fix #433, fix the sps parse bug. 2.0.176

@@ -344,6 +344,7 @@ Remark:
 
 ### SRS 2.0 history
 
+* v2.0, 2015-07-01, fix [#433](https://github.com/simple-rtmp-server/srs/issues/433) fix the sps parse bug. 2.0.176
 * v2.0, 2015-06-10, fix [#425](https://github.com/simple-rtmp-server/srs/issues/425) refine the time jitter, correct (-inf,-250)+(250,+inf) to 10ms. 2.0.175
 * v2.0, 2015-06-10, fix [#424](https://github.com/simple-rtmp-server/srs/issues/424) fix aggregate timestamp bug. 2.0.174
 * v2.0, 2015-06-06, fix [#421](https://github.com/simple-rtmp-server/srs/issues/421) drop video for unkown RTMP header.

@@ -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    175
+#define VERSION_REVISION    176
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -981,11 +981,11 @@ int SrsAvcAacCodec::avc_demux_sps_rbsp(char* rbsp, int nb_rbsp)
     }
     srs_info("sps parse profile=%d, level=%d, sps_id=%d", profile_idc, level_idc, seq_parameter_set_id);
     
+    int32_t chroma_format_idc = -1;
     if (profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 244
         || profile_idc == 44 || profile_idc == 83 || profile_idc == 86 || profile_idc == 118
         || profile_idc == 128
     ) {
-        int32_t chroma_format_idc = -1;
         if ((ret = srs_avc_nalu_read_uev(&bs, chroma_format_idc)) != ERROR_SUCCESS) {
             return ret;
         }
@@ -1016,11 +1016,20 @@ int SrsAvcAacCodec::avc_demux_sps_rbsp(char* rbsp, int nb_rbsp)
             return ret;
         }
         if (seq_scaling_matrix_present_flag) {
+            int nb_scmpfs = ((chroma_format_idc != 3)? 8:12);
+            for (int i = 0; i < nb_scmpfs; i++) {
+                int8_t seq_scaling_matrix_present_flag_i = -1;
+                if ((ret = srs_avc_nalu_read_bit(&bs, seq_scaling_matrix_present_flag_i)) != ERROR_SUCCESS) {
+                    return ret;
+                }
+                if (seq_scaling_matrix_present_flag_i) {
                     ret = ERROR_HLS_DECODE_ERROR;
-            srs_error("sps the seq_scaling_matrix_present_flag invalid. ret=%d", ret);
+                    srs_error("sps the seq_scaling_matrix_present_flag invalid, i=%d, nb_scmpfs=%d. ret=%d", i, nb_scmpfs, ret);
                     return ret;
                 }
             }
+        }
+    }
     
     int32_t log2_max_frame_num_minus4 = -1;
     if ((ret = srs_avc_nalu_read_uev(&bs, log2_max_frame_num_minus4)) != ERROR_SUCCESS) {