fix dvr mem leak, free msg when not use it.

@@ -26,6 +26,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #ifdef SRS_AUTO_DVR
 
 #include <srs_kernel_error.hpp>
+#include <srs_protocol_rtmp_stack.hpp>
 
 SrsDvr::SrsDvr(SrsSource* source)
 {
@@ -55,12 +56,14 @@ int SrsDvr::on_meta_data(SrsAmf0Object* metadata)
 int SrsDvr::on_audio(SrsSharedPtrMessage* audio)
 {
     int ret = ERROR_SUCCESS;
+    srs_freep(audio);
     return ret;
 }
 
 int SrsDvr::on_video(SrsSharedPtrMessage* video)
 {
     int ret = ERROR_SUCCESS;
+    srs_freep(video);
     return ret;
 }
 

@@ -79,6 +79,7 @@ int SrsEncoder::on_publish(SrsRequest* req)
         srs_error("st_thread_create failed. ret=%d", ret);
         return ret;
     }
+    srs_trace("encoder thread cid=%d, current_cid=%d", pthread->cid(), _srs_context->get_id());
     
     return ret;
 }

@@ -61,6 +61,7 @@ SrsThread::SrsThread(ISrsThreadHandler* thread_handler, int64_t interval_us)
     
     tid = NULL;
     loop = false;
+    _cid = -1;
 }
 
 SrsThread::~SrsThread()
@@ -68,6 +69,11 @@ SrsThread::~SrsThread()
     stop();
 }
 
+int SrsThread::cid()
+{
+    return _cid;
+}
+
 int SrsThread::start()
 {
     int ret = ERROR_SUCCESS;
@@ -83,6 +89,11 @@ int SrsThread::start()
         return ret;
     }
     
+    // wait for cid to ready, for parent thread to get the cid.
+    while (_cid < 0) {
+        st_usleep(10 * SRS_TIME_MILLISECONDS);
+    }
+    
     return ret;
 }
 
@@ -111,6 +122,7 @@ void SrsThread::thread_cycle()
 {
     int ret = ERROR_SUCCESS;
     
+    _cid = _srs_context->get_id();
     srs_assert(handler);
     
     _srs_context->generate_id();

@@ -84,6 +84,7 @@ class SrsThread
 {
 private:
     st_thread_t tid;
+    int _cid;
     bool loop;
 private:
     ISrsThreadHandler* handler;
@@ -98,6 +99,12 @@ public:
     virtual ~SrsThread();
 public:
     /**
+    * get the context id. @see: ISrsThreadContext.get_id().
+    * used for parent thread to get the id.
+    * @remark when start thread, parent thread will block and wait for this id ready.
+    */
+    virtual int cid();
+    /**
     * start the thread, invoke the cycle of handler util
     * user stop the thread.
     * @remark ignore any error of cycle of handler.

@@ -124,4 +124,8 @@ extern bool srs_is_little_endian();
         className(const className&); \
         className& operator= (const className&)
 
+// const time for st to convert to us
+#define SRS_TIME_MILLISECONDS 1000
+#define SRS_TIME_SECONDS 1000000
+
 #endif