for #151, #268, refine the pcr start at 0, dts/pts plus delay. 1.0.25

@@ -240,7 +240,7 @@ public:
                     *p++ = 7;    // size
                     *p++ = 0x50; // random access + PCR
                     // about the pcr, read https://github.com/winlinvip/simple-rtmp-server/issues/151#issuecomment-71352511
-                    p = write_pcr(p, frame->dts - SRS_AUTO_HLS_DELAY);
+                    p = write_pcr(p, frame->dts);
                 }
                 
                 // PES header
@@ -296,11 +296,11 @@ public:
                 *p++ = header_size;
 
                 // pts; // 33bits
-                p = write_pts(p, flags >> 6, frame->pts);
+                p = write_pts(p, flags >> 6, frame->pts + SRS_AUTO_HLS_DELAY);
                 
                 // dts; // 33bits
                 if (frame->dts != frame->pts) {
-                    p = write_pts(p, 1, frame->dts);
+                    p = write_pts(p, 1, frame->dts + SRS_AUTO_HLS_DELAY);
                 }
             }
             
@@ -371,10 +371,12 @@ private:
     }
     static char* write_pcr(char* p, int64_t pcr)
     {
-        // the pcr=dts-delay
-        // and the pcr maybe negative
+        // the pcr=dts-delay, where dts = frame->dts + delay
+        // and the pcr should never be negative
         // @see https://github.com/winlinvip/simple-rtmp-server/issues/268
-        int64_t v = srs_max(0, pcr);
+        srs_assert(pcr >= 0);
+        
+        int64_t v = pcr;
         
         *p++ = (char) (v >> 25);
         *p++ = (char) (v >> 17);

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       1
 #define VERSION_MINOR       0
-#define VERSION_REVISION    24
+#define VERSION_REVISION    25
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"