.0, 2017-01-11, fix [#588][bug #588], kbps interface error. 2.0.228
 * v2.0, 2017-01-11, fix [#736][bug #736], recovery the hls dispose. 2.0.227
 * v2.0, 2017-01-10, refine hls html5 video template.
 * v2.0, 2017-01-10, fix [#635][bug #635], hls support NonIDR(open gop). 2.0.226
@@ -1272,6 +1273,7 @@ Winlin
 [bug #513]: https://github.com/ossrs/srs/issues/513
 [bug #730]: https://github.com/ossrs/srs/issues/730
 [bug #635]: https://github.com/ossrs/srs/issues/635
+[bug #588]: https://github.com/ossrs/srs/issues/588
 [bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx
 
 [exo #828]: https://github.com/google/ExoPlayer/pull/828

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    227
+#define VERSION_REVISION    228
 
 // generated by configure, only macros.
 #include <srs_auto_headers.hpp>

@@ -126,7 +126,7 @@ void SrsKbps::set_io(ISrsProtocolStatistic* in, ISrsProtocolStatistic* out)
     is.io.in = in;
     is.last_bytes = is.io_bytes_base = 0;
     if (in) {
-        is.last_bytes = is.io_bytes_base = in->get_recv_bytes();
+        is.bytes += is.io.in->get_recv_bytes() - is.io_bytes_base;
     }
     // resample
     is.sample();
@@ -138,7 +138,7 @@ void SrsKbps::set_io(ISrsProtocolStatistic* in, ISrsProtocolStatistic* out)
     }
     // save the old in bytes.
     if (os.io.out) {
-        os.bytes += os.last_bytes - os.io_bytes_base;
+        os.bytes += os.io.out->get_send_bytes() - os.io_bytes_base;
     }
     // use new io.
     os.io.out = out;
@@ -192,12 +192,36 @@ int SrsKbps::get_recv_kbps_5m()
 
 int64_t SrsKbps::get_send_bytes()
 {
-    return os.get_total_bytes();
+    // we must calc the send bytes dynamically,
+    // to not depends on the sample(which used to calc the kbps).
+    // @read https://github.com/ossrs/srs/issues/588
+    
+    // session start bytes.
+    int64_t bytes = os.bytes;
+    
+    // session delta.
+    if (os.io.out) {
+        bytes += os.io.out->get_send_bytes() - os.io_bytes_base;
+    }
+    
+    return bytes;
 }
 
 int64_t SrsKbps::get_recv_bytes()
 {
-    return is.get_total_bytes();
+    // we must calc the send bytes dynamically,
+    // to not depends on the sample(which used to calc the kbps).
+    // @read https://github.com/ossrs/srs/issues/588
+    
+    // session start bytes.
+    int64_t bytes = is.bytes;
+    
+    // session delta.
+    if (is.io.in) {
+        bytes += is.io.in->get_recv_bytes() - is.io_bytes_base;
+    }
+    
+    return bytes;
 }
 
 void SrsKbps::resample()

@@ -95,13 +95,9 @@ public:
     SrsKbpsSlice();
     virtual ~SrsKbpsSlice();
 public:
-    /**
-    * get current total bytes.
-    */
+    // Get current total bytes, not depend on sample().
     virtual int64_t get_total_bytes();
-    /**
-    * resample all samples.
-    */
+    // Resample the slice to calculate the kbps.
     virtual void sample();
 };
 
@@ -162,6 +158,13 @@ public:
  *      printf("delta is %d/%d", delta->get_send_bytes_delta(), delta->get_recv_bytes_delta());
  *      delta->cleanup();
  *   the server never know how many bytes already send/recv, for the connection maybe closed.
+ * 4. kbps used as ISrsProtocolStatistic, to provides raw bytes:
+ *      SrsKbps* kbps = ...;
+ *      kbps->set_io(in, out);
+ *      // both kbps->get_recv_bytes() and kbps->get_send_bytes() are available.
+ *      // we can use the kbps as the data source of another kbps:
+ *      SrsKbps* user = ...;
+ *      user->set_io(kbps, kbps);
  */
 class SrsKbps : public virtual ISrsProtocolStatistic, public virtual IKbpsDelta
 {