neteq_rtpplay: Add an error message for unmatched SSRC

webrtc/modules/audio_coding/neteq/tools/neteq_rtpplay.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include <errno.h>
 #include <inttypes.h>
 #include <limits.h>  // For ULONG_MAX returned by strtoul.
 #include <stdio.h>
 #include <stdlib.h>  // For strtoul.
 
 #include <algorithm>
+#include <ios>
 #include <iostream>
 #include <memory>
 #include <string>
 
 #include "gflags/gflags.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/modules/audio_coding/neteq/include/neteq.h"
 #include "webrtc/modules/audio_coding/neteq/tools/fake_decode_from_file.h"
 #include "webrtc/modules/audio_coding/neteq/tools/input_audio_file.h"
 #include "webrtc/modules/audio_coding/neteq/tools/neteq_packet_source_input.h"
@@ skipping 210 matching lines @@
   return -1;
 }
 
 // Class to let through only the packets with a given SSRC. Should be used as an
 // outer layer on another NetEqInput object.
 class FilterSsrcInput : public NetEqInput {
  public:
   FilterSsrcInput(std::unique_ptr<NetEqInput> source, uint32_t ssrc)
       : source_(std::move(source)), ssrc_(ssrc) {
     FindNextWithCorrectSsrc();
+    RTC_CHECK(source_->NextHeader()) << "Found no packet with SSRC = 0x"
+                                     << std::hex << ssrc_;
   }
 
   // All methods but PopPacket() simply relay to the |source_| object.
   rtc::Optional<int64_t> NextPacketTime() const override {
     return source_->NextPacketTime();
   }
   rtc::Optional<int64_t> NextOutputEventTime() const override {
     return source_->NextOutputEventTime();
   }
 
@@ skipping 191 matching lines @@
   return 0;
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {
   webrtc::test::RunTest(argc, argv);
 }