diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
new file mode 100644
index 000000000..3447c962f
--- /dev/null
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,66 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ 4.0release, develop ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ 4.0release, develop ]
+  schedule:
+    - cron: '43 11 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'cpp' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+          # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+      # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+      # If this step fails, then you should remove it and run the build manually (see below)
+      #- name: Autobuild
+      #  uses: github/codeql-action/autobuild@v1
+
+      # ℹ️ Command-line programs to run using the OS shell.
+      # 📚 https://git.io/JvXDl
+
+      # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+      #    and modify them (or add more) to build your code if your project
+      #    uses a compiled language
+      - name: Build SRS
+        run: |
+         cd trunk && ./configure && make
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1
diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index 23ec86081..9033ef7e3 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -552,18 +552,6 @@ fi
 #####################################################################################
 # srtp
 #####################################################################################
-# For openssl-1.1.*, we should disable SRTP ASM, because SRTP only works with openssl-1.0.*
-if [[ $SRS_SRTP_ASM == YES ]]; then
-    echo "  #include <openssl/ssl.h>                              " > ${SRS_OBJS}/_tmp_srtp_asm_detect.c
-    echo "  #if OPENSSL_VERSION_NUMBER >= 0x10100000L // v1.1.x   " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c
-    echo "  #error \"SRTP only works with openssl-1.0.*\"         " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c
-    echo "  #endif                                                " >> ${SRS_OBJS}/_tmp_srtp_asm_detect.c
-    ${SRS_TOOL_CC} -c ${SRS_OBJS}/_tmp_srtp_asm_detect.c -I${SRS_OBJS}/openssl/include -o /dev/null >/dev/null 2>&1
-    if [[ $? -ne 0 ]]; then
-        SRS_SRTP_ASM=NO && echo "Warning: Disable SRTP-ASM optimization, please update docker";
-    fi
-    rm -f ${SRS_OBJS}/_tmp_srtp_asm_detect.c
-fi;
 SRTP_CONFIG="echo SRTP without openssl(ASM) optimization" && SRTP_OPTIONS=""
 # If use ASM for SRTP, we enable openssl(with ASM).
 if [[ $SRS_SRTP_ASM == YES ]]; then
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index c82241052..e6afab909 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -1116,14 +1116,6 @@ srs_error_t SrsRtcPublishStream::on_rtp(char* data, int nb_data)
         return err;
     }
 
-    // If payload type is configed to drop, ignore this packet.
-    if (pt_to_drop_) {
-        uint8_t pt = srs_rtp_fast_parse_pt(data, nb_data);
-        if (pt_to_drop_ == pt) {
-            return err;
-        }
-    }
-
     // Decode the header first.
     if (twcc_id_) {
         // We must parse the TWCC from RTP header before SRTP unprotect, because:
@@ -1140,6 +1132,14 @@ srs_error_t SrsRtcPublishStream::on_rtp(char* data, int nb_data)
         }
     }
 
+    // If payload type is configed to drop, ignore this packet.
+    if (pt_to_drop_) {
+        uint8_t pt = srs_rtp_fast_parse_pt(data, nb_data);
+        if (pt_to_drop_ == pt) {
+            return err;
+        }
+    }
+
     // Decrypt the cipher to plaintext RTP data.
     char* plaintext = data;
     int nb_plaintext = nb_data;