fix #310, refine aac LC, support aac HE/HEv2. 2.0.134.

@@ -550,6 +550,7 @@ Supported operating systems and hardware:
 
 ### SRS 2.0 history
 
+* v2.0, 2015-03-08, fix [#310](https://github.com/winlinvip/simple-rtmp-server/issues/310), refine aac LC, support aac HE/HEv2. 2.0.134.
 * v2.0, 2015-03-06, for [#322](https://github.com/winlinvip/simple-rtmp-server/issues/322), fix http-flv stream bug, support multiple streams. 2.0.133.
 * v2.0, 2015-03-06, refine http request parse. 2.0.132.
 * v2.0, 2015-03-01, for [#179](https://github.com/winlinvip/simple-rtmp-server/issues/179), revert dvr http api. 2.0.128.

@@ -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    133
+#define VERSION_REVISION    134
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -87,6 +87,18 @@ string srs_codec_aac_profile2str(SrsAacProfile aac_profile)
     }
 }
 
+string srs_codec_aac_object2str(SrsAacObjectType aac_object)
+{
+    switch (aac_object) {
+        case SrsAacObjectTypeAacMain: return "Main";
+        case SrsAacObjectTypeHE: return "HE";
+        case SrsAacObjectTypeHEV2: return "HEv2";
+        case SrsAacObjectTypeAacLC: return "LC";
+        case SrsAacObjectTypeAacSSR: return "SSR";
+        default: return "Other";
+    }
+}
+
 SrsAacObjectType srs_codec_aac_ts2rtmp(SrsAacProfile profile)
 {
     switch (profile) {
@@ -101,6 +113,8 @@ SrsAacProfile srs_codec_aac_rtmp2ts(SrsAacObjectType object_type)
 {
     switch (object_type) {
         case SrsAacObjectTypeAacMain: return SrsAacProfileMain;
+        case SrsAacObjectTypeHE:
+        case SrsAacObjectTypeHEV2:
         case SrsAacObjectTypeAacLC: return SrsAacProfileLC;
         case SrsAacObjectTypeAacSSR: return SrsAacProfileSSR;
         default: return SrsAacProfileReserved;

@@ -404,7 +404,13 @@ enum SrsAacObjectType
     SrsAacObjectTypeAacMain = 1,
     SrsAacObjectTypeAacLC = 2,
     SrsAacObjectTypeAacSSR = 3,
+    
+    // AAC HE = LC+SBR
+    SrsAacObjectTypeHE = 5,
+    // AAC HEv2 = LC+SBR+PS
+    SrsAacObjectTypeHEV2 = 29,
 };
+std::string srs_codec_aac_object2str(SrsAacObjectType aac_object);
 // ts/hls/adts audio header profile to RTMP sequence header object type.
 SrsAacObjectType srs_codec_aac_ts2rtmp(SrsAacProfile profile);
 // RTMP sequence header object type to ts/hls/adts audio header profile.